Power hydraulic puller

Abstract

The present invention provides a power type hydraulic puller, which is provided with a relatively movable and elastically resettable open claw slide in a claw seat, and at least two hook claw arms are pivotally provided on the claw seat, and each of the hook claw arms has a convex rafter passing through the claw seat and engaged with the open claw slide. A composite power group is provided in the claw seat, which can selectively use a linkage to drive the open claw slide, and the composite power group can selectively drive a push piece screwed on its axis. In this way, the open claw slide can be driven by the composite power group, so that the open claw slide can synchronously drive each of the hook claw arms to swing between an open claw position and a closed claw position relative to the clamp seat, which can not only simplify the structure, but also facilitate operation and quickly remove an annular component from the device, and it can stably hook the annular component without any slipping, 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 powered hydraulic puller, which can remove annular components such as bearings from their mounting shafts, and has not only a simple structure but also a variety of working modes, a long pulling stroke, and is easy to operate and quick to disassemble, and can also enhance the safety and practicality of the operation. Background Art

[0002] Various circular components such as discs, bearings, gears, pulleys, etc. are mainly fixed on an assembly shaft to produce linkage. At present, the tools used to remove various circular components from the assembly shaft are mainly pullers. The pullers actually used can be divided into two categories according to the power type: mechanical pullers and hydraulic pullers. The main structure is that a claw seat is pivoted on the outer edge with a plurality of hooks for hooking the circular component, and a power element (such as a screw or a hydraulic cylinder) is set in the center of the wheel seat for telescopically pushing the top of the assembly shaft. By operating the driving force element to extend and push the assembly shaft, the hook is used to pull the circular component to move relatively, so as to remove the circular component.

[0003] However, in the prior art, no matter what kind of power type the puller has, there are some problems. First, there is a contradiction between labor saving and efficient work. First, although the mechanical puller has a longer working stroke, it is laborious and troublesome to manually screw in and out the screw, which directly affects the efficiency and progress of its disassembly work. As for the hydraulic puller, the working stroke is limited by the hydraulic cylinder lift. When the disassembly stroke of the annular component is long, it needs to be retracted several times to add a connecting rod and then re-driven, which affects the efficiency and convenience of disassembly of the annular component.

[0004] Secondly, the hooks of some traditional pullers cannot be opened and closed synchronously, so the opening and closing action of the hooks requires the user to individually move them to open or close, and after clamping the annular component, the hooks still need to be fixed separately to avoid displacement of the clamping claws, which is extremely inconvenient in operation. For this reason, the US patent US05,887,328 provides a solution, which is to use an elastic member under the claw seat to support a relatively slidable detent ring, and the detent ring is connected by a guide groove for the hooks to pass through or a guide groove on the hooks, so that when the detent ring is pressed upward, the hooks can be synchronously driven to open outward, and after being released, the hooks can be reset to drive the hooks to close inward synchronously and hook the annular component. As for the Chinese invention patent publication No. CN108262714A, an adjusting screw barrel is provided outside the main screw barrel of the claw seat, a pull plate is screwed on the adjusting screw barrel, and a pull rod is pivotally provided between the pull plate and each hook claw. When the adjusting screw barrel is rotated, the pull plate can be moved to utilize the pull rod to drive each hook claw to open and close synchronously. Although the aforementioned patent case solves the problem of synchronous opening and closing of the hooks and makes the operation simpler, its structure tends to be complicated due to the design of the driving ring guide groove, the hook guide groove, or the adjustment screw and the pull rod, which increases the difficulty and cost of manufacturing and assembly. At the same time, such a structure also limits the opening angle of the hook. In addition, it is impossible to replace the hook, which reduces its applicable range (such as the diameter of the annular component, the length of the hook or the shape of the hook portion of the hook, etc.), resulting in the need to prepare a variety of pullers of different specifications for operation, which also increases the difficulty and cost of operation. Moreover, as in the US patent case US05,887,328, when the driving ring is pressed on to drive the hook to open, the lower end of the claw seat extends into the operating area of ​​the hook, and the invisible interference also shortens the working space.

