Hydraulic jack assembly

Abstract

The hydraulic jack assembly comprises a hydraulic jack, a lead screw, a pressure-bearing plate and two supporting plates, the pressure-bearing plate comprises a pressure-bearing part, the pressure-bearing part is provided with a lead screw hole, the pressure-bearing plate further comprises two clamping parts which are symmetrically arranged relative to the central axis of the lead screw hole, clamping grooves matched with the clamping parts are formed in the supporting plates, and the number of the supporting plates is two. The two clamping parts are clamped in the clamping grooves of the two supporting plates in a matched mode respectively, and the clamping matching portions of the two clamping parts are the same. According to the utility model, the two clamping parts are symmetrical about the central axis of the screw rod hole, the two clamping parts are respectively clamped and matched in the two clamping grooves, and the clamping and matching parts of the two clamping parts are the same, so that the two supporting plates can be ensured to be symmetrical about the central axis of the screw rod hole. In the process of drawing the planet shaft, due to the fact that the two supporting plates are symmetrical about the central axis of the pressure bearing plate, the two supporting plates are stressed in a balanced mode, the supporting plates can be effectively prevented from toppling over, and the planet shaft is prevented from inclining.

Description

Technical Field

[0001] The utility model relates to the field of drawing and pressing of planetary shafts, in particular to a hydraulic jack assembly. Background Art

[0002] The nuclear power gearbox is a planetary gear system. When overhauling the nuclear power gearbox, the planetary gear shaft needs to be disassembled. The planetary gear shaft and the planet carrier are interference fits, and usually a hydraulic jack assembly is required to pull the planetary gear shaft. After the overhaul is completed, the planetary gear shaft is reinstalled with the help of a hydraulic jack assembly.

[0003] Please refer to the attached Figure 1 The hydraulic jack assembly includes a hydraulic jack 1a, a pressure plate 2a, a support plate 3a, a screw 5a, a first nut 4a, and a second nut 8a. The hydraulic jack 1a is a hollow hydraulic jack, and the piston of the hollow hydraulic jack is a hollow structure. The support plate 3a is a rectangular parallelepiped structure. The pressure plate 2a is a circular plate structure. The first nut 4a and the second nut 8a are threadedly matched with the screw 5a. The screw 5a can penetrate the piston of the hydraulic jack 1a. When disassembling the planetary shaft 6a, please refer to the attached Figure 1 In A, place the two support plates 3a on the planetary carrier 7a, place the pressure plate 2a on the two support plates 3a, and place the hydraulic jack 1a on the pressure plate 2a. Make the screw rod 5a pass through the piston of the hydraulic jack 1a and the axial hole of the planetary shaft 6a. Screw the first nut 4a on the upper part of the screw rod 5a, and the first nut 4a is pressed against the upper end surface of the piston. Put a pad 9a on the lower part of the screw rod 5a, and screw on the second nut 8a so that the second nut 8a is pressed against the lower end surface of the planetary shaft 6a. Pull the wrench of the hydraulic jack 1a, the piston moves up, and the piston acts on the planetary shaft 6a through the first nut 4a, the screw rod 5a, and the second nut 8a, forming a pulling force on the planetary shaft 6a to pull the planetary shaft 6a out of the planetary carrier 7a. When pressing in the planetary shaft 6a, please refer to the attached Figure 1 In B, the hydraulic jack 1a is placed on the planetary shaft 6a, and the screw 5a passes through the piston of the hydraulic jack 1a and the axial hole of the planetary shaft 6a. The first nut 4a is rotated on the upper part of the screw 5a so that the first nut 4a is pressed against the upper end face of the piston. The pressure plate 2a and the second nut 8a are mounted on the lower part of the screw 5a, so that the pressure plate 2a is pressed against the lower end face of the planetary carrier 7a, and the second nut 8a is pressed against the lower end face of the pressure plate 2a. Pull the wrench of the hydraulic jack. Since the pressure plate 2a is pressed against the lower end face of the planetary carrier 6a, the piston remains stationary, and the cylinder of the hydraulic jack 1a moves downward, forming a downward thrust on the planetary shaft 6a, so as to press the planetary shaft 6a into the planetary carrier 7a.

