Pulling and grabbing structure and puller device

Abstract

The utility model relates to the technical field of disassembly and assembly equipment, and discloses a pulling and grabbing structure and a puller device. The pulling and grabbing structure comprises a pulling and grabbing rod and at least two grabbing hooks, at least two grabbing hook grooves are formed in one end of the pulling and grabbing rod in the circumferential direction at intervals, and any one grabbing hook groove extends in the axial direction of the pulling and grabbing rod; the at least two grabbing hooks and the at least two pulling and grabbing grooves are correspondingly arranged, and one end of each grabbing hook is hinged to the pulling and grabbing rod, so that the grabbing hooks are opened and closed within a preset included angle range relative to the axial direction of the pulling and grabbing rod; and under the action of external force, the pulling and grabbing structure clamps the to-be-disassembled workpiece through the grabbing hook and pulls the to-be-disassembled workpiece to fall off. According to the pulling and grabbing structure, the multiple grabbing hooks are movably arranged relative to the pulling and grabbing rod in an embedded mode, the grabbing hooks are folded back into the pulling and grabbing hook grooves to reduce the overall width of the pulling and grabbing structure when subjected to external force, the grabbing hooks are stretched again to clamp a workpiece after the external force disappears, use is flexible, the pulling and grabbing structure can adapt to the narrow space of a machine table or the interior of a tiny bearing, efficient disassembly is achieved, and the use range is expanded.

Description

Technical Field

[0001] This utility model relates to the field of disassembly and assembly equipment technology, specifically to a pull gripper structure and a puller device. Background Technology

[0002] Currently, pullers are widely used to disassemble various couplings, gears, bearings, pulleys and other fastened parts on shafts. Among them, the widely used mechanical pullers include a hook seat, a screw and multiple hooks. The user holds the hook seat and hooks multiple hooks simultaneously onto the bearing installed on the shaft. Then, the screw is rotated to abut against the shaft. Continuing to rotate the screw removes the bearing from the shaft.

[0003] However, the relevant technology lacks a structure for disassembling the bearing on the bushing. The aforementioned puller screw lacks a force-bearing position and cannot be used. Furthermore, since the puller has a fixed size and applicable range, different models of pullers need to be replaced for different sizes of bearings or different working spaces, which is inconvenient. Especially for small bearings that cannot be pulled out by grabbing from the outside, or for spaces with limited space, the grab hook cannot be reliably engaged with the outside of the bearing or cannot be inserted into the inside of the bearing, making it difficult to effectively disassemble the bearing. Utility Model Content

[0004] In view of this, the present invention provides a pull-grab structure and a puller device to solve the problems of limited applicability and inconvenience of use of existing puller devices.

[0005] In a first aspect, this utility model provides a pull-grip structure, comprising: a pull-grip rod and at least two grippers, wherein at least two gripper slots are spaced apart at one end of the pull-grip rod along the circumferential direction, and any one of the gripper slots extends along the axial direction of the pull-grip rod; at least two grippers are correspondingly arranged with at least two pull-grip slots; one end of any gripper is hinged to the pull-grip rod so that the gripper opens and closes within a preset angle range relative to the axial direction of the pull-grip rod; under the action of external force, the pull-grip structure is suitable for pulling the workpiece to be disassembled off by gripping it with the gripper hook.

[0006] In one optional implementation, the preset included angle between the axial direction of the grab hook and the pull rod is in the range of 0° to 90°.

[0007] In one alternative embodiment, in the axial direction of the grab bar, the inner wall surface of the grab hook groove, which is relatively close to the end of the grab hook that is hinged to the grab bar, is configured as an inclined surface with the distance between it and the inner wall surface on the other side gradually increasing from the outside to the inside.

[0008] In one alternative embodiment, the grabbing structure further includes an adjustment component, which is telescopically disposed at the end of the grabbing rod away from the grabbing hook groove, and is adapted to adjust the axial length of the grabbing structure.

