A hydraulic puller

Abstract

The invention discloses a hydraulic puller, which solves the problem of the single application range of the existing pullers through a lifting device and an adjusting device; by adjusting the height of the bottom plate in the Z direction by a driving component, it can be applicable to the disassembly of rolling bearings with different installation heights and different diameters, ensuring that the puller component is coaxially arranged with the rolling bearing to be disassembled; by adjusting the distance between the main nut seat and the auxiliary nut seat by an adjusting device, the height of the first nut seat is adjusted, so that the movable bearings of different diameters can be installed on pull plates of different diameters, and the working range is greatly improved. Through the detachable connection between the main pull rod, the auxiliary pull rod, the first pull rod and the pull plate, the detachable connection between the main pull rod and the main nut seat, the first pull rod and the first nut seat, and the second pull rod and the second nut seat, the versatility is greatly improved, and the required pull rods and pull plates can be replaced according to actual conditions, and the flexibility is greatly improved.

Description

Technical Field

[0001] The present invention particularly relates to a hydraulic puller. Background Art

[0002] Pullers are tools frequently used in mechanical maintenance. They are mainly used to remove damaged bearings along the axial direction. They are mainly composed of a rotary handle, a spiral rod and a pull claw, and can adapt to bearings of different diameters and different axial installation depths. When in use, position the top of the spiral rod at the top hole of the shaft end and adjust the position of the pull claw so that the pull claw is hooked on the outer ring of the bearing. Rotate the rotary handle so that the pull claw drives the bearing to be removed axially outward.

[0003] However, the existing pullers have a single application scope. When encountering the disassembly operation of bearings with different specifications and diameters, it is not convenient to operate or it is necessary to replace pullers of different specifications. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies of the prior art and provide a hydraulic puller.

[0005] The technical solution of the present invention to solve the above problem is: a hydraulic puller, comprising a base, universal wheels installed on the base and located at four corners of the base, a push handle installed on the top of the base, a lifting device installed on the base, an adjusting device installed on the lifting device, and a pull plate assembly installed on the adjusting device;

[0006] The lifting device includes a driving assembly, a base plate mounted on the driving assembly and movable in the Z direction;

[0007] The adjusting device includes a crossbeam installed on the bottom plate and having a T-shaped structure, a transmission box installed on the bottom plate, a motor installed in the transmission box, a drive shaft installed in the transmission box and parallel to the transmission rod and connected to the output shaft of the motor through a rolling bearing, a first gear and a second gear installed on the drive shaft and distributed along the central axis direction of the drive shaft, a lead screw installed on the crossbeam and perpendicular to the bottom plate and extending into the transmission box at the lower end through a rolling bearing, a third gear installed on the lead screw and located in the transmission box and meshing with the first gear, a transmission rod installed on the bottom plate and passing through the transmission box through a rolling bearing, and the transmission rod is provided with a gear symmetrically arranged about the lead screw. a main thread and a secondary thread, a fourth gear mounted on the transmission rod and located in the transmission box and meshing with the second gear, a guide rod A mounted on the crossbeam and distributed along the central axis direction of the transmission rod and located on both sides of the lead screw, a first nut seat threadedly connected to the lead screw and passing through the guide rod A, a guide rod B mounted on the bottom plate at one end and mounted on the transmission box at the other end and located on both sides of the transmission rod, a main nut seat mounted on the transmission rod and threadedly connected to the transmission rod through the main thread and passing through the guide rod B, a secondary nut seat mounted on the transmission rod and threadedly connected to the transmission rod through the secondary thread and passing through the guide rod B, the main nut seat and the secondary nut seat being always symmetrical about the lead screw;

[0008] The main thread and the secondary thread have opposite rotation directions.

[0009] Furthermore, the first nut seat is provided with a first hole for the guide rod A to pass through, and the first hole matches the shape of the guide rod A; the main nut seat is provided with a second hole for the guide rod B to pass through, and the second hole matches the shape of the guide rod B; the secondary nut seat is provided with a third hole for the guide rod C to pass through, and the third hole matches the shape of the guide rod C.

