Gripper and positioning equipment

Abstract

The present application relates to the field of template production, and specifically provides a clamp and positioning device, wherein the clamp comprises a housing, a driving member arranged on the housing, a telescopic member, two connecting members and two clamping members. The telescopic member is connected to the driving member, and the driving member can drive the telescopic member to telescopically move. The two connecting members are located on opposite sides of the telescopic member, one end of the connecting member is rotatably connected to the telescopic member, and has a first rotation point. The two clamping members are used to clamp the template, each clamping member is rotatably connected to the other end of a connecting member, and has a second rotation point, the clamping member is rotatably connected to the housing and has a third rotation point, the third rotation point is located on the side of the telescopic member away from the driving member, and the third rotation point is located between the two first rotation points. When the telescopic member is extended, the two clamping members are in a clamping state, and the two second rotation points are located on the side of the third rotation point away from the telescopic member. When the telescopic member is retracted, the two clamping members are in an open state, and the two second rotation points are located on opposite sides of the third rotation point.

Description

Technical Field

[0001] The present application relates to the field of template production, and in particular to a clamp and positioning device. Background Art

[0002] Aluminum formwork is widely used in the construction industry due to its reusability, strength and stability. In order to ensure that the aluminum formwork has better strength, it is usually necessary to weld reinforcing ribs on the formwork during production. Currently, the formwork is usually clamped and positioned by the clamps on the positioning equipment so that the welding equipment can accurately weld the formwork.

[0003] Since the maximum angle that the traditional jaws can open is small, the distance between the jaws and the reference surface on which the template is placed does not change much whether the jaws are opened or clamped. In order to prevent the jaws from interfering with the template, the jaws usually need to be connected to a cylinder to drive the jaws to move vertically. When the jaws need to clamp the template, the cylinder drives the jaws to move downward, and controls the jaws to clamp the template through the driving parts that come with the jaws. When the jaws do not need to clamp the template, the cylinder drives the jaws to move upward to prevent the jaws from interfering with the template. Therefore, the jaws usually need to be connected to two driving sources: a cylinder that drives the jaws to move vertically and a driving part that drives the jaws to clamp the template. This not only increases the manufacturing cost of the equipment, but the jaws also need to move vertically before clamping. Too many movements lead to a long production cycle. Summary of the invention

[0004] In view of this, it is necessary to provide a clamping jaw and a positioning device with a large maximum opening angle.

[0005] The embodiment of the present application provides a clamping claw, comprising a shell, a driving member arranged on the shell, a telescopic member, two connecting members and two clamping members. The telescopic member is connected to the driving member, and the driving member can drive the telescopic member to telescopically move. The two connecting members are located on opposite sides of the telescopic member, one end of the connecting member is rotatably connected to the telescopic member, and has a first rotation point. The two clamping members are used to clamp the template, each of the clamping members is rotatably connected to the other end of one of the connecting members, and has a second rotation point, the clamping member is rotatably connected to the shell and has a third rotation point, the third rotation point is located on the side of the telescopic member away from the driving member, and the third rotation point is located between the two first rotation points. When the telescopic member is extended, the two clamping members are in a clamping state, and the two second rotation points are located on the side of the third rotation point away from the telescopic member. When the telescopic member is retracted, the two clamping members are in an open state, and the two second rotation points are located on opposite sides of the third rotation point.

[0006] In the clamping jaws of the above embodiment, the angle of rotation of the clamping member is the same as the angle of rotation of the second rotation point around the third rotation point. Since the third rotation point is located on the side of the telescopic member away from the driving member and between the two first rotation points, when the clamping member rotates from the clamping state to the open state, the two second rotation points can rotate from the third rotation point away from the side of the telescopic member to the opposite sides of the third rotation point. As a result, the clamping member can rotate at a larger angle, so that the clamping member will not interfere with the template in the open state, and there is no need to connect an additional cylinder or other driving source to control the vertical movement of the clamping jaw, which can save the cost of manufacturing equipment and reduce the steps of the clamping jaw clamping the template, thereby reducing the production cycle time.

[0007] In at least one embodiment, the telescopic member is rotatably connected to the driving member, and the telescopic member can rotate at a preset angle relative to the driving member.

[0008] In the clamping jaws of the above embodiment, the reference surface on which the template is placed may be non-level due to errors, resulting in the template on the reference surface being tilted. The telescopic member is rotatably connected to the driving member, so that when the clamping member clamps the template, the template applies force to the clamping member, so that the clamping member can tilt adaptively with the template to improve the stability of the clamped template.