[0004] During the process of disassembling the planetary shaft 6a, it is usually impossible to ensure that the two support plates 3a are arranged symmetrically about the central axis of the pressure plate 2a. During the process of pulling the planetary shaft 6a, the two support plates 3a are subjected to uneven force, which may cause the support plates 3a to tip over, or the planetary shaft 6a to tilt, or even damage the planetary shaft 6a.

[0005] Therefore, how to ensure that the two support plates are symmetrically arranged about the central axis of the pressure plate, thereby ensuring that the two support plates are subjected to balanced forces and preventing the support plates from tipping over and the planetary shaft from tilting, is a key issue that needs to be urgently resolved by technical personnel in this field. Utility Model Content

[0006] In view of this, the purpose of the utility model is to ensure that the two support plates are symmetrically arranged about the central axis of the pressure plate, so as to ensure that the two support plates are subjected to balanced forces and prevent the support plates from tipping over and the planetary shaft from tilting.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A hydraulic jack assembly includes a hydraulic jack, a screw, a pressure plate and a support plate, characterized in that the pressure plate includes a pressure-bearing portion, the pressure-bearing portion has a screw hole for the screw to pass through, the pressure plate also includes two clamping portions that are symmetrically arranged about the central axis of the screw hole and connected to the pressure-bearing portion, the support plate is provided with a clamping groove adapted to the clamping portion, there are two support plates, the two clamping portions are respectively clamped in the clamping grooves of the two support plates, and the clamping positions of the two clamping portions are the same.

[0009] Preferably, one end of the clamping portion is connected to the outer peripheral surface of the pressure-bearing portion, and the other end extends in a direction away from the pressure-bearing portion.

[0010] Preferably, the slot opening faces upward, and the slot penetrates the support plate along the extending direction of the clamping portion.

[0011] Preferably, an end surface of the clamping portion away from the pressure-bearing portion is flush with a plate surface of the support plate facing away from the pressure-bearing portion.

[0012] Preferably, in a direction perpendicular to the extending direction of the clamping portion, the size of the clamping portion is smaller than the size of the pressure-bearing portion.

[0013] Preferably, the clamping portion is welded to the pressure-bearing portion.

[0014] Preferably, in the axial direction of the screw hole, the size of the pressure-bearing portion is the same as the size of the clamping portion.

[0015] Preferably, the support plate is made of stainless steel or carbon steel, and the pressure plate is made of stainless steel or carbon steel.

[0016] It can be seen from the above technical solution that in the present invention, the two clamping parts are symmetrical about the central axis of the screw hole, the two clamping parts are respectively clamped in the two clamping grooves, and the clamping parts of the two clamping parts are the same, so it can ensure that the two support plates are symmetrical about the central axis of the screw hole, and the central axis of the screw hole is also the central axis of the pressure plate, so it is also ensured that the two support plates are symmetrical about the central axis of the pressure plate. In the process of pulling the planetary shaft, since the two support plates are symmetrical about the central axis of the pressure plate, the two support plates are balanced in force, which can effectively prevent the support plates from tipping over and prevent the planetary shaft from tilting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of using a hydraulic jack assembly to pull and press in a planetary shaft is disclosed in the prior art;

[0019] Figure 2 Three views of the pressure plate and the support plate provided by the specific embodiment of the utility model, wherein a is a top view of the pressure plate and the support plate, b is a front view of the pressure plate and the support plate, and c is a side view of the pressure plate and the support plate;

[0020] Figure 3 A top view of a pressure plate provided in a specific embodiment of the utility model;

[0021] Figure 4 A front view of a pressure plate provided in a specific embodiment of the utility model;

[0022] Figure 5 A top view of a support plate provided in a specific embodiment of the utility model;

[0023] Figure 6 A side view of a support plate provided in a specific embodiment of the utility model.

[0024] The names of the components are as follows:

[0025] 1a-hydraulic jack, 2a-pressure plate, 3a-support plate, 4a-first nut, 5a-screw, 6a-planet shaft, 7a-planet carrier, 8a-second nut, 9a-shim plate;

[0026] 1-pressure plate, 11-pressure bearing part, 111-screw hole, 12-clamping part, 2-support plate, 21-clamping groove. DETAILED DESCRIPTION

[0027] The core of the utility model is to design a hydraulic jack assembly to ensure that the two support plates are symmetrically arranged about the central axis of the pressure plate, thereby ensuring that the two support plates are subjected to balanced forces and preventing the support plates from tipping over and the planetary shaft from tilting.