[0005] Later, some industry insiders developed patent applications such as Taiwan, China, No. 107213503, in which a plurality of pivoting parts are formed on the outside of a main body on which a screw member is screwed, and a claw member is pivoted by each pivoting part, and a receiving part is formed on the outer edge of the corresponding pivoting part of the claw member, and an elastically movable adjustment mechanism is provided on the main body, and the adjustment mechanism has a plurality of abutting parts corresponding to the abutting parts of the aforementioned claw member, so that when the adjustment mechanism is driven, the claw member can be synchronously opened or closed through the combination of the abutting part and the abutting part. Although such a design makes the claw member no longer restricted by the aforementioned pull rod or guide groove, because the abutting part of the adjustment mechanism needs to extend into the pivoting part of the main body and combine with the abutting part of the claw member, it The smaller the engagement point, the less effective it is to increase the opening angle of the claw and the worse the structural strength, which may make it impossible to withstand the pulling force when pulling the annular member. If one wishes to increase its strength, one needs to increase the size of each component, making the entire puller bulky and difficult to operate. At the same time, the adjustment mechanism's abutment portion must be aligned with the claw's abutment portion, so the machining accuracy of each part needs to be improved. Otherwise, the contact point between the claw's hook and the annular member may be skewed, making it impossible for the screw 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 hook of the clamp and the annular member may slip during operation if one is not careful, seriously affecting the safety of use.

[0006] In other words, in view of the problems existing in the above-mentioned existing pulling device technology, 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 think about and break through, which is also what the present invention intends to explore. Summary of the invention

[0007] Therefore, the inventor has conducted in-depth research on the above-mentioned problems and actively sought solutions based on his many years of research and development experience in related industries. After continuous efforts in research and trial production, he finally successfully developed a power-type hydraulic puller to overcome the troubles and inconveniences caused by the contradiction between the labor saving and efficiency of the existing mechanical and hydraulic pullers.

[0008] Based on this, the present invention mainly achieves the above-mentioned purpose and its effect through the following technical means, which include:

[0009] A claw seat, the periphery of which has at least two pivoting parts, and the outer wall of the claw seat is formed with at least one long through hole corresponding to each pivoting part;

[0010] At least two hook claw arms, each of which is formed with a pivot portion that can be pivotally connected to the pivot portion of the claw seat, and each of the hook claw arms is formed with at least one protruding rafter at one end edge, wherein each protruding rafter of each hook claw arm can pass through the long through hole of the corresponding pivot portion of the claw seat, so that each hook claw arm can swing between an open claw position and a closed claw position relative to the claw seat;

[0011] An opening claw slide cylinder is elastically slidably disposed in the claw seat, and an embedding portion is formed on the outer edge of the opening claw slide cylinder near the bottom end for embedding the protruding rafters of the at least two hook claw arms, so that the opening claw slide cylinder can synchronously drive each of the hook claw arms to rotate;

[0012] A compound power group is locked inside the claw seat. The compound power group selectively utilizes a linkage to drive the claw slide cylinder, and the compound power group can selectively drive a push piece screwed on its axis.

[0013] The present invention further achieves the aforementioned objectives and effects by using the following technical means; such as:

[0014] Each of the pivoting parts of the claw seat is composed of two opposite pivot ears, and a long through hole is formed on the wall of the claw seat between the two pivot ears. Each of the hook claw arms is pivoted between the two pivot ears by a pivot part, and each of the hook claw arms has a convex rafter that can pass through the long through hole.

[0015] 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.

[0016] 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 for pivoting using a pivot member, and the pivot member is a detachable bolt and nut for selectively replacing the hook claw arms on the claw seat one by one.

[0017] 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 tube, and a plurality of opposite locking holes are formed on the two pressure plates respectively, and at least one limiting member is provided for locking to prevent the claw opening slide tube from being completely separated from the claw seat.

[0018] The embedded part 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 hook claw arm protrusion so that the hook claw arm protrusion will not break or slip off at will.

[0019] 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 inner edge of the claw opening slide cylinder and the inner bottom edge of the claw seat, so that the elastic member is hidden in the claw opening slide cylinder.

[0020] The composite power group is composed of a hollow hydraulic cylinder fixed on the claw seat, and the axis of the hollow hydraulic cylinder has a hollow extension rod for a push piece to be screwed, and a linkage piece is arranged on the push piece for selectively pushing against the claw opening slide on the claw seat.

