Clamp

Abstract

The invention discloses a clamp, and belongs to the technical field of clamping devices. The clamp is used for clamping a workpiece and comprises a mounting seat; the clamping assembly is mounted on the mounting seat; the limiting mechanism is mounted on the mounting seat; the driving part is mounted on the mounting seat and is used for driving the clamping assembly and the limiting mechanism to move, so that the clamping assembly can be switched between a clamping position and a loosening position, the clamping position is close to the mounting seat, and a clamping cavity for clamping a workpiece is defined by the clamping assembly and the mounting seat, and the loosening position is used for loosening the workpiece; the limiting mechanism can be switched between a stretching-in position in the workpiece to position the workpiece and a stretching-out position in the workpiece; the limiting mechanism is located at the stretching-in position under the condition that the clamping assembly is located at the clamping position, and the limiting mechanism is located at the stretching-out position under the condition that the clamping assembly is located at the loosening position. The clamp has the advantages of being compact in structure, small in occupied space, high in clamping efficiency and the like.

Description

Technical Field

[0001] This application belongs to the technical field of clamping devices, and particularly relates to a fixture. Background Art

[0002] During the automobile manufacturing process, it is necessary to use tooling to position two parts to be welded on the vehicle body to ensure the relative dimensional accuracy between the parts.

[0003] For example, when welding a U-shaped part and a crossbeam, it is necessary to clamp the U-shaped part and the crossbeam through tooling so that the relative position between the U-shaped part and the crossbeam meets the requirements.

[0004] In the related art, the fixture for clamping the U-shaped part is relatively large in volume, occupying the working space of the welding torch, which is not convenient for the welding work of the U-shaped part and the crossbeam. Summary of the Invention

[0005] This application aims to at least solve to some extent the technical problem of the relatively large volume of the fixture for clamping parts. For this purpose, this application provides a fixture.

[0006] An embodiment of this application provides a fixture for clamping a workpiece, including:

[0007] A mounting base;

[0008] A clamping assembly mounted on the mounting base;

[0009] A limiting mechanism mounted on the mounting base;

[0010] A driving member mounted on the mounting base for driving the clamping assembly and the limiting mechanism to move, so that the clamping assembly can switch between a clamping position close to the mounting base and enclosing with the mounting base to form a clamping cavity for clamping the workpiece and a releasing position for releasing the workpiece; and enabling the limiting mechanism to switch between an extending position located inside the workpiece to position the workpiece and a protruding position located outside the workpiece; and under the condition that the clamping assembly is in the clamping position, the limiting mechanism is in the extending position, and under the condition that the clamping assembly is in the releasing position, the limiting mechanism is in the protruding position.

[0011] In some embodiments, the limiting mechanism includes:

[0012] A pin box mounted on the output end of the driving member;

[0013] A positioning pin slidably connected to the mounting base along its axial direction and cooperating with the inclined surface of the pin box.

[0014] In some embodiments, the mounting base includes:

[0015] The first mounting seat, to which both the clamping assembly and the driving member are mounted;

[0016] The second mounting seat, which is mounted on the first mounting seat and has a mounting cavity and a mounting hole communicating with the mounting cavity. The pin box is arranged in the mounting cavity, and the positioning pin is arranged in the mounting hole and is slidably connected to the inner wall of the mounting hole; the clamping assembly and the second mounting seat enclose the clamping cavity.

[0017] In some embodiments, the second mounting seat includes:

[0018] A support member, which is connected to the first mounting seat and is provided with the mounting cavity and the mounting hole;

[0019] A positioning member, which is mounted on the support member and encloses the clamping cavity with the clamping assembly.

[0020] In some embodiments, the positioning member is provided with an avoidance through hole, the positioning pin extends out of the positioning member through the avoidance through hole, and the positioning pin is also slidably connected to the inner wall of the avoidance through hole.

[0021] In some embodiments, the clamping assembly is provided with an avoidance hole opposite to the mounting hole. When the clamping assembly is in the clamping position, the positioning pin is located in the avoidance hole.

[0022] In some embodiments, the clamping assembly includes:

[0023] A first connecting rod, which is connected to the output end of the driving member;

[0024] A clamping mechanism, which includes a second connecting rod, a third connecting rod and a pressing member. The second connecting rod is arranged between the third connecting rod and the first connecting rod and is hinged to the third connecting rod and the first connecting rod. The third connecting rod is also hinged to the mounting seat, and the pressing member is mounted on the third connecting rod. The pressing member and the mounting seat enclose a clamping cavity for clamping the workpiece.

