Mechanical pulling device

Abstract

The present invention relates to a mechanical pulling device, which comprises a claw seat, at least two hook claw arms, a claw opening slide cylinder and a screw member screwed on the claw seat, wherein each of the hook claw arms is pivotally mounted on the claw seat, and the claw opening slide cylinder can slide elastically in the claw seat, and each of the hook claw arms has at least one protruding rafter passing through the claw seat and driven by the claw opening slide cylinder, so that each of the hook claw arms can swing between an open position and a closed position relative to the clamp seat, so that an annular component can be easily operated and quickly removed from the device, and the annular component can be stably hooked and locked without slipping off at will, thereby greatly improving the safety of its operation.

Description

Technical Field

[0001] The present invention relates to the technical field of a pulling tool, and more specifically to a mechanical pulling device with a simple structure and a long working stroke, which can increase the angles of opening and closing jaws, and has the effects of easy operation and quick disassembly, thereby improving the safety of operation. Background Art

[0002] Various circular discs, bearings, gears, pulleys and other annular components are fixed on the assembly shaft to produce linkage. When the annular component and the assembly shaft need to be separated, a puller is mainly used. The existing puller is a claw seat outer edge pivotally provided with a plurality of claws for hooking the annular component, and the center of the claw seat is provided with a push element (such as a screw or a hydraulic cylinder) that can selectively push the top of the assembly shaft, so that the assembly shaft can be pushed by operating the push element, so that the annular component and the assembly shaft can be relatively displaced and separated. However, the claws of the traditional puller cannot be opened synchronously, and the closing is completed by the downward deadweight of the claws. Therefore, the opening and closing action of the claws needs to be opened individually, and when hooking the annular component, special attention should be paid to whether each claw is hooked smoothly and synchronously, which is extremely inconvenient in operation. If it is not hooked smoothly and synchronously, the claws may slip during the disassembly operation, causing safety concerns;

[0003] To this end, the industry provides a variety of claws on the claw seat can be synchronized to open or close the claw structure, such as Figure 1 In the US patent case US05,887,328 shown, a plurality of downward hook claws 91 are pivotally provided on the periphery of a claw seat 90, and a detent ring 96 is slidably provided under the claw seat 90 by using an elastic member 95 to support it, and a guide groove 92 and a guide ring 98 that can slide relatively are provided between each hook claw 91 and the detent ring 96, so that when the detent ring 96 is pressed upward, each hook claw 91 can be synchronously driven to open its claw outward, and conversely, after the detent ring 96 is released, it can be supported and reset by the elastic member 95, and drive each hook claw 91 to synchronously close its claw downward to hook the annular component, and finally a screw 99 screwed on the claw seat 90 is used to push the assembly shaft. Although the aforementioned patent solves the problem of synchronous opening and closing of the hook claw, the movement of the hook claw 91 is restricted by the mutual restriction of the guide groove 92 and the guide ring 98 of the detent ring 96, so that the opening and closing angle of the hook claw 91 is limited, and it cannot be used to clamp annular components with larger or smaller outer diameters. In addition, in addition to being pivoted on the claw seat 90, the hook claw 91 is also connected to the guide ring 98 of the detent ring 96, so that the hook claw 91 cannot be arbitrarily replaced. Therefore, the user must prepare pullers of various specifications to meet the operational requirements. Moreover, when the detent ring 96 is pressed upward to drive the hook claw 91 to open, the lower end of the claw seat 85 extends into the operating area of ​​the hook claw 91, which invisibly causes operational interference and shortens the operational space and stroke.

[0004] Another example is the patent application No. 107213503 in Taiwan, China, in which a receiving portion is formed on the outer edge of a claw member pivotally mounted on the main body, and further an elastically movable adjustment mechanism is provided on the main body, and the adjustment mechanism has a plurality of latching portions corresponding to the receiving portion of the claw member, so that when the adjustment mechanism is driven, the claw member can be driven to open or close the claw synchronously through the combination of the latching portion and the receiving portion. However, the abutment portion of the adjustment mechanism needs to extend between the body and the claw member, so that the combined size of the abutment portion and the resisting portion is insufficient, which limits the opening and closing angle of the claw member. At the same time, it cannot withstand the pulling force when pulling the annular member, and even slips. If you want to improve its strength, you need to increase the size of each component, which makes the entire puller bulky and difficult to operate. Moreover, its overall structure is complicated because a plurality of abutment portions need to be locked on the adjustment mechanism, which increases the difficulty of assembly. At the same time, due to the limitation that the abutment portion of the adjustment mechanism needs to be aligned and combined with the abutment portion of the claw member, it is necessary to improve the processing accuracy of its various parts. Otherwise, the contact point between the hook portion of the claw member and the annular member may be skewed, making it impossible for the screw member to act in a straight line on the axis of the assembly shaft, which not only causes the problem of driving force dispersion, but also the phenomenon that the hook portion of the clamp and the annular member slip during operation if you are not careful, seriously affecting the safety of use. Summary of the invention