[0028] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Please refer to the attached Figure 2 -Attached Figure 6 The utility model discloses a hydraulic jack assembly, which includes a hydraulic jack, a screw, a pressure plate 1 and a support plate 2. The pressure plate 1 includes a pressure-bearing portion 11 and a clamping portion 12. The pressure-bearing portion 11 has a screw hole 111 for the screw to pass through. There are two clamping portions 12, and the two clamping portions 12 are symmetrically arranged about the central axis of the screw hole 111, and the two clamping portions 12 are connected to the pressure-bearing portion 11. A clamping groove 21 is provided on the support plate 2, and the clamping groove 21 is clamped with the clamping portion 12. There are two support plates 2, and the two clamping portions 12 are respectively clamped in the clamping grooves 21 on the two support plates 2, and the clamping parts of the two clamping portions 12 are the same. The clamping part is the part where the clamping portion 12 is clamped into the corresponding clamping groove 21.

[0030] In the present invention, the two clamping parts 12 are symmetrical about the central axis of the screw hole 111, and the two clamping parts 12 are respectively clamped in the two clamping grooves 21, and the clamping parts of the two clamping parts 12 are the same, so it can ensure that the two support plates 2 are symmetrical about the central axis of the screw hole 111, and the central axis of the screw hole 111 is also the central axis of the pressure plate 1, so it is ensured that the two support plates 2 are symmetrical about the central axis of the pressure plate 1. In the process of pulling the planetary shaft, since the two support plates 2 are symmetrical about the central axis of the pressure plate 1, the two support plates 2 are balanced in force, which can effectively prevent the support plates 2 from tipping over and prevent the planetary shaft from tilting.

[0031] Please refer to the attached Figure 3 and attached Figure 4In a specific embodiment of the utility model, the pressure plate 1 is a pick head structure: one end of the clamping portion 12 is connected to the outer peripheral surface of the pressure bearing portion 11, and the other end extends in a direction away from the pressure bearing portion 11. That is, the clamping portion 12 extends radially along the pressure bearing portion 11. The two clamping portions 12 and the pressure bearing portion 11 in the middle constitute a pick head structure. The outer contour of the pressure plate in the prior art is equivalent to a circumscribed circle circumscribed to the two clamping portions 12, while in the utility model, the space between the two clamping portions 12 is hollowed out along the circumferential direction. Therefore, compared with the pressure plate in the prior art, the weight of the pressure plate 1 in this specific implementation is significantly reduced. Please refer to the attached Figure 1 In the B figure, when the planetary shaft is pressed in, the pressure plate needs to be abutted against the lower end surface of the planetary frame, and then the second nut is screwed on. The pressure plate in B figure is heavy, which is not conducive to control. In this specific embodiment, the pressure plate 1 is light, so it is easy to control.

[0032] Please refer to the attached Figure 5 and attached Figure 6 , the slots 21 on the support plate 2 face upward, and the slots 21 penetrate the support plate 2 along the thickness direction of the support plate 2. The thickness direction of the support plate 2 is the extension direction of the clamping portion 12. After placing the two support plates 2 on the planetary carrier, the pressure plate 1 is placed from top to bottom, so that the two clamping portions 12 of the pressure plate 1 enter the corresponding slots 21 through the corresponding slots. In addition, since the slots 21 are through slots in the extension direction of the clamping portion 12, the clamping portion 12 can extend from the side of the through slot, thereby significantly reducing the difficulty of placing the pressure plate 1.

[0033] After placing the pressure plate 1 on the support plate 2, adjust the pressure plate 1 so that the central axis of the screw hole 111 of the pressure plate 1 coincides with the central axis of the shaft hole of the planetary shaft, and adjust the two support plates 2 at the same time so that the two support plates 2 are clamped to the same position of the two clamping parts 12. Then place the hydraulic jack on the pressure part 11. Then make the screw pass through the shaft holes of the hydraulic jack and the planetary shaft. Then screw the first nut on the upper part of the screw so that the first nut abuts against the upper end face of the piston. Screw the second nut on the lower part of the screw so that the second nut abuts against the lower end face of the piston. Then pull the wrench of the hydraulic jack, and the piston drives the planetary shaft to move out of the planetary carrier.