[0009] In one optional embodiment, the adjustment assembly includes: a first adjustment member, a second adjustment member, a third adjustment member, and a first locking member. The first adjustment member has an internal thread at at least one end; the second adjustment member has an external thread, and a first end of the second adjustment member engages with the internal thread of the first adjustment member via the external thread; one end of the third adjustment member has an internal thread and is threadedly connected to the second end of the second adjustment member; the other end of the third adjustment member has a connecting groove, and the end of the pull rod away from the hook groove is rotatably disposed in the connecting groove; the first locking member is adapted to pass through the connecting groove and the pull rod to lock the pull rod in the connecting groove.

[0010] Secondly, this utility model provides a puller device, including: a support structure, a mounting assembly, and the aforementioned pull-grip structure. The mounting assembly includes a mounting rod, which is movably mounted on the support structure. The pull-grip structure is mounted on the mounting rod and is adapted to move along the axial direction of the mounting rod. Under the action of an external force, the mounting rod and the pull-grip structure are adapted to move relative to the support structure.

[0011] In one alternative embodiment, multiple pull-grip structures are provided, spaced apart along the circumferential direction of the mounting rod, and hinged to the mounting rod.

[0012] In one alternative embodiment, the mounting rod has an external thread and is threadedly connected to the bracket structure; a first through hole is provided at the end of the mounting rod that is relatively away from the grabbing structure, the first through hole being arranged in the radial direction of the mounting rod, suitable for setting an external force-applying structure to drive the mounting assembly and the grabbing structure to move relative to the bracket structure.

[0013] In one alternative embodiment, the mounting assembly further includes: a connector, a second locking member, and a third locking member, the connector having internal threads and movably disposed on the mounting rod; a pull-grip structure mounted on the connector; the second locking member and the third locking member being disposed on opposite sides of the connector along the axial direction of the mounting rod; the second locking member and the third locking member having internal threads and movably disposed on the mounting rod; the mounting assembly having the second locking member and the third locking member facing each other or moving away to lock or release the connector on the mounting rod.

[0014] In one optional embodiment, the support structure includes: a first support rod and at least two second support rods, with the mounting rod movably disposed on the first support rod; one end of the second support rod is slidably disposed on the first support rod, and the other end is adapted to be fixed to the base to support the first support rod, with at least two second support rods located on both sides of the first support rod; the second support rod includes at least two nested telescopic portions to adjust the length of the second support rod.

[0015] This utility model has the following advantages:

[0016] 1. The pull gripper structure provided by this utility model has multiple gripping hooks arranged in an embedded structure relative to the pull gripper rod. When subjected to external force, the hooks fold back into the gripping hook grooves inside the pull gripper rod, reducing the overall width of the pull gripper structure. After the external force disappears, the hooks unfold again to pick up and disassemble the workpiece. It is flexible and convenient to use, and can be adapted to operation in narrow machine space or to disassemble inside tiny bearings, achieving efficient disassembly. It effectively expands the application in the disassembly of tiny sleeve structures and effectively broadens the scope of application.

[0017] 2. The pull gripping structure provided by this utility model has an inner wall surface at the lower end of the gripping hook groove set as an inclined surface. The angle between the inclined surface and the right end face of the gripping hook groove is an acute angle, so that the angle between the gripping hook and the pull gripping rod when the gripping hook is fully extended is less than 90°. When pulling the workpiece to be disassembled, it has a radial clamping force on it, preventing shaking or even falling off, and effectively improving stability.

[0018] 3. The pull gripping structure provided by this utility model includes a pull gripping rod, a gripping hook hinged to the lower end of the pull gripping rod, and an adjustment component detachably and movably disposed at the upper end of the pull gripping rod. The adjustment component is configured as a telescopic structure with adjustable length, thereby realizing the length adjustment of the entire pull gripping structure.

