A connecting rod cam clamping device

Abstract

The present application relates to a kind of connecting rod cam clamping devices, including base;Connecting rod mechanism, it includes guide shaft and the multiple connectors of the axial distribution along guide shaft, one end of multiple connectors is equipped with strip sliding hole, and multiple connectors are slidably connected base, guide shaft extends along first direction and is slidably connected base, and the junction of guide shaft and base is equipped with first elastic element, guide shaft is equipped with multiple non-parallel push rods along its axial direction, push rod is matched with strip sliding hole and push rod is inserted in strip sliding hole;Clamping block, multiple clamping blocks are respectively connected on the other end of multiple connectors, and multiple clamping blocks are arranged around the free end of guide shaft;Push rod slides along strip sliding hole and pushes multiple connectors to move perpendicularly to first direction, so that multiple clamping blocks are mutually close from multiple directions to clamp workpiece;The present application can realize workpiece fast clamping positioning without the aid of external power source, simple operation, effectively reduce cost.

Description

Technical Field

[0001] This invention relates to the field of positioning fixture technology, and in particular to a connecting rod cam clamping device. Background Technology

[0002] In existing clamping devices, an external power source is usually required to drive the mechanism to clamp the workpiece. Such clamping and positioning operations involve many steps, are inefficient, have high device costs, and continuously consume energy, resulting in high maintenance costs. Purely mechanical clamping methods have the problem of difficulty in removing the workpiece. Existing purely mechanical clamping methods clamp the workpiece from both sides using rotating clamping arms, which has the problem of low clamping accuracy. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the clamping device in the prior art is driven by an external power source, resulting in high energy consumption and high operating cost. The present invention provides a linkage cam clamping device that can achieve rapid clamping and positioning without the need for an external power source and is simple to operate.

[0004] To solve the above-mentioned technical problems, the present invention provides a connecting rod cam clamping device, comprising,

[0005] Base;

[0006] A linkage mechanism includes a guide shaft and a plurality of connecting members distributed along the axial direction of the guide shaft. One end of each of the plurality of connecting members is provided with a strip-shaped sliding hole, and the plurality of connecting members are slidably connected to the base. The guide shaft extends along a first direction and is slidably connected to the base. A first elastic element is provided at the connection between the guide shaft and the base. The guide shaft is provided with a plurality of non-parallel push rods along its axial direction. The push rods are matched with the strip-shaped sliding holes and are inserted into the strip-shaped sliding holes.

[0007] Clamping blocks, wherein multiple clamping blocks are respectively connected to the other end of multiple connectors, and the multiple clamping blocks are arranged around the free end of the guide shaft;

[0008] Wherein, the length direction of the strip-shaped sliding hole forms an acute angle with the axial direction of the guide shaft. When the workpiece applies pressure to the guide shaft along the first direction, the push rod slides along the strip-shaped sliding hole and pushes the plurality of connecting parts to move perpendicular to the first direction, so that the plurality of clamping blocks approach each other from multiple directions to clamp the workpiece.

[0009] In one embodiment of the present invention, the base includes a support platform and a base plate supporting the support platform. The support platform has a guide hole in the middle. The free end of the guide shaft passes through the guide hole. A plurality of clamping blocks are located on the surface of the support platform. The plurality of clamping blocks are respectively arranged around the guide hole along a second direction and a third direction.

[0010] In one embodiment of the present invention, the plurality of clamping blocks include fixed clamping blocks and movable clamping blocks arranged opposite each other, wherein the fixed clamping blocks are fixedly connected to the support platform and the movable clamping blocks are connected to the connector.

[0011] In one embodiment of the present invention, the bottom of the support platform is provided with a first slide rail extending along a second direction, and the plurality of connecting members include a first connecting member, the first connecting member being slidably connected to the first slide rail, and the first direction being perpendicular to the second direction.

[0012] In one embodiment of the present invention, the substrate is provided with a second slide rail extending along the third direction, and the connector further includes a second connector that is slidably connected to the second slide rail, wherein the first direction is perpendicular to the third direction.

