Eccentric clamp

Abstract

An eccentric clamp comprises a fixing base and a clamping base used for clamping a workpiece, a dovetail groove is formed in the fixing base, a dovetail block arranged in the dovetail groove in a sliding mode is fixedly arranged at the bottom of the clamping base, a channel communicated with the dovetail groove is formed in the fixing base, and the channel extends in the length direction of the dovetail groove. The channel penetrates through the peripheral side wall of the fixing base, a moving plate and a lead screw used for driving the moving plate to move are arranged in the channel, and the moving plate is connected with a plurality of ejecting blocks used for ejecting the dovetail blocks to the inner walls of the dovetail grooves. When the eccentric distance needs to be adjusted, the lead screw is rotated to enable all the ejector blocks not to abut against the dovetail block any more, after adjustment is completed, the lead screw is rotated to enable all the ejector blocks to abut against the dovetail block, and after long-term use, the adjusting precision of the eccentric distance cannot be affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing eccentric clamp technical field, specifically a kind of eccentric clamp. BACKGROUND

[0002] Lathe is more complex in the process of processing eccentric product, there is difficulty in accurately adjusting eccentric distance in processing. Because the eccentric distance of different eccentric shafts is different, the eccentric distance of eccentric clamp needs to be adjusted frequently in the processing process, the traditional three-jaw chuck cooperates with the mode of pad, the adjustment of eccentric distance is more troublesome, inconvenient to operate, and the working efficiency is low.

[0003] Chinese patent document "CN221210748U" discloses a kind of adjustable eccentric distance high-precision eccentric clamp, the fixed seat of the scheme is provided with dovetail groove, clamping seat bottom is provided with sliding block, sliding block is matched with dovetail groove shape and is slidably arranged in dovetail groove, fixed seat is provided with several clamping bolts, clamping bolt is used to make dovetail groove side wall clamping sliding block, while base is located at the both ends of dovetail groove and is provided with stopper, two stoppers are used to position clamping seat, eccentric distance can be adjusted by moving sliding block, cooperate with the position of workpiece fixed by clamping bolt and stopper and keep eccentric distance unchanged. However, the first deformation part of the fixed seat of the scheme will be fatigued after long time application, resulting in poor deformation effect, and it becomes more difficult to rebound, so that the adjustment accuracy is not enough when eccentric distance needs to be adjusted. UTILITY MODEL CONTENTS

[0004] In order to solve the problem of poor adjustment accuracy when adjusting eccentric distance of eccentric clamp in prior art after long-term use, the utility model provides an eccentric clamp, which improves the adjustment accuracy of eccentric clamp after long-term use.

[0005] The utility model discloses a kind of eccentric clamps, including fixed seat and the clamping seat for clamping workpiece, fixed seat is provided with dovetail groove, the bottom of clamping seat is fixedly provided with the dovetail block of slidingly arranged in dovetail groove, the fixed seat is provided with the passage being communicated with dovetail groove, and passage extends along the length direction of dovetail groove, passage penetrates the circumferential side wall of fixed seat, moving plate and screw rod for driving moving plate to move are arranged in passage, moving plate is connected with multiple top blocks for tightly jacking dovetail block on the inner wall of dovetail groove.

[0006] As a further optimization of the utility model a kind of eccentric clamp: the passage is fixedly provided with mounting strip, screw rod is coaxially fixedly connected with extension shaft, extension shaft passes through mounting strip and is rotatably connected with mounting strip by bearing.

[0007] As a further optimization of the utility model a kind of eccentric clamp: the part of extension shaft that extends out of the bearing is fixedly provided with handle.

[0008] As a further optimization of the utility model type eccentric clamp: the top block is connected with the mounting strip through a reset spring.

[0009] As a further optimization of the utility model type eccentric clamp: a plurality of positioning rods are fixedly arranged on the mounting strip, and the reset spring is sleeved on the positioning rod in one-to-one correspondence.

[0010] As a further optimization of the utility model type eccentric clamp: a slope capable of contacting the side wall of the dovetail block is arranged on the top block.

[0011] As a further optimization of the utility model type eccentric clamp: two baffles extending to the side of the channel are fixedly arranged on the fixed seat, and the two baffles are connected with the fixed seat through bolts.

[0012] As a further optimization of the utility model type eccentric clamp: the adjacent top blocks are connected through a connecting rod.

