Pressure holding jig

Abstract

The utility model relates to tool fixture technical field, specifically disclose a kind of pressure maintaining fixture, the pressure maintaining fixture includes locating seat and pressure maintaining mechanism, locating seat is used to fix workpiece;Pressure maintaining mechanism includes with the pressure maintaining seat detachable connection of locating seat, with the pressure maintaining head of pressure maintaining seat swing joint, and with the drive assembly of pressure maintaining head transmission connection, drive assembly includes cam structure, cam structure can drive pressure maintaining head movement along first direction, so that pressure maintaining head abuts against workpiece along first direction, and cam structure piece can also drive pressure maintaining head abuts against workpiece along second direction with first direction intersection, realize to the synchronous positioning of workpiece along first direction and second direction, it is easy to operate and can guarantee the synchronism of positioning, simultaneously still can simplify the structure of positioning fixture, reduce cost.

Description

Technical Field

[0001] This disclosure relates to the field of tooling and fixture technology, and in particular to a pressure-holding fixture. Background Technology

[0002] In the processing industry, when the workpiece is deformed due to the operation process (such as bending), it is usually necessary to apply a certain pressure to the deformed workpiece using a pressure holding fixture to keep the workpiece in its deformed shape for a period of time to eliminate the internal stress generated after the workpiece is deformed. This ensures that the deformed shape of the workpiece can be kept stable, so as to avoid the workpiece springing back due to the failure to eliminate internal stress, which would affect the quality of the workpiece.

[0003] In existing technologies, pressure-holding fixtures typically include a pressure-holding head and a linear drive mechanism that drives the pressure-holding head to press against the deformed workpiece for pressure holding and positioning. Depending on the specific structure of the workpiece, some workpieces require multiple pressure-holding heads moving in different directions to perform pressure holding and positioning along multiple different directions. For example, a first pressure-holding head may need to move vertically to perform pressure holding and positioning of the workpiece vertically, while a second pressure-holding head may need to move horizontally to perform pressure holding and positioning of the workpiece horizontally. This makes it difficult to ensure the synchronicity of the movement of each pressure-holding head; furthermore, each pressure-holding head usually requires a separate linear drive mechanism, which also leads to a complex structure and high cost of the pressure-holding fixture. Utility Model Content

[0004] The purpose of this disclosure is to provide a pressure-holding fixture to improve the synchronization of pressure-holding positioning of existing pressure-holding fixtures, simplify the pressure-holding fixture, and reduce the cost of the pressure-holding fixture.

[0005] This disclosure provides a pressure-holding fixture, which includes:

[0006] Positioning seat, used to fix the workpiece; and,

[0007] The pressure holding mechanism includes a pressure holding seat detachably connected to the positioning seat, a pressure holding head movably connected to the pressure holding seat, and a drive assembly driven by the pressure holding head. The drive assembly includes a cam structure that can drive the pressure holding head to move relative to the pressure holding seat in a first direction, such that the pressure holding head abuts against the workpiece in the first direction. The cam structure can also drive the pressure holding head to move relative to the pressure holding seat in a second direction, such that the pressure holding head abuts against the workpiece in the second direction. The first direction and the second direction intersect.

[0008] As a preferred technical solution for the pressure-holding fixture, the cam structure includes a rotating shaft, a first cam fixedly sleeved on the rotating shaft, and a second cam fixedly sleeved on the rotating shaft. When the rotating shaft is rotated, the first cam can drive the pressure-holding head to move relative to the pressure-holding seat in a first direction, and the second cam can drive the pressure-holding head to move relative to the pressure-holding seat in a second direction.

[0009] As a preferred technical solution for the pressure-holding fixture, the pressure-holding mechanism includes two pressure-holding heads, which are disposed opposite to each other on both sides of the positioning seat along the second direction, and both pressure-holding heads are movably connected to the pressure-holding seat.

[0010] When the shaft is rotated, the first cam can drive the two pressure-holding heads to reciprocate simultaneously relative to the pressure-holding seat in a first direction, and the second cam can drive the two pressure-holding heads to move closer to or further away from each other relative to the pressure-holding seat in a second direction.

