Tool clamp

Abstract

The utility model discloses a work fixture, which belongs to the field of fixtures and comprises a base, an air cylinder, a connecting piece, a first rack, a gear, a second rack, a first claw and a second claw, the air cylinder is arranged at the right end of the base, the first claw and the second claw are both slidably connected to a first sliding groove, the first rack is fixed to the first claw, and the second rack is fixed to the second claw. The second rack is slidably connected to the second sliding groove, the gear is rotatably connected to the interior of the base, the lower portion of the second claw extends into the base and is fixedly provided with a connecting piece, the left end of the connecting piece is fixedly connected with the second rack, the right end of the connecting piece is provided with a movable space, and the push-pull end of the air cylinder extends into the movable space and is provided with a movable block; gaps are formed between the movable block and the movable space and between the push-pull ends of the air cylinder and the movable space. The push-pull end of the air cylinder is in non-rigid connection with the connecting piece, the problem that the air cylinder cannot push the first claw and the second claw to move due to the fact that the connecting piece and the air cylinder are not coaxial is solved, and installation is convenient.

Description

Technical Field

[0001] The utility model belongs to the field of clamps, and in particular relates to a tooling clamp. Background Art

[0002] Over the years, with the development of CNC machine tool technology, fixture technology has also continued to evolve. As an indispensable component in machining, fixtures are developing towards high-tech. Common fixture types include adjustable fixtures, combination fixtures, and CNC machine tool fixtures. Among them, the vise is one of the most common and economical fixtures. It has the advantages of simple structure, rapid clamping, and accurate positioning. It can save time in machining, improve efficiency and machining accuracy, and thus enhance product quality. However, the vise also has some limitations. For example, it is not effective when clamping workpieces with complex shapes. This is mainly because the vise's jaws are flat, making it unsuitable for clamping cylindrical workpieces. During machining, the workpiece is easily displaced and sometimes even falls off the machine table.

[0003] Existing tooling fixtures, especially those driven by cylinders, have assembled cylinders and clamping jaw structures, while traditional cylinder push-pull rods and clamping jaw structures are fixed and rigidly connected. This connection method not only requires high assembly technology, but also high structural precision. If the installation is not done properly, there will be misalignment problems, which will cause the cylinder to be unable to push the clamping jaw to move. Utility Model Content

[0004] The purpose of the present invention is to provide a fixture to overcome at least one of the above-mentioned defects in the prior art.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] The utility model provides a tool fixture, including a base, a cylinder, a connecting piece, a first rack, a gear, a second rack, a first claw, and a second claw. The right end of the base is provided with a cylinder, the top of the base is provided with a first slide groove, the first claw and the second claw are both slidably connected to the first slide groove, the first claw is located on the left side of the second claw, the first rack is fixed to the first claw, the inner bottom wall of the base is provided with a second slide groove, the second rack is slidably connected to the second slide groove, the gear is rotatably connected to the interior of the base, and is respectively meshed with the first rack and the second rack, the lower part of the second claw extends to the interior of the base and is fixed with a connecting piece, the left end of the connecting piece is fixedly connected to the second rack, and the right end of the connecting piece is provided with a movable space, the push-pull end of the cylinder extends to the movable space and is provided with a movable block, and there is a gap between the movable block and the push-pull end of the cylinder and the movable space.

[0007] Preferably, the connecting member includes a fixed part and a movable part, the fixed part is fixed to the lower part of the second claw, and the left end passes through the second claw and is fixedly connected to the second rack, the right end of the fixed part passes through the second claw and is fixed with the movable part, and the movable space is opened in the movable part.

[0008] Preferably, the movable space includes a movable cavity and a threaded hole. The movable cavity is opened inside the movable part. The right side wall of the movable part is provided with a threaded hole, which is connected to the movable cavity. The movable block is located in the movable cavity.