[0019] 4. The puller device provided by this utility model includes a support structure, a mounting component, and the aforementioned puller structure. The support structure is fixedly installed, providing a stable support point and force application point for the use of the puller device. The mounting component is equipped with multiple puller structures, the length of which is adjustable. These puller structures firmly grip and disassemble workpieces, ensuring high reliability. Furthermore, the hooks are retractable and extendable, making them suitable for various small workpieces. A single puller structure is suitable for smaller bearings, while multiple puller structures can work together to handle larger workpieces, resulting in a wide range of applications and high flexibility.

[0020] 5. The puller device provided by this utility model includes a connecting member, a second locking member, and a third locking member in the installation assembly. The position of the connecting member on the installation rod is adjustable. The second and third locking members are used to clamp and fix the position of the connecting member on the installation rod from the top and bottom. The threaded locking method has high reliability.

[0021] 6. The puller device provided by this utility model has a support structure including a horizontal first support rod and two vertical second support rods; the two second support rods are respectively set on the mounting component and the pull-grip structure and on both sides, and can be slidably set on the first support rod. At the same time, the second support rod is also set as a telescopic structure with adjustable length, which is highly flexible and suitable for equipment and workspaces of different heights and widths, with a wide range of applications. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the pull-grip structure card before the workpiece is disassembled according to an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the pull-grip structure card receiving the disassembled workpiece according to an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the puller device before pulling out the workpiece to be disassembled according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the puller device pulling out the workpiece to be disassembled according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100. Workpieces to be disassembled;

[0029] 1. Pulling bar; 11. Hook groove; 2. Hook; 3. Adjustment assembly; 31. First adjusting component; 32. Second adjusting component; 33. Third adjusting component; 331. Connecting groove; 34. First locking component;

[0030] 101, First support rod; 1011, Connecting rod; 1011a, Second through hole; 1011b, First connecting hole; 1011c, Second connecting hole; 1012, First rod; 1013, Second rod; 1014, Limiting part; 102, Second support rod; 1021, First telescopic part; 1022, Second telescopic part; 1023, Support body; 20, Mounting assembly; 201, Mounting rod; 2011, First through hole; 202, Connecting piece; 2021, Body; 2022, Extension part; 203, Second locking piece; 204, Third locking piece; 30, Pull-grab structure. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, for ease of description, only the parts relevant to the present invention are shown in the drawings, not all of the structures. The drawings show various structural schematic diagrams according to embodiments of the present invention. These diagrams are not drawn to scale, and some details are enlarged for clarity, and some details may be omitted. The shapes of the various regions shown in the figures and their relative sizes and positional relationships are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs. In the context of the present invention, when a layer / element is referred to as being "on" another layer / element, the layer / element may be directly on the other layer / element, or there may be an intermediate layer / element between them. Additionally, if a layer / element is "on" another layer / element in one orientation, then when the orientation is reversed, the layer / element may be "below" the other layer / element.

[0032] Example 1

[0033] like Figure 1 and Figure 2 As shown, this embodiment provides a pull gripping structure 30, including a pull gripping rod 1 and at least two gripping hooks 2. At least two gripping hook slots 11 are spaced apart at one end of the pull gripping rod 1 in the circumferential direction, and any one of the gripping hook slots 11 extends along the axial direction of the pull gripping rod 1. At least two gripping hooks 2 are correspondingly arranged with at least two pull gripping slots, and one end of any one of the gripping hooks 2 is hinged to the pull gripping rod 1 so that the gripping hook 2 opens and closes within a preset angle range relative to the axial direction of the pull gripping rod 1. Under the action of external force, the pull gripping structure 30 is suitable for pulling the workpiece 100 to be disassembled to fall off by gripping the workpiece 100 to be disassembled through the gripping hooks 2.