[0034] In a specific embodiment of the present invention, the end surface of the clamping portion 12 away from the pressure-bearing portion 11 is flush with the plate surface of the support plate 2 facing away from the pressure-bearing portion 11. In other words, the outer end surface of the clamping portion 12 is flush with the outer side surface of the support plate 2. In this way, it is convenient to ensure that the two clamping portions 12 and the two clamping slots 21 are at the same position, and it is also convenient to ensure that the two support plates 2 are symmetrical about the central axis of the pressure-bearing plate 1.

[0035] In the specific implementation of the present invention, in the direction perpendicular to the extension direction of the clamping portion 12, the size of the clamping portion 12 is smaller than the size of the pressure-bearing portion 11. Figure 3 , the width of the clamping portion 12 is smaller than the diameter of the pressure-bearing portion 11. Figure 1 In Figure B, when the planet shaft is pressed into the planet carrier, the pressure plate 1 is abutted against the lower end surface of the planet carrier. Figure 1 In the present embodiment, the width of the clamping portion 12 is smaller than the diameter of the pressure-bearing portion 11, so the clamping portion 12 is convenient for manual control, thereby reducing the difficulty of press-fitting.

[0036] The pressure-bearing portion 11 and the clamping portion 12 of the pressure-bearing plate 1 are processed separately, and then the clamping portion 12 is welded to the pressure-bearing portion 11 by welding.

[0037] Preferably, in the axial direction of the screw hole 111, the size of the pressure-bearing portion 11 is equal to the size of the clamping portion 12. Figure 4 , the height of the pressure-bearing part 11 is equal to the height of the clamping part 12. In this way, the welding surface of the clamping part 12 and the pressure-bearing part 11 can be increased to ensure the firmness of the welding.

[0038] Furthermore, the material of the support plate 2 is preferably stainless steel or carbon steel, and the material of the pressure plate 1 is preferably stainless steel or carbon steel.

[0039] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic jack assembly, comprising a hydraulic jack, a screw rod, a pressure plate (1) and a support plate (2), characterized in that: The pressure-bearing plate (1) comprises a pressure-bearing portion (11), the pressure-bearing portion (11) having a screw hole (111) for the screw to pass through, the pressure-bearing plate (1) also comprising two clamping portions (12) symmetrically arranged about the central axis of the screw hole (111) and connected to the pressure-bearing portion (11), the support plate (2) being provided with a clamping groove (21) adapted to the clamping portion (12), the support plates (2) being two, the two clamping portions (12) being respectively clamped in the clamping grooves (21) of the two support plates (2), and the clamping positions of the two clamping portions (12) being the same.

2. The hydraulic jack assembly according to claim 1, characterized in that: One end of the clamping portion (12) is connected to the outer peripheral surface of the pressure-bearing portion (11), and the other end extends in a direction away from the pressure-bearing portion (11).

3. The hydraulic jack assembly according to claim 2, characterized in that: The notch of the card slot (21) faces upward, and the card slot (21) penetrates the support plate (2) along the extension direction of the card portion (12).

4. The hydraulic jack assembly according to claim 3, characterized in that: The end surface of the clamping portion (12) away from the pressure-bearing portion (11) is flush with the plate surface of the support plate (2) facing away from the pressure-bearing portion (11).

5. The hydraulic jack assembly according to claim 1, characterized in that: In a direction perpendicular to the extending direction of the clamping portion (12), the size of the clamping portion (12) is smaller than the size of the pressure-bearing portion (11).

6. The hydraulic jack assembly according to claim 1, characterized in that: The clamping portion (12) is welded to the pressure-bearing portion (11).

7. The hydraulic jack assembly according to claim 6, characterized in that: In the axial direction of the screw rod hole, the size of the pressure-bearing portion (11) is the same as the size of the clamping portion (12).

8. The hydraulic jack assembly according to claim 1, characterized in that: The support plate (2) is made of stainless steel or carbon steel, and the pressure plate (1) is made of stainless steel or carbon steel.

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