[0013] In one embodiment of the present invention, a third slide rail disposed on the substrate and a slide block slidably connected to the third slide rail are further included. The third slide rail extends perpendicular to the first direction. The slide block is also connected to the substrate by a second elastic element. The slide block is fixedly connected to a locking block. The locking block is located in a first position or a second position. The locking block is provided with an inclined surface and a flat surface. When the locking block is located in the second position, the inclined surface or the flat surface abuts against the first limiting member of the guide shaft along the first direction.

[0014] In one embodiment of the invention, an unlocking mechanism is also included, which includes an unlocking button and a cam assembly connected to the locking block. The unlocking button is located on the support platform. By pressing down the unlocking button, the cam assembly drives the slide to move, so that the locking block moves from the second position to the first position.

[0015] In one embodiment of the present invention, the guide shaft is further provided with a second limiting member, the first elastic element is sleeved on the guide shaft and one end of the first elastic element abuts against the substrate, and the other end abuts against the second limiting member.

[0016] In one embodiment of the present invention, the bottom of the support platform is provided with a fourth slide rail extending along the third direction, and the second connector is also slidably connected to the fourth slide rail.

[0017] In one embodiment of the present invention, each of the plurality of connectors is provided with a mounting groove, and the mounting groove is provided with a through strip-shaped sliding hole on both sides, and the guide shaft passes through the mounting groove.

[0018] In one embodiment of the present invention, a plurality of side plates are connected around the substrate, and the plurality of side plates support the support platform. The substrate, the plurality of side plates and the support platform form a box, and the linkage mechanism is disposed inside the box.

[0019] In one embodiment of the present invention, the movable clamping block is provided with a plurality of buffer heads, and the buffer heads are connected to the movable clamping block through elastic elements.

[0020] In one embodiment of the present invention, both the first push rod and the second push rod are perpendicular to the guide shaft, and the first push rod and the second push rod are perpendicular to each other.

[0021] The technical solution of the present invention has the following advantages compared with the prior art:

[0022] The linkage cam clamping device of this invention applies force to the free end of the guide shaft along the direction of gravity. The gravity of the workpiece drives the guide shaft to descend. The vertical movement of the guide shaft is converted into multiple connecting parts moving horizontally in multiple directions using a linkage mechanism. This drives multiple clamping blocks to approach and clamp the workpiece, achieving rapid clamping and positioning of the workpiece without relying on an external power source, effectively reducing costs. Furthermore, the restoring force of the first elastic element drives the guide shaft to rise, thereby driving multiple clamping blocks away from and releasing the workpiece, making disassembly convenient. The multiple connecting parts moving horizontally in multiple directions to clamp the workpiece, using a rotational clamping method, improves clamping accuracy and expands the applicability of the device. Attached Figure Description

[0023] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the linkage mechanism of the linkage cam clamping device described in this invention.

[0025] Figure 2 This is a schematic diagram of the connecting rod cam clamping device of the present invention.

[0026] Figure 3 This is a schematic diagram of the connecting rod cam clamping device of the present invention, excluding the side plate.

[0027] Figure 4 for Figure 3 Another schematic diagram of the connecting rod cam clamping device shown.

[0028] Figure 5for Figure 3 The diagram shows the structure of the unlocking mechanism of the linkage cam clamping device.

[0029] Figure 6 for Figure 1 The diagram shows the structure of the second connecting member of the linkage mechanism.

[0030] Figure 7 for Figure 6 The diagram shows the structure of the strip-shaped sliding hole of the second connector.

