Clamp with adjustable jaw size

Abstract

The utility model belongs to the technical field of clamps, and particularly relates to a clamp with a size-adjustable jaw. A clamp capable of adjusting the size of a jaw comprises a fixing frame, the fixing frame is provided with a first sliding plate, a second sliding plate and a driver, a first clamping arm and a second clamping arm are detachably fixed to the first sliding plate and the second sliding plate respectively, and the left-right positions of the first clamping arm and the second clamping arm on the first sliding plate and the second sliding plate are adjustable. First clamping blocks which are oppositely arranged are detachably fixed to the lower end of the first clamping arm and the lower end of the second clamping arm, a jaw of the clamp is formed between the two first clamping blocks, the outer side walls of the first clamping arm and the second clamping arm extend in the vertical direction, and the first clamping arm and the second clamping arm sequentially comprise inclined sections and vertical sections from top to bottom; the inner side wall of the inclined section inclines outwards from top to bottom, and the inner side wall of the vertical section extends in the vertical direction. The clamp has the advantage that the size of the jaw can be further changed when the clamp is at the limit position.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamps, and in particular relates to a clamp with adjustable jaw size. Background Art

[0002] A Chinese patent with application number 202320980924.7 discloses a top hammer flip clamp, including a first clamp arm and a second clamp arm, which are arranged opposite to each other, and the first clamp arm and the second clamp arm clamp the workpiece by approaching each other, and the first clamp arm and the second clamp arm are respectively fixed to the first slide plate and the second slide plate by bolts, and the first slide plate and the second slide plate are each provided with five positioning holes spaced apart in the left-right direction.

[0003] In the above scheme, if the jaw size of the first clamp arm and the second clamp arm in the extreme position is to be changed, the first clamp arm and the second clamp arm can only be fixed to different positioning holes to change the jaw size of the first clamp arm and the second clamp arm in the extreme position, and its versatility is poor. Utility Model Content

[0004] The utility model aims to provide a clamp which can further change the size of the jaws when the clamp is in the extreme position.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a clamp with adjustable jaw size, including a fixed frame extending in the left and right directions, the fixed frame is provided with a first slide plate and a second slide plate spaced apart in the left and right directions and a driver driving the first slide plate and the second slide plate to move towards or away from each other, the first clamp arm and the second clamp arm are respectively detachably fixed to the first slide plate and the second slide plate, and the left and right positions on the first slide plate and the second slide plate are adjustable, the lower ends of the first clamp arm and the second clamp arm are both detachably fixed with first clamp blocks arranged opposite to each other, the jaws of the clamp are formed between the two first clamp blocks, the outer side walls of the first clamp arm and the second clamp arm extend in the up and down directions, the first clamp arm and the second clamp arm include an oblique section and a vertical section in sequence from top to bottom, the inner side walls of the oblique sections are inclined outwards from top to bottom, and the inner side walls of the vertical sections extend in the up and down directions.

[0006] In this solution, when the first slide plate and the second slide plate move to the end (limit position) of the fixing frame, the size of the jaw between the first clamp arm and the second clamp arm is at the limit position. In this solution, the first clamp arm and the second clamp arm can be removed from the first slide plate and the second slide plate respectively, and then fixed to the first slide plate and the second slide plate after being rotated 180°. At this time, the size of the jaw between the lower ends of the first clamp arm and the second clamp arm changes, and then the first clamp block is removed and assembled on the opposite side of the first clamp arm and the second clamp arm, thereby clamping the workpiece.

[0007] Among them, the outer side walls of the first clamp arm and the second clamp arm extend in the up-down direction, the inner side wall of the oblique section is inclined outward from top to bottom, and the inner side wall of the vertical section extends in the up-down direction; when the first clamp arm and the second clamp arm are rotated 180°, the left and right positions of the lower ends of the first clamp arm and the second clamp arm will change, thereby changing the size of the jaws.

[0008] Among them, the left and right positions of the first clamping arm and the second clamping arm on the first slide and the second slide can be adjusted by setting multiple positioning holes in the comparative document, or by adjusting through a screw slide, etc.

[0009] The left-right width refers to the width along the left-right direction.

[0010] The first clamping arm and the second clamping arm can be rotated 180° and then fixed to the first slide plate and the second slide plate by screw locking.

