Electric control two-stage high-flow oil supply device for hydraulic steel rail stretcher

Abstract

The utility model discloses an electric control two-stage high-flow oil supply device for a hydraulic steel rail stretcher, which relates to the technical field of hydraulic oil supply and comprises a front cover, the outer wall of the front cover is in threaded connection with a rear cover, a rotor component is rotatably connected between the front cover and the rear cover, the rotor component and the front cover are eccentrically arranged, and the rotor component is connected with the rear cover through a rotating shaft. A plurality of sets of piston columns are arranged on the inner wall of the rotor assembly in a sliding mode, the tail ends of the piston columns are fixedly connected with sliding rods, and the sliding rods are connected to the side wall of the front cover in a sliding mode. According to the utility model, the sliding rod is arranged at the tail end of the piston column, and the sliding rod is connected with the sliding groove, so that the piston column is directly inserted into the rotor main body in the installation process, and the rotor main body and the front cover can be smoothly installed together only by aligning the sliding rod with the sliding groove when the rotor main body is placed into the front cover; and therefore, the plunger pump is more rapid and convenient to assemble, and the working efficiency during maintenance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil supply, in particular to an electrically controlled two-stage large-flow oil supply device for a hydraulic rail stretching machine. Background Art

[0002] As a high-efficiency hydraulic oil pump, the radial piston pump has unique performance characteristics. It is not restricted by the steering direction of the drive motor. At the same time, because its piston pump works in a valve distribution mode, its output efficiency is extremely high and it is widely used. It is irreplaceable by other types of hydraulic oil pumps and is often used in industrial equipment such as ultra-high pressure hydraulic lifting tools, ultra-large hydraulic forging presses, and ultra-high pressure engineering testing machines.

[0003] The existing radial piston pump includes a transmission shaft, an eccentric bearing, a plunger piston, and a plunger cylinder. The eccentric bearing is fixed on the transmission shaft and has an eccentric distance with the transmission shaft. The transmission shaft drives the rotation of the eccentric bearing. The eccentric bearing cooperates with the plunger piston. During the rotation of the eccentric bearing, the plunger piston performs reciprocating linear motion in the plunger cylinder, so that the space in the plunger cylinder increases and decreases alternately, thereby realizing liquid inlet and discharge, and outputting power outward. However, in the radial piston pump of the prior art, the eccentric bearing sleeve is circular, and the fitting friction surface between the plunger piston and the eccentric bearing sleeve is in line contact. The friction surface in line contact can hardly produce a static pressure oil film, which greatly reduces the working life of the plunger and the circular bearing sleeve, and the high-pressure output capacity generated is also greatly reduced.

[0004] An ultra-high pressure radial piston pump disclosed in an existing patent (publication number: CN217682237U) includes a plurality of plunger pistons and an eccentric bearing; the characteristic is that it also includes a bearing sleeve; the bearing sleeve is a regular prism; the bearing sleeve is provided with a first circular through hole running through both ends of the bearing sleeve along the axis; the eccentric bearing is nested in the bearing sleeve; the outer wall of the eccentric bearing is connected to the inner wall of the first circular through hole; all the plunger pistons are arranged around the eccentric bearing; one end of all the plunger pistons rests against the outer wall of the bearing sleeve respectively; the axes of the plurality of plunger pistons are located in the same plane and are perpendicular to the axis of the eccentric bearing; the transmission shaft drives the eccentric bearing to rotate; the plunger piston automatically follows and is supported on the outer wall of the bearing sleeve as the eccentric bearing rotates, and by changing the outer layer of the bearing sleeve into a regular prism, the service life of the plunger and the eccentric bearing sleeve is extended, and the output pressure of the radial piston pump is increased.

