Snap spring pliers

Abstract

The clamp spring pliers comprise a clamp spring pliers body, a fixed clamping jaw and a guide sliding groove are arranged on the clamp spring pliers body, the fixed clamping jaw is located at one end of the guide sliding groove, and a movable clamping jaw is arranged along the guide sliding groove in a sliding mode. The other end of the guide sliding groove is communicated with a threaded hole in the clamp spring plier body, a handle is installed in the threaded hole in a threaded fit mode, the inner end of the handle is rotationally connected with the movable clamping jaw through a connecting assembly and axially limited at the same time, and the outer end of the handle serves as a force application end to be exposed out of the clamp spring plier body. The clamp spring pliers are low in use space requirement, stable in stress, convenient to control and capable of solving the technical problems that an existing clamp spring plier is inconvenient to use in a narrow space, not easy to control and the like.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical equipment disassembly and assembly tools, and in particular relates to a circlip pliers. Background Art

[0002] Circlip, also known as retaining ring or snap ring, is a kind of fastener. It is installed in the shaft groove or hole groove of machines and equipment to prevent the axial movement of parts on the shaft or hole.

[0003] Circlip pliers are special tools for disassembling and assembling circlips. They are a pliers-type structure that utilizes the principle of a lever. One end is a hand-held end for the user to hold and apply force, and the other end is a clamping end for clamping the two ends of the circlip, thereby achieving disassembly and assembly of the circlip.

[0004] Since the current circlip pliers use the lever principle, the longer the handheld end is, the less effort is required. However, the longer the handheld end is, the more space is needed for operation. At the same time, the longer the handheld end is, the heavier the circlip pliers are, the farther the clamping end is from the user, and the more difficult it is to control when using it, and it is difficult to smoothly insert the clamping end into the holes at both ends of the circlip. In addition, when using the circlip pliers, the user needs to always hold the handheld end of the circlip pliers tightly, which makes the disassembly process time-consuming and laborious.

[0005] For example, when aerial cranes are disassembling large and small wheel bearing seats, they generally use traditional pliers-type circlip pliers to disassemble holes and axle gravity circlips. This is an aerial operation, but the maintenance space is limited. Therefore, there are the problems mentioned above, such as limited space, difficulty in control, time-consuming and labor-intensive. It is easy to cause personnel safety accidents and circlips falling off, posing a great safety hazard. Utility Model Content

[0006] The utility model aims to provide a circlip pliers which no longer use a pliers structure based on the lever principle, have low requirements on the use space, are stable in force, and are easy to operate, thereby solving the technical problems of the current pliers type circlip pliers, such as being inconvenient to use in a narrow space and being difficult to operate.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a kind of circlip pliers, including a circlip pliers body, a fixed claw and a guide groove are arranged on the circlip pliers body, the fixed claw is located at one end of the guide groove, and a movable claw is arranged to slide along the guide groove; the other end of the guide groove is connected with the threaded hole on the circlip pliers body, and a handle is installed in the threaded hole in a threaded matching manner, and the inner end of the handle is axially limited while being rotatably connected with the movable claw through a connecting component, and the outer end of the handle is exposed from the circlip pliers body as a force-applying end.

[0008] The beneficial effects are as follows: the utility model adopts a screw structure to realize the opening and closing of the two claws, which can make the entire circlip pliers structure more compact, small and light. When in use, the operating end of the handle is located on one side of the circlip, so the required operating space is smaller, which is more convenient for use in narrow spaces; and the locking effect of the screw structure can maintain the relative position of the two claws, so it is more labor-saving during use.

[0009] As an embodiment, the connecting assembly includes a ball socket arranged on the movable claw, a ball head arranged on the end face of the handle, and a retaining ring. The ball head and the ball socket form a ball pair. The ball head and the end face of the handle are connected by a limiting portion. The diameter of the limiting portion is smaller than the maximum diameter of the ball head, and the maximum diameter of the ball head is smaller than the diameter of the handle. The retaining ring is sleeved on the limiting portion, the outer cylindrical surface of the retaining ring is fixed in the annular groove on the movable claw, the inner cylindrical surface of the retaining ring is in fit contact with the limiting portion, and the thickness of the retaining ring is consistent with the axial length of the limiting portion.

[0010] The beneficial effect is that the ball pair formed by the ball socket and the ball head can realize the rotation of the handle relative to the movable claw, and under the limiting effect of the clamping ring, the push and pull force of the handle can be transmitted to realize the linear movement of the movable claw, and the clamping ring can prevent the ball head from falling off.

[0011] The spherical surface of the ball head is a hemispherical surface.

[0012] The outer circumferential surface of the clamping ring is welded in the annular groove of the movable clamping claw.

[0013] The beneficial effect is that the welding method can make the clamping ring more reliably fixed.

