Lifting oil cylinder assembly of pipe bending machine

Abstract

The utility model relates to the technical field of machine manufacturing, and discloses a pipe bending machine lifting oil cylinder assembly which comprises a top plate, a cylinder body is fixedly connected to the inner wall of the top plate, a first circulation opening is formed in the upper side of the outer wall of the cylinder body, and a second circulation opening is formed in the lower side of the outer wall of the cylinder body. The inner wall of the second circulation opening and the inner wall of the second circulation opening communicate with circulation pipes, the inner walls of the circulation pipes communicate with bypass pipes, the right ends of the bypass pipes are fixedly connected with sleeves, the front ends of the circulation pipes are fixedly connected with filter pipes, and the inner walls of the filter pipes are fixedly connected with filter plates. According to the oil cylinder, the circulating pipe and the sleeve are connected with the hydraulic oil pipe at the same time, so that when hydraulic oil moves, the baffle is extruded, the compression spring of the baffle moves along the fixing roller to be separated from the filter pipe, the filter plate is prevented from being scoured by the hydraulic oil, the service life of the oil cylinder is prolonged, and operation noise and vibration are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, in particular to a lifting cylinder assembly of a pipe bending machine. Background Art

[0002] A pipe bender is a mechanical device used to bend pipes. It can bend metal pipes, plastic pipes, rubber pipes and other materials into the required shape and angle. It is divided into hydraulic pipe bender, electric pipe bender and manual pipe bender. The hydraulic pipe bender uses a hydraulic device to provide power and pushes the bending die through the hydraulic cylinder to achieve the bending of the pipe. The electric pipe bender uses an electric motor as the power source and achieves the bending of the pipe through a mechanical transmission mechanism. The hydraulic pipe bender uses a hydraulic device, and the hydraulic cylinder is its important component.

[0003] The function of the pipe bending machine lifting cylinder is to provide support and positioning of the pipe during the bending process to assist the bending process. By adjusting the position of the cylinder, a more precise bending angle can be achieved. The working principle of the pipe bending machine lifting cylinder is based on hydraulic transmission. When the hydraulic oil is pumped into the cylinder, the piston inside the cylinder moves under the action of the oil pressure, thereby achieving lifting or lowering action. Therefore, its performance directly affects the overall working efficiency of the pipe bending machine and the quality of pipe processing.

[0004] The hydraulic oil in the existing pipe bending machine lifting cylinder assembly can be filtered through the filter plate, but when the hydraulic oil needs to circulate in and out of the cylinder, it will flush the filter plate, so that the impurities filtered out are flushed back into the hydraulic oil, resulting in a shortened cylinder life, performance degradation, and high operating noise and vibration. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a pipe bending machine lifting cylinder assembly, which aims to improve the problem in the existing technology that when filtering the hydraulic oil, the hydraulic oil needs to circulate into and out of the cylinder, which will flush the filter plate, so that the impurities filtered out are flushed back into the hydraulic oil again, resulting in a reduced cylinder life.

[0006] The top end of the oil pump stretches out the side of the oil pumping station and is provided with a circle, and the top of the oil pump stretches out the side of the oil pumping station to form a circle.

[0007] As a further description of the above technical solution:

[0008] The cooling mechanism includes a cooling shell, the inner wall of the cooling shell is fixedly connected to the outer wall of the circulation pipe, the middle part of the inner wall of the cooling shell is connected to an annular pipe, the inner wall of the annular pipe is connected to a second cooling pipe, the bottom end of the second cooling pipe is connected to a water pump, the input end of the water pump is connected to a return pipe, and the bottom of the inner wall of the cooling shell is connected to the first cooling pipe.

[0009] As a further description of the above technical solution:

[0010] The four corners of the bottom of the top plate are fixedly connected with fixing columns, and the bottom ends of the fixing columns are fixedly connected with the bottom plate.

[0011] As a further description of the above technical solution:

[0012] A controller is fixedly connected to the rear side of the base plate, and the controller is electrically connected to the water pump.

[0013] As a further description of the above technical solution:

[0014] The four corners on the top of the top plate are all threadedly connected with screws, and the multiple screws are all threadedly connected at the same height.