[0021] The linkage member comprises a linkage slide which is arranged outside the hollow hydraulic cylinder and abuts against the claw opening slide. A spacing is maintained between the inner top surface of the linkage slide and the top end of the hollow hydraulic cylinder so that the claw opening slide can drive each hook claw arm to close and open. The push member can pass through the top end of the linkage slide. The linkage member is provided with a limit member on the push member which can selectively position the linkage slide and the push member.

[0022] The push piece of the composite power group has a top cone portion for abutting against the assembly shaft at one end corresponding to the hook arm. The top cone portion and the push piece are separate structures, and the push piece and the top cone portion can selectively be plugged with at least one connecting rod sleeve to meet different disassembly stroke requirements.

[0023] Therefore, the main advantage of the present invention is to provide a powered hydraulic puller that can quickly and easily perform disassembly work without causing interference, and can effectively increase the disassembly work stroke.

[0024] Furthermore, another major advantage of the present invention is that it provides a power type hydraulic puller, which can effectively simplify the structure, make it easy to assemble, and reduce the manufacturing and material preparation costs of the puller.

[0025] Another major advantage of the present invention is that it provides a power type hydraulic puller which can increase the opening angle of the hook and decrease the closing angle of the hook without increasing the size, thereby increasing the size range of the annular component suitable for disassembly.

[0026] In addition, another major advantage of the present invention is that it provides a powered hydraulic puller that can facilitate users to replace hooks of different specifications, so that the puller can be adapted to different disassembly requirements.

[0027] Furthermore, another major advantage of the present invention is that it provides a powered hydraulic puller that allows the puller and the assembly shaft to maintain the same axis when the hook clip and the annular member are hooked, thereby ensuring smooth movement and avoiding the problem of slipping during operation, thereby effectively improving the safety of the pulling operation.

[0028] 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

[0029] Figure 1 It is a three-dimensional appearance schematic diagram of a preferred embodiment of the power type hydraulic puller of the present invention.

[0030] Figure 2It is a three-dimensional exploded schematic diagram of a preferred embodiment of the power type hydraulic puller of the present invention, for illustrating the state of each component and their relative relationship.

[0031] Figure 3 The figure is a side cross-sectional schematic diagram of the power type oil pressure puller of the present invention after being assembled, for explaining its composition and the state of the hook arm when it is closed.

[0032] Figure 4A The present invention is a three-dimensional schematic diagram of the appearance of the power type hydraulic puller in actual use, for illustrating the state of the power type hydraulic puller in hanging use.

[0033] Figure 4B The figure is a three-dimensional schematic diagram of the appearance of the power type hydraulic puller of the present invention when it is actually used, for explaining another use state of the power type hydraulic puller utilizing hanging.

[0034] Figure 5 The figure is a cross-sectional view of the action of the power type hydraulic puller of the present invention in actual use, for explaining the state when the hook arm is fully opened.

[0035] Figure 6 This is another schematic cross-sectional view of the power type hydraulic puller of the present invention in actual use, for illustrating the state of the hook arm when closing and clamping the annular member.

[0036] Figure 7 This is another schematic cross-sectional view of the power type hydraulic puller of the present invention in actual use, for illustrating the state of the power type hydraulic puller when driving to remove the annular member.

[0037] Figure 8 It is a three-dimensional appearance schematic diagram of another actual use state of the power type hydraulic puller of the present invention, for illustrating the state of replacing the hook arm.

[0038] Fig. 9 This is a three-dimensional schematic diagram of the appearance of the power type hydraulic puller of the present invention in another actual use state, for illustrating the state of the serial connection of the connecting tube.

[0039] Fig.10 It is a three-dimensional schematic diagram of the appearance of another preferred embodiment of the power type hydraulic puller of the present invention, for illustrating the state of the three-claw hook arm.

