Positioning and clamping device

Abstract

The positioning and clamping device provided by the present invention comprises: a base provided with two channels, two rod bodies are movably arranged in the two channels respectively; one end of the rod body is connected to a crank arm provided with a first and a second positioning convex point, and the other end is respectively connected to a connecting rod; an intermediate connecting rod is connected between the two connecting rods, and its connection point with the two connecting rods is a first and a second pivot point; a first connecting block with a first connecting ear, and its two ends are respectively connected to the first pivot point and a power mechanism; the first connecting ear is connected to a first clamping member, and the first clamping member is provided with a first clamping convex point matched with the first positioning convex point; a second connecting block with two second connecting ears, one of which is connected to the second pivot point, and the other second connecting ear is connected to a second clamping member, and the second clamping member is provided with a second clamping convex point matched with the second positioning convex point. The present invention can realize simultaneous positioning and clamping of both ends of a workpiece through a power mechanism, and has a better positioning and clamping effect and is easy to operate.

Description

Technical Field

[0001] The invention relates to the field of workpiece positioning and clamping equipment, and in particular to a positioning and clamping device. Background Art

[0002] The description in this section merely provides background information related to the present disclosure and does not constitute prior art.

[0003] When welding and other operations are performed on workpieces such as the longitudinal beams, cross beams, left and right suspensions, and various torsion beam rear axle suspension arms involved in the frame, they need to be positioned and pressed to reduce the impact of part errors so that their positions are fixed for easy operation.

[0004] The clamping mechanism of the prior art can generally only realize single-end clamping, that is, one clamping mechanism can only clamp and fix one end of the workpiece. Therefore, two clamping mechanisms are usually required to clamp the two ends of the workpiece respectively.

[0005] Since each clamping mechanism is equipped with a driving mechanism (such as a hydraulic cylinder or a pneumatic cylinder) and a set of connecting rod mechanisms driven by the driving mechanism. Therefore, two clamping mechanisms are used to clamp the two ends of the workpiece respectively. Under the drive of two independent and unrelated driving mechanisms, the movement of the two sets of connecting rod mechanisms is difficult to achieve consistency, and it is easy for one end of the workpiece to be clamped while the other end is not, and the dimensional impact caused by the material thickness in the left and right directions of the parts is relatively large. In addition, the above solution requires the control of two hydraulic cylinders or pneumatic cylinders, which is inconvenient to operate.

[0006] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present invention and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the present invention. Summary of the invention

[0007] Based on the above-mentioned defects of the prior art, an embodiment of the present invention provides a positioning and clamping device, which can realize simultaneous positioning and clamping of both ends of a workpiece through a power mechanism, has better positioning and clamping effect of the workpiece, and is easy to operate.

[0008] In order to achieve the above object, the present invention provides the following technical solutions.

[0009] A positioning and pressing device, comprising:

[0010] The base is provided with a first channel and a second channel; the first channel and the second channel are respectively provided with a movable first rod body and a movable second rod body; the ends of the first rod body and the second rod body on the same side of the base are connected to a crank arm, and the crank arm is provided with a first positioning convex point and a second positioning convex point; the ends of the first rod body and the second rod body on the other side of the base are respectively rotatably connected to the first connecting rod and the second connecting rod;

[0011] An intermediate connecting rod, two ends of which are rotatably connected to the first connecting rod and the second connecting rod respectively; the rotational connection points of the intermediate connecting rod and the first connecting rod and the second connecting rod are the first pivot point and the second pivot point respectively;

[0012] A first connecting block having a first rotation fulcrum and a first connecting ear, wherein the first connecting ear is located between two ends of the first connecting block, and the first rotation fulcrum is located between the first connecting ear and the first pivot point; one end of the first connecting block is rotationally connected to the first pivot point, and the other end is rotationally connected to the power mechanism; the first connecting block can rotate around the first rotation fulcrum under the drive of the power mechanism;

[0013] A first pressing member, one end of which is rotatably connected to the first connecting ear, and the other end of which is provided with a first pressing protrusion matched with the first positioning protrusion;

[0014] The second connecting block has two second connecting ears and a second rotation fulcrum located between the two second connecting ears, wherein one of the second connecting ears is rotationally connected to the second pivot point; the second connecting block can rotate around the second rotation fulcrum under the drive of the intermediate connecting rod;

[0015] The second pressing piece has one end rotatably connected with another second connecting ear, and the other end is provided with a second pressing protrusion matched with the second positioning protrusion.

[0016] Preferably, a first bushing is provided in the first channel, and the first rod body is inserted into the first bushing.

[0017] Preferably, the first bushing is a self-lubricating bushing, and the outer wall of the first rod body is isolated from the inner wall of the first channel.

[0018] Preferably, a second bushing is provided in the second channel, and the second rod body passes through the second bushing.

[0019] Preferably, the second bushing is a self-lubricating bushing, and the outer wall of the second rod body is isolated from the inner wall of the second channel.

[0020] Preferably, the first positioning protrusion and the second positioning protrusion are located on the same side of the crank arm.

[0021] Preferably, the first positioning protrusion and the second positioning protrusion are arranged on the surface of the crank arm facing away from the base.

[0022] Preferably, the first positioning protrusion and the second positioning protrusion are respectively arranged at positions close to both ends of the crank arm.

[0023] Preferably, the first positioning protrusion comprises a body and a tapered end disposed on the body, and a plurality of deformation grooves are disposed on the body in a staggered manner.

[0024] Preferably, the first positioning protrusion and / or the first pressing protrusion are made of elastic material.

[0025] Preferably, the number of the second positioning protrusions and the number of the second pressing protrusions are both two, and the second positioning protrusions and / or the second pressing protrusions are columnar.

[0026] Preferably, a positioning card for positioning or limiting the workpiece is provided on the crank arm, and the positioning card is located on one side of the first positioning protrusion or the second positioning protrusion.

[0027] Preferably, a fixing plate is provided on the base; the first connecting block is rotatably connected to the fixing plate via a first rotating fulcrum, and the second connecting block is rotatably connected to the fixing plate via a second rotating fulcrum.

[0028] Preferably, the first pressing member has a third rotation fulcrum located between the two ends, and the first pressing member is rotatably connected to the support through the third rotation fulcrum.

[0029] Preferably, the cross section of the first pressing member is L-shaped, and has a first bending portion and a second bending portion, and the third rotation fulcrum is formed at the intersection of the first bending portion and the second bending portion.

[0030] Preferably, the second pressing member has a fourth rotation fulcrum located between the two ends, and the second pressing member is rotatably connected to the support through the fourth rotation fulcrum.

[0031] Preferably, the second pressing member has a third bending portion and a fourth bending portion connected to each other, and the second rotation fulcrum is formed at the intersection of the third bending portion and the fourth bending portion.

[0032] Preferably, the first connecting ear is rotatably connected to one end of the third connecting rod, and the other end of the third connecting rod is rotatably connected to the first pressing member through the first locking mechanism;

[0033] When the positioning and clamping device is in the clamping state, the first locking mechanism limits the first clamping member to the current position.

[0034] Preferably, the first locking mechanism has a first connection point rotatably connected to the base, a second connection point rotatably connected to the first pressing member, and a first intermediate connection point located between the first connection point and the second connection point; the first locking mechanism itself can rotate around the first intermediate connection point;

[0035] When the positioning and clamping device is in a clamping state, the torque generated by the reaction force applied by the first clamping member to the first locking mechanism at the first intermediate connection point is zero.

[0036] Preferably, the first locking mechanism includes a first intermediate connecting block and a fourth connecting rod; the first intermediate connecting block has a first intermediate connecting ear rotatably connected to the other end of the third connecting rod, and the first intermediate connecting ear is located between the two ends of the first intermediate connecting block; one end of the first intermediate connecting block is rotatably connected to the base, and the other end is rotatably connected to one end of the fourth connecting rod, and the other end of the fourth connecting rod is rotatably connected to the first clamping member.

[0037] Preferably, the rotational connection point between the first intermediate connection block and the base is the first connection point, the rotational connection point between the fourth connecting rod and the first pressing member is the second connection point, and the rotational connection point between the first intermediate connection block and the fourth connecting rod is the first intermediate connection point;

[0038] When the positioning and clamping device is in a clamping state, the first connection point, the second connection point and the first intermediate connection point are located on the same straight line.

[0039] Preferably, the rotation connection point between the third connecting rod and the first intermediate connecting block is not on the same straight line as the first connection point and the second connection point.

[0040] Preferably, the other second connecting ear is rotatably connected to one end of the fifth connecting rod, and the other end of the fifth connecting rod is rotatably connected to the second pressing member through the second locking mechanism;

[0041] When the positioning and pressing device is in the pressing state, the second locking mechanism limits the second pressing member to the current position.

[0042] Preferably, the second locking mechanism has a third connection point rotatably connected to the base, a fourth connection point rotatably connected to the second pressing member, and a second intermediate connection point located between the third connection point and the fourth connection point; the second locking mechanism itself can rotate around the second intermediate connection point;

[0043] When the positioning and clamping device is in the clamping state, the torque generated by the reaction force applied by the second clamping member to the second locking mechanism at the second intermediate connection point is zero.

[0044] Preferably, the second locking mechanism includes a second intermediate connecting block and a sixth connecting rod; the second intermediate connecting block has a second intermediate connecting ear rotatably connected to the other end of the fifth connecting rod, and the second intermediate connecting ear is located between the two ends of the second intermediate connecting block; one end of the second intermediate connecting block is rotatably connected to the base, and the other end is rotatably connected to one end of the sixth connecting rod, and the other end of the sixth connecting rod is rotatably connected to the second clamping member.

[0045] Preferably, the rotation connection point between the second intermediate connection block and the base is the third connection point, the rotation connection point between the sixth connecting rod and the second pressing member is the fourth connection point, and the rotation connection point between the second intermediate connection block and the sixth connecting rod is the second intermediate connection point;

[0046] When the positioning and clamping device is in a clamping state, the third connection point, the fourth connection point and the second middle connection point are located on the same straight line.

[0047] Preferably, the rotation connection point between the fifth connecting rod and the second intermediate connecting block is not on the same straight line as the third connection point and the fourth connection point.

[0048] Preferably, the fifth connecting rod is provided with an avoidance groove, and the avoidance groove is provided for the end of the intermediate connecting rod to be embedded when the positioning and clamping device is in the open state.

