Hydraulic puller

Abstract

The utility model discloses a hydraulic puller which comprises a hydraulic cylinder comprising a piston rod; the clamping jaw assembly comprises a clamping jaw seat and clamping jaws, the clamping jaw seat is connected with the outer wall of the hydraulic cylinder, the clamping jaws are detachably connected with the clamping jaw seat, the number of the clamping jaws is multiple, and each clamping jaw comprises a clamping hook part; the abutting piece comprises an ejector pin and a supporting structure; the hydraulic puller comprises an inner puller state and an outer puller state; in the internal puller state, the hydraulic puller separates the first target workpiece from the first fixed workpiece, the piston rod is detachably connected with the ejector pin, and the ejector pin is used for abutting against the end of the first fixed workpiece; the clamping hook parts of the multiple clamping jaws are oppositely arranged. In the outer puller state, the hydraulic puller is used for separating the second target workpiece from the second fixing workpiece, the piston rod is detachably connected with the supporting structure, and the supporting structure abuts against the upper surface of the second fixing workpiece; and the clamping hook parts of the plurality of clamping claws are arranged oppositely. According to the utility model, the functions of an inner puller and an outer puller can be compatible, and the inner puller and the outer puller can be switched at will.

Description

Technical Field

[0001] The utility model relates to the field of mechanical tools, in particular to a hydraulic puller. Background Art

[0002] In mechanical assembly and maintenance, pullers are usually used to disassemble gears, pulleys and other shaft parts. Their function is to separate the assembled parts from the shaft by applying external force. However, the pullers currently used in the market have many defects: 1. Mechanical thread tightening pullers are more labor-intensive to use, and their pulling force is small, and they cannot pull workpieces with interference fit; 2. The pullers on the market are all wide-jaw pullers, which cannot fit into small gaps, let alone get stuck; 3. The pullers on the market are all internal or external pullers, and the functions of internal and external pullers are not compatible. Utility Model Content

[0003] The utility model aims to solve the problem that ordinary pullers on the market cannot be compatible with the functions of inner and outer pullers. The utility model provides a hydraulic puller that is compatible with the functions of inner and outer pullers and can switch between inner and outer pullers at will.

[0004] In order to solve the above technical problems, the embodiment of the utility model discloses a hydraulic puller, comprising:

[0005] A hydraulic cylinder including a piston rod;

[0006] A claw assembly, comprising a claw seat and a claw, wherein the claw seat is connected to the outer wall of the hydraulic cylinder, the claw is detachably connected to the claw seat, the claw comprises a plurality of claws, and each claw comprises a hook portion;

[0007] an abutment member, including an ejector pin and a support structure;

[0008] The hydraulic puller includes an inner puller state and an outer puller state;

[0009] In the inner puller state, the hydraulic puller is used to detach the first target workpiece from the first fixed workpiece, and the first target workpiece is sleeved outside the first fixed workpiece; the piston rod is detachably connected to the ejector pin, and the ejector pin is used to abut against the end of the first fixed workpiece along the height direction; the hook portions of the plurality of claws are arranged opposite to each other, and the hook portions are used to hook the bottom of the first target workpiece outside the first target workpiece;

[0010] In the external puller state, the hydraulic puller is used to detach the second target workpiece from the second fixed workpiece, the second fixed workpiece is sleeved outside the second target workpiece, and the second target workpiece includes a through hole; the piston rod is detachably connected to the supporting structure, and the supporting structure is used to abut the upper surface of the second fixed workpiece along the height direction; the hook portions of the multiple claws are arranged back to back, and the hook portions are used to extend into the through hole to hook the bottom of the second target workpiece.

[0011] By adopting the above technical solution, the claw is detachably connected to the claw seat, and the piston rod can be detachably connected to the ejector pin and the supporting structure. Therefore, the abutment member can be installed at the extended end of the piston rod and the direction of the hook portion of the claw can be changed at any time as needed.

[0012] Specifically, when the hydraulic puller needs to be in the inner puller state, a pin is installed at the extended end of the piston rod so that it can support the end of the first fixed workpiece, and then check whether the hook parts of the multiple claws are relatively arranged. If not, the claws can be removed from the claw seat and then rotated so that the hook parts of the multiple claws are relatively arranged, that is, the hook parts face the pin, and then installed on the claw seat so that it can hook the bottom of the first target workpiece outside the first target workpiece, and then drive the piston rod to extend downward to achieve the detachment of the first target workpiece from the first fixed workpiece.