[0011] As a preferred technical solution for the pressure-holding fixture, the pressure-holding mechanism further includes a sliding mechanism, which comprises:

[0012] The first slide rail is fixedly installed on the pressure-holding seat, and the first slide rail extends along the first direction;

[0013] The first slider is slidably sleeved on the first slide rail, and the first cam can abut against the first slider and drive the first slider to move the pressure holding head along the first direction;

[0014] A second slide rail is fixedly mounted to the first slider, and the second slide rail extends along the second direction; and,

[0015] The second slider is slidably fitted onto the second slide rail. The pressure holding head is connected to the second slider. The second cam can abut against the second slider and drive the second slider to move the pressure holding head along the second direction.

[0016] As a preferred technical solution for the pressure-holding fixture, the cam structure further includes a first elastic element connected to the first slider. The first elastic element is configured to ensure that the first slider always has a tendency to drive the pressure-holding head toward the positioning seat along the first direction.

[0017] As a preferred technical solution for the pressure-holding fixture, the cam structure further includes a second elastic element connected between the second slider and the first slider. The second elastic element is configured to ensure that the second slider always has a tendency to drive the pressure-holding head toward the positioning seat along the second direction.

[0018] As a preferred technical solution for the pressure-holding fixture, the pressure-holding mechanism further includes a cover plate, which is detachably connected to the pressure-holding seat, and the cover plate and the pressure-holding seat form an open receiving cavity. The sliding mechanism is disposed inside the receiving cavity, and the pressure-holding head is located outside the receiving cavity.

[0019] According to the pressure-holding fixture of the claim, the driving assembly further includes a handle fixedly connected to the rotating shaft, the handle being located outside the receiving cavity.

[0020] As a preferred technical solution for the pressure-holding fixture, the pressure-holding mechanism further includes a clamping head rotatably connected to the pressure-holding seat, and an elastic element connected between the clamping head and the pressure-holding seat. The elastic element is configured to ensure that the clamping head always has a tendency to press the workpiece against the positioning seat.

[0021] As a preferred embodiment of the pressure-holding fixture, the pressure-holding fixture further includes a snap-fit ​​component fixedly connected to the pressure-holding base, a snap hook rotatably connected to the positioning base, a snap-fit ​​component having a snap groove, and the snap hook snapping into the snap groove; and / or,

[0022] The pressure-holding fixture further includes a first magnet embedded in the pressure-holding base, and a second magnet embedded in the positioning base; the first magnet and the second magnet are magnetically attracted to each other; and / or

[0023] The pressure-holding fixture also includes a positioning pin fixedly connected to the pressure-holding seat. The positioning seat is provided with a positioning hole, and the positioning pin is inserted into the positioning hole.

[0024] The pressure-holding fixture disclosed herein has at least the following beneficial effects:

[0025] The pressure-holding fixture includes a positioning seat and a pressure-holding mechanism. The pressure-holding mechanism includes a pressure-holding seat detachably connected to the positioning seat, a pressure-holding head movably connected to the pressure-holding seat, and a drive assembly driven by the pressure-holding head. The workpiece is fixed by the positioning seat. The cam structure of the drive assembly drives the pressure-holding head to move relative to the pressure-holding seat in a first direction and also drives the pressure-holding head to move relative to the pressure-holding seat in a second direction. This allows the pressure-holding head to abut against the workpiece in both the first and second directions, achieving synchronous pressure holding and positioning of the workpiece in both directions. This method is convenient to operate and ensures the synchronicity of positioning. It also simplifies the structure of the positioning fixture and reduces costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the pressure-holding fixture in an embodiment of this disclosure;

[0027] Figure 2 This is a schematic diagram of the positioning seat in an embodiment of this disclosure;

[0028] Figure 3 This is an exploded view of the positioning seat in an embodiment of this disclosure;

[0029] Figure 4 This is a schematic diagram of the pressure-holding mechanism in an embodiment of this disclosure;

[0030] Figure 5 This is a schematic diagram of the structure of the clamping head in an embodiment of this disclosure;

[0031] Figure 6 This is an exploded view of a partial structure of the pressure-holding mechanism in an embodiment of this disclosure;

[0032] Figure 7 This is a schematic diagram of a first partial structure of the pressure-holding mechanism in an embodiment of this disclosure;

[0033] Figure 8 This is a schematic diagram of the second partial structure of the pressure-holding mechanism in an embodiment of this disclosure;

[0034] Figure 9 This is a schematic diagram of the third partial structure of the pressure-holding mechanism in an embodiment of this disclosure;

[0035] Figure 10 This is a schematic diagram of the fourth partial structure of the pressure-holding mechanism in an embodiment of this disclosure.