[0005] In short, how to solve the problems of the above-mentioned existing pullers is indeed a goal and direction for the relevant industry to think about. The inventor has conducted in-depth research on the problems faced by the above-mentioned pullers, and actively sought solutions based on many years of research and development experience in related industries. After continuous efforts in research and trial production, he finally successfully developed a mechanical pulling device to overcome the troubles and inconveniences of the existing ones.

[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, which has an installation chamber inside, a screw hole formed on the inner edge of the installation chamber, and a plurality of pivoting parts are formed on the periphery of the claw seat, and at least one long through hole connected to the installation chamber is formed on the outer wall of each corresponding pivoting part;

[0008] A plurality of hook claw arms can be respectively pivotally mounted on the pivotal portion of the claw seat, and the end edge of the hook claw arm has at least one protruding rafter that can pass through the relatively long through hole and move up and down;

[0009] A claw slide cylinder is elastically movable and arranged in the claw seat installation chamber, and an embedding portion is formed on the outer edge of the claw slide cylinder near the bottom end for the hook arm protrusions passing through the long through hole of the claw seat to be embedded together;

[0010] A screw rod is screwed into the screw hole of the claw seat.

[0011] The present invention further achieves the aforementioned objectives and effects by using the following technical means; such as:

[0012] Each of the pivoting parts of the claw seat is composed of two opposite pivot ears, and a long through hole is formed between the two pivot ears. Each of the hook claw arms is pivoted between the two pivot ears, and each of the hook claw arms has a convex rafter that can pass through the long through hole.

[0013] The upper and lower edges of each long through hole of the claw seat are respectively formed with a closed limit surface and an open limit surface that are inclined and expanded toward the axis, and the convex rafter of each hook claw arm is formed with a closed limit surface and an open limit surface that are inclined and converged toward the axis of the claw seat, so that the strength of the convex rafter can be improved and the swing angle of each hook claw arm can be increased.

[0014] A pivot hole is formed on the pivot ears on both sides of each pivotal part of the claw seat, and a corresponding pivot hole is formed on the pivot part relative to the hook claw arm, which is pivoted by a pivot member, and the pivot member has detachable bolts and nuts for selectively replacing the hook claw arms on the claw seat one by one.

[0015] A pressure plate is fixedly arranged on the outer edge of the top end of the claw seat, and a pressure plate is fixedly arranged on the outer edge of the claw opening slide cylinder, which can facilitate driving the claw opening slide cylinder.

[0016] The claw seat and the pressure plate of the claw opening slide cylinder are respectively formed with a plurality of opposite locking holes, and at least one limiting member is provided for locking to prevent the claw opening slide cylinder from being completely separated from the claw seat.

[0017] The embedding portion of the claw slide tube can be composed of a plurality of through holes of equal height corresponding to the long through holes of the claw seat, which can ensure the strength of the claw slide tube and lengthen the length of the claw arm convex rafter so that the claw arm convex rafter will not break or slip off at will.

[0018] An elastic member is provided between the claw opening slide cylinder and the claw seat, and the elastic member can be a compression spring provided between the claw opening slide cylinder and the claw seat.

[0019] The end of the screw rod corresponding to the hook arm passing through has a separated top cone, and at least one connecting rod sleeve can be selectively inserted between the screw rod and the top cone to meet different disassembly stroke requirements.

[0020] The screw rod can be screwed on the claw slide cylinder and pass through the clamp seat, and the claw slide cylinder is formed with a corresponding screw hole. The screw rod can be used to resist and push the assembly shaft.

[0021] Therefore, the main advantage of the present invention is to provide a puller that can simplify the structure and increase the opening and closing angle of the hook arm, and can be easily operated and quickly complete the disassembly work.

