Puller device for disassembling bearing

Abstract

The utility model provides a puller device for disassembling a bearing. The puller device comprises a cross beam, a first pull rod, a second pull rod, an expansion rod and a supporting structure, wherein the cross beam is provided with a first mounting position and a second mounting position, and a dismounting screw rod is screwed on the cross beam; the first pull rod is mounted in the first mounting position and is provided with a first clamping jaw; the second pull rod is mounted in the second mounting position and is provided with a second clamping jaw; the expansion rod can drive the first clamping jaw and the second clamping jaw to move in the direction away from or close to each other. The supporting structure is used for supporting the dismounting screw. During use, the supporting structure is fixedly placed, and then the positions of the first pull rod and the second pull rod are adjusted; and after adjustment is completed, the expansion piece is rotated, the first clamping jaw and the second clamping jaw tightly hold and fix the bearing, then the dismounting screw rod is rotated downwards to apply pressure to the supporting structure, and the first pull rod and the second pull rod move upwards to pull out the bearing. The puller device disclosed by the utility model can be flexibly adjusted according to the size of the bearing, and is wide in application range.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing dismounting technical field, concretely relates to a puller device for dismounting bearing. BACKGROUND

[0002] In the automobile manufacturing and assembly process, bearings are widely used in engine, transmission system, steering system, suspension system and wheel and other key parts. In the engine, the crankshaft bearing, connecting rod bearing and the like are used to support and guide the movement of rotating parts, which can reduce friction and wear, and improve the overall efficiency and life of the engine; in the transmission system, the gearbox bearing, differential bearing and the like can ensure the accuracy and stability of power transmission, and improve the acceleration performance and driving stability of the automobile.

[0003] In the field of automobile maintenance, the inspection, maintenance and replacement of bearings are an important part of daily maintenance. With the growth of the use time of the automobile, the bearings may cause problems such as abnormal noise, vibration aggravation or unstable driving due to wear, corrosion or overheating and the like; therefore, regular inspection of the bearings, timely discovery and replacement of damaged bearings are of great significance to the safety of the automobile and the driver. In the process of replacing the bearing, the old bearing needs to be dismounted from the installation position first, and then a new bearing is installed; the existing equipment for dismounting the bearing is fixed first when in use, then the pressing piece is turned downward to apply downward pressure through the pressing piece, so that the clamping jaw expands outward and tightly holds the bearing; after the bearing is tightly held, the nut is turned downward by the wrench, the nut generates downward pressure, and the bearing is pulled out by the clamping jaw; the problem of the existing equipment is that the clamping jaw is expanded by the pressing piece, the expansion range of the clamping jaw is limited, and only bearings of specific sizes can be adapted, which limits the application range and flexibility of the equipment; in addition, the pressing piece is between the three clamping jaws, and the space is small, which is inconvenient to operate.

[0004] Therefore, how to design a puller device for dismounting bearings with a larger application range, higher flexibility and simple and convenient operation is a technical problem that has not been solved in the prior art. UTILITY MODEL CONTENTS

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the technical defects that the expansion range of the clamping jaw of the existing equipment is limited, only bearings of specific sizes can be adapted, the application range is narrow and the operation is inconvenient, so as to provide a puller device for dismounting bearings with a larger application range, higher flexibility and simple and convenient operation.

[0006] Therefore, the utility model provides a puller device for dismounting bearings, which comprises:

[0007] The beam has at least one first mounting position and at least one second mounting position arranged opposite to the first mounting position; a dismounting screw is screwed on the beam, the free end of the dismounting screw penetrates through the beam upwardly and extends to the outside, and a rotating rod is arranged at the top position;

[0008] A first pull rod is adjustably arranged at the top in the first mounting position, the bottom of the first pull rod is formed with a first clamping jaw, and a first opening and closing movable piece is arranged on the first pull rod, and the first opening and closing movable piece can automatically adjust the inclination angle relative to the first pull rod;

[0009] A second pull rod is adjustably arranged at the top in the second mounting position, the bottom of the second pull rod is formed with a second clamping jaw, and a second opening and closing movable piece is arranged on the second pull rod, and the second opening and closing movable piece can automatically adjust the inclination angle relative to the second pull rod;

[0010] An expansion rod is screwed with the first opening and closing movable piece and the second opening and closing movable piece, and rotating the expansion rod can drive the first clamping jaw and the second clamping jaw to move in the direction of moving away from each other or moving close to each other;

[0011] A support structure is arranged for supporting the dismounting screw, so that rotating the dismounting screw can drive the first pull rod and the second pull rod to move upwardly.