[0009] Preferably, the cylinder includes a cylinder body, a front cover, a rear cover, a piston, a connecting rod, and a push-pull rod. The front cover is provided at the right end of the base, the cylinder body is provided at the right end of the front cover, the rear cover is provided at the right end of the cylinder body, the piston is slidably connected in the cylinder body, the connecting rod is fixed to the piston, and the left end of the connecting rod passes through the front cover to be fixed with a push-pull rod, the left end of the push-pull rod passes through the threaded hole and extends to the movable cavity to be fixed with a movable block, there is a gap between the movable block and the movable cavity, and there is a gap between the push-pull rod and the threaded hole.

[0010] Preferably, the movable block has an external thread, and the external thread is threadably matched with the threaded hole.

[0011] Preferably, the front cover is detachably fixed to the right end of the base by screws.

[0012] Preferably, the first claw and the second claw each include a sliding portion and a clamping portion, the clamping portion is fixed to the top of the sliding portion, and the sliding portion is slidably connected to the first sliding groove.

[0013] Preferably, a dustproof plate is provided on the top of the first chute, and the dustproof plate is located between the left and right clamping parts.

[0014] Preferably, a clamping groove is formed on the inner side wall of the clamping portion.

[0015] Preferably, an extending portion is fixed to the bottom of the sliding portion of the second claw, and the fixing portion is fixed to the lower portion of the extending portion.

[0016] The beneficial effects of the utility model are:

[0017] 1. The push-pull end of the cylinder and the connecting piece are connected in a non-rigid manner. The movable block cooperates with the movable space of the connecting piece to make the push-pull end of the cylinder and the connecting piece movable. It can be adjusted adaptively and will not cause the cylinder to be unable to push the first claw and the second claw to move due to the misalignment of the connecting piece and the cylinder. It does not require high structural accuracy, nor does it require high installation technology, and is easy to install.

[0018] 2. Only by extending and retracting the cylinder can the first claw and the second claw move toward the center or away from each other at the same time, which is easy to operate.

[0019] 3. The front cover is detachably fixed to the right end of the base by screws, making installation easy.

[0020] 4. The setting of dustproof plate can prevent dust and extend the service life.

[0021] 5. By setting the clamping groove, the disadvantage of traditional flat clamping is changed, and it can adapt to the clamping of workpieces with different shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the top structure of the utility model.

[0023] Figure 2 It is a schematic cross-sectional structural diagram of the present utility model.

[0024] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of A in the figure.

[0025] Figure 4 It is a schematic cross-sectional view of the cylinder of the utility model.

[0026] Figure 5 It is a schematic cross-sectional structural diagram of the second claw of the utility model.

[0027] Figure 6 It is a schematic cross-sectional structural diagram of the first claw of the utility model.

[0028] The marks in the accompanying drawings are: 1-base, 2-cylinder, 3-connecting part, 4-first rack, 5-gear, 6-second rack, 7-first claw, 8-second claw, 9-first slide groove, 10-second slide groove, 321-active space, 11-gap, 31-fixing part, 32-active part, 3211-active chamber, 3212-threaded hole, 21-cylinder body, 22-front cover, 23-rear cover, 24-piston, 25-connecting rod, 26-push-pull rod, 27-active block, 271-external thread, 12-screw, 781-sliding part, 782-clamping part, 13-dustproof plate, 783-clamping groove, 784-extension part. DETAILED DESCRIPTION