[0022] Furthermore, another major advantage of the present invention is to provide a mechanical pulling device, which can effectively increase the working stroke of disassembly and improve its practicality.

[0023] In addition, another major advantage of the present invention is to provide a mechanical pulling device, which can facilitate users to replace hooks of different specifications, so that the mechanical pulling device can be suitable for different disassembly requirements.

[0024] Furthermore, another major advantage of the present invention is that it provides a mechanical pulling device that allows the hook clamp and the annular member to be coaxial when hooking, thereby ensuring that the clamping can be synchronized and stable to prevent the hook claw arm from slipping during operation, which can effectively improve the safety of the operation.

[0025] 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 skilled in the art can implement them. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a side cross-sectional schematic diagram of the puller of the existing US05,887,328 patent case.

[0027] Figure 2 It is a three-dimensional appearance schematic diagram of the mechanical pulling device of the present invention.

[0028] Figure 3 It is a three-dimensional exploded schematic diagram of the mechanical pulling device of the present invention, for illustrating the state of each component and their relative relationship.

[0029] Figure 4 It is a side cross-sectional schematic diagram of the mechanical pulling device of the present invention, which is used to illustrate its composition and the state of the hook arm when it is closed.

[0030] Figure 5 It is a schematic cross-sectional view of the mechanical pulling device of the present invention in actual use, for illustrating the state when the hook arm is fully opened.

[0031] Figure 6 This is another cross-sectional schematic diagram of the mechanical pulling device of the present invention in actual use, for illustrating the state of the hook arm when closing and clamping the annular member.

[0032] Figure 7 This is another schematic cross-sectional view of the mechanical pulling device of the present invention in actual use, for illustrating the state of the mechanical pulling device when driving the disassembly of the annular component.

[0033] Figure 8 It is a three-dimensional schematic diagram of the mechanical pulling device of the present invention in actual use, for illustrating the state of the serial connection of the pipe sleeve.

[0034] Fig. 9 It is another three-dimensional schematic diagram of the appearance of the mechanical pulling device of the present invention in actual use, for illustrating the state of replacing the hook arm.

[0035] Fig.10 It is a three-dimensional schematic diagram of the appearance of another preferred embodiment of the mechanical pulling device of the present invention, for illustrating the state that it has three hook arms.

[0036] Description of reference numerals: 10-claw seat; 11-installation chamber; 12-screw hole; 15-pivot portion; 16-pivot ear; 17-pivot hole; 18-long through hole; 181-closing limit surface; 182-opening limit surface; 19-pressure plate; 191-locking hole; 20-hook 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 slide; 31-convex retaining edge; 32-embedded portion; 33-through-hole; 34-pressure plate; 341-locking hole; 35-elastic member; 38-limiting member; 40-screw member; 43-operating rod; 44-top cone; 441-embedded portion; 60-connecting rod sleeve; 61-embedded portion; 62-embedded portion; 80-annular member; 85-assembly shaft. DETAILED DESCRIPTION

[0037] The present invention is a mechanical pulling device. In the specific embodiments of the present invention and its components illustrated in the accompanying drawings, all references to front and back, left and right, top and bottom, upper and lower parts, and horizontal and vertical are only used for convenience of description and are not intended to limit the present invention or its components to any position or spatial direction. The dimensions specified in the drawings and the description may be changed according to the design and requirements of the present invention without departing from the scope of the invention.

[0038] The mechanical pulling device of the present invention is as follows Figure 2 , Figure 3 As shown, it is composed of a claw seat 10, at least two hook claw arms 20, a claw opening slide cylinder 30 and a screw member 40, so that the claw opening slide cylinder 30 can drive the hook claw arms 20 on the claw seat 10 to open or close synchronously relative to each other, so as to synchronously clamp an annular member 80 (such as Figure 6 As shown), and the screw member 40 provided on the claw seat 10 is used to push the assembly shaft 85 to move relative to the annular member 80 (as shown Figure 7 shown);

