Hydraulic puller

Abstract

The hydraulic puller comprises a puller body, an oil pump piston, a valve assembly, a piston rod and a hook claw, a first oil cavity, a second oil cavity and an annular cavity are formed in the puller body, and a hydraulic piston is connected in the second oil cavity in a sealed and sliding mode and divides the second oil cavity into an oil return cavity and a pressurization cavity which are arranged up and down. A first channel communicated with the first oil cavity and the pressurizing cavity, a second channel communicated with the annular cavity and the oil return cavity, a third channel communicated with the annular cavity and the first oil cavity and an oil discharging channel communicated with the pressurizing cavity and the oil return cavity are formed in the puller body, and an elastic oil bag is installed in the annular cavity and communicated with the second channel and the third channel. The top of the puller body is provided with a communication hole communicated with the first oil cavity, and the bottom of the puller body is provided with a through hole communicated with the pressurizing cavity. The hydraulic puller belongs to the technical field of disassembly and assembly equipment, parts in interference fit are disassembled in a drawing mode, and the hydraulic puller can be placed in a narrow space.

Description

Technical Field

[0001] The utility model relates to a hydraulic puller and belongs to the technical field of disassembly and assembly equipment. Background Art

[0002] Pullers are tools frequently used in mechanical maintenance, and are mainly used to disassemble parts with interference fits. At present, the traditional puller on the market works in a push-type manner, which mainly drives the hydraulic starter rod forward by swinging the handle back and forth while the push rod remains stationary, and the claw seat moves forward with the thread to complete the work. The claw seat of the traditional puller has a large spatial structure and is used to pull the outer ring. For example, CN219466071 U is a hydraulic puller with multiple hooks distributed on the outside, which is difficult to play its role under limited working space.

[0003] Therefore, there is an urgent need for a hydraulic puller with a compact structure, small size, and convenient operation in a narrow space. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a hydraulic puller which can dismantle interference-fit parts by pulling and can be placed in a narrow space.

[0005] The utility model solves the above technical problems with the following technical solutions: a hydraulic puller, comprising:

[0006] A puller body, wherein the puller body is provided with an independent oil chamber 1 and an oil chamber 2 and an annular chamber located on the periphery of the oil chamber 1, the oil chamber 2 is sealingly and slidably connected with a hydraulic piston and divides the oil chamber 2 into an oil return chamber and a pressurizing chamber arranged up and down, the puller body is provided with a channel 1 connecting the oil chamber 1 and the pressurizing chamber, a channel 2 connecting the annular chamber and the oil return chamber, a channel 3 connecting the annular chamber and the oil chamber 1, and an oil unloading channel connecting the pressurizing chamber and the oil return chamber, an elastic oil bag is installed in the annular chamber, and the elastic oil bag is connected with the channel 2 and the channel 3 respectively, a connecting hole connecting the oil chamber 1 is provided at the top of the puller body, and a through hole connecting the pressurizing chamber is provided at the bottom;

[0007] An oil pump piston, the oil pump piston is sealingly and slidably connected in the communicating hole for conveying the hydraulic oil in the oil chamber 1 to the pressurizing chamber;

[0008] A valve assembly, the valve assembly is used to control the flow of hydraulic oil among the oil chamber 1, the oil return chamber, the pressurizing chamber, the elastic oil bag, the channel 1, the channel 2, the channel 3 and the oil unloading channel;

[0009] A piston rod, the piston rod is sealingly and slidably connected in the through hole and the upper end of the piston rod is fixedly connected to the hydraulic piston;

[0010] A hook is fixed at the lower end of the piston rod and is used for grabbing the parts to be disassembled.

