Positioning clamp with auxiliary clamping function

Abstract

The utility model relates to a positioning fixture with an auxiliary clamping function, which comprises a support frame, a pressing component, an auxiliary clamping component and two positioning supports, the auxiliary clamping component is fixedly mounted on the support frame, and the two positioning supports are fixedly mounted on the auxiliary clamping component. The two positioning supports are fixedly installed on the supporting frame and located on the left side and the right side of the auxiliary clamping assembly respectively, and the pressing assembly is fixedly installed on the supporting frame and located on the outer side of the auxiliary clamping assembly. After the scheme is adopted, centering can be automatically completed according to the shape of a workpiece in the clamping process during positioning and clamping operation, the problem that the workpiece is damaged or loosened in the clamping process is effectively solved, and the safety and the stability of the positioning clamp in the using process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning fixtures, in particular to a positioning fixture with an auxiliary clamping function. Background Art

[0002] With the development of modern industrial production technology, especially the increasing demand for precision manufacturing and automated production lines, positioning fixtures, as key equipment to ensure the precise position and stability of workpieces, play a vital role in product processing and assembly. With the continuous advancement of manufacturing technology, higher requirements are placed on the positioning accuracy and clamping stability of fixtures.

[0003] However, the clamping structure of traditional positioning fixtures cannot achieve automatic centering. When positioning and clamping complex workpieces with different geometric shapes, it is sometimes difficult to apply the clamping force evenly. This may cause local overload deformation or damage to the workpiece, or unstable clamping in certain parts, affecting the processing accuracy and stability, and may even cause the workpiece to fly out during processing, posing a major safety hazard. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a positioning fixture with an auxiliary clamping function, which can automatically complete centering according to the shape of the workpiece during the clamping process, effectively solve the problem of damage to the workpiece or loose clamping during the clamping process, and improve the safety and stability of the positioning fixture during use.

[0005] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0006] A positioning fixture with an auxiliary clamping function comprises a support frame, a clamping assembly, an auxiliary clamping assembly and a positioning support, wherein the auxiliary clamping assembly is fixedly mounted on the support frame, and two positioning supports are provided, the two positioning supports are fixedly mounted on the support frame and are respectively located on the left and right sides of the auxiliary clamping assembly, and the clamping assembly is fixedly mounted on the support frame and is located on the outside of the auxiliary clamping assembly.

[0007] Preferably, the auxiliary clamping assembly includes a cylinder, a positioning block, a movable limit block and a clamping claw, the cylinder is fixedly installed in the support frame, the positioning block is fixedly installed on the support frame, the piston rod of the cylinder is slidably matched with the positioning block, two clamping claws are provided, the lower ends of the two clamping claws are respectively rotatably connected to the positioning block, grooves are provided on the inner side surfaces of the lower ends of the two clamping claws, the lower end of the movable limit block is rotatably connected to the piston rod of the cylinder, the left and right ends of the movable limit block are respectively located in the grooves, the left and right ends of the movable limit block can swing up and down in the groove under the drive of the cylinder, and the movable limit block is provided with a protrusion, which can fit with the upper and lower inner walls of the groove.

[0008] Preferably, it also includes a hemispherical protrusion block, which is fixedly mounted on the inner side surface of the upper end of the clamping claw.

[0009] Preferably, the clamping assembly comprises a clamping cylinder and a clamping block, the clamping cylinder is fixedly mounted on the support frame, and the clamping block is rotatably connected to a piston rod of the clamping cylinder.

[0010] Preferably, a plurality of the clamping assemblies are provided, and the plurality of the clamping assemblies are distributed around the center of the auxiliary clamping assembly.

[0011] The beneficial effect of the utility model is that when it is necessary to clamp and position the workpiece, first the pressure block in the clamping assembly is lifted, the clamping claw of the auxiliary clamping assembly is opened, and then the workpiece is placed on the support frame, and the bottom of the workpiece is pressed against the positioning support; thereafter, the pressure block in the clamping assembly is pressed down to clamp the workpiece, and then the clamping claw in the auxiliary clamping assembly is closed, and during the closing process, the clamping claw is automatically centered by the movable limit block, ensuring that the clamping force of all directions on the workpiece is evenly distributed during the clamping process. In this way, during the positioning and clamping operation, the centering can be automatically completed according to the shape of the workpiece during the clamping process, effectively solving the problem of damage or loose clamping during the clamping process of the workpiece, and improving the safety and stability during the use of the positioning fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0013] Figure 1 This is a structural schematic diagram of the positioning fixture with auxiliary clamping function of the utility model;