[0049] Preferably, the power mechanism is any one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder, which includes a cylinder barrel and a telescopic rod; wherein the cylinder barrel has the freedom to swing toward or away from the base, and the telescopic rod is rotationally connected to the end of the first connecting block.

[0050] Preferably, the positioning and pressing device is further provided with a stop block cooperating with the first connecting block;

[0051] When the power mechanism drives the first connecting block to rotate until the first connecting block contacts the stop block, the positioning and clamping device is in a clamping state;

[0052] When the power mechanism drives the first connecting block to rotate until the first connecting block is located at a preset position where it is disengaged from the stop block, the positioning and clamping device is in an open state.

[0053] Preferably, the intermediate link protrudes toward the base at a position close to the second link, and the first pivot point and the second pivot point are located on the same vertical line; the portion of the intermediate link between the protruding portion and the first pivot point is inclined toward the base.

[0054] A positioning and pressing device, comprising:

[0055] The base is provided with a first channel and a second channel; a first rod body and a second rod body are movably inserted in the first channel and the second channel respectively; the first rod body has a first end and a second end opposite to each other, and the second rod body has a third end and a fourth end opposite to each other; the first end and the third end are located on one side of the base, and the second end and the fourth end are located on the other side of the base; the first end and the third end are connected to a curved arm, and a first positioning protrusion and a second positioning protrusion are provided on the curved arm;

[0056] a first connecting rod, rotatably connected to the second end;

[0057] a second connecting rod, rotatably connected to the fourth end;

[0058] An intermediate connecting rod, two ends of which are rotatably connected to the first connecting rod and the second connecting rod respectively; the rotational connection points of the intermediate connecting rod and the first connecting rod and the second connecting rod are the first pivot point and the second pivot point respectively;

[0059] A first connecting block having a first rotation fulcrum and a first connecting ear, wherein the first connecting ear is located between two ends of the first connecting block, and the first rotation fulcrum is located between the first connecting ear and the first pivot point; one end of the first connecting block is rotationally connected to the first pivot point, and the other end is rotationally connected to the power mechanism; the first connecting block can rotate around the first rotation fulcrum under the drive of the power mechanism;

[0060] A third connecting rod, one end of which is rotatably connected to the first connecting ear;

[0061] A first intermediate connecting block having a first intermediate connecting ear, the first intermediate connecting ear being located between two ends of the first intermediate connecting block; the first intermediate connecting ear being rotatably connected to the other end of the third connecting rod; one end of the first intermediate connecting block being rotatably connected to the top end of the base, and the other end being rotatably connected to one end of the fourth connecting rod;

[0062] A first pressing member, one end of which is rotatably connected to the other end of the fourth connecting rod, and the other end of which is provided with a first pressing protrusion matched with the first positioning protrusion;

[0063] The second connecting block has two second connecting ears and a second rotation fulcrum located between the two second connecting ears, wherein one of the second connecting ears is rotationally connected to the second pivot point, and the other second connecting ear is rotationally connected to one end of the fifth connecting rod; the second connecting block can rotate around the second rotation fulcrum under the drive of the middle connecting rod;

[0064] A second intermediate connecting block having a second intermediate connecting ear, the second intermediate connecting ear being located between two ends of the second intermediate connecting block; the second intermediate connecting ear being rotatably connected to the other end of the fifth connecting rod; one end of the second intermediate connecting block being rotatably connected to the bottom end of the base, and the other end being rotatably connected to one end of the sixth connecting rod;

[0065] The second pressing member has one end rotatably connected to the other end of the sixth connecting rod, and the other end is provided with a second pressing protrusion matched with the second positioning protrusion.

[0066] Preferably, the first middle connecting block and the fourth connecting rod constitute a first locking mechanism, and the second middle connecting block and the sixth connecting rod constitute a second locking mechanism;

[0067] When the first locking mechanism is in the locking position, two end points of the first intermediate connecting block and the rotation connection point between the fourth connecting rod and the first pressing member are located on the same straight line;

[0068] When the second locking mechanism is in the locking position, two end points of the second intermediate connecting block and the rotation connection point between the sixth connecting rod and the second pressing member are located on the same straight line;

[0069] When the power mechanism moves to the first predetermined position, the first locking mechanism and the second locking mechanism reach the locking position simultaneously.

[0070] Preferably, the power mechanism is any one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder, which comprises a cylinder barrel and a telescopic rod;

[0071] The first predetermined position is when the telescopic rod is completely retracted into the cylinder.

[0072] Preferably, when the first locking mechanism and the second lock are in the locked position, the positioning and clamping device is in a clamped state.

[0073] Preferably, when the first locking mechanism is in the unlocking position, the two end points of the first intermediate connecting block and the rotation connection point of the fourth connecting rod and the first pressing member are not on the same straight line;

[0074] When the second locking mechanism is in the unlocking position, the two end points of the second intermediate connecting block and the rotation connection point of the sixth connecting rod and the second pressing member are not on the same straight line;

[0075] When the power mechanism moves from the first predetermined position to the second predetermined position, the first locking mechanism and the second locking mechanism are simultaneously switched from the locking position to the unlocking position.

[0076] Preferably, the second predetermined position is when the telescopic rod at least partially extends from the cylinder.

[0077] Preferably, when the first locking mechanism and the second lock are in the unlocked position, the positioning and clamping device is in an open state.

[0078] The positioning and clamping device of the embodiment of the present invention is provided with a first channel and a second channel in the base, and a first rod body and a second rod body that can move therein are inserted in the first channel and the second channel, and the ends of the first rod body and the second rod body located on the same side of the base are connected with a crank arm provided with a first positioning convex point and a second positioning convex point. The crank arm can be translated by a multi-link driven by a power mechanism. The multi-link can also drive the first clamping member and the second clamping member to rotate toward or away from the first positioning convex point and the second positioning convex point under the drive of the power mechanism, so as to realize the first clamping convex point and the second clamping convex point arranged on the first clamping member and the second clamping member respectively cooperate with the first positioning convex point and the second positioning convex point. Thus, the first positioning convex point and the first clamping convex point that match each other clamp one end of the workpiece, and the second positioning convex point and the second clamping convex point that match each other clamp the other end of the workpiece. Thereby, the simultaneous positioning and clamping of the two ends of the workpiece are realized by a power mechanism.

[0079] Therefore, in practice, only one power mechanism needs to be controlled to quickly complete the positioning and clamping of both ends of the workpiece, without having to consider the problem that the two ends of the workpiece cannot be positioned and clamped at the same time due to the different actions of multiple power mechanisms. Therefore, the positioning and clamping effect of the workpiece is better and the operation is simple.

[0080] In addition, by staggeredly arranging a plurality of deformation grooves on the body of the first positioning protrusion, and making at least one of the matching first positioning protrusion and the first pressing protrusion made of elastic material, when the positioning and pressing device of the embodiment of the present invention is in a pressing state, the first positioning protrusion can undergo axial compression deformation. In this way, it is possible to achieve compression of workpieces of different specifications and realize a floating pressing function. Moreover, the compression deformation of the first positioning protrusion can generate a reverse pressing force on the workpiece, increase the pressing force, and improve the pressing effect.

[0081] With reference to the following description and the accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby.

[0082] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0083] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes and are used to help understand the present invention. They do not specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances. In the drawings:

[0085] Figure 1 It is a schematic diagram of the three-dimensional structure of the positioning and clamping device of the embodiment of the present invention in a clamping state, when viewed from the front side and upward after the fixing plate is removed;

[0086] Figure 2 It is a schematic diagram of the three-dimensional structure of the positioning and clamping device of the embodiment of the present invention in a clamping state, when viewed from the front side and from a top view after the fixing plate is removed;

[0087] Figure 3 It is a schematic diagram of the back side structure of the positioning and clamping device of an embodiment of the present invention in a clamped state;

[0088] Figure 4 It is a schematic structural diagram of the positioning and clamping device of an embodiment of the present invention in a clamping state, viewed from the front side after the fixing plate is removed;

[0089] Figure 5It is a schematic structural diagram of the positioning and clamping device of an embodiment of the present invention in an open state, viewed from the front side after the fixing plate is removed;

[0090] Figure 6 It is a three-dimensional structural schematic diagram of a multi-link self-locking force-expanding and clamping mechanism of a known embodiment in the prior art;

[0091] Figure 7 6 is a side structural schematic diagram of the multi-link self-locking force-expanding clamping mechanism. DETAILED DESCRIPTION

[0092] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0093] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0094] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0095] Publication No. CN108480828A provides a known embodiment of a multi-link self-locking force-expanding clamping mechanism, which is a typical solution that can only clamp one end of a workpiece.

[0096] like Figure 6 and Figure 7As shown, the multi-link self-locking force-expanding clamping mechanism of the known embodiment includes: a base 1, a connecting plate 2, a rotating arm 7, a clamping cylinder 15 and a connecting rod mechanism. Among them, the base 1 is connected to the connecting plate 2, and the connecting plate 2 is provided with a first and a second positioning block 3, 4. The rotating arm 7 is hinged to the connecting plate 2, and is provided with a third and a fourth positioning block 5, 6 that cooperate with the first and the second positioning blocks 3, 4. The clamping cylinder 15 drives the rotating arm 7 to rotate around its hinge point with the connecting plate 2. The connecting rod mechanism includes a mounting plate 14 fixed on the connecting plate 2, and a first, a second, a third, and a fourth connecting rod 8, 9, 11, and 12. One end of the first connecting rod 8 is hinged to the rotating arm 7, and the other end is hinged to the second connecting rod 9, and the lower end of the second connecting rod 9 is hinged to the mounting plate 14. One end of the third connecting rod 11 is hinged to the fourth connecting rod 12, and the other end is hinged to the second connecting rod 9. One end of the fourth connecting rod 12 is hinged to the clamping cylinder 15 through the connecting block 13 , and the other end is hinged to the mounting plate 14 .

[0097] The working principle of the above-mentioned known embodiment is as follows: the piston rod of the clamping cylinder 15 extends to drive the fourth connecting rod 12 connected thereto, the fourth connecting rod 12 drives the third connecting rod 11 hinged thereto, the third connecting rod 11 drives the second connecting rod 9 hinged thereto, the second connecting rod 9 drives the first connecting rod 8 hinged thereto, and finally the first connecting rod 8 drives the rotating arm 7 hinged thereto and the third and fourth positioning blocks 5 and 6 on the rotating arm 7 to rotate. When the hinge points of the third connecting rod 11 and the fourth connecting rod 12 are on the same straight line and the limit block 10 is pressed against the third connecting rod 11, the force expansion and compression action is completed and self-locking.