[0034] Specifically, in Figure 1 At the angle shown, two hook grooves 11 are provided at the lower end of the grab rod 1. The two hook grooves 11 are 180° apart and corresponding to each other on the outer periphery of the grab rod 1 and are set at the same height. Two hooks 2 are respectively provided in the two hook grooves 11. The lower end of each hook 2 is connected to the lower end of the grab rod 1. The hook 2 can rotate around the connection position and fit into the hook groove 11 or form a certain angle with the grab rod 1. The workpiece 100 to be disassembled can be a bearing, bushing, bushing, or other annular sleeve structure with a space inside to accommodate the grab structure 30 extending into it. In this embodiment, a bearing is used as an example for explanation.

[0035] Figure 1The diagram shows the moment when the lower end of the gripper hook 2 just contacts the workpiece 100 to be disassembled. At this point, as the gripper rod 1 moves downwards and the gripper hook 2 extends into the workpiece 100, it receives pressure from the inner wall of the workpiece 100 and rotates towards the gripper groove until the lower end of the gripper rod 1 passes through the workpiece 100. At this point, the pressure of the workpiece 100 on the gripper hook 2 disappears. Figure 2 The hook 2 extends so that its upper end abuts against the lower end of the workpiece 100 to be disassembled. Then, the pull rod 1 moves upward, and the hook 2 engages with the workpiece to be disassembled, thereby moving it upward and detaching the workpiece 100 from other structures. In this embodiment, the pull-grip structure 30 has multiple hooks 2 arranged in an embedded structure relative to the pull rod 1. When subjected to external force, they fold back into the hook groove 11 inside the pull rod 1, reducing the overall width of the pull-grip structure 30. After the external force disappears, they re-extend to engage the workpiece 100 to be disassembled. This flexible design allows for operation in confined machine spaces or for disassembly operations inside small bearings, achieving efficient disassembly and effectively expanding its application in the disassembly of small sleeve structures.

[0036] In one embodiment, the preset angle between the hook 2 and the axial direction of the pull rod 1 ranges from 0° to 90°. The hook 2 can be configured as a cylindrical structure or a plate-like structure, with the shape of the pull groove corresponding to it, so that the hook 2 can retract into the hook groove 11 when subjected to external force. At the same time, the hook groove 11 has a locking effect on the hook 2 from below, restricting the hook 2 from rotating counterclockwise continuously, ensuring that the hook 2 has an upward supporting force on the workpiece 100 to be disassembled after it extends to the lower end of the workpiece 100 to be disassembled. Thus, when the hook 2 structure moves upward, it can drive the workpiece 100 to be disassembled to move upward and detach from other structures. The angle between the extension direction of the hook 2 and the axial direction of the pull rod 1 is different depending on the inner diameter of the workpiece 100 to be disassembled. The angle changes continuously as the pull structure 30 gradually extends downward. The preset angle of 0° is the state in which the hook 2 is completely retracted into the hook groove 11.

[0037] Furthermore, in the axial direction of the grab rod 1, the inner wall surface of the grab hook groove 11, which is relatively close to the end of the grab hook 2 that is hinged to the grab rod 1, is set as an inclined surface with the distance between it and the inner wall surface on the other side gradually increasing from the outside to the inside.

[0038] In this embodiment, the hook 2 is hinged to the pull rod 1 at the lower end of the hook groove 11. Therefore, the lower inner wall of the hook groove 11 is set as an inclined surface. The distance between the lower inner wall and the upper inner wall of the hook groove 11 gradually decreases from the outside to the inside. That is to say, the angle between the inclined surface and the right end face of the hook groove 11 is an acute angle, so that the angle between the hook 2 and the pull rod 1 when fully extended is less than 90°. When the workpiece 100 to be disassembled is pulled out, it has a radial clamping force to prevent shaking or even falling off, thus improving stability.

[0039] In one embodiment, the grabbing structure 30 further includes an adjustment component 3, which is telescopically disposed at the end of the grabbing rod 1 away from the grabbing hook groove 11, and is adapted to adjust the axial length of the grabbing structure 30.

