Workpiece fastening tool

Abstract

The utility model discloses a work piece fastening frock belongs to work piece clamp technical field, including box body and setting on the fastening mechanism and clamping mechanism of box body, the fastening mechanism includes hollow tube, lift column, clamping block, air pump and vent pipe, the hollow tube fixed connection in the box body top, lift column sliding connection in the hollow tube inner wall, the clamping block is connected in lift column far from the box body one end, the hollow tube inner wall is fixed with lug, the lift column outer wall is set up with half round arc slot, the vent pipe is linked with the hollow tube bottom in air pump, and air pump passes through vent pipe and sends gas. The utility model discloses a pneumatic drive's fastening mechanism is set up, and the lift column is driven to descend with air pump and sends gas, and through the half round arc slot on lift column and the lug cooperation of hollow tube inner wall, has solved the problem of tedious, time -consuming of fixing operation to work piece through multiple screws in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of workpiece clamping technology, and in particular to a workpiece fastening fixture. Background Technology

[0002] In the field of machining and assembly, reliable and stable fixation of workpieces is a key link to ensure machining accuracy and operational safety. Traditional workpiece fixing methods usually use bolts and nuts as mechanical fasteners to fix the workpieces to the worktable. Although this method can provide a certain clamping force, it has many inconveniences in actual operation.

[0003] Taking bolt fastening as an example, when multiple locations need to be tightened, operators need to manually tighten or loosen the bolts one by one. This not only consumes a lot of time and energy, but also reduces production efficiency and increases labor intensity, especially on production lines where workpieces need to be changed frequently. In addition, manual operation makes it difficult to ensure that the tightening force of each bolt is consistent, resulting in uneven stress on the workpiece, affecting processing accuracy, and even causing loosening during processing, which brings safety hazards.

[0004] With the continuous improvement of industrial automation, the market demand for efficient and convenient workpiece clamping technology is growing. Traditional bolt fastening methods can no longer meet the efficiency and precision requirements of modern industrial production.

[0005] Therefore, this utility model proposes a workpiece fastening fixture to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of existing workpiece fastening fixtures, such as the cumbersome and time-consuming use of multiple screws to fix the workpiece and the inconvenience of manually rotating the threaded clamps, this utility model aims to provide a workpiece fastening fixture with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a workpiece fastening fixture, including: a box and a fastening mechanism disposed on the box, the fastening mechanism including a hollow tube, a lifting column, a clamping block, an air pump and an air pipe; The hollow tube is fixedly connected to the top of the housing, the lifting column is slidably connected to the inner wall of the hollow tube, and the locking block is connected to the end of the lifting column away from the housing to abut against the workpiece. A protrusion is fixed to the inner wall of the hollow tube, and a semi-circular groove is formed on the outer wall of the lifting column to slide with the protrusion. Furthermore, the air pump is connected to the vent pipe, which in turn connects the air pump to the bottom of the hollow tube. The lifting column, hollow tube, locking block, air pump, and vent pipe are combined through sliding connection, sliding fit, and connection. When the air pump is working, it draws or delivers gas to the bottom of the hollow tube through the vent pipe, causing a change in the pressure difference inside the hollow tube. This drives the lifting column to rise and fall vertically inside the hollow tube. During the rising and falling process, the semi-circular groove on the outer wall of the lifting column slides into fit with the protrusion on the inner wall of the hollow tube, forcing the lifting column to rotate while moving vertically. The locking block presses down and rotates to contact the workpiece as the lifting column descends and rotates, achieving rapid and stable fastening.

[0008] Preferably, the fastening mechanism also includes multiple positioning blocks, which are fixedly connected to the top of the housing. Through the positioning blocks, the hollow tube is firmly fixed to the top of the housing, which is used to accurately position and support the hollow tube, ensuring the stability of the trajectory of the lifting column.

[0009] Preferably, the top of the clamping block is threadedly connected to the top of the lifting column via a nut. This threaded connection not only makes the installation and replacement of the clamping block more convenient, but also provides reliable mechanical connection strength when applying a tightening force to the workpiece, effectively preventing the clamping block from loosening under pressure, thereby ensuring the stability and safety of the tightening process.