[0031] Explanation of reference numerals in the accompanying drawings: 1. Base; 11. Base plate; 111. Second slide rail; 12. Support platform; 121. Clearance hole; 122. First slide rail; 123. Guide hole; 124. Fourth slide rail; 125. Connecting block; 13. Side plate; 2. Linkage mechanism; 21. Second connecting member; 211. Mounting groove; 221. Strip-shaped sliding hole; 221a. Upper end; 221b. Lower end; 22. First connecting member; 221. Strip-shaped sliding hole; 23. Guide shaft; 231. First limiting member; 232. Second limiting member. Components; 233, First push rod; 234, Second push rod; 24, First elastic element; 3, Unlocking mechanism; 31, Unlock button; 311, Cam; 32, Spring; 33, Third push rod; 331, Semi-circular head; 34, Fixed seat; 35, Rotating shaft; 36, Slide; 361, Groove; 37, Third slide rail; 38, Locking block; 381, Inclined surface; 39, Second elastic element; 4, Second movable clamping block; 41, First movable clamping block; 42, First fixed clamping block; 43, Second fixed clamping block. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0033] Example

[0034] Reference Figure 1 , 2 As shown in Figure 4, in one embodiment of the present invention, a connecting rod cam clamping device includes,

[0035] Base 1;

[0036] Linkage mechanism 2 includes a guide shaft 23 and two connecting members distributed along the axial direction of the guide shaft 23. The two connecting members are perpendicular to the guide shaft 23. Each of the two connecting members has a strip-shaped sliding hole 221 at one end. The strip-shaped sliding hole 221 is a through hole that is elongated in the middle and has semi-circular grooves at both ends. Both connecting members are slidably connected to the base 1. The guide shaft 23 extends along a first direction and is slidably connected to the base 1. A first elastic element 24 is provided at the connection between the guide shaft 23 and the base 1. The first elastic element 24 is used to drive the guide shaft 23 to automatically reset. Two non-parallel push rods are fixedly provided along the axial direction of the guide shaft 23. The rod matches the strip-shaped sliding hole 221 and the push rod is inserted into the strip-shaped sliding hole 221. The diameter of the push rod is equal to or slightly smaller than the width of the strip-shaped sliding hole 221. When the guide shaft 23 moves along its axial direction, the guide shaft 23 drives the push rod to move. The push rod uses the horizontal component force to push the two connecting parts to move horizontally and slide relative to the strip-shaped sliding hole 221. The first elastic element 24 is preferably a spring. The elastic force of the first elastic element 24 is large enough to drive the workpiece on the guide shaft end. In other embodiments, the connecting parts and push rods can be set to three, four or even more, and cooperate with more slide rails and clamping blocks, so that the workpiece can be clamped from more directions.

[0037] Clamping blocks, a plurality of clamping blocks are respectively connected to the other end of a plurality of connecting members, and the plurality of clamping blocks are arranged around the free end of the guide shaft 23, and the plurality of clamping blocks and the workpiece are all located on the same plane;

[0038] Wherein, the length direction of the strip-shaped sliding hole 221 is at an acute angle to the axial direction of the guide shaft 23. When the workpiece applies pressure to the guide shaft 23 along the first direction, the guide shaft 23 drives the push rod to descend. The push rod slides along the strip-shaped sliding hole 221 and pushes the two connecting parts to move perpendicular to the first direction, so that the plurality of clamping blocks approach each other from multiple directions to clamp the workpiece.

[0039] In one embodiment of the present invention, reference is made to... Figure 4 As shown, the base 1 includes a support platform 12 and a base plate 11 supporting the support platform 12. The support platform 12 is used to support the workpiece. A guide hole 123 is provided in the middle of the support platform 12. The free end of the guide shaft 23 passes through the guide hole 123. When the workpiece is placed on the support platform 12, the workpiece presses the free end of the guide shaft 23 into the guide hole 123 by gravity. A plurality of clamping blocks are located on the surface of the support platform 12. The plurality of clamping blocks pass through the clearance holes 121 on the support platform 12 and are connected to a plurality of connectors. The plurality of clamping blocks are respectively arranged around the guide hole 123 along a second direction and a third direction. The first direction is Z, i.e., the vertical direction; the second direction is Y and the third direction is X, both of which are horizontal directions.