[0040] In other words, the grabbing structure 30 includes a grabbing rod 1, a grabbing hook 2 hinged to the lower end of the grabbing rod 1, and an adjustment component 3 detachably and movablely disposed at the upper end of the grabbing rod 1. The adjustment component 3 is a telescopic structure with adjustable length, thereby realizing the length adjustment of the entire grabbing structure 30.

[0041] As an optional implementation method, such as Figure 1 and Figure 2 As shown, the adjustment assembly 3 includes: a first adjustment member 31, a second adjustment member 32, a third adjustment member 33, and a first locking member 34. The first adjustment member 31 has an internal thread at least one end; the second adjustment member 32 has an external thread, and the first end of the second adjustment member 32 engages with the internal thread of the first adjustment member 31 through the external thread; one end of the third adjustment member 33 has an internal thread, which is threadedly connected to the second end of the second adjustment member 32, and the other end of the third adjustment member 33 has a connecting groove 331. The end of the pull rod 1 away from the hook groove 11 is rotatably disposed in the connecting groove 331; the first locking member 34 is adapted to pass through the connecting groove 331 and the pull rod 1 to lock the pull rod 1 in the connecting groove 331.

[0042] Specifically, the first adjusting member 31 is a rod with internal threads. The internal threads can run through the entire first adjusting member 31 or only be set at a certain length at the lower end, as long as they can meet the requirements for adjusting the length by threaded connection with the second adjusting member 32. The second adjusting member 32 is a screw structure with external threads. The upper end of the second adjusting member 32 is threadedly connected to the first adjusting member 31, and the lower end is threadedly connected to the third adjusting member 33. The threads at both ends are screwed in and out to adjust the length of the entire adjusting assembly 3, thereby adjusting the length of the pull gripper structure 30. The connecting groove 331 at the lower end of the third adjusting member 33 is used to accommodate the upper end of the pull gripper rod 1. The upper end of the pull gripper rod 1 is rotatably set in the connecting groove 331, and the upper end of the pull gripper rod 1 is circumferentially provided with multiple locking holes. After rotating to a certain position, the first locking member 34 extends into the locking holes to fix the relative position of the pull gripper rod 1 and the adjusting assembly 3. In addition, when one hook 2 is damaged, the other hooks 2 can be used for locking by rotating the pull gripper rod 1. The adjustment component 3, used to adjust the length of the pull-grip structure 30, uses threaded adjustment between its various parts, which allows for quick and accurate adjustment and positioning, strong load-bearing capacity, and a compact structure.

[0043] As another alternative implementation, the adjustment component 3 can adopt a nested telescopic sleeve structure, and then use positioning bolts or screws to radially pass through different positions of the sleeve structure to achieve different lengths for adjustment and positioning. The structure is simple, easy to obtain, and easy to replace.

[0044] Example 2

[0045] like Figure 3 and Figure 4 As shown, this embodiment provides a puller device, including: a support structure, a mounting assembly 20, and a pull gripping structure 30 as in Embodiment 1. The mounting assembly 20 includes a mounting rod 201, which is movably mounted on the support structure. The pull gripping structure 30 is mounted on the mounting rod 201 and is adapted to move along the axial direction of the mounting rod 201. Under the action of an external force, the mounting rod 201 and the pull gripping structure 30 are adapted to move relative to the support structure.

[0046] Specifically, the support structure is fixedly set to provide stable support for the use of the puller device, facilitate the setting and longitudinal movement of the mounting rod 201, and the pull gripping structure 30 can move up and down along the axial direction of the mounting rod 201 to determine a suitable working position and fix it. The lower end of the pull gripping structure 30 is inserted into the workpiece to be disassembled until it locks the lower end of the workpiece to be disassembled 100. At this time, an external force is applied to the mounting rod 201, and the mounting rod 201 moves longitudinally stably on the support structure, driving the pull gripping structure 30 fixed on it to move longitudinally. Pulling the pull gripping structure 30 causes the workpiece to be disassembled 100 to detach.