[0009] In at least one embodiment, the driving member includes a driving body and a connecting head fixed to the driving body, the telescopic member is provided with a connecting groove, the connecting head extends into the connecting groove and is rotatably connected to the telescopic member, the connecting head has a stop surface, and the stop surface is used to abut against the telescopic member to prevent the telescopic member from rotating.

[0010] In the clamping jaws of the above embodiment, the driving body can drive the connecting head to extend or retract, and the connecting head can extend into the connecting groove to realize the rotational connection between the telescopic member and the connecting head. In addition, since the stop surface can abut against the telescopic member, the telescopic member is blocked from rotating, so that the telescopic member can rotate within an appropriate range.

[0011] In at least one embodiment, the connecting head includes a first connecting part and a second connecting part, the first connecting part is located between the second connecting part and the driving body, and has a stop surface connected to the second connecting part, the second connecting part extends into the connecting groove, and is rotatably connected to the telescopic part, and a gap is left between the stop surface and the telescopic part, and the stop surface is used to abut against the telescopic part to prevent the telescopic part from rotating.

[0012] In the clamping jaws of the above embodiment, the first connection part is connected to the driving body, and the second connection part extends into the connection groove so that the second connection part is rotatably connected to the telescopic member. The stop surface is the surface where the first connection part and the second connection part meet, so that the range of the preset angle can be adjusted by adjusting the position of the stop surface.

[0013] In at least one embodiment, the preset angle is greater than 0° and less than or equal to 5°.

[0014] In the clamping jaws of the above-mentioned embodiment, if the preset angle is too large, the clamping piece will easily shake, and the inclination angle of the reference surface caused by the error will not be too large. Therefore, the preset angle is greater than 0° and less than or equal to 5°. The angle range is moderate, and the clamping piece is not easy to shake and can also adapt to the clamping template.

[0015] In at least one embodiment, the two clamping members are rotated from a clamping state to an open state by a clamping angle, and the clamping angle is greater than or equal to 90° and less than 180°.

[0016] In the clamping jaws of the above embodiment, the clamping angle is greater than or equal to 90° and less than 180°, so that when the clamping member rotates the clamping angle from the clamping state to form an open state, the second rotation point is not lower than the third rotation point, which can effectively reduce the interference between the clamping member and the template.

[0017] In at least one embodiment, the telescopic member includes a first part and two second parts arranged on the first part, the driving member is connected to the first part, the connecting member is connected to the second part, the first part and the two second parts surround to form an accommodating area, when the first part is extended, the third rotation point is located in the accommodating area, and when the first part is retracted, the third rotation point is located outside the accommodating area.

[0018] In the clamping jaws of the above embodiment, the connecting member is connected to the second portion, which can shorten the distance between the first rotation point and the second rotation point, so as to reduce the interference between the telescopic member, the connecting member and the clamping member during the clamping process of the clamping jaws.

[0019] In at least one embodiment, a clamping strip is provided on one side of the two clamping members close to each other for clamping the template.

[0020] In the clamping jaws of the above embodiment, the clamping strip can increase the friction between the clamping strip and the template to improve the stability of the clamping template.

[0021] An embodiment of the present application also provides a positioning device, including a sliding frame, a body and a clamp, wherein the body is used to place the template, the sliding frame is slidably disposed on the body, and the clamp is fixed to the sliding frame for clamping and positioning the template.

[0022] In the positioning device of the above embodiment, the template is placed on the fuselage, and the clamping claw can clamp the template and drag the template to a preset position through the sliding frame for welding.

[0023] In at least one embodiment, the telescopic member of the clamp is rotatably connected to the driving member, and the telescopic member can rotate at a preset angle relative to the driving member.

[0024] In the positioning device of the above embodiment, due to the error, the reference surface on the fuselage where the template is placed is tilted, and the telescopic member is rotatably connected to the driving member, so that when the clamping member clamps the template, it can be tilted according to the template. Therefore, when clamping the template, the position of the template can be kept stable, and when the template is dragged by the sliding frame, since the template is in contact with the fuselage, the fuselage and the clamping member cooperate to keep the template accurately moved to the position to be processed.

[0025] The clamping member in the clamping jaw of the present application can rotate at a large angle so that the clamping member will not interfere with the template when in the open state, so that the clamping jaw does not need to be additionally connected to a cylinder or other driving source that can drive the clamping jaw to move vertically, thereby reducing manufacturing costs and reducing the steps of positioning the template, thereby reducing production cycle time and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural diagram of the clamp in one embodiment of the present application.