[0011] According to this solution, when the first clamp arm and the second clamp arm are fixed at the extreme positions on the first slide plate and the second slide plate, the first clamp arm and the second clamp arm can be rotated 180° and then fixed again, thereby further changing the size of the jaws. Compared with the comparative document, this clamp has better versatility and a larger adjustable jaw range.

[0012] Preferably, the first slide plate and the second slide plate are both provided with a slide groove extending in the left-right direction, the slider is slidably matched with the slide groove, and the two sliders are respectively connected to the first clamp arm and the second clamp arm; a screw rod extending in the left-right direction is provided in the slide groove, the slider rod is threadedly matched on the screw rod, and the screw rod is rotated by a hand wheel.

[0013] The operator can rotate the hand wheel to rotate the screw rod, and the rotation of the screw rod can realize the movement of the slider on the slide slot, thereby changing the left and right positions of the first clamping arm and the second clamping arm on the first slide plate and the second slide plate respectively, so as to change the size of the jaws. Compared with the comparison file, the adjustment by rotating the hand wheel is more accurate and convenient, and has better versatility.

[0014] Preferably, the slider is provided with a threaded hole extending in the up-down direction, and the upper ends of the first clamp arm and the second clamp arm are provided with through holes penetrating in the up-down direction, and bolts pass through the through holes and are threadedly engaged with the threaded holes.

[0015] By cooperating with the bolts and the threaded holes, the first clamp arm and the second clamp arm can be detachably fixed to the first slide plate and the second slide plate; if there are two screw holes, it is necessary to ensure that the two screw holes are symmetrically arranged in the center, and at the same time, it is necessary to ensure that the through hole is symmetrically arranged in the center; if the screw hole and the through hole are one, it is necessary to ensure that the through hole is located at the center of the upper end of the first clamp arm or the second clamp arm; thereby ensuring that after the first clamp arm and the second clamp arm are turned 180°, the left and right positions of the upper ends of the first clamp arm and the second clamp arm remain unchanged, and only the left and right positions of the lower ends change, so as to adjust the size of the jaws.

[0016] Preferably, the first slide plate and the second slide plate are both provided with dovetail guide rails extending in the left-right direction, and the sliding block is provided with dovetail grooves slidably matched with the dovetail guide rails.

[0017] The cooperation of the dovetail groove and the dovetail guide rail ensures that the slider will not deviate when sliding.

[0018] Preferably, the driver is a linear pusher, one end of which is fixed to the first slide, and the other end of which is fixed to the second slide, and the first slide and the second slide are both equipped with racks extending in the left and right directions, a gear is meshed between the two racks, and the gear is rotatably connected to the fixed frame.

[0019] The rack and the gear cooperate to make the first slide plate and the second slide plate close together or separate synchronously, so that the jaws open and close synchronously.

[0020] Preferably, the first clamping block comprises two clamping plates arranged at an angle to each other.

[0021] Two clamping plates which are at an angle to each other can facilitate clamping of cylindrical workpieces, such as roller rings or top hammer workpieces.

[0022] Preferably, a second clamping block is detachably fixed on the left side wall or the right side wall of the vertical section, and the second clamping block extends in the vertical direction.

[0023] The second clamping block can clamp the workpiece by means of internal support, for example, the first clamping arm and the second clamping arm are extended into the inner hole of the roller ring and are supported outward.

[0024] The utility model has the advantages of being able to further adjust the size of the clamp jaws and having good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model.

[0026] Figure 2 It is a schematic diagram of the structure of the fixed frame.

[0027] Figure 3Schematic diagram of the structure inside the fixed frame.

[0028] Figure 4 It is a structural schematic diagram of the dovetail guide rail.

[0029] Figure 5 for Figure 1 sectional view of .

[0030] Figure 6 for Figure 1 Schematic diagram of the structure of the first clamping arm and the second clamping arm after rotating 180 degrees.

[0031] Figure 7 It is a schematic diagram of the structure of the utility model when clamping the outer ring of the roller ring.

[0032] Figure 8 It is a schematic diagram of the structure of the utility model when the inner ring of the roller ring is supported.

[0033] Fig. 9 It is a schematic diagram of the structure of the utility model when clamping the top hammer.

