Synchronous jaw opening mechanism and puller tool using the same

Abstract

The present invention relates to a synchronous jaw opening mechanism and a puller tool using the same, which includes a jaw base, at least two jaw arms, and an opening jaw body, wherein each jaw arm is pivotally mounted on the jaw base, and the opening jaw body can elastically slide within the jaw base. In addition, the end edge of each jaw arm is formed with at least one protrusion that passes through the jaw base and is driven by the opening jaw body, so that each jaw arm can swing between an open position and a closed position relative to the clamping base. In this way, the structure can be simplified, the opening and closing range of the jaw arm can be increased, and its practicality can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of jaw opening, and more specifically to a synchronous jaw opening mechanism that can be opened and closed synchronously and a puller tool using the same, thereby effectively simplifying the structure and effectively increasing the angle range of jaw opening and closing, thereby improving the flexibility of application. Background Art

[0002] Many mechanical devices or hand tools are designed with multi-claw opening mechanisms for grabbing, hooking or driving various objects. For efficiency and convenience, the claw arms on these opening mechanisms need to be driven synchronously to open or close relative to each other, such as puller tools for disassembling and assembling ring components, and clamping tools for grabbing materials.

[0003] The existing claw opening mechanism is based on a claw seat outer edge pivot with a plurality of hooks extending along the axis of the claw seat, and in order to synchronously drive the hooks, an axially displaceable brake is provided on the claw seat, and a connecting rod mechanism is provided between the brake and the hooks to synchronously drive. However, the setting of the connecting rod mechanism not only has the problem of complex structure, but is also limited by the movable angle between the connecting rods, so that the opening range of each hook that can be opened outward or closed inward is also limited. Usually, it can only be equal to or slightly larger than the outer diameter of the claw seat, which cannot meet the operation requirements and also affects the flexibility of its operation. As a result, users need to prepare tools of more specifications, which invisibly increases the manufacturer's procurement cost.

[0004] In other words, since the existing claw mechanism faces the aforementioned problems in use, how to develop an innovative structure that can be more ideal and practical is indeed a goal and direction that the relevant industry needs to further consider and break through, which is also what the present invention intends to explore. Summary of the Invention

[0005] Therefore, the present inventors have conducted in-depth research on the aforementioned issues and, drawing on years of experience in research and development in related industries, have actively sought solutions. After continuous research and trial production, they have finally successfully developed a synchronous jaw opening mechanism and a puller tool using the same, thereby overcoming the problems and inconveniences caused by the limited jaw opening range of existing pullers.

[0006] Based on this, the present invention mainly achieves the aforementioned objectives and effects through the following technical means, which include:

[0007] a claw seat having a mounting chamber therein;

[0008] At least two claw arms, which can be pivotally mounted on the outer edge of the claw base, and each claw arm end edge is formed with at least one protruding rafter that penetrates into the claw base mounting chamber;

[0009] An opening claw body can be arranged in the installation chamber of the claw base, and an embedding portion is formed on the outer edge of the opening claw body for embedding the protruding rafters of each claw arm that penetrates the claw base;

[0010] The main body of the opening claw is used to synchronously drive the protruding rafters of each claw arm to move, so that each claw arm can swing between an open position and a closed position relative to the clamping base.

[0011] In this way, by driving the opening claw body to synchronously drive the convex rafters of each claw arm to move, each claw arm can rotate between an open position and a closed position relative to the clamping base, thereby effectively simplifying the structure and increasing the opening and closing range of the claw arm, thereby increasing the operating range, reducing product specifications, reducing procurement costs, improving operational convenience and flexibility, and enhancing its practicality.

[0012] The present invention further achieves the aforementioned objectives and effects by utilizing the following technical means:

[0013] The claw seat is formed with at least two pivotal parts on its periphery, and each of the pivotal parts is composed of two opposite pivot ears. A long through hole is formed on the wall of the claw seat between the two pivot ears for the claw arm to pass through, and each claw arm has a pivotal part at the top end that can be clamped between the two pivot ears of the pivotal part of the claw seat, and a relative pivot hole is formed on the pivotal part of the claw seat and each claw arm, so that each claw arm can be pivoted on the claw seat using a pivot member.