[0098] Since the positions of the first and second positioning blocks 3 and 4 are fixed, and the third and fourth positioning blocks 5 and 6 arranged on the rotating arm 7 can rotate, when the rotating arm 7 is driven to rotate and the third and fourth positioning blocks 5 and 6 are respectively facing the first and second positioning blocks 3 and 4, a roughly closed space is formed between the first and second positioning blocks 3 and 4 and the third and fourth positioning blocks 5 and 6. Thus, one end of the fixed workpiece is clamped and fixed in the closed space, but the closed space cannot clamp both ends of the workpiece at the same time.

[0099] In addition, the rotating arm 7 performs a rotational motion under the driving action of the clamping cylinder 15. Therefore, the first and second positioning blocks 3 and 4 cannot be located on the same side, and the third and fourth positioning blocks 5 and 6 cannot be located on the same side. Because, if the first and second positioning blocks 3 and 4 are located on the same side, and the third and fourth positioning blocks 5 and 6 are also located on the same side, then after the rotating arm 7 rotates to the clamping position, the outer wall of the workpiece is in point contact with the four positioning blocks, which will greatly weaken the stability of the clamping.

[0100] Furthermore, since the rotating arm 7 performs a rotational motion, the sweeping shape of the third and fourth positioning blocks 5 and 6 arranged thereon is fan-shaped. If the first and second positioning blocks 3 and 4 are arranged on the same vertical surface of the connecting plate 2, after the rotating arm 7 rotates to the clamping position, the distance between the third positioning block 5 and the first positioning block 3 is not equal to the distance between the fourth positioning block 6 and the second positioning block 4. The rotating arm 7 and the surface of the connecting plate 2 where the first and second positioning blocks 3 and 4 are arranged are in a V-shape with a larger top and a smaller bottom, which will be difficult to match the shape of the workpiece that actually needs to be clamped. As a result, a pair of positioning blocks located at the bottom that are close to each other clamp the workpiece, while a pair of positioning blocks located at the top that are far apart do not contact the workpiece at all.

[0101] In view of this, an embodiment of the present invention provides a positioning and clamping device, which can realize simultaneous clamping of both ends of a workpiece through a power mechanism, has a better positioning and clamping effect on the workpiece, and is easy to operate.

[0102] In the embodiments of the present invention, for ease of understanding, Figures 1 to 5 The directions of up, down, left, and right are defined as “up”, “down”, “left”, and “right”, respectively. Figure 1 , Figure 2 and Figure 4 , Figure 5 The outward direction of the drawing is defined as "front", Figure 1 , Figure 2 and Figure 4 , Figure 5 The inner direction of the drawing is defined as "rear". Alternatively, Figure 1 , Figure 2 and Figure 4 , Figure 5 The direction of the drawing facing the reader is defined as "front", Figure 1 , Figure 2 and Figure 4 , Figure 5 The direction of the drawing facing away from the reader is defined as "rear". The above definitions of "front" and "rear" directions are Figure 3 The opposite is true.

[0103] It should be understood that the above definitions are for illustrative purposes only and are not to be construed as limitations of the present invention.

[0104] like Figures 1 to 5 As shown, the positioning and clamping device provided in an embodiment of the present invention includes a base 1, a first rod body 2, a second rod body 3, a crank arm 4, a first connecting block 8, a second connecting block 14, a power mechanism 9, a first clamping member 13, a second clamping member 18 and a plurality of connecting rods that connect the above structures in series to achieve mechanical linkage.

[0105] like Figure 1 , Figure 2 and Figure 4 , Figure 5 As shown, the base 1 can be an integral structure, roughly in the shape of a block. In order to conform to the actual working conditions and match the trend of the workpiece to be pressed, the base 1 is in the shape of a block with a larger top and a smaller bottom. Of course, the base 1 can also be a split assembly structure. Specifically, the base 1 can adopt a front and rear Haversian structure, which is connected by two half shells or spliced ​​parts.

[0106] The base 1 is provided with a first channel 101 and a second channel 102. The first channel 101 and the second channel 102 are respectively arranged near the two ends of the base 1, specifically, the first channel 101 is close to the upper end of the base 1, and the second channel 102 is close to the lower end of the base 1. In addition, the first channel 101 and the second channel 102 are arranged substantially in parallel. Thereby, the axial movement of the first rod body 2 and the second rod body 3 arranged in the first channel 101 and the second channel 102 can basically achieve consistency, and then the crank arm 4 arranged at the ends of the first rod body 2 and the second rod body 3 can roughly achieve overall translation.

[0107] The above-mentioned substantially parallel can be understood as: the angle between the axis of the first channel 101 and the axis of the second channel 102 is within the predetermined range [0, φ]. Among them, the upper limit angle φ of the predetermined range can be set according to actual conditions, for example, it can be any value within 3° to 10°, for example, 3°, 4°, 6°, 7°, 8°, 10°, etc., and the embodiment of the present invention does not limit this. When the angle between the axis of the first channel 101 and the axis of the second channel 102 is 0°, the first channel 101 and the second channel 102 are parallel.

[0108] By arranging the first channel 101 and the second channel 102 roughly in parallel, the machining accuracy of the first channel 101 and the second channel 102 can be reduced while the curved arm 4 can roughly achieve overall translation, so that there is a certain tolerance space for the parallel arrangement of the first channel 101 and the second channel 102, thereby reducing the machining difficulty of the first channel 101 and the second channel 102.

[0109] like Figure 4 and Figure 5 As shown, the first channel 101 and the second channel 102 pass through the left and right side walls of the base 1. When the base 1 is an integral structure, the first channel 101 and the second channel 102 are through holes that pass through the left and right side walls of the base 1. When the base 1 is a split assembly structure, the two half shells or splicing parts that constitute the base 1 are each provided with two grooves with a roughly semicircular cross-section on the surface facing each other, for a total of four grooves. The two grooves provided on one half shell or splicing part correspond to the two grooves provided on the other half shell or splicing part. When the two half shells or splicing parts are connected together, the two pairs of grooves are spliced ​​together to form the first channel 101 and the second channel 102, respectively.

[0110] The first rod body 2 and the second rod body 3 are movably disposed in the first channel 101 and the second channel 102, respectively. Moreover, the first rod body 2 and the second rod body 3 can move axially in the first channel 101 and the second channel 102, respectively.

[0111] The cross-sectional shapes of the first rod body 2 and the second rod body 3 are respectively the same as the cross-sectional shapes of the first channel 101 and the second channel 102. For example, when the cross-sectional shapes of the first channel 101 and the second channel 102 are circular as described above, the first rod body 2 and the second rod body 3 can be cylindrical rods with circular cross-sections.

[0112] Of course, the cross-sectional shapes of the first rod body 2 and the second rod body 3 are not limited to the above embodiments. For example, the first rod body 2 and the second rod body 3 may also be prismatic rods with polygonal cross-sections (e.g., quadrilaterals, pentagons, hexagons, octagons, etc.), or other rods with elliptical or irregular cross-sections, which are not limited in the embodiments of the present invention. When the cross-sections of the first rod body 2 and the second rod body 3 are non-circular, the cross-sectional shapes of the first channel 101 and the second channel 102 are also correspondingly the same shape.

[0113] like Figure 4 and Figure 5 As shown, in order to guide the axial movement of the first rod body 2 and the second rod body 3 in the first channel 101 and the second channel 102, a first bushing 19 and a second bushing 20 may be respectively provided in the first channel 101 and the second channel 102, and the first rod body 2 and the second rod body 3 are respectively inserted into the first bushing 19 and the second bushing 20.

[0114] The first bushing 19 and the first channel 101 can be assembled by threaded connection, and the second bushing 20 can be assembled with the second channel 102 by the same method. When the first bushing 19 and the second bushing 20 are respectively assembled into the first channel 101 and the second channel 102, the outer ends of the first bushing 19 and the second bushing 20 are flush with the outer surface of the base 1.

[0115] In order to reduce the friction resistance of the first rod body 2 and the second rod body 3 to axially move in the first channel 101 and the second channel 102, the first bushing 19 and the second bushing 20 may be self-lubricating bushings. Since the first bushing 19 and the second bushing 20 have a wall thickness dimension, the first rod body 2 passing through the first bushing 19 is isolated from the first channel 101 and the second channel 102. Similarly, the second rod body 3 passing through the second bushing 20 is isolated from the second channel 102. Thus, the outer walls of the first rod body 2 and the second rod body 3 are isolated from the inner walls of the first channel 101 and the second channel 102, respectively.

[0116] In this way, with the help of the first bushing 19 and the second bushing 20 with self-lubricating function, while lubricating the axial movement of the first rod body 2 and the second rod body 3 to reduce friction, the outer walls of the first rod body 2 and the second rod body 3 can be prevented from contacting with the inner walls of the first channel 101 and the second channel 102 respectively, thereby preventing friction and scratching between the inner walls of the first channel 101 and the second channel 102 and the outer walls of the first rod body 2 and the second rod body 3, thereby improving the smoothness of the axial movement of the first rod body 2 and the second rod body 3.

[0117] The number of the first bushing 19 and the second bushing 20 can be determined according to the length of the first channel 101 and the second channel 102 and the specifications of the first bushing 19 and the second bushing 20. Figure 4 and Figure 5 As shown, when the base 1 is a block-shaped structure with a larger upper portion and a smaller lower portion, the length of the first channel 101 near the upper end of the base 1 is larger, while the length of the second channel 102 near the lower end of the base 1 is relatively smaller. Then, there may be two first bushings 19 disposed in the first channel 101, and the two first bushings 19 are disposed at the openings at both ends of the first channel 101, respectively. Accordingly, there may be only one second bushing 20 disposed in the second channel 102, and one second bushing 20 may be disposed at the opening at any end of the second channel 102.

[0118] Of course, the number of the first bushing 19 and the second bushing 20 is not limited to the above. In the above embodiment, the specifications (specifically, length) of the first bushing 19 and the second bushing 20 are substantially the same. In practice, the first bushing 19 and the second bushing 20 that match the length of the first channel 101 and the second channel 102 can be selected, and only one first bushing 19 and one second bushing 20 can be respectively provided in the first channel 101 and the second channel 102.

