A positioning and clamping device for cache chassis parts

Abstract

The application provides a positioning and clamping device for a case part, and belongs to the technical field of machining. The device specifically comprises a bottom plate, a base, a locking mechanism and a pressing mechanism. One side of the bottom plate is fixedly connected to a fourth shaft turntable. The other side of the bottom plate is provided with a first dovetail groove. The axis of the first dovetail groove is parallel to the length direction of the bottom plate. The base is fixedly connected with a dovetail block matched with the first dovetail groove on one side. The base is slidably connected with the bottom plate through the cooperation of the dovetail block and the first dovetail groove. The locking mechanism and the pressing mechanism are detachably connected to the upper surface of the base. The locking mechanism and the pressing mechanism are located inside the case part. The locking mechanism and the pressing mechanism are alternately arranged. The pressing mechanism is close to the side wall of the case part. The locking mechanism applies a radial clamping force to the side wall of the case part on both sides. The pressing mechanism is attached to and pressed against the inner cavity boss of the case part. The scheme can prevent workpiece deformation and is compatible with different turntables and clamps.

Description

Technical Field

[0001] This application relates to the field of machining technology, and in particular to a positioning and clamping device for quick-access chassis-type parts. Background Technology

[0002] Chinese Patent Publication No. CN218312064U, published on January 7, 2023, discloses a utility model entitled "An Inner Cavity Positioning Fixture for Chassis Parts". This application discloses an innovative fixture for multi-faceted one-time milling of chassis parts by positioning and clamping in the inner cavity. However, the fixture has shortcomings because chassis workpieces have complex and diverse structures, resulting in poor adaptability and insufficient positioning accuracy. In the application of a fourth-axis turntable, the dynamic matching between the fixture and the turntable is poor, which can easily lead to vibration or displacement. Utility Model Content

[0003] In view of this, the present application provides a positioning and clamping device for quick-access chassis parts, which overcomes the technical problem in the prior art that the dynamic matching between the clamp and the turntable is poor, which easily leads to vibration or displacement.

[0004] This application provides a positioning and clamping device for quick-access chassis-type parts, including a base plate, a base, a locking mechanism, and a clamping mechanism. One side of the base plate is fixedly connected to a fourth axis turntable, and the other side of the base plate is provided with a first dovetail groove. The axis of the first dovetail groove is parallel to the length direction of the base plate. One side of the base is fixedly connected to a dovetail block that mates with the first dovetail groove. The base and the base plate are slidably connected through the engagement of the dovetail block and the first dovetail groove. The locking mechanism and the clamping mechanism are detachably connected to the top of the base. Both the locking mechanism and the clamping mechanism are located inside the chassis-type parts and are alternately arranged. The clamping mechanism is close to the side wall of the chassis-type parts. The two sides of the locking mechanism apply radial clamping force to the side wall of the chassis-type parts. The clamping mechanism is attached to and clamped to the inner cavity boss of the chassis-type parts.

[0005] According to a specific implementation of an embodiment of this application, the locking mechanism includes a bidirectional screw, a slider, a locking slider, and a locking block. A second dovetail groove is provided on the upper part of the base, and the axis of the second dovetail groove is perpendicular to the axis of the first dovetail groove. The bidirectional screw is detachably connected to the second dovetail groove. The bidirectional screw is provided with bidirectional threads, and a slider and a locking slider are fitted on the threads in each direction. The locking slider is located outside the slider. The slider and the bidirectional screw adopt a ball screw structure. The locking slider and the bidirectional screw are connected through a light hole on the locking slider. A locking block is fixedly connected to the upper side of each locking slider. By rotating the bidirectional screw, the slider drives the locking block to move toward the side wall of the chassis-like part, and the locking block applies a radial clamping force to the side wall of the chassis-like part.

[0006] According to one specific implementation of the embodiments of this application, the locking block is configured as a wedge-angle locking block.

[0007] According to a specific implementation of an embodiment of this application, the angle of the wedge angle locking block is set to 15°~20°.

[0008] According to a specific implementation of an embodiment of this application, the locking mechanism further includes a limiting block for limiting the locking slider, the limiting block being disposed at both ends of the second dovetail groove.

[0009] According to one specific implementation of the present application, the slider is provided with a lubricating coating, which is used to reduce the friction caused by the bidirectional screw.