[0010] Further, the pull plate assembly includes a main pull rod detachably mounted on the main nut seat, a secondary pull rod detachably mounted on the secondary nut seat and always symmetrical with the main pull rod about the screw, a first pull rod detachably mounted on the first nut seat, a pull plate detachably mounted on the main pull rod, the secondary pull rod and the first pull rod, a main hydraulic cylinder detachably mounted on the transmission box and coaxially arranged with the pull plate, a hydraulic station mounted on the bottom plate and connected to the main hydraulic cylinder through a main pipeline, and a main valve mounted on the main pipeline;

[0011] The pull plate is a cut-circle structure, with a pull hole at the center of the pull plate, and the center angle of the pull plate is greater than 180° and less than 360°;

[0012] The main pull rod, the auxiliary pull rod and the first pull rod are arranged in a ring array around the central axis of the pull plate.

[0013] Furthermore, the left end surfaces of the main nut seat, the auxiliary nut seat, and the first nut seat are flush;

[0014] The main nut seat is provided with a plurality of main fixing holes, one end of the main pull rod is provided with a main fixing plate, and the main fixing plate is installed on the main nut seat through fasteners; the other end of the main pull rod is installed on the pull plate through threads;

[0015] The auxiliary nut seat is provided with a plurality of auxiliary fixing holes, one end of the auxiliary pull rod is provided with an auxiliary fixing plate, and the auxiliary fixing plate is installed on the auxiliary nut seat through fasteners; the other end of the auxiliary pull rod is installed on the pull plate through threads;

[0016] The first nut seat is provided with a plurality of first fixing holes, one end of the first pull rod is mounted on the first fixing plate, and the first fixing plate is mounted on the first nut seat through a fastener; the other end of the first pull rod is mounted on the pull plate through a thread.

[0017] Further, the driving assembly includes a column vertically mounted on the base, a pair of slide rails mounted on the column and distributed along the central axis of the transmission rod, a base mounted on the slide rails, a secondary hydraulic cylinder mounted on the column through a fixed seat, a main shaft rotatably mounted on the telescopic rod of the secondary hydraulic cylinder, a pair of sprockets mounted on the main shaft and distributed along the central axis of the main shaft, and a chain with one end mounted on the fixed seat and meshing with the sprocket and the other end mounted on the base;

[0018] The bottom plate is vertically installed on the base; the auxiliary hydraulic cylinder is connected with the hydraulic station through an auxiliary pipeline, and an auxiliary valve is installed on the auxiliary pipeline.

[0019] Furthermore, a storage box is installed on the base.

[0020] The present invention has beneficial effects: the present invention solves the problem of the single application scope of the existing puller through the lifting device and the adjusting device; the height of the bottom plate in the Z direction is adjusted by the driving component, so that the rolling bearings with different installation heights and different diameters can be disassembled, and the puller component is ensured to be coaxially arranged with the rolling bearing to be disassembled; the distance between the main nut seat and the auxiliary nut seat is adjusted by the adjusting device, and the height of the first nut seat is adjusted, so that the movable bearings with different diameters can be installed on pull plates with different diameters, and the working range is greatly improved. Through the detachable connection between the main pull rod, the auxiliary pull rod, the first pull rod and the pull plate, the detachable connection between the main pull rod and the main nut seat, the first pull rod and the first nut seat, and the second pull rod and the second nut seat, the versatility is greatly improved, and the required pull rods and pull plates can be replaced according to actual conditions, and the flexibility is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a partial cross-sectional view of the main viewing direction of the present invention;

[0022] Figure 2 A top view of the present invention;

[0023] Figure 3 It is a partial cross-sectional view of the present invention in a top view direction;

[0024] Figure 4 It is a schematic diagram of the installation of the main pull rod and the main nut seat of the present invention;

[0025] Figure 5 It is a schematic diagram of the pull plate structure.