[0119] The first rod body 2 and the second rod body 3 both have two opposite ends: the first rod body 2 has a first end and a second end, and the second rod body 3 has a third end and a fourth end. Figure 4 and Figure 5 The right end, the second end and the fourth end are as shown Figure 4 and Figure 5 Furthermore, the first end and the third end extend to one side (right side) of the base 1 , and the second end and the fourth end extend to the other side (left side) of the base 1 .

[0120] The crank arm 4 is connected to the ends of the first rod body 2 and the second rod body 3 on the same side of the base 1, that is, the crank arm 4 is connected to the first end and the third end. Specifically, it can be a fixed connection achieved by welding, bonding, etc., or a detachable connection achieved by bolt connection, clamping, etc., which is not limited in the embodiment of the present invention.

[0121] The curved arm 4 may be roughly in a multi-section bending shape to adapt to the outer wall trend of the base 1 to avoid interference between the two. The curved arm 4 is provided with a first positioning protrusion 401 and a second positioning protrusion 402, and the first positioning protrusion 401 and the second positioning protrusion 402 are respectively arranged at positions close to both ends of the curved arm 4. Alternatively, the first positioning protrusion 401 and the second positioning protrusion 402 are respectively arranged at both ends of the curved arm 4. Specifically, the first positioning protrusion 401 is arranged at the upper end of the curved arm 4 or at a position close to the upper end, and the second positioning protrusion 402 is arranged at the lower end of the curved arm 4 or at a position close to the lower end.

[0122] In addition, the first positioning protrusion 401 and the second positioning protrusion 402 are located on the same side of the crank arm 4. Specifically, the first positioning protrusion 401 and the second positioning protrusion 402 are arranged on the surface of the crank arm 4 facing away from the base 1, that is, the first positioning protrusion 401 and the second positioning protrusion 402 are both arranged on the right surface of the crank arm 4.

[0123] In this way, since the first positioning convex point 401 and the second positioning convex point 402 are respectively arranged at positions close to the two ends of the crank arm 4, there is a preset distance between the first positioning convex point 401 and the second positioning convex point 402. Through the first pressing convex point 1301 and the second pressing convex point 1802 mentioned below that cooperate with the first positioning convex point 401 and the second positioning convex point 402, the workpiece can be pressed in the length direction. Thereby, one end of the workpiece in the length direction is pressed by the first positioning convex point 401 and the first pressing convex point 1301 that match, and the other end is pressed by the second positioning convex point 402 and the second pressing convex point 1802 that match. In this way, the workpiece is pressed as a whole, the pressing strength is high, and the stability is good.

[0124] In addition, if Figure 2 , Figure 4 and Figure 5 As shown, the crank arm 4 may also be provided with a positioning card 25 for positioning or limiting the workpiece, and the positioning card 25 is located on one side of the first positioning protrusion 401 or the second positioning protrusion 402. Specifically, the positioning card 25 is arranged on the rear surface of the crank arm 4. The positioning card 25 is hook-shaped and is used to stop the workpiece when the workpiece is loaded. Specifically, the workpiece is as follows Figure 2 The left side shown is loaded toward the right side, and when the workpiece contacts the positioning card 25 and is stopped, the workpiece is installed and positioned.

[0125] The first rod body 2 and the second rod body 3 are located at the ends of the other side of the base 1, that is, the second end and the fourth end are respectively rotatably connected to the first connecting rod 5 and the second connecting rod 6. Specifically, the second end is connected to one end of the first connecting rod 5 (such as Figure 1 , Figure 2 and Figure 4 , Figure 5The fourth end is connected to one end of the second connecting rod 6 (as shown in the right end) and the ... Figure 1 , Figure 2 and Figure 4 , Figure 5 right end as shown) swivel connection.

[0126] The specific implementation method of the rotation connection may be hinge connection. The rotation connection between the first connecting rod 5 and the second end of the first rod body 2 is taken as an example for description.

[0127] like Figure 1 As shown, the second end of the first rod body 2 is a flat block, on which a first through hole is provided, and the end portion of the first connecting rod 5 corresponding to the second end (such as Figure 1 A notch is provided at the right end (shown in the figure) for the second end flat block to be inserted, and second through holes are respectively provided on the side walls defining the notch. After the second end flat block is inserted into the notch, the hinge shaft is inserted into the two second through holes and one first through hole. Then the first connecting rod 5 and the second end of the first rod body 2 are rotatably connected, and both can rotate around the hinge shaft (as the pivot shaft).

[0128] It should be noted that this article involves multiple rotational connections. Unless otherwise specified, the specific implementation methods of other rotational connections appearing in this article can refer to the above description and will not be repeated one by one.

[0129] The intermediate link 7 is connected between the first link 55 and the second link 66, and the intermediate link 7 is connected to the first link 55 and the second link 66 in a rotational manner. Figure 1 , Figure 2 and Figure 4 , Figure 5 The upper end shown in FIG. 1 ) and the other end of the first connecting rod 55 (as shown in FIG. Figure 1 , Figure 2 and Figure 4 , Figure 5 The other end of the intermediate connecting rod 7 (as shown in the left end) is rotatably connected. Figure 1 , Figure 2 and Figure 4 , Figure 5 The lower end shown in FIG. 1 ) and the other end of the second connecting rod 66 (as shown in FIG. Figure 1 , Figure 2 and Figure 4 , Figure 5 left end as shown) swivel connection.

[0130] The rotation connection points between the intermediate link 7 and the first link 55 and the second link 66 are defined as a first pivot point 701 and a second pivot point 702 , respectively.

[0131] One end of the first connecting block 8 is rotatably connected to the first pivot point 701, and the other end is rotatably connected to the power mechanism 9. Figure 1 and Figure 2 As shown, the first connection block 8 is roughly in the shape of a long strip of sheet or plate. In order to facilitate the rotational connection with other components, both ends of the first connection block 8 are bent toward the direction of the adjacent components that are rotationally connected thereto.

[0132] For example, the end portion of the first connecting block 8 that is rotatably connected to the first pivot point 701 (eg Figure 1 , Figure 2 and Figure 4 , Figure 5 The right end shown in the figure is slightly bent upward, and the end portion (as shown in the figure) which is rotatably connected to the power mechanism 9 is Figure 1 , Figure 2 and Figure 4 , Figure 5 The left end (shown) is slightly bent downward.

[0133] The first connecting block 8 is rotatably connected to the first pivot point 701, which means that the first connecting block 8, the first connecting rod 5 and the intermediate connecting rod 7 are arranged at the same point and share a hinge axis, and the three can rotate at the shared hinge axis.

[0134] The first connection block 8 has a first rotation fulcrum 801 and a first connection ear 802. The first connection ear 802 is located between the two ends of the first connection block 8, and can be formed by the side wall of the first connection block 8 protruding upward, that is, it is integrally constructed with the first connection block 8, or is a part of the structure of the first connection block 8 itself.

[0135] The first rotation fulcrum 801 is located between the first connecting ear 802 and the first pivot point 701, and the first connecting block 8 can rotate around the first rotation fulcrum 801 under the drive of the power mechanism 9. In addition, the first rotation fulcrum 801 not only provides a fulcrum for the rotation of the first connecting block 8, but also can realize the fixation of the first connecting block 8.

[0136] Specifically, Figure 3 As shown, a fixing plate 21 is provided on the base 1, and the first connecting block 8 is rotatably connected to the fixing plate 21 via a first rotating fulcrum 801. The number of the fixing plate 21 can be one, which is only provided on the front surface or the rear surface of the base 1. The number of the fixing plate 21 can also be two, which are respectively provided on the front surface and the rear surface of the base 1.

[0137] The fixing plate 21 can be detachably arranged on the base 1 by means of screws. Figure 3 As shown, the width of the fixing plate 21 is greater than the width of the base 1, and the heights of the two can be substantially the same. Figure 3The left end shown in the figure is in the same direction as the outer wall of the base 1 facing the curved arm 4 or the curved arm 4, and the left end of the fixing plate 21 is flush with the left end of the base 1.

[0138] In this way, the right end of the fixing plate 21 exceeds the right end of the base 1. When there are two fixing plates 21, the two fixing plates 21 define a right-side open accommodation space at the portion exceeding the right end of the base 1, and the accommodation space can accommodate the first connecting rod 5, the second connecting rod 6, and the middle connecting rod 7. Thus, the above structure can be protected to a certain extent. At the same time, the appearance of the positioning and pressing device of the embodiment of the present invention can be more regular, which plays a role in beautifying the appearance to a certain extent.

[0139] In addition, if Figure 3 and Figure 5 As shown, in order to limit the rotation of the first connection block 8, the fixed plate 21 supports a stopper 25 that cooperates with the first connection block 8. Specifically, a cover plate (not shown) can be provided at the right end of the fixed plate 21, and the stopper 25 is provided on the cover plate. The stopper 25 is located below the first connection block 8, and a soft pad 2501 can be provided on the top of the stopper 25 to achieve flexible contact with the first connection block 8 and achieve buffering.

[0140] Among them, the setting of the stop block 25 can also play a role in enabling the positioning and clamping device of the embodiment of the present invention to accurately reach the clamping state, which will be described in detail below.

[0141] In this embodiment, there is one power mechanism 9, which is used to provide motion power for the entire positioning and clamping device. Therefore, the power mechanism 9 can adopt any suitable existing structure, such as any one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder, and includes a cylinder barrel 901 and a telescopic rod 902. The telescopic rod 902 is rotatably connected to the end of the first connecting block 8, and the first connecting block 8 is driven to rotate around the first rotation fulcrum 801 through the extension and retraction of the telescopic rod 902.

[0142] When the telescopic rod 902 drives the first connecting block 8 to rotate, the cylinder 901 will swing slightly toward or away from the base 1. In order not to suppress the swing of the cylinder 901, the cylinder 901 is designed to have the freedom to swing toward or away from the base 1. The specific implementation method can be that the cylinder 901 is rotatably connected to a base 24.