[0027] Figure 2 yes Figure 1 The middle clamping piece is a side view of the clamping jaws in the clamping state.

[0028] Figure 3 yes Figure 1 The middle clamp is a side view of the clamping jaws in the open state.

[0029] Figure 4 yes Figure 1 A side view of the inclined jaws of the middle telescopic member.

[0030] Figure 5 yes Figure 2 A is an enlarged view of the middle image.

[0031] Figure 6 yes Figure 1 Partially exploded view of the middle jaw.

[0032] Figure 7 It is a structural diagram of the positioning equipment and template.

[0033] Main component symbols

[0034] Gripper 100

[0035] Housing 10

[0036] Driving member 20

[0037] Drive body 21

[0038] Connector 22

[0039] The first connection portion 221

[0040] Stop surface 2211

[0041] The second connection portion 222

[0042] Telescopic parts 30

[0043] Part 131

[0044] Connection slot 311

[0045] Part 2 32

[0046] First rotation point 321

[0047] Accommodation area 33

[0048] Connector 40

[0049] The second rotation point 41

[0050] Clamp 50

[0051] The third turning point 51

[0052] Clamping strip 52

[0053] Sliding rack 60

[0054] Body 70

[0055] Reference surface 71

[0056] Template 200

[0057] Clamping angle α

[0058] Preset angle β

[0059] First direction Z

[0060] Second direction X DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0062] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0063] When two elements (planes, lines) are arranged in parallel, it should be understood that the relationship between the two elements includes parallel and approximately parallel. Approximately parallel should be understood as a certain angle between the two elements, which is greater than 0° and less than or equal to 10°.

[0064] When two elements (planes, lines) are arranged vertically, it should be understood that the relationship between the two elements includes vertical and approximately vertical. The approximately vertical should be understood as the angle between the two elements being greater than or equal to 80° and less than 90°.

[0065] When a parameter is greater than, equal to, or less than a certain endpoint value, it should be understood that the endpoint value is allowed to have a tolerance of ±10%. For example, if the ratio of A to B is greater than 10, it should be understood to include the case where the ratio of A to B is greater than 9, and also include the case where the ratio of A to B is greater than 11.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0067] Some embodiments of the present application provide a clamping claw, comprising a housing, a driving member arranged on the housing, a telescopic member, two connecting members and two clamping members. The telescopic member is connected to the driving member, and the driving member can drive the telescopic member to telescopically move. The two connecting members are located on opposite sides of the telescopic member, one end of the connecting member is rotatably connected to the telescopic member, and has a first rotation point. The two clamping members are used to clamp the template, each of the clamping members is rotatably connected to the other end of one of the connecting members, and has a second rotation point, the clamping member is rotatably connected to the housing and has a third rotation point, the third rotation point is located on the side of the telescopic member away from the driving member, and the third rotation point is located between the two first rotation points. When the telescopic member is extended, the two clamping members are in a clamping state, and the two second rotation points are located on the side of the third rotation point away from the telescopic member. When the telescopic member is retracted, the two clamping members are in an open state, and the two second rotation points are located on opposite sides of the third rotation point.

[0068] In the clamping jaws of the above embodiment, the angle of rotation of the clamping member is the same as the angle of rotation of the second rotation point around the third rotation point. Since the third rotation point is located on the side of the telescopic member away from the driving member and between the two first rotation points, when the clamping member rotates from the clamping state to the open state, the two second rotation points can rotate from the third rotation point away from the side of the telescopic member to the opposite sides of the third rotation point. Therefore, the clamping member can rotate a larger angle, so that the clamping member will not interfere with the template in the open state, and there is no need to connect an additional cylinder or other driving source to control the vertical movement of the clamping jaw, which can save the cost of manufacturing equipment and reduce the steps of the clamping jaw clamping the template, thereby reducing the production cycle time.