[0014] The embedded card portion can be composed of a plurality of through holes with the same height and corresponding to the long through holes of the claw seat.

[0015] An elastic member is provided between the opening claw body and the claw seat, so that the opening claw body can generate a pre-force for reverse reset after relative displacement.

[0016] The claw seat and the open claw body can be relatively linearly displaced back and forth in a spiral manner, and the embedding portion of the open claw body forms an annular embedding groove for the protruding rafters of each claw arm to penetrate and embed.

[0017] The inner edge of the mounting chamber of the claw seat has a threaded section, and the outer edge of the open claw body has a threaded section opposite to the threaded section of the claw seat, so that the open claw body and the claw seat can be spirally moved back and forth through the threaded section.

[0018] The elastic member may be a compression spring disposed between the opening claw body and the claw seat.

[0019] Therefore, the main advantage of the present invention is to provide a synchronous jaw opening mechanism, which can effectively simplify the structure and increase the jaw opening range of the jaw arm, thereby improving the convenience and flexibility of operation.

[0020] Furthermore, another major advantage of the present invention is that it provides a synchronous jaw opening mechanism, which allows the jaw arm to open and close the jaws synchronously and significantly, thereby increasing the operable range, thereby reducing product specifications and lowering procurement costs.

[0021] In addition, another major advantage of the present invention is to provide a puller tool using a synchronous jaw opening mechanism, which can effectively increase the working stroke of disassembly, can be adapted to different disassembly requirements, and improve its practicality.

[0022] In order to further understand the composition, features and other purposes of the present invention, several preferred embodiments of the present invention are given below and described in detail with reference to the drawings, so that those familiar with the technical field can implement them. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional appearance schematic diagram of a preferred embodiment of the synchronous jaw opening mechanism of the present invention.

[0024] Figure 2 This is a perspective exploded schematic diagram of a preferred embodiment of the synchronous jaw opening mechanism of the present invention, used to illustrate the state of its various components and their relative relationships.

[0025] Figure 3 It is a side cross-sectional schematic diagram of a preferred embodiment of the synchronous claw opening mechanism of the present invention, used to illustrate its composition and the state of the claw arm when it is closed.

[0026] Figure 4 This is a cross-sectional diagram of the first action of a preferred embodiment of the synchronous claw opening mechanism of the present invention during actual use, for illustrating the state of the claw arm when it is opened.

[0027] Figure 5 This is a schematic cross-sectional view of a second action of a preferred embodiment of the synchronous claw opening mechanism of the present invention during actual use, for illustrating the state of the claw arm when it is closed.

[0028] Figure 6 It is a three-dimensional schematic diagram of another preferred embodiment of the synchronous jaw opening mechanism of the present invention.

[0029] Figure 7 The figure is a schematic diagram of the appearance of a synchronous jaw opening mechanism of the present invention applied to a puller tool.

[0030] Figure 8 The figure is an exploded schematic diagram of the synchronous jaw opening mechanism of the present invention applied to a puller tool.

[0031] Figure 9 The figure is a side cross-sectional schematic diagram of the synchronous jaw opening mechanism of the present invention applied to a puller tool, for illustrating its composition and operation state.

[0032] Figure 10This is a schematic diagram of the appearance of another embodiment of the synchronous jaw opening mechanism of the present invention applied to a puller tool.

[0033] Figure 11 FIG2 is a perspective exploded schematic diagram of another preferred embodiment of the synchronous jaw opening mechanism of the present invention, illustrating the state of its various components and their relative relationships.

[0034] Figure 12 It is a side cross-sectional schematic diagram of another preferred embodiment of the synchronous claw opening mechanism of the present invention, used to illustrate its composition and the state of the claw arm when it is closed.

[0035] Figure 13 This is a cross-sectional view of another preferred embodiment of the synchronous claw opening mechanism of the present invention in the first action during actual use, for illustrating the state of the claw arm when it is opened.

[0036] Figure 14 This is a schematic cross-sectional view of the second action of another preferred embodiment of the synchronous claw opening mechanism of the present invention during actual use, for illustrating the state of its claw arm when it is closed.