[0143] One end of the first pressing member 13 is rotatably connected to the first connecting ear 802, and the other end is provided with a first pressing protrusion 1301 that matches the first positioning protrusion 401. Figures 1 to 5As shown, the first pressing member 13 has a third rotation fulcrum 1303 located between the two ends. Similarly, the third rotation fulcrum 1303 can not only serve as a rotation fulcrum of the first pressing member 13, so that the first pressing member 13 can rotate around it under the driving action of the first connecting block 8, but also can realize the fixation of the first pressing member 13, that is, the first pressing member 13 can be rotatably connected to the support through the third rotation fulcrum 1303.

[0144] The support can be any physical structure that can provide strength support for the first clamping member 13, such as a work surface, a cantilever, etc. In fact, the positioning and clamping device of the embodiment of the present invention needs to be fixed during operation, which can be achieved by using a bracket, a fixed frame or a factory wall. The support used to support and fix the first clamping member 13 can be the above-listed structures, or it can be an additional component fixedly connected to the above-listed structures, and the embodiment of the present invention does not limit this.

[0145] Different from the above-mentioned rotational connection, the first pressing member 13 and the support can be rotationally connected via a pin, thereby avoiding interference between the first pressing member 13 and the support during the rotation process as much as possible.

[0146] Furthermore, the cross section of the first clamping member 13 is L-shaped, and has a first bending portion and a second bending portion connected to each other, and the angle between the two bending portions can be 90°. The first bending portion and the second bending portion are preferably integrally constructed, and the first clamping member 13 can be a rod-shaped metal made by bending or sheet metal processing.

[0147] The third rotation fulcrum 1303 is formed at the intersection of the first bending portion and the second bending portion. Since the first pressing member 13 and the support are connected by the oil production pin shaft, in order to improve the connection strength between the two, the rotation connection point of the two should have a sufficient wall thickness. Figure 2 As shown, a roughly circular connecting portion is formed at the intersection of the first bending portion and the second bending portion, and a pin for passing through can be arranged on the circular connecting portion.

[0148] like Figure 4 and Figure 5 As shown, the second connection block 14 may be roughly V-shaped, having two second connection ears 1401 and a second rotation fulcrum 1402 located between the two second connection ears 1401. The second connection block 14 can rotate around the second rotation fulcrum 1402 under the drive of the intermediate connecting rod 7. Similarly, the second rotation fulcrum 1402 not only provides a fulcrum for the rotation of the second connection block 14, but also can realize the fixation of the second connection block 14. The specific implementation method is the same as above, and the second connection block 14 is rotatably connected to the fixing plate 21 through the second rotation fulcrum 1402, which will not be described in detail here.

[0149] One of the second connecting ears 1401 (such as Figure 4 The second connecting ear 1401 shown at the top, Figure 5 The second connecting ear 1401) shown on the right side is rotatably connected to the second pivot point 702. This means that the second connecting block 14, the second connecting rod 6, and the intermediate connecting rod 7 are arranged at the same point, and the three share a hinge axis, and the three can rotate at the common hinge axis.

[0150] Another second connecting ear 1401 (such as Figure 4 The second connecting ear 1401 shown at the lower left, Figure 5 The second connecting ear 1401 on the left side is rotatably connected, and the other end is provided with a second clamping protrusion 1802 that cooperates with the second positioning protrusion 402. Similarly, referring to the above description, the second clamping member 18 has a fourth rotation fulcrum 1804 located between the two ends. The fourth rotation fulcrum 1804 can not only serve as a rotation fulcrum of the second clamping member 18, so that the second clamping member 18 can rotate around it under the driving action of the intermediate connecting rod 7, but also can realize the fixing of the second clamping member 18, that is, the second clamping member 18 can be rotatably connected to the support through the fourth rotation fulcrum 1804.

[0151] The second clamping member 18 has a bent cross-section, and has a third bent portion and a fourth bent portion connected to each other. The angle between the two bent portions may be 150°, and the second rotation fulcrum 1402 is formed at the intersection of the third bent portion and the fourth bent portion.

[0152] In this embodiment, the first positioning protrusion 401 cooperates with the first pressing protrusion 1301 to press one end (upper end) of the workpiece, and the second positioning protrusion 402 cooperates with the second pressing protrusion 1802 to press the other end (lower end) of the workpiece.

[0153] When the positioning and clamping device of the embodiment of the present invention switches from the open state to the clamping state, the first positioning protrusion 401 and the first clamping protrusion 1301 are driven to approach each other, and the second positioning protrusion 402 and the second clamping protrusion 1802 are also driven to approach each other, thereby clamping the two ends of the workpiece. Correspondingly, when the relevant operation on the workpiece (such as welding) is completed, the positioning and clamping device of the embodiment of the present invention switches from the clamping state to the open state, the first positioning protrusion 401 and the first clamping protrusion 1301 are driven to move away from each other, and the second positioning protrusion 402 and the second clamping protrusion 1802 are also driven to move away from each other, thereby releasing the clamping of the workpiece.

[0154] In order to adapt to the clamping requirements of workpieces of different sizes, the first positioning protrusion 401 is designed to be elastically deformable, and includes a body 4011 and a tapered end 4012 disposed on the body 4011. The body 4011 can be roughly rectangular or cylindrical, and the tapered end 4012 can be integrally constructed with the body 4011.

[0155] In addition, the body 4011 can be detachably connected to the crank arm 4 to achieve the replacement of the first positioning protrusions 401 of different specifications (lengths). Figure 2 As shown, the specific implementation method is that a slot opening toward the front end is provided on the crank arm 4, and the bottom end of the body 4011 is inserted into the slot in an interference fit manner.

[0156] The body 4011 is provided with a plurality of deformation grooves 4013 in a staggered manner. The staggered manner can be understood as that the plurality of deformation grooves 4013 are arranged in parallel, and adjacent deformation grooves 4013 open in opposite directions. Figure 4 and Figure 5 As shown, there are two deformation grooves 4013, one of which opens upward and the other opens downward.

[0157] By staggeredly arranging a plurality of deformation grooves 4013 on the body 4011 of the first positioning protrusion 401, when the positioning and clamping device of the embodiment of the present invention is in a clamping state, the body 4011 can undergo axial compression deformation. In this way, workpieces of different specifications can be clamped, and a floating clamping function can be realized. In addition, the compression deformation of the body 4011 can generate a reverse clamping force on the workpiece, thereby increasing the clamping force and improving the clamping effect.

[0158] In the present embodiment, the first clamping protrusion 1301 is arranged on the surface of the first clamping member 13 facing the curved arm 4, and its structure is substantially the same as the first positioning protrusion 401, which will not be described in detail. In addition, in order to further enhance the floating clamping function, the first positioning protrusion 401 and / or the first clamping protrusion 1301 can be made of an elastic material. Specifically, at least one of the first positioning protrusion 401 and the first clamping protrusion 1301 (including any other one, and two) can be made of an elastic material. The elastic material can be a metal material with good elastic deformation performance and toughness, such as spring steel, copper alloy, etc.

[0159] Of course, the elastic material made of the first positioning convex point 401 and / or the first pressing convex point 1301 is not limited to this. In practice, the elastic material made of the first positioning convex point 401 and / or the first pressing convex point 1301 is not limited to this, and any other suitable elastic material, such as polymer material, can also be selected.

[0160] Thereby, the first positioning protrusion 401 and / or the first pressing protrusion 1301 made of elastic material have a certain tolerance, and cooperate with the multiple deformation grooves 4013 set on the first positioning protrusion 401 to further enhance the floating pressing function.

[0161] The number of the second positioning protrusions 402 and the second pressing protrusions 1802 are both two, and the second positioning protrusions 402 and / or the second pressing protrusions 1802 are columnar. Then the other end (lower end) of the workpiece can be clamped between the two columnar second positioning protrusions 402 and / or the second pressing protrusions 1802.

[0162] Thus, when the positioning and pressing device of the embodiment of the present invention is in the pressing state, the ends of the two pairs of corresponding second positioning protrusions 402 and second pressing protrusions 1802 may be in contact with each other or may not be in contact with each other (e.g. Figure 4 As shown, the ends of the second positioning protrusion 402 and the second clamping protrusion 1802 are spaced apart).

[0163] The second positioning protrusion 402 and / or the second pressing protrusion 1802 may be in a columnar shape, which means that at least one of the second positioning protrusion 402 and the second pressing protrusion 1802 may be in a columnar shape. Figure 2 In the illustrated embodiment, the second positioning protrusion 402 is in a flat button shape, and the second pressing protrusion 1802 is in a column shape. Of course, this is not limiting. In other embodiments, the second positioning protrusion 402 can also be in a column shape, and the second pressing protrusion 1802 can be in a flat button shape. Alternatively, the second positioning protrusion 402 and the second pressing protrusion 1802 are both in a column shape.

[0164] According to the above description, the stop block 25 is used to accurately limit the positioning and pressing device of the embodiment of the present invention to a pressing state. Figure 5 In the open state shown in FIG. 1 , the power mechanism 9 operates to drive the first connecting block 8 to rotate. When the first connecting block 8 rotates to contact the stop block 25, the positioning and pressing device is in or reaches the position shown in FIG. Figure 4 The compressed state is shown.

[0165] Figure 4 and Figure 5 As shown, in this embodiment, when the power mechanism 9 is located below the first connection block 8, the power mechanism 9 needs to perform a shortening operation so that the first connection block 8 is driven to rotate toward the stop block 25. Specifically, the telescopic rod 902 of the power mechanism 9 retracts into the cylinder 901, and the first connection block 8 is driven by the telescopic rod 902 to perform the following operation. Figure 4 and Figure 5 Counterclockwise rotation as indicated.

[0166] Of course, when the power mechanism 9 is located above the first connection block 8 and the first connection block 8 wants to rotate toward the stop block 25 , the power mechanism 9 needs to perform an extension operation.

[0167] In this embodiment, when the first connection block 8 contacts the stop block 25, the positioning and clamping device is in a clamping state. Alternatively, when the first connection block 8 contacts the stop block 25, the telescopic rod 902 of the power mechanism 9 is completely retracted into the cylinder 901. That is, when the telescopic rod 902 of the power mechanism 9 is completely retracted into the cylinder 901, the positioning and clamping device just reaches the clamping state.

[0168] While the positioning and clamping device is in the Figure 4 When the first connecting block 8 rotates to a preset position where it is disengaged from the stop block 25, the positioning and pressing device is in or reaches the position shown in FIG. Figure 5 Shown in open state.