[0040] Description of the accompanying drawings: 10-claw seat; 11-installation chamber; 12-fixed portion; 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 cylinder; 31-convex blocking edge; 32-embedded portion; 3 3-through-hole; 34-pressure plate; 341-locking hole; 35-elastic member; 38-limiting member; 40-compound power group; 41-hollow hydraulic cylinder; 410-locking part; 42-hollow extension tube; 420-inner threaded member; 43-thrust member; 430-buckle part; 431-top cone part; 432-buckle part; 45-linking member; 46-linking slide; 47-limiting member; 60-connecting rod sleeve; 61-buckle part; 62-buckle part; 80-ring member; 90-assembly shaft. DETAILED DESCRIPTION

[0041] The present invention is a power type hydraulic puller. 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 do not limit the present invention, nor limit its components to any position or spatial direction. The dimensions specified in the drawings and the description can be changed according to the design and requirements of the present invention without departing from the scope of the patent application of the present invention.

[0042] The main components of the power type hydraulic puller of the present invention are as follows: Figure 1 , Figure 2 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 compound power group 40, so that the compound power group 40 can drive the claw arms 20 on the claw seat 10 to selectively and synchronously open or close relative to each other through the claw opening slide cylinder 30, so as to remove an annular member 80 from an assembly shaft 90;

[0043] The detailed structure of the characteristic structure of the present invention is as follows Figure 2 , Figure 3 As shown, the claw seat 10 is a cylindrical body, and the claw seat 10 can be selected from a circular cylindrical body, and a through installation chamber 11 is formed inside the claw seat 10, and a fixing portion 12 with a smaller diameter is formed at the bottom of the inner edge of the installation chamber 11 of the claw seat 10. The fixing portion 12 can be selected from an inner screw hole for fixing the aforementioned composite power group 40, and the periphery of the claw seat 10 has at least two pivoting portions 15 for pivoting the hook claw arm 20. The claw seat 10 of the present invention can have two hook claw arms 20 with equal angles (such as Figure 1 , Figure 2 As shown), three hook arms 20 (as Fig.10 As shown in the figure, or the number of the pivoting parts 15 that can be shared by two hook claw arms 20 and three hook claw arms 20 is determined, and each of the pivoting parts 15 is composed of two opposite pivot ears 16, and the two pivot ears 16 are respectively formed with a relative pivot hole 17, so that the pivoting part 15 can use the two pivot ears 16 to relatively clamp the aforementioned hook claw arm 20, and the claw seat 10 is respectively formed with at least one long through hole 18 at each pivoting part 15, and each of the long through holes 18 is respectively connected to the outside of the claw seat 10 and the installation chamber 11, and the present invention is formed on the wall surface between the two pivot ears 16 of the pivoting part 15 of the claw seat 10 A long through hole 18 is 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 hook claw arm 20 can be increased without changing the structure. A pressure plate 19 is fixedly provided on the outer edge of the top of the claw seat 10, and the fixing can be screwed, welded or bonded, and a plurality of lock holes 191 are formed on the pressure plate 19;

[0044] The hook arm 20 can be in the shape of a long arm or a short arm, and the bottom end of the hook arm 20 has a hook portion 21, wherein the hook portion 21 of the hook arm 20 can be an inward positive claw or an inward and outward reverse claw, and the hook arm 20 is formed with a pivot portion 22 near the top end, and the pivot portion 22 has a pivot hole 23 corresponding to the pivot hole 17 of the claw seat 10, so that a detachable pivot member 24 can be passed through the relative pivot holes 17, 23, and the hook arm 20 is pivotally arranged 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 the hook arm 20 (such as Figure 8 As shown), each hook arm 20 has a convex rafter 25 formed at the top base thereof which can pass through the long through hole 18 of the claw seat 10, and the upper and lower widths of the convex rafter 25 are smaller than the upper and lower widths of the long through hole 18, and each convex rafter 25 has a closing limit surface 251 and an opening limit surface 252 formed at the upper and lower edges thereof, respectively, 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 hook arm 20, and the closing limit surface 181 and the opening limit surface 182 of the convex rafter 25 are inclined to converge toward the free end, so that the closing angle and the opening angle of each hook arm 20 can be increased without changing the structure;