[0015] As a further description of the above technical solution:

[0016] The outer wall of the fixing rod is fitted with the rear end of the filter tube, and the rear end of the spring is fixedly connected to the outer wall of the fixing rod.

[0017] As a further description of the above technical solution:

[0018] The inner wall of the cylinder is slidably connected with a piston, and the top of the inner wall of the cylinder is fixedly connected with a second rubber ring.

[0019] As a further description of the above technical solution:

[0020] A movable column is fixedly connected to the middle of the outer wall of the piston, and a rubber ring 1 is fixedly connected to the outer wall of the piston.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, by connecting the circulation pipe and the casing to the hydraulic oil pipe at the same time, the hydraulic oil squeezes the baffle during the forward stroke, causing its compression spring to move along the fixed rod and break away from the fit with the filter pipe. During the return stroke, the baffle in the circulation pipe is limited by the limit block and cannot move, the baffle in the casing is pushed, and the liquid enters the casing from the bypass pipe and flows back, thereby preventing the hydraulic oil from scouring the filter plate, extending the service life of the oil cylinder, and reducing the noise and vibration during operation.

[0023] 2. In the utility model, by starting the water pump, the coolant enters the interlayer between the cooling shell and the circulation pipe from the annular pipe to cool the liquid in the circulation pipe, and then enters the first cooling pipe to cool the coolant, and then cools the liquid in the lower circulation pipe. After returning to the water pump through the return pipe, it moves upward to the second cooling pipe to cool the coolant, thereby achieving the purpose of cooling the hydraulic oil by circulation, improving work efficiency, extending service life, and reducing use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front perspective view of a pipe bending machine lifting cylinder assembly proposed in the utility model;

[0025] Figure 2 This is a test diagram of the lifting cylinder assembly of a pipe bending machine proposed in this utility model;

[0026] Figure 3 This is a partial structural exploded view of the cooling shell of the lifting cylinder assembly of a pipe bending machine proposed in the utility model;

[0027] Figure 4 This is a partial structural exploded view of the filter tube of the lifting cylinder assembly of a pipe bending machine proposed in the utility model;

[0028] Figure 5 The utility model is a cross-sectional view of a pipe bending machine lifting cylinder assembly.

[0029] Legend:

[0030] 1. Top plate; 2. Cooling mechanism; 201. Cooling shell; 202. First cooling pipe; 203. Return pipe; 204. Ring pipe; 205. Second cooling pipe; 206. Water pump; 3. Cylinder body; 4. Filter plate; 5. Circulation pipe; 6. Bypass pipe; 7. Casing; 8. Filter pipe; 9. Fixing rod; 10. Spring; 11. Limit block; 12. Baffle; 13. Fixing rod; 14. Circulation port 1; 15. Circulation port 2; 16. Piston; 17. Rubber ring 1; 18. Rubber ring 2; 19. Movable column; 20. Fixed column; 21. Bottom plate; 22. Controller; 23. Screw. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Please see the attached Figure 1 - Attachment Figure 3 , the utility model provides an embodiment: a pipe bending machine lifting cylinder assembly, including a top plate 1, the inner wall of the top plate 1 is fixedly connected to the cylinder body 3, the upper side of the outer wall of the cylinder body 3 is provided with a circulation port 14, the lower side of the outer wall of the cylinder body 3 is provided with a circulation port 2 15, the inner walls of the circulation port 2 15 and the circulation port 2 15 are both connected with a circulation pipe 5, the inner wall of the circulation pipe 5 is connected with a bypass pipe 6, the right end of the bypass pipe 6 is fixedly connected with a sleeve 7, the front end of the circulation pipe 5 is fixedly connected with a filter pipe 8, the inner wall of the filter pipe 8 is fixedly connected with a filter plate 4, the circulation pipe 5 and The inner wall of the sleeve 7 is fixedly connected with a fixing rod 13, the outer wall of the fixing rod 13 is fixedly connected with a fixing stick 9, the top of the fixing stick 9 is fixedly connected with a limit block 11, the outer wall of the fixing stick 9 is provided with a baffle 12, the inner wall of the baffle 12 is slidably connected to the outer wall of the fixing stick 9, the outer wall of the baffle 12 is fixedly connected with a spring 10, the outer wall of the circulation pipe 5 is fixedly connected with a cooling mechanism 2, the cooling mechanism 2 is used to cool the hydraulic oil, the four corners of the bottom of the top plate 1 are fixedly connected with a fixing column 20, and the bottom end of the fixing column 20 is fixedly connected to the bottom plate 21;