[0036] In the picture:

[0037] 100. Positioning seat; 200. Pressure holding mechanism;

[0038] 11. Base; 111. Positioning hole; 12. Positioning body; 121. Positioning groove; 13. First rotating shaft; 14. First positioning magnet; 15. Second positioning magnet; 16. Hook; 17. Third elastic element; 18. Second magnet;

[0039] 21. Pressure holding seat; 22. Pressure holding head; 23. Cam structure; 231. Rotating shaft; 232. First cam; 233. Second cam; 234. First elastic element; 235. Second elastic element; 24. Pressing head; 25. Elastic element; 26. Second rotating shaft; 27. Sliding mechanism; 271. First slide rail; 272. First slider; 273. Second slide rail; 274. Second slider; 28. Cover plate; 281. QR code; 29. ​​Receiving cavity; 291. Opening; 30. Handle; 35. Positioning pin; 32. Detection piece; 33. Snap-fit ​​piece; 331. Slot; 34. First magnet. Detailed Implementation

[0040] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0041] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions, and "above," "on top," and "over" of the first feature and the second feature include the first feature directly above and diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" of the first feature and the second feature include the first feature directly below and diagonally below the second feature, or simply indicate that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0043] The embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this disclosure, and should not be construed as limiting this disclosure.

[0044] In existing technologies, pressure-holding fixtures typically include a pressure-holding head and a linear drive mechanism that drives the pressure-holding head to press against the deformed workpiece for pressure holding and positioning. Depending on the specific structure of the workpiece, some workpieces require vertical pressure holding and positioning via the movement of a first pressure-holding head, and horizontal pressure holding and positioning via the movement of a second pressure-holding head. This makes it difficult to ensure the synchronicity of the movement of each pressure-holding head; furthermore, each pressure-holding head usually requires a separate linear drive mechanism, which also leads to a complex structure and high cost of the pressure-holding fixture.

[0045] To address this issue, this embodiment provides a pressure-holding fixture to solve the above problems. This pressure-holding fixture is suitable for pressure-holding and positioning workpieces.

[0046] The workpiece can be a single workpiece; the workpiece can also include multiple single workpieces. For example, the workpiece includes a first workpiece and a second workpiece. The first workpiece needs to be initially assembled with the second workpiece. Then, the first workpiece needs to be bent and pressure-held. Then, the first workpiece and the second workpiece need to be assembled into one piece through processes such as welding and hot melting.

[0047] Furthermore, the workpiece can be made of metal or plastic. The workpiece can be a thin material.

[0048] Please refer to Figures 1 to 8 The pressure-holding fixture includes a positioning seat 100 and a pressure-holding mechanism 200. The positioning seat 100 is used to fix the workpiece (not shown in the attached drawings); the pressure-holding mechanism 200 includes a pressure-holding base 21, a pressure-holding head 22, and a drive assembly. The pressure-holding base 21 is detachably connected to the positioning seat 100, the pressure-holding head 22 is movably connected to the pressure-holding base 21, and the drive assembly is drively connected to the pressure-holding head 22. The drive assembly includes a cam structure 23, which can drive the pressure-holding head 22 relative to the pressure-holding base 21 along a first direction (e.g., ...). Figure 1 The pressure holding head 22 moves in the direction indicated by the middle arrow ab, so that it abuts against the workpiece in the first direction. The cam structure 23 can also drive the pressure holding head 22 relative to the pressure holding seat 21 in the second direction (e.g., ...). Figure 1The pressure-holding head 22 moves in the direction indicated by the middle arrow cd, so that it abuts against the workpiece in the second direction, where the first and second directions intersect. The pressure-holding fixture provided in this embodiment drives the pressure-holding head 22 to move relative to the pressure-holding seat 21 in the first direction via the cam structure 23, while simultaneously driving the pressure-holding head 22 to move relative to the pressure-holding seat 21 in the second direction. This ensures that the pressure-holding head 22 simultaneously maintains pressure and positions the workpiece in both directions, thus avoiding the problem of synchronizing the movements of multiple pressure-holding heads when performing multi-directional pressure-holding and positioning in the prior art. Furthermore, the simultaneous driving of the pressure-holding head 22 in both directions via the cam structure 23 facilitates operation, simplifies the structure of the pressure-holding fixture, and reduces costs.