[0045] The claw slide 30 is elastically movable and arranged inside the mounting chamber 11 of the claw seat 10, and the inner wall of the claw slide 30 is formed with a convex retaining edge 31, and the outer edge of the claw slide 30 is formed with an inserting portion 32 adjacent to the bottom edge, and the inserting 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 inserting groove or a non-through annular groove, for the convex rafters 25 of the hook claw arm 20 to be embedded, so that the claw slide 30 is upward or downward. When the hook arm 20 moves downward, it can synchronously drive the hook arm 20 to close inward or open outward with the pivot 22 as the center. The embedded card 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 open claw slide 30 and lengthen the length of the hook arm 20 convex rafter 25, so that the combination of the two is more stable, so that the hook arm 20 convex rafter 25 will not break or slip off at will. A pressure plate 34 is fixed on the outer edge of the top of the open claw slide 30, and the fixing can be screwed, welded or bonded, and the pressure plate 34 is fixed to the outer edge of the top of the open claw slide 30. The plate 34 is formed with a plurality of locking holes 341 for selectively locking at least one lifting ring 36 so that it can be hung (such as a crane) for use, and the locking holes 341 and the locking holes 191 on the pressure plates 34 and 19 of the claw slide 30 and the claw seat 10 can be opposite to each other, and each of the locking holes 341 and 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, and an elastic member is provided between the claw slide 30 and the claw seat 10. The elastic member 35 enables the claw slide 30 to generate an upward reset pre-force, so as to drive each hook arm 20 to automatically close inward after opening outward. The elastic member 35 can be selected from a compression spring arranged inside or outside the claw slide 30. In the present invention, the elastic member 35 is arranged between the convex retaining edge 31 of the claw slide 30 and the step surface of the inner bottom edge of the claw seat 10, so that the elastic member 35 is hidden in the claw slide 30, which can improve the appearance and prevent exposure to accidentally pinch people, thereby improving the safety of use.

[0046] As for the composite power group 40, it is arranged in the claw seat 10 and the claw opening slide 30 to drive the claw opening slide 30 to move relative to the claw seat 10 and generate a force to disassemble the annular member 80. The composite power group 40 is composed of a hollow hydraulic cylinder 41, a push member 43 and a linkage 45, wherein the hollow hydraulic cylinder 41 has a single-acting hollow extension tube 42 (the hollow hydraulic cylinder 41 can be selected from a hollow hydraulic cylinder such as SPX model PH202), which can be connected to an external power source such as an external manual pump, an electric pump, a pneumatic pump, etc. to drive the hollow extension tube 42 to selectively extend. , and the push piece 43 can be an extension tube of the hollow hydraulic cylinder 41 or a long screw, and the push piece 43 of the present invention is mainly implemented with a long screw, and the bottom end of the outer edge of the hollow hydraulic cylinder 41 has a locking portion 410 that can be relatively locked to the fixed portion 12 of the claw slide 30, so that the hollow hydraulic cylinder 41 can be locked in the installation chamber 11 of the claw seat 10 after passing through the claw slide 30, and the bottom end of the inner part of the hollow extension tube 42 has an internal threaded member 420, so that the push piece 43 can be inserted into the hollow extension tube 42 of the hollow hydraulic cylinder 41 and then screwed, so that the long screw-shaped push piece 43 can be moved up and down by screwing action The end of the push member 43 corresponding to the hook arm 20 passing through has a top cone 431 for resisting the assembly shaft 90. The top cone 431 can be an integral structure with the push member 43 or a separate structure connected to the push member 43. The linkage 45 is arranged between the push member 43 and the aforementioned claw opening slide 30, so that it drives the claw opening slide 30 to move between an upward closed claw position and a downward open claw position, so that the push member 43 can drive the claw opening slide 30 to move. The linkage 45 has a set of linkage slides 46 arranged outside the hollow hydraulic cylinder 41 and opening downward. The inner top surface of the linkage slide 46 is connected to the middle The top of the hollow hydraulic cylinder 41 maintains a spacing that allows the claw opening slide 30 to drive each hook arm 20 to close and open, and the push piece 43 can pass through the top of the linkage slide 46, and the hydraulic inlet of the hollow hydraulic cylinder 41 can pass through the linkage slide 46 and move relatively, and the bottom end of the linkage slide 46 can be fixed on the top surface of the convex retaining edge 31 of the aforementioned claw opening slide 30, and the linkage 45 is provided with a limiter 47 on the push piece 43 that can selectively position the linkage slide 46 and the push piece 43, and the limiter 47 can be a screw sleeve screwed on the long screw-shaped push piece 43;

[0047] In this way, the claw opening slide cylinder 30 can be driven by the composite power unit 40, and the claw opening slide cylinder 30 drives each hook arm 20 to open outward or close inward synchronously, thereby forming a power type hydraulic puller.