[0025] In some embodiments, the clamping assembly includes two clamping mechanisms, the mounting seat includes a first mounting seat and a second mounting seat, the third connecting rod is hinged to the first mounting seat, the driving member is mounted on the first mounting seat, the second mounting seat is mounted on the first mounting seat, and the second mounting seat is arranged between the two clamping mechanisms. The pressing member and the second mounting seat enclose the clamping cavity, and the limiting mechanism is mounted on the second mounting seat.

[0026] In some embodiments, the first mounting seat includes:

[0027] A mounting plate, on which the driving member and the second mounting seat are both mounted;

[0028] Two connecting plates, which are arranged oppositely, fixedly connected to the mounting plate and are angled. The two third connecting rods are respectively hinged to one side of the two connecting plates away from the mounting plate; the second mounting seat, the first connecting rod and the two second connecting rods are all located between the two connecting plates.

[0029] In some embodiments, the clamping mechanism further includes a gasket, which is arranged between the third connecting rod and the pressing member.

[0030] The present invention has at least the following beneficial effects:

[0031] The fixture positions and clamps the workpiece through the clamping assembly, and limits the workpiece through the limiting mechanism. The limiting mechanism and the clamping assembly limit the workpiece at the same time, ensuring the position accuracy of the workpiece in all directions. The fixture drives the clamping assembly and the limiting mechanism to move simultaneously through one driving member, making the structure of the fixture more compact, occupying less space, and facilitating subsequent processing steps such as welding of the workpiece; and the clamping assembly moves from the loosening position to the clamping position and the limiting mechanism moves from the extending position to the inserting position synchronously, and the clamping assembly moves from the clamping position to the loosening position and the limiting mechanism moves from the inserting position to the extending position synchronously, enabling the clamping mechanism and the limiting mechanism to move synchronously to position the workpiece or move synchronously to release the workpiece, with higher clamping efficiency of the fixture and facilitating the clamping and loosening of the workpiece. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings below are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 Shows a schematic structural diagram of the fixture from a first perspective in one or more embodiments of the present application.

[0034] Figure 2 Shows a top view of the fixture when the clamping assembly is in the clamping position and the limiting mechanism is in the inserting position in one or more embodiments of the present application.

[0035] Figure 3 Shows a top view of the fixture when the clamping assembly is in the loosening position and the limiting mechanism is in the extending position in one or more embodiments of the present application.

[0036] Figure 4 Shows a schematic structural diagram of the fixture from a second perspective in one or more embodiments of the present application.

[0037] Figure 5 Shows a schematic structural diagram when the output ends of the limit mechanism, positioning member, and driving member of the fixture in one or more embodiments of the present application are connected.

[0038] Figure 6 Shows an exploded schematic diagram of the limit mechanism, second mounting seat, and output end of the driving member of the fixture in one or more embodiments of the present application.

[0039] Figure 7 Shows a schematic structural diagram of a workpiece in one or more embodiments of the present application.

[0040] Figure 8 Shows the clamping of the fixture in one or more embodiments of the present application Figure 7 Schematic structural diagram of the workpiece shown.

[0041] Reference numerals: 100 - fixture, 100a - clamping cavity, 110 - mounting seat, 111 - first mounting seat, 1111 - mounting plate, 1112 - connecting plate, 112 - second mounting seat, 112a - mounting cavity, 112b - mounting hole, 1121 - positioning member, 1121a - first pressing surface, 1121b - avoiding through - hole, 1122 - supporting member, 120 - clamping assembly, 121 - first connecting rod, 122 - clamping mechanism, 1221 - second connecting rod, 1222 - third connecting rod, 1223 - pressing member, 1223a - avoiding hole, 1223b - second pressing surface, 1224 - gasket, 130 - limit mechanism, 131 - pin box, 131a - limit hole, 132 - positioning pin, 140 - driving member, 200 - workpiece, 200a - mating hole. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0043] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0044] In the present invention, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0046] The structure of the U-shaped part is as Figure 7 shown. When welding the U-shaped part and the cross beam, it is necessary to clamp the U-shaped part and the cross beam through a tooling so that the relative positions between the U-shaped part and the cross beam meet the requirements. The tooling may include two jigs. One jig is used to clamp the cross beam, and the other jig is used to clamp the U-shaped part.

