Automatic copper bush pressing device for gear pump

Abstract

The utility model discloses an automatic copper bush pressing device for a gear pump, which comprises a workbench, a first telescopic driving mechanism and a second telescopic driving mechanism are arranged on two sides of the workbench, the telescopic end of the first driving mechanism is fixedly connected with a copper bush push rod, and the telescopic end of the second driving mechanism is provided with an extrusion plate. A tool plate used for containing a gear pump is arranged in the middle of the first driving mechanism and the middle of the second driving mechanism, a copper sleeve clamping position used for clamping a copper sleeve and a positioning pin used for positioning the gear pump are arranged on the tool plate, and a switch assembly used for controlling the telescopic end of the first driving mechanism and the telescopic end of the second driving mechanism to stretch out and draw back at the same time is arranged on the workbench. Compared with the prior art, the press fitting device has the advantages that in the press fitting process of the copper sleeve, the two sides of the copper sleeve are stressed evenly, the situation that the gear pump is pressed to deform or be damaged is reduced, the copper sleeve clamping position is transversely arranged, the copper sleeve does not slide off, the gravity of the copper sleeve does not need to be overcome, and the copper sleeve does not slide off.

Description

Technical Field

[0001] The utility model relates to the technical field of gear pumps, in particular to an automatic copper sleeve pressing device for a gear pump. Background Art

[0002] When a gear pump is working, the agitation and friction of the liquid can easily cause wear between the gears and other metal parts. If used improperly, this can even lead to problems such as gear seizure and increased noise. Copper sleeves are relatively soft metal materials with good wear resistance. Pressing copper sleeves into a gear pump can reduce wear between the gears and the pump body, extending the service life of the gear pump. To facilitate the pressing of copper sleeves into gear pumps, a number of copper sleeve press-fit devices have appeared on the market.

[0003] For example, the Chinese utility model patent "A gear pump shaft sleeve pressing device" with patent publication number CN110539151A includes a base with columns fixed on both sides of the base, the two columns are provided with the same pressure plate and a fixed plate located above the pressure plate, and a pull plate and a pressure shaft are provided in the middle of the top of the fixed plate. The pressure shaft is connected to an external hydraulic press, and two pressure heads are fixedly installed at the bottom end of the fixed plate. Two second guide sleeves for placing bushings and matching the pressure heads are embedded on the pressure plate. Two through holes are opened inside the base, and positioning pins for placing the shaft sleeves are provided inside the two through holes.

[0004] When the above solution is used, the sleeve is placed on the positioning pin, the bushing is inserted into the second guide sleeve, and the press is used to drive the pressing shaft downward to press the sleeve into the sleeve. During the process of pressing the sleeve into the sleeve, the sleeve is only subjected to pressure from top to bottom, which is prone to uneven force and may cause the sleeve to be crushed and deformed. In addition, when the sleeve is placed in the second guide sleeve, the sleeve may slip or wear against the second guide sleeve. Utility Model Content

[0005] The utility model aims to solve the problem that uneven force is easily applied when a bushing is pressed into a shaft sleeve in a gear pump shaft sleeve pressing device, which may cause the bushing to be crushed and deformed. The technical problem to be solved by the utility model is to provide an automatic copper sleeve pressing device for a gear pump to solve the above problem.

[0006] The technical solution adopted by the utility model to solve the above-mentioned technical problems is as follows: it includes a workbench, and a retractable first drive mechanism and a second drive mechanism are provided on both sides of the workbench, the retractable end of the first drive mechanism is fixedly connected to a copper sleeve push rod, and the retractable end of the second drive mechanism is provided with an extrusion plate, and the middle of the first drive mechanism and the second drive mechanism is provided with a tooling plate for placing a gear pump, and the tooling plate is provided with a copper sleeve clamping position for clamping the copper sleeve and a positioning pin for positioning the gear pump, and the workbench is provided with a switch assembly for simultaneously controlling the extension and retraction of the retractable ends of the first drive mechanism and the second drive mechanism. When working, the copper sleeve is placed in the copper sleeve clamping position, and the gear pump is placed on the positioning pin so that the gear pump to be pressed hole corresponds to the copper sleeve clamping position. When the switch assembly is turned on, the retractable ends of the first drive mechanism and the second drive mechanism move toward each other at the same time, and the copper sleeve push rod pushes the copper sleeve into the hole to be pressed, and at the same time, the extrusion plate presses the gear pump with the same force.