[0048] As for the actual driving of the power type hydraulic puller of the present invention, it is as follows Figure 4A , Figure 4BAs shown, in operation, it can be used for hanging the overhead travelling crane on the pressure plate 34 of the claw slide 30 (at least one lifting ring or direct hook can be used). Before use, the hollow hydraulic cylinder 41 of the composite power unit 40 is in a depressurized state, such as Figure 3 As shown, the hollow extension tube 42 of the hollow hydraulic cylinder 41 is retracted to its starting point, and the linkage slide 46 of the compound power group 40 is restored to the closed claw position by the elastic member 35 due to the pre-force of the claw opening slide 30, and the linkage slide 46 can abut against the limit member 47 on the push member 43, so that the claw opening slide 30 on the claw seat 10 can drive the convex rafter 25 of each hook claw arm 20 upward, so that one end of the hook portion 21 of each hook claw arm 20 on the claw seat 10 is in a closed state with the pivot 24 as the axis, and because the convex rafter 25 of each hook claw arm 20 is relatively abutted against the upper edge closed limit surfaces 251, 181 of the long through hole 18 of the claw seat 10, Figure 3 It is shown that when the hook 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;

[0049] When the annular member 80 on the assembly shaft 90 is to be disassembled, Figure 5 As shown, high-pressure liquid is injected into the hollow hydraulic cylinder 41 through an external power source to make the hollow extension tube 42 extend toward one end of the hook claw arm 20. Since the push member 43 is screwed on the hollow extension tube 42, a linkage is generated, so that the limit member 47 on the push member 43 can push the linkage slide 46 to move downward, drive the claw opening slide 30 downward, and synchronously compress the elastic member 35 to generate a restoring pre-force. When the claw opening slide 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 one end of the hook portion 21 of each hook claw arm 20 can be opened outward to a desired angle with the pivot 24 pivotally connected to the claw seat 10 as the axis. Figure 5 It 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 abut against the opening limit surface 182 of the lower edge of the long through hole 18 of the claw seat 10;

[0050] Then, if Figure 6 As shown, the annular member 80 on the assembly shaft 90 is placed within the range surrounded by all the hook arms 20 of the puller, and the pressure of the hollow hydraulic cylinder 41 of the composite power group 40 is released, so that the hollow extension tube 42 can drive the push member 43 to retract, and at the same time, the claw opening slide 30 can be moved upward and gradually retracted under the restoring preload of the elastic member 35, and the claw opening slide 30 can drive the convex rafters 25 of each hook arm 20 on the claw seat 10 to move upward synchronously, so that one end of the hook portion 21 of each hook arm 20 is closed downward, and the hook portion 21 of each hook arm 20 can be synchronously and smoothly hooked on the bottom edge of the annular member 80;

[0051] Finally, when performing the disassembly action, the system Figure 7 As shown, the limit member 47 on the push member 43 is screwed back beyond the disassembly stroke, and the push member 43 is rotated so that its top cone 431 can abut the top end of the assembly shaft 90, and then the hollow hydraulic cylinder 41 of the composite power group 40 is driven again by an external power source, so that the hollow extension tube 42 in the hollow hydraulic cylinder 41 can drive the push member 43 to be gradually extended. Since the annular component 80 is hooked by the hook portion 21 of each hook claw arm 20 of the claw seat 10 from the bottom edge, the assembly shaft 90 is pushed by the push member 43 and generates relative movement with the annular component 80, so that the assembly shaft 90 can be gradually separated from the combination relationship with the annular component 80, and finally the annular component 80 can be completely separated from the assembly shaft 90.