[0013] As a further optimization of the utility model type eccentric clamp: at least one connecting shaft is arranged on the end face of the moving plate, and the connecting shaft is fixedly connected with one of the connecting rods.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The utility model discloses a channel communicated with the dovetail groove is arranged on the fixed seat, and the channel extends along the length direction of the dovetail groove, the channel penetrates the circumferential side wall of the fixed seat, the moving plate and the lead screw for driving the moving plate to move are arranged in the channel, the moving plate is connected with a plurality of top blocks for tightly pressing the dovetail block on the inner wall of the dovetail groove, when the eccentric distance needs to be adjusted, the lead screw is rotated so that all the top blocks do not tightly press the dovetail block, after adjustment, the lead screw is rotated so that all the top blocks tightly press the dovetail block, and after long-term use, the adjustment accuracy of the eccentric distance is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the sectional view of the utility model;

[0017] Figure 2 It is the enlarged view of the utility model;

[0018] Figure 3 It is the schematic view of the top block not tightly pressing the dovetail block;

[0019] Figure 4 It is the schematic view of the top block tightly pressing the dovetail block;

[0020] Figure 5 It is the plan view of the utility model;

[0021] Marked in the figure: 1, fixed seat, 101, channel, 102, dovetail groove, 2, dovetail block, 201, connecting block, 3, clamping seat, 4, clamping space, 5, top block, 501, connecting rod, 502, reset spring, 503, positioning rod, 6, lead screw, 601, mounting strip, 602, bearing, 603, handle, 604, moving plate, 605, connecting shaft, 606, limit block, 7, baffle. DETAILED DESCRIPTION

[0022] The technical scheme of the utility model will be further described in detail in combination with specific embodiments. The parts not described and disclosed in the following embodiments of the utility model should be understood as the prior art known or should be known by the person skilled in the art, such as how to fix the workpiece in the clamping space of the clamping seat, how to fix the fixed seat with the machining equipment, etc.

[0023] Embodiment 1

[0024] An eccentric clamp, such as Figures 1-5As shown, including fixed seat 1 and for clamping workpiece clamping seat 3, fixed seat 1 with for driving eccentric clamp action with other equipment connected, other equipment for eccentric clamp of the conventional way, here no longer make too much ado. Workpiece is fixed in the clamping space 4 of clamping seat 3, fixed seat 1 is provided with dovetail groove 102, the bottom of clamping seat 3 is fixedly provided with dovetail block 2 slidingly arranged in dovetail groove 102, dovetail block 2 is fixedly provided with connecting block 201, connecting block 201, dovetail block 2 and clamping seat 3 are integrally formed, fixed seat 1 is provided with channel 101 in communication with dovetail groove 102, and the channel 101 extends along the length direction of the dovetail groove 102, the channel 101 penetrates the peripheral sidewall of the fixed seat 1, the channel 101 is provided with a moving plate 604 and a lead screw 6 for driving the moving plate 604 to move, the lead screw 6 is provided with a limit block 606, to avoid the moving plate 604 from the lead screw 6 fall off. Moving plate 604 is connected with a plurality of top block 5 for tightly pressing dovetail block 2 on the inner wall of dovetail groove 102, the top block 5 is provided with a slope capable of contacting the sidewall of the dovetail block 2. When the eccentricity needs to be adjusted, the dovetail block 2 is moved, after the adjustment is completed, the lead screw 6 is rotated to move the moving plate 604 along the lead screw 6, until all the top block 5 tightly presses the dovetail block 2 in the dovetail groove 102, then the workpiece can be machined; when the eccentricity needs to be adjusted again, the lead screw 6 is reversely rotated, so that the top block 5 is no longer tightly pressed against the dovetail block 2, at this time the position of the dovetail block 2 can be adjusted, after long-term use, the adjustment accuracy of the eccentricity is not affected, and the fixing effect of the dovetail block 2 can be ensured. In order to ensure that all the top block 5 moves together, therefore, the adjacent top block 5 is connected by connecting rod 501. The lead screw 6 is provided with a matching ball nut, the cooperation between the lead screw 6 and the ball nut is the conventional prior art in the art, which will not be described here. The mounting hole for fixing the ball nut is provided on the moving plate 604. When the ball nut moves on the lead screw 6, the moving plate 604 moves together, realizing the movement of all the top block 5.

[0025] The above is the basic embodiment of the present application, which can be further improved, optimized and limited based on the above, so as to obtain the following embodiments:

[0026] Embodiment 2

[0027] The embodiment is an improved scheme made on the basis of embodiment 1, and the main body structure is same with embodiment 1, and the improvement lies in that the mounting strip 601 is fixedly arranged in the channel 101, the mounting strip 601 is completely located in the channel 101, the extension shaft is coaxially fixedly connected with the lead screw 6, the extension shaft passes through the mounting strip 601 and is rotationally connected with the mounting strip 601 through the bearing 602. The operator rotates the extension shaft, the extension shaft drives the lead screw 6 to rotate, and then the ball nut on the lead screw 6 moves with the moving plate 604; the extension shaft rotates forward, the ball nut and the moving plate 604 move forward together, that is, the top block 5 is tightly pressed on the dovetail block 2; the extension shaft reverses, the ball nut and the moving plate 604 move backward together, that is, the top block 5 is no longer tightly pressed on the dovetail block 2, and at this time, the dovetail block 2 can be adjusted. How the extension shaft is fixedly connected with the bearing 602 is a conventional prior art in the field, and excessive details are not described here.