[0007] A further preferred solution of the present utility model is: the first driving mechanism includes a first oil cylinder and a mounting plate fixedly connected to the end of the telescopic rod of the first oil cylinder, the copper sleeve push rod is fixed on the mounting plate, the second driving mechanism includes a second oil cylinder and the extrusion plate, the extrusion plate is fixed to the end of the telescopic rod of the second oil cylinder, an oil tank is provided under the workbench, the oil tank and the first oil cylinder, the oil tank and the second oil cylinder are both provided with an oil inlet pipe and an oil outlet pipe that connect the two, and the two oil inlet pipes and the two oil outlet pipes are symmetrically arranged.

[0008] A further preferred solution of the present invention is: the switch assembly includes an oil suction pump and a control button electrically connected to the oil suction pump, the oil suction pump is connected to the oil tank, and the oil suction pump is connected to two oil inlet pipes at the same time through the oil inlet main pipe.

[0009] A further preferred solution of the present invention is that there are two positioning pins, which are respectively located on both sides of the tooling plate.

[0010] A further preferred solution of the present invention is: there are two copper sleeve clamping positions, and there are two copper sleeve push rods, which respectively correspond to the copper sleeve clamping positions one by one.

[0011] A further preferred solution of the present utility model is: guide rails are provided on both sides of the workbench, and sliders that can slide along the guide rails are fixedly provided at the bottom of the first drive mechanism and the second drive mechanism, and the first drive mechanism and the second drive mechanism can slide on the guide rails through the sliders to adjust the positions of the first drive mechanism and the second drive mechanism.

[0012] A further preferred solution of the present invention is that the guide rails are provided in two groups, each group having two rails, and the two groups of guide rails are respectively located on both sides of the workbench.

[0013] A further preferred solution of the present invention is: a plurality of threaded holes are provided on the workbench, mounting holes are provided on the first drive mechanism and the second drive mechanism, and screws pass through the mounting holes and the threaded holes in sequence to fix the first drive mechanism and the second drive mechanism to the workbench.

[0014] A further preferred solution of the present invention is that the workbench is provided with scale lines for measuring the distances from the first drive mechanism and the second drive mechanism to the tooling plate.

[0015] A further preferred solution of the present invention is that the zero scale position of the scale line is collinear with the orthographic projection of the center line of the side surface of the tooling plate, and the scale values ​​of the scale line increase successively along both sides of the workbench.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. A first drive mechanism and a second drive mechanism are provided on both sides of the workbench, whose telescopic ends can move toward each other at the same time. A tooling plate for placing a gear pump is provided in the middle of the first drive mechanism and the second drive mechanism. When working, the switch assembly is turned on, and the telescopic ends of the first drive mechanism and the second drive mechanism move toward each other at the same time. The copper sleeve push rod pushes the copper sleeve into the hole to be pressed, and the extrusion plate presses the gear pump with the same force at the same time. The arrangement of the first drive mechanism and the second drive mechanism ensures that the copper sleeve is subjected to force on both sides during the process of being pressed into the hole to be pressed of the gear pump, and the force is relatively uniform, thereby reducing the possibility of the gear pump being deformed or damaged by pressure.

[0018] 2. The copper sleeve is positioned horizontally, so the copper sleeve will not slip. There is no need to overcome the gravity of the copper sleeve, and the copper sleeve will not slip. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be regarded as limiting the scope of the present invention. In addition, unless otherwise specified, the drawings only conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is one of the schematic diagrams of the front three-dimensional structure of the preferred embodiment of the utility model;

[0021] Figure 2 This is the second schematic diagram of the rear three-dimensional structure of the preferred embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the preferred embodiment of the utility model after the gear pump is disassembled;

[0023] Figure 4This is the preferred embodiment of the utility model Figure 2 A partial enlarged view of the middle part;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the gear pump and copper sleeve according to the preferred embodiment of the present utility model.