[0010] Preferably, the workpiece fastening fixture also includes a clamping mechanism, which is mounted on the housing and works in conjunction with the fastening mechanism to clamp the workpiece laterally. The clamping mechanism includes a second positioning block and a support rod. The second positioning block is fixedly connected to the top of the housing, and the support rod is slidably connected to the inner wall of the second positioning block, providing lateral support and positioning for the workpiece in addition to vertical fastening, thus ensuring the multi-dimensional stability of the workpiece during the processing.

[0011] Preferably, one end of the support rod is fixedly connected to a bayonet for accommodating the workpiece, and the other end of the support rod away from the bayonet is fixedly connected to a ball, which serves as an operating handle, allowing the user to directly pull to control the opening and closing of the clamping mechanism and achieve quick loading and unloading of the workpiece.

[0012] Preferably, the clamping mechanism further includes a spring, which is sleeved on the outer wall of the support rod and its two ends abut against the rear side of the positioning block 2 and the rear side of the bayonet, respectively. The spring stores energy when the support rod is pulled and provides a restoring force after release, driving the bayonet to automatically clamp the workpiece, simplifying the operation steps and improving the operation efficiency.

[0013] Preferably, the fastening mechanism includes multiple fastening blocks, which act together on the top of the workpiece from different positions. This can evenly distribute the pressure on the workpiece, avoid deformation of the workpiece due to excessive local stress, and enhance the stability and reliability of the fastening.

[0014] Preferably, the air pump is located on the outer wall of the housing, and the air pipe is laid along the inner wall of the housing and connected to the bottom of multiple hollow pipes, which makes it convenient to maintain and repair the air pump. At the same time, hiding the air pipe inside the housing not only protects the pipeline from external damage, but also makes the overall tooling look neater and the structure more compact.

[0015] This utility model has the following beneficial effects: 1. This utility model, by setting up a pneumatically driven fastening mechanism, uses an air pump to pump gas to drive the lifting column to descend, and through the semi-circular arc groove on the lifting column and the protrusion on the inner wall of the hollow tube, the locking block rotates while being pressed down, which solves the problem of the cumbersome and time-consuming operation of fixing the workpiece with multiple screws in the prior art.

[0016] 2. This utility model, by setting a spring-reset clamping mechanism, uses the pulling of a ball to open the bayonet, and relies on the elastic force of the spring to automatically clamp after release, solves the problem of inconvenience of manual rotation thread clamping operation in the prior art, and improves the convenience of workpiece loading and unloading.

[0017] 3. This utility model achieves two coordinated fixing methods in different directions by combining the pneumatic pressing and rotation of the fastening mechanism with the automatic lateral clamping of the clamping mechanism by springs. This solves the limitations of a single fixing method in terms of efficiency or stability and can adapt to the workpiece clamping requirements in different processing scenarios. Attached Figure Description

[0018] Figure 1 This is a perspective view of a workpiece fastening fixture proposed in this utility model; Figure 2 This is a cross-sectional view of the housing of a workpiece fastening fixture proposed in this utility model; Figure 3 This is an exploded view of the fastening mechanism of a workpiece fastening fixture proposed in this utility model; Figure 4 For this Figure 3 A larger image is shown in section A; Figure 5 This is an exploded view of the clamping mechanism of a workpiece fastening fixture proposed in this utility model.

[0019] Legend: 1. Housing; 2. Fastening mechanism; 201. Air pump; 202. Vent pipe; 203. Hollow tube; 204. Lifting column; 205. Clamping block; 206. Positioning block one; 207. Nut; 208. Semi-circular arc groove; 209. Protrusion; 3. Clamping mechanism; 301. Positioning block two; 302. Ball; 303. Support rod; 304. Spring; 305. Bayonet; 4. Machined parts. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example

[0021] Please refer to Figures 1 to 5 This utility model provides a workpiece fastening fixture, which aims to solve the problems of the prior art where fixing workpieces with multiple screws is too cumbersome and time-consuming, and manual rotation of the threaded clamps is inconvenient.