[0014] As another embodiment, the connecting assembly includes a circular groove arranged on the movable claw, a circular flat plate arranged on the end face of the handle, and a snap ring; the circular groove and the circular flat plate form a rotating pair with the center of the circular groove as the axis, the circular flat plate is connected to the end face of the handle through a limiting portion, the diameter of the limiting portion is smaller than the diameter of the circular flat plate, and the diameter of the circular flat plate is smaller than the diameter of the handle; the snap ring is sleeved on the limiting portion, the outer circular surface of the snap ring is fixed in the annular groove on the movable claw, the inner circular surface of the snap ring is in fit contact with the limiting portion, and the thickness of the snap ring is consistent with the axial length of the limiting portion.

[0015] The beneficial effect is that another structural form of the connecting assembly is provided, and no axial displacement occurs while the rotation of the handle relative to the movable claw is realized.

[0016] Furthermore, the outer circumferential surface of the clamping ring is welded in the annular groove of the movable clamping claw.

[0017] The beneficial effect is that the welding method can make the clamping ring more reliably fixed.

[0018] The outer end of the handle is provided with a connecting hole for installing a rotating tool.

[0019] The beneficial effect is that it is convenient to use a rotating tool, making the disassembly and assembly of the retaining ring more labor-saving.

[0020] The lower part of the movable clamping claw is a rectangular block, and its width is consistent with the width of the guide sliding groove.

[0021] The beneficial effect is that the shaking of the movable claw can be avoided.

[0022] The fixed clamping claw and the movable clamping claw are threadedly connected with clamping heads used for disassembling and assembling the clamping spring.

[0023] The beneficial effect is that the clamping head adopts threaded connection, and the clamping head of suitable size can be replaced according to needs, so that the circlip pliers can be suitable for disassembly and assembly of circlips of more sizes.

[0024] The end of the chuck is provided with an annular step surface.

[0025] The beneficial effect is that the annular step surface can play the role of stopping the retaining spring and limit the depth of the retaining head inserted into the disassembly hole at the end of the retaining spring.

[0026] The beneficial effect of the utility model is that the circlip pliers of the utility model no longer use a lever structure, but a screw structure, and the movable claw is driven to move linearly by the rotation of the handle, so as to realize the disassembly and assembly of the circlip. When the handle is not rotated, the engagement of the thread can maintain the distance between the movable claw and the fixed claw, so as to maintain the force on the circlip, and compared with the traditional pliers structure, the operation is more labor-saving.

[0027] The circlip pliers of the utility model are compact and light in structure, require a small operating space when in use, and are suitable for disassembling and assembling circlips in a narrow space. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the structure of the utility model;

[0030] Figure 2 for Figure 1 Partial view at A in the middle;

[0031] Figure 3 It is a top view of the structure of the utility model;

[0032] Markings in the figure: 1. circlip pliers body, 2. fixed jaw, 3. guide groove, 4. handle, 5. threaded hole, 6. movable jaw, 7. ball head, 8. ball socket, 9. snap ring. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention in any way.

[0034] Example 1: Figure 1 , 3 As shown, a circlip pliers comprises a circlip pliers body 1, a movable jaw 6 and a handle 4. A fixed jaw 2 is provided at one end of the circlip pliers body 1, and the circlip pliers body 1 is provided with a guide slot 3 extending along its length direction. The movable jaw 6 is movably arranged along the guide slot 3, and the handle 4 is used to drive the movable jaw 6 to approach or move away from the fixed jaw 2, thereby realizing the disassembly and assembly of the circlip.

[0035] The fixed jaw 2 is welded and fixed on the circlip pliers body 1, or is an integral structure with the circlip pliers body 1, and a rod-shaped clamp head is provided on the fixed jaw 2. The movable jaw 6 includes a slider and a rod-shaped clamp head on the slider, the clamp head and the slider are an integral structure, the slider is slidably arranged along the guide slot 3, and the clamp head on the slider is located outside the guide slot 3.

[0036] The clamping head ends of the fixed clamping claw 2 and the movable clamping claw 6 are both provided with an annular step surface, so as to better insert the clamping head ends into the disassembly holes at both ends of the clamping spring.

[0037] The other end of the circlip pliers body 1 relative to the fixed jaw 2 is provided with a threaded hole 5 connected to the guide slot 3, and the surface of the handle 4 is processed with an external thread that can cooperate with the threaded hole 5. The end of the handle 4 extending into the guide slot 3 is the inner end of the handle 4, and the end located outside the guide slot 3 is the outer end of the handle 4. The inner end of the handle 4 is rotatably connected to the movable jaw 6. By rotating the outer end of the handle 4, under the cooperation of the external thread and the threaded hole 5, the handle 4 drives the movable jaw 6 to move linearly along the guide slot 3.

[0038] For example Figure 2As shown, a ball socket 8 is provided on one side of the movable claw 6 for connecting with the handle 4, and a ball head 7 that can cooperate with the ball socket 8 to form a ball pair is provided on the inner end surface of the handle 4, so as to realize the rotation connection between the handle 4 and the movable claw 6. The spherical surface of the ball head 7 is a hemispherical surface, and the diameter of the ball head 7 is smaller than the diameter of the handle. A limiting portion is provided between the ball head 7 and the inner end surface of the handle 4, and the diameter of the limiting portion is smaller than the diameter of the ball head 8. A snap ring 9 is installed on the limiting portion, and the inner circumferential surface of the snap ring 9 fits the limiting portion, and the thickness of the snap ring 9 is equal to the length of the limiting portion. The snap ring 9 is welded in the annular groove of the movable claw 6, and the annular groove is located outside the ball socket 8, and the diameter of the annular groove is larger than the diameter of the ball socket 8. The fixed snap ring 9 can not only prevent the ball head 7 from falling off from the ball socket 8, but also transmit the pulling force, so that the handle 4 drives the movable claw 6 to slide along the guide groove 3.