[0012] As a preferred scheme, the first mounting position is three, which are arranged at a certain distance on the beam; the second mounting position is three, which are arranged opposite to the three first mounting positions on the beam.

[0013] As a preferred scheme, the first mounting position comprises a first opening portion and a first limiting portion in communication with the first opening portion;

[0014] The top of the first pull rod is provided with two first connecting pieces, the first connecting holes are oppositely arranged on the two first connecting pieces, a first connecting shaft penetrates through the first connecting holes and is arranged in the first limiting portion, so that the first pull rod is arranged in the first mounting position.

[0015] As a preferred scheme, the second mounting position comprises a second opening portion and a second limiting portion in communication with the second opening portion;

[0016] The top of the second pull rod is provided with two second connecting pieces, the second connecting holes are oppositely arranged on the two second connecting pieces, a second connecting shaft penetrates through the second connecting holes and is arranged in the second limiting portion, so that the second pull rod is arranged in the second mounting position.

[0017] As a preferred solution, the first opening and closing movable piece is provided with a first internally threaded through hole, and a first externally threaded part is arranged on an outer wall of one end of the expansion rod, and the one end of the expansion rod is screw-connected with the first opening and closing movable piece; the second opening and closing movable piece is provided with a second internally threaded through hole, and a second externally threaded part is arranged on an outer wall of the other end of the expansion rod, and the other end of the expansion rod is screw-connected with the second opening and closing movable piece.

[0018] The first externally threaded part and the second externally threaded part are arranged in opposite directions.

[0019] As a preferred solution, the first opening and closing movable piece is mounted on the first pull rod through a first mounting structure.

[0020] The first mounting structure comprises:

[0021] A first mounting cavity is arranged through the first pull rod, and first threaded through holes are arranged on both sides of the first mounting cavity;

[0022] First blind holes are arranged on both sides of the first opening and closing movable piece opposite to the first threaded through holes;

[0023] A first rotating bolt is arranged with an externally threaded part on a part away from a free end; the first opening and closing movable piece is mounted in the first mounting cavity, the first rotating bolt is screw-connected with the first threaded through holes, and the free end extends into the first blind hole, so that the first opening and closing movable piece is rotatably and adjustably mounted on the first pull rod.

[0024] As a preferred solution, the second opening and closing movable piece is mounted on the second pull rod through a second mounting structure.

[0025] The second mounting structure comprises:

[0026] A second mounting cavity is arranged through the second pull rod, and second threaded through holes are arranged on both sides of the second mounting cavity;

[0027] Second blind holes are arranged on both sides of the second opening and closing movable piece opposite to the second threaded through holes;

[0028] A second rotating bolt is arranged with an externally threaded part on a part away from a free end; the second opening and closing movable piece is mounted in the second mounting cavity, the second rotating bolt is screw-connected with the second threaded through holes, and the free end extends into the second blind hole, so that the second opening and closing movable piece is rotatably and adjustably mounted on the second pull rod.

[0029] As a preferred solution, the support structure comprises:

[0030] The first supporting rod is arranged crosswise with the crossbeam, and a limiting hole is arranged on the top surface of the first supporting rod, and the bottom of the dismounting screw rod can be rotatably placed in the limiting hole;

[0031] The second supporting rod is movably sleeved on one end of the first supporting rod.

[0032] The third supporting rod is movably sleeved on the other end of the first supporting rod.

[0033] As a preferred solution, a first fixing through hole is arranged on the top of the second supporting rod, a second screw is screwed with the first fixing through hole, and can be rotated inward to abut against the first supporting rod, thereby limiting and fixing the second supporting rod;

[0034] A second fixing through hole is arranged on the top of the third supporting rod, and a third screw is screwed with the second fixing through hole, and can be rotated inward to abut against the first supporting rod, thereby limiting and fixing the third supporting rod.