[0013] Similarly, when the hydraulic puller needs to be in the external puller state, a support structure is installed at the extended end of the piston rod so that it can support the upper surface of the second fixed workpiece, and then check whether the hook parts of the multiple claws are arranged back to back. If not, the claws are removed from the claw seat and then rotated so that the hook parts of the multiple claws are arranged back to back, that is, the hook parts are facing away from the support structure, and then installed on the claw seat so that it can extend into the through hole in the second target workpiece to hook the bottom of the second target workpiece, and then drive the piston rod to extend downward to achieve the detachment of the second target workpiece from the second fixed workpiece.

[0014] That is to say, the present application realizes the switching of the hydraulic puller between the inner puller state and the outer puller state by providing a claw that can be removed to change the direction of the hook part and a piston rod that can be detachably connected to the ejector pin and the supporting structure. That is, the hydraulic puller of the present application is compatible with the functions of the inner puller and the outer puller.

[0015] According to another specific embodiment of the utility model, the claw seat is sleeved on the outer wall of the hydraulic cylinder and is threadedly connected thereto.

[0016] By adopting the above technical solution, the operator can rotate the claw seat to move it in the height direction relative to the hydraulic cylinder to adjust the distance between the hook portion of the claw and the lower end of the abutment member, so that the distance matches the distance between the upper surface of the fixed workpiece (the first fixed workpiece, the second fixed workpiece) and the lower surface of the target workpiece (the first target workpiece, the second target workpiece), so that the abutment member can support the fixed workpiece and the claw can hook the target workpiece, so as to facilitate the subsequent pulling out of the target workpiece.

[0017] According to another specific embodiment of the utility model, the clamping claws include two, and the two clamping claws are symmetrically arranged along the first direction.

[0018] With the above technical solution, the two clamping claws are symmetrically arranged along the first direction, so that the pressure exerted by the two clamping claws on the target workpiece (the first target workpiece and the second target workpiece) is also symmetrical, thereby avoiding the target workpiece being unable to be pulled out due to uneven force on both sides of the target workpiece. On the other hand, the two symmetrically arranged clamping claws can be applied to the disassembly of target workpieces of various shapes.

[0019] Furthermore, if the target workpiece is circular, the distance between the two jaws is the outer diameter of the target workpiece. If the target workpiece is rectangular, the distance between the two jaws is the distance between the two sides of the target workpiece in the length direction, or the distance between the two sides in the width direction. If the target workpiece is irregular, two suitable symmetrical points that are convenient for applying force can also be selected on the target workpiece, and the distance between the two jaws is the distance between the two points.

[0020] According to another specific embodiment of the utility model, it also includes a screw rod, which is detachably connected to the claw; the claw seat includes a mounting portion, and the screw rod is threadedly connected to the mounting portion, so that the claw and the claw seat are detachably connected.

[0021] By adopting the above technical solution, the claw is detachably connected to the screw rod, and the screw rod is threadedly connected to the mounting portion of the claw seat, that is, the claw is detachably connected to the claw seat. In other words, the screw rod can be removed from the claw seat, and then the claw on the screw rod can be removed, thus realizing the removal of the claw, which is conducive to adjusting the direction of the hook portion of the claw.

[0022] According to another specific embodiment of the utility model, the mounting portion is provided with a threaded hole extending along the first direction, and the screw rod passes through the threaded hole along the first direction and is threadedly connected thereto.

[0023] By adopting the above technical solution, the screw is threadedly connected to the mounting part, and the screw rotates in the threaded hole, and the screw moves along the first direction, and the claw connected to it also moves in the first direction, thereby adjusting the distance in the first direction between the claw and the abutment. The distance between the two claws and the abutment is adjusted simultaneously or successively, so that the spacing between the two claws matches the size of different target workpieces (the first target workpiece, the second target workpiece).