[0047] It is easy to understand that the jig for clamping the U-shaped part and the jig for clamping the cross beam are installed on a support platform, and the relative positions of these two jigs are fixed. Therefore, after the U-shaped part and the cross beam are respectively positioned and clamped on their respective jigs, the relative positions between the U-shaped part and the cross beam can meet the welding requirements.

[0048] In the related art, the volume of the jig for clamping the U-shaped part is relatively large, occupying the working space of the welding torch, which is not conducive to the welding work of the U-shaped part and the cross beam.

[0049] Therefore, in the related art, there is a technical problem that the volume of the jig is relatively large. An embodiment of the present application provides a jig, which can at least solve the technical problem of the relatively large volume of the jig to a certain extent.

[0050] It should be noted that the jig 100 provided in the present application can be used to clamp Figure 7 the U-shaped part shown, and can also be used to clamp parts with other structural forms, which is not limited in the present application. For example, Figure 8 shows a schematic structural view of the jig 100 clamping Figure 7 the U-shaped part shown. For the convenience of the following description, the part clamped by the jig 100 is called the workpiece 200.

[0051] The present application will be described below in conjunction with the accompanying drawings and with reference to specific embodiments:

[0052] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 8 shown, the fixture 100 is used to clamp the workpiece 200. The fixture 100 includes a mounting base 110, a clamping assembly 120, a limiting mechanism 130, and a driving member 140. The clamping assembly 120 and the limiting mechanism 130 are both mounted on the mounting base 110; the driving member 140 is mounted on the mounting base 110 and is used to drive the clamping assembly 120 and the limiting mechanism 130 to move, so that the clamping assembly 120 can switch between a clamping position close to the mounting base 110 and enclosing with the mounting base 110 to form a clamping cavity 100a for clamping the workpiece 200 and a releasing position for releasing the workpiece 200; and enable the limiting mechanism 130 to switch between a retracted position located inside the workpiece 200 to position the inserted workpiece 200 and an extended position located outside the workpiece 200; and under the condition that the clamping assembly 120 is in the clamping position, the limiting mechanism 130 is in the retracted position, and under the condition that the clamping assembly 120 is in the releasing position, the limiting mechanism 130 is in the extended position.

[0053] The clamping assembly 120, the limiting mechanism 130, and the driving member 140 are all mounted on the mounting base 110, and the mounting base 110 supports the clamping assembly 120, the limiting mechanism 130, and the driving member 140. When using the fixture 100, the mounting base 110 is fixedly mounted on the supporting mechanism that supports it. The specific structure of the supporting mechanism is diverse and is not limited in the present application.

[0054] The driving member 140 drives the clamping assembly 120 and the limiting mechanism 130 to move simultaneously. Under the drive of the driving member 140, the clamping assembly 120 has a clamping position and a releasing position. In the clamping position, the distance between the clamping assembly 120 and the mounting base 110 is smaller, and the clamping assembly 120 presses the workpiece 200 located between the clamping assembly 120 and the mounting base 110, so that the workpiece 200 is fixed. In the releasing position, the distance between the clamping assembly 120 and the mounting base 110 is larger, the clamping assembly 120 is away from the workpiece 200, the clamping assembly 120 releases the workpiece 200 and does not press the workpiece 200. In the releasing position, the workpiece 200 can be taken off the mounting base 110, or the workpiece 200 can be placed on the mounting base 110.

[0055] Driven by the driving member 140, the limiting mechanism 130 has a retracted position and an extended position. In the retracted position, the limiting mechanism 130 is located inside the workpiece 200. Specifically, the workpiece 200 has a mating hole 200a, and at least a part of the limiting mechanism 130 is located inside the mating hole 200a, thereby positioning the workpiece 200. In the extended position, the limiting mechanism 130 is located outside the mating hole 200a and does not position the workpiece 200, so that the workpiece 200 can be removed from the mounting base 110 or placed on the mounting base 110.