[0049] Optionally, in this embodiment, the first direction is a vertical direction, the second direction is a horizontal direction, and the first direction is perpendicular to the second direction. In other embodiments, the first direction and the second direction can be selected as other directions according to actual needs, and the angle between the first direction and the second direction is not limited to being perpendicular.

[0050] Optionally, the positioning method of the positioning seat 100 for the workpiece can be set according to actual needs. For example, the positioning seat 100 can directly clamp and position a part of the workpiece to limit the workpiece's degrees of freedom in the front-back, left-right, and up-down directions; the positioning seat 100 can also position the workpiece through a groove to limit the workpiece's degrees of freedom in the left-right, front-back, and down directions. In this embodiment, an exemplary scheme is provided where the positioning seat 100 is provided with a positioning groove 121, which is used to accommodate the workpiece.

[0051] Optionally, the positioning base 100 includes a base 11 and a positioning body 12 rotatably connected to the base 11 via a first rotating shaft 13, with a positioning groove 121 disposed in the positioning body 12. This configuration allows the finished workpiece to be easily removed from the positioning groove 121 by rotating the positioning body 12 after the pressure holding operation on the workpiece is completed; it also facilitates the placement of the workpiece to be processed into the positioning groove 121.

[0052] Optionally, the positioning base 100 further includes a first positioning magnet 14 installed on the positioning body 12 and a second positioning magnet 15 installed on the base 11. Both the first positioning magnet 14 and the second positioning magnet 15 are located between the rotating shaft and the positioning groove 121, and the first positioning magnet 14 and the second positioning magnet 15 are magnetically attracted to each other. With this arrangement, after the workpiece is installed into the positioning groove 121, the attraction between the first positioning magnet 14 and the second positioning magnet 15 ensures the relative position of the positioning body 12 and the base 11 remains stable, thereby guaranteeing the accuracy of subsequent workpiece pressure holding and positioning operations. Preferably, two first positioning magnets 14 are spaced apart along the second direction on the positioning body 12, and two second positioning magnets 15 are spaced apart along the second direction on the base 11. The two first positioning magnets 14 and the two second positioning magnets 15 can be attracted to each other in a one-to-one correspondence.

[0053] Alternatively, please refer to Figure 5 The pressure-holding mechanism 200 also includes a clamping head 24 rotatably connected to the pressure-holding seat 21, and an elastic element 25 connected between the clamping head 24 and the pressure-holding seat 21. The elastic element 25 is configured to ensure that the clamping head 24 always has a tendency to press the workpiece against the positioning seat 100. Specifically, the clamping head 24 is rotatably connected to the pressure-holding seat 21 via a second rotating shaft 26. By setting the clamping head 24, the workpiece can be stably fixed on the positioning seat 100, thereby ensuring that the position of the workpiece remains stable when the pressure-holding head 22 performs pressure-holding and positioning on the workpiece. In particular, when the workpiece includes a first workpiece and a second workpiece that need to be assembled, the positioning seat 100 can be used to position the second workpiece, the clamping head 24 can press the first workpiece from top to bottom onto the second workpiece, and then the pressure-holding head 22 can be used to perform bending and pressure-holding operations on the first workpiece, ensuring that the first workpiece remains stable during processing. In other embodiments, the positioning seat 100 also includes an elbow clamp rotatably connected to the positioning body 12, the elbow clamp being used to press the workpiece against the positioning body 12.