[0022] like Figure 1 and Figure 2 As shown, the workpiece fastening fixture includes a housing 1, a fastening mechanism 2 and a clamping mechanism 3 disposed on the housing 1. The housing 1 serves as the mounting base and support structure for the entire fixture, providing internal space to accommodate and protect the various functional components. The fastening mechanism 2 is mainly used to vertically press and fasten the workpiece 4. The fastening mechanism 2 includes a hollow tube 203, a lifting column 204, a clamping block 205, an air pump 201, and an air pipe 202. Multiple hollow tubes 203 are fixedly connected to the top of the housing 1 by multiple positioning blocks 206. The positioning blocks 206 ensure the accurate installation and stable support of the hollow tubes 203 on the housing 1. The inner wall of each hollow tube 203 is slidably connected to a lifting column 204. The outer wall of the lifting column 204 is provided with a semi-circular arc groove 208. The inner wall of 3 is fixed with a protrusion 209, which slides with the semi-circular groove 208 on the outer wall of the lifting column 204, so that the lifting column 204 rotates at the same time when it moves vertically up and down in the hollow tube 203. The locking block 205 is connected to the end of the lifting column 204 away from the box 1, and is used to directly contact the workpiece 4 and apply pressure. The top of the locking block 205 is threadedly connected to the top of the lifting column 204 through a nut 207. The use of the nut 207 enhances the reliability and stability of the connection between the locking block 205 and the lifting column 204.

[0023] Reference Figure 2 and Figure 3An air pump 201 is installed on the outer wall of the housing 1 and is connected to the bottom of a hollow tube 203 via a vent pipe 202. The vent pipe 202 is laid along the inner wall of the housing 1 and connects to the bottom of multiple hollow tubes 203. When it is necessary to fasten the workpiece 4, the air pump 201 is activated, drawing gas from the bottom of the hollow tube 203 to create a negative pressure inside the hollow tube 203. Under the action of external atmospheric pressure, the lifting column 204 moves downward along the inner wall of the hollow tube 203. During the descent... Due to the cooperation between the semi-circular groove 208 and the protrusion 209, the lifting column 204 will rotate accordingly. As the lifting column 204 descends and rotates, the locking block 205 presses down and rotates to contact the workpiece 4, thereby achieving stable fastening of the workpiece 4. When it is necessary to loosen the workpiece 4, the air pump 201 starts to send gas into the bottom of the hollow tube 203, causing the lifting column 204 to rise and rotate under the action of air pressure, driving the locking block 205 to lift and rotate, making it convenient to remove the workpiece 4.

[0024] Please refer to Figure 1 , Figure 2 and Figure 5 The clamping mechanism 3 includes a second positioning block 301, a ball 302, a support rod 303, a spring 304, and a bayonet 305. The second positioning block 301 is fixedly connected to the top of the housing 1 and has an internal channel. The support rod 303 is slidably connected to the inner wall of the second positioning block 301. One end of the support rod 303 is fixedly connected to the bayonet 305, and the bayonet 305 forms a space to accommodate the two ends of the workpiece 4. The other end of the support rod 303 away from the bayonet 305 is fixedly connected to the ball 302. The ball 302 serves as a handle for manual operation, making it convenient for the user to pull. The spring 304 is sleeved on the outer wall of the support rod 303, and the two ends of the spring 304 abut against the rear side of the second positioning block 301 and the rear side of the bayonet 305, respectively, so that the support rod 303 can compress the spring 304 when it is pulled, and is driven to reset by the elastic force of the spring 304 after release.

[0025] Please refer to Figure 2 and Figure 5 When it is necessary to place or remove the workpiece 4, the user pulls the ball 302. The ball 302 drives the support rod 303 to slide outward on the inner wall of the positioning block 301, and at the same time drives the bayonet 305 to move outward, so that the bayonet 305 opens and the spring 304 is compressed. When the workpiece 4 is placed in the bayonet 305, the user releases the ball 302. Under the action of the restoring force, the spring 304 pushes the support rod 303 to move inward, and then drives the bayonet 305 to move backward, thereby clamping the workpiece 4. When it is necessary to remove the workpiece 4, the user pulls the ball 302 again, so that the bayonet 305 moves outward, and the workpiece 4 can be easily removed. Then the spring 304 returns the ball 302 and the bayonet 305 to the clamping position, realizing convenient lateral clamping and release, and ensuring the speed and accuracy of clamping operation.