[0035] As a preferred solution, a first arc-shaped limiting flange is formed on the bottom of the second supporting rod, the top end surface of the first arc-shaped limiting flange is an arc surface, and an anti-skid texture is arranged on the top end surface;

[0036] A second arc-shaped limiting flange is formed on the bottom of the third supporting rod, the top end surface of the second arc-shaped limiting flange is an arc surface, and an anti-skid texture is arranged on the top end surface.

[0037] The technical scheme provided by the utility model has the following advantages:

[0038] The utility model discloses a puller device for dismounting bearing, including crossbeam, first pull rod, second pull rod, expansion rod and support structure, wherein crossbeam has at least one first installation site, and with first installation site opposite at least one second installation site, the free end of dismounting screw rod is upwards through crossbeam and extends to the outside, and the rotating rod is installed at the top position, the first pull rod top adjustable installation is in first installation site, and the bottom is formed with first clamping jaw, and first pull rod is installed with first open and close movable part, and first open and close movable part can relative to first pull rod automatic adjustment inclination angle, the second pull rod top adjustable installation is in second installation site, and the bottom is formed with second clamping jaw, and second pull rod is installed with second open and close movable part, and second open and close movable part can relative to second pull rod automatic adjustment inclination angle, expansion rod is screwed with first open and close movable part and second open and close movable part, and the rotation expansion rod can drive first clamping jaw and second clamping jaw move to the direction of mutually far away or mutually close, and support structure is used for supporting dismounting screw rod, so that rotating dismounting screw rod can drive first pull rod and second pull rod move upwards.

[0039] When the puller device for disassembling bearing of the utility model is used, first, the supporting structure is fixed on the outer wall of the bearing installation position, then the first pull rod is adjusted to the appropriate first installation position according to the size of the bearing size, and the second pull rod is adjusted to the appropriate second installation position; after the adjustment is completed, the expansion piece is rotated, the first clamping jaw and the second clamping jaw are moved in the direction of moving away from each other, and the bearing is tightly fixed; after the bearing is tightly fixed, the disassembly screw is rotated downward, the downward pressure is applied to the supporting structure through the disassembly screw, the first pull rod and the second pull rod are moved upward under the action of the force, and the bearing is pulled out from the installation position. The puller device for disassembling bearing of the utility model can be flexibly adjusted according to the size of the bearing size, the adaptation problem of the fixed specification tool is avoided, the application range is wider; in addition, the puller device of the utility model can drive the first clamping jaw and the second clamping jaw to move in the direction of moving away from each other by operating one end of the expansion rod, and then the bearing is tightly fixed, so that the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical scheme in the prior art or the embodiment of the utility model, the drawings used in the description of the prior art or the embodiment will be briefly introduced.

[0041] Figure 1 It is the schematic view of placing the puller device of the utility model on the bearing installation position.

[0042] Figure 2 It is the overall structure schematic view of the puller device for disassembling bearing of the utility model.

[0043] Figure 3 It is the exploded schematic view of the supporting structure in Figure 2

[0044] Figure 4 It is the exploded schematic view of the first pull rod and the second pull rod in Figure 2

[0045] Figure 5 It is the exploded structure schematic view of Figure 2

[0046] ​​​Label: 1, crossbeam; 11, first mounting position; 12, second mounting position; 13, dismounting screw; 14, rotating rod; 15, first opening part; 16, first limiting part; 17, second opening part; 18, second limiting part; 2, first pull rod; 21, first clamping jaw; 22, first connecting sheet; 23, first connecting through hole; 24, first connecting shaft; 3, first opening and closing movable piece; 31, first internal thread through hole; 4, second pull rod; 41, second clamping jaw; 42, second connecting sheet; 43, second connecting through hole; 44, second connecting shaft; 5, second opening and closing movable piece; 51, second internal thread through hole; 6, expanding rod; 7, first mounting cavity; 71, first thread through hole; 72, first blind hole; 73, first rotating bolt; 74, second mounting cavity; 75, second thread through hole; 76, second blind hole; 77, second rotating bolt; 8, first supporting rod; 81, limiting hole; 82, second supporting rod; 83, third supporting rod; 84, first fixed through hole; 85, second bolt; 86, second fixed through hole; 87, third bolt; 88, first arc-shaped limiting flange; 89, second arc-shaped limiting flange. DETAILED DESCRIPTION

[0047] In order to make the skilled in the art better understand the present application, the following will be combined with the drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the embodiments obtained by the skilled in the art without making creative labor should belong to the scope of protection of the present application.