[0054] Alternatively, please refer to Figure 6 and Figure 8 The cam structure 23 includes a rotating shaft 231, a first cam 232 fixedly sleeved on the rotating shaft 231, and a second cam 233 fixedly sleeved on the rotating shaft 231. When the rotating shaft 231 is rotated, the first cam 232 can drive the pressure-holding head 22 to move relative to the pressure-holding seat 21 in a first direction, and the second cam 233 can drive the pressure-holding head 22 to move relative to the pressure-holding seat 21 in a second direction. With this configuration, by rotating the rotating shaft 231, the first cam 232 drives the pressure-holding head 22 to move in the first direction to maintain pressure and position the workpiece in the first direction, and the second cam 233 drives the pressure-holding head 22 to move in the second direction to maintain pressure and position the workpiece in the second direction. The operation is simple.

[0055] Alternatively, please refer to Figure 4 The pressure-holding mechanism 200 includes two pressure-holding heads 22, which are disposed opposite each other on both sides of the positioning seat 100 along a second direction. Both pressure-holding heads 22 are movably connected to the pressure-holding seat 21. When the rotating shaft 231 is rotated, the first cam 232 can drive the two pressure-holding heads 22 to reciprocate relative to the pressure-holding seat 21 simultaneously along the first direction. The second cam 233 can drive the two pressure-holding heads 22 to move closer or further away from each other relative to the pressure-holding seat 21 along the second direction, thereby realizing that the two cam structures 23 can simultaneously drive the two pressure-holding heads 22. With this configuration, the cam structure 23 can simultaneously drive the two pressure-holding heads 22 to move relative to the pressure-holding seat 21 along the first direction and simultaneously abut against the workpiece along the first direction to maintain pressure and position the workpiece along the first direction. The cam structure 23 can also simultaneously drive the two pressure-holding heads 22 to move closer to each other along the second direction to abut against the two ends of the workpiece in the second direction, thereby maintaining pressure and positioning the two ends of the workpiece in the second direction simultaneously.

[0056] Alternatively, please refer to Figures 4 to 10 The pressure-holding mechanism 200 also includes a sliding mechanism 27, which includes a first slide rail 271, a first slider 272, a second slide rail 273, and a second slider 274. The first slide rail 271 is fixedly installed on the pressure-holding seat 21 and extends along a first direction. The first slider 272 is slidably sleeved on the first slide rail 271. The first cam 232 can abut against the first slider 272 and drive the first slider 272 to move the pressure-holding head 22 along the first direction. The second slide rail 273 is fixedly installed on the first slider 272 and extends along a second direction. The second slider 274 is slidably sleeved on the second slide rail 273. The pressure-holding head 22 is connected to the second slider 274. The second cam 233 can abut against the second slider 274 and drive the second slider 274 to move the pressure-holding head 22 along the second direction. With this configuration, rotating the shaft 231 causes the first cam 232 to drive the first slider 272 to move along a first direction. This, in turn, drives the second slider 274 and the pressure-holding head 22 to move synchronously along the first direction. Simultaneously, the second cam 233 directly drives the second slider 274 to move along a second direction, which in turn drives the pressure-holding head 22 to move synchronously along the second direction. This achieves synchronized movement of the pressure-holding head 22 along both directions. Furthermore, the sliding engagement between the first slider 272 and the first slide rail 271 ensures the stability of the pressure-holding head 22's movement along the first direction, and the sliding engagement between the second slider 274 and the second slide rail 273 ensures the stability of the pressure-holding head 22's movement along the second direction.

[0057] Specifically, in this embodiment, a second slider 274 is provided for each pressure holding head 22. Both second sliders 274 are slidably engaged with the second slide rail 273. The two pressure holding heads 22 are respectively connected to the two second sliders 274. The second cam 233 is located between the two second sliders 274. When the second cam 233 rotates, it can drive the two second sliders 274 to move closer or further away along the second direction.

[0058] Optionally, the sliding mechanism 27 includes two first slide rails 271 and two second slide rails 273. The first slider 272 slides in contact with both first slide rails 271, and the second slider 274 slides in contact with both second slide rails 273. This configuration can further improve the stability of the first slider 272 moving in the first direction and the stability of the second slider 274 moving in the second direction, thereby improving the movement stability of the pressure holding head 22.