[0025] In the figure: 1. workbench; 2. first drive mechanism; 21. copper sleeve push rod; 22. first oil cylinder; 23. mounting plate; 24. telescopic rod; 3. second drive mechanism; 31. second oil cylinder; 32. extrusion plate; 4. tooling plate; 41. copper sleeve position; 42. locating pin; 44. copper sleeve; 5. gear pump; 51. hole to be pressed; 52. locating hole; 6. oil tank; 61. oil inlet pipe; 62. oil outlet pipe; 7. switch assembly; 71. oil suction pump; 72. control button; 8. guide rail; 9. slider; 10. L-shaped mounting seat. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0027] It should be noted that like reference numerals denote like items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0028] This embodiment mainly describes the automatic copper sleeve pressing device for the gear pump, as follows:

[0029] like Figures 1 to 5As shown, the automatic copper sleeve pressing device for the gear pump includes a workbench 1, and a retractable first drive mechanism 2 and a second drive mechanism 3 are provided on both sides of the workbench 1. The retractable end of the first drive mechanism 2 is fixedly connected to the copper sleeve 44 push rod 21, and the retractable end of the second drive mechanism 3 is provided with an extrusion plate 32. A tooling plate 4 for placing the gear pump 5 is provided in the middle of the first drive mechanism 2 and the second drive mechanism 3. A copper sleeve clamping position 41 for clamping the copper sleeve 44 and a positioning pin 42 for positioning the gear pump 5 are provided on the tooling plate 4. The gear pump 5 is provided with a positioning pin 42 that cooperates with the positioning pin 42. The workbench 1 is provided with a switch assembly 7 that simultaneously controls the extension and retraction of the telescopic ends of the first drive mechanism 2 and the second drive mechanism 3. During operation, the copper sleeve 44 is placed in the copper sleeve position 41, and the positioning hole 52 of the gear pump 5 is placed on the positioning pin 42 so that the gear pump 5 pressure hole 51 corresponds to the copper sleeve position 41. The switch assembly 7 is turned on, and the telescopic ends of the first drive mechanism 2 and the second drive mechanism 3 move toward each other at the same time. The push rod 21 of the copper sleeve 44 pushes the copper sleeve 44 into the pressure hole 51, and at the same time, the extrusion plate 32 presses the gear pump 5 with the same force. The arrangement of the first drive mechanism 2 and the second drive mechanism 3 ensures that the copper sleeve 44 is subjected to force on both sides during the process of being pressed into the pressure hole 51 of the gear pump 5. The force is relatively uniform, which reduces the possibility of the gear pump 5 being deformed or damaged by pressure. In addition, in the prior art, the second guide sleeve is arranged vertically, and the bushing is easy to fall off. In order to prevent the bushing from falling off, the bushing is fitted with the second guide sleeve so that the friction between the bushing and the second guide sleeve is greater than the gravity of the bushing. However, during press-fitting, the copper sleeve 44 and the copper sleeve clamping position 41 are worn. In this solution, the copper sleeve clamping position 41 is arranged horizontally, and the copper sleeve 44 will not slip off. There is no need to overcome the gravity of the copper sleeve 44, and the copper sleeve 44 will not slip off.

[0030] Specifically, the first driving mechanism 2 includes a first oil cylinder 22 and a mounting plate 23 fixedly connected to the end of the telescopic rod 24 of the first oil cylinder 22, the copper sleeve 44 push rod 21 is fixed on the mounting plate 23, the second driving mechanism 3 includes a second oil cylinder 31 and an extrusion plate 32, the extrusion plate 32 is fixed to the end of the telescopic rod 24 of the second oil cylinder 31, and an oil tank 6 is provided under the workbench 1. The oil tank 6 and the first oil cylinder 22, the oil tank 6 and the second oil cylinder 31 are all provided with an oil inlet pipe 61 and an oil outlet pipe 62 that connects the two. The two oil inlet pipes 61 and the two oil outlet pipes 62 are symmetrically arranged. When the switch assembly 7 is turned on, the two oil inlet pipes 61 are filled with oil at the same time, so that the telescopic rods 24 of the first oil cylinder 22 and the second oil cylinder 31 are extended and retracted at the same time, generating push and pull with equal force, so that the copper sleeve 44 is subjected to more uniform force when pressed into the hole to be pressed 51.