[0028] Embodiment 3

[0029] The embodiment is an improved scheme made on the basis of embodiment 2, and the main body structure is same with embodiment 2, and the improvement lies in that, in order to facilitate the operator to rotate the extension shaft, the part of the extension shaft extending out of the bearing 602 is fixedly provided with the handle 603.

[0030] Embodiment 4

[0031] The embodiment is an improved scheme made on the basis of embodiment 2, and the main body structure is same with embodiment 2, and the improvement lies in that, in order to ensure that the top block 5 can be quickly reset when the position of the dovetail block 2 in the dovetail groove 102 needs to be adjusted, the reset spring 502 is connected between the top block 5 and the mounting strip 601. In order to ensure that the reset spring 502 is not twisted when compressed and recovered, a plurality of positioning rods 503 are fixedly arranged on the mounting strip 601, the reset spring 502 is correspondingly sleeved on the positioning rod 503, and there is a distance between the positioning rod 503 and the top block 5.

[0032] Embodiment 5

[0033] The embodiment is an improved scheme made on the basis of embodiment 1, and the main body structure is same with embodiment 1, and the improvement lies in that the two baffles 7 extending to the side of the channel 101 are fixedly arranged on the fixed seat 1, and the two baffles 7 are connected with the fixed seat 1 through bolts. The baffle 7 can be in contact with the surface of the mounting strip 601 to block the mounting strip 601 from being taken out of the channel 101; when the mounting strip 601 needs to be taken out of the channel 101 to replace some parts, the mounting strip 601 can be taken out by taking down the baffle 7 after taking down the bolts.

[0034] Embodiment 6

[0035] The embodiment is an improved scheme based on the embodiment 1, the main structure is same with the embodiment 1, and the improvement lies in that: in order to facilitate the movement of the moving plate 604, the top block 5 moves together, and the connecting shaft 605 is arranged on the end surface of the moving plate 604, the connecting shaft 605 is fixedly connected with one connecting rod 501.

[0036] The above description of disclosed embodiments enables those skilled in the art to make or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An eccentric clamp comprising a fixed seat (1) and a clamping seat (3) for clamping a workpiece, a dovetail groove (102) being formed in the fixed seat (1), and a dovetail block (2) being fixedly arranged at the bottom of the clamping seat (3) and slidingly arranged in the dovetail groove (102), characterized in that: The fixed seat (1) is provided with a channel (101) communicated with the dovetail groove (102), the channel (101) extends along the length direction of the dovetail groove (102), the channel (101) penetrates the peripheral side wall of the fixed seat (1), the channel (101) is provided with a moving plate (604) and a lead screw (6) for driving the moving plate (604) to move, the moving plate (604) is connected with a plurality of jacks (5) for tightly jacking the dovetail block (2) on the inner wall of the dovetail groove (102).

2. The eccentric clamp of claim 1, wherein: The channel (101) is fixedly provided with a mounting strip (601), the lead screw (6) is coaxially fixedly connected with an extension shaft, the extension shaft passes through the mounting strip (601) and is rotatably connected with the mounting strip (601) through a bearing (602).

3. The eccentric clamp of claim 2, wherein: The part of the extension shaft extending out of the bearing (602) is fixedly provided with a handle (603).

4. The eccentric clamp of claim 2, wherein: The jack (5) is connected with the mounting strip (601) through a reset spring (502).

5. The eccentric clamp of claim 4, wherein: A plurality of positioning rods (503) are fixedly arranged on the mounting strip (601), the reset spring (502) is sleeved on the positioning rod (503) one by one, and the positioning rod (503) is spaced apart from the jack (5).

6. The eccentric clamp of claim 1, wherein: The jack (5) is provided with an inclined surface capable of contacting the side wall of the dovetail block (2).

7. The eccentric clamp of claim 1, wherein: Two baffles (7) extending to the side of the channel (101) are fixedly arranged on the fixed seat (1), and the two baffles (7) are connected with the fixed seat (1) through bolts.

8. The eccentric clamp of claim 1, wherein: The adjacent jacks (5) are connected through connecting rods (501).

9. The eccentric clamp of claim 8, wherein: At least one connecting shaft (605) is arranged on the end surface of the moving plate (604), and the connecting shaft (605) is fixedly connected with one of the connecting rods (501).

Images