[0048] It should be noted that the terms "first", "second" and the like in the claims and the description of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not limited to those clearly listed steps or units, but can also include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0050] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0051] This embodiment provides a puller device for disassembling bearings, such as... Figures 1-5 As shown, the structure includes: a crossbeam 1, a first tie rod 2, a second tie rod 4, an expansion rod 6, and a support structure; wherein, the crossbeam 1 has at least one first mounting position 11 and at least one second mounting position 12 opposite to the first mounting position 11; a disassembly screw 13 is screwed onto the crossbeam 1, the free end of the disassembly screw 13 passes upward through the crossbeam 1 and extends to the outside, and a rotating rod 14 is installed at the top position; the top of the first tie rod 2 is adjustablely installed in the first mounting position 11, and a first claw 21 is formed at the bottom; a first opening and closing movable member 3 is installed on the first tie rod 2, and the first opening and closing movable member 3 can automatically adjust relative to the first tie rod 2. The second pull rod 4 is adjustablely mounted at the top within the second mounting position 12, and has a second claw 41 formed at the bottom. A second opening / closing movable part 5 is mounted on the second pull rod 4, and the second opening / closing movable part 5 can automatically adjust its tilt angle relative to the second pull rod 4. The expansion rod 6 is screwed to the first opening / closing movable part 3 and the second opening / closing movable part 5. Rotating the expansion rod 6 can drive the first claw 21 and the second claw 41 to move in a direction away from or close to each other. The support structure is used to support the disassembly screw 13, so that rotating the disassembly screw 13 can drive the first pull rod 2 and the second pull rod 4 to move upward.

[0052] In use of the puller device for dismounting bearing of the embodiment, the support structure is first fixed on the outer wall of the bearing installation position, then the first pull rod 2 is adjusted to the appropriate first installation position 11 and the second pull rod 4 is adjusted to the appropriate second installation position 12 according to the size of the bearing; after the adjustment, the expansion piece 6 is rotated to move the first clamping jaw 21 and the second clamping jaw 41 away from each other and tightly hold the bearing; after the bearing is tightly held, the dismounting screw 13 is rotated downward to apply downward pressure on the support structure by the dismounting screw 13, so that the first pull rod 2 and the second pull rod 4 move upward under the action of force, thereby pulling the bearing out of the installation position. The puller device for dismounting bearing of the embodiment can be flexibly adjusted according to the size of the bearing, avoiding the adaptation problem of fixed specification tools, and has a wide application range.

[0053] The first installation position 11 is three, which are arranged on the cross beam 1 at a certain distance apart; the second installation position 12 is three, which are arranged on the cross beam 1 opposite to the three first installation positions 11. When applied to bearings of different sizes, the pull rod can be installed in the appropriate installation position according to the specific size of the bearing, thereby further widening the application range and the application range.

[0054] As shown in Figure 3 The first installation position 11 includes a first opening part 15 and a first limiting part 16 communicating with the first opening part 15; the top of the first pull rod 2 is provided with two first connecting plates 22, and first connecting through holes 23 are oppositely arranged on the two first connecting plates 22; a first connecting shaft 24 passes through the first connecting through holes 23 and is installed in the first limiting part 16, thereby installing the first pull rod 2 in the first installation position 11.

[0055] The second installation position 12 includes a second opening part 17 and a second limiting part 18 communicating with the second opening part 17; the top of the second pull rod 4 is provided with two second connecting plates 42, and second connecting through holes 43 are oppositely arranged on the two second connecting plates 42; a second connecting shaft 44 passes through the second connecting through holes 43 and is installed in the second limiting part 18, thereby installing the second pull rod 4 in the second installation position 12.