[0056] Under the condition that the clamping assembly 120 is in the clamping position, the limiting mechanism 130 is in the retracted position. That is to say, the clamping assembly 120 moves from the released position to the clamping position and the limiting mechanism 130 moves from the extended position to the retracted position synchronously. When the driving member 140 drives the clamping assembly 120 from the released position to the clamping position, it simultaneously drives the limiting mechanism 130 from the extended position to the retracted position.

[0057] Under the condition that the clamping assembly 120 is in the released position, the limiting mechanism 130 is in the extended position. That is to say, the clamping assembly 120 moves from the clamping position to the released position and the limiting mechanism 130 moves from the retracted position to the extended position synchronously. When the driving member 140 drives the clamping assembly 120 from the clamping position to the released position, it simultaneously drives the limiting mechanism 130 from the retracted position to the extended position.

[0058] The fixture 100 limits and clamps the workpiece 200 through the clamping assembly 120 and limits the workpiece 200 through the limiting mechanism 130. The limiting mechanism 130 and the clamping assembly 120 limit the workpiece 200 simultaneously, ensuring the position accuracy of the workpiece 200 in all directions and helping to ensure the accuracy of the position of the workpiece 200. The fixture 100 drives the clamping assembly 120 and the limiting mechanism 130 to move simultaneously through a driving member 140. The structure of the fixture 100 is more compact, occupies less space, and is convenient for subsequent processing steps such as welding of the workpiece 200. Moreover, the clamping assembly 120 moves from the released position to the clamping position and the limiting mechanism 130 moves from the extended position to the retracted position synchronously, and the clamping assembly 120 moves from the clamping position to the released position and the limiting mechanism 130 moves from the retracted position to the extended position synchronously. This enables the clamping mechanism 122 and the limiting mechanism 130 to move synchronously to position the workpiece 200 or to release the workpiece 200 synchronously. The clamping efficiency of the fixture 1000 is higher, facilitating the clamping and releasing of the workpiece 200.

[0059] In some embodiments, the driving member 140 is a cylinder, the output end of the cylinder is the piston rod of the cylinder, and the cylinder drives the clamping assembly 120 and the limiting mechanism 130 to move through the piston rod.

[0060] Such as Figure 5As shown, in some embodiments, the limiting mechanism 130 includes a pin box 131 and a positioning pin 132. The pin box 131 is installed at the output end of the driving member 140, and the positioning pin 132 is slidably connected to the mounting seat 110 along its axis and is in inclined surface cooperation with the pin box 131.

[0061] The positioning pin 132 is slidably connected to the mounting seat 110 along its axis, and the positioning pin 132 can slide along its axial direction. The positioning pin 132 is in inclined surface cooperation with the pin box 131. Specifically, a limiting hole 131a is formed in the pin box 131. The limiting hole 131a is a strip-shaped hole, and the length direction of the limiting hole 131a is not perpendicular to the axial direction of the positioning pin 132, that is, it is set at an obtuse angle or an acute angle. One end of the positioning pin 132 is located in the limiting hole 131a and cooperates with the inner wall of the limiting hole 131a. The pin box 131 is fixedly connected to the output end of the driving member 140. When the driving member 140 acts, it drives the pin box 131 to move linearly. Since one end of the positioning pin 132 is located in the limiting hole 131a and the length direction of the limiting hole 131a is not perpendicular to the axial direction of the positioning pin 132, therefore, the positioning pin 132 will slide along its axis under the drive of the pin box 131, so that the positioning pin 132 extends into the mating hole 200a of the workpiece 200 or extends out of the mating hole 200a and is located outside the mating hole 200a.

[0062] It should be noted that the first direction, the second direction and the third direction in this article are perpendicular to each other.

[0063] In some embodiments, the driving member 140 is a cylinder. The pin box 131 is fixedly connected to the piston rod of the cylinder, and the piston rod drives the pin box 131 to reciprocate in the second direction. As Figure 5 shown, in these embodiments, along the extending direction of the piston rod, the perpendicular distance from the limiting hole 131a to the piston rod gradually increases. After such a design, when the piston rod of the cylinder extends, it drives the positioning pin 132 to retract into the pin box 131, and when the piston rod of the cylinder retracts, it drives the positioning pin 132 to gradually extend out of the pin box 131.