[0047] The aforementioned puller device can provide a stable support point and force point when pulling out damaged workpieces 100 to be disassembled from some main bodies. The length of the pull gripping structure 30 is adjustable, and it firmly holds the workpieces 100 to be disassembled, with high reliability. The gripping hook 2 is telescopic and can be used for different small workpieces. A single pull gripping structure 30 is suitable for smaller bearings, while multiple pull gripping structures 30 can work together to work larger workpieces, with a wide range of applications and high flexibility.

[0048] In one embodiment, multiple pull-grip structures 30 are provided, spaced apart along the circumferential direction of the mounting rod 201, and hinged to the mounting rod 201. Multiple pull-grip structures 30 are movably arranged along the circumferential direction of the mounting rod 201, allowing them to extend into workpieces 100 of different sizes to be disassembled. Multiple pull-grip structures 30 act on the same workpiece 100, resulting in a circumferentially distributed pulling force, high stability, and improved disassembly efficiency. In this embodiment, three pull-grip structures 30 are provided, spaced 120° apart. In other embodiments, two or more can be provided relatively evenly, depending on the needs of the workpiece 100 to be disassembled.

[0049] The aforementioned mounting rod 201 has an external thread and is threadedly connected to the bracket structure. The end of the mounting rod 201 that is relatively far away from the pull-grab structure 30 is provided with a first through hole 2011. The first through hole 2011 is arranged in the radial direction of the mounting rod 201 and is suitable for setting an external force-applying structure to drive the mounting assembly 20 and the pull-grab structure 30 to move relative to the bracket structure.

[0050] After the grabbing structure 30 clamps the workpiece 100 to be disassembled, one end of the external force-applying structure, such as a steel rod or other rigid member, is inserted into the first through hole 2011, and force is applied to the other end to rotate it. This causes the mounting rod 201 to move longitudinally on the support structure, which in turn causes the grabbing structure 30 to move longitudinally, pulling the workpiece 100 out of the fixed structure. The required longitudinal pulling force is converted into a lateral rotational force. The horizontally extended external force-applying structure lengthens the force arm, thereby reducing the amount of force applied, making operation easy and convenient, and improving efficiency.

[0051] As an optional implementation method, such as Figure 3 and Figure 4 As shown, the mounting assembly 20 further includes: a connector 202, a second locking member 203, and a third locking member 204. The connector 202 has an internal thread and is movably mounted on the mounting rod 201. The pull-grip structure 30 is mounted on the connector 202. Along the axial direction of the mounting rod 201, the second locking member 203 and the third locking member 204 are respectively disposed on both sides of the connector 202. The second locking member 203 and the third locking member 204 have internal threads and are movably mounted on the mounting rod 201. The mounting assembly 20 has the second locking member 203 and the third locking member 204 facing each other or moving away from each other to lock or release the connector 202 on the mounting rod 201.

[0052] The connector 202 includes a body 2021 connected to the mounting rod 201, and a plurality of extensions 2022 spaced circumferentially around the body 2021 and extending radially along the body 2021. The extensions 2022 connect to the gripping structures 30 and provide ample space between the gripping structures 30 for workpieces with significant impact. The extensions 2022 are hinged to the upper end of the gripping structures 30, offering high flexibility. The connector 202 can slide on the mounting rod 201, thus achieving axial movement. After moving to a predetermined position, the second locking member 203 and the third locking member 204 on the upper and lower parts of the connector 1011 move relative to each other, clamping and fixing the connector 202 in a predetermined position on the mounting rod 201, facilitating installation. The rod 201 stably drives the connecting piece 202 and the grabbing structure 30 to move longitudinally. When the pulling is finished and work needs to be resumed, the second locking piece 203 and the third locking piece 204 rotate in opposite directions, moving away from the connecting piece 202 to facilitate the adjustment of the connecting piece 202 on the mounting rod 201. Simultaneously, the third locking piece 204 also serves as a force-bearing support point for the connecting piece 202 when it is adjusted downwards, preventing it from falling off. The connecting piece 202 can be threaded onto the mounting rod 201 to enhance its stability, or it can simply be fitted onto the mounting rod 201 without threads and secured by the second locking piece 203 and the third locking piece 204. If one of the grabbing structures 30 is damaged, the other grabbing structure 30 can be rotated by rotating the connecting piece 202 to continue operation, improving efficiency. The second locking element 203 and the third locking element 204 clamp and lock the connecting element 202 from the top and bottom by means of thread adjustment, which has high stability.