[0059] Alternatively, please refer to Figure 4 , Figure 9 and Figure 10 The pressure-holding mechanism 200 also includes a cover plate 28, which is detachably connected to the pressure-holding seat 21. The cover plate 28 and the pressure-holding seat 21 form a receiving cavity 29 with an opening 291. The sliding mechanism 27 is disposed within the receiving cavity 29, and the pressure-holding head 22 is located outside the receiving cavity 29. This arrangement allows the cover plate 28 to provide protection, preventing the operator from contacting the sliding mechanism 27 and ensuring the operator's safety. Preferably, the pressure-holding head 22 is connected to the second slider 274 by bolts.

[0060] Alternatively, please refer to Figure 9 The outer surface of the cover plate 28 is provided with a barcode and / or a QR code 281, which facilitates the storage and retrieval of the pressure-holding fixture. In this embodiment, a scheme in which the outer surface of the cover plate 28 is provided with a QR code 281 is provided as an example. In other embodiments, a barcode may also be provided on the outer surface of the cover plate 28 as needed, or both a barcode and a QR code 281 may be provided on the outer surface of the cover plate 28.

[0061] Alternatively, please refer to Figure 6 and Figure 7The cam structure 23 also includes a first elastic element 234 connected to the first slider 272. The first elastic element 234 is configured to ensure that the first slider 272 always has a tendency to drive the pressure-holding head 22 towards the positioning seat 100 along a first direction. In this embodiment, the first slider 272 can move along the first slide rail 271 to have a first position and a second position. When the first slider 272 is in the first position, the pressure-holding head 22 can abut against the workpiece along the first direction to maintain pressure and position the workpiece along the first direction. When the first slider 272 is in the second position, the pressure-holding head 22 separates from the workpiece along the first direction. The first cam 232 can drive the first slider 272 to move to the second position, and the first elastic element 234 can drive the first slider 272 to move to the first position and maintain it in the first position to ensure the pressure-holding effect. Preferably, the first elastic element 234 is connected between the cover plate 28 and the first slider 272. More preferably, the cam structure 23 includes two first elastic elements 234, which are spaced apart along a second direction, and both first elastic elements 234 are connected between the cover plate 28 and the first slider 272. In this embodiment, the first elastic element 234 is preferably a compression spring; in other embodiments, the first elastic element 234 may also be a tension spring.

[0062] Alternatively, please refer to Figure 6 and Figure 8 The cam structure 23 further includes a second elastic element 235 connected between the second slider 274 and the first slider 272. The second elastic element 235 is configured to ensure that the second slider 274 always has a tendency to drive the pressure-holding head 22 towards the positioning seat 100 along the second direction. In this embodiment, the second slider 274 can move along the second slide rail 273 to have a third position and a fourth position. When the first slider 272 is in the first position and the second slider 274 is in the third position, the pressure-holding head 22 abuts against the workpiece along the second direction for pressure-holding and positioning of the workpiece along the second direction. When the second slider 274 is in the fourth position, the pressure-holding head 22 separates from the workpiece along the second direction. The second cam 233 can drive the second slider 274 to move to the fourth position, and the second elastic element 235 can drive the second slider 274 to move to the third position and maintain it in the third position to ensure the pressure-holding and positioning effect on the workpiece. In this embodiment, the second elastic element 235 is preferably a compression spring; in other embodiments, the second elastic element 235 can also be a tension spring.

[0063] Alternatively, please refer to Figure 6 and Figure 8 The drive assembly also includes a handle 30, which is fixedly connected to the rotating shaft 231 and is located outside the receiving cavity 29. With this configuration, rotating the handle 30 drives the rotating shaft 231 to rotate, which in turn drives the first cam 232 and the second cam 233 to rotate synchronously, making operation simple.

[0064] Optionally, the pressure holding mechanism 200 also includes a detection element 32 fixedly connected to the pressure holding head 22. The detection element 32 is used to cooperate with visual inspection fixtures (such as CCD, camera, etc.) to detect the position of the pressure holding head 22.

