Hook claw type tool clamp

Abstract

The utility model relates to the technical field of tool clamps, and discloses a hook claw type tool clamp which comprises a chuck and a fixing disc. The clamping mechanism comprises four rotating blocks, a screw rod, a connecting ring, a first compressed spring, an outer ratchet wheel, an inner ratchet wheel, a connecting rod, a first spring, a second compressed spring, a first spring, a first pawl, a second pawl, a second spring, a second spring and an adjusting block, and the rear ends of the four rotating blocks are each rotationally provided with a hook claw body. The positions, close to the front ends, of the two opposite sides of the four hook claw bodies are slidably arranged in the chuck, a crank is rotationally arranged at the front end of the fixing disc, and a supporting disc is fixedly arranged at the rear end of the connecting rod. According to the utility model, the supporting disc is extruded by a workpiece to drive the connecting rod to move, so that the inner ratchet wheel drives the screw rod to rotate, and the hook claw main body automatically clamps workpieces with different sizes, so that the working efficiency is improved, and the operation process is simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to tool fixture technical field especially relates to a hook claw type tool fixture. BACKGROUND

[0002] Machine tool fixture, as the precision equipment specially designed for the specific workpiece in the specific machining process, has two functions of workpiece stable clamping and cutter accurate guiding, the hook claw type tool fixture, as a typical representative among machine tool fixtures, is usually carefully made of solid and durable metal material, has strong clamping force, can stably and reliably fix the workpiece to be processed, and ensures the smooth progress of the machining process, and the flexibility of the fixture makes it widely applied to various mechanical equipment such as lathe and milling machine, and provides strong support for various machining tasks.

[0003] The prior art (publication number: CN221560516U) discloses a hook claw type tool fixture, which relates to the technical field of tool fixtures and comprises a supporting plate, a clamping disc, a fixed cylinder, a clamping disc, a plurality of sliding grooves, a movable block, a hook claw, a clamping part, a movable rod, a sleeve, a transmission rod, a plurality of movable blocks, a hook claw and a workpiece body.

[0004] The inventor finds that the prior art has the following problems in the process of implementing the present application:

[0005] The device drives the rotating rod to rotate through the mounting rod, the rotating rod drives the gear to rotate, the two groups of racks drive the fixed plate and the movable plate to approach each other, the sleeve approaches the supporting plate, the sleeve drives the plurality of movable blocks to approach each other through the transmission rod, the movable blocks drive the hook claw and the clamping part to move, and the clamping of the workpiece is realized, but the device not only increases the burden of the operator, especially when the workpiece is frequently replaced, the efficiency is greatly reduced, and after each clamping is completed, the device needs to be manually reset before the next clamping, which is not only tedious but also reduces the production efficiency.

[0006] Therefore, the technical personnel in the art provide a hook claw type tool fixture to solve the problems in the background art. CONTENT OF THE UTILITY MODEL

[0007] The utility model discloses a hook claw type tooling fixture, through two clockwork in clamping mechanism, the workpiece of different size is clamped, convenient operation, save time and effort.

[0008] To realize above-mentioned purpose, the utility model provides the following technical scheme:

[0009] A hook claw type tooling fixture, including chuck and fixed disc, the inside of chuck is provided with clamping mechanism, the clamping mechanism includes four rotating blocks, screw rod, connecting ring, first compression spring, outer ratchet wheel, inner ratchet wheel, connecting rod, first clockwork, second compression spring, first spring, first pawl, second pawl, second spring, second clockwork and adjusting block,

[0010] Four rotating blocks rear end are rotatably provided with hook claw main body, and four hook claw main bodies are slidably arranged in the inside of chuck on the side close to the front end of each other, the front end of fixed disc is rotatably provided with rocking handle, and the rear end of connecting rod is fixedly provided with support disc.

[0011] Further, the rear end of the inner ratchet wheel is rotatably arranged in the inside of the chuck close to the rear end, the rear end of the screw rod is fixedly arranged in the front end of the inner ratchet wheel, the rear end of the first compression spring is fixedly arranged in the inside of the chuck close to the rear end, and the front end of the first compression spring is fixedly arranged in the rear end of the connecting rod.