[0037] Explanation of the reference numerals: 10-claw seat; 11-installation chamber; 12-screw hole; 13-threaded section; 15-pivot portion; 16-pivot ear; 17-pivot hole; 18-long through hole; 181-closing limit surface; 182-opening limit surface; 19-pressure plate; 20-claw arm; 21-hook portion; 22-pivot portion; 23-pivot hole; 24-pivot member; 25-convex rafter; 251-closing limit surface; 252-opening limit surface; 30-opening claw body; 31-through hole; 32-embedded portion; 33-through-hole; 34-pressure plate; 35-elastic member; 36-annular embedding groove; 38-threaded section; 40-screw; 80-annular member; 85-assembly shaft. DETAILED DESCRIPTION

[0038] The present invention relates to a synchronous jaw opening mechanism and a puller tool employing the same. In the accompanying drawings illustrating specific embodiments of the invention and its components, all references to front and rear, left and right, top and bottom, upper and lower, and horizontal and vertical are for ease of description only and are not intended to limit the invention or its components to any particular position or spatial orientation. Dimensions specified in the drawings and description may vary according to the design and requirements of the invention without departing from the scope of the claims.

[0039] The synchronous jaw opening mechanism of the present invention is mainly composed of the following Figure 1 、 Figure 2 and Figure 11 As shown, it is composed of a claw base 10, at least two claw arms 20 and an opening claw body 30, so that the opening claw body 30 can synchronously drive each claw arm 20 on the claw base 10 to rotate between an open position and a closed position;

[0040] As for the detailed structure of the preferred embodiment of the present invention, it is as follows Figure 2 、 Figure 3 As shown, the claw seat 10 is cylindrical, and a through-mounting chamber 11 is formed inside the claw seat 10, and the periphery of the claw seat 10 has at least two pivoting portions 15 (such as Figure 6 The pawl base 10 includes three pivotal portions 15 and three claw arms 20. Each pivotal portion 15 is formed with two opposing pivot ears 16. Each pivot ear 16 has a pivot hole 17 formed therein. This allows each pivotal portion 15 to clamp the claw arms 20 relative to each other using the two pivot ears 16. Furthermore, the pawl base 10 includes at least one elongated through hole 18 communicating with the mounting chamber 11 formed at each pivotal portion 15. The present invention primarily utilizes one elongated through hole 18 formed between the two pivot ears 16. Furthermore, the upper and lower edges of each elongated through hole 18 are respectively formed with a closing limit surface 181 and an opening limit surface 182 to limit the closing and opening angles of the claw arms 20.

[0041] The claw arm 20 is formed with a pivot portion 22 corresponding to the pivot portion 15 of the claw seat 10 near the top, and the pivot portion 22 has a pivot hole 23 for using a pivot member 24 to pass through the pivot holes 17 and 23 of the claw arm 20 and the claw seat 10, so that each claw arm 20 can be pivoted on the claw seat 10, wherein the pivot member 24 can be composed of a detachable bolt rod and nut, or a pivot rod, so as to facilitate the disassembly and replacement of claw arms 20 of different specifications. Furthermore, the top base of each claw arm 20 is respectively formed with at least one convex rafter 25 that can penetrate the claw seat 10, and the claw arm 20 of the present invention is mainly implemented by a convex rafter 25 corresponding to the long through hole 18 of the pivot portion 15. In this embodiment, the upper and lower widths of the protruding rafter 25 are smaller than the upper and lower widths of the long through hole 18, so that the claw arm 20 can use the protruding rafter 25 to rotate in the long through hole 18 of the claw base 10. A closing limit surface 251 and an opening limit surface 252 are respectively formed on the upper and lower edges of the protruding rafter 25 of the claw arm 20, for cooperating with the closing limit surface 181 and the opening limit surface 182 of the long through hole 18 to limit the closing angle and the opening angle of the claw arm 20. The closing limit surface 251 and the opening limit surface 252 of the protruding rafter 25 are inclined to converge toward the free end, so that the angles of the closed position and the open position of each claw arm 20 can be increased without changing the structure.