[0010] According to a specific implementation of an embodiment of this application, the pressing mechanism includes a pad and a pressure plate. The pad is detachably connected to the upper part of the base. The length direction of the pad is perpendicular to the axis of the first dovetail groove. The pressure plate is detachably connected to the upper side of the pad. The pressure plate is attached to and pressed against the inner cavity boss of the chassis-type part.

[0011] According to a specific implementation of an embodiment of this application, the pad is detachably connected to the top of the base by a first hex screw, and the pressure plate is detachably connected to the pad by a second hex screw.

[0012] According to a specific implementation of the present application, the base is provided with a threaded hole on its upper surface. The base and the pad are detachably connected by the cooperation of a first hexagonal screw with the threaded hole. A first through hole is provided on one side of the base, and a bolt is provided in the first through hole. The base is connected to the dovetail block by means of the bolt.

[0013] According to a specific implementation of the present application, the middle area of ​​the base plate is provided with a plurality of second through holes, which are arranged along the length of the base plate. The base is fixed to the base plate by cooperating with the connecting parts through the second through holes. The height of the base relative to the fourth axis turntable is adjusted by selecting the second through holes at different positions.

[0014] Beneficial effects: The positioning and clamping device for quick-access chassis parts in this embodiment ensures uniform clamping force distribution and prevents workpiece deformation by setting a locking mechanism and a pressing mechanism in linkage. Furthermore, through optimized base rigidity, it is mounted on a fourth-axis turntable. The base plate and base adopt a standard quick-change interface, which is compatible with different turntables and fixture extensions. This achieves efficient, high-precision, and rapid positioning and clamping of chassis workpieces, and is especially suitable for brazing chassis with dimensional fluctuations, large geometric tolerances, or thin walls that are easily deformed. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural diagram of a positioning and clamping device for quick-access chassis parts according to an embodiment of the present invention; Figure 2 This is a structural diagram of a base according to an embodiment of the present invention; Figure 3 An exploded view of a locking mechanism according to an embodiment of the present invention; Figure 4 This is a structural diagram of a wedge-angle locking block according to an embodiment of the present invention; Figure 5 This is a structural diagram of a locking slider according to an embodiment of the present invention; Figure 6 This is a structural diagram of a slider according to an embodiment of the present invention; Figure 7 This is a structural diagram of a limiting block according to an embodiment of the present invention. Figure 8 An exploded view of a clamping mechanism according to an embodiment of the present invention; Figure 9 This is a structural diagram of a positioning clamping device without an installed base plate according to an embodiment of the present invention; Figure 10 This is a schematic diagram of a positioning and clamping device for quick-access chassis parts according to an embodiment of the present invention, and a chassis clamping device.

[0017] In the diagram: 1. Base plate; 2. Base; 21. Second dovetail groove; 22. Threaded hole; 23. First through hole; 3. Locking mechanism; 31. Wedge locking block; 32. Double-acting screw; 33. Screw; 34. Slider; 35. Limiting block; 36. Locking slider; 4. Pressing mechanism; 41. Pad; 42. First hexagonal socket screw; 43. Pressure plate; 44. Second hexagonal socket screw; 5. Chassis parts; 51. Internal cavity boss. Detailed Implementation

[0018] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0019] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0021] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0022] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0023] This application provides a positioning and clamping device for quick-access chassis parts, as described below. Figures 1 to 10 Provide a detailed description.

[0024] In one embodiment, refer to Figure 1 and Figure 2A positioning and clamping device for a quick-access chassis-type part 5 is provided, including a base plate 1, a base 2, a locking mechanism 3, and a clamping mechanism 4. One side of the base plate 1 is fixedly connected to a fourth axis turntable, and the other side of the base plate 1 is provided with a first dovetail groove. The axis of the first dovetail groove is parallel to the length direction of the base plate 1. One side of the base 2 is fixedly connected with a dovetail block that mates with the first dovetail groove. The base 2 and the base plate 1 are slidably connected through the mating of the dovetail block and the first dovetail groove. The locking mechanism 3 and the clamping mechanism 4 are detachably connected to the top of the base 2. Both the locking mechanism 3 and the clamping mechanism 4 are located inside the chassis-type part 5. The locking mechanism 3 and the clamping mechanism 4 are alternately arranged. The clamping mechanism 4 is close to the side wall of the chassis-type part 5. The two sides of the locking mechanism 3 apply radial clamping force to the side wall of the chassis-type part 5. The clamping mechanism 4 is attached to and clamped to the inner cavity boss 51 of the chassis-type part 5.