[0069] Some embodiments of the present application will be described below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0070] See also Figure 1 and Figure 2 In one embodiment, a clamp 100 is provided, which is used to clamp and position a template 200 to facilitate welding of the template 200. The clamp 100 includes a housing 10, a driving member 20, a telescopic member 30, two connecting members 40 and two clamping members 50. The driving member 20 is fixed to the housing 10, and the telescopic member 30 is fixed to the driving member 20. The driving member 20 can drive the telescopic member 30 to extend along a first direction Z or retract in the opposite direction of the first direction Z. The two connecting members 40 are located on opposite sides of the telescopic member 30, and one end of each connecting member 40 is rotatably connected to the telescopic member 30, and the connection point between the connecting member 40 and the telescopic member 30 is the first rotation point 321, and the other end of each connecting member 40 is rotatably connected to a clamping member 50, and the connection point is the second rotation point 41. The clamping member 50 is rotatably connected to the housing 10 , and the connection point is located at a third rotation point 51 . The clamping member 50 rotates along the third rotation point 51 , so that the two clamping members 50 cooperate to clamp the template 200 .

[0071] See also Figure 2 and Figure 3, the third rotation point 51 is located between the two first rotation points 321, and when the telescopic member 30 moves telescopically along the first direction Z, the first rotation point 321 also moves along the first direction Z with the telescopic member 30. When the driving member 20 drives the telescopic member 30 so that the telescopic member 30 moves from retraction to extension, the clamping member 50 rotates around the third rotation point 51 toward the first direction Z and forms a clamping state to clamp the template 200. The second rotation point 41 rotates around the third rotation point 51 so that the second rotation point 41 is located on the side of the third rotation point 51 away from the telescopic member 30. When the driving member 20 drives the telescopic member 30 so that the telescopic member 30 moves from extension to retraction, the clamping member 50 rotates around the third rotation point 51 in the opposite direction of the first direction Z and forms an open state so that the clamping jaw 100 does not interfere with the template 200. The second rotation point 41 rotates around the third rotation point 51 so that the two second rotation points 41 are located on opposite sides of the third rotation point 51. By driving the telescopic member 30 to move through the driving member 20, the clamping member 50 can rotate at a larger angle, and when the two clamping members 50 are in the open state, the angle between the two clamping members 50 is the largest. At this time, the clamping jaw 100 will not interfere with the template 200, so that the positioning device provided with the clamping jaw 100 does not need to be additionally configured with a cylinder for driving the clamping jaw 100 to move along the first direction Z, which can reduce manufacturing costs and reduce the steps of clamping the template 200, thereby reducing production cycle time and improving efficiency.

[0072] The telescopic member 30 includes a first portion 31 and two second portions 32, the two second portions 32 are located at opposite sides of the first portion 31, and are integrally formed with the first portion 31, so that the telescopic member 30 is in a U-shape. The first portion 31 is connected to the driving member 20. The second portion 32 is rotatably connected to one end of the connecting member 40 through a pin shaft, and a first rotation point 321 is formed, and the first rotation point 321 is located at one end of the second portion 32 away from the first portion 31.

[0073] It is understandable that the shape of the telescopic member 30 is not limited to U-shape, but can also be other shapes such as a straight line. The first rotation point 321 is not limited to being located at the end of the second part 32 away from the first part 31, but can also be located at other positions such as the end of the second part 32 close to the first part 31.

[0074] When the telescopic member 30 is U-shaped, the first part 31 and the second part 32 surround to form an accommodating area 33. When the driving member 20 drives the telescopic member 30 to extend, the telescopic member 30 moves in the first direction Z, and the accommodating area 33 accommodates the third rotation point 51. When the driving member 20 drives the telescopic member 30 to retract, the third rotation point 51 is located outside the accommodating area 33.

[0075] One end of the connecting member 40 away from the second portion 32 is rotatably connected to the clamping member 50 via a pin shaft to form a second rotation point 41 . The clamping member 50 is rotatably connected to the housing 10 via a pin shaft to form a third rotation point 51 .

[0076] The clamping member 50 is rotated from the clamping state to the open state through the clamping angle α, and the clamping angle α is greater than or equal to 90° and less than 180°.

[0077] Optionally, in some embodiments, when the clamping member 50 is in a clamping state, the first rotation point 321 and the second rotation point 41 are spaced apart along the second direction X perpendicular to the first direction Z, and the third rotation point 51 and the second rotation point 41 are spaced apart along the first direction Z. When the clamping member 50 is in an open state, the first rotation point 321 and the second rotation point 41 are spaced apart along the first direction Z, and the second rotation point 41 and the third rotation point 51 are spaced apart along the second direction X. The clamping angle α of the clamping member 50 is 90°. It is understandable that the clamping angle α is not limited to 90°, and the positions of the first rotation point 321 and the second rotation point 41 can be adjusted according to needs to adjust the clamping angle α.