[0026] In the figure:

[0027] 1-base, 2-universal wheel, 3-push handle, 4-lifting device, 5-adjusting device, 6-pull plate assembly, 7-bottom plate, 8-column, 9-slide rail, 10-base, 11-secondary hydraulic cylinder, 12-main shaft, 13-sprocket, 14-chain, 15-fixed seat, 17-crossbeam, 18-motor, 19-drive shaft, 20-first gear, 21-second gear, 22-screw, 23-third gear, 24-transmission rod, 25-fourth gear, 26-guide rod A, 27-first nut seat, 28-guide rod B, 29-main nut seat, 30-secondary nut seat, 31-main pull rod, 32-secondary pull rod, 33-first pull rod, 34-main hydraulic cylinder, 36-main fixed plate, 39-storage box, 40-pull plate, 41-transmission box. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0029] A hydraulic puller comprises a base 1, universal wheels 2 mounted on the base 1 and located at the four corners of the base 1, a push handle 3 mounted on the top of the base 1, a lifting device 4 mounted on the base 1, an adjusting device 5 mounted on the lifting device 4, and a pulling plate 40 assembly 6 mounted on the adjusting device 5.

[0030] The universal wheel 2 is provided with a brake pad for braking.

[0031] The lifting device 4 comprises a driving assembly, a base plate 7 mounted on the driving assembly and movable in the Z direction;

[0032] The driving assembly includes a column 8 vertically mounted on the base 1, a pair of slide rails 9 mounted on the column 8 and distributed along the central axis direction of the transmission rod 24, a base 10 mounted on the slide rails 9, a secondary hydraulic cylinder 11 mounted on the column 8 through a fixed seat 15, a main shaft 12 rotatably mounted on the telescopic rod of the secondary hydraulic cylinder 11, a pair of sprocket wheels 13 mounted on the main shaft 12 and distributed along the central axis direction of the main shaft 12, and a chain 14 with one end mounted on the fixed seat 15 and meshing with the sprocket wheel 13 and the other end mounted on the base 10;

[0033] The bottom plate 7 is vertically mounted on the base 10 .

[0034] When the height of the bottom plate 7 needs to be adjusted, the auxiliary hydraulic cylinder 11 is started, and the sprocket 13 moves with the telescopic rod of the auxiliary hydraulic cylinder 11, and the sprocket 13 engages with the chain 14. Since the length of the chain 14 is a fixed value, the base 10 is driven to move, and the bottom plate 7 moves with the base 10.

[0035] The adjusting device 5 includes a crossbeam 17 installed on the bottom plate 7 and having a T-shaped structure, a transmission box 41 installed on the bottom plate 7, a motor 18 installed in the transmission box 41, a drive shaft 19 rotatably installed in the transmission box 41 through a rolling bearing and parallel to the transmission rod 24 and connected to the output shaft of the motor 18, a first gear 20 and a second gear 21 installed on the drive shaft 19 and distributed along the central axis direction of the drive shaft 19, a lead screw 22 rotatably installed on the crossbeam 17 through a rolling bearing and perpendicular to the bottom plate 7, with the lower end extending into the transmission box 41, a third gear 23 installed on the lead screw 22 and located in the transmission box 41 and meshing with the first gear 20, a transmission rod 24 rotatably installed on the bottom plate 7 through a rolling bearing and passing through the transmission box 41, and the transmission rod 24 is provided with a symmetrical gear 22 about the lead screw 22. a main thread and a secondary thread, a fourth gear 25 mounted on the transmission rod 24 and located in the transmission box 41 and meshing with the second gear 21, a guide rod A26 mounted on the crossbeam 17 and distributed along the central axis direction of the transmission rod 24 and located on both sides of the lead screw 22, a first nut seat 27 threadedly connected to the lead screw 22 and passing through the guide rod A26, a guide rod B28 mounted on the base plate 7 at one end and mounted on the transmission box 41 at the other end and located on both sides of the transmission rod 24, a main nut seat 29 mounted on the transmission rod 24 and threadedly connected to the transmission rod 24 through the main thread and passing through the guide rod B28, a secondary nut seat 30 mounted on the transmission rod 24 and threadedly connected to the transmission rod 24 through the secondary thread and passing through the guide rod B28, the main nut seat 29 and the secondary nut seat 30 are always symmetrical about the lead screw 22;

[0036] The main thread and the secondary thread have opposite rotation directions.