[0042] The other jaw body 30 is movably disposed inside the mounting chamber 11 of the jaw seat 10, and the jaw body 30 can be driven by an external force (such as manual or other power source) to move linearly back and forth relative to the jaw seat 10, and the outer edge of the jaw body 30 is formed with an embedded portion 32 near the bottom edge, and the embedded portion 32 can be a plurality of through-holes 33 of equal height corresponding to the long through hole 18 of the jaw seat 10, a non-through embedded groove (not shown in the figure) or a non-through annular embedded groove 36 (such as Figure 11As shown in the figure, the convex rafters 25 of each claw arm 20 are embedded, so that when the opening claw body 30 moves up and down, each claw arm 20 can be synchronously driven to close inward or open outward with the pivot portion 22 as the center. The embedding portion 32 of the present invention is mainly implemented with a through-hole 33 that is relatively long through hole 18, which can ensure the strength of the opening claw body 30 and lengthen the length of the convex rafters 25 of the claw arm 20, so that the combination of the two is more reliable and stable, so that the convex rafters 25 of the claw arm 20 will not break or slip off at will. According to some embodiments, an elastic member 35 is provided between the jaw body 30 and the jaw base 10, so that the jaw body 30 can generate a pre-force for automatically returning to its original position after displacement. For example, after the jaw body 30 moves downward and drives the jaw arms 20 to open outward, the jaw body 30 can automatically return to its original position and drive the jaw arms 20 to automatically close inward. The elastic member 35 of the present invention is mainly implemented as a compression spring provided between the top surface of the jaw body 30 and the bottom surface of the mounting chamber 11 of the jaw base 10. Therefore, the elastic member 35 is hidden within the jaw body 30 and is not exposed to the outside and may accidentally pinch a person, thereby improving safety in use.

[0043] In this way, the claw opening body 30 can be driven to drive the claw arms 20 on the claw seat 10 to swing synchronously between the open position and the closed position, thereby forming a synchronous claw opening mechanism with a simple structure and a large opening angle.

[0044] As for the actual drive of the synchronous opening claw mechanism of the present invention, it is as follows Figure 3 As shown, before use, the opening claw body 30 on the claw seat 10 is pre-loaded upward by the elastic member 35, so that the opening claw body 30 can drive the protruding rafters 25 of each claw arm 20 on the claw seat 10 upward, so that each claw arm 20 is in a downward closed state with the pivot member 24 as the axis. Moreover, since the protruding rafters 25 of each claw arm 20 are in relative contact with the upper edge closing limit surfaces 251 and 181 of the long through hole 18 of the claw seat 10, when each claw arm 20 of the present invention is closed to the minimum angle, the upward movement of the opening claw body 30 can be limited and the opening claw body 30 can be prevented from being dislodged by the elastic force of the elastic member 35. Therefore, the opening claw body 30 of the present invention does not need to be provided with an additional fixing or limiting mechanism.

[0045] When the claw arm 20 is to be driven, Figure 3 、 Figure 4 As shown, the jaw body 30 on the jaw seat 10 is driven downward, and the downward pressing action can be performed manually by the operator or by other power sources such as a linear pressure cylinder or a screw, so that the jaw body 30 moves downward and the elastic member 35 is compressed synchronously to generate a restoring preload. When the jaw body 30 moves downward, the jaw arms 20 pivoted on the jaw seat 10 can be synchronously driven to protrude downward 25, so that each of the jaw arms 20 can be opened outward to a desired angle with the jaw seat 10 as the axis. Figure 4As shown in the present invention, when the claw arms 20 are opened to the maximum angle, the opening limit surface 182 of the lower edge of the protruding rafter 25 of each claw arm 20 can abut against the opening limit surface 182 of the lower edge of the long through hole 18 of the claw base 10;

[0046] On the contrary, if Figure 5 As shown, when the opening claw body 30 on the claw seat 10 is driven upward, or when the opening claw body 30 is upward due to the preload of the elastic member 35, the opening claw body 30 can synchronously drive the claw arm 20 protruding rafter 25 upward, so that each claw arm 20 can be closed inward to the desired angle with the claw seat 10 as the pivot point.