[0024] According to another specific embodiment of the utility model, the mounting portion is provided with a mounting hole extending along the first direction, and the mounting hole is connected with the threaded hole along the first direction; the claw portion is located in the mounting hole; the screw rod extends into the mounting hole along the first direction and is passed through the claw; nuts are provided on both sides of the claw in the first direction, the nuts are threadedly connected with the screw rod, and the two nuts clamp the claw along the first direction so that the screw rod and the claw can be detachably connected.

[0025] With the above technical solution, the two nuts fix the claw on the screw rod to realize the detachable connection between the screw rod and the claw. When the two nuts are unscrewed, the claw can be relatively moved on the screw rod, and the distance between the claw and the abutment member in the first direction can also be adjusted.

[0026] According to another specific embodiment of the present invention, the clamping claw further includes a convex portion, and the convex portion is in contact with the upper surface of the mounting portion to limit the movement of the clamping claw relative to the mounting portion along the height direction.

[0027] By adopting the above technical solution, the lower surface of the protrusion fits with the upper surface of the mounting portion to limit the movement of the claw relative to the mounting portion in the height direction.

[0028] According to another specific embodiment of the utility model, the supporting structure includes a cross bar, a first vertical bar and a second vertical bar, the first vertical bar and the second vertical bar are used to abut the upper surface of the second fixed workpiece; the first vertical bar and the second vertical bar are both detachably connected to the cross bar; the cross bar and the piston rod are threadedly connected.

[0029] According to another specific embodiment of the present utility model, the first vertical rod and the second vertical rod are symmetrically arranged with respect to the piston rod.

[0030] With the above technical solution, the lower ends of the first vertical rod and the second vertical rod are used to support the upper surface of the second fixed workpiece. The first vertical rod and the second vertical rod are respectively located at the two ends of the length direction of the crossbar, and are symmetrically arranged about the piston rod to ensure that the pressure applied by the first vertical rod and the second vertical rod to the second fixed workpiece is symmetrical, so that the support structure can better abut the second fixed workpiece, so as to facilitate the claw to pull out the second target workpiece.

[0031] According to another specific implementation of the utility model, the hook portion is in a hook shape.

[0032] Compared with the existing embodiments in which the hook portion is mostly flat, which cannot firmly hook the target workpiece (the first target workpiece, the second target workpiece), the hook portion of the present application is arranged in a curved hook shape, which can more reliably hook the target workpiece and prevent the hook portion of the claw from detaching from the target workpiece.

[0033] According to another specific embodiment of the utility model, the claw includes an extension portion, the convex portion and the hook portion are respectively located at two ends of the extension portion and connected thereto; along the extension direction of the hook portion and away from the extension portion, the thickness of the hook portion gradually decreases.

[0034] By adopting the above technical solution, the thickness of the hook portion gradually decreases along the extension direction of the hook portion and away from the extension direction, so that the hook portion of the claw can easily extend into some small gaps to hook the target workpiece (the first target workpiece, the second target workpiece).

[0035] According to another specific embodiment of the present invention, the thickness of the extension portion is 9 mm to 11 mm.

[0036] By adopting the above technical solution, compared with the thickness of the claws in the existing implementation, the thickness of the extension portion of the claws of the present application is smaller, and it can be inserted into some small gaps to hook out the target workpieces (the first target workpiece, the second target workpiece). BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A three-dimensional diagram showing a hydraulic puller according to an embodiment of the utility model Figure 1 , wherein the hydraulic puller is in the inner puller state;

[0038] Figure 2 A three-dimensional diagram showing a hydraulic puller according to an embodiment of the utility model Figure 2 , wherein the hydraulic puller is in the external puller state;

[0039] Figure 3 A three-dimensional diagram showing a claw assembly according to an embodiment of the present utility model;

[0040] Figure 4 A cross-sectional view of a claw assembly according to an embodiment of the present utility model is shown;

[0041] Figure 5 A three-dimensional diagram showing the connection between the clamping claw and the screw rod in the embodiment of the utility model;

[0042] Figure 6 A three-dimensional diagram showing the claw of an embodiment of the utility model;

[0043] Figure 7 A three-dimensional diagram showing the support structure of an embodiment of the utility model;

[0044] Figure 8 A three-dimensional diagram showing a second vertical rod of an embodiment of the utility model;

[0045] Fig. 9 A partial enlarged view of the hook portion of an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0046] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0047] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0048] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0049] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0050] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0051] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0052] refer to Figures 1 to 3 The present application provides a hydraulic puller 1, comprising a hydraulic cylinder 2, a claw assembly 3 and an abutment member. The hydraulic cylinder 2 comprises a piston rod 200. For example, the piston rod 200 can move in a height direction ( Figure 1 The device moves up and down (as shown in the Z direction).