[0037] The first nut seat 27 is provided with a first hole for the guide rod A26 to pass through, and the first hole matches the shape of the guide rod A26; the main nut seat 29 is provided with a second hole for the guide rod B28 to pass through, and the second hole matches the shape of the guide rod B28; the auxiliary nut seat 30 is provided with a third hole for the guide rod C to pass through, and the third hole matches the shape of the guide rod C;

[0038] The line connecting the central axes of the main pull rod 31 and the auxiliary pull rod 32 passes through the center of the pull plate 40 and is parallel to the bottom plate 7; the moving speeds of the first nut seat 27, the main nut seat 29, and the auxiliary nut seat 30 are always the same, the distance between the first nut seat 27 and the center of the pull plate 40 is P1, the distance between the main nut seat 29 and the auxiliary nut seat 30 is P2, and P2=2P1.

[0039] When it is necessary to adjust the height of the first nut seat 27 and the distance between the main nut seat 29 and the secondary nut seat 30, start the motor 18, the motor 18 drives the drive shaft 19 to rotate, the first gear 20 is meshed with the third gear 23, and the second gear 21 is meshed with the fourth gear 25; the screw 22 rotates with the third gear 23, and the height of the first nut seat 27 changes by the transmission of the screw 22; the transmission rod 24 rotates with the fourth gear 25, and through the main thread and the secondary thread, the movement directions of the main nut seat 29 and the secondary nut seat 30 are always opposite, and the distance between the main nut seat 29 and the secondary nut seat 30 changes.

[0040] The lifting device 4 and the adjusting device 5 solve the problem of the single application range of the existing puller; by adjusting the height of the base plate 7 in the Z direction by the driving component, it can be suitable for the disassembly of rolling bearings with different installation heights and different diameter specifications, ensuring that the puller assembly is coaxially arranged with the rolling bearing to be disassembled; by adjusting the distance between the main nut seat 29 and the auxiliary nut seat 30 by the adjusting device 5, the height of the first nut seat 27 is adjusted, so that dynamic bearings of different diameters can be installed on pull plates 40 of different diameters, and the working range is greatly improved.

[0041] The pull plate 40 assembly 6 includes a main pull rod 31 detachably mounted on the main nut seat 29, a secondary pull rod 32 detachably mounted on the secondary nut seat 30 and always symmetrical with the main pull rod 31 about the lead screw 22, a first pull rod 33 detachably mounted on the first nut seat 27, a pull plate 40 detachably mounted on the main pull rod 31, the secondary pull rod 32, and the first pull rod 33, a main hydraulic cylinder 34 detachably mounted on the transmission box 41 and coaxially arranged with the pull plate 40, a hydraulic station mounted on the bottom plate 7 and connected to the main hydraulic cylinder 34 through a main pipeline, and a main valve mounted on the main pipeline;

[0042] The auxiliary hydraulic cylinder 11 is connected to the hydraulic station through an auxiliary pipeline, and an auxiliary valve is installed on the auxiliary pipeline;

[0043] The pull plate 40 is a cut-circle structure, a pull hole is provided at the center of the pull plate 40, and the center angle of the pull plate 40 is greater than 180° and less than 360°.

[0044] A plurality of main fixing holes are provided on the main nut seat 29, a main fixing plate 36 is installed at one end of the main pull rod 31, and the main fixing plate 36 is installed on the main nut seat 29 through fasteners; the other end of the main pull rod 31 is installed on the pull plate 40 through threads;

[0045] A plurality of auxiliary fixing holes are provided on the auxiliary nut seat 30, and an auxiliary fixing plate is installed at one end of the auxiliary pull rod 32, and the auxiliary fixing plate is installed on the auxiliary nut seat 30 through fasteners; the other end of the auxiliary pull rod 32 is installed on the pull plate 40 through threads;

[0046] The first nut seat 27 is provided with a plurality of first fixing holes. One end of the first pull rod 33 is mounted on the first fixing plate. The first fixing plate is mounted on the first nut seat 27 via a fastener. The other end of the first pull rod 33 is mounted on the pull plate 40 via a thread.