[0011] The beneficial effects of the utility model are as follows: the oil pump piston moves along the pressurizing direction and penetrates into the oil chamber one from the connecting hole, and the valve assembly can make the hydraulic oil in the oil chamber one only be delivered to the pressurizing chamber through the channel one, and the hydraulic oil enters the pressurizing chamber to lift the hydraulic piston along the lifting direction, and the hydraulic piston pulls the piston rod, and the hook claw is hooked on the part to be disassembled, so that the part to be disassembled can be pulled out from the device, and the operation can be carried out in a narrow space by pulling; the valve assembly controls the hydraulic oil to enter the elastic oil bag only through the channel two, and when the hydraulic piston is lifted, the hydraulic oil in the oil return chamber is squeezed into the elastic oil bag through the channel two, and the oil pump piston moves upward, and the pressure in the oil chamber one is reduced, and the valve assembly can control the hydraulic oil in the elastic oil bag to enter the oil chamber one only through the channel three, and the hydraulic oil in the elastic oil bag is sucked into the oil chamber one, so that the hydraulic piston can be continuously lifted; when the work is completed, the valve assembly controls the oil unloading channel to be opened, so that the hydraulic oil in the pressurizing chamber flows back to the oil return chamber through the oil unloading channel.

[0012] On the basis of the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, the valve assembly includes an oil unloading valve, a first one-way valve, a second one-way valve and a third one-way valve. The oil unloading valve is installed on the oil unloading channel to control the flow of hydraulic oil from the pressurizing chamber to the oil return chamber. The first one-way valve is installed in the channel one to control the hydraulic oil from the oil chamber one to the pressurizing chamber. The second one-way valve is installed in the channel two to control the hydraulic oil from the oil return chamber to the elastic oil bag. The third one-way valve is installed in the channel three to control the hydraulic oil from the elastic oil bag to the oil chamber one.

[0014] The beneficial effects of adopting the above further scheme are as follows: a first one-way valve is arranged in channel one, and the oil pump piston extends into oil chamber one to squeeze the hydraulic oil in oil chamber one into the pressurizing chamber through channel one, and the first one-way valve prevents the hydraulic oil in the pressurizing chamber from flowing back; a second one-way valve is arranged in channel two, and after the hydraulic piston is lifted up, the hydraulic oil in the return oil chamber is squeezed into the elastic oil bag, and after the hydraulic piston descends, the hydraulic oil in the elastic oil bag is prevented from flowing back into the return oil chamber; a third one-way valve is arranged in channel three, and when the oil pump piston squeezes the hydraulic oil in oil chamber one downward, the hydraulic oil is prevented from entering the elastic oil bag from channel three, and when the oil pump piston moves upward to extract the hydraulic oil, only the hydraulic oil in the elastic oil bag can be sucked into oil chamber one through channel three; after the disassembly work is completed, the pressure relief valve is opened, and the hydraulic oil in the pressurizing chamber is transported to the return oil chamber through the oil unloading channel, and the hydraulic piston descends to the bottom of the pressurizing chamber, so that the hook claw is reset.

[0015] Furthermore, it also includes a connecting rod assembly, which includes a pressing handle and an articulated seat, the articulated seat is fixed on the outer wall of the puller body, the handle of the pressing handle is articulated to the articulated seat, and one end of the pressing handle is articulated to the oil pump piston.

[0016] The beneficial effect of adopting the above further scheme is: the pressing handle swings around the hinge seat, driving the oil pump piston to slide in the connecting hole, sucking the hydraulic oil in the elastic oil bag into the oil chamber one, and transporting the hydraulic oil in the oil chamber one to the pressurized chamber.

[0017] Furthermore, the hinge seat includes a fixing rod and a connecting rod, one end of the fixing rod is fixed to the outer wall of the puller body, one end of the connecting rod is hinged to the other end of the fixing rod, and the other end of the connecting rod is hinged to the pressing handle.

[0018] The beneficial effect of adopting the above further solution is that the two ends of the connecting rod are respectively hinged to the fixed rod and the pressing handle, which can improve the freedom of the pressing handle and enable the oil pump piston to move along the axial direction of the connecting hole.