[0078] The clamping angle α of the clamping member 50 is actually equal to the angle of rotation of the second rotation point 41 around the third rotation point 51. Since the third rotation point 51 is disposed on the side of the telescopic member 30 away from the driving member 20 and between the two first rotation points 321, the second rotation point 41 can rotate from the side of the third rotation point 51 close to the first direction Z to the side of the third rotation point close to the second direction X. This makes the clamping member 50 have a larger clamping angle α.

[0079] Please refer to Figure 1 Optionally, in some embodiments, a clamping strip 52 is provided on one side of two clamping members 50 close to each other. There are multiple clamping strips 52 on each clamping member 50, and the clamping strips 52 are arranged at intervals on the clamping member 50 to increase the friction force when clamping the template 200, so as to facilitate more stable clamping of the positioning template 200.

[0080] See also Figure 4 , Figure 5 and Figure 6 Optionally, in some embodiments, the driving member 20 is rotatably connected to the telescopic member 30, and an external force is applied to the telescopic member 30, so that the telescopic member 30 can rotate at a preset angle β relative to the driving member 20, so that the clamping state of the two clamping members 50 is inclined relative to the first direction Z.

[0081] Due to installation errors, production errors, equipment structure errors and other reasons, the reference plane 71 on which the template 200 is placed in actual production does not necessarily remain horizontal, that is, the reference plane 71 is not necessarily perpendicular to the first direction Z, but has a certain tilt error. Therefore, the template 200 placed on the reference plane 71 will also have a tilt error, that is, the clamping surface of the clamping jaw 100 clamping the template 200 will be tilted relative to the first direction Z. Since the telescopic member 30 is rotatably connected to the driving member 20, when the driving member 20 drives the telescopic member 30 to extend, the two clamping members 50 cooperate to clamp the template 200, and can adaptively adjust the tilt angle of the two clamping members 50 according to the tilt angle of the template 200, so that the tilt angle of the clamping member 50 is consistent with the tilt angle of the template 200, so as to accurately clamp and position the template 200. Compared with the telescopic member 30 being fixed to the driving member 20, that is, the telescopic member 30 cannot rotate relative to the driving member 20, the clamping member 50 of the present application can adaptively adjust the angle to adapt to the inclination angle of the template 200, so that the position of the template 200 can be kept stable when clamping the template 200, so as to improve the welding accuracy.

[0082] The driving member 20 includes a driving body 21 and a connecting head 22, the connecting head 22 is fixed to the driving body 21, the driving body 21 can drive the connecting head 22 to telescopically move, and the telescopic member 30 is connected to the driving body 21 through the connecting head 22. A connecting groove 311 is provided on one side of the telescopic member 30 close to the driving body 21, and the telescopic head part extends into the connecting groove 311 and is rotatably connected to the telescopic member 30.

[0083] It is understandable that the connection method between the connecting head 22 and the telescopic member 30 is not limited to the telescopic member 30 providing a connecting groove 311 and partially extending the telescopic member 30 into the connecting groove 311. It can also be other methods such as a protrusion being provided on the telescopic member 30 and the connecting head 22 being rotatably connected to the protrusion.

[0084] The connector 22 includes a first connecting portion 221 and a second connecting portion 222, the first connecting portion 221 and the second connecting portion 222 are integrally formed, the first connecting portion 221 is located between the second connecting portion 222 and the driving body 21, and is fixedly connected to the driving body 21. The second connecting portion 222 extends into the connecting groove 311 and is rotatably connected to the telescopic member 30 through a pin. The first connecting portion 221 has a stop surface 2211, which is a plane where the first connecting portion 221 and the second connecting portion 222 meet. A gap is left between the stop surface 2211 and the telescopic member 30, and when the telescopic member 30 rotates relative to the connector 22, the stop surface 2211 can abut against the telescopic member 30 to prevent the telescopic member 30 from continuing to rotate. Thereby, the telescopic member 30 can rotate within a preset angle β range.

[0085] The preset angle β is greater than 0° and less than or equal to 5°. When the preset angle β is too large, the telescopic member 30 is prone to shaking, affecting the clamping stability of the template 200. In addition, the inclination of the reference plane 71 is caused by an error, and the inclination angle is not large. Therefore, the preset angle β is greater than 0° and less than or equal to 5° to maintain the clamping stability of the template 200 and to cope with the situation where the reference plane 71 is tilted due to an error. Optionally, the preset angle β is 3°.