[0005] However, the above technical solution still has certain defects. During use, when the plunger pump needs maintenance, the rotor and stator need to be assembled after the maintenance is completed. At this time, all plungers must be placed in specific positions, otherwise the stator and the device cannot be assembled together, which makes the installation process too troublesome and inconvenient, and the work efficiency during maintenance is reduced. For this reason, an electrically controlled two-stage large-flow oil supply device for a hydraulic rail stretching machine is proposed. Utility Model Content

[0006] Based on this, the purpose of the utility model is to provide an electrically controlled two-stage large-flow oil supply device for a hydraulic rail stretching machine to solve the technical problems raised in the above background.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electrically controlled two-stage large-flow oil supply device for a hydraulic rail stretching machine, comprising a front cover, the outer wall of the front cover is threadedly connected to a rear cover, a rotor assembly is rotatably connected between the front cover and the rear cover, the rotor assembly and the front cover are eccentrically arranged, a plurality of groups of piston columns are slidably arranged on the inner wall of the rotor assembly, the ends of the piston columns are fixedly connected to sliding rods, the sliding rods are slidably connected to the side walls of the front cover, and the front cover is provided with a sliding groove at the contact position with the sliding rod.

[0008] As a preferred technical solution of an electrically controlled two-stage large flow oil supply device for a hydraulic rail stretching machine of the utility model, the rotor assembly includes a rotor body, and the inner wall of the rotor body is provided with multiple groups of chambers.

[0009] As a preferred technical solution of an electrically controlled two-stage large-flow oil supply device for a hydraulic rail stretching machine of the utility model, each group of sliding rods is slidably connected to the inner wall of a group of chambers.

[0010] As an optimal technical solution of an electrically controlled two-stage large-flow oil supply device for a hydraulic rail stretching machine of the utility model, the side wall of the rotor body is fixedly connected with a connecting rod, the connecting rod extends to the outside of the rear cover, and the side wall of the connecting rod is slidably connected with an abutment block.

[0011] As an optimal technical solution of an electrically controlled two-stage large-flow oil supply device for a hydraulic rail stretching machine of the utility model, the outer wall of the connecting rod is threadedly connected with a rotating sleeve, the rotating sleeve sliding sleeve is arranged on the outer wall of the abutment block, and the rotating sleeve is provided with an inclined groove at the contact position with the abutment block.

[0012] As an optimal technical solution of an electrically controlled two-stage large-flow oil supply device for a hydraulic rail stretching machine of the utility model, the inner wall of the rotor body is rotatably connected with a diverter component, and the diverter component includes a rotating block, which is rotatably connected to the inner wall of the rotor body, and the inner wall of the rotating block is fixedly connected with a sealing partition.

[0013] As an optimal technical solution of an electrically controlled two-stage large-flow oil supply device for a hydraulic rail stretching machine of the utility model, the inner wall of the rotating block is connected to an oil outlet, and the inner wall of the rotating block is connected to an oil inlet, and the oil outlet and the oil inlet are respectively located on both sides of the sealed partition.

[0014] In summary, the utility model mainly has the following beneficial effects:

[0015] 1. The utility model provides a sliding rod at the end of the piston rod, and connects the sliding rod with the slide groove, so that during the installation process, the piston rod is directly inserted into the rotor body. When the rotor body is placed in the front cover, the sliding rod is aligned with the slide groove to smoothly install the rotor body with the front cover, thereby making the plunger pump more rapid and convenient during assembly, and improving the work efficiency during maintenance;

[0016] 2. The utility model inserts the output end of the motor into the connecting rod and then pushes the rotating sleeve to rotate, so that the abutment block can be tightly abutted against the output end of the motor, so that the motor and the plunger pump are firmly installed together, so that the installation of the plunger pump can be faster, and the plunger pump and the motor can be quickly separated, so that the plunger pump can be quickly separated from the motor during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the utility model from a side view;

[0019] Figure 3 It is a rear-view explosion structure schematic diagram of the utility model;

[0020] Figure 4 This is a schematic diagram of the main cross-sectional structure of the rotor body of the utility model;

[0021] Figure 5 It is a schematic diagram of the side cross-sectional structure of the rotor body of the utility model.