[0039] The detailed structure of the characteristic structure of the present invention is as follows Figure 3 , Figure 4As shown, the claw seat 10 has a through installation chamber 11 formed inside, and a screw hole 12 for the aforementioned screw member 40 to be screwed is formed at the bottom edge of the inner surface of the installation chamber 11 of the claw seat 10, and the claw seat 10 has at least two pivoting parts 15 for pivotally mounting the aforementioned hook arm 20. According to some embodiments, as Fig.10 As shown, the claw seat 10 of the present invention can have three pivoting parts 15 with equal angles for pivotally mounting three hook claw arms 20 . Each of the pivoting parts 15 is composed of two pivot ears 16 that can clamp the hook claw arm 20 relatively, and the two pivot ears 16 are respectively formed with a relative pivot hole 17. Furthermore, the claw seat 10 is respectively formed with at least one long through hole 18 connected to the installation chamber 11 at each pivoting part 15, and the present invention takes a long through hole 18 formed between the two pivot ears 16 as the main embodiment, and the upper and lower edges of each of the long through holes 18 are respectively formed with a closing limit surface 181 and an opening limit surface 182 for limiting the closing angle and opening angle of the hook claw arm 20, and the closing limit surface 181 and the opening limit surface 182 are inclined to expand toward the inside of the claw seat 10, so that the closing angle and opening angle of each of the hook claw arms 20 can be increased without changing the structure. A pressure plate 19 is fixedly provided on the outer edge of the top end of the claw seat 10, and a plurality of locking holes 191 are formed on the pressure plate 19;

[0040] In addition, each hook arm 20 has a hook portion 21 (such as Figure 6 , Figure 7 As shown in FIG. 1 , the hook 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 pivotally mount the hook arm 20 on the pivot portion 15 of 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 hook arms 20, 20A of different specifications (such as Figure 8 As shown in FIG. 1 , each hook arm 20 has at least one protruding rafter 25 formed at the top base thereof which can pass through the long through hole 18 of the claw seat 10. The hook arm 20 of the present invention mainly comprises a protruding rafter 25 corresponding to the long through hole 18 of the two opposite pivot ears 16 of the pivot joint 15, and 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 hook arm 20 can swing in the long through hole 18 of the claw seat 10 by using the protruding rafter 25. The upper and lower edges of the convex rafter 25 of the hook arm 20 are respectively formed with a closing limit surface 251 and an opening limit surface 252, which are used to cooperate 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 hook arm 20. The closing limit surface 181 and the opening limit surface 182 of the convex rafter 25 are inclined to converge toward the free end, which can increase the closing angle and the opening angle of each hook arm 20;

[0041] The claw slide 30 is elastically movable and arranged inside the mounting chamber 11 of the claw seat 10. An elastic member 35 is arranged between the claw slide 30 and the claw seat 10 so that the claw slide 30 can generate an elastic preload for resetting upward. The elastic member 35 can be selected from a compression spring arranged inside or outside the claw slide 30. The elastic member 35 of the present invention is arranged on a convex retaining edge 31 on the inner edge of the claw slide 30 and on a step surface of the screw hole 12 of the claw seat 10. The compression spring between the claws is the main embodiment, so that the elastic member 35 is hidden in the claw slide 30, which can enhance the appearance and prevent accidental exposure to the outside to injure personnel, thereby enhancing the safety of use. The claw slide 30 has an embedded portion 32 formed on the outer edge near the bottom edge, and the embedded portion 32 can be composed of a plurality of through holes 33 of equal height and corresponding to the long through hole 18 of the claw seat 10, a non-through embedded groove (not shown in the figure) or a non-through annular groove (not shown in the figure) ) is formed for the protruding rafters 25 of the hook claw arms 20 to be embedded, so that when the claw opening slide 30 moves up and down, it can synchronously drive each claw opening arm 20 to close inward or open outward with the pivot 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 claw opening slide 30 and lengthen the length of the protruding rafters 25 of the hook claw arm 20, so that the combination relationship between the two is more reliable and stable, so that the protruding rafters of the hook claw arm 20 25 will not break or slip off at will, and a pressure plate 34 is fixedly provided on the outer edge of the top end of the claw slide 30, and a plurality of locking holes 341 are formed on the pressure plate 34, and the locking holes 341, 191 on the claw slide 30 and the pressure plates 34, 19 of the claw seat 10 can be opposite, and each of the locking holes 341, 191 can be a through hole or a screw hole for locking with a limiting member 38, wherein the limiting member 38 can be composed of a bolt, or a bolt and a nut;