[0053] For example, compared with the mechanical thread tightening puller in the existing implementation, the present application adopts the hydraulic cylinder 2 as the power element, which can save manpower, increase the pulling force, and can pull some target workpieces with interference fit (first target workpiece, second target workpiece), such as inner and outer bearings, inner and outer bushings, rotary transformer sensors, locking rings, etc.

[0054] Furthermore, the hydraulic puller 1 of the present application uses the hydraulic cylinder 2 as a power element and has a load-bearing capacity of 5 tons or 10 tons.

[0055] Exemplarily, the hydraulic cylinder 2 is connected to the pressure rod 6 to drive the piston rod 200 to move in the height direction ( Figure 1 Exemplarily, the pressure rod 6 is convenient for the operator to press up and down to continuously increase the pressure in the hydraulic cylinder 2, so that the piston rod 200 extends downward to continuously support the fixed workpiece (the first fixed workpiece, the second fixed workpiece), so as to facilitate the claw 301 described later to pull out the target workpiece (the first target workpiece, the second target workpiece).

[0056] The above-mentioned claw assembly 3 includes a claw seat 300 and a claw 301. The claw seat 300 is connected to the outer wall of the hydraulic cylinder 2. The claw 301 is detachably connected to the claw seat 300. The claw 301 includes multiple claws, and each of the multiple claws 301 includes a hook portion 302, which is used to hook the target workpiece.

[0057] The abutment member includes a pin 400 and a support structure 401. Exemplarily, the abutment member is used to abut and fix a workpiece.

[0058] The hydraulic puller 1 includes an inner puller state and an outer puller state.

[0059] In the Nerama state Figure 1 As shown), the hydraulic puller 1 is used to separate the first target workpiece from the first fixed workpiece, and the first target workpiece is sleeved outside the first fixed workpiece; the piston rod 200 is detachably connected to the ejector pin 400, and the ejector pin 400 is moved along the height direction ( Figure 1 The end of the first fixed workpiece (not shown in the figure) is supported by the clamping claws 301, and the clamping hooks 302 of the plurality of clamping claws 301 are arranged opposite to each other.

[0060] Exemplarily, the present embodiment is provided with two claws 301, and the hook portions 302 of the two claws 301 are in the inner puller state along the first direction ( Figure 1 However, those skilled in the art will appreciate that, in other implementations, multiple claws 301 may be provided, and the hook portions 302 of the multiple claws 301 all face the projection of the ejector pin 400 in the height direction in the inner puller state.

[0061] The hook portion 302 is used to hook the bottom of the first target workpiece outside the first target workpiece. Exemplarily, the ejector pin 400 is conical and supports the center of the first fixed workpiece.

[0062] For example, in the inner puller state, taking the removal of the bearing (first target workpiece) from the mandrel (first fixed workpiece) as an example, the tip of the ejector pin 400 presses against the upper end surface of the mandrel, the hook portion 302 of the claw 301 hooks the bottom of the bearing, and then drives the piston rod 200 to move in the height direction ( Figure 1 When the claw 301 extends downward (as shown in the Z direction), the hook portion 302 of the claw 301 moves upward relative to the ejector pin 400, and the bearing is pulled out during the upward movement of the hook portion 302, thereby realizing the separation of the bearing from the core shaft.

[0063] In the external puller state ( Figure 2 The hydraulic puller 1 is used to separate the second target workpiece from the second fixed workpiece. The second fixed workpiece is sleeved outside the second target workpiece. The second target workpiece includes a through hole (not shown in the figure); the piston rod 200 is detachably connected to the support structure 401, and the support structure 401 is used to move along the height direction ( Figure 2 The upper surface of the second fixed workpiece is supported by the plurality of claws 301 (shown in the Z direction), and the hook portions 302 of the plurality of claws 301 are arranged opposite to each other.