[0040] In one embodiment of the present invention, reference is made to... Figure 2 As shown, the plurality of clamping blocks include two first fixed clamping blocks 42 and two first movable clamping blocks 41 arranged opposite each other, and two second fixed clamping blocks 43 and two second movable clamping blocks 4 arranged opposite each other. The two first fixed clamping blocks 42 and the two second fixed clamping blocks 43 are fixedly connected to the support platform 12, and the two first movable clamping blocks 41 and the two second movable clamping blocks 4 are respectively connected to the two connecting members. The two first fixed clamping blocks 42 and the two first movable clamping blocks 41 clamp the workpiece from a second direction, and the two second fixed clamping blocks 43 and the two second movable clamping blocks 4 clamp the workpiece from a third direction.

[0041] In one embodiment of the present invention, reference is made to... Figure 4 As shown, the bottom of the support platform 12 is fixedly connected to a first slide rail 122 extending along the second direction. The two connecting members include a first connecting member 22. The first connecting member 22 is slidably connected to the first slide rail 122 by a slider. Two first movable clamping blocks 41 are connected to the first connecting member 22. The first slide rail 122 is used to improve the stability of the first connecting member 22 and the support platform 12, prevent the support platform 12 from moving, and guide the two first movable clamping blocks 41. The first direction is perpendicular to the second direction.

[0042] In one embodiment of the present invention, reference is made to... Figure 3 As shown, the substrate 11 is provided with a second slide rail 111 extending along the third direction. The two connecting members also include a second connecting member 21. The two second movable clamping blocks 4 are connected to the second connecting member 21. The second connecting member 21 is slidably connected to the second slide rail 111 by a slider. The second slide rail 111 is used to guide the two second movable clamping blocks 4. The first direction is perpendicular to the third direction.

[0043] In one embodiment of the present invention, reference is made to... Figure 3 , 5As shown, it also includes a third slide rail 37 disposed on the substrate 11 and a slide block 36 slidably connected to the third slide rail 37. The third slide rail 37 extends perpendicular to the first direction. In this embodiment, the third slide rail 37 extends along a third direction. The slide block 36 is also connected to the fixed seat 34 of the substrate 11 by a second elastic element 39. The slide block 36 is fixedly connected to a locking block 38. The locking block 38 is located in a first position or a second position. The locking block 38 is provided with an inclined surface 381 and a plane opposite to each other along the first direction. The plane is located on the side closer to the substrate 11. When the locking block 38 is located in the second position, the inclined surface 381 or the plane abuts against the first limiting member 231 of the guide shaft 23 along the first direction. When the plane abuts against the first limiting member 231, the locking block 38 blocks the guide shaft 23 from moving towards the support platform 12. When located in the first position, the locking block 38 does not contact the first limiting member 231. The second elastic element 39 is preferably a spring.

[0044] In one embodiment of the present invention, reference is made to... Figure 5 As shown, in order to quickly unlock the locking block 38, an unlocking mechanism 3 is also included, which includes an unlocking button 31 and a cam 311 assembly connected to the locking block 38. The unlocking button 31 is a rod-shaped structure with one end protruding from the support platform 12. The unlocking button 31 is slidably connected to the fixed base 34 in a first direction. A spring 32 is provided between the unlocking button 31 and the fixed base 34 so that the unlocking button 31 can automatically reset. The cam 311 assembly includes a third push rod 33 slidably connected to the fixed base 34 in a third direction, and a rotating shaft 35 rotatably connected to the fixed base 34. Both ends of the third push rod 33 are set as semi-circular heads 331 and respectively abut against one end of the rotating shaft 35 and the cam 311 of the unlock button 31. The other end of the rotating shaft 35 is inserted into the groove 361 of the slide block 36. By pressing down the unlock button 31, the cam 311 is driven to descend, so that the cam 311 drives the third push rod 33 to move. The third push rod 33 drives the rotating shaft 35 to rotate. The other end of the rotating shaft 35 drives the slide block 36 to move, so that the locking block 38 moves from the second position to the first position, and the locking block 38 releases the restriction on the guide shaft 23.

[0045] In one embodiment of the present invention, reference is made to... Figure 1 As shown, the guide shaft 23 is also provided with a second limiting member 232, and the first elastic element 24 is sleeved on the guide shaft 23, with one end of the first elastic element 24 abutting against the substrate 11 and the other end abutting against the second limiting member 232.