[0042] The screw member 40 passes through the interior of the claw slide and is screwed into the screw hole 12 of the claw seat 10. An operating rod 43 can be selectively vertically provided at the top of the screw member 40, which can be used to quickly rotate the screw member 40 to move upward or downward relative to the claw seat 10. In addition, the free end of the screw member 40 has a top cone 44 for abutting against the aforementioned assembly shaft 85. According to some embodiments, the top cone 44 and the screw member 40 can be a butt-jointed separation structure, such as the first Figure 8As shown, it can be used with a typical connecting rod sleeve 60, wherein the screw member 40 can have an embedding portion 401 (which can be an embedding hole or an embedding column), and the top of the top cone 44 has a relatively pluggable embedding portion 441 (which can be an embedding column or an embedding hole), and each end of the connecting rod sleeve 60 can be a relatively pluggable embedding portion 61, 62 with adjacent screw members 40, connecting rod sleeves 60 or top cones 44, so that the length of the screw member 40 can be changed according to actual needs to meet different disassembly stroke requirements. According to some embodiments, the screw member 40 can be screwed on the aforementioned claw slide 30 and pass through the clamp seat 10, wherein the claw slide 30 is formed with a corresponding screw hole (not shown in the figure), and the screw member 40 can also be used to resist and push the assembly shaft 80;

[0043] In this way, by pressing the claw opening slide 30 to elastically displace relative to the claw seat 10, the hook arms 20 on the claw seat 10 can be driven to open and close synchronously to hook the annular component 80, and the screw member 40 on the claw seat 10 can be used to relatively resist and push the assembly shaft 85, thereby forming a mechanical pulling device that can separate the annular component 80 and the assembly shaft 85.

[0044] Through the above structural design, the mechanical pulling device of the present invention is as follows when actually used. Figure 4 As shown, before use, the screw member 40 is withdrawn from the assembly shaft 85, and the claw slide cylinder 30 on the claw seat 10 is pre-forced to move upward by the elastic member 35, so that the claw slide cylinder 30 can drive the convex rafters 25 of each hook claw arm 20 on the claw seat 10 to move upward, so that each hook claw arm 20 is in a downward closed state with the pivot 24 as the axis, and because the convex rafters 25 of each hook claw arm 20 are relatively abutted against the upper edge closing limit surfaces 251 and 181 of the long through hole 18 of the claw seat 10, when each hook claw arm 20 of the present invention is closed to the minimum angle, the claw slide cylinder 30 can be limited to move upward and prevented from being released by the elastic force of the elastic member 35, so the claw slide cylinder 30 of the present invention does not need to be provided with a limit mechanism separately;

[0045] When the annular member 80 on the assembly shaft 85 is to be disassembled, the following steps are performed: Figure 5 , Figure 6 As shown, the claw opening slide cylinder 30 on the claw seat 10 is driven downward (such as the operator manually presses the claw opening slide cylinder 30), so that the claw opening slide cylinder 30 moves downward and the elastic member 35 is simultaneously compressed to generate a restoring preload. When the claw opening slide cylinder 30 moves downward, the protruding rafter 25 of the hook claw arm 20 pivoted on the claw seat 10 can be synchronously driven downward, so that each hook claw arm 20 can be opened upward with the claw seat 10 as the pivot point, as shown in FIG. Figure 5It is shown that when each hook arm 20 of the present invention is opened to the maximum angle, the opening limit surface 182 of the lower edge of the protruding rafter 25 of each hook arm 20 can be abutted against the opening limit surface 182 of the lower edge of the long through hole 18 of the claw seat 10, and then the annular member 80 is placed in the range surrounded by each hook arm 20, and the downward pressure of the claw opening slide 30 is released, as shown in FIG. Figure 6 As shown, the claw slide cylinder 30 can be moved upward and gradually retreated by the restoring pre-force of the elastic member 35, and the claw slide cylinder 30 can drive the protruding rafters 25 of each hook claw arm 20 on the claw seat 10 to move upward synchronously, so that one end of the hook portion 21 of each hook claw arm 20 is closed downward, and the hook portion 21 of each hook claw arm 20 can be synchronously and smoothly hooked on the bottom edge of the annular member 80;

[0046] Afterwards, if Figure 7 As shown, the operating rod 43 is used to screw the screw member 40 downward to push the assembly shaft 85. Since the annular member 80 is hooked by the hook portion 21 of each hook arm 20 of the claw seat 10 from the bottom edge, the assembly shaft 85 is pushed by the screw member 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 and the assembly shaft 85 can be completely separated. Furthermore, when the stroke of the screw member 40 is insufficient, as shown in FIG. Figure 8 As shown, the screw member 40 can be retracted and then used in conjunction with a typical connecting rod sleeve 60 to meet different disassembly stroke requirements.