[0064] Exemplarily, the present embodiment is provided with two claws 301, and the hook portions 302 of the two claws 301 are in the outer puller state along the first direction ( Figure 2 However, those skilled in the art will appreciate that, in other implementations, multiple claws 301 may be provided, and the hook portions 302 of the multiple claws 301 are all facing away from the support structure 401 in the external puller state.

[0065] The hook portion 302 is used to extend into the through hole of the second target workpiece to hook the bottom of the second target workpiece.

[0066] For example, taking the removal of a disc (second target workpiece) from a housing (second fixed workpiece), the disc is embedded in the housing, and there is a through hole in the center of the disc. There is no structure for the ejector pin 400 to support it, and the hook portion 302 of the claw 301 cannot extend from the gap between the disc and the housing. When the hydraulic puller 1 of the present application is in the external puller state, the housing can be supported by the support structure 401, the claw 301 extends into the through hole of the disc, and the hook portion 302 hooks the lower surface of the disc. Then the piston rod 200 is driven in the height direction ( Figure 2 When the claw 301 extends downward (as shown in the Z direction), the hook portion 302 of the claw 301 moves upward relative to the supporting structure 401, and the disc is pulled upward during the upward movement of the hook portion 302, so that the disc is separated from the shell.

[0067] By adopting the above technical solution, the claw 301 is detachably connected to the claw seat 300, and the piston rod 200 can be detachably connected to the ejector pin 400 and the support structure 401. Therefore, an abutment member can be installed at the protruding end of the piston rod 200 at any time as needed, and the direction of the hook portion 302 of the claw 301 can be changed.

[0068] Specifically, when the hydraulic puller 1 needs to be in the inner puller state, the ejector pin 400 is installed at the protruding end of the piston rod 200 so that it can support the end of the first fixed workpiece, and then check whether the hook portions 302 of the multiple claws 301 are relatively arranged. If not, the claws 301 can be removed from the claw seat 300 and then rotated so that the hook portions 302 of the multiple claws 301 are relatively arranged, that is, the hook portions 302 face the ejector pin 400, and then install it on the claw seat 300 so that it can hook the bottom of the first target workpiece outside the first target workpiece, and then drive the piston rod 200 to extend downward to achieve the detachment of the first target workpiece from the first fixed workpiece.

[0069] Similarly, when the hydraulic puller 1 needs to be in the external puller state, a support structure 401 is installed at the protruding end of the piston rod 200 so that it can support the second fixed workpiece, and then check whether the hook portions 302 of the multiple claws 301 are arranged back to back. If not, the claws 301 are removed from the claw seat 300 and then rotated so that the hook portions 302 of the multiple claws 301 are arranged back to back, that is, the hook portions 302 are facing away from the support structure 401, and then installed on the claw seat 300 so that it can extend into the through hole of the second target workpiece to hook the second target workpiece, and then drive the piston rod 200 to extend downward to achieve the detachment of the second target workpiece from the second fixed workpiece.

[0070] That is to say, the present application realizes the switching of the hydraulic puller 1 between the inner puller state and the outer puller state by providing a claw 301 that can be removed to change the direction of the hook portion 302, and a piston rod 200 that can be detachably connected to the ejector pin 400 and the support structure 401. That is, the hydraulic puller 1 of the present application is compatible with the functions of the inner puller and the outer puller.

[0071] refer to Figure 1 , Figure 3 and Figure 4 In some possible implementations, the claw seat 300 is sleeved on the outer wall of the hydraulic cylinder 2 and is threadedly connected thereto. For example, the outer wall of the hydraulic cylinder 2 is provided with an external thread (not shown in the figure), the claw seat 300 is provided with a connecting hole 303, the connecting hole 303 is provided with an internal thread, the claw seat 300 is sleeved outside the hydraulic cylinder 2, and the external thread of the hydraulic cylinder 2 is connected to the internal thread on the connecting hole 303 of the claw seat 300, then the operator can rotate the claw seat 300 to make it change height direction ( Figure 3 The distance between the claw 301 connected to the claw seat 300 and the abutment installed at the lower end of the piston rod 200 is adjusted to match the distance between the upper surface of the fixed workpiece and the lower surface of the target workpiece, so that the abutment can support the fixed workpiece and the claw 301 can hook the target workpiece, so as to facilitate the subsequent pulling out of the target workpiece.