[0053] As another alternative implementation, the movement and fixation of the connector 202 on the mounting rod 201 can also be directly achieved by a sleeve sliding and positioning pin locking structure, as long as the relative movement and fixation of the connector 202 and the mounting rod 201 can be realized, which facilitates the height adjustment of the pull gripping structure 30.

[0054] In one embodiment, such as Figure 3 As shown, the support structure includes: a first support rod 101 and at least two second support rods 102. The mounting rod 201 is movably disposed on the first support rod 101. One end of the second support rod 102 is slidably disposed on the first support rod 101, and the other end is adapted to be fixed to the base to support the first support rod 101. At least two second support rods 102 are located on both sides of the first support rod 101. The second support rod 102 includes at least two nested telescopic parts to adjust the length of the second support rod 102.

[0055] The first support rod 101 has a multi-segment structure, including a connecting rod 1011 located in the middle. The connecting rod 1011 has a second through hole 1011a with internal threads running vertically through it, and a first connecting hole 1011b and a second connecting hole 1011c on the left and right sides. The second through hole 1011a is used to thread-connect the mounting rod 201. The first connecting hole 1011b and the second connecting hole 1011c are used to connect the first rod 1012 and the second rod 1013 on the left and right sides, respectively. The first rod 1012, the connecting rod 1011 and the second rod 1013 are connected in sequence to form the horizontal first support rod 101. At the same time, the ends of the first rod 1012 and the second rod 1013 away from the connecting rod 1011 are provided with limit parts 1014 to prevent the second support rod 102, which is slidably mounted on the first rod 1012 and the second rod 1013, from falling out. In this embodiment, two second support rods 102 are provided, respectively mounted on the first rod 1012 and the second rod 1013. Each second support rod 102 includes a first telescopic part 1021, a second telescopic part 1022, and a support body 1023 from top to bottom. The first telescopic part 1021 has external threads, and the second telescopic part has internal threads. The upper end of the first telescopic part 1021 is slidably sleeved on the first support rod 101, and the lower end of the first telescopic part 1021 is threadedly connected to the second telescopic part to adjust the height of the second support rod 102. Of course, the first telescopic part 1021 and the second telescopic part 1022 may also be without threads, and can be extended and retracted by fitting together, and then locked in place by radial bolts, etc. The support body 1023 is located at the lower end of the second telescopic part 1022. The cross-section of the end of the support body 1023 away from the second telescopic part 1022 is larger than the cross-section of the second telescopic part 1022, which is used to facilitate the stabilization of the position of the second support rod 102.

[0056] Two vertical second support rods 102 slide relative to each other on a horizontal first support rod 101. The space between the two second support rods 102 is adjustable, which is suitable for placing equipment of different sizes for disassembling workpieces. At the same time, the adjustable second support rods 102 also facilitates the installation of the entire puller device in different spaces.