[0014] Figure 2 This is a structural schematic diagram of the auxiliary clamping assembly in the positioning fixture with auxiliary clamping function of the utility model;

[0015] Figure 3This is a schematic diagram of the structure of the positioning block and the clamping claw in the positioning fixture with auxiliary clamping function of the utility model;

[0016] Figure 4 This is a structural schematic diagram of a movable limit block in a positioning fixture with auxiliary clamping function according to the utility model;

[0017] Figure 5 This is a schematic diagram of the open state of the auxiliary clamping component in the positioning fixture with auxiliary clamping function of the utility model.

[0018] in:

[0019] 1- Support frame;

[0020] 2-pressing assembly; 21-pressing cylinder; 22-pressing block;

[0021] 3- auxiliary clamping assembly; 31- cylinder; 32- positioning block; 33- movable limit block; 331- convex block; 34- clamping claw; 341- groove; 35- hemispherical convex block;

[0022] 4- Positioning support. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] In the description of the present invention, it is necessary to understand that the directions and positional relationships indicated by “up”, “down”, “left”, “right”, “front”, “back”, “vertical”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figures 1 to 5 As shown,

[0026] A positioning fixture with an auxiliary clamping function includes a support frame 1, a clamping assembly 2, an auxiliary clamping assembly 3 and a positioning support 4. The auxiliary clamping assembly 3 is fixedly mounted on the support frame 1. Two positioning supports 4 are provided. The two positioning supports 4 are fixedly mounted on the support frame 1 and are respectively located on the left and right sides of the auxiliary clamping assembly 3. The clamping assembly 2 is fixedly mounted on the support frame 1 and is located on the outside of the auxiliary clamping assembly 3.

[0027] In this way, when it is necessary to clamp and position the workpiece, first the pressure block 22 in the clamping assembly 2 is lifted, the clamping claw 34 of the auxiliary clamping assembly 3 is opened, and then the workpiece is placed on the support frame 1, and the bottom of the workpiece is pressed against the positioning support 4; thereafter, the pressure block 22 in the clamping assembly 2 is pressed down to clamp the workpiece, and then the clamping claw 34 in the auxiliary clamping assembly 3 is closed, and during the closing process, the clamping claw 34 is automatically centered by the movable limit block 33, ensuring that the clamping force of all directions on the workpiece is evenly distributed during the clamping process. In this way, during the positioning and clamping operation, the centering can be automatically completed according to the shape of the workpiece during the clamping process, which effectively solves the problem of damage or loose clamping during the clamping process of the workpiece, and improves the safety and stability of the positioning fixture during use.

[0028] In addition, the auxiliary clamping assembly 3 includes a cylinder 31, a positioning block 32, a movable limit block 33 and a clamping claw 34. The cylinder 31 is fixedly installed in the support frame 1, the positioning block 32 is fixedly installed on the support frame 1, the piston rod of the cylinder 31 is slidably matched with the positioning block 32, and two clamping claws 34 are provided. The lower ends of the two clamping claws 34 are respectively rotatably connected to the positioning block 32, and grooves 341 are provided on the inner side surfaces of the lower ends of the two clamping claws 34. The lower end of the movable limit block 33 is rotatably connected to the piston rod of the cylinder 31, and the left and right ends of the movable limit block 33 are respectively located in the groove 341. The left and right ends of the movable limit block 33 can swing up and down in the groove 341 under the drive of the cylinder 31, and a protrusion 331 is provided on the movable limit block 33, and the protrusion 331 can fit with the upper and lower inner walls of the groove 341. Specifically, the protrusions 331 are distributed on the upper and lower surfaces of the left and right ends of the movable limit block 33 , and the openings of the grooves 341 at the lower ends of the two clamping claws 34 are arranged opposite each other, so that the left and right ends of the movable limit block 33 are just restricted in the grooves 341 .