[0056] The first opening and closing movable piece 3 is provided with a first internally threaded through hole 31, and the outer wall of one end of the expansion rod 6 is provided with a first external thread, and the one end of the expansion rod 6 can be screwed with the first opening and closing movable piece 3; the second opening and closing movable piece 5 is provided with a second internally threaded through hole 51, and the outer wall of one end of the expansion rod 6 is provided with a second external thread, and the other end of the expansion rod 6 can be screwed with the second opening and closing movable piece 5; the screw thread directions of the first external thread and the second external thread are opposite, so that when the expansion rod 6 is rotated, the first pull rod 2 and the second pull rod 4 can move towards the direction of moving away from each other or moving close to each other.

[0057] As shown in Figure 4 The first opening and closing movable piece 3 is installed on the first pull rod 2 through a first mounting structure; the first mounting structure includes a first mounting cavity 7, a first blind hole 72 and a first rotating bolt 73; wherein the first mounting cavity 7 is throughly provided on the first pull rod 2, and the two sides of the first mounting cavity 7 are provided with first threaded through holes 71; the first blind hole 72 is provided on the two sides of the first opening and closing movable piece 3 opposite to the first threaded through holes 71; the part of the first rotating bolt 73 away from the free end is provided with an external thread; the first opening and closing movable piece 3 is installed in the first mounting cavity 7, the first rotating bolt 73 is screwed with the first threaded through holes 71, and the free end extends into the first blind hole 72, so that the first opening and closing movable piece 3 is rotatably adjusted and installed on the first pull rod 2.

[0058] The second opening and closing movable piece 5 is installed on the second pull rod 4 through a second mounting structure; the second mounting structure includes a second mounting cavity 74, a second blind hole 76 and a second rotating bolt 77; wherein the second mounting cavity 74 is throughly provided on the second pull rod 4, and the two sides of the second mounting cavity 74 are provided with second threaded through holes 75; the second blind hole 76 is provided on the two sides of the second opening and closing movable piece 5 opposite to the second threaded through holes 75; the part of the second rotating bolt 77 away from the free end is provided with an external thread; the second opening and closing movable piece 5 is installed in the second mounting cavity 74, the second rotating bolt 77 is screwed with the second threaded through holes 75, and the free end extends into the second blind hole 76, so that the second opening and closing movable piece 5 is rotatably adjusted and installed on the second pull rod 4.

[0059] As shown in Figure 5As shown, the support structure comprises a first support rod 8, a second support rod 82 and a third support rod 83; wherein the first support rod 8 is arranged crosswise with the crossbeam 1, and a limiting hole 81 is arranged on the top surface, and the bottom of the dismounting screw 13 can be rotatably placed in the limiting hole 81; the second support rod 82 is movably sleeved on one end of the first support rod 8; and the third support rod 83 is movably sleeved on the other end of the first support rod 8. The limiting hole 81 is used for limiting the position of the dismounting screw 13, preventing the dismounting screw 13 from shifting when being rotated downward, and increasing the operation difficulty.

[0060] A first fixing through hole 84 is arranged on the top of the second support rod 82, a second screw 85 is screwed with the first fixing through hole 84, and can be rotated inward and abut against the first support rod 8, so as to limit and fix the second support rod 82; and a second fixing through hole 86 is arranged on the top of the third support rod 83, a third screw 87 is screwed with the second fixing through hole 86, and can be rotated inward and abut against the first support rod 8, so as to limit and fix the third support rod 83. When the support structure is fixed, according to the size of the bearing installation position, the second support rod 82 is adjusted to an appropriate position, the third support rod 83 is adjusted to an appropriate position, and then the support structure is fixed and installed, which is used for subsequent dismounting bearing operation.

[0061] Reference Figure 1 As shown, the bottom of the second support rod 82 is formed with a first limiting flange 88, the inner side surface of the first limiting flange 88 is an arc surface, and anti-skid textures are arranged on the arc surface; the bottom of the third support rod 83 is formed with a second limiting flange 89, the inner side surface of the second limiting flange 89 is an arc surface, and anti-skid textures are arranged on the arc surface; when the bearing is dismounted, the inner side surfaces of the first limiting flange 88 and the second limiting flange 89 can be tightly held on the outer wall of the circular cavity for installing the bearing, and the stability is better.