[0065] Alternatively, please refer to Figures 1 to 4 The pressure-holding fixture also includes a snap-fit ​​component 33 fixedly connected to the pressure-holding seat 21. A snap hook 16 is rotatably connected to the positioning seat 100. The snap-fit ​​component 33 is provided with a snap groove 331, and the snap hook 16 snaps into the snap groove 331. Specifically, the snap hook is rotatably mounted on the base 11. This arrangement facilitates the disassembly, assembly, and maintenance of both the positioning seat 100 and the pressure-holding seat 21. Preferably, a third elastic element 17 is connected between the base 11 and the snap hook 16. The third elastic element 17 is configured to ensure that the snap hook 16 always has a tendency to snap into the snap groove 331, thereby ensuring the stability of the snap-fit ​​between the snap hook 16 and the snap-fit ​​component 33. The third elastic element 17 can be a tension spring, compression spring, or torsion spring, etc. More preferably, the positioning seat 100 is provided with two hooks 16 at both ends along the second direction, and the pressure holding seat 21 is connected to two snap-fit ​​pieces 33 at both ends along the second direction. The two hooks 16 are snapped into the slots 331 of the two snap-fit ​​pieces 33 in a one-to-one correspondence, so as to improve the stability of the positioning seat 100 and the pressure holding seat 21 after connection.

[0066] Alternatively, please refer to Figure 2 , Figure 3 and Figure 10 The pressure-holding fixture also includes a first magnet 34 embedded in the pressure-holding seat 21 and a second magnet 18 embedded in the positioning seat 100. The first magnet 34 and the second magnet 18 are magnetically attracted to each other. This arrangement ensures the stability of the positioning seat 100 and the pressure-holding seat 21 after connection. Preferably, the pressure-holding seat 21 is provided with two first magnets 34 spaced apart along the second direction, and the positioning seat 100 is provided with two second magnets 18 spaced apart along the second direction. The two first magnets 34 and the two second magnets 18 are attracted to each other in a one-to-one manner to further improve the stability of the positioning seat 100 and the pressure-holding seat 21 after connection.

[0067] Optionally, the pressure-holding fixture also includes a positioning pin 35 fixedly connected to the pressure-holding seat 21. The positioning seat 100 is provided with a positioning hole 111, and the positioning pin 35 is inserted into the positioning hole 111. Specifically, the positioning hole 111 is provided on the base 11. This arrangement can ensure the accuracy of the relative position of the pressure-holding seat 21 and the positioning seat 100 after connection. More preferably, the pressure-holding fixture includes two positioning pins 35, both of which are fixedly connected to the pressure-holding seat 21, and the two positioning pins 35 are spaced apart along the second direction. The base 11 is provided with two positioning holes 111 spaced apart along the second direction, and the two positioning pins 35 are inserted into the two positioning holes 111 in a one-to-one correspondence to further improve the accuracy of the relative position of the pressure-holding seat 21 and the positioning seat 100 after connection.

[0068] The method of using this pressure-holding fixture is as follows:

[0069] 1) Rotate the handle 30, the first cam 232 drives the first slider 272 to move to the second position, and at the same time the second cam 233 drives the two second sliders 274 to move to the fourth position, so that the two pressure holding heads 22 move upward at the same time and separate in the left and right directions at the same time.

[0070] 2) Flip the clamping head 24 upward, then place the second workpiece on the positioning seat 100, then place the first workpiece above the second workpiece, and press the first workpiece onto the second workpiece using the clamping head 24;

[0071] 3) Rotate the handle 30 in the opposite direction. The first elastic element 234 drives the first slider 272 to move to the first position, and at the same time, the two second elastic elements 235 drive the two second sliders 274 to move to the third position, so that the two pressure-holding heads 22 simultaneously move downward and abut against the workpiece, and the two pressure-holding heads 22 simultaneously move closer to each other in the left and right directions and abut against the two ends of the workpiece in the left and right directions, so as to hold and position the workpiece.

[0072] Obviously, the above embodiments of this disclosure are merely examples for clear illustration and are not intended to limit the implementation of this disclosure. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of the claims of this disclosure.