[0072] In some possible implementations, the claws 301 include two claws 301, and the two claws 301 are arranged along the first direction ( Figure 4 Exemplarily, the two clamping claws 301 are symmetrically arranged along the first direction, so that the pressure exerted by the two clamping claws 301 on the target workpiece is also symmetrical, thereby avoiding the target workpiece being unable to be pulled out due to uneven force on both sides of the target workpiece.

[0073] On the other hand, the two symmetrically arranged clamping jaws 301 can be applied to disassembly of target workpieces of various shapes.

[0074] Specifically, if the target workpiece is circular, the spacing between the two clamping claws 301 is the radial dimension of the target workpiece. If the target workpiece is rectangular, the spacing between the two clamping claws 301 is the distance between the two sides of the target workpiece in the length direction, or the distance between the two sides in the width direction. If the target workpiece is irregular, two suitable symmetrical points that are convenient for applying force can also be selected on the target workpiece, and the spacing between the two clamping claws 301 is the distance between the two points.

[0075] refer to Figures 3 to 5In some possible implementations, it also includes a screw 500, which is detachably connected to the claw 301; the claw seat 300 includes a mounting portion 304, and the screw 500 is threadedly connected to the mounting portion 304, so that the claw 301 and the claw seat 300 are detachably connected.

[0076] Exemplarily, the claw 301 is detachably connected to the screw rod 500, and the screw rod 500 is threadedly connected to the mounting portion 304 of the claw seat 300, that is, the claw 301 is detachably connected to the claw seat 300. In other words, the screw rod 500 can be removed from the claw seat 300, and then the claw 301 on the screw rod 500 can be removed, so that the claw 301 can be removed, which is conducive to adjusting the direction of the hook portion 302 of the claw 301.

[0077] In some possible implementations, the mounting portion 304 is provided with a first direction ( Figure 4 The threaded hole 307 extends (as shown in the X direction), and the screw rod 500 passes through the threaded hole 307 along the first direction and is threadedly connected thereto.

[0078] Exemplarily, the screw rod 500 is threadedly connected to the mounting portion 304, and the screw rod 500 rotates in the threaded hole 307, and the screw rod 500 moves along the first direction ( Figure 4 As the first clamping jaw 301 moves (as shown in the X direction), the clamping jaw 301 connected thereto also moves in the first direction, thereby adjusting the distance between the clamping jaw 301 and the abutment member in the first direction, and adjusting the distance between the two clamping jaws 301 and the abutment member simultaneously or successively, so that the spacing between the two clamping jaws 301 matches the size of different target workpieces (the first target workpiece, the second target workpiece).

[0079] It should be noted that the distance between the two claws 301 can be adjusted by rotating the screws 500 corresponding to the two claws 301 simultaneously or successively, so as to achieve the purpose of adjusting the distance between the two claws 301 while ensuring that the two claws 301 are symmetrically arranged about the piston rod 200.

[0080] refer to Figures 3 to 6 In some possible implementations, the mounting portion 304 is provided along the first direction ( Figure 4 The mounting hole 305 extends along the first direction (shown in the X direction), and the mounting hole 305 is connected with the threaded hole 307 along the first direction; the claw 301 is partially located in the mounting hole 305; the screw 500 extends into the mounting hole 305 along the first direction and is penetrated by the claw 301; nuts 501 are provided on both sides of the first direction of the claw 301, the nuts 501 are threadedly connected with the screw 500, and the two nuts 501 clamp the claw 301 along the first direction, so that the screw 500 and the claw 301 can be detachably connected.

[0081] Exemplarily, a circular hole 308 is provided on the claw 301 and penetrates along the first direction. The screw 500 passes through the threaded hole 307 and enters the mounting hole 305, and passes through the circular hole 308 of the claw 301. Nuts 501 are provided on both sides of the first direction of the claw 301. The nuts 501 are threadedly connected to the screw 500 to fix the claw 301 on the screw 500.

[0082] It is easy to understand that when the nut 501 is unscrewed, the claws 301 can move relatively along the first direction on the screw rod 500, and the distance between the two claws 301 can also be adjusted.