[0062] As a variant design scheme (not shown in the figure), the bottom of the second support rod 82 is formed with a first arc-shaped limiting flange 88, the top end surface of the first arc-shaped limiting flange 88 is an arc surface, and anti-skid textures are arranged on the arc top end surface; the bottom of the third support rod 83 is formed with a second arc-shaped limiting flange 89, the top end surface of the second arc-shaped limiting flange 89 is an arc surface, and anti-skid textures are arranged on the arc top end surface. When the bearing is dismounted, the top end surface of the first arc-shaped limiting flange 88 is abutted against one side of the outer end surface of the circular cavity for installing the bearing, and the top end surface of the second arc-shaped limiting flange 89 is abutted against the other side of the outer end surface of the circular cavity for installing the bearing. The design of the arc top end surface makes the puller device of the utility model applicable to the dismounting of most bearings, and the application range is wider.

[0063] The arc-shaped limiting flange is matched with the outer wall of the bearing installation position, and can be more stable during installation.

[0064] The method for using the puller device for disassembling bearings in the embodiment is as follows: when the puller device for disassembling bearings in the embodiment is used, first, the support structure is fixed on the outer wall of the bearing installation position, specifically, the second support rod 82 is adjusted to an appropriate position according to the size of the bearing installation position, and the second support rod 82 is fixed by the second bolt 85, and the third support rod 83 is adjusted to an appropriate position, and the third support rod 83 is fixed by the third bolt 87; when the support structure is installed, the first pull rod 2 is adjusted to the appropriate first installation position 11 according to the size of the bearing, and the second pull rod 4 is adjusted to the appropriate second installation position 12; after adjustment, the expansion piece 6 is rotated, the first clamping jaw 21 and the second clamping jaw 41 are moved away from each other, and the bearing is tightly fixed; after the bearing is tightly fixed, the disassembly screw 13 is rotated downward by rotating the rod 14, the downward pressure is applied to the limiting hole 81 on the first support rod 8 by the disassembly screw 13, the first pull rod 2 and the second pull rod 4 are moved upward under the action of the force, and the bearing is pulled out from the installation position.

[0065] Obviously, the above embodiment is only an example for clearly illustrating, and is not a limitation to the embodiments. Other different forms of changes or variations can be made on the basis of the above description for those skilled in the art. All the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the technical scheme.

Claims

1. A puller device for dismounting a bearing, characterized in that The utility model relates to a kind of adjustable support structure, including: Beam (1), with at least one first installation site (11), and with the first installation site (11) opposite at least one second installation site (12) is arranged;The beam (1) is screwed with disassembly screw rod (13), the free end of the disassembly screw rod (13) is upwards through the beam (1) and extends to outside, and rotating rod (14) is installed at top position; First pull rod (2), top adjustable installation is in the first installation site (11), bottom is shaped with first claw (21), first pull rod (2) is installed with first open-close movable element (3), and first open-close movable element (3) can be automatically adjusted inclination angle relative to first pull rod (2); Second pull rod (4), top adjustable installation is in the second installation site (12), bottom is shaped with second claw (41), second pull rod (4) is installed with second open-close movable element (5), and second open-close movable element (5) can be automatically adjusted inclination angle relative to second pull rod (4); Expansion rod (6) is screwed with the first open-close movable element (3) and the second open-close movable element (5), and rotating expansion rod (6) can drive first claw (21) and second claw (41) move towards the direction of mutual far away or mutual close; Support structure is used to support the disassembly screw rod (13), so that rotating the disassembly screw rod (13) can drive first pull rod (2) and second pull rod (4) move upwards.

2. The puller apparatus for disassembling a bearing of claim 1, wherein: The first installation site (11) is three, and is arranged at a certain distance on the beam (1) respectively;The second installation site (12) is three, and is arranged on the beam (1) opposite to the three first installation sites (11) respectively.

3. The puller apparatus for disassembling a bearing of claim 1, wherein: The first installation site (11) includes first opening part (15) and first limiting part (16) communicated with the first opening part (15); The top of the first pull rod (2) is provided with two first connecting pieces (22), and first connecting through holes (23) are oppositely formed in the two first connecting pieces (22), and first connecting shafts (24) pass through the first connecting through holes (23) and are installed in the first limiting part (16), so that the first pull rod (2) is installed in the first installation site (11).