[0026] As a preferred embodiment, in order to ensure that the hollow tube 203 is accurately positioned and securely installed on the housing 1, the fastening mechanism 2 also includes multiple positioning blocks 206. The positioning blocks 206 are fixedly connected to the top of the housing 1. Through the positioning blocks 206, the multiple hollow tubes 203 are firmly fixedly connected to the top of the housing 1, thereby effectively preventing the hollow tubes 203 from shifting during use and ensuring the accuracy and stability of the movement of the lifting column 204.

[0027] As another preferred embodiment, in order to enhance the reliability and stability of the connection between the locking block 205 and the lifting column 204, the top of the locking block 205 is threadedly connected to the top of the lifting column 204 by a nut 207. This not only facilitates the disassembly and maintenance of the locking block 205, but also ensures that the locking block 205 will not loosen or fall off when a fastening force is applied to the workpiece 4, thereby improving the stability and safety of the fastening.

[0028] In another preferred embodiment, to make the operation of the clamping mechanism 3 more convenient and intuitive, one end of the support rod 303 is fixedly connected to a bayonet 305 for accommodating the workpiece 4, and the other end of the support rod 303 away from the bayonet 305 is fixedly connected to a ball 302. The ball 302 is designed in a shape that is easy to grip and serves as a handle for pulling the support rod 303. The user can easily control the opening and closing of the bayonet 305 by pulling the ball 302, thereby realizing the quick placement and removal of the workpiece 4.

[0029] In another preferred embodiment, in order to achieve automatic reset and stable clamping of the clamping mechanism 3, the clamping mechanism 3 further includes a spring 304. The spring 304 is sleeved on the outer wall of the support rod 303, and its two ends abut against the rear side of the positioning block 301 and the rear side of the bayonet 305, respectively. When the ball 302 is pulled, the spring 304 is compressed. When the ball 302 is released, the elastic force of the spring 304 drives the support rod 303 and the bayonet 305 to move inward, so that the bayonet 305 automatically clamps the workpiece 4.

[0030] As another preferred embodiment, in order to better adapt to workpieces 4 of different sizes and shapes and improve the uniformity and stability of fastening, the workpiece fastening fixture can be equipped with multiple fastening mechanisms 2. The clamping blocks 205 of the multiple fastening mechanisms 2 can act on the top of the workpiece 4 from different positions at the same time, dispersing the force so that the workpiece 4 is subjected to uniform force during the fastening process, avoiding deformation or damage caused by excessive local force, and further improving the fastening effect.

[0031] As another preferred embodiment, in order to optimize the overall layout and space utilization of the tooling, and to facilitate the connection of the air circuit, the air pump 201 is set on the outer wall of the housing 1, and the air pipe 202 is laid along the inner wall of the housing 1 and connected to the bottom of multiple hollow pipes 203, so that the air pump 201 is easy to maintain. At the same time, the air pipe 202 is hidden inside the housing 1, which not only protects the pipeline, but also makes the tooling look neater and the structure more compact.