[0083] refer to Figure 3 and Figure 4 In some possible implementations, the claw 301 further includes a convex portion 306, which fits against the upper surface of the mounting portion 304 to limit the movement of the claw 301 relative to the mounting portion 304 in the height direction. Figure 3 The width of the protrusion 306 is greater than the width of the mounting hole 305, so that the lower surface of the protrusion 306 fits with the upper surface of the mounting portion 304 to limit the claw 301 relative to the mounting portion 304 in the height direction ( Figure 3 Move in the Z direction.

[0084] refer to Figure 2 , Figure 7 and Figure 8 In some possible implementations, the support structure 401 includes a crossbar 402 , a first vertical bar 403 , and a second vertical bar 404 . The first vertical bar 403 and the second vertical bar 404 are used to abut against the upper surface of the second fixed workpiece, and the first vertical bar 403 and the second vertical bar 404 are both detachably connected to the crossbar 402 .

[0085] Specifically, the first vertical rod 403 and the second vertical rod 404 are both provided with square holes 405, and the cross bar 402 passes through the square holes 405 of the first vertical rod 403 and the square holes 405 of the second vertical rod 404. The tops of the first vertical rod 403 and the second vertical rod 404 are both provided with fixing holes 406 that are connected to the square holes 405, and the fixing holes 406 are provided with internal threads, and the fixing holes 406 are passed through by screws 407, so that the bottom of the screws 407 abuts against the upper surface of the cross bar 402, thereby realizing the connection between the cross bar 402 and the first vertical rod 403, and the connection between the cross bar 402 and the second vertical rod 404.

[0086] It is easy to understand that in actual application, it may be necessary to adjust the distance between the first vertical rod 403 and the second vertical rod 404 to match the distance between the two points on the second fixed workpiece that can be abutted. In this case, it is only necessary to unscrew the screw 407 from the fixing hole 406 so that the first vertical rod 403 and the second vertical rod 404 can move relative to the cross bar 402, thereby adjusting the distance between the first vertical rod 403 and the second vertical rod 404. After the adjustment is appropriate, the screw 407 is screwed into the fixing hole 406 to fix the first vertical rod 403 and the second vertical rod 404 to the cross bar 402.

[0087] It should be noted that, in this embodiment, in the outer puller state, the distance between the first vertical rod 403 and the second vertical rod 404 is greater than the distance between the two claws 301 .

[0088] The cross bar 402 is threadedly connected to the piston rod 200. Exemplarily, the first vertical bar 403 and the second vertical bar 404 are detachably connected to the piston rod 200 through the cross bar 402. Exemplarily, a thread groove 408 is provided at the center point of the cross bar 402, and the piston rod 200 is provided with an external thread, and the lower end of the piston rod 200 is inserted into the thread groove 408 to achieve the threaded connection between the piston rod 200 and the cross bar 402.

[0089] The first vertical rod 403 and the second vertical rod 404 are symmetrically arranged about the piston rod 200. For example, the lower ends of the first vertical rod 403 and the second vertical rod 404 are used to support the second fixed workpiece. The first vertical rod 403 and the second vertical rod 404 are respectively located in the length direction of the cross bar 402 ( Figure 7 The two ends of the support structure 401 are symmetrically arranged about the piston rod 200 to ensure that the pressure applied by the first vertical rod 403 and the second vertical rod 404 to the second fixed workpiece is symmetrical, so that the support structure 401 can better abut the second fixed workpiece, so as to facilitate the claw 301 to pull out the second target workpiece.

[0090] refer to Fig. 9 In some possible implementations, the hook portion 302 is in the shape of a hook. For example, compared with the existing implementations where the hook portion 302 is mostly flat, it cannot firmly hook the target workpiece. The setting of the hook portion 302 of the present application can more reliably hook the target workpiece and prevent the hook portion 302 of the claw 301 from being separated from the target workpiece.

[0091] refer to Figure 6 and Fig. 9In some possible implementations, the claw 301 includes an extension portion 309, and the convex portion 306 and the hook portion 302 are respectively located at both ends of the extension portion 309 and connected thereto; along the extension direction of the hook portion 302 and away from the extension portion 309, the thickness of the hook portion 302 gradually decreases. Exemplarily, along the extension direction of the hook portion 302 and away from the extension portion 309, the thickness of the hook portion 302 gradually decreases, so that the hook portion 302 of the claw 301 can easily extend into some small gaps to hook the target workpiece.