[0012] Further, the first pawl is rotatably arranged in the inside of the connecting rod, the connecting rod is slidably arranged in the inside of the chuck and the screw rod, one side of the first spring is fixedly arranged on one side of the first pawl, and the other side of the first spring is fixedly arranged on one side of the inside of the connecting rod.

[0013] Further, one end of the second clockwork is fixedly arranged in the outside of the inner ratchet wheel, the other end of the second clockwork is fixedly arranged in the inside of the chuck, and the outside of the first pawl is engagedly connected in the inside of the inner ratchet wheel.

[0014] Further, the connecting ring is screw-connected in the outside of the screw rod, and the front end of each of the two sides of the four rotating blocks is rotatably arranged in the outside of the connecting ring.

[0015] Further, the front end of the screw rod is fixedly arranged in the rear end of the outer ratchet wheel, the rear end of the rocking handle is fixedly arranged in the front end of the outer ratchet wheel, and the outside of the outer ratchet wheel is rotatably arranged in the inside of the fixed disc.

[0016] Further, the outside of the adjusting block is slidably arranged in the inside of the fixed disc close to one side, the outside of the second pawl is rotatably arranged in the inside of the adjusting block close to the lower end, one side of the second spring is fixedly arranged on one side of the second pawl, and the other side of the second spring is fixedly arranged on one side of the inside of the adjusting block.

[0017] Further, the second compression spring is fixedly arranged on one side of the adjusting block, and the other side of the second compression spring is fixedly arranged on one side in the fixed disc, one end of the first clockwork is fixedly arranged outside the outer ratchet wheel, and the other end of the first clockwork is fixedly arranged in the fixed disc, and the second pawl is externally meshed with the outer ratchet wheel.

[0018] The utility model has the advantages of the following:

[0019] 1. The hook claw type tool clamp disclosed by the utility model can make the workpiece clamping complete, can adapt to workpieces of different shapes and sizes, and improves the versatility of the clamp.

[0020] 2. When the workpiece processed is needed to be disassembled, the adjusting block is moved to compress the second compression spring, the second pawl is driven to move to release the meshing with the outer ratchet wheel, the energy stored by the first clockwork is released, the outer ratchet wheel, the screw rod and the inner ratchet wheel are driven to rotate, the rotation of the screw rod makes the connecting ring move forward, and then the hook claw body gradually releases the workpiece, after the workpiece is taken out, the first compression spring is rebounded to drive the connecting rod to reset, the first pawl is re-meshed with the inner ratchet wheel, and the rotation of the inner ratchet wheel makes the second clockwork contract again to store energy for clamping the workpiece next time, the whole operation process is simple and fast, and the burden of the operator is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic view of the shaft of the utility model;

[0022] Figure 2 It is a rear view schematic view of the shaft of the utility model;

[0023] Figure 3 It is a side cross-sectional schematic view of the shaft of the utility model;

[0024] Figure 4 It is a side cross-sectional schematic view of the shaft of the utility model close to the fixed disc;

[0025] Figure 5 It is a local side cross-sectional schematic view of the shaft of the utility model close to the hook claw body;

[0026] Figure 6 It is a local side cross-sectional schematic view of the shaft of the utility model close to the inner ratchet wheel;

[0027] Figure 7This is a partial orthographic isometric view of the present invention near the outer ratchet.

[0028] Legend:

[0029] 1. Claw body; 2. Clamping plate; 3. Clamping mechanism; 4. Fixed plate; 5. Crank handle; 6. Support plate; 301. Rotating block; 302. Screw; 303. Connecting ring; 304. First compression spring; 305. Outer ratchet; 306. Inner ratchet; 307. Connecting rod; 308. First spring; 309. Second compression spring; 310. First spring; 311. First pawl; 312. Second pawl; 313. Second spring; 314. Second spring; 315. Adjusting block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figures 1-7 One embodiment provided by this utility model:

[0032] A hook-and-claw type tooling fixture includes a clamping plate 2 and a fixed plate 4. A clamping mechanism 3 is disposed inside the clamping plate 2. The clamping mechanism 3 includes four rotating blocks 301, a screw 302, a connecting ring 303, a first compression spring 304, an outer ratchet 305, an inner ratchet 306, a connecting rod 307, a first spring 308, a second compression spring 309, a first spring 310, a first pawl 311, a second pawl 312, a second spring 313, a second spring 314, and an adjusting block 315. The rear end of the inner ratchet 306 is rotatably disposed inside the clamping plate 2 near the rear end. The rear end of the screw 302 is fixedly disposed at the front end of the inner ratchet 306. The rear end of the first compression spring 304 is fixedly disposed inside the clamping plate 2 near the rear end, and the front end of the first compression spring 304 is fixed. The first pawl 311 is externally rotatably mounted inside the connecting rod 307 and externally slidably mounted inside the clamping plate 2 and screw 302. The first spring 310 is fixedly mounted on one side of the first pawl 311 and the other side of the first spring 310 is fixedly mounted inside the connecting rod 307. One end of the second spring 314 is fixedly mounted outside the inner ratchet 306 and the other end of the second spring 314 is fixedly mounted inside the clamping plate 2. The first pawl 311 is externally engaged with the inner ratchet 306. The connecting ring 303 is internally threaded to the outside of the screw 302. The four rotating blocks 301 are rotatably mounted outside the connecting ring 303 on opposite sides near the front end.

[0033] The front end of the screw rod 302 is fixedly arranged at the rear end of the outer ratchet wheel 305, the rear end of the crank 5 is fixedly arranged at the front end of the outer ratchet wheel 305, the outer ratchet wheel 305 is rotatably arranged inside the fixed disc 4, the adjusting block 315 is slidably arranged inside the fixed disc 4 on one side, the second pawl 312 is rotatably arranged inside the adjusting block 315 on the lower end, one side of the second spring 313 is fixedly arranged on one side of the second pawl 312, the other side of the second spring 313 is fixedly arranged on one side inside the adjusting block 315, one side of the second compression spring 309 is fixedly arranged on one side of the adjusting block 315, the other side of the second compression spring 309 is fixedly arranged on one side inside the fixed disc 4, one end inside the first clockwork 308 is fixedly arranged outside the outer ratchet wheel 305, the other end outside the first clockwork 308 is fixedly arranged inside the fixed disc 4, the second pawl 312 is externally meshed and connected outside the outer ratchet wheel 305, the rear end of the four rotating blocks 301 is rotatably provided with the claw main body 1, the two claw main bodies 1 are slidably arranged inside the chuck 2 on the side close to the front end, the front end of the fixed disc 4 is rotatably provided with the crank 5, and the rear end of the connecting rod 307 is fixedly provided with the support disc 6.

[0034] Specifically, in the actual operation process, first, the fixed disc 4 is stably installed on the processing equipment, then the second pawl 312 is disengaged from the engagement state with the outer ratchet wheel 305 by moving the adjusting block 315, preparing for subsequent operation, the outer ratchet wheel 305 is rotated by the handle 5, since the outer ratchet wheel 305, the screw rod 302 and the inner ratchet wheel 306 are fixedly connected, when the outer ratchet wheel 305 rotates, the screw rod 302 and the inner ratchet wheel 306 will rotate synchronously, with the rotation of the inner ratchet wheel 306, the connecting ring 303 will move backward along the thread outside the screw rod 302, and then the rotating block 301 connected with it rotates, so that the hook body 1 expands outward in the chuck 2, realizing the opening of the hook, at the same time, the rotation of the inner ratchet wheel 306 also drives the second clockwork 314 to gradually contract in the chuck 2, effectively storing energy for later use, when the hook body 1 slides to the predetermined position, the force on the adjusting block 315 is released, the adjusting block 315 is automatically returned to the original position under the action of the second compression spring 309, driving the second pawl 312 to reengage with the outer ratchet wheel 305, locking the current state, at this time, the workpiece to be processed is placed on the support disc 6, the gravity of the workpiece drives the connecting rod 307 to slide in the chuck 2 and compresses the first compression spring 304, so that it deforms, the movement of the connecting rod 307 gradually releases the engagement state of the first pawl 311 and the inner ratchet wheel 306, triggering the second clockwork 314 to release the stored energy, driving the inner ratchet wheel 306 to rotate reversely in the chuck 2, the rotation of the inner ratchet wheel 306 is transmitted to the outer ratchet wheel 305 through the screw rod 302, at the same time, driving the screw rod 302 itself to move towards the fixed disc 4, the movement of the screw rod 302 promotes the forward movement of the connecting ring 303, and then drives the rotating block 301 and the hook body 1 to move towards each other in the chuck 2, until the workpiece is firmly clamped, so that the stability and reliability of the clamping process are improved, avoiding the loosening of the workpiece during the processing process, in the process of rotating the screw rod 302, the outer ratchet wheel 305 also rotates synchronously in the fixed disc 4, since one end of the first clockwork 308 is fixed outside the outer ratchet wheel 305, the rotation of the outer ratchet wheel 305 will make the first clockwork 308 further contract, increasing the stored energy, improving the work efficiency;