[0064] As Figure 6 shown, in some embodiments, the mounting seat 110 includes a first mounting seat 111 and a second mounting seat 112; the clamping assembly 120 and the driving member 140 are both installed on the first mounting seat 111; the second mounting seat 112 is installed on the first mounting seat 111 and has an installation cavity 112a and an installation hole 112b communicating with the installation cavity 112a. The pin box 131 is arranged in the installation cavity 112a, and the positioning pin 132 is arranged in the installation hole 112b and is slidably connected to the inner wall of the installation hole 112b; the clamping assembly 120 and the second mounting seat 112 enclose a clamping cavity 100a.

[0065] At least a part of the positioning pin 132 is located within the mounting hole 112b and is slidably connected to the inner wall of the mounting hole 112b so that the positioning pin 132 can slide along its axis. The second mounting seat 112 has a mounting cavity 112a and a mounting hole 112b. The pin box 131 is disposed within the mounting cavity 112a such that the pin box 131 does not occupy external space. With such a design, a part of the positioning pin 132 can also be located within the second mounting seat 112, and the positioning pin 132 can either not occupy external space or occupy less external space, which helps to make the structure of the fixture 100 more compact, reduces the occupied space of the fixture 100, and facilitates subsequent welding processing of the workpiece 200. The clamping assembly 120 and the driving member 140 are both mounted on the first mounting seat 111. When the clamping assembly 120 is in the clamping position, the clamping assembly 120 and the second mounting seat 112 form a clamping cavity 100a, and the clamping assembly 120 and the second mounting seat 112 jointly clamp the workpiece 200 located between the second mounting seat 112 and the clamping assembly 120.

[0066] In some embodiments, the pin box 131 is slidably connected to the inner wall of the mounting cavity 112a, which helps to improve the stability of the movement of the pin box 131 and ensures that the positioning pin 132 can extend into the mating hole 200a of the workpiece 200.

[0067] As Figure 6 shown, in some embodiments, the second mounting seat 112 includes a support member 1122 and a positioning member 1121. The support member 1122 is connected to the first mounting seat 111 and is provided with a mounting cavity 112a and a mounting hole 112b; the positioning member 1121 is mounted on the support member 1122 and cooperates with the clamping assembly 120 to enclose a clamping cavity 100a.

[0068] The support member 1122 is provided with a mounting cavity 112a and a mounting hole 112b. The pin box 131 is disposed within the mounting cavity 112a. A part of the positioning pin 132 is located within the mounting hole 112b and is slidably connected to the inner wall of the mounting hole 112b. The positioning member 1121 is fixedly connected to the support member 1122. The positioning member 1121 and the clamping assembly 120 enclose a clamping cavity 100a, and the workpiece 200 is clamped between the positioning member 1121 and the clamping assembly 120. With such a design, the second mounting seat 112 includes a support member 1122 and a positioning member 1121, and the support member 1122 and the positioning member 1121 can be processed separately and then assembled to form the second mounting seat 112, which facilitates the processing of the second mounting seat 112.

[0069] In some embodiments, the positioning member 1121 is detachably connected to the support member 1122. With such a design, when the positioning member 1121 is damaged, the positioning member 1121 can be detached from the support member 1122 to facilitate the replacement or repair of the positioning member 1121.

[0070] In some embodiments, the positioning member 1121 and the support member 1122 are connected by bolts, and the support member 1122 is welded to the first mounting seat 111.

[0071] In some embodiments, the positioning member 1121 is provided with an avoidance through hole 1121b opposite to the mounting hole 112b. The positioning pin 132 extends out of the positioning member 1121 through the avoidance through hole 1121b, and the positioning pin 132 is also slidably connected to the inner wall of the avoidance through hole 1121b. After such a design, the positioning pin 132 is slidably connected not only to the support member 1122 but also to the positioning member 1121, which helps to improve the sliding stability of the positioning pin 132.

[0072] In some embodiments, the workpiece 200 has two mating holes 200a. The second mounting seat 112 includes two positioning members 1121, and the two positioning members 1121 are arranged opposite to each other in the first direction; the limiting mechanism 130 includes two positioning pins 132, and the support member 1122 is provided with two mounting holes 112b; the two positioning pins 132 are respectively slidably connected to the two mounting holes 112b and the two avoidance through holes 1121b. In these embodiments, the two positioning pins 132 are respectively inserted into the two mating holes 200a, and the arrangement of the two positioning pins 132 helps to improve the positioning accuracy of the workpiece 200.