[0047] The synchronous jaw opening mechanism of the present invention can be applied to different fields, such as Figure 7 、 Figure 8 、 Figure 9 and Figure 10 A puller tool is shown, wherein Figure 7 、 Figure 8 、 Figure 9 It is a puller tool for the two-claw arm 20, and Figure 10 The present invention is a puller tool with three jaw arms 20. A pusher is provided between the jaw base 10 and the main jaw body. The pusher can be a screw, a cylinder with a telescopic rod, or other element capable of linear displacement relative to the jaw base 10. The pusher of the present invention is primarily a screw 40. After each jaw arm 20 synchronously clamps an annular member 80 on an assembly shaft 85, the screw 40, which is screwed to the jaw base 10, can be used to push the assembly shaft 85, allowing the annular member 80 to be displaced relative to the jaw base 10.

[0048] As for the detailed structure of this embodiment, a screw hole 12 is formed at the center of the bottom surface of the mounting chamber 11 of the claw seat 10 for the aforementioned screw 40 to be screwed on, and a pressure plate 19 is provided at the outer edge of the top end of the claw seat 10, and each of the claw arms 20 has a hook portion 21 at the bottom edge of the annular member 80, and a through hole 31 corresponding to the aforementioned screw hole 12 is formed at the top end of the opening claw body 30 for the top end of the screw 40 to pass through, and a pressure plate 34 is provided at the outer edge of the top end of the opening claw body 30, so that the operation is to manually press the pressure plates 19 and 34 of the claw seat 10 and the opening claw body 30 to drive the opening claw body 30 to drive each of the claw arms 20.

[0049] Furthermore, when the puller tool with the synchronous jaw opening mechanism of the present invention is used in actual operation, Figure 9As shown, when the opening claw body 30 on the claw seat 10 is driven to move upward under the restoring preload of the elastic member 35, and the convex rafters 25 of each claw arm 20 on the claw seat 10 are driven to move upward synchronously, one end of the hook portion 21 of each claw arm 20 can be closed downward, and the hook portion 21 of each claw arm 20 can be synchronously and smoothly hooked on the bottom edge of the annular member 80, and then the screw 40 is used to push and push the assembly shaft 85 downward. Since the annular member 80 is hooked by the bottom edge by the hook portion 21 of each claw arm 20 of the claw seat 10, the assembly shaft 85 is pushed by the screw 40 and generates relative movement with the annular member 80, so that the assembly shaft 85 and the annular member 80 can be gradually separated, and finally the annular member 80 can be completely disengaged from the assembly shaft 85.

[0050] Another preferred embodiment of the present invention is as follows Figure 11 、 Figure 12 As shown, the claw seat 10 and the open claw body 30 can be relatively displaced by a spiral manner, wherein the inner edge of the mounting chamber 11 of the claw seat 10 has a threaded section 13, and the outer edge of the open claw body 30 has a threaded section 38 relative to the threaded section 13, so that the open claw body 30 and the claw seat 10 can be spirally displaced by the threaded sections 38 and 13, and the embedded portion 32 of the open claw body 30 can be an annular embedded groove 36 that is not penetrated, for the convex rafters 25 of each of the claw arms 20 to penetrate and be embedded, so that when the open claw body 30 moves up and down, it can synchronously drive each of the claw arms 20 to open outward with the pivot portion 15 of the claw seat 10 as the center (as shown in FIG. Figure 13 as shown) or closed inwards (as Figure 14 shown).

[0051] The actual drive of the above embodiment of the synchronous opening claw mechanism is as follows Figure 12 As shown, before use, the claw seat 10 can be screwed upward relative to the claw body 30, so that the claw body 30 can drive the protrusions 25 of each claw arm 20 to move upward synchronously through the annular groove 36 of the locking portion 32, so that each claw arm 20 can be closed synchronously to the central axis of the claw seat 10. When the claw arm 20 is to be driven to open the claw, as shown in FIG. Figure 13 As shown, the claw body 30 on the claw seat 10 is rotated to move downward. When the claw body 30 moves downward, it can synchronously drive the protruding rafter 25 of the claw arm 20 pivoted on the claw seat 10 downward, so that each claw arm 20 can be opened outward to the desired angle with its pivot point with the claw seat 10 as the axis. Conversely, when the claw arm 20 is to be driven to close the claw again, as shown in FIG. Figure 14 As shown, the claw body 30 on the claw seat 10 is rotated in the opposite direction to move upward, so that each claw arm 20 can be closed inward to a desired angle at the pivot point with the claw seat 10 as the axis.