[0047] In addition, the mechanical pulling device of the present invention can directly replace the hook arm 20 of different specifications as needed, such as Fig. 9 As shown, since at least one limiting member 38 is locked between the relative pressure plates 19, 34 of the claw seat 10 and the claw slide 30, it can prevent the claw slide 30 from being disengaged due to the restoring preload of the elastic member 35. Then, the pivot members 24 (such as bolts and nuts) of the pivotal connection portion 15 of each hook claw arm 20 and the claw seat 10 can be disassembled one by one, the original hook claw arm 20 is removed, and then the convex rafter 25A of the new hook claw arm 20A is sequentially passed through the long through hole 18 of the claw seat 10 and the embedded portion 32 of the claw slide 30 (such as Figure 4 As shown), the new hook arm 20A is pivotally disposed between the two pivot ears 16 of the pivot portion 15 of the claw seat 10 by using the pivot member 24, and the old hook arms 20 of the claw seat 10 are removed one by one and replaced with new hook arms 20A in the aforementioned manner, so that it can be applicable to annular components 80 or assembly shafts 85 of different specifications or types, thereby effectively improving its practicality.

[0048] Through the above-mentioned design and description, the mechanical pulling device of the present invention can drive the plurality of hook claw arms 20 pivoted on the claw seat 10 to synchronously open outward or close inward by driving the claw opening slide 30 on the claw seat 10, so as to synchronously hook the annular member 80, and use the driving screw member 40 to push against and push the assembly shaft 85, so that the annular member 80 can be separated from the assembly shaft 85. The mechanical pulling device of the present invention is not only simple in structure, but also because each of the hook claw arms 20 can move synchronously, it can smoothly hook and remove the annular member 80 without any slipping, and has the effect of being easy to operate, which can greatly improve its practicality and safety. At the same time, the present invention further has the following effects, such as:

[0049] 1. Each hook arm 20 on the claw seat 10 of the present invention drives the convex rafter 25 by the claw opening slide 30 so that it can be opened or closed synchronously, so that there is no other component within the action range of the hook arm 20 except the screw member 40 used to support the assembly shaft 85, and no interference will be caused within the working range. At the same time, the disassembly work stroke can be effectively increased, making the work simpler and more efficient.

[0050] 2. The combined positioning system of the present invention utilizes the convex rafters 25 of each hook claw arm 20 to pass through the long through hole 18 of the claw seat 10 and is combined with the clamping portion 32 of the claw opening slide 30, so that there is no need to set a limiting mechanism for the claw opening slide 30 on the claw seat 10, which can further simplify the structure. When a limiting member 38 is provided between the pressure plates 19 and 34 of the claw seat 10 and the claw opening slide 30, different hook claw arms 20 can be replaced one by one to change the applicable specifications. For the staff, in addition to the effect of easy assembly and replacement, it can also reduce the cost of preparing mechanical pulling devices of different specifications.

[0051] 3. The claw slide 30 of the present invention can utilize the through-hole 33 of the embedded card portion 32 at the same height to synchronously drive each hook arm 20, so that the hook portion 21 of each hook arm 20 can simultaneously and firmly contact and hook with the annular component 80. In addition, the long through hole 18 of the claw seat 10 and the convex rafter 25 of the hook arm 20 have inclined and opposite closing limit surfaces 181, 251 and opening limit surfaces 182, 252, and each hook arm 20 can increase the opening angle and reduce the closing angle, thereby increasing the working range. At the same time, the bearing strength of the convex rafter 25 of the hook arm 20 can be improved, thereby enhancing its driving force, which can be used to disassemble the annular component 80 with stronger bonding force or rust-proof adhesion.

[0052] The above description is only illustrative rather than restrictive of the present invention. 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, but all will fall within the scope of protection of the present invention.