[0046] In one embodiment of the present invention, reference is made to... Figure 4As shown, the bottom of the support platform 12 is fixedly connected to a fourth slide rail 124 extending along the third direction. The second connecting member 21 is also slidably connected to the fourth slide rail 124 via a slider. The slider is fixedly connected to the connecting block 125. The connecting block 125 is connected to the second connecting member 21. Since the pressure of the first movable clamping block 41 when clamping the workpiece causes the support platform 12 to move horizontally, resulting in a decrease in positioning accuracy, the fourth slide rail 124 is not only used to guide the second movable clamping block 41, but also to provide a reverse support force for the support platform 12 to prevent the support platform 12 from moving horizontally.

[0047] In one embodiment of the present invention, reference is made to... Figure 6 As shown, to prevent the two connectors from shifting or wobbling, both connectors are provided with mounting grooves 211. The mounting grooves 211 are provided with through-holes 221 on both sides. The guide shaft 23 passes through the mounting grooves 211, and the two ends of the first push rod 233 and the second push rod 234 on the guide shaft 23 are inserted into the through-holes 221 on both sides.

[0048] In one embodiment of the present invention, reference is made to... Figure 2 As shown, it also includes four side plates 13 fixedly connected around the base plate 11, and the four side plates 13 support the bottom of the support platform 12. The base plate 11, the four side plates 13 and the support platform 12 form a box, and the linkage mechanism 2 is disposed inside the box.

[0049] In one embodiment of the present invention, reference is made to... Figure 1 As shown, each of the first movable clamping block 41 and the second movable clamping block 4 is provided with two buffer heads. The buffer heads are connected to the movable clamping blocks through elastic elements. The buffer heads are used to reduce the error of the first movable clamping block 41 and the second movable clamping block 4.

[0050] In one embodiment of the present invention, reference is made to... Figure 1 As shown, both the first push rod 233 and the second push rod 234 are perpendicular to the guide shaft 23, and the first push rod 233 and the second push rod 234 are perpendicular to each other.

[0051] The working principle of the connecting rod cam clamping device of the present invention is as follows:

[0052] The workpiece is placed in the middle of the support platform 12, ensuring that the bottom surface of the workpiece is in close contact with the surface of the support platform 12. Using the weight of the workpiece or by manually pressing it down, the bottom surface of the workpiece pushes the guide shaft 23 downwards. The guide shaft 23 drives the first push rod 233 and the second push rod 234 to move downwards. The first push rod 233 and the second push rod 234 respectively push the first connecting piece 22 and the second connecting piece 21 to move along the second direction and the third direction, respectively. The first push rod 233 and the second push rod 234 slide from the upper end to the lower end relative to their respective strip-shaped sliding holes 221. The first connecting piece 22 drives the first movable clamping block 41 to move towards the first fixed clamping block 42 and clamp the workpiece along the second direction. The second connecting piece 21 drives the second movable clamping block 41 towards the second fixed clamping block 42. The clamping block 43 moves and clamps the workpiece along a third direction. At the same time, the first limiting member 231 presses down the locking block 38. The locking block 38 slides along the third slide rail 37 to avoid the first limiting member 231. When the first limiting member 231 descends below the locking block 38, the second elastic element 39 pushes the locking block 38 to reset and abut against the first limiting member 231 to lock the guide shaft 23. The clamping block is positioned. When disassembling, the unlocking button 31 is pressed down. The cam 311 assembly drives the locking block 38 to move from the second position to the first position. The first elastic element 24 uses its elastic force to drive the guide shaft 23 to rise, so that the first movable clamping block 41 moves away from the first fixed clamping block 42, and the second movable clamping block 4 moves away from the second fixed clamping block 43, thus releasing the workpiece positioning.