[0073] In some embodiments, the clamping assembly 120 includes a first link 121 and a clamping mechanism 122. The first link 121 is connected to the output end of the driving member 140; the clamping mechanism 122 includes a second link 1221, a third link 1222 and a pressing member 1223. The second link 1221 is arranged between the third link 1222 and the first link 121 and is hinged to the third link 1222 and the first link 121. The third link 1222 is also hinged to the mounting seat 110, and the pressing member 1223 is mounted on the third link 1222. The pressing member 1223 and the mounting seat 110 enclose a clamping cavity 100a for clamping the workpiece 200.

[0074] One end of the first connecting rod 121 is connected to the output end of the driving member 140, and the other end is hinged to one end of the second connecting rod 1221. The other end of the second connecting rod 1221 is hinged to one end of the third connecting rod 1222, and the other end of the third connecting rod 1222 is hinged to the first mounting seat 111. After such a design, when the driving member 140 drives the first connecting rod 121 to move, the second connecting rod 1221 can be driven to rotate, thereby driving the third connecting rod 1222 and the pressing member 1223 thereon to rotate around the first mounting seat 111, so that the pressing member 1223 rotates towards the side of the positioning member 1121 or rotates towards the side away from the positioning member 1121. When the pressing member 1223 rotates towards the side of the positioning member 1121, the pressing member 1223 gradually presses the workpiece 200 located between the pressing member 1223 and the positioning member 1121. When the pressing member 1223 rotates towards the side away from the positioning member 1121, the pressing member 1223 gradually releases the workpiece 200 pressed between the pressing member 1223 and the positioning member 1121, so that the workpiece 200 can be taken off the fixture 100.

[0075] In some embodiments, the driving member 140 is a cylinder. The pin box 131 and the first connecting rod 121 are both fixedly connected to the piston rod of the cylinder, and the piston rod drives the pin box 131 and the first connecting rod 121 to reciprocate in the second direction. When the piston rod extends, the piston rod drives the first connecting rod 121 to move towards the side away from the cylinder block, so that the pressing member 1223 rotates towards the side away from the positioning member 1121, and drives the positioning pin 132 to retract the workpiece into the pin box 131 to release the workpiece 200. When the piston rod contracts, the piston rod drives the first connecting rod 121 to move towards the side close to the cylinder block, so that the pressing member 1223 rotates towards the side close to the positioning member 1121, and drives the positioning pin 132 to extend out of the pin box 131 to clamp the workpiece 200.

[0076] As Figure 4 shown, in some embodiments, the clamping mechanism 122 includes two second connecting rods 1221, and the two second connecting rods 1221 are arranged at intervals in the third direction.

[0077] In some embodiments, the clamping assembly 120 includes two clamping mechanisms 122. The mounting seat 110 includes a first mounting seat 111 and a second mounting seat 112. The third connecting rod 1222 is hinged to the first mounting seat 111, the driving member 140 is mounted on the first mounting seat 111, the second mounting seat 112 is mounted on the first mounting seat 111, and the second mounting seat 112 is arranged between the two clamping mechanisms 122. The pressing member 1223 and the second mounting seat 112 enclose a clamping cavity 100a, and the limiting mechanism 130 is mounted on the second mounting seat 112.

[0078] Through the provision of two clamping mechanisms 122, two pressing members 1223 of the two clamping mechanisms 122 respectively enclose two clamping cavities 100a with two positioning members 1121 of the second mounting seat 112, clamping both sides of the workpiece 200, ensuring the stability of the clamping of the workpiece 200. The second mounting seat 112 is located between the two clamping mechanisms 122, making use of the area between the two clamping mechanisms 122, making the structure of the fixture 100 more compact and reducing the space occupied by the fixture 100.

[0079] In some embodiments, the two clamping mechanisms 122 are arranged opposite to each other in the first direction.

[0080] In some embodiments, the first mounting seat 111 includes a mounting plate 1111 and two connecting plates 1112. The driving member 140 and the second mounting seat 112 are both mounted on the mounting plate 1111. The two connecting plates are arranged opposite to each other, are fixedly connected to the mounting plate 1111 and are arranged at an angle. The two third connecting rods 1222 are respectively hinged to one side of the two connecting plates 1112 away from the mounting plate 1111; the second mounting seat 112, the first connecting rod 121 and the two second connecting rods 1221 are all located between the two connecting plates 1112.