[0034] Figure numbers: 1, fixed frame; 11, waist-shaped hole; 12, connecting pin; 13, hanging part; 2, driver; 21, first slide; 211, first connecting plate; 22, second slide; 221, second connecting plate; 23, gear; 3, dovetail guide rail; 31, slider; 32, slide groove; 4, hand wheel; 51, first clamping arm; 52, second clamping arm; 61, first clamping block; 611, fixing plate; 612, fixing hole; 62, second clamping block; 71, oblique section; 72, vertical section; 100, top hammer; 200, roller ring. DETAILED DESCRIPTION

[0035] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0036] like Figures 1 to 3As shown, this embodiment discloses a clamp with adjustable jaw size, including a fixed frame 1 extending in the left-right direction, and a hanging portion 13 extending upward and used for hanging is provided at the center of the fixed frame 1. Four waist-shaped holes 11 are provided on the fixed frame 1 at intervals in the left-right direction. A first slide plate 21 and a second slide plate 22 are provided on both the front and rear sides of the fixed frame 1, and a first connecting plate 211 is provided in the fixed frame 1. A connecting pin 12 passes through the waist-shaped holes 11 on the front and rear sides of the fixed frame 1 and is fixedly connected to the first connecting plate 211. The connecting pin 12 slides with the waist-shaped hole 11, thereby realizing the sliding cooperation between the first slide plate 21 and the fixed frame 1. A second connecting plate 221 is provided in the fixed frame 1. The connecting pin 12 passes through the waist-shaped holes 11 on the front and rear sides of the fixed frame 1 and is fixedly connected to the second connecting plate 221. The connecting pin 12 slides with the waist-shaped hole 11, thereby realizing the sliding cooperation between the second slide plate 22 and the fixed frame 1. A driver 2 is provided on the upper side of the fixing frame 1. The driver 2 is a linear pusher and a cylinder. One end of the driver 2 is fixedly connected to the first slide 21, and the other end of the driver 2 is fixedly connected to the second slide 22. The first connecting plate 211 and the second connecting plate 221 are both extended in the left-right direction. The first connecting plate 211 and the second connecting plate 221 are both provided with racks at their ends close to each other. A gear 23 is rotatably connected at the center of the fixing frame 1, and the two racks are meshed with the gear 23.

[0037] like Figures 2 to 5 As shown, a dovetail guide rail 3 extending in the left-right direction is provided at the lower end of the first slide plate 21 and the second slide plate 22, and the dovetail guide rail 3 is provided with a slide groove 32 extending in the left-right direction and extending from top to bottom, and the slider 31 extends into the slide groove 32 and slides with the slide groove 32, and a screw rod 41 extending in the left-right direction is provided in the slide groove 32, and a hand wheel 4 is matched at the end of the screw rod 41, and the screw rod 41 is threadedly matched with the slider 31. The slider 31 is provided with a dovetail groove that slides with the dovetail guide rail 3.

[0038] like Figure 5 and Figure 6As shown, the lower ends of the two sliders 31 are respectively fixed with a first clamp arm 51 and a second clamp arm 52 spaced apart in the left-right direction. The two sliders 31 are provided with two centrally symmetrical screw holes, which are opened downward. The upper ends of the first clamp arm 51 and the second clamp arm 52 are provided with two through holes that penetrate up and down, which are centrally symmetrically arranged. Bolts pass through the through holes and are threadedly matched with the screw holes to achieve detachable fixation. The outer side walls of the first clamp arm 51 and the second clamp arm 52 are vertical surfaces, extending in the up-down direction. The first clamp arm 51 and the second clamp arm 52 both include an oblique section 71 and a vertical section 72 from top to bottom. The left-right width of the oblique section 71 gradually decreases from top to bottom, so that the inner side wall of the oblique section 71 is inclined outward from top to bottom. The left-right width of the vertical section 72 is equal to the smallest left-right width of the oblique section 71. The inner side wall of the vertical section 72 is a vertical surface extending in the up-down direction. The front side and the rear side of the vertical section 72 are each provided with two fixing holes 612 spaced apart from each other. The first clamping block 61 includes two clamping plates arranged at an obtuse angle and a fixing sheet 611 for fixing the two clamping plates. A bolt passes through the fixing sheet 611 and is threadedly engaged with one of the fixing holes 612. The vertical section 72 can also be detachably fixed with a second clamping block 62 by bolts. The second clamping block 62 extends in the up-down direction.