[0092] In some possible implementations, the thickness H1 of the extension portion 309 is 9 mm to 11 mm, that is, the thickness H1 of the extension portion 309 may be 9 mm, 10 mm, or 11 mm. Preferably, the thickness H1 of the extension portion 309 of this embodiment is 10 mm.

[0093] For example, compared with the thickness of the claw 301 in the existing embodiment, the extension portion 309 of the claw 301 of the present application has a smaller thickness and can be more easily inserted into some small gaps to hook out the target workpiece.

[0094] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A hydraulic puller, characterized in that: include: A hydraulic cylinder including a piston rod; A claw assembly, comprising a claw seat and a claw, wherein the claw seat is connected to the outer wall of the hydraulic cylinder, the claw is detachably connected to the claw seat, the claw comprises a plurality of claws, and each claw comprises a hook portion; an abutment member, including an ejector pin and a support structure; The hydraulic puller includes an inner puller state and an outer puller state; In the inner puller state, the hydraulic puller is used to detach the first target workpiece from the first fixed workpiece, and the first target workpiece is sleeved outside the first fixed workpiece; The piston rod is detachably connected to the ejector pin, and the ejector pin is used to abut against the end of the first fixed workpiece along the height direction; the hook portions of the plurality of claws are arranged opposite to each other, and the hook portions are used to hook the bottom of the first target workpiece outside the first target workpiece; In the external puller state, the hydraulic puller is used to detach the second target workpiece from the second fixed workpiece, the second fixed workpiece is sleeved outside the second target workpiece, and the second target workpiece includes a through hole; the piston rod is detachably connected to the supporting structure, and the supporting structure is used to abut the upper surface of the second fixed workpiece along the height direction; the hook portions of the multiple claws are arranged back to back, and the hook portions are used to extend into the through hole to hook the bottom of the second target workpiece.

2. The hydraulic puller according to claim 1, characterized in that: The clamping claw seat is sleeved on the outer wall of the hydraulic cylinder and is threadedly connected thereto.

3. The hydraulic puller according to claim 2, characterized in that: The clamping claws include two, and the two clamping claws are symmetrically arranged along the first direction.

4. The hydraulic puller according to claim 3, characterized in that: It also includes a screw rod, which is detachably connected to the claw; the claw seat includes a mounting portion, and the screw rod is threadedly connected to the mounting portion, so that the claw and the claw seat are detachably connected.

5. The hydraulic puller according to claim 4, characterized in that: The mounting portion is provided with a threaded hole extending along the first direction, and the screw rod passes through the threaded hole along the first direction and is threadedly connected thereto.

6. The hydraulic puller according to claim 5, characterized in that: The mounting portion is provided with a mounting hole extending along the first direction, and the mounting hole is connected with the threaded hole along the first direction; the claw portion is located in the mounting hole; the screw rod extends into the mounting hole along the first direction and passes through the claw; nuts are provided on both sides of the claw in the first direction, the nuts are threadedly connected with the screw rod, and the two nuts clamp the claw along the first direction so that the screw rod and the claw can be detachably connected.

7. The hydraulic puller according to claim 6, characterized in that: The clamping claw further includes a convex portion, and the convex portion is in contact with the upper surface of the mounting portion to limit the movement of the clamping claw relative to the mounting portion along the height direction.

8. The hydraulic puller according to claim 1, characterized in that: The supporting structure comprises a cross bar, a first vertical bar and a second vertical bar, wherein the first vertical bar and the second vertical bar are used to abut against the upper surface of the second fixed workpiece; the first vertical bar and the second vertical bar are both detachably connected to the cross bar; and the cross bar is threadedly connected to the piston rod.

9. The hydraulic puller according to claim 8, characterized in that: The first vertical rod and the second vertical rod are symmetrically arranged with respect to the piston rod.

10. The hydraulic puller according to claim 1, characterized in that: The hook portion is in a curved hook shape.

11. The hydraulic puller according to claim 7, characterized in that: The claw comprises an extension portion, the convex portion and the hook portion are respectively located at two ends of the extension portion and connected thereto; along the extension direction of the hook portion and in a direction away from the extension portion, the thickness of the hook portion gradually decreases.

12. The hydraulic puller according to claim 11, characterized in that: The thickness of the extension portion is 9 mm to 11 mm.

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