[0022] In the figure: 1, front cover; 2, rear cover; 3, rotor assembly; 4, diverter assembly; 5, piston rod; 6, sliding rod; 7, slide groove;

[0023] 301, rotor body; 302, chamber; 303, connecting rod; 304, rotating sleeve; 305, abutment block; 306, chute;

[0024] 401, rotating block; 402, oil outlet; 403, oil inlet; 404, sealing partition. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0026] The following describes an embodiment of the utility model based on its overall structure.

[0027] An electrically controlled two-stage high-flow oil supply device for a hydraulic rail stretching machine, such as Figures 1 to 5 As shown, it includes a front cover 1, the outer wall of the front cover 1 is threadedly connected to the rear cover 2, a rotor assembly 3 is rotatably connected between the front cover 1 and the rear cover 2, the rotor assembly 3 and the front cover 1 are eccentrically arranged, and the inner wall of the rotor assembly 3 is slidably provided with multiple groups of piston rods 5, the ends of the piston rods 5 are fixedly connected to the sliding rods 6, the sliding rods 6 are slidably connected to the side wall of the front cover 1, and the front cover 1 is provided with a sliding groove 7 at the contact position with the sliding rod 6. The rotor assembly 3 includes a rotor body 301, and the inner wall of the rotor body 301 is provided with multiple groups of chambers 302. Each group of sliding rods 6 is respectively slidably connected to the inner wall of a group of chambers 302, and the inner wall of the rotor body 301 is rotatably connected to a diverter assembly 4, the diverter assembly 4 includes a rotating block 401, the rotating block 401 is rotatably connected to the inner wall of the rotor body 301, the inner wall of the rotating block 401 is fixedly connected to a sealing partition 404, the inner wall of the rotating block 401 is connected to an oil outlet 402, the inner wall of the rotating block 401 is connected to an oil inlet 403, and the oil outlet 402 and the oil inlet 403 are respectively located on both sides of the sealing partition 404.

[0028] The motor drives the rotor body 301 to rotate, and the rotor body 301 drives the chamber 302 to rotate during the rotation process, so that the chamber 302 drives the piston column 5 to rotate, and the piston column 5 drives the sliding rod 6 to slide inside the sliding groove 7 during the rotation process. Since the rotor body 301 and the front cover 1 are eccentrically arranged, when the piston column 5 rotates from the bottom to the top with the rotor body 301, the distance between the rotor body 301 and the front cover 1 is reduced, so that the sliding rod 6 is pushed by the sliding groove 7. At this time, the piston column 5 extends into the chamber 302, thereby pushing the hydraulic oil inside the chamber 302 into the oil outlet 402. When the piston column 5 rotates from the top to the bottom, along with the rotor body 301 and the front cover 1 is reduced, so that the sliding rod 6 moves away from the rotor body 301 along the slide groove 7, and the piston column 5 slides out of the chamber 302, thereby generating a negative pressure inside the chamber 302, so that the hydraulic oil is sucked from the oil inlet 403. During the disassembly and installation process, the piston column 5 is inserted into the chamber 302, and then it is only necessary to align the sliding rod 6 with the slide groove 7 to install the rotor body 301 into the front cover 1, and then fix it with bolts to complete the installation. The oil inlet 403 and the oil outlet 402 are connected to the hydraulic oil tank through metal pipes and various valves, and the rotating block 401 and the rotor body 301 are rotatably connected, so the rotating block 401 will not rotate during the rotation of the rotor body 301.

[0029] Please refer to Figure 5The side wall of the rotor body 301 is fixedly connected with a connecting rod 303, and the connecting rod 303 extends to the outside of the rear cover 2. The side wall of the connecting rod 303 is slidably connected with an abutment block 305. The outer wall of the connecting rod 303 is threadedly connected with a rotating sleeve 304, and the rotating sleeve 304 is slidably sleeved on the outer wall of the abutment block 305. The rotating sleeve 304 is provided with an inclined groove 306 at the contact position with the abutment block 305.