[0081] The connecting plate 1112 is arranged at an angle with the mounting plate 1111, which can be a right angle, an acute angle or an obtuse angle. One side of the mounting plate 1111 is fixedly connected to one of the connecting plates 1112, and the other side is fixedly connected to the other connecting plate 1112. The second mounting seat 112 is arranged between the two connecting plates 1112. The two clamping mechanisms 122 and the two connecting plates 1112 are respectively arranged on both sides of the second mounting seat 112. The third connecting rod 1222 of one clamping mechanism 122 is hinged to one side of one connecting plate 1112 away from the mounting plate 1111. The third connecting rod 1222 of the other clamping mechanism 122 is hinged to one side of the other connecting plate 1112 away from the mounting plate 1111. The second mounting seat 112, the first connecting rod 121 and the two second connecting rods 1221 are all located between the two connecting plates 1112, making use of the area between the two connecting plates 1112, which helps to improve the structural compactness of the fixture 100 and reduce the space occupied by the fixture 100.

[0082] In some embodiments, the two connecting plates 1112 are arranged opposite to each other in the first direction.

[0083] In some embodiments, the connecting plate 1112 is perpendicularly arranged with the mounting plate 1111.

[0084] Such as Figure 2As shown, in some embodiments, the clamping mechanism 122 further includes a gasket 1224 disposed between the third link 1222 and the pressing member 1223. After such a design, the distance between the third link 1222 and the pressing member 1223 can be adjusted by increasing or decreasing the gasket 1224, so that when adjusting the clamping position, the distance between the pressing member 1223 and the positioning member 1121 can be adjusted, enabling the fixture 100 to clamp workpieces 200 of different thicknesses, which facilitates the use of the fixture 100.

[0085] In some embodiments, the third link 1222, the gasket 1224, and the pressing member 1223 are connected by bolts and nuts. The bolt passes through the third link 1222, the gasket 1224, and the pressing member 1223 and is threadedly connected to the nut. The nut and the nut of the bolt clamp the third link 1222, the gasket 1224, and the pressing member 1223 therebetween. In these embodiments, after removing the nut and the bolt, the gasket 1224 can be increased or decreased, thereby adjusting the distance between the third link 1222 and the pressing member 1223.

[0086] In some embodiments, the clamping assembly 120 is provided with an avoidance hole 1223a. When the clamping assembly 120 is in the clamping position, the positioning pin 132 is located in the avoidance hole 1223a.

[0087] In some embodiments, an avoidance hole 1223a is formed in the pressing member 1223. After forming the avoidance hole, when the limiting mechanism 130 is in the inserted position, the positioning pin 132 also extends into the avoidance hole 1223a, enabling the positioning pin 132 to penetrate the workpiece 200, which helps to improve the positioning effect of the positioning pin 132 on the workpiece 200.

[0088] In some embodiments, the avoidance hole 1223a is formed in the pressing member 1223, and the pressing member 1223 and the positioning member 1121 form a clamping cavity 100a, and the pressing member 1223 and the positioning member 1121 clamp the workpiece 200.

[0089] In some embodiments, the pressing member 1223 has a second pressing surface 1223b, and the positioning member 1121 has a first pressing surface 1121. The pressing member 1223 and the positioning member 1121 clamp the workpiece 200 through the second pressing surface 1223b and the first pressing surface 1121.

[0090] In some embodiments, the first pressing surface 1121 is perpendicular to the first direction, the avoidance hole 1223a is formed in the second pressing surface 1223b, and the positioning pin 132 is arranged along the first direction. After such a design, after the positioning pin 132 passes through the mating hole 200a of the workpiece 200, the position of the workpiece 200 in the third direction and the second direction is limited. After the first pressing surface 1121 and the second pressing surface 1223b press the workpiece, the position of the workpiece in the first direction is limited, enabling the workpiece 200 to be accurately positioned in three directions.

[0091] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0092] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0093] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of this application. The scope of this application is defined by the claims and their equivalents.