[0039] In actual operation, the operator drives the driver 2 to operate, so that the first slide plate 21 and the second slide plate 22 move toward or away from each other, thereby realizing the first clamping arm 51 and the second clamping arm 52 move toward or away from each other, so that the circumferential outer wall of the top hammer 100 and the roller ring 200 can be clamped (such as Figure 7 and Fig. 9 When the roller ring 200 needs to be clamped by internal support, the first clamp arm 51 and the second clamp arm 52 are extended into the inner hole of the roller ring 200 to clamp it by internal support (as shown in FIG. Figure 8 as shown).

[0040] When the diameter of the workpiece to be clamped is small, the operator can turn the hand wheel 4 to make the two sliders 31 move closer to each other, thereby adjusting the size of the jaws of the clamp. However, when the slider 31 slides to the bottom (inner end limit position), the workpiece cannot be clamped, the operator can remove the first clamp arm 51 and the second clamp arm 52 from the slider 31, remove the first clamp block 61 from the vertical section 72, rotate the first clamp arm 51 and the second clamp arm 52 by 180 degrees, so that the vertical surface of the oblique section 71 is located on the inner side, and then reinstall the first clamp arm 51 and the second clamp arm 52 with the slider 31, and install the first clamp block 61 on the relative inner side of the first clamp arm 51 and the second clamp arm 52, thereby clamping the workpiece with a smaller diameter.

[0041] When the diameter of the workpiece to be clamped is large, the operator can rotate the hand wheel 4 to move the two sliders 31 away from each other, thereby adjusting the size of the jaws of the clamp. However, when the slider 31 slides to the bottom (the outer limit position) and still cannot clamp the workpiece, the first clamp arm 51 and the second clamp arm 52 are removed, and the vertical surface of the inclined section 71 is located outside, and the above operation is repeated, so that the workpiece with a larger diameter can be clamped.

Claims

1. A clamp with adjustable jaw size, comprising a fixing frame extending in the left-right direction, the fixing frame being provided with a first slide plate and a second slide plate spaced apart in the left-right direction, and a driver for driving the first slide plate and the second slide plate to move toward or away from each other, characterized in that: The first clamp arm and the second clamp arm are respectively detachably fixed to the first slide plate and the second slide plate and the left and right positions on the first slide plate and the second slide plate are adjustable; the lower ends of the first clamp arm and the second clamp arm are detachably fixed with first clamp blocks which are relatively arranged; the jaws of the clamp are formed between the two first clamp blocks; the outer side walls of the first clamp arm and the second clamp arm extend in the up-down direction; the first clamp arm and the second clamp arm include an oblique section and a vertical section in sequence from top to bottom; the inner side wall of the oblique section is inclined outward from top to bottom, and the inner side wall of the vertical section extends in the up-down direction.

2. The clamp with adjustable jaw size according to claim 1, characterized in that: The first slide plate and the second slide plate are both provided with a slide groove extending in the left-right direction, and the slider is slidably matched with the slide groove, and the two sliders are respectively connected to the first clamp arm and the second clamp arm; a screw rod extending in the left-right direction is provided in the slide groove, and the slider is threadedly matched on the screw rod, and the screw rod is rotated by a hand wheel.

3. The clamp with adjustable jaw size according to claim 2, characterized in that: The slider is provided with a threaded hole extending in the up-down direction, and the upper ends of the first clamp arm and the second clamp arm are provided with a through hole penetrating in the up-down direction, and the bolt passes through the through hole and is threadedly engaged with the threaded hole.

4. The clamp with adjustable jaw size according to claim 2, characterized in that: The first slide plate and the second slide plate are both provided with dovetail guide rails extending in the left-right direction, and the sliding block is provided with dovetail grooves slidably matched with the dovetail guide rails.

5. The clamp with adjustable jaw size according to any one of claims 1 to 4, characterized in that: The driver is a linear pusher, one end of which is fixed to the first slide, and the other end of which is fixed to the second slide. The first slide and the second slide are both equipped with racks extending in the left and right directions, and a gear is meshed between the two racks, and the gear is rotatably connected to the fixed frame.

6. The clamp with adjustable jaw size according to any one of claims 1 to 4, characterized in that: The first clamping block includes two clamping plates arranged at an angle to each other.

7. The clamp with adjustable jaw size according to any one of claims 1 to 4, characterized in that: A second clamping block is detachably fixed on the inner side wall or the outer side wall of the vertical section, and the second clamping block extends in the vertical direction.

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