[0052] The power puller of the present invention can directly replace the hook arms 20 of different specifications as needed. Figure 8 As shown, since at least one limiting member 38 is locked between the relative pressure plates 19 and 34 of the claw seat 10 and the claw opening slide 30, it is possible to prevent the claw opening slide 30 from being disengaged due to the restoring preload of the elastic member 35. The pivot members 24 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 opening slide 30 (as shown in FIG. Figure 3 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 are removed one by one and replaced with new hook arms 20A in the aforementioned manner, so that it can be applied to annular components 80 or assembly shafts 90 of different specifications or types, thereby effectively improving its practicality.

[0053] Furthermore, if Fig. 9 As shown, when the length of the push piece 43 is not enough to support the top end of the assembly shaft 90 or the distance is too long, it can be used in conjunction with a typical connecting rod sleeve 60, wherein the top cone 431 at the bottom end of the push piece 43 is a separate structure, the push piece 43 can have a buckle portion 430 (which can be an embedded hole or an embedded column), and the top of the top cone portion 431 has a buckle portion 432 (which can be an embedded column or an embedded hole) that can be relatively plugged in, and the two ends of each connecting rod sleeve 60 can be buckle portions 61, 62 that can be relatively plugged in with adjacent push pieces 43, connecting rod sleeves 60 or top cone portions 431, so that the length of the push piece 43 can be changed according to actual needs to meet different disassembly stroke requirements.

[0054] Another embodiment of the present invention is as follows Fig.10As shown, the claw seat 10 has three equiangularly arranged pivotal portions 15 for assembling three hook claw arms 20 so that they can be firmly hooked to the bottom edge of the annular component 80 in a three-point configuration without causing the contact point between the hook portion 21 of the hook claw arm 20 and the annular component 80 to be skewed, so that the push member 43 can act linearly on the axis of the assembly shaft 90, which not only does not cause the problem of power dispersion, but also can prevent the hook portion 21 of the hook claw arm 20 and the annular component 80 from slipping during operation, thereby improving the safety of the operation.

[0055] Through the above-mentioned design and description, the power type hydraulic puller of the present invention can use the composite power group 40 to drive the claw slide 30 on the claw seat 10 to elastically displace, thereby driving the plurality of hook claw arms 20 pivoted on the claw seat 10 to synchronously open outward or close inward, so that the plurality of hook claw arms 20 can selectively and synchronously hook the annular member 80, and the composite power group 40 can drive the push member 43 to push against the assembly shaft 90, thereby separating the annular member 80 from the assembly shaft 90. Not only is the structure simple, but also because each of the hook claw arms 20 can move synchronously, it can smoothly hook and remove the annular member 80 without slipping, greatly improving its practicality and safety. At the same time, the present invention further has the following effects, such as:

[0056] 1. The hollow hydraulic cylinder 41 of the composite power group 40 of the present invention is locked on the bottom surface of the claw seat 10, and the claw opening slide 30 that drives the hook claw arm 20 to open and close the claw moves on the upper part of the claw seat 10. In addition, each hook claw arm 20 is driven by the claw opening slide 30 to drive the convex rafter 25 synchronously, without the need for many connecting rods to drive as in the conventional method. Not only is the overall structure simplified, but also there are no components within the action range of the hook claw arm 20 opening and closing the claw action except for the push piece 43 used to support the assembly shaft 90, and no interference within the working range is caused. At the same time, the full stroke of the hollow hydraulic cylinder 41 can be used for operation, which can effectively increase the disassembly work stroke, making the work simpler and more efficient.

[0057] 2. As mentioned above, since the overall combination 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 embedded clamping portion 32 of the claw opening slide 30, it can be matched with the limiting member 38 between the pressure plates 19 and 34 of the claw seat 10 and the claw opening slide 30, and different hook claw arms 20 can be replaced one by one, making it easy to assemble, and only the hook claw arm 20 needs to be replaced to change the applicable specifications, which can reduce the cost of preparing pullers of different specifications for the staff and improve its practicality.

[0058] 3. At the same time, the claw slide 30 of the present invention can use the through-hole 33 of the embedded card part 32 at the same height to synchronously drive each hook arm 20, so that the hook part 21 of each hook arm 20 can contact and hook the annular component 80 at the same time and firmly. 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.