[0029] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0030] Any content not described in detail in this specification belongs to the prior art known to those skilled in the art. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely for the purpose of facilitating the description of the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1 to 6 As shown, a fixture provided in this embodiment includes a base 1, a cylinder 2, a connecting member 3, a first rack 4, a gear 5, a second rack 6, a first claw 7, and a second claw 8. The right end of the base 1 is provided with a cylinder 2, the top of the base 1 has a first slide 9, the first claw 7 and the second claw 8 are both slidably connected to the first slide 9, the first claw 7 is located on the left side of the second claw 8, the first rack 4 is fixed to the first claw 7, the inner bottom wall of the base 1 has a second slide 10, the second rack 6 is slidably connected to Gear 5 is rotatably connected to the interior of base 1 in second chute 10 and meshes with first rack 4 and second rack 6, respectively. The lower portion of second jaw 8 extends into base 1 and is secured to connector 3. The left end of connector 3 is fixedly connected to second rack 6, and a movable space 321 is defined at the right end of connector 3. The push-pull end of cylinder 2 extends into movable space 321, where a movable block 27 is located. A gap 11 is defined between movable block 27 and the push-pull end of cylinder 2 and movable space 321. During clamping, cylinder 2 extends, driving second jaw 8 leftward and second rack 6 leftward, causing gear 5 to rotate clockwise, driving first rack 4 rightward, and thus first jaw 7 rightward. To remove the clamped object, cylinder 2 retracts, driving second jaw 8 rightward and second rack 6 rightward, causing gear 5 to rotate counterclockwise, driving first rack 4 leftward, and thus first jaw 7 leftward. In this way, the first claw 7 and the second claw 8 can be simultaneously moved toward or away from each other by simply extending or retracting the cylinder 2, making operation simple. Furthermore, the push-pull end of the cylinder 2 and the connector 3 are connected in a non-rigid manner. The movable block 27 cooperates with the movable space 321 of the connector 3, creating a flexible connection between the push-pull end of the cylinder 2 and the connector 3, allowing for adaptive adjustment. This eliminates the problem of the cylinder 2 being unable to move the first claw 7 and the second claw 8 due to misalignment between the connector 3 and the cylinder 2. This design not only reduces the requirements for structural precision but also for installation technology, making installation easy.

[0032] The connector 3 comprises a fixed portion 31 and a movable portion 32. The fixed portion 31 is fixed to the lower portion of the second jaw 8, with its left end extending through the second jaw 8 and fixedly connected to the second rack 6. The right end of the fixed portion 31 extends through the second jaw 8 and is secured to the movable portion 32. A movable space 321 is defined within the movable portion 32. The fixed portion 31 connects the second jaw 8 and the second rack 6 as a whole, allowing them to move synchronously. The movable space 321 of the movable portion 32 cooperates with the movable block 27 and the push-pull end of the cylinder 2 to achieve a movable connection between the cylinder 2 and the connector 3, ensuring push-pull operation of the connector 3.

[0033] The movable space 321 includes a movable cavity 3211 and a threaded hole 3212. The movable cavity 3211 is provided inside the movable portion 32. The threaded hole 3212 is provided on the right side wall of the movable portion 32. The threaded hole 3212 communicates with the movable cavity 3211. The movable block 27 is located within the movable cavity 3211. The movable block 27 has an external thread 271 that is threadedly engaged with the threaded hole 3212. Among them, the cylinder 2 includes a cylinder body 21, a front cover 22, a rear cover 23, a piston 24, a connecting rod 25, and a push-pull rod 26. The right end of the base 1 is provided with a front cover 22, the right end of the front cover 22 is provided with a cylinder body 21, the right end of the cylinder body 21 is provided with a rear cover 23, the piston 24 is slidably connected in the cylinder body 21, the connecting rod 25 is fixed to the piston 24, and the left end of the connecting rod 25 passes through the front cover 22 to be fixed with a push-pull rod 26, the left end of the push-pull rod 26 passes through the threaded hole 3212, and extends to the active cavity 3211 to be fixed with a movable block 27, there is a gap 11 between the movable block 27 and the active cavity 3211, and there is a gap 11 between the push-pull rod 26 and the threaded hole 3212. The gap 11 between the movable block 27 and the movable cavity 3211 allows the movable block 27 to move left and right within the movable cavity 3211, with a full 360-degree adjustment range. The gap 11 between the push-pull rod 26 and the threaded hole 3212 allows the push-pull rod 26 and the threaded hole 3212 to move 360 degrees around. During installation, align the external thread 271 of the movable block 27 with the threaded hole 3212 and screw through the threaded hole 3212. At this point, the movable block 27 is located within the movable cavity 3211. Due to the arrangement of the external thread 271 and the threaded hole 3212, once the movable block 27 is installed in the movable cavity 3211, the movable block 27 cannot escape from the movable cavity 3211 during left and right movement.