[0019] Furthermore, it also includes a fixing tube, which is fixed to the bottom of the puller body corresponding to the through hole, and the hook is located in the fixing tube.

[0020] The beneficial effect of adopting the above further scheme is as follows: the fixed cylinder cover is arranged on the part to be disassembled and abuts against the device for installing the part to be disassembled, the hook claw is connected to the part to be disassembled, and the hook claw pulls the disassembled part outward. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A structural schematic diagram of a hydraulic puller provided by the utility model;

[0022] Figure 2 for Figure 1 A magnified view of part A;

[0023] Figure 3 for Figure 1 Enlarged view of part B.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1-puller body, 2-oil chamber one, 3-oil chamber two, 4-annular chamber, 5-channel one, 6-channel two, 7-channel three, 8-elastic oil bag, 9-oil unloading channel, 10-oil pump piston, 11-hydraulic piston, 12-piston rod, 13-hooking claw, 14-oil unloading valve, 15-connecting rod assembly, 151-pressing handle, 152-articulated seat, 1521-fixing rod, 1522-connecting rod, 16-fixing cylinder, 17-pressurization direction, 18-lifting direction. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0027] The utility model aims to provide a hydraulic puller to solve the problems existing in the prior art, disassemble interference-fit parts by pulling, and can be placed in a narrow space.

[0028] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] The utility model provides a hydraulic puller, such as Figures 1 to 3 As shown, it includes: a puller body 1, an oil pump piston 10, a valve assembly, a piston rod 12 and a hook 13. The puller body 1 is provided with an independent oil chamber 1 2 and an oil chamber 2 3 and an annular chamber 4 located on the periphery of the oil chamber 1 2. A hydraulic piston 11 is sealed and slidably connected in the oil chamber 2 3 and divides the oil chamber 2 3 into an oil return chamber and a pressurizing chamber arranged up and down. The puller body 1 is provided with a channel 1 5 connecting the oil chamber 1 2 and the pressurizing chamber, a channel 2 6 connecting the annular chamber 4 and the oil return chamber, a channel 3 7 connecting the annular chamber 4 and the oil chamber 1 2 and an oil unloading channel 9 connecting the pressurizing chamber and the oil return chamber. An elastic oil bag 8 is installed in the annular chamber 4. The elastic oil The bag 8 is connected with the channel 2 6 and the channel 3 7 respectively; a connecting hole connected with the oil chamber 1 2 is provided on the top of the puller body 1, and a through hole connected with the pressurizing chamber is provided on the bottom; the oil pump piston 10 is sealingly and slidably connected in the connecting hole for conveying the hydraulic oil in the oil chamber 2 to the pressurizing chamber; the valve assembly is used to control the flow of hydraulic oil between the oil chamber 1 2, the return oil chamber, the pressurizing chamber, the elastic oil bag 8, the channel 1 5, the channel 2 6, the channel 3 7 and the oil unloading channel 9; the piston rod 12 is sealingly and slidably connected in the through hole and the upper end is fixedly connected with the hydraulic piston 11; the hook 13 is fixed at the lower end of the piston rod 12 for grabbing the parts to be disassembled.

[0030] The utility model provides a hydraulic puller, in which the oil pump piston 10 moves along the pressurizing direction 17 and penetrates into the oil chamber 2 from the connecting hole, and the valve assembly can make the hydraulic oil in the oil chamber 2 only be delivered to the pressurizing chamber through the channel 5, and the hydraulic oil enters the pressurizing chamber to lift the hydraulic piston 11 along the lifting direction 18, and the hydraulic piston 11 pulls the piston rod 12, and the hook 13 is hooked on the part to be disassembled, so that the part to be disassembled can be pulled out of the device, and the operation can be carried out in a small space by pulling; the valve assembly controls the hydraulic oil to enter the elastic member only through the channel 6 When the hydraulic piston 11 is lifted up in the elastic oil bag 8, the hydraulic oil in the return oil chamber is squeezed into the elastic oil bag 8 through the channel 2 6, the oil pump piston 10 moves upward, and the pressure in the oil chamber 2 is reduced. The valve assembly can control the hydraulic oil in the elastic oil bag 8 to enter the oil chamber 2 only through the channel 3 7. The hydraulic oil in the elastic oil bag 8 is sucked into the oil chamber 2, which can continuously lift the hydraulic piston 11; when the work is completed, the valve assembly controls the oil unloading channel 9 to open, so that the hydraulic oil in the pressurized chamber flows back to the return oil chamber through the oil unloading channel 9.