[0053] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A connecting rod cam clamping device, characterized in that, include, The base includes a support platform and a base plate supporting the support platform, and a slide is provided on the base plate; A linkage mechanism includes a guide shaft and a plurality of connecting members distributed along the axial direction of the guide shaft. One end of each of the plurality of connecting members is provided with a strip-shaped sliding hole, and the plurality of connecting members are slidably connected to the base. The guide shaft extends along a first direction and is slidably connected to the base. A first elastic element is provided at the connection between the guide shaft and the base. The guide shaft is provided with a plurality of non-parallel push rods along its axial direction. The push rods are matched with the strip-shaped sliding holes and are inserted into the strip-shaped sliding holes. Clamping blocks, wherein multiple clamping blocks are respectively connected to the other end of multiple connectors, and the multiple clamping blocks are arranged around the free end of the guide shaft; Wherein, the length direction of the strip-shaped sliding hole forms an acute angle with the axial direction of the guide shaft. When the workpiece applies pressure to the guide shaft along the first direction, the push rod slides along the strip-shaped sliding hole and pushes the plurality of connecting parts to move perpendicular to the first direction, so that the plurality of clamping blocks approach each other from multiple directions to clamp the workpiece. The unlocking mechanism includes an unlocking button and a cam assembly connected to a locking block. The unlocking button is located on the support platform. The slide is fixedly connected to the locking block, which is located in a first position or a second position. The locking block is provided with an inclined surface and a flat surface. When the locking block is located in the second position, the inclined surface or the flat surface abuts against the first limiting member of the guide shaft along the first direction. The cam assembly includes a third push rod that is slidably connected to a fixed base along a third direction, and a rotating shaft that is rotatably connected to the fixed base. Both ends of the third push rod are set as semi-circular heads and respectively abut against one end of the rotating shaft and the cam of the unlocking button. The other end of the rotating shaft is inserted into the groove of the slide. By pressing down the unlocking button, the cam is driven to descend, causing the cam to drive the third push rod to move. The third push rod drives the rotating shaft to rotate, and the other end of the rotating shaft drives the slide to move, causing the locking block to move from the second position to the first position, and the locking block releases the restriction on the guide shaft.

2. The connecting rod cam clamping device according to claim 1, characterized in that, The support platform has a guide hole in the middle, the free end of the guide shaft passes through the guide hole, and a plurality of clamping blocks are located on the surface of the support platform. The plurality of clamping blocks are respectively arranged around the guide hole along the second direction and the third direction.

3. The connecting rod cam clamping device according to claim 2, characterized in that, The plurality of clamping blocks include fixed clamping blocks and movable clamping blocks arranged opposite each other, wherein the fixed clamping blocks are fixedly connected to the support platform and the movable clamping blocks are connected to the connector.

4. The connecting rod cam clamping device according to claim 2, characterized in that, The bottom of the support platform is provided with a first slide rail extending along a second direction, and the plurality of connecting members include a first connecting member, which is slidably connected to the first slide rail, and the first direction is perpendicular to the second direction.

5. A connecting rod cam clamping device according to claim 3, characterized in that, The substrate is provided with a second slide rail extending along the third direction, and the connector further includes a second connector that is slidably connected to the second slide rail. The first direction is perpendicular to the third direction.

6. A connecting rod cam clamping device according to claim 2, characterized in that, The substrate is provided with a third slide rail and a slide block slidably connected to the third slide rail. The third slide rail extends in a direction perpendicular to the first direction, and the slide block is connected to the substrate by a second elastic element.

7. A connecting rod cam clamping device according to claim 2, characterized in that, The guide shaft is also provided with a second limiting member. The first elastic element is sleeved on the guide shaft and one end of the first elastic element abuts against the substrate, while the other end abuts against the second limiting member.

8. A connecting rod cam clamping device according to claim 5, characterized in that, The bottom of the support platform is provided with a fourth slide rail extending along the third direction, and the second connector is also slidably connected to the fourth slide rail.

9. A connecting rod cam clamping device according to claim 1, characterized in that, Each of the connectors is provided with a mounting groove, and a through-hole strip is provided on both sides of the mounting groove, through which the guide shaft passes.

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