[0052] Through the above-mentioned design and description, the synchronous claw opening mechanism of the present invention can drive the plurality of claw arms 20 pivoted on the claw seat 10 to synchronously open outward or close inward by driving the claw opening body 30 on the claw seat 10. The synchronous claw opening mechanism of the present invention is not only simple in structure, but also because each claw arm 20 can move synchronously, the amplitude of opening and closing of the claw arm 20 is increased, thereby increasing the operable range, thereby reducing product specifications, reducing procurement costs, improving operational convenience and flexibility, and enhancing its practicality.

[0053] The above description is only illustrative of the present invention and not restrictive. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, and all of them will fall within the scope of protection of the present invention.

Claims

1. A synchronous jaw opening mechanism, characterized in that: Includes: a claw seat having a mounting chamber therein; At least two claw arms, each pivotally mounted on an outer edge of the claw base, each claw arm having at least one protruding rafter formed on its end edge and extending into a mounting chamber of the claw base. The wall surface of the claw base has a long through hole corresponding to each claw arm for the protruding rafter to pass through, and the upper and lower edges of each long through hole are capable of limiting the closing angle and opening angle of the claw arm; An opening claw body is disposed in the mounting chamber of the claw seat, and an inserting portion is formed on the outer edge of the opening claw body for inserting the protruding rafters of each claw arm of the claw seat. A compression spring is disposed between the opening claw body and the claw seat to generate a preload force for reverse reset after relative displacement of the opening claw body; The main body of the opening claw is used to drive the protruding rafters of each claw arm to move synchronously, so that each claw arm can swing between an open position and a closed position relative to the claw seat.

2. The synchronous jaw opening mechanism according to claim 1, wherein: At least two pivotal portions are formed on the periphery of the claw seat, and each of the pivotal portions is composed of two opposing pivot ears. A long through hole is formed on the wall of the claw seat between the two pivot ears for the claw arm protrusion to pass through. The top of each claw arm has a pivotal portion that can be clamped and pivoted between the two pivot ears of the pivotal portion of the claw seat, and a corresponding pivot hole is formed on the pivotal portion of the claw seat and each of the claw arms, for each of the claw arms to be pivotally mounted on the claw seat using a pivot member.

3. The synchronous jaw opening mechanism according to claim 2, characterized in that: The embedded card portion is composed of a plurality of through holes with the same height and corresponding to the long through holes of the claw seat.

4. The synchronous jaw opening mechanism according to claim 1, wherein: The claw seat and the opening claw body are linearly displaced relative to each other in a spiral manner, and the embedding portion of the opening claw body forms an annular embedding groove for the protruding rafters of each claw arm to penetrate and embed.

5. The synchronous jaw opening mechanism according to claim 4, characterized in that: The inner edge of the mounting chamber of the claw seat has a threaded section, and the outer edge of the opening claw body has a threaded section opposite to the threaded section of the claw seat, so that the opening claw body and the claw seat can be spirally moved back and forth through the threaded section.

6. A puller tool using the synchronous jaw opening mechanism according to any one of claims 1 to 5, for removing an annular component from an assembly shaft, characterized in that: The axis of the claw seat of the synchronous claw opening mechanism is provided with a pushing piece capable of linear displacement, so that when the claw arm of the synchronous claw opening mechanism hooks the annular component, the pushing piece can be used to linearly displace the assembly shaft.

7. The puller tool according to claim 6, wherein: The pushing member is a screw rod screwed on the claw seat, and is used to push and push the assembly shaft by screwing the screw rod.

8. The puller tool according to claim 6, wherein: The pushing member is a pressure cylinder arranged on the claw seat, and the pressure cylinder is provided with a telescopic rod capable of linear displacement, so as to push the assembly shaft by driving the telescopic rod of the pressure cylinder.

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