[0031] In a specific embodiment of the utility model, the valve assembly includes an oil unloading valve 14, a first one-way valve, a second one-way valve and a third one-way valve. The oil unloading valve 14 is installed on the oil unloading channel 9 to control the flow of hydraulic oil from the pressurizing chamber to the return oil chamber. The first one-way valve is installed in the channel 1 5 to control the hydraulic oil from the oil chamber 1 2 to the pressurizing chamber. The second one-way valve is installed in the channel 2 6 to control the hydraulic oil from the return oil chamber to the elastic oil bag 8. The third one-way valve is installed in the channel 3 7 to control the hydraulic oil from the elastic oil bag 8 to the oil chamber 2.

[0032] A first one-way valve is arranged in channel 1 5, and the oil pump piston 10 extends into the oil chamber 1 2 to squeeze the hydraulic oil in the oil chamber 2 into the pressurizing chamber through channel 1 5. The first one-way valve prevents the hydraulic oil in the pressurizing chamber from flowing back. A second one-way valve is arranged in channel 2 6. After the hydraulic piston 11 is lifted up, the hydraulic oil in the return oil chamber is squeezed into the elastic oil bag 8. After the hydraulic piston 11 descends, the hydraulic oil in the elastic oil bag 8 is prevented from flowing back into the return oil chamber. A third one-way valve is arranged in channel 3 7. When the oil pump piston 10 squeezes the hydraulic oil in the oil chamber 2 downward, the hydraulic oil is prevented from entering the elastic oil bag 8 from the channel 3 7. When the oil pump piston 10 moves upward to extract the hydraulic oil, only the hydraulic oil in the elastic oil bag 8 can be sucked into the oil chamber 2 through channel 3 7. After the disassembly work is completed, the pressure relief valve is opened, and the hydraulic oil in the pressurizing chamber is transported to the return oil chamber through the oil unloading channel 9. The hydraulic piston 11 descends to the bottom of the pressurizing chamber, so that the hook 13 is reset.

[0033] In a specific embodiment of the utility model, it also includes a connecting rod assembly 15, which includes a pressing handle 151 and an articulated seat 152. The articulated seat 152 is fixed on the outer wall of the puller body 1, the handle of the pressing handle 151 is hinged to the articulated seat 152, and one end of the pressing handle 151 is hinged to the oil pump piston 10.

[0034] The pressing handle 151 swings around the hinge seat 152 as the center, driving the oil pump piston 10 to slide in the connecting hole, sucking the hydraulic oil in the elastic oil bag 8 into the oil chamber 2, and delivering the hydraulic oil in the oil chamber 2 to the pressurized chamber.

[0035] In a specific embodiment of the utility model, the articulated seat 152 includes a fixed rod 1521 and a connecting rod 1522, one end of the fixed rod 1521 is fixed to the outer wall of the puller body 1, one end of the connecting rod 1522 is hinged to the other end of the fixed rod 1521, and the other end of the connecting rod 1522 is hinged to the pressing handle 151.

[0036] The two ends of the connecting rod 1522 are respectively hinged to the fixing rod 1521 and the pressing handle 151 , which can improve the freedom of the pressing handle 151 and enable the oil pump piston 10 to move along the axial direction of the communicating hole.