[0032] Working principle: When it is necessary to fix the workpiece 4, the workpiece 4 is placed in the predetermined processing position. First, the workpiece 4 is laterally clamped and positioned by the clamping mechanism 3. Pull the ball 302 of the clamping mechanism 3. The ball 302 drives the support rod 303 fixed on the rear side to slide outward on the inner wall of the positioning block 2 301, so that the bayonet 305 opens. After the two ends of the workpiece 4 are put into the bayonet 305, the ball 302 is released. Under the elastic force of the spring 304 on the outer wall of the support rod 303, the spring 304 presses against the rear side of the positioning block 2 301 and the rear side of the bayonet 305, pushing the bayonet 305 to move backward, thereby clamping and fixing the two ends of the workpiece 4. After the lateral positioning of the workpiece 4 is completed, the fastening mechanism 2 is activated to vertically press and fasten the workpiece 4. The air pump 201 is started, and the air is extracted from the inner wall of the multiple hollow tubes 203 fixed to the inner wall of the box 1 through the air pipe 202, so that a negative pressure is formed inside the hollow tubes 203. The multiple hollow tubes 203 are fixed to the top of the box 1 by multiple positioning blocks 206 on the outer wall. Since the air inside the hollow tubes 203 is extracted, the multiple lifting columns 2 that are slidably connected to the inner wall of the multiple hollow tubes 203 are activated. 04. The column descends under the action of external atmospheric pressure. During the descent, the semi-circular groove 208 on the outer wall of the lifting column 204 cooperates with the protrusion 209 fixed on the inner wall of the hollow tube 203, so that the lifting column 204 rotates while descending on the inner wall of the hollow tube 203. The locking block 205 on the top of the lifting column 204, which is threadedly connected to the nut 207, contacts the workpiece 4 and applies pressure. At the same time, the rotation is accompanied, so that the workpiece 4 is stably fastened, and the workpiece is quickly and stably fixed. When it is necessary to remove the fixation of the workpiece 4, the air pump 201 is started, and the air is sent into the bottom of multiple hollow tubes 203 through the air pipe 202, so that multiple lifting columns 204 rise and rotate under the action of air pressure, driving the clamping block 205 to rotate and lift, so as to facilitate the removal of the workpiece 4. Then, by pulling the ball 302 of the clamping mechanism 3 to move the clamping slot 305, the workpiece 4 can be removed from the clamping mechanism 3. The spring 304 automatically resets the ball 302 and the clamping slot 305.

Claims

1. A workpiece fastening fixture, comprising: The box body (1) and the fastening mechanism (2) are provided on the box body (1). The fastening mechanism (2) includes: a hollow tube (203), a lifting column (204) and a locking block (205). The hollow tube (203) is fixedly connected to the top of the box body (1). The lifting column (204) is slidably connected to the inner wall of the hollow tube (203). The locking block (205) is connected to the end of the lifting column (204) away from the box body (1) and is used to abut against the workpiece (4). The fastening mechanism (2) is characterized in that it further includes an air pump (201) and an air pipe (202) connecting the air pump (201) and the bottom of the hollow tube (203). The inner wall of the hollow tube (203) is fixed with a protrusion (209), and the outer wall of the lifting column (204) is provided with a semi-circular arc groove (208) that slides with the protrusion (209) so that the lifting column (204) rotates when it rises and falls in the hollow tube (203).

2. The workpiece fastening fixture according to claim 1, characterized in that, The fastening mechanism (2) also includes multiple positioning blocks (206), and the hollow tube (203) is fixedly connected to the top of the box (1) through the multiple positioning blocks (206) for positioning the hollow tube (203).

3. The workpiece fastening fixture according to claim 1, characterized in that, The top of the locking block (205) is threadedly connected to the top of the lifting column (204) by a nut (207) to enhance the stability of the connection between the locking block (205) and the lifting column (204).

4. The workpiece fastening fixture according to claim 1, characterized in that, It also includes a clamping mechanism (3), which is used to clamp the workpiece (4) laterally. The clamping mechanism (3) includes a positioning block (301) and a support rod (303). The positioning block (301) is fixedly connected to the top of the box (1), and the support rod (303) is slidably connected to the inner wall of the positioning block (301).

5. A workpiece fastening fixture according to claim 4, characterized in that, One end of the support rod (303) is fixedly connected to a bayonet (305) for accommodating the workpiece (4), and the other end of the support rod (303) away from the bayonet (305) is fixedly connected to a ball (302) for pulling.

6. The workpiece fastening fixture according to claim 5, characterized in that, The clamping mechanism (3) also includes a spring (304), which is sleeved on the outer wall of the support rod (303), and the two ends of the spring (304) respectively abut against the rear side of the positioning block (301) and the rear side of the bayonet (305).

7. The workpiece fastening fixture according to claim 1, characterized in that, The fastening mechanism (2) has multiple fastening blocks (205) for acting together on the top of the workpiece (4) from different positions.

8. The workpiece fastening fixture according to claim 1, characterized in that, The air pump (201) is located on the outer wall of the housing (1), and the air pipe (202) is arranged along the inner wall of the housing (1) and connected to the bottom of the plurality of hollow pipes (203).

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