[0031] Specifically, the switch assembly 7 includes an oil suction pump 71 and a control button 72 electrically connected to the oil suction pump 71. The oil suction pump 71 is connected to the oil tank 6. The oil suction pump 71 is connected to the two oil inlet pipes 61 at the same time through the oil inlet main pipe. When the oil suction pump 71 is turned on by pressing the control button 72, the oil suction pump 71 sucks the hydraulic oil in the oil tank 6. Under the action of the oil suction pump 71, the hydraulic oil is diverted from the oil suction main pipe to the two oil inlet pipes 61 and simultaneously supplies oil to the first oil cylinder 22 and the second oil cylinder 31, so that the telescopic rods 24 of the first oil cylinder 22 and the second oil cylinder 31 are pushed out at the same time, and the thrust is equal, and the copper sleeve 44 is evenly stressed during the process of being pressed into the hole to be pressed 51.

[0032] Specifically, there are two locating pins 42, which are located on both sides of the tooling plate 4. The locating holes 52 on the gear pump 5 correspond one-to-one to the locating pins 42. The setting of the locating pins 42 makes the positioning of the gear pump 5 more accurate, thereby ensuring that the copper sleeve 44 can be pressed into the hole to be pressed 51 quickly and accurately.

[0033] Specifically, there are two copper sleeve positions 41 located inside the two positioning pins 42, and there are two copper sleeve push rods 21 that correspond one to one with the copper sleeve positions 41. Setting two copper sleeve positions 41 can improve work efficiency and save costs.

[0034] Specifically, guide rails 8 are provided on both sides of the workbench 1. Sliders 9 that can slide along the guide rails 8 are fixedly provided at the bottom of the first cylinder of the first drive mechanism 2 and the second cylinder of the second drive mechanism 3. The first cylinder and the second cylinder can slide on the guide rails 8 via the slides 9 to adjust the positions of the first drive mechanism 2 and the second drive mechanism 3. Preferably, there are two sets of guide rails 8, each set having two rails, and the two sets of guide rails 8 are respectively located on both sides of the workbench 1. There are also two slides 9 at the bottom of the first cylinder and the second cylinder, and they correspond one-to-one to the guide rails 8. The provision of two sets of guide rails 8 can enhance the stability of the first drive mechanism 2 and the second drive mechanism 3.

[0035] Specifically, the workbench 1 is provided with a plurality of threaded holes, which are located on both sides of each set of guide rails 8. The first drive mechanism 2 and the second drive mechanism 3 are provided with mounting holes. Specifically, the first oil cylinder 22 and the second oil cylinder 31 are fixedly mounted on the L-shaped mounting seat 10, and the mounting holes are provided on both sides of the L-shaped mounting seat 10. The slider 9 is fixed to the bottom of the L-shaped mounting seat 10 by screws. When the mounting hole on the first oil cylinder 22 corresponds to the threaded hole at the required position, the screw passes through the mounting hole and the threaded hole in sequence to fix the first oil cylinder 22 and the second oil cylinder 31 to the workbench 1.

[0036] Specifically, the workbench 1 is provided with scale lines for measuring the distance from the first cylinder 22 of the first drive mechanism 2 and the second cylinder 31 of the second drive mechanism 3 to the tooling plate 4. The zero scale position of the scale lines is collinear with the positive projection of the center line of the side of the tooling plate 4, and the scale values ​​of the scale lines increase successively along both sides of the workbench 1. By using the scale plate as a reference, the positions of the first cylinder 22 and the second cylinder 31 on both sides of the workbench 1 can be adjusted to meet work needs.