[0033] Specifically, circulation port 1 14 is used for the circulation flow of hydraulic oil, circulation port 2 15 is also used for the circulation flow of hydraulic oil, the bypass pipe 6 can return the hydraulic oil, the filter plate 4 is used to filter out impurities in the hydraulic oil to ensure the cleanliness of the hydraulic oil, the spring 10 plays a buffering and resetting role, ensuring that the baffle 12 can return to its original position after being squeezed and slid by the hydraulic oil, the four corners of the bottom of the top plate 1 are fixedly connected with fixed columns 20, the bottom end of the fixed column 20 is fixedly connected with a bottom plate 21, the bottom plate 21 plays a role in supporting the entire lifting cylinder assembly to ensure its stability and durability, and the baffle 12 can block the hydraulic oil in a single direction.

[0034] Please see the attached Figure 2 - Attachment Figure 4 The cooling mechanism 2 includes a cooling shell 201, the inner wall of the cooling shell 201 is fixedly connected to the outer wall of the circulation pipe 5, the middle part of the inner wall of the cooling shell 201 is connected with an annular pipe 204, the inner wall of the annular pipe 204 is connected with a second cooling pipe 205, the bottom end of the second cooling pipe 205 is connected with a water pump 206, the input end of the water pump 206 is connected with a return pipe 203, the bottom of the inner wall of the cooling shell 201 is connected with the first cooling pipe 202, the rear side of the bottom plate 21 is fixedly connected with a controller 22, and the controller 22 and the water pump 206 are electrically connected;

[0035] Specifically, the function of the water pump 206 is to extract liquid from the system and circulate it to achieve the purpose of cooling. The first cooling pipe 202 is used to cool the heated hydraulic oil. The annular pipe 204 can circulate the hydraulic oil, and the return pipe 203 ensures that the liquid can return to the water pump 206.

[0036] Please see the attached Figure 3 - Attachment Figure 5 , the outer wall of the fixed stick 9 fits with the rear end of the filter tube 8, the rear end of the spring 10 is fixedly connected to the outer wall of the fixed rod 13, the four corners of the top of the top plate 1 are threaded with screws 23, and multiple screws 23 are threaded at the same height. The middle part of the outer wall of the piston 16 is fixedly connected with a movable column 19, and the outer wall of the piston 16 is fixedly connected with a rubber ring 17. The inner wall of the cylinder 3 is slidably connected with the piston 16, and the top of the inner wall of the cylinder 3 is fixedly connected with a rubber ring 2 18;

[0037] Specifically, the screw 23 ensures the stability and uniform force of the top plate 1. The role of the rubber ring 17 is to increase the sealing between the piston 16 and the inner wall of the cylinder 3 to prevent liquid leakage. The role of the rubber ring 2 18 is to further enhance the sealing effect between the cylinder 3 and the piston 16 to ensure the sealing and reliability of the entire system. The model of the water pump 206 is IS80-65-160

[0038] Working principle: The filter tube 8 and the sleeve 7 are both connected to the hydraulic oil pipe. When the hydraulic oil flows from the filter tube 8 to the circulation tube 5 by the hydraulic pump, it first passes through the filter plate 4 for filtration, and then flows to the circulation tube 5 against the baffle 12, compressing the spring 10, so that the baffle 12 slides backward along the fixed rod 9 and breaks away from the fit with the filter tube 8. At the same time, the hydraulic oil entering the sleeve 7 flows to the bypass tube 6, but it squeezes the rear side of the fixed rod 9 in the sleeve 7, which is stuck by the limit block 11 and cannot move. When the hydraulic oil returns, it squeezes the rear side of the fixed rod 9 in the circulation tube 5, which is limited by the limit block 11 and fits the filter tube 8, and is forced to flow into the bypass tube 6, so that the fixed rod 9 in the sleeve 7 compresses the spring 10 and moves it backward, and the liquid is able to flow back from the sleeve 7, preventing the filter plate 4 from being flushed and the filtered impurities from returning to the hydraulic oil tank again;