[0029] In this way, when the clamping claw 34 is in the open state, the piston rod of the cylinder 31 is in the extended state. Since the range of movement of the left and right ends of the movable limit block 33 is limited in the groove 341, the protrusion 331 fixed on the upper end of the movable limit block 33 will abut against the upper inner wall of the groove 341, so that the clamping claw 34 always remains in the open state; when the clamping claw 34 needs to be closed, the piston rod of the cylinder 31 contracts, thereby driving the movable limit block 33 to move downward, and the protrusion 331 at the lower end of the movable limit block 33 will drive the clamping claw 34 to move downward after hitting the lower inner wall of the groove 341. 4 rotates so that the upper end of the clamping claw 34 moves closer to the workpiece; when the upper end of one of the clamping claws 34 abuts against the workpiece, the protrusion 331 on this side abuts against the groove 341 of the clamping claw 34, so that the clamping claw 34 maintains the current clamping state, and since the movable limit block 33 can rotate, the protrusion 331 on the other side automatically adjusts its position so that the protrusion 331 on this side automatically abuts against the lower inner wall of the groove 341 of the other clamping claw 34, thereby making the upper end of the other clamping claw 34 abut against the workpiece, thereby realizing automatic centering and completing the auxiliary clamping of the workpiece.

[0030] In addition, it also includes a hemispherical protrusion block 35 , which is fixedly mounted on the inner side surface of the upper end of the clamping claw 34 .

[0031] In this way, when the clamping jaw 34 contacts the workpiece, the hemisphere can serve as a guide point to help the clamping jaw 34 quickly and accurately find the correct position, thereby improving work efficiency and accuracy, while also avoiding scratching the workpiece.

[0032] In addition, the pressing assembly 2 includes a pressing cylinder 21 and a pressing block 22 . The pressing cylinder 21 is fixedly mounted on the support frame 1 , and the pressing block 22 is rotatably connected to the piston rod of the pressing cylinder 21 .

[0033] In this way, the workpiece can be pressed tightly to prevent it from shifting during processing.

[0034] In addition, a plurality of clamping assemblies 2 are provided, and the plurality of clamping assemblies 2 are distributed around the center of the auxiliary clamping assembly 3. Specifically, the distribution of the clamping assemblies 2 is distributed according to the shape of the workpiece and the processing requirements.

[0035] Like this, the applicable scope of this device is expanded.

[0036] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning fixture with auxiliary clamping function, characterized in that: The invention comprises a support frame (1), a clamping assembly (2), an auxiliary clamping assembly (3) and a positioning support (4); the auxiliary clamping assembly (3) is fixedly mounted on the support frame (1); two positioning supports (4) are provided; the two positioning supports (4) are fixedly mounted on the support frame (1) and are respectively located on the left and right sides of the auxiliary clamping assembly (3); the clamping assembly (2) is fixedly mounted on the support frame (1) and is located on the outside of the auxiliary clamping assembly (3).

2. The positioning fixture with auxiliary clamping function according to claim 1, characterized in that: The auxiliary clamping assembly (3) comprises a cylinder (31), a positioning block (32), a movable limit block (33) and a clamping claw (34); the cylinder (31) is fixedly mounted in the support frame (1); the positioning block (32) is fixedly mounted on the support frame (1); the piston rod of the cylinder (31) is slidably matched with the positioning block (32); two clamping claws (34) are provided, and the lower ends of the two clamping claws (34) are respectively rotatably connected to the positioning block (32); the two clamping claws (34) are ) are provided with a groove (341) on the inner side surface of the lower end of the movable limit block (33), the lower end of the movable limit block (33) is rotatably connected to the piston rod of the cylinder (31), the left and right ends of the movable limit block (33) are respectively located in the groove (341), and the left and right ends of the movable limit block (33) can swing up and down in the groove (341) under the drive of the cylinder (31), and the movable limit block (33) is provided with a protrusion (331), and the protrusion (331) can fit with the upper and lower inner walls of the groove (341).

3. The positioning fixture with auxiliary clamping function according to claim 2, characterized in that: It also includes a hemispherical protrusion block (35), which is fixedly mounted on the inner side surface of the upper end of the clamping claw (34).

4. The positioning fixture with auxiliary clamping function according to claim 1, 2 or 3, characterized in that: The clamping assembly (2) comprises a clamping cylinder (21) and a clamping block (22); the clamping cylinder (21) is fixedly mounted on the support frame (1); and the clamping block (22) is rotatably connected to a piston rod of the clamping cylinder (21).

5. The positioning fixture with auxiliary clamping function according to claim 1, 2 or 3, characterized in that: The clamping assemblies (2) are provided in plurality, and the plurality of clamping assemblies (2) are distributed around the center of the auxiliary clamping assembly (3).

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