[0025] The positioning and clamping device for the quick-access chassis part 5 in this embodiment is a quick-access chassis internal positioning and clamping mechanism that loads the quick-access chassis part 5 onto the fourth axis turntable through internal cavity positioning and clamping. It includes a detachable base plate 1, a detachable base 2, a detachable clamping mechanism 4, and a detachable locking mechanism 3. The base plate 1 can be fixed to the fourth axis turntable with bolts, providing rigid support and force transmission, which greatly increases the overall stability of the fixture. The base 2 and the base plate 1 are connected by a first dovetail groove or pin, which can be quickly disassembled and assembled, and is compatible with different turntable models. The base 2 and the base plate 1 adopt a standard quick-change interface, which is compatible with different turntables and fixture expansions.

[0026] In one embodiment, refer to Figures 3 to 7 The locking mechanism 3 includes a bidirectional screw 32, a slider 34, a locking slider 36, and a locking block. The base 2 has a second dovetail groove 21 on its upper surface. The axis of the second dovetail groove 21 is perpendicular to the axis of the first dovetail groove. The bidirectional screw 32 is detachably connected to the second dovetail groove 21. The bidirectional screw 32 has bidirectional threads. A slider 34 and a locking slider 36 are fitted on each thread. The locking slider 36 is located outside the slider 34. The slider 34 and the bidirectional screw 32 adopt a ball screw structure. The locking slider 36 and the bidirectional screw 32 are connected through a light hole on the locking slider 36. A locking block is fixedly connected to the upper side of each locking slider 36. By rotating the bidirectional screw 32, the slider 34 drives the locking block to move toward the side wall of the chassis part 5. The locking block applies a radial clamping force to the side wall of the chassis part 5.

[0027] In specific implementation, the bidirectional screw 32 is set in the second dovetail groove 21. A blocking block is provided in the middle area of ​​the second dovetail groove 21. The bidirectional screw 32 passes through the blocking block. The slider 34 is sleeved on the bidirectional screw 32 and located on both sides of the blocking block. The locking slider 36 is located outside the slider 34. When the bidirectional screw 32 is rotated, the slider 34 moves along the bidirectional screw 32 to both ends, and at the same time pushes the locking slider 36 to both ends. The locking block is connected to the upper side of the locking slider 36 by screws 33, so the locking block also moves to both ends until it contacts the side wall of the chassis-like part 5. The locking blocks at both ends apply a radial clamping force to the side wall of the chassis-like part 5. In this embodiment, the bidirectional screw 32, slider 34, and locking slider 36 of the locking mechanism 3 realize the linear movement of the slider 34 through thread transmission, drive the locking block to apply a radial clamping force to the workpiece, and through the bidirectional thread design of the screw, the centering and clamping of the workpiece can be automatically completed.

[0028] Furthermore, the locking block is configured as a wedge-angle locking block 31.

[0029] Preferably, the wedge angle of the wedge locking block 31 is set to 15°~20°. The locking block adopts a wedge angle design, which is suitable for uneven plate surfaces after workpiece brazing. The wedge angle is preferably set to 15°~20° to achieve self-locking and rapid release.

[0030] In one embodiment, the locking mechanism 3 further includes a limiting block 35 for limiting the locking slider 36, the limiting block 35 being disposed at both ends of the second dovetail groove 21. In specific implementation, the limiting block 35 is press-fitted to both ends of the second dovetail groove 21 to prevent the locking slider 36 from dislodging during movement.

[0031] In one embodiment, the slider 34 is provided with a lubricating coating, which is used to reduce the friction caused by the bidirectional screw 32. By providing a lubricating coating, the service life of the slider 34 can be extended.