[0057] Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Although embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A pull tab structure, characterized by, include: A grab bar (1) is provided at least two grab hook grooves (11) spaced apart along the circumferential direction at one end of the grab bar (1), and any one of the grab hook grooves (11) extends along the axial direction of the grab bar (1). At least two hooks (2) are provided corresponding to at least two of the grab slots; one end of any hook (2) is hinged to the grab rod (1) so that the hook (2) opens and closes within a preset angle range relative to the axial direction of the grab rod (1); under the action of external force, the grab structure (30) is adapted to pull the workpiece to be disassembled (100) off by grabbing the workpiece to be disassembled (100) by the hook (2).

2. The pull grab structure of claim 1, wherein The preset angle between the axial direction of the grab hook (2) and the grab rod (1) is in the range of 0° to 90°.

3. The pull grab structure of claim 1, wherein, In the axial direction of the grab rod (1), the inner wall surface of the grab hook groove (11) that is relatively close to the end of the grab hook (2) that is hinged to the grab rod (1) is set as an inclined surface with the distance between it and the inner wall surface on the other side gradually increasing from the outside to the inside.

4. The pull grab structure of claim 1, wherein Also includes: Adjustment component (3), which is telescopically disposed at one end of the grab rod (1) away from the grab groove (11), is adapted to adjust the axial length of the grab structure (30).

5. The pull grab structure of claim 4, wherein, The adjustment component (3) includes: The first adjusting member (31) has an internal thread formed at least one end; The second adjusting member (32) is formed with an external thread, and the first end of the second adjusting member (32) is engaged with the internal thread of the first adjusting member (31) through the external thread; The third adjusting member (33) has an internal thread at one end, which is threaded to the second end of the second adjusting member (32); the other end of the third adjusting member (33) has a connecting groove (331), and the end of the pull rod (1) away from the hook groove (11) is rotatably disposed in the connecting groove (331). A first locking member (34) is adapted to pass through the connecting groove (331) and the pull rod (1) to lock the pull rod (1) in the connecting groove (331).

6. A drawbench apparatus characterized by, include: Support structure; Mounting assembly (20), the mounting assembly (20) including mounting rod (201) movably mounted on the bracket structure; The grabbing structure (30) according to any one of claims 1 to 5 is disposed on the mounting rod (201) and is adapted to move along the axial direction of the mounting rod (201); under the action of an external force, the mounting rod (201) and the grabbing structure (30) are adapted to move relative to the support structure.

7. The draw ram apparatus of claim 6, wherein Multiple pull-grip structures (30) are provided, spaced apart along the circumferential direction of the mounting rod (201), and hinged to the mounting rod (201).

8. The draw ram apparatus of claim 6, wherein, The mounting rod (201) has external threads and is threadedly connected to the bracket structure; The mounting rod (201) has a first through hole (2011) at the end that is away from the grabbing structure (30). The first through hole (2011) is arranged in the radial direction of the mounting rod (201) and is suitable for setting an external force-applying structure to drive the mounting assembly (20) and the grabbing structure (30) to move relative to the bracket structure.

9. The draw ram apparatus of claim 8, wherein, The mounting component (20) also includes: A connector (202) having an internal thread is movably disposed on the mounting rod (201); the pull-grip structure (30) is mounted on the connector (202); The second locking member (203) and the third locking member (204) are respectively disposed on both sides of the connector (202) along the axial direction of the mounting rod (201); the second locking member (203) and the third locking member (204) have internal threads and are movably disposed on the mounting rod (201); the mounting assembly (20) has the second locking member (203) and the third locking member (204) facing each other or moving away to lock or release the connector (202) on the mounting rod (201).

10. The draw ram assembly of claim 6, wherein, The support structure includes: The first support rod (101) is provided, and the mounting rod (201) is movably disposed on the first support rod (101); At least two second support rods (102) are provided, one end of which is slidably disposed on the first support rod (101), and the other end is adapted to be fixed to the base to support the first support rod (101). The at least two second support rods (102) are located on both sides of the first support rod (101). The second support rod (102) includes at least two telescopic parts nested together to adjust the length of the second support rod (102).

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