[0169] Similarly, when the power mechanism 9 is located below the first connection block 8, the power mechanism 9 needs to perform an extension operation so that the first connection block 8 is driven to rotate in a direction away from the stop block 25. Specifically, when the telescopic rod 902 of the power mechanism 9 extends from the cylinder 901, the first connection block 8 is driven by the telescopic rod 902 to perform the following operation: Figure 4 and Figure 5 Clockwise rotation indicated.

[0170] Of course, when the power mechanism 9 is located above the first connection block 8 and the first connection block 8 wants to rotate away from the stop block 25 , the power mechanism 9 needs to perform a shortening operation.

[0171] The working principle of the positioning and pressing device according to the embodiment of the present invention is described below:

[0172] like Figure 5 As shown, when the operation starts, the telescopic rod 902 of the power mechanism 9 is in an extended state. At this time, the positioning and clamping device of the embodiment of the present invention is in an open state. After the workpiece is loaded, the power mechanism 9 is operated to retract its telescopic rod 902 into the cylinder 901. At this time, the positioning and clamping device switches from an open state to a clamped state. Specifically, the telescopic rod 902 drives the first connecting block 8 to rotate around the first rotating fulcrum 801, and the first rod body 2 rotatably connected to the first connecting block 8 through the first connecting rod 5 is driven in the first channel 101 in a direction away from the power mechanism 9 (such as Figure 4 and Figure 5 The second rod body 3, which is rotatably connected to the middle link 7 through the second link 6, is also driven in the second channel 102 in a direction away from the power mechanism 9. Figure 4As shown, when the first connecting block 8 rotates counterclockwise until it touches the stop block 25, the positioning and clamping device reaches the clamping state. Subsequently, relevant operations (such as welding) can be performed on the clamped workpiece.

[0173] After the relevant operations on the workpiece are completed, the power mechanism 9 is operated to extend the telescopic rod 902 from the cylinder 901, and the positioning and clamping device is switched from the clamping state to the open state. The specific process is opposite to the above. Then, the workpiece can be taken out.

[0174] The above working principle is described by taking the case where the power mechanism 9 is located below the first connection block 8 as an example. When the power mechanism 9 is located above the first connection block 8, the working principle is substantially similar, except that the operation performed by the telescopic rod 902 of the power mechanism 9 is just opposite to the above example, which will not be described in detail here.

[0175] In the embodiment of the present invention, the middle connecting rod 7 plays the role of transmitting power. Since the embodiment of the present invention needs to solve the problem that only one power mechanism 9 can complete the movement of the two rods and the clamping member, the middle connecting rod 7 needs to transmit the driving force of the power mechanism 9 to the second rod 3 and the second clamping member 18 which are not directly connected to the first connecting block 8.

[0176] like Figure 4 and Figure 5 As shown, in order to achieve synchronous movement of the first rod body 2 and the second rod body 3, the intermediate rod body has a special structural design. Specifically, the position of the intermediate link 7 close to the second link 6 is raised toward the direction of the base 1 (towards the right), and the first pivot point 701 and the second pivot point 702 are located on the same vertical line. In this way, the portion of the intermediate link 7 between the raised portion and the first pivot point 701 is inclined toward the direction of the base 1.

[0177] Thus, when the power mechanism 9 drives the first connecting block 8 to rotate counterclockwise, the end (right end) of the first connecting block 8 connected to the intermediate connecting rod 7 is lifted, and the intermediate connecting rod 7 is driven to move upward. At this time, the left end of the first connecting rod 5 connected to the first connecting block 8 and the intermediate connecting rod 7 at the first pivot point 701 is fan-shaped and slightly lifted from bottom to top, and the first rod body 2 connected to the first connecting rod 5 is driven to move rightward.

[0178] The upward movement of the intermediate link 7 will drive the second connecting block 14 connected thereto to rotate counterclockwise. Similarly, the left end of the second connecting rod 6 connected to the second connecting block 14 and the intermediate link 7 at the second pivot point 702 is fan-shaped and slightly raised from bottom to top. Since the intermediate link 7 is raised toward the base 1 at the position close to the second connecting rod 6, and the first pivot point 701 and the second pivot point 702 are located on the same vertical line, the intermediate link 7 can appropriately speed up the lifting speed of the second connecting rod 6 to compensate for the possible movement speed hysteresis due to the longer power transmission path of the second connecting rod 6 than the first connecting rod 5. In addition, it can be ensured that the speed at which the second rod body 3 connected to the second connecting rod 6 is driven to move to the right is roughly the same as the speed at which the first rod body 2 moves to the right.

[0179] In addition, in order to lock the positioning and clamping device when it is in a clamping state and avoid rotation between the multiple links which may cause the workpiece clamping effect to fail, the embodiment of the present invention provides a corresponding structure for locking the positioning and clamping device.

[0180] Specifically, the first connecting ear 802 is rotatably connected to one end of the third connecting rod 10, and the other end of the third connecting rod 10 is rotatably connected to the first pressing member 13 through the first locking mechanism S1. Figure 4 and Figure 5 The connecting ear (shown at the lower left) is rotatably connected to one end of the fifth connecting rod 15, and the other end of the fifth connecting rod 15 is rotatably connected to the second pressing member 18 through the second locking mechanism S2.

[0181] That is, the first connecting ear 802 is rotatably connected to the first pressing member 13 through the third connecting rod 10 and the first locking mechanism S1, and the other second connecting ear 1401 is rotatably connected to the second pressing member 18 through the fifth connecting rod 15 and the second locking mechanism S2. The fifth connecting rod 15 is provided with an escape groove 1501, and the escape groove 1501 is provided for the end (lower end) of the intermediate connecting rod 7 to be embedded when the positioning and pressing device is in the open state, so that the intermediate connecting rod 7 has a sufficient stroke.

[0182] When the positioning and clamping device is in the clamping state, the first locking mechanism S1 limits the first clamping member 13 to the current position, and the second locking mechanism S2 limits the second clamping member 18 to the current position. Specifically, when the positioning and clamping device is in the clamping state, when the power mechanism 9 does not apply a force to the first connecting block 8, the first locking mechanism S1 can keep the first clamping member 13 at the current position without changing, and the second locking mechanism S2 can keep the second clamping member 18 at the current position without changing.

[0183] In order to achieve the above purpose, the first locking mechanism S1 has a first connection point S11 rotatably connected to the base 1, a second connection point S12 rotatably connected to the first pressing member 13, and a first intermediate connection point S13 located between the first connection point S11 and the second connection point S12. The first locking mechanism S1 itself can rotate around the first intermediate connection point S13. That is, the first locking mechanism S1 can be divided into two parts from the first intermediate connection point S13, and the two parts have the freedom to rotate around the first intermediate connection point S13.

[0184] When the positioning and clamping device is in the clamping state, the first clamping member 13 applies a clamping force to the workpiece, and the workpiece applies a reverse force to the first clamping member 13. Similarly, the reverse force is further applied to or transmitted to the first locking mechanism S1 through the first clamping member 13. The torque generated by the reaction force applied by the first clamping member 13 to the first locking mechanism S1 at the first intermediate connection point S13 is zero.

[0185] In this way, the two parts of the first locking mechanism S1 divided by the first intermediate connection point S13 will not rotate at the first intermediate connection point S13. In this way, the first locking mechanism S1 itself does not rotate, but maintains the current supporting state for the first pressing member 13. Therefore, the first pressing member 13 is limited to remain unchanged at the current position.

[0186] Specifically, the first locking mechanism S1 includes a first intermediate connecting block 11 and a fourth connecting rod 12, or, in other words, the first intermediate connecting block 11 and the fourth connecting rod 12 constitute the first locking mechanism S1. The first intermediate connecting block 11 has a first intermediate connecting ear 1101 rotatably connected to the other end of the third connecting rod 10, and the first intermediate connecting ear 1101 is located between the two ends of the first intermediate connecting block 11. One end of the first intermediate connecting block 11 is rotatably connected to the base 1, and the other end is rotatably connected to one end of the fourth connecting rod 12, and the other end of the fourth connecting rod 12 is rotatably connected to the first clamping member 13.

[0187] The cross section of the first intermediate connection block 11 is roughly in the shape of a "convex" character, and the first intermediate connection ear 1101 can be formed by protruding upward at its upper end. One end of the first intermediate connection block 11 can be rotatably connected to the base 1 through a first connection seat 22 arranged at the top of the base 1.

[0188] The rotation connection point between the first intermediate connection block 11 and the base 1 can be the first connection point S11, the rotation connection point between the fourth connecting rod 12 and the first pressing member 13 can be the second connection point S12, and the rotation connection point between the first intermediate connection block 11 and the fourth connecting rod 12 can be the first intermediate connection point S13. The rotation connection point between the third connecting rod 10 and the first intermediate connection block 11 is not on the same straight line as the first connection point S11 and the second connection point S12. Figure 4As shown, when the first connection point S11, the second connection point S12 and the first intermediate connection point S13 are located on the same straight line, the positioning and clamping device is in a clamping state.

[0189] In this way, the reaction force applied by the first pressing member 13 to the first locking mechanism S1 is sequentially transmitted to the base 1 via the fourth connecting rod 12 and the first intermediate connecting block 11. Since the first connecting point S11, the second connecting point S12 and the first intermediate connecting point S13 are located on the same straight line, the reaction force will not cause the fourth connecting rod 12 and the first intermediate connecting block 11 to twist at the first intermediate connecting point S13. Thus, the first locking mechanism S1 maintains the support state for the first pressing member 13, and the first pressing member 13 is limited to remain unchanged at the current position.

[0190] Therefore, the first locking mechanism S1 has a locking position and an unlocking position, which correspond to Figure 4 and Figure 5 As shown in the location. Figure 4 As shown, when the first locking mechanism S1 is in the locking position, the first connection point S11, the second connection point S12 and the first intermediate connection point S13 are located on the same straight line, that is, the two end points of the first intermediate connection block 11 and the rotation connection point between the fourth connecting rod 12 and the first clamping member 13 are located on the same straight line. At this time, the positioning and clamping device is in a clamping state. That is, when the first locking mechanism S1 is in the locking position, the positioning and clamping device is in a clamping state.

[0191] like Figure 5 As shown, when the first locking mechanism S1 is in the unlocked position, the first connection point S11, the second connection point S12 and the first intermediate connection point S13 are not on the same straight line, that is, the two end points of the first intermediate connection block 11 and the rotation connection point between the fourth connecting rod 12 and the first pressing member 13 are not on the same straight line. At this time, the positioning and pressing device is in the open state. That is, when the first locking mechanism S1 is in the unlocked position, the positioning and pressing device is in the open state.