[0047] A storage box 39 is installed on the base 1 , and pull rods of various lengths and pull plates 40 of various diameters are placed in the storage box 39 .

[0048] Through the detachable connection between the main pull rod 31, the auxiliary pull rod 32, the first pull rod 33 and the pull plate 40, the detachable connection between the main pull rod 31 and the main nut seat 29, the first pull rod 33 and the first nut seat 27, and the second pull rod and the second nut seat, the versatility is greatly improved, and the required pull rods and pull plates 40 can be replaced according to actual conditions, and the flexibility is greatly improved.

[0049] Working principle of the present invention:

[0050] (1) Push the trolley to move it to the rolling bearing that needs to be removed;

[0051] (2) According to the installation height of the rolling bearing, the driving assembly is started, and the driving assembly drives the base plate 7 to move, so that the main hydraulic cylinder 34 moves to be coaxial with the rolling bearing;

[0052] (3) According to the diameter of the rolling bearing, the adjusting device 5 is started, the main nut seat 29, the auxiliary nut seat 30, and the first nut seat 27 are moved, and a suitable pull plate 40 is selected in the storage box 39 according to the diameter of the rolling bearing, and one end of the three pull rods is installed on the pull plate 40, and then the other ends of the pull rods are installed on the main nut seat 29, the auxiliary nut seat 30, and the first nut seat 27 respectively;

[0053] (4) Press the telescopic rod of the master hydraulic cylinder 34 against the top of the rolling bearing mounting shaft, and place the pull plate 40 behind the rolling bearing and against the rolling bearing. Open the main valve, and the master hydraulic cylinder 34 starts working, and the disassembly is completed.