[0032] In one embodiment, refer to Figure 8 The pressing mechanism 4 includes a pad 41 and a pressure plate 43. The pad 41 is detachably connected to the upper part of the base 2. The length direction of the pad 41 is perpendicular to the axis of the first dovetail groove. The pressure plate 43 is detachably connected to the upper side of the pad 41. The pressure plate 43 is attached to and pressed against the inner cavity boss 51 of the chassis-type part 5.

[0033] In specific implementation, the clamping mechanism 4 is set on both sides and the middle area of ​​the base 2, and the pad 41 is arranged along the width direction of the base 2, that is, the pad 41 is parallel to the width direction of the chassis part 5. When the inner cavity boss 51 of the chassis part 5 is set in the width direction of the chassis part 5, the clamping mechanism 4 set on both sides of the base 2 is used to press and clamp the inner cavity boss 51 of the chassis part 5. At this time, the side of the pressure plate 43 in the length direction presses on the inner cavity boss 51 of the chassis part 5. When the inner cavity boss 51 of the chassis part 5 is set in the length direction of the chassis part 5, the clamping mechanism 4 set in the middle area of ​​the base 2 is used to press and clamp the inner cavity boss 51 of the chassis part 5. At this time, the side of the pressure plate 43 in the width direction presses on the inner cavity boss 51 of the chassis part 5.

[0034] In one embodiment, the pad 41 is detachably connected to the top of the base 2 by a first hex screw 42, and the pressure plate 43 is detachably connected to the pad 41 by a second hex screw 44.

[0035] In one embodiment, the base 2 has a threaded hole 22 on its upper surface. A first hexagonal screw 42 engages with the threaded hole 22 to detachably connect the base 2 to the pad 41. One side of the base 2 has a first through hole 23, into which a bolt is installed. The bolt connects the base 2 to the dovetail block. The base 2 and the base plate 1 are connected via a dovetail groove or a pin, allowing for quick assembly and disassembly, and adapting to different turntable models.

[0036] In one embodiment, the middle area of ​​the base plate 1 is provided with a plurality of second through holes, which are arranged along the length of the base plate 1. The base 2 is fixed to the base plate 1 by the cooperation of the second through holes and the connector. The height of the base 2 relative to the fourth axis turntable is adjusted by selecting the second through holes at different positions.

[0037] In one embodiment, the base plate 1 uses a standard quick-change interface, compatible with different turntables and fixture extensions. The base 2 uses a standard quick-change interface, compatible with different turntables and fixture extensions.

[0038] In one embodiment, the positioning and clamping device is made of high-strength aluminum alloy 7075-T7451.

[0039] When using, please refer to Figure 9 and Figure 10The positioning and clamping device is mounted on the fourth-axis turntable via the base plate 1. The base plate 1 has four through holes, allowing adjustment of the height of the base 2 relative to the fourth-axis turntable according to the size of the part. When clamping the part, the relative positions of the locking mechanism 3 and the pressure plate 43, as well as the specifications of the locking block, pad 41, and pressure plate 43, are adjusted according to the size of the part. The part is placed on the base 2 or the pad 41, so that the locking mechanism 3 is located in the inner cavity of the part. The bidirectional screw 32 is rotated, which drives the slider 34 and the locking block to move to both sides, achieving self-locking and rapid release, thus achieving the purpose of clamping the inner cavity and automatically centering it. Then, the pressure plate 43 is installed on the pad 41, and the pressure plate 43 is used to fit against the inner cavity boss 51 of the part. The second internal hexagonal screw 44 is rotated to fit against the pressure plate 43, thus achieving the purpose of clamping the part.

[0040] After processing, remove the second hexagonal screw 44 and take off the pressure plate 43. Rotate the double-ended screw 32 of the locking mechanism 3 to move the locking block, and then the part can be removed.

[0041] The embodiments provided by this utility model ensure uniform distribution of clamping force and prevent workpiece deformation by setting the locking mechanism 3 and the pressing mechanism 4 in linkage. Furthermore, the rigidity of the base 2 is optimized and it is mounted on the fourth axis turntable. The base plate 1 and the base 2 adopt standard quick-change interfaces, which are compatible with different turntables and fixture extensions. This achieves efficient, high-precision, and rapid positioning and clamping of the workpiece in the chassis, and is especially suitable for brazing chassis with dimensional fluctuations, large geometric tolerances, or thin walls that are easily deformed.