[0192] Similarly, the second locking mechanism S2 has a third connection point S23 rotatably connected to the base 1, a fourth connection point S24 rotatably connected to the second pressing member 18, and a second intermediate connection point S22 located between the third connection point S23 and the fourth connection point S24. The second locking mechanism S2 itself can rotate around the second intermediate connection point S22. When the positioning and pressing device is in the clamping state, the reaction force applied by the second pressing member 18 to the second locking mechanism S2 generates a zero torque at the second intermediate connection point S22.

[0193] The second locking mechanism S2 includes a second intermediate connecting block 16 and a sixth connecting rod 17. The second intermediate connecting block 16 has a second intermediate connecting ear 1602 rotatably connected to the other end of the fifth connecting rod 15, and the second intermediate connecting ear 1602 is located between the two ends of the second intermediate connecting block 16. One end of the second intermediate connecting block 16 is rotatably connected to the base 1 (specifically, one end of the first intermediate connecting block 11 can be rotatably connected to the base 1 through a second connecting seat 23 disposed at the bottom end of the base 1), and the other end is rotatably connected to one end of the sixth connecting rod 17, and the other end of the sixth connecting rod 17 is rotatably connected to the second pressing member 18.

[0194] The rotation connection point between the second intermediate connection block 16 and the base 1 is the third connection point S23, the rotation connection point between the sixth connecting rod 17 and the second pressing member 18 is the fourth connection point S24, and the rotation connection point between the second intermediate connection block 16 and the sixth connecting rod 17 is the second intermediate connection point S22. The rotation connection point between the fifth connecting rod 15 and the second intermediate connection block 16 is not on the same straight line as the third connection point S23 and the fourth connection point S24. When the positioning and pressing device is in the pressing state, the third connection point S23, the fourth connection point S24 and the second intermediate connection point S22 are located on the same straight line.

[0195] The second locking mechanism S2 also has a locking position and an unlocking position, which also correspond to Figure 4 and Figure 5 As shown in the location. Figure 4 As shown, when the second locking mechanism S2 is in the locked position, the third connection point S23, the fourth connection point S24 and the second intermediate connection point S22 are located on the same straight line, that is, the two end points of the second intermediate connection block 16 and the rotation connection point between the sixth connecting rod 17 and the second pressing member 18 are located on the same straight line. At this time, the positioning and pressing device is in a pressing state. That is, when the second locking mechanism S2 is in the locked position, the positioning and pressing device is in a pressing state.

[0196] like Figure 5 As shown, when the second locking mechanism S2 is in the unlocked position, the third connection point S23, the fourth connection point S24 and the second intermediate connection point S22 are not on the same straight line, that is, the two end points of the second intermediate connection block 16 and the rotation connection point between the sixth connecting rod 17 and the second pressing member 18 are not on the same straight line. At this time, the positioning and pressing device is in the open state. That is, when the second locking mechanism S2 is in the unlocked position, the positioning and pressing device is in the open state.

[0197] The positioning and pressing device of the embodiment of the present invention can achieve positioning and pressing to reach the dead point at the same time. That is, when the power mechanism 9 moves to the first predetermined position, the first locking mechanism S1 and the second locking mechanism S2 reach the locking position at the same time. Alternatively, when the first connection point S11, the second connection point S12 and the first intermediate connection point S13 move to be located on the same straight line, the third connection point S23, the fourth connection point S24 and the second intermediate connection point S22 move to be located on the same straight line at the same time.

[0198] Therefore, when the first locking mechanism S1 and the second lock are in the locked position, the positioning and clamping device is in a clamped state. Alternatively, it can be said that the clamped state of the positioning and clamping device is the result of the first locking mechanism S1 and the second lock being in the locked position at the same time.

[0199] The first predetermined position may be a position where the telescopic rod 902 is completely retracted into the cylinder 901 , or may be a position where the first connecting block 8 described above rotates to contact the stop block 25 .

[0200] When the power mechanism 9 moves from the first predetermined position to the second predetermined position, the first locking mechanism S1 and the second locking mechanism S2 are simultaneously switched from the locked position to the unlocked position. When the first locking mechanism S1 and the second lock are in the unlocked position, the positioning and clamping device is in an open state. Alternatively, when the first connection point S11, the second connection point S12 and the first intermediate connection point S13 are not on the same straight line, and the third connection point S23, the fourth connection point S24 and the second intermediate connection point S22 are not on the same straight line, the positioning and clamping device is in an open state.

[0201] The second predetermined position may be a position where the telescopic rod 902 at least partially extends from the cylinder 901 , or may be a position where the first connecting block 8 described above rotates and disengages from the stop block 25 .

[0202] The positioning and clamping device of the embodiment of the present invention is provided with a first channel 101 and a second channel 102 in the base 1, and a first rod body 2 and a second rod body 3 are inserted in the first channel 101 and the second channel 102 and can move therein, and the ends of the first rod body 2 and the second rod body 3 located on the same side of the base 1 are connected to a crank arm 4 provided with a first positioning protrusion 401 and a second positioning protrusion 402. The crank arm 4 can be translated by a multi-link driven by a power mechanism 9. The multi-link can also drive the first clamping member 13 and the second clamping member 18 to rotate toward or away from the first positioning protrusion 401 and the second positioning protrusion 402 under the drive of the power mechanism 9, so as to realize the first clamping protrusion 1301 and the second clamping protrusion 1802 provided on the first clamping member 13 and the second clamping member 18 respectively cooperate with the first positioning protrusion 401 and the second positioning protrusion 402. Thus, the first positioning convex point 401 and the first pressing convex point 1301 that match each other press one end of the workpiece, and the second positioning convex point 402 and the second pressing convex point 1802 that match each other press the other end of the workpiece. Thus, the two ends of the workpiece are simultaneously positioned and pressed by a power mechanism 9.

[0203] Therefore, in practice, only one power mechanism 9 needs to be controlled to quickly complete the positioning and clamping of both ends of the workpiece, without having to consider the problem that the two ends of the workpiece cannot be positioned and clamped at the same time due to the different actions of multiple power mechanisms 9. Therefore, the positioning and clamping effect of the workpiece is better and the operation is simple.

[0204] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0205] Any numerical value cited herein includes all values ​​of lower and upper values ​​that increase by one unit from the lower limit to the upper limit, and there is at least a two-unit interval between any lower value and any higher value. For example, if the value of the quantity of a component or process variable (such as temperature, pressure, time, etc.) is stated to be from 1 to 90, preferably from 21 to 80, more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in this specification. For values ​​less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be clearly expressed, and it can be considered that all possible combinations of numerical values ​​listed between the lowest value and the highest value are clearly stated in this specification in a similar manner.

[0206] Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0207] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A positioning and pressing device, characterized in that: include: The base is provided with a first channel and a second channel; the first channel and the second channel are respectively provided with a movable first rod body and a movable second rod body; the ends of the first rod body and the second rod body on the same side of the base are connected to a crank arm, and the crank arm is provided with a first positioning convex point and a second positioning convex point; the ends of the first rod body and the second rod body on the other side of the base are respectively rotatably connected to the first connecting rod and the second connecting rod; An intermediate connecting rod, two ends of which are rotatably connected to the first connecting rod and the second connecting rod respectively; the rotational connection points of the intermediate connecting rod and the first connecting rod and the second connecting rod are the first pivot point and the second pivot point respectively; A first connecting block having a first rotation fulcrum and a first connecting ear, wherein the first connecting ear is located between two ends of the first connecting block, and the first rotation fulcrum is located between the first connecting ear and the first pivot point; one end of the first connecting block is rotationally connected to the first pivot point, and the other end is rotationally connected to the power mechanism; the first connecting block can rotate around the first rotation fulcrum under the drive of the power mechanism; A first pressing member, one end of which is rotatably connected to the first connecting ear, and the other end of which is provided with a first pressing protrusion matched with the first positioning protrusion; The second connecting block has two second connecting ears and a second rotation fulcrum located between the two second connecting ears, wherein one of the second connecting ears is rotationally connected to the second pivot point; the second connecting block can rotate around the second rotation fulcrum under the drive of the intermediate connecting rod; The second pressing piece has one end rotatably connected with another second connecting ear, and the other end is provided with a second pressing protrusion matched with the second positioning protrusion.

2. The positioning and pressing device according to claim 1, characterized in that: A first bushing is arranged in the first channel, and the first rod body passes through the first bushing.

3. The positioning and pressing device according to claim 2, characterized in that: The first bushing is a self-lubricating bushing, and the outer wall of the first rod body is isolated from the inner wall of the first channel.

4. The positioning and pressing device according to claim 1, characterized in that: A second bushing is arranged in the second channel, and the second rod body passes through the second bushing.

5. The positioning and pressing device according to claim 4, characterized in that: The second bushing is a self-lubricating bushing, and the outer wall of the second rod body is isolated from the inner wall of the second channel.

6. The positioning and pressing device according to claim 1, characterized in that: The first positioning protrusion and the second positioning protrusion are located on the same side of the crank arm.

7. The positioning and pressing device according to claim 1, characterized in that: The first positioning protrusion and the second positioning protrusion are arranged on the surface of the crank arm facing away from the base.

8. The positioning and pressing device according to claim 1, characterized in that: The first positioning protrusion and the second positioning protrusion are respectively arranged at positions close to two ends of the crank arm.

9. The positioning and pressing device according to claim 1, characterized in that: The first positioning protrusion comprises a body and a conical end head arranged on the body, and a plurality of deformation grooves are arranged on the body in a staggered manner.

10. The positioning and pressing device according to claim 1, characterized in that: The first positioning protrusion and / or the first pressing protrusion are made of elastic material.

11. The positioning and pressing device according to claim 1, characterized in that: The number of the second positioning protrusions and the number of the second pressing protrusions are both two, and the second positioning protrusions and / or the second pressing protrusions are columnar.

12. The positioning and pressing device according to claim 1, characterized in that: A positioning card for positioning or limiting the workpiece is arranged on the crank arm, and the positioning card is located on one side of the first positioning convex point or the second positioning convex point.