[0034] The front cover 22 is detachably fixed to the right end of the base 1 by screws 12, and is easy to install.

[0035] Both the first claw 7 and the second claw 8 include a sliding portion 781 and a clamping portion 782. The clamping portion 782 is fixed to the top of the sliding portion 781, and the sliding portion 781 is slidably connected to the first chute 9. A dust shield 13 is provided at the top of the first chute 9, located between the left and right clamping portions 782. An extension 784 is fixed to the bottom of the sliding portion 781 of the second claw 8, and the fixing portion 31 is fixed to the bottom of the extension 784. The dust shield 13 prevents dust and prolongs the service life.

[0036] The inner sidewall of the clamping portion 782 is provided with a clamping groove 783. This configuration overcomes the drawbacks of conventional planar clamping, enabling the clamping of workpieces of varying shapes. In this embodiment, the clamping groove 783 has a rectangular cross-section, suitable for clamping cylindrical workpieces. In other embodiments, the clamping groove 783 may also have other shapes.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fixture, characterized in that: It includes a base, a cylinder, a connecting piece, a first rack, a gear, a second rack, a first claw, and a second claw; A cylinder is provided at the right end of the base; The top of the base is provided with a first sliding groove, the first claw and the second claw are both slidably connected to the first sliding groove, and the first claw is located on the left side of the second claw; The first rack is fixed to the first claw; The inner bottom wall of the base has a second sliding groove, and the second rack is slidably connected to the second sliding groove; The gear is rotatably connected to the interior of the base and is meshed with the first rack and the second rack respectively; The lower portion of the second claw extends into the interior of the base and is fixed with a connecting piece, the left end of the connecting piece is fixedly connected to the second rack, and the right end of the connecting piece is provided with a movable space; The push-pull end of the cylinder extends into the activity space and a movable block is provided therein. A gap is provided between the movable block and the push-pull end of the cylinder and the activity space.

2. The fixture according to claim 1, characterized in that: The connecting member includes a fixed portion and a movable portion; The fixing portion is fixed to the lower part of the second claw, and the left end passes through the second claw and is fixedly connected to the second rack; The right end of the fixed portion passes through the second claw to fix the movable portion; The activity space is opened in the activity part.

3. The fixture according to claim 2, characterized in that: The activity space includes an activity cavity and a threaded hole; The movable cavity is formed inside the movable part, and a threaded hole is formed on the right side wall of the movable part, and the threaded hole is connected to the movable cavity; The movable block is located in the movable cavity.

4. The fixture according to claim 3, characterized in that: The cylinder includes a cylinder body, a front cover, a rear cover, a piston, a connecting rod, and a push-pull rod; A front cover is provided at the right end of the base, a cylinder body is provided at the right end of the front cover, and a rear cover is provided at the right end of the cylinder body; A piston is slidably connected within the cylinder; The connecting rod is fixed to the piston, and the left end of the connecting rod passes through the front cover and is fixed with a push-pull rod; The left end of the push-pull rod passes through the threaded hole and extends into the movable cavity where the movable block is fixed; There is a gap between the movable block and the movable cavity, and there is a gap between the push-pull rod and the threaded hole.

5. The fixture according to claim 4, characterized in that: The movable block has an external thread, and the external thread is threadably matched with the threaded hole.

6. The fixture according to claim 4, characterized in that: The front cover is detachably fixed to the right end of the base by screws.

7. The fixture according to claim 2, characterized in that: The first claw and the second claw each include a sliding portion and a clamping portion; The clamping portion is fixed to the top of the sliding portion; The sliding portion is slidably connected to the first sliding groove.

8. The fixture according to claim 7, characterized in that: A dustproof plate is provided on the top of the first sliding groove, and the dustproof plate is located between the left and right clamping parts.

9. The fixture according to claim 7, characterized in that: The inner side wall of the clamping portion is provided with a clamping groove.

10. The fixture according to claim 7, characterized in that: An extension portion is fixed to the bottom of the sliding portion of the second claw; The fixing portion is fixed to the lower portion of the extending portion.

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