Claims

1. A fixture, characterized in that, For clamping a workpiece (200), comprising: A mounting base (110); A clamping assembly (120), mounted on the mounting base (110); A limiting mechanism (130), mounted on the mounting base (110); A driving member (140), mounted on the mounting base (110), for driving the clamping assembly (120) and the limiting mechanism (130) to move, so that the clamping assembly (120) can switch between a clamping position close to the mounting base (110) and enclosing with the mounting base (110) a clamping cavity (100a) for clamping the workpiece (200) and a release position for releasing the workpiece (200); and enabling the limiting mechanism (130) to switch between an extending position located inside the workpiece (200) for positioning the workpiece (200) and a protruding position located outside the workpiece (200); and under the condition that the clamping assembly (120) is in the clamping position, the limiting mechanism (130) is in the extending position, and under the condition that the clamping assembly (120) is in the release position, the limiting mechanism (130) is in the protruding position.

2. The fixture according to claim 1, wherein The limiting mechanism (130) includes: A pin box (131), mounted on the output end of the driving member (140); A positioning pin (132), slidably connected to the mounting base (110) along its axial direction and in inclined surface cooperation with the pin box (131).

3. The fixture according to claim 2, wherein The mounting base (110) includes: A first mounting base (111), on which both the clamping assembly (120) and the driving member (140) are mounted; A second mounting base (112), mounted on the first mounting base (111), having a mounting cavity (112a) and a mounting hole (112b) communicating with the mounting cavity (112a), the pin box (131) is disposed in the mounting cavity (112a), the positioning pin (132) is disposed in the mounting hole (112b) and slidably connected to the inner wall of the mounting hole (112b); the clamping assembly (120) and the second mounting base (112) enclose the clamping cavity (100a).

4. The fixture according to claim 3, wherein, The second mounting base (112) includes: A support member (1122), connected to the first mounting base (111), provided with the mounting cavity (112a) and the mounting hole (112b); A positioning member (1121), mounted on the support member (1122), and enclosing the clamping cavity (100a) with the clamping assembly (120).

5. The fixture according to claim 4, characterized in that, The positioning member (1121) is provided with an avoidance through-hole (1121b), the positioning pin (132) extends out of the positioning member (1121) through the avoidance through-hole (1121b), and the positioning pin (132) is also slidably connected to the inner wall of the avoidance through-hole (1121b).

6. The fixture according to claim 2, wherein The clamping assembly (120) is provided with an avoidance hole (1223a) opposite to the mounting hole (112b). When the clamping assembly (120) is in the clamping position, the positioning pin (132) is located in the avoidance hole (1223a).

7. The jig according to any one of claims 1-6, characterized in that, The clamping assembly (120) includes: A first connecting rod (121) connected to the output end of the driving member (140); A clamping mechanism (122) including a second connecting rod (1221), a third connecting rod (1222) and a pressing member (1223). The second connecting rod (1221) is disposed between the third connecting rod (1222) and the first connecting rod (121) and is hinged to the third connecting rod (1222) and the first connecting rod (121). The third connecting rod (1222) is also hinged to the mounting base (110). The pressing member (1223) is mounted on the third connecting rod (1222). The pressing member (1223) and the mounting base (110) enclose a clamping cavity (100a) for clamping the workpiece (200).

8. The jig according to claim 7, wherein The clamping assembly (120) includes two clamping mechanisms (122). The mounting base (110) includes a first mounting base (111) and a second mounting base (112). The third connecting rod (1222) is hinged to the first mounting base (111). The driving member (140) is mounted on the first mounting base (111). The second mounting base (112) is mounted on the first mounting base (111), and the second mounting base (112) is disposed between the two clamping mechanisms (122). The pressing member (1223) and the second mounting base (112) enclose the clamping cavity (100a). The limiting mechanism (130) is mounted on the second mounting base (112).

9. The jig according to claim 8, characterized in that, The first mounting base (111) includes: A mounting plate (1111) on which the driving member (140) and the second mounting base (112) are both mounted; Two connecting plates (1112) which are oppositely arranged, fixedly connected to the mounting plate (1111) and are arranged at an angle. The two third connecting rods (1222) are respectively hinged to one side of the two connecting plates (1112) away from the mounting plate (1111). The second mounting base (112), the first connecting rod (121) and the two second connecting rods (1221) are all located between the two connecting plates (1112).

10. The fixture according to claim 7, wherein The clamping mechanism (122) further includes a gasket (1224) disposed between the third connecting rod (1222) and the pressing member (1223).

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