[0030] By inserting the output end of the motor into the connecting rod 303 and then twisting the rotating sleeve 304, the rotating sleeve 304 is moved closer to the motor under the action of the thread, thereby driving the inclined groove 306 to move, so that the inclined groove 306 pushes the abutment block 305. At this time, the abutment block 305 is pushed by the inclined groove 306 to slide into the connecting rod 303, so that the abutment block 305 is tightly abutted against the output end of the motor, thereby connecting the motor and the plunger pump together.

[0031] When in use, a sliding rod 6 is provided at the end of the piston column 5, and the sliding rod 6 is connected to the slide groove 7, so that during the installation process, the piston column 5 can be directly inserted into the rotor body 301. When the rotor body 301 is placed in the front cover 1, the sliding rod 6 is aligned with the slide groove 7, so that the rotor body 301 can be smoothly installed together with the front cover 1, thereby making the plunger pump faster and more convenient during assembly, and improving the work efficiency during maintenance. The parts not involved in the device are the same as the prior art or can be implemented by the prior art.

[0032] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. An electrically controlled two-stage large flow oil supply device for a hydraulic rail stretching machine, comprising a front cover (1), characterized in that: The outer wall of the front cover (1) is threadedly connected to the rear cover (2); a rotor assembly (3) is rotatably connected between the front cover (1) and the rear cover (2); the rotor assembly (3) and the front cover (1) are eccentrically arranged; a plurality of groups of piston rods (5) are slidably arranged on the inner wall of the rotor assembly (3); the ends of the piston rods (5) are fixedly connected to sliding rods (6); the sliding rods (6) are slidably connected to the side wall of the front cover (1); and a sliding groove (7) is provided at a position where the front cover (1) contacts the sliding rods (6).

2. The electronically controlled two-stage large flow oil supply device for a hydraulic rail stretching machine according to claim 1, characterized in that: The rotor assembly (3) comprises a rotor body (301), and the inner wall of the rotor body (301) is provided with a plurality of chambers (302).

3. The electronically controlled two-stage large flow oil supply device for a hydraulic rail stretching machine according to claim 2, characterized in that: Each group of sliding rods (6) is slidably connected to the inner wall of a group of chambers (302).

4. The electronically controlled two-stage large flow oil supply device for a hydraulic rail stretching machine according to claim 2, characterized in that: The side wall of the rotor body (301) is fixedly connected to a connecting rod (303), the connecting rod (303) extends to the outside of the rear cover (2), and the side wall of the connecting rod (303) is slidably connected to an abutment block (305).

5. The electrically controlled two-stage large flow oil supply device for a hydraulic rail stretching machine according to claim 4, characterized in that: The outer wall of the connecting rod (303) is threadedly connected with a rotating sleeve (304), and the rotating sleeve (304) is slidably sleeved on the outer wall of the abutment block (305). The rotating sleeve (304) is provided with an inclined groove (306) at the contact position with the abutment block (305).

6. The electrically controlled two-stage large flow oil supply device for a hydraulic rail stretching machine according to claim 2, characterized in that: The inner wall of the rotor body (301) is rotatably connected to a flow diversion component (4), and the flow diversion component (4) comprises a rotating block (401), the rotating block (401) is rotatably connected to the inner wall of the rotor body (301), and the inner wall of the rotating block (401) is fixedly connected to a sealing partition (404).

7. The electrically controlled two-stage large flow oil supply device for a hydraulic rail stretching machine according to claim 6, characterized in that: The inner wall of the rotating block (401) is connected to an oil outlet (402), and the inner wall of the rotating block (401) is connected to an oil inlet (403). The oil outlet (402) and the oil inlet (403) are respectively located on two sides of the sealing partition (404).

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