4. The puller apparatus for disassembling a bearing of claim 1, wherein: The second installation site (12) includes second opening part (17) and second limiting part (18) communicated with the second opening part (17); The top of the second pull rod (4) is provided with two second connecting pieces (42), and second connecting through holes (43) are oppositely formed in the two second connecting pieces (42), and second connecting shafts (44) pass through the second connecting through holes (43) and are installed in the second limiting part (18), so that the second pull rod (4) is installed in the second installation site (12).

5. The puller apparatus for disassembling a bearing of claim 1, wherein: The first opening and closing movable part (3) is provided with a first internally threaded through hole (31), one end of the expansion rod (6) is provided with a first externally threaded wall, and the one end of the expansion rod (6) is screw-connected with the first opening and closing movable part (3); the second opening and closing movable part (5) is provided with a second internally threaded through hole (51), one end of the expansion rod (6) is provided with a second externally threaded wall, and the one end of the expansion rod (6) is screw-connected with the second opening and closing movable part (5). The first externally threaded wall and the second externally threaded wall are provided in opposite directions.

6. The puller apparatus for disassembling a bearing of claim 1, wherein: The first opening and closing movable part (3) is installed on the first pull rod (2) through a first mounting structure. The first mounting structure comprises: A first mounting cavity (7) is provided through the first pull rod (2), and first threaded through holes (71) are provided on both sides of the first mounting cavity (7); First blind holes (72) are provided on both sides of the first opening and closing movable part (3) opposite to the first threaded through holes (71); A first rotating bolt (73) is provided with an externally threaded wall on a part away from a free end; the first opening and closing movable part (3) is installed in the first mounting cavity (7), the first rotating bolt (73) is screw-connected with the first threaded through holes (71), and the free end is inserted into the first blind holes (72), so that the first opening and closing movable part (3) is rotatably and adjustably installed on the first pull rod (2).

7. The puller apparatus for disassembling a bearing of claim 1, wherein: The second opening and closing movable part (5) is installed on the second pull rod (4) through a second mounting structure. The second mounting structure comprises: A second mounting cavity (74) is provided through the second pull rod (4), and second threaded through holes (75) are provided on both sides of the second mounting cavity (74); Second blind holes (76) are provided on both sides of the second opening and closing movable part (5) opposite to the second threaded through holes (75); A second rotating bolt (77) is provided with an externally threaded wall on a part away from a free end; the second opening and closing movable part (5) is installed in the second mounting cavity (74), the second rotating bolt (77) is screw-connected with the second threaded through holes (75), and the free end is inserted into the second blind holes (76), so that the second opening and closing movable part (5) is rotatably and adjustably installed on the second pull rod (4).

8. The puller apparatus for disassembling a bearing of claim 1, wherein, The support structure comprises: A first support rod (8) is provided crosswise with the cross beam (1), and a limiting hole (81) is provided on a top surface, and a bottom part of the dismounting screw rod (13) can be rotatably placed in the limiting hole (81); A second support rod (82) is movably sleeved on one end of the first support rod (8); A third support rod (83) is movably sleeved on the other end of the first support rod (8).

9. The puller apparatus for disassembling a bearing of claim 8, wherein: A first fixing through hole (84) is provided on a top part of the second support rod (82), a second bolt (85) is screw-connected with the first fixing through hole (84), and can be inwardly rotated and abutted with the first support rod (8), so that the second support rod (82) is limited and fixed. The top of the third supporting rod (83) is provided with a second fixing through hole (86), a third bolt (87) is screwed with the second fixing through hole (86) and can rotate inward and abut against the first supporting rod (8), thereby limiting and fixing the third supporting rod (83).

10. The puller apparatus for disassembling a bearing of claim 8, wherein: The bottom of the second supporting rod (82) is formed with a first arc-shaped limiting flange (88), the top end surface of the first arc-shaped limiting flange (88) is an arc surface, and the top end surface is provided with anti-skid textures. The bottom of the third supporting rod (83) is formed with a second arc-shaped limiting flange (89), the top end surface of the second arc-shaped limiting flange (89) is an arc surface, and the top end surface is provided with anti-skid textures.

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