Claims

1. A mechanical pulling device, It is characterized in that Contains: A claw seat, which has an installation chamber inside, a screw hole is formed on the inner edge of the installation chamber, and the claw seat has a plurality of pivoting parts on the periphery, and the claw seat has at least one long through hole connected to the installation chamber formed on the outer wall of each corresponding pivoting part; the upper and lower edges of each of the long through holes of the claw seat are respectively formed with a closed limit surface and an open limit surface that are inclined and expanded toward the axis; A plurality of hook claw arms are respectively pivotally mounted on the pivotal parts of the claw seat, and the end edge of the hook claw arm has at least one convex rafter that can pass through the relatively long through hole and move up and down, and the convex rafter of each hook claw arm is formed with a closed limit surface and an open limit surface that are inclined and converged toward the axis of the claw seat; A claw slide cylinder is elastically and movably arranged in the claw seat installation chamber, and an embedding portion is formed on the outer edge of the claw slide cylinder adjacent to the bottom end for the hook arm protrusions passing through the long through hole of the claw seat to be embedded together; A screw member, which is screwed into the screw hole of the claw seat; Among them, a pressure plate is fixedly provided on the outer edge of the top of the claw seat, and a pressure plate is fixedly provided on the outer edge of the claw opening slide cylinder, which is used to drive the claw opening slide cylinder; a plurality of opposite locking holes are formed on the pressure plates of the claw seat and the claw opening slide cylinder, respectively, and at least one limiting member is provided for locking to prevent the claw opening slide cylinder from being completely separated from the claw seat.

2. The mechanical pulling device according to claim 1, Features: Each of the pivoting parts of the claw seat is composed of two opposite pivot ears, and the claw seat is formed with a long through hole between the two pivot ears. Each of the hook claw arms is pivoted between the two pivot ears, and each of the hook claw arms has a convex rafter that can pass through the long through hole.

3. The mechanical pulling device according to claim 1, Features: A pivot hole is formed on the pivot ears on both sides of each pivotal part of the claw seat, and a corresponding pivot hole is formed on the pivot part of the hook claw arm, so that a detachable pivot member can be used to pivot and selectively replace the hook claw arms on the claw seat one by one.

4. The mechanical pulling device according to claim 1, Features: The embedding portion of the claw slide cylinder is composed of a plurality of through holes with the same height and corresponding to the long through holes of the claw seat.

5. The mechanical pulling device according to claim 1, Features: An elastic member is arranged between the claw opening slide cylinder and the claw seat, so that the claw opening slide cylinder can drive the hook claw arm to generate a downward closing pre-force.

6. The mechanical pulling device according to claim 5, Features: The elastic member is a compression spring arranged between the claw opening slide cylinder and the claw seat.

7. The mechanical pulling device according to claim 1, Features: One end of the screw rod component corresponding to the hook claw arm passing through has a separated top cone portion, and at least one connecting rod sleeve can be selectively inserted between the screw rod component and the top cone portion.

8. A mechanical pulling device, It is characterized in that Contains: A claw seat, which has an installation chamber inside, a plurality of pivoting parts on the periphery of the claw seat, and at least one long through hole connected to the installation chamber is formed on the outer wall of each corresponding pivoting part of the claw seat; the upper and lower edges of each of the long through holes of the claw seat are respectively formed with a closed limit surface and an open limit surface that are inclined and expanded toward the axis; A plurality of hook claw arms are respectively pivotally mounted on the pivotal parts of the claw seat, and the end edge of the hook claw arm has at least one convex rafter that can pass through the relatively long through hole and move up and down, and the convex rafter of each hook claw arm is formed with a closed limit surface and an open limit surface that are inclined and converged toward the axis of the claw seat; A claw slide cylinder is elastically movably arranged in the claw seat installation chamber, a screw hole is formed on the claw slide cylinder, and an embedding portion is formed on the outer edge of the claw slide cylinder adjacent to the bottom end, for the hook arm protrusions passing through the long through hole of the claw seat to be embedded together; A screw rod, which is screwed into the screw connection hole of the claw slide cylinder, and the screw rod passes through the claw seat installation chamber; Among them, a pressure plate is fixedly provided on the outer edge of the top of the claw seat, and a pressure plate is fixedly provided on the outer edge of the claw opening slide cylinder, which is used to drive the claw opening slide cylinder; a plurality of opposite locking holes are formed on the pressure plates of the claw seat and the claw opening slide cylinder, respectively, and at least one limiting member is provided for locking to prevent the claw opening slide cylinder from being completely separated from the claw seat.

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