[0037] During operation, place the copper sleeve 44 in the copper sleeve clamping position 41, place the positioning hole 52 of the gear pump 5 on the positioning pin 42 so that the gear pump 5 pressure hole 51 corresponds to the copper sleeve clamping position 41, press the control button 72, and the telescopic rods 24 of the first oil cylinder 22 and the second oil cylinder 31 move toward each other at the same time. The push rod 21 of the copper sleeve 44 on the first oil cylinder 22 extends into the copper sleeve clamping position 41 to push the copper sleeve 44 into the pressure hole 51. At the same time, under the push of the telescopic rod 24 of the second oil cylinder 31, the pressure is squeezed. The pressure plate 32 presses the gear pump 5 with the same force at the same time. Under the thrust of the first oil cylinder 22 and the second oil cylinder 31, the copper sleeve 44 is evenly pressed into the pressure hole 51. When the copper sleeve 44 is pressed in, the control button 72 is pressed again, and the hydraulic oil in the first oil cylinder 22 and the second oil cylinder 31 returns to the oil tank 6 through the oil outlet pipe 62. The telescopic rods 24 of the first oil cylinder 22 and the second oil cylinder 31 return to their positions at the same time, and the gear pump 5 with the copper sleeve 44 pressed is removed.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0039] The above is a detailed introduction to the automatic copper sleeve pressing device for the gear pump provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. Automatic copper sleeve pressing device for gear pump, including a workbench, characterized by: A retractable first drive mechanism and a second drive mechanism are provided on both sides of the workbench, the retractable end of the first drive mechanism is fixedly connected to a copper sleeve push rod, the retractable end of the second drive mechanism is provided with an extrusion plate, and a tooling plate for placing a gear pump is provided in the middle of the first drive mechanism and the second drive mechanism, and a copper sleeve clamping position for clamping the copper sleeve and a positioning pin for positioning the gear pump are provided on the tooling plate. A switch assembly for simultaneously controlling the extension and retraction of the retractable ends of the first drive mechanism and the second drive mechanism is provided on the workbench. When working, the copper sleeve is placed in the copper sleeve clamping position, and the gear pump is placed on the positioning pin so that the gear pump to be pressed hole corresponds to the copper sleeve clamping position. The switch assembly is turned on, and the retractable ends of the first drive mechanism and the second drive mechanism move toward each other at the same time, and the copper sleeve push rod pushes the copper sleeve into the hole to be pressed, and at the same time, the extrusion plate presses the gear pump with the same force.

2. The automatic copper sleeve pressing device for a gear pump according to claim 1, characterized in that: The first driving mechanism includes a first oil cylinder and a mounting plate fixedly connected to the end of the telescopic rod of the first oil cylinder, and the copper sleeve push rod is fixed on the mounting plate. The second driving mechanism includes a second oil cylinder and the extrusion plate, and the extrusion plate is fixed to the end of the telescopic rod of the second oil cylinder. An oil tank is provided under the workbench, and the oil tank and the first oil cylinder, and the oil tank and the second oil cylinder are both provided with an oil inlet pipe and an oil outlet pipe that connect the two, and the two oil inlet pipes and the two oil outlet pipes are symmetrically arranged.

3. The automatic copper sleeve pressing device for a gear pump according to claim 2, characterized in that: The switch assembly includes an oil suction pump and a control button electrically connected to the oil suction pump. The oil suction pump is connected to the oil tank. The oil suction pump is connected to two oil inlet pipes at the same time through an oil inlet main pipe.

4. The automatic copper sleeve pressing device for a gear pump according to claim 1, characterized in that: There are two positioning pins, which are respectively located on both sides of the tooling plate.

5. The automatic copper sleeve pressing device for a gear pump according to claim 1, characterized in that: There are two copper sleeve clamping positions, and there are two copper sleeve push rods, which respectively correspond to the copper sleeve clamping positions one by one.

6. The automatic copper sleeve pressing device for a gear pump according to claim 1, characterized in that: Guide rails are provided on both sides of the workbench, and sliders that can slide along the guide rails are fixedly provided at the bottom of the first driving mechanism and the second driving mechanism. The first driving mechanism and the second driving mechanism can slide on the guide rails through the sliders to adjust the positions of the first driving mechanism and the second driving mechanism.

7. The automatic copper sleeve pressing device for a gear pump according to claim 6, characterized in that: The guide rails are provided in two groups, each group having two rails, and the two groups of guide rails are respectively located on both sides of the workbench.

8. The automatic copper sleeve pressing device for a gear pump according to claim 6, characterized in that: The workbench is provided with a plurality of threaded holes, the first drive mechanism and the second drive mechanism are provided with mounting holes, and the screws pass through the mounting holes and the threaded holes in sequence to fix the first drive mechanism and the second drive mechanism on the workbench.

9. The automatic copper sleeve pressing device for a gear pump according to claim 6, characterized in that: The workbench is provided with scale lines for measuring the distances from the first drive mechanism and the second drive mechanism to the tooling plate.

10. The automatic copper sleeve pressing device for a gear pump according to claim 9, characterized in that: The zero scale position of the scale line is collinear with the positive projection of the center line of the side surface of the tooling plate, and the scale values ​​of the scale line increase successively along both sides of the workbench.

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