[0042] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A positioning and clamping device for quick-access chassis-type parts, characterized in that, The base includes a base plate (1), a base (2), a locking mechanism (3), and a pressing mechanism (4). One side of the base plate (1) is fixedly connected to the fourth axis turntable. The other side of the base plate (1) is provided with a first dovetail groove. The axis of the first dovetail groove is parallel to the length direction of the base plate (1). One side of the base (2) is fixedly connected with a dovetail block that mates with the first dovetail groove. The base (2) and the base plate (1) are slidably connected through the mating of the dovetail block and the first dovetail groove. The upper part of the component is detachably connected to a locking mechanism (3) and a pressing mechanism (4). Both the locking mechanism (3) and the pressing mechanism (4) are located inside the chassis part (5). The locking mechanism (3) and the pressing mechanism (4) are alternately arranged. The pressing mechanism (4) is close to the side wall of the chassis part (5). The two sides of the locking mechanism (3) apply radial clamping force to the side wall of the chassis part (5). The pressing mechanism (4) is attached to and pressed against the inner cavity boss (51) of the chassis part (5).

2. The positioning and clamping device for quick-access chassis parts according to claim 1, characterized in that, The locking mechanism (3) includes a bidirectional screw (32), a slider (34), a locking slider (36), and a locking block. A second dovetail groove (21) is provided on the top of the base (2). The axis of the second dovetail groove (21) is perpendicular to the axis of the first dovetail groove. The bidirectional screw (32) is detachably connected to the second dovetail groove (21). The bidirectional screw (32) has bidirectional threads, and a slider (34) and a locking slider (36) are fitted onto each thread. (36) is located outside the slider (34). The slider (34) and the bidirectional screw (32) adopt a ball screw structure. The locking slider (36) and the bidirectional screw (32) are connected through the light hole on the locking slider (36). A locking block is fixedly connected to the upper side of each locking slider (36). By rotating the bidirectional screw (32), the slider (34) drives the locking block to move toward the side wall of the chassis part (5). The locking block applies a radial clamping force to the side wall of the chassis part (5).

3. The positioning and clamping device for quick-access chassis parts according to claim 2, characterized in that, The locking block is configured as a wedge-angle locking block (31).

4. The positioning and clamping device for quick-access chassis parts according to claim 3, characterized in that, The wedge angle of the wedge locking block (31) is set to 15°~20°.

5. The positioning and clamping device for quick-access chassis parts according to claim 2, characterized in that, The locking mechanism (3) further includes a limiting block (35) for limiting the locking slider (36), and the limiting block (35) is disposed at both ends of the second dovetail groove (21).

6. The positioning and clamping device for quick-access chassis parts according to claim 2, characterized in that, The slider (34) is provided with a lubricating coating, which is used to reduce the friction caused by the bidirectional screw (32).

7. The positioning and clamping device for quick-access chassis parts according to claim 1, characterized in that, The pressing mechanism (4) includes a pad (41) and a pressure plate (43). The pad (41) is detachably connected to the top of the base (2). The length direction of the pad (41) is perpendicular to the axis of the first dovetail groove. The pressure plate (43) is detachably connected to the upper side of the pad (41). The pressure plate (43) is attached to and pressed against the inner cavity boss (51) of the chassis part (5).

8. The positioning and clamping device for quick-access chassis parts according to claim 7, characterized in that, The pad (41) is detachably connected to the top of the base (2) by a first hex screw (42), and the pressure plate (43) is detachably connected to the pad (41) by a second hex screw (44).

9. The positioning and clamping device for quick-access chassis parts according to claim 8, characterized in that, The base (2) has a threaded hole (22) on its top. The base (2) and the pad (41) are detachably connected by the first internal hex screw (42) and the threaded hole (22). The base (2) has a first through hole (23) on one side. A bolt is provided in the first through hole (23). The base (2) is connected to the dovetail block by the bolt.

10. The positioning and clamping device for quick-access chassis parts according to claim 1, characterized in that, The middle area of ​​the base plate (1) is provided with multiple second through holes. The multiple second through holes are arranged along the length direction of the base plate (1). The base (2) is fixed on the base plate (1) by the cooperation of the second through holes and the connecting parts. The height of the base (2) relative to the fourth axis turntable is adjusted by selecting the second through holes at different positions.

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