[0059] 4. When the external power source of the hollow hydraulic cylinder 41 connected to the composite power unit 40 of the present invention is damaged, the staff can still drive the limit member 47 such as the screw sleeve on the push member 43 by hand tools to drive the open claw slide 30 to make the hook arm 20 open the claw, or close the claw to clamp the annular member 80. After the hook arm 20 clamps the annular member 80, the push member 43 can be directly screwed to push against the assembly shaft 90 of the annular member 80, which can be manually operated.

[0060] 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 powered hydraulic puller, characterized in that: Contains: A claw seat, the periphery of which has at least two pivoting parts, and the outer wall of the claw seat is formed with at least one long through hole corresponding to each pivoting part; At least two hook claw arms, each of which is formed with a pivot portion that can be pivotally connected to the pivot portion of the claw seat, and at least one protruding rafter is formed on one end edge of each hook claw arm, and each protruding rafter of each hook claw arm can pass through the long through hole of the corresponding pivot portion of the claw seat, so that each hook claw arm can swing between an open claw position and a closed claw position relative to the claw seat; An opening claw slide cylinder is elastically slidably disposed in the claw seat, and an embedding portion is formed on the outer edge of the opening claw slide cylinder near the bottom end for embedding the protruding rafters of the at least two hook claw arms, so that the opening claw slide cylinder can synchronously drive each of the hook claw arms to rotate; A compound power group, whose lock is arranged inside the claw seat, the compound power group selectively uses a linkage to drive the claw opening slide cylinder, and the compound power group can selectively drive a push piece arranged on its axis; wherein, the compound power group includes a hollow hydraulic cylinder fixed to the claw seat, the axis of the hollow hydraulic cylinder has a hollow extension rod for the push piece to be arranged, and the linkage is arranged on the push piece for selectively pushing the claw opening slide cylinder on the claw seat.

2. The power type hydraulic puller according to claim 1, characterized in that: Each of the pivoting parts of the claw seat is composed of two opposite pivot ears, the long through hole is formed on the wall of the claw seat between the two pivot ears, each of the hook claw arms is pivoted between the two pivot ears by a pivot part, and each of the hook claw arms has a convex rafter that can pass through the long through hole.

3. The power type hydraulic puller according to claim 2, characterized in that: 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 as to improve the strength of the convex rafter and increase the swing angle of each hook claw arm.

4. The power type hydraulic puller according to claim 2, characterized in that: 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 for pivoting using a detachable pivot member, and the pivot member is a detachable bolt and nut for selectively replacing the hook claw arms on the claw seat one by one.

5. The power type hydraulic puller according to claim 1 or 4, characterized in that: 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 tube. A plurality of opposite locking holes are formed on the two pressure plates respectively, and at least one limiting member is provided for locking to prevent the claw opening slide tube from being completely separated from the claw seat.

6. The power type hydraulic puller according to claim 1, characterized in that: The embedded part is composed of a plurality of through holes of equal height corresponding to the long through holes of the claw seat, so as to ensure the strength of the claw slide tube and lengthen the length of the hook claw arm convex rafter so that the hook claw arm convex rafter will not break or slip off at will.

7. The power type hydraulic puller according to claim 1, characterized in that: 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.

8. The power type hydraulic puller according to claim 7, characterized in that: The elastic member is a compression spring arranged between the claw opening slide cylinder and the claw seat.

9. The power type hydraulic puller according to claim 1, characterized in that: The push piece of the composite power group is a long screw.

10. The power type hydraulic puller according to claim 1, characterized in that: The linkage member comprises a linkage slide which is arranged outside the hollow hydraulic cylinder and abuts against the claw opening slide. A spacing is maintained between the inner top surface of the linkage slide and the top end of the hollow hydraulic cylinder so as to allow the claw opening slide to drive each hook claw arm to close and open. The push member can pass through the top end of the linkage slide. The linkage member is provided with a limit member on the push member which can selectively position the linkage slide and the push member.

11. The power type hydraulic puller according to claim 1, characterized in that: The push piece of the composite power group has a top cone portion for abutting against the assembly shaft at one end corresponding to the hook arm. The top cone portion and the push piece are separate structures, and the push piece and the top cone portion can selectively be plugged with at least one connecting rod sleeve to meet different disassembly stroke requirements.

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