[0035] For the workpiece that has completed processing, when disassembling, only need to move the adjusting block 315 again, release the engagement of the second pawl 312 and the outer ratchet wheel 305, at this time, the first spring 304 rebounds rapidly, drives the outer ratchet wheel 305 and the screw rod 302, the inner ratchet wheel 306 connected with it to rotate reversely, the rotation of the screw rod 302 makes the connecting ring 303 move to the chuck 2 direction, the rotating block 301 rotates, finally makes the claw main body 1 gradually release the clamping of the workpiece, at this time, the workpiece can be easily taken out, at the same time, the first compression spring 304 rebounds, pushes the connecting rod 307 to reset, the first pawl 311 reengages with the inner ratchet wheel 306, prepares for the next workpiece clamping operation, in addition, the rotation of the inner ratchet wheel 306 also promotes the further contraction of the second spring 314, reserves energy for future use, and the energy of the first spring 308 and the second spring 314 can be enhanced by rotating the handle 5, improves the clamping effect, and the clamp can adapt to different specifications and shapes of workpieces, improves the versatility of the clamp, the whole clamping process is simple and fast, reduces the labor intensity of workers, at the same time, the clamp can be flexibly adjusted to adapt to different processing requirements.

[0036] Working principle: in use, first install the fixed disc 4 on the machining equipment, move the adjusting block 315 to release the engagement relationship between the second pawl 312 and the outer ratchet wheel 305, then rotate the outer ratchet wheel 305, the screw rod 302 and the inner ratchet wheel 306 through the handle 5, make the connecting ring 303 move backward outside the screw rod 302 thread, the movement of the connecting ring 303 will drive the rotating block 301 to rotate, and then promote the claw main body 1 to move outward in the chuck 2, so that the claw main body 1 is opened, and the rotation of the inner ratchet wheel 306 will make the second spring 314 gradually contract in the chuck 2, store energy, when the claw main body 1 slides to the appropriate position, loosen the force on the adjusting block 315, make the second pawl 312 move, promote the second pawl 312 to engage with the outer ratchet wheel 305 again, then place the workpiece to be processed on the support disc 6, when the workpiece is placed on the support disc 6, it will push the connecting rod 307 to slide in the chuck 2, and pull the first compression spring 304 to deform, the movement of the connecting rod 307 will make the engagement connection between the first pawl 311 and the inner ratchet wheel 306 gradually release, promote the second spring 314 that stores energy to rebound, cause the inner ratchet wheel 306 to rotate in the chuck 2, the rotation of the inner ratchet wheel 306 will drive the screw rod 302 and the outer ratchet wheel 305 to rotate, the rotation of the screw rod 302 will make the connecting ring 303 outside it move to the fixed disc 4, and then drive the rotating block 301 to rotate, so that the claw main body 1 moves towards in the chuck 2, so as to complete the clamping operation of the workpiece;