13. The positioning and pressing device according to claim 1, characterized in that: A fixing plate is arranged on the base; the first connecting block is rotatably connected to the fixing plate via a first rotating fulcrum, and the second connecting block is rotatably connected to the fixing plate via a second rotating fulcrum.

14. The positioning and pressing device according to claim 1, characterized in that: The first pressing member has a third rotation fulcrum located between the two ends, and the first pressing member is rotatably connected to the support through the third rotation fulcrum.

15. The positioning and pressing device according to claim 14, characterized in that: The first pressing member has an L-shaped cross section and has a first bending portion and a second bending portion. The third rotation fulcrum is formed at the intersection of the first bending portion and the second bending portion.

16. The positioning and pressing device according to claim 1, characterized in that: The second pressing member has a fourth rotation fulcrum located between the two ends, and the second pressing member is rotationally connected to the support through the fourth rotation fulcrum.

17. The positioning and pressing device according to claim 1, characterized in that: The second pressing member has a third bending portion and a fourth bending portion connected to each other, and the second rotation fulcrum is formed at the intersection of the third bending portion and the fourth bending portion.

18. The positioning and pressing device according to claim 1, characterized in that: The first connecting ear is rotatably connected to one end of the third connecting rod, and the other end of the third connecting rod is rotatably connected to the first pressing member through the first locking mechanism; When the positioning and clamping device is in the clamping state, the first locking mechanism limits the first clamping member to the current position.

19. The positioning and pressing device according to claim 18, characterized in that: The first locking mechanism comprises a first connection point rotatably connected to the base, a second connection point rotatably connected to the first pressing member, and a first intermediate connection point located between the first connection point and the second connection point; the first locking mechanism itself can rotate around the first intermediate connection point; When the positioning and clamping device is in a clamping state, the torque generated by the reaction force applied by the first clamping member to the first locking mechanism at the first intermediate connection point is zero.

20. The positioning and pressing device according to claim 18, characterized in that: The first locking mechanism includes a first intermediate connecting block and a fourth connecting rod; the first intermediate connecting block has a first intermediate connecting ear rotatably connected to the other end of the third connecting rod, and the first intermediate connecting ear is located between the two ends of the first intermediate connecting block; one end of the first intermediate connecting block is rotatably connected to the base, and the other end is rotatably connected to one end of the fourth connecting rod, and the other end of the fourth connecting rod is rotatably connected to the first clamping member.

21. The positioning and pressing device according to claim 20, characterized in that: The rotation connection point between the first intermediate connection block and the base is the first connection point, the rotation connection point between the fourth connecting rod and the first pressing member is the second connection point, and the rotation connection point between the first intermediate connection block and the fourth connecting rod is the first intermediate connection point; When the positioning and clamping device is in a clamping state, the first connection point, the second connection point and the first intermediate connection point are located on the same straight line.

22. The positioning and pressing device according to claim 21, characterized in that: The rotation connection point between the third connecting rod and the first intermediate connecting block is not on the same straight line as the first connection point and the second connection point.

23. The positioning and pressing device according to claim 18, characterized in that: Another second connecting ear is rotatably connected to one end of the fifth connecting rod, and the other end of the fifth connecting rod is rotatably connected to the second pressing member through a second locking mechanism; When the positioning and pressing device is in the pressing state, the second locking mechanism limits the second pressing member to the current position.

24. The positioning and pressing device according to claim 23, characterized in that: The second locking mechanism has a third connection point rotatably connected to the base, a fourth connection point rotatably connected to the second pressing member, and a second intermediate connection point located between the third connection point and the fourth connection point; the second locking mechanism itself can rotate around the second intermediate connection point; When the positioning and clamping device is in the clamping state, the torque generated by the reaction force applied by the second clamping member to the second locking mechanism at the second intermediate connection point is zero.

25. The positioning and pressing device according to claim 23, characterized in that: The second locking mechanism includes a second intermediate connecting block and a sixth connecting rod; the second intermediate connecting block has a second intermediate connecting ear rotatably connected to the other end of the fifth connecting rod, and the second intermediate connecting ear is located between the two ends of the second intermediate connecting block; one end of the second intermediate connecting block is rotatably connected to the base, and the other end is rotatably connected to one end of the sixth connecting rod, and the other end of the sixth connecting rod is rotatably connected to the second clamping member.

26. The positioning and pressing device according to claim 25, characterized in that: The rotation connection point between the second intermediate connection block and the base is the third connection point, the rotation connection point between the sixth connecting rod and the second pressing member is the fourth connection point, and the rotation connection point between the second intermediate connection block and the sixth connecting rod is the second intermediate connection point; When the positioning and clamping device is in a clamping state, the third connection point, the fourth connection point and the second middle connection point are located on the same straight line.

27. The positioning and pressing device according to claim 26, characterized in that: The rotation connection point between the fifth connecting rod and the second middle connecting block is not on the same straight line as the third connection point and the fourth connection point.

28. The positioning and pressing device according to claim 23, characterized in that: The fifth connecting rod is provided with an avoidance groove, and the avoidance groove is used for the end of the intermediate connecting rod to be embedded when the positioning and clamping device is in the open state.

29. The positioning and pressing device according to claim 1, characterized in that: The power mechanism is any one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder, and includes a cylinder barrel and a telescopic rod; wherein the cylinder barrel has the freedom to swing toward or away from the base, and the telescopic rod is rotationally connected to the end of the first connecting block.

30. The positioning and pressing device according to claim 1, characterized in that: The positioning and pressing device is also provided with a stop block cooperating with the first connecting block; When the power mechanism drives the first connecting block to rotate until the first connecting block contacts the stop block, the positioning and clamping device is in a clamping state; When the power mechanism drives the first connecting block to rotate until the first connecting block is located at a preset position where it is disengaged from the stop block, the positioning and clamping device is in an open state.

31. The positioning and pressing device according to claim 1, characterized in that: The position of the middle link close to the second link bulges toward the base, and the first pivot point and the second pivot point are located on the same vertical line; the portion of the middle link between the bulge and the first pivot point is inclined toward the base.

32. A positioning and pressing device, characterized in that: include: The base is provided with a first channel and a second channel; a first rod body and a second rod body are movably inserted in the first channel and the second channel respectively; the first rod body has a first end and a second end opposite to each other, and the second rod body has a third end and a fourth end opposite to each other; the first end and the third end are located on one side of the base, and the second end and the fourth end are located on the other side of the base; the first end and the third end are connected to a curved arm, and a first positioning protrusion and a second positioning protrusion are provided on the curved arm; a first connecting rod, rotatably connected to the second end; a second connecting rod, rotatably connected to the fourth end; An intermediate connecting rod, two ends of which are rotatably connected to the first connecting rod and the second connecting rod respectively; The rotation connection points of the intermediate link and the first link and the second link are respectively the first pivot point and the second pivot point; A first connecting block having a first rotation fulcrum and a first connecting ear, wherein the first connecting ear is located between two ends of the first connecting block, and the first rotation fulcrum is located between the first connecting ear and the first pivot point; one end of the first connecting block is rotationally connected to the first pivot point, and the other end is rotationally connected to the power mechanism; the first connecting block can rotate around the first rotation fulcrum under the drive of the power mechanism; A third connecting rod, one end of which is rotatably connected to the first connecting ear; A first intermediate connecting block having a first intermediate connecting ear, the first intermediate connecting ear being located between two ends of the first intermediate connecting block; the first intermediate connecting ear being rotatably connected to the other end of the third connecting rod; one end of the first intermediate connecting block being rotatably connected to the top end of the base, and the other end being rotatably connected to one end of the fourth connecting rod; A first pressing member, one end of which is rotatably connected to the other end of the fourth connecting rod, and the other end of which is provided with a first pressing protrusion matched with the first positioning protrusion; The second connecting block has two second connecting ears and a second rotation fulcrum located between the two second connecting ears, wherein one of the second connecting ears is rotationally connected to the second pivot point, and the other second connecting ear is rotationally connected to one end of the fifth connecting rod; the second connecting block can rotate around the second rotation fulcrum under the drive of the middle connecting rod; A second intermediate connecting block having a second intermediate connecting ear, the second intermediate connecting ear being located between two ends of the second intermediate connecting block; the second intermediate connecting ear being rotatably connected to the other end of the fifth connecting rod; one end of the second intermediate connecting block being rotatably connected to the bottom end of the base, and the other end being rotatably connected to one end of the sixth connecting rod; The second pressing member has one end rotatably connected to the other end of the sixth connecting rod, and the other end is provided with a second pressing protrusion matched with the second positioning protrusion.

33. The positioning and pressing device according to claim 32, characterized in that: The first middle connecting block and the fourth connecting rod constitute a first locking mechanism, and the second middle connecting block and the sixth connecting rod constitute a second locking mechanism; When the first locking mechanism is in the locking position, two end points of the first intermediate connecting block and the rotation connection point between the fourth connecting rod and the first pressing member are located on the same straight line; When the second locking mechanism is in the locking position, two end points of the second intermediate connecting block and the rotation connection point between the sixth connecting rod and the second pressing member are located on the same straight line; When the power mechanism moves to the first predetermined position, the first locking mechanism and the second locking mechanism reach the locking position simultaneously.

34. The positioning and pressing device according to claim 33, characterized in that: The power mechanism is any one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder, and includes a cylinder barrel and a telescopic rod; The first predetermined position is when the telescopic rod is completely retracted into the cylinder.

35. The positioning and pressing device according to claim 33, characterized in that: When the first locking mechanism and the second lock are in the locked position, the positioning and clamping device is in a clamped state.

36. The positioning and pressing device according to claim 34, characterized in that: When the first locking mechanism is in the unlocking position, the two end points of the first intermediate connecting block and the rotation connection point of the fourth connecting rod and the first pressing member are not on the same straight line; When the second locking mechanism is in the unlocking position, the two end points of the second intermediate connecting block and the rotation connection point of the sixth connecting rod and the second pressing member are not on the same straight line; When the power mechanism moves from the first predetermined position to the second predetermined position, the first locking mechanism and the second locking mechanism are simultaneously switched from the locking position to the unlocking position.

37. The positioning and pressing device according to claim 36, characterized in that: The second predetermined position is when the telescopic rod at least partially extends from the cylinder.

38. The positioning and pressing device according to claim 35, characterized in that: When the first locking mechanism and the second lock are in the unlocked position, the positioning and clamping device is in an open state.

Images