[0086] See also Figure 7 The embodiment of the present application further provides a positioning device, including a sliding frame 60, a body 70 and a clamp 100. The clamp 100 is detachably fixed to the sliding frame 60, and the sliding frame 60 is slidably connected to the body 70. The body 70 is provided with a reference surface 71, and the reference surface 71 is used to place the template 200. The clamp 100 can clamp the template 200 on the reference surface 71, and drag the template 200 under the action of the sliding frame 60, so that the template 200 can slide along the reference surface 71 to the position to be processed, so as to weld the template 200.

[0087] Optionally, in some embodiments, the connecting head 22 of the clamp 100 is rotatably connected to the telescopic member 30, and the rotation range of the telescopic member 30 relative to the connecting head 22 is a preset angle β, so that when the reference plane 71 is tilted due to an error, the clamp 100 can adaptively adjust the angle and accurately clamp the template 200 on the reference plane 71.

[0088] In summary, a clamp 100 and a positioning device are provided in the embodiment of the present application, and the clamp 50 can rotate to a larger clamping angle α, so that the clamp 50 changes from a clamping state to an open state, or changes from an open state to a clamping state. Due to the large clamping angle α, the clamp 50 can be in an open state without interfering with the template 200, so that no additional cylinder or other driving source is required to drive the clamp 100 to move vertically. In addition, the cost of the positioning device can be reduced and the action of the clamp 100 clamping the template 200 can be reduced to reduce the production cycle time. In addition, the telescopic member 30 can rotate relative to the driving member 20 by a preset angle β. When the template 200 is tilted, the clamp 50 can adapt to the tilt angle of the template 200 and clamp the template 200 in an inclined manner, thereby improving the clamping and positioning accuracy of the template 200.

[0089] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. A positioning device, characterized in that: It comprises a sliding frame, a body and a clamping claw, wherein the body is used to place the template, the sliding frame is slidably arranged on the body, and the clamping claw is fixed to the sliding frame and is used to clamp and position the template; The clamping jaw comprises a housing and a driving member disposed on the housing, and is characterized in that it further comprises: A telescopic member connected to the driving member, wherein the driving member can drive the telescopic member to move telescopically; Two connecting members, located at opposite sides of the telescopic member, one end of each connecting member is rotatably connected to the telescopic member and has a first rotation point; Two clamping members, used for clamping the template, each of the clamping members is rotatably connected to the other end of one of the connecting members and has a second rotation point, the clamping members are rotatably connected to the housing and have a third rotation point, the third rotation point is located on the side of the telescopic member away from the driving member, and the third rotation point is located between the two first rotation points; When the telescopic member is extended, the two clamping members are in a clamping state, and the two second rotation points are located on the side of the third rotation point away from the telescopic member; when the telescopic member is retracted, the two clamping members are in an open state, and the two second rotation points are located on opposite sides of the third rotation point; The telescopic member includes a first portion and two second portions arranged on the first portion, the driving member is connected to the first portion, the connecting member is connected to the second portion, the first portion and the two second portions surround and form a receiving area, when the first portion is extended, the third rotation point is located in the receiving area, and when the first portion is retracted, the third rotation point is located outside the receiving area; The telescopic member of the clamp is rotatably connected to the driving member, and the telescopic member can rotate relative to the driving member at a preset angle; There are notches on both sides of the shell; the driving member includes a driving body and a connecting head fixed to the driving body, the telescopic member is provided with a connecting groove, the connecting head extends into the connecting groove and is rotatably connected to the telescopic member, the connecting head has a stop surface, and the stop surface is used to abut against the telescopic member to prevent the telescopic member from rotating.

2. The positioning device according to claim 1, characterized in that: The connecting head includes a first connecting part and a second connecting part, the first connecting part is located between the second connecting part and the driving body, and has a stop surface connected to the second connecting part, the second connecting part extends into the connecting groove, and is rotatably connected to the telescopic part, and a gap is left between the stop surface and the telescopic part, and the stop surface is used to abut against the telescopic part to prevent the telescopic part from rotating.

3. The positioning device according to claim 1, characterized in that: The preset angle is greater than 0° and less than or equal to 5°.

4. The positioning device according to claim 1, characterized in that: The two clamping members are rotated from a clamping state to an open state by a clamping angle, wherein the clamping angle is greater than or equal to 90° and less than 180°.

5. The positioning device according to claim 1, characterized in that: A clamping strip is arranged on one side of the two clamping members close to each other for clamping the template.

Images