[0037] Second, when the screw 302 rotates, will drive the outer gear 305 in the fixed disc 4 inside rotation, because the first spring 308 one end is fixed in its outside, when the outer gear 305 rotates, will make the first spring 308 gradually shrink, store energy, when the workpiece is disassembled, only need to move the adjusting block 315 makes it slide in the fixed disc 4 inside, and extrude the second compression spring 309, make it shrink, the movement of the adjusting block 315 will remove the second ratchet 312 and the engagement relationship of the outer gear 305, make the first spring 308 stored energy rebound, cause the outer gear 305 in the fixed disc 4 inside rotation, the rotation of the outer gear 305 will drive the screw 302 and the inner gear 306 rotation, the rotation of the screw 302 will make its outside connecting ring 303 to the chuck 2 and cause the rotating block 301 rotation, in turn make the hook main body 1 gradually release the clamping of the workpiece, at this time the workpiece is taken out, make the first compression spring 304 rebound drive connecting rod 307 reset, in turn make the first ratchet 311 inside the connecting rod 307 and the inner gear 306 meshing again, and the rotation of the inner gear 306 will make the second spring 314 connected with it gradually shrink, make it gradually store energy for the next workpiece clamping ready.

[0038] Finally, it should be noted that: the above only for the preferred embodiments of the present application have, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for the person skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of the present application.

Claims

1. A hook tooling clamp comprising a chuck (2) and a fixed plate (4), characterized in that: The chuck (2) is internally provided with a clamping mechanism (3), the clamping mechanism (3) comprises four rotating blocks (301), screw rods (302), connecting rings (303), first compression springs (304), outer ratchets (305), inner ratchets (306), connecting rods (307), first springs (308), second compression springs (309), first springs (310), first pawls (311), second pawls (312), second springs (313), second springs (314) and adjusting blocks (315). Four rear ends of the rotating blocks (301) are rotatably provided with hook bodies (1), two opposite sides of the four hook bodies (1) are slidably arranged in the chuck (2) from the front end, the front end of the fixed disc (4) is rotatably provided with a crank (5), and the rear end of the connecting rod (307) is fixedly provided with a supporting disc (6).

2. A hook style tooling clamp as defined in claim 1 wherein: The rear end of the inner ratchet (306) is rotatably arranged in the chuck (2) at the rear end, the rear end of the screw rod (302) is fixedly arranged at the front end of the inner ratchet (306), the rear end of the first compression spring (304) is fixedly arranged in the chuck (2) at the rear end, and the front end of the first compression spring (304) is fixedly arranged at the rear end of the connecting rod (307).

3. A hook style fixture as set forth in claim 1, wherein: The first pawl (311) is rotatably arranged in the connecting rod (307), the connecting rod (307) is slidably arranged in the chuck (2) and the screw rod (302), one side of the first spring (310) is fixedly arranged on one side of the first pawl (311), and the other side of the first spring (310) is fixedly arranged on one side of the connecting rod (307).

4. The hook style fixture of claim 1 wherein: One end of the second spring (314) is fixedly arranged outside the inner ratchet (306), the other end of the second spring (314) is fixedly arranged inside the chuck (2), and the first pawl (311) is engaged with the inner ratchet (306).

5. A hook style fixture as set forth in claim 1, wherein: The connecting ring (303) is threadedly connected to the outside of the screw rod (302), and the four rotating blocks (301) are rotatably arranged on the outside of the connecting ring (303) at the front end.

6. A hook style tooling clamp as defined in claim 1 wherein: The rear end of the screw rod (302) is fixedly arranged at the front end of the outer ratchet (305), the rear end of the crank (5) is fixedly arranged at the front end of the outer ratchet (305), and the outer ratchet (305) is rotatably arranged in the fixed disc (4).

7. A hook style fixture as set forth in claim 1, wherein: The adjusting block (315) is slidably arranged in the fixed disc (4) at one side, the second pawl (312) is rotatably arranged in the adjusting block (315) at the lower end, one side of the second spring (313) is fixedly arranged on one side of the second pawl (312), and the other side of the second spring (313) is fixedly arranged on one side of the adjusting block (315).

8. The hook style fixture of claim 1 wherein: The second compression spring (309) is fixedly arranged on one side of the adjusting block (315), and the other side of the second compression spring (309) is fixedly arranged inside the fixed disc (4). One end of the first clockwork spring (308) is fixedly arranged outside the outer ratchet wheel (305), and the other end of the first clockwork spring (308) is fixedly arranged inside the fixed disc (4). The second pawl (312) is engagedly connected outside the outer ratchet wheel (305).

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