Claims

1. A hold-down jig characterized by, include: Positioning seat, used to fix the workpiece; and, The pressure holding mechanism includes a pressure holding seat detachably connected to the positioning seat, a pressure holding head movably connected to the pressure holding seat, and a drive assembly driven by the pressure holding head. The drive assembly includes a cam structure that can drive the pressure holding head to move relative to the pressure holding seat in a first direction, such that the pressure holding head abuts against the workpiece in the first direction. The cam structure can also drive the pressure holding head to move relative to the pressure holding seat in a second direction, such that the pressure holding head abuts against the workpiece in the second direction. The first direction and the second direction intersect.

2. The hold-down jig of claim 1, wherein The cam structure includes a rotating shaft, a first cam fixedly sleeved on the rotating shaft, and a second cam fixedly sleeved on the rotating shaft. When the rotating shaft is rotated, the first cam can drive the pressure holding head to move relative to the pressure holding seat in a first direction, and the second cam can drive the pressure holding head to move relative to the pressure holding seat in a second direction.

3. The hold-down jig of claim 2, wherein The pressure holding mechanism includes two pressure holding heads, which are disposed opposite to each other on both sides of the positioning seat along the second direction, and both pressure holding heads are movably connected to the pressure holding seat. When the shaft is rotated, the first cam can drive the two pressure-holding heads to reciprocate simultaneously relative to the pressure-holding seat in a first direction, and the second cam can drive the two pressure-holding heads to move closer to or further away from each other relative to the pressure-holding seat in a second direction.

4. The holding fixture of claim 2, wherein The pressure-holding mechanism further includes a sliding mechanism, which comprises: The first slide rail is fixedly installed on the pressure-holding seat, and the first slide rail extends along the first direction; The first slider is slidably sleeved on the first slide rail, and the first cam can abut against the first slider and drive the first slider to move the pressure holding head along the first direction; A second slide rail is fixedly mounted to the first slider, and the second slide rail extends along the second direction; and, The second slider is slidably fitted onto the second slide rail. The pressure holding head is connected to the second slider. The second cam can abut against the second slider and drive the second slider to move the pressure holding head along the second direction.

5. The holding fixture of claim 4, wherein The cam structure further includes a first elastic element connected to the first slider, the first elastic element being configured to ensure that the first slider always has a tendency to move the pressure-holding head toward the positioning seat along the first direction.

6. The holding fixture of claim 5, wherein The cam structure further includes a second elastic element connected between the second slider and the first slider. The second elastic element is configured to ensure that the second slider always has a tendency to move the pressure-holding head closer to the positioning seat along the second direction.

7. The holding fixture of claim 4, wherein The pressure-holding mechanism further includes a cover plate, which is detachably connected to the pressure-holding seat, and the cover plate and the pressure-holding seat form an open receiving cavity. The sliding mechanism is disposed inside the receiving cavity, and the pressure-holding head is located outside the receiving cavity.

8. The hold-down jig of claim 7, wherein, The drive assembly also includes a handle fixedly connected to the rotating shaft, the handle being located outside the receiving cavity.

9. The hold-down tool of any of claims 1-8, wherein, The pressure holding mechanism further includes a pressing head rotatably connected to the pressure holding seat, and an elastic element connected between the pressing head and the pressure holding seat, the elastic element being configured to ensure that the pressing head always has a tendency to press the workpiece against the positioning seat.

10. The hold-down tooling of any of claims 1-8, wherein, The pressure-holding fixture further includes a snap-fit ​​component fixedly connected to the pressure-holding base, a snap hook rotatably connected to the positioning base, and a snap-fit ​​component having a snap groove, with the snap hook snapping into the snap groove; and / or The pressure-holding fixture further includes a first magnet embedded in the pressure-holding base, and a second magnet embedded in the positioning base; the first magnet and the second magnet are magnetically attracted to each other; and / or The pressure-holding fixture also includes a positioning pin fixedly connected to the pressure-holding seat. The positioning seat is provided with a positioning hole, and the positioning pin is inserted into the positioning hole.

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