[0039] Furthermore, the lower part of the movable claw 6 is a rectangular block, and its width is consistent with the width of the guide slot 3 to prevent the movable claw 6 from shaking left and right.

[0040] The outer end of the handle 4 is also processed with a connecting hole, and when in use, a metal rod or a tool such as a screwdriver can be inserted into the connecting hole to rotate the handle 4 more labor-savingly.

[0041] Embodiment 2: Based on Embodiment 1, as a variation, the clamping heads on the fixed clamping jaw 2 and the movable clamping jaw 6 can also be connected to the circlip pliers body 1 or the slider in a detachable connection manner, so that the corresponding clamping heads can be replaced according to the size and type of the circlip to be disassembled and assembled. The detachable connection manner is a threaded connection.

[0042] Embodiment 3: In embodiment 1, the handle 4 and the movable claw 6 are rotationally connected via a ball pair, and the handle 4 and the movable claw 6 are limited in the axial direction via a clamping ring 9.

[0043] In this embodiment, a circular flat plate can be used to replace the ball head 7, and a circular groove can be used to replace the ball socket 8 accordingly. A retaining ring 9 can be used to prevent the circular flat plate from falling off the circular groove. Similarly, a rotational connection between the handle 4 and the movable claw 6 can be achieved to prevent the movable claw 6 from hindering the rotation of the handle 4, and there will be no axial relative displacement between the handle 4 and the movable claw 6.

[0044] The structures not described in detail in Embodiment 2 and Embodiment 3 are arranged in the same manner as in Embodiment 1.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can be modified or replaced by equivalents with reference to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the pending claims.

Claims

1. A circlip pliers, comprising a circlip pliers body, characterized in that: A fixed claw and a guide slot are provided on the main body of the circlip pliers. The fixed claw is located at one end of the guide slot, and a movable claw is slidingly provided along the guide slot; the other end of the guide slot is connected to a threaded hole on the main body of the circlip pliers, and a handle is installed in the threaded hole in a threaded matching manner. The inner end of the handle is axially limited while being rotatably connected to the movable claw through a connecting component, and the outer end of the handle is exposed from the main body of the circlip pliers as a force-applying end.

2. The circlip pliers according to claim 1, characterized in that: The connecting assembly includes a ball socket arranged on the movable claw, a ball head arranged on the end face of the handle, and a snap ring. The ball head and the ball socket form a ball pair. The ball head and the end face of the handle are connected by a limiting portion. The diameter of the limiting portion is smaller than the maximum diameter of the ball head, and the maximum diameter of the ball head is smaller than the diameter of the handle. The snap ring is sleeved on the limiting portion, the outer cylindrical surface of the snap ring is fixed in the annular groove on the movable claw, the inner cylindrical surface of the snap ring is in fit contact with the limiting portion, and the thickness of the snap ring is consistent with the axial length of the limiting portion.

3. The circlip pliers according to claim 2, characterized in that: The spherical surface of the ball head is a hemispherical surface.

4. The circlip pliers according to claim 2, characterized in that: The outer circumferential surface of the clamping ring is welded in the annular groove of the movable clamping claw.

5. The circlip pliers according to claim 1, characterized in that: The connecting assembly includes a circular groove arranged on the movable claw, a circular flat plate arranged on the end face of the handle, and a snap ring; the circular groove and the circular flat plate form a rotating pair with the center of the circular groove as the axis, the circular flat plate is connected to the end face of the handle through a limiting portion, the diameter of the limiting portion is smaller than the diameter of the circular flat plate, and the diameter of the circular flat plate is smaller than the diameter of the handle; the snap ring is sleeved on the limiting portion, the outer cylindrical surface of the snap ring is fixed in the annular groove on the movable claw, the inner cylindrical surface of the snap ring is in fit contact with the limiting portion, and the thickness of the snap ring is consistent with the axial length of the limiting portion.

6. The circlip pliers according to claim 5, characterized in that: The outer circumferential surface of the clamping ring is welded in the annular groove of the movable clamping claw.

7. The circlip pliers according to claim 1, characterized in that: The outer end of the handle is provided with a connecting hole for installing a rotating tool.

8. The circlip pliers according to claim 1, characterized in that: The lower part of the movable clamping claw is a rectangular block, and its width is consistent with the width of the guide sliding groove.

9. The circlip pliers according to claim 1, characterized in that: The fixed clamping claw and the movable clamping claw are threadedly connected with clamping heads used for disassembling and assembling the clamping spring.

10. The circlip pliers according to claim 9, characterized in that: The end of the chuck is provided with an annular step surface.

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