[0039] When hydraulic work is performed, the water pump 206 is started to push the liquid from the second cooling pipe 205 into the annular pipe 204, and then flows into the space between the cooling shell 201 and the circulation pipe 5 to cool the passing hydraulic oil. When the lower hydraulic oil returns, the heated liquid in the cooling shell 201 enters the first cooling pipe 202 for cooling, and then enters the lower cooling shell 201, and is finally pumped upward again by the water pump 206 through the return pipe 203.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipe bending machine lifting cylinder assembly, comprising a top plate (1), characterized in that: The inner wall of the top plate (1) is fixedly connected to the cylinder body (3), the upper side of the outer wall of the cylinder body (3) is provided with a circulation port 1 (14), the lower side of the outer wall of the cylinder body (3) is provided with a circulation port 2 (15), the inner walls of the circulation port 2 (15) and the circulation port 2 (15) are both connected to a circulation pipe (5), the inner wall of the circulation pipe (5) is connected to a bypass pipe (6), the right end of the bypass pipe (6) is fixedly connected to a sleeve (7), the front end of the circulation pipe (5) is fixedly connected to a filter pipe (8), the inner wall of the filter pipe (8) is fixedly connected to a filter plate (4), The inner walls of the circulation pipe (5) and the sleeve (7) are fixedly connected to a fixing rod (13), the outer wall of the fixing rod (13) is fixedly connected to a fixing stick (9), the top end of the fixing stick (9) is fixedly connected to a limiting block (11), the outer wall of the fixing stick (9) is provided with a baffle (12), the inner wall of the baffle (12) is slidably connected to the outer wall of the fixing stick (9), the outer wall of the baffle (12) is fixedly connected to a spring (10), the outer wall of the circulation pipe (5) is fixedly connected to a cooling mechanism (2), and the cooling mechanism (2) is used to cool the hydraulic oil.

2. The pipe bending machine lifting cylinder assembly according to claim 1, characterized in that: The cooling mechanism (2) comprises a cooling shell (201), the inner wall of the cooling shell (201) is fixedly connected to the outer wall of the circulation pipe (5), the middle portion of the inner wall of the cooling shell (201) is connected to an annular pipe (204), the inner wall of the annular pipe (204) is connected to a second cooling pipe (205), the bottom end of the second cooling pipe (205) is connected to a water pump (206), the input end of the water pump (206) is connected to a return pipe (203), and the bottom of the inner wall of the cooling shell (201) is connected to the first cooling pipe (202).

3. The pipe bending machine lifting cylinder assembly according to claim 1, characterized in that: The four corners of the bottom of the top plate (1) are all fixedly connected with fixed columns (20), and the bottom ends of the fixed columns (20) are fixedly connected with the bottom plate (21).

4. The pipe bending machine lifting cylinder assembly according to claim 3, characterized in that: A controller (22) is fixedly connected to the rear side of the base plate (21), and the controller (22) is electrically connected to the water pump (206).

5. The pipe bending machine lifting cylinder assembly according to claim 1, characterized in that: The four corners on the top of the top plate (1) are all threadedly connected with screws (23), and the plurality of screws (23) are all threadedly connected at the same height.

6. The pipe bending machine lifting cylinder assembly according to claim 1, characterized in that: The outer wall of the fixing rod (9) is in contact with the rear end of the filter tube (8), and the rear end of the spring (10) is fixedly connected to the outer wall of the fixing rod (13).

7. The pipe bending machine lifting cylinder assembly according to claim 1, characterized in that: The inner wall of the cylinder body (3) is slidably connected to a piston (16), and the top of the inner wall of the cylinder body (3) is fixedly connected to a second rubber ring (18).

8. The pipe bending machine lifting cylinder assembly according to claim 7, characterized in that: A movable column (19) is fixedly connected to the middle of the outer wall of the piston (16), and a rubber ring (17) is fixedly connected to the outer wall of the piston (16).

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