[0054] Many other changes and modifications may be made without departing from the concept and scope of the present invention.It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A hydraulic puller, characterized in that: It comprises a base (1), universal wheels (2) mounted on the base (1) and located at four corners of the base (1), a push handle (3) mounted on the top of the base (1), a lifting device (4) mounted on the base (1), an adjusting device (5) mounted on the lifting device (4), and a pull plate (40) assembly (6) mounted on the adjusting device (5); The lifting device (4) comprises a driving assembly and a base plate (7) mounted on the driving assembly and movable in the Z direction; The adjusting device (5) comprises a crossbeam (17) mounted on a base plate (7) and having a T-shaped structure, a transmission box (41) mounted on the base plate (7), a motor (18) mounted in the transmission box (41), a drive shaft (19) rotatably mounted in the transmission box (41) through a rolling bearing and parallel to a drive rod (24) and connected to an output shaft of the motor (18), a first gear (20) and a second gear (21) mounted on the drive shaft (19) and distributed along the central axis direction of the drive shaft (19), a lead screw (22) rotatably mounted on the crossbeam (17) through a rolling bearing and perpendicular to the base plate (7) with its lower end extending into the transmission box (41), a third gear (23) mounted on the lead screw (22) and located in the transmission box (41) and meshing with the first gear (20), a transmission rod (24) rotatably mounted on the base plate (7) through a rolling bearing and passing through the transmission box (41), the transmission rod (24) being provided with a gear wheel (23) about the lead screw (22). Symmetrical main threads and secondary threads, a fourth gear (25) mounted on the transmission rod (24) and located in the transmission box (41) and meshing with the second gear (21), a guide rod A (26) mounted on the crossbeam (17) and distributed along the central axis direction of the transmission rod (24) and located on both sides of the lead screw (22), a first nut seat (27) threadedly connected to the lead screw (22) and passing through the guide rod A (26), a guide rod B (28) mounted on the base plate (7) at one end and mounted on the transmission box (41) at the other end and located on both sides of the transmission rod (24), a main nut seat (29) mounted on the transmission rod (24) and threadedly connected to the transmission rod (24) through the main threads and passing through the guide rod B (28), and a secondary nut seat (30) mounted on the transmission rod (24) and threadedly connected to the transmission rod (24) through the secondary threads and passing through the guide rod B (28), the main nut seat (29) and the secondary nut seat (30) being always symmetrical with respect to the lead screw (22); The main thread and the secondary thread have opposite rotation directions; The pull plate (40) assembly (6) comprises a main pull rod (31) detachably mounted on a main nut seat (29), a secondary pull rod (32) detachably mounted on a secondary nut seat (30) and always symmetrical with the main pull rod (31) about a lead screw (22), a first pull rod (33) detachably mounted on a first nut seat (27), a pull plate (40) detachably mounted on the main pull rod (31), the secondary pull rod (32) and the first pull rod (33), and a transmission box (46) detachably mounted on the transmission box (46). 1) and a main hydraulic cylinder (34) coaxially arranged with the pull plate (40), a hydraulic station installed on the bottom plate (7) and connected to the main hydraulic cylinder (34) through a main pipeline, and a main valve installed on the main pipeline; the pull plate (40) is a cut-circle structure, a pull hole is provided at the center of the pull plate (40), and the center angle of the pull plate (40) is greater than 180° and less than 360°; the main pull rod (31), the auxiliary pull rod (32), and the first pull rod (33) are arranged in a ring array around the central axis of the pull plate (40); The driving assembly comprises a column (8) vertically mounted on a base (1), a pair of slide rails (9) mounted on the column (8) and distributed along the central axis of a transmission rod (24), a base (10) mounted on the slide rails (9), a secondary hydraulic cylinder (11) mounted on the column (8) via a fixed seat (15), a main shaft (12) rotatably mounted on a telescopic rod of the secondary hydraulic cylinder (11), a pair of sprockets (13) mounted on the main shaft (12) and distributed along the central axis of the main shaft (12), and a chain (14) having one end mounted on the fixed seat (15) and meshing with the sprocket (13) and the other end mounted on the base (10); the bottom plate (7) is vertically mounted on the base (10); the secondary hydraulic cylinder (11) is connected to the hydraulic station via a secondary pipeline, and a secondary valve is mounted on the secondary pipeline; A brake pad for braking is installed on the universal wheel (2).

2. A hydraulic puller according to claim 1, characterized in that: The first nut seat (27) is provided with a first hole for the guide rod A (26) to pass through, and the first hole matches the shape of the guide rod A (26); the main nut seat (29) is provided with a second hole for the guide rod B (28) to pass through, and the second hole matches the shape of the guide rod B (28); the auxiliary nut seat (30) is provided with a third hole for the guide rod C to pass through, and the third hole matches the shape of the guide rod C.

3. A hydraulic puller according to claim 1, characterized in that: The left end surfaces of the main nut seat (29), the auxiliary nut seat (30) and the first nut seat (27) are flush; A plurality of main fixing holes are provided on the main nut seat (29); a main fixing plate (36) is installed on one end of the main pull rod (31); the main fixing plate (36) is installed on the main nut seat (29) via fasteners; the other end of the main pull rod (31) is installed on the pull plate (40) via threads; A plurality of auxiliary fixing holes are provided on the auxiliary nut seat (30); an auxiliary fixing plate is mounted on one end of the auxiliary pull rod (32); the auxiliary fixing plate is mounted on the auxiliary nut seat (30) via a fastener; and the other end of the auxiliary pull rod (32) is mounted on the pull plate (40) via a thread. The first nut seat (27) is provided with a plurality of first fixing holes, one end of the first pull rod (33) is mounted on the first fixing plate, and the first fixing plate is mounted on the first nut seat (27) via a fastener; the other end of the first pull rod (33) is mounted on the pulling plate (40) via a thread.

4. A hydraulic puller according to claim 1, characterized in that: A storage box (39) is installed on the base (1).

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