[0037] In a specific embodiment of the utility model, a fixing cylinder 16 is further included. The fixing cylinder 16 is fixed to the bottom of the puller body 1 corresponding to the through hole, and the hook 13 is located in the fixing cylinder 16 .

[0038] The fixing tube 16 is covered on the part to be disassembled and abutted against the device for installing the part to be disassembled, the hook claw 13 is connected to the part to be disassembled, and the hook claw 13 pulls the disassembled part outward.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic puller, characterized in that: include: A puller body (1), wherein the puller body (1) is provided with an independent oil chamber (2) and an oil chamber (3) and an annular chamber (4) located on the periphery of the oil chamber (2), wherein the oil chamber (3) is sealed and slidably connected with a hydraulic piston (11) and the oil chamber (3) is divided into an oil return chamber and a pressure chamber arranged in an upper and lower manner, wherein the puller body (1) is provided with a channel (5) connecting the oil chamber (2) and the pressure chamber, and a channel (5) connecting the annular chamber (4) and the pressure chamber. The second channel (6) of the oil return chamber, the third channel (7) connecting the annular chamber (4) and the oil chamber one (2), and the oil discharge channel (9) connecting the pressurizing chamber and the oil return chamber, an elastic oil bag (8) is installed in the annular chamber (4), and the elastic oil bag (8) is respectively connected to the second channel (6) and the third channel (7), the top of the puller body (1) is provided with a connecting hole connecting to the oil chamber one (2), and the bottom is provided with a through hole connecting to the pressurizing chamber; An oil pump piston (10), the oil pump piston (10) being sealingly and slidably connected in the communicating hole for conveying the hydraulic oil in the oil chamber 1 (2) to the pressurizing chamber; A valve assembly, the valve assembly being used to control the flow of hydraulic oil among the oil chamber 1 (2), the oil return chamber, the pressurizing chamber, the elastic oil bag (8), the channel 1 (5), the channel 2 (6), the channel 3 (7) and the oil unloading channel (9); A piston rod (12), the piston rod (12) is sealingly and slidably connected in the through hole and the upper end of the piston rod (12) is fixedly connected to the hydraulic piston (11); A hook (13) is fixed to the lower end of the piston rod (12) and is used for grabbing the parts to be disassembled.

2. A hydraulic puller according to claim 1, characterized in that: The valve assembly comprises an oil unloading valve (14), a first one-way valve, a second one-way valve and a third one-way valve. The oil unloading valve (14) is installed on the oil unloading channel (9) to control the flow of hydraulic oil from the pressurizing chamber to the oil return chamber. The first one-way valve is installed in the channel one (5) to control the delivery of hydraulic oil from the oil chamber one (2) to the pressurizing chamber. The second one-way valve is installed in the channel two (6) to control the delivery of hydraulic oil from the oil return chamber to the elastic oil bag (8). The third one-way valve is installed in the channel three (7) to control the delivery of hydraulic oil from the elastic oil bag (8) to the oil chamber one (2).

3. A hydraulic puller according to claim 1, characterized in that: It also includes a connecting rod assembly (15), the connecting rod assembly (15) includes a pressing handle (151) and an articulated seat (152), the articulated seat (152) is fixed on the outer wall of the puller body (1), the handle of the pressing handle (151) is articulated to the articulated seat (152), and one end of the pressing handle (151) is articulated to the oil pump piston (10).

4. A hydraulic puller according to claim 3, characterized in that: The hinge seat (152) comprises a fixing rod (1521) and a connecting rod (1522), one end of the fixing rod (1521) is fixed to the outer wall of the puller body (1), one end of the connecting rod (1522) is hinged to the other end of the fixing rod (1521), and the other end of the connecting rod (1522) is hinged to the pressing handle (151).

5. A hydraulic puller according to claim 4, characterized in that: It also includes a fixing tube (16), wherein the fixing tube (16) is fixed to the bottom of the puller body (1) corresponding to the through hole, and the hook (13) is located in the fixing tube (16).

Images