Tool for replacing oil seal in hydraulic oil pump

Abstract

The tool for replacing the oil seal in the hydraulic oil pump comprises a main supporting cross rod, a first screw rod, an ejector rod and a second screw rod, a pair of installation through holes are formed in the main supporting cross rod and used for fixing the main supporting cross rod to the end face of a motor installation base, the second screw rod is assembled on the main supporting cross rod, and it is guaranteed that when the second screw rod is rotated, the first screw rod is rotated. The first screw rod is assembled on the main supporting cross rod, the tail end of the ejector rod is in threaded connection with the front end of the first screw rod, and the ejector rod and the first screw rod are connected into a whole. The transverse displacement generated by the ejector rod acts on the circle center of the end face of the oil pump spindle and fixes the oil pump spindle. Pressure is always provided for the oil pump main shaft or the oil pump main bearing end in the oil seal replacement process, the situation that the oil pump main shaft moves outwards is prevented, and negative effects caused by movement of the oil pump main shaft are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic equipment frock technical field, concretely relates to a frock for replacing oil seal in hydraulic oil pump. BACKGROUND

[0002] In the hydraulic equipment of the ship, there is usually a hydraulic oil pump used in the hydraulic rudder and the side thrust, and one of the maintenance work of the oil pump is to replace the shaft seal of the oil pump. In the traditional process of replacing the oil seal, a suitable screw needs to be installed in the threads of the output shaft of the oil pump, and then one person needs to press the output shaft of the oil pump to prevent the output shaft of the oil pump from moving outward during the replacement of the oil seal, which causes the output shaft of the oil pump to drive the thrust bearing and the support bearing to move outward, resulting in the separation of the oil cylinder of the oil pump from the oil distribution disc. If this happens, the oil distribution disc and the oil cylinder need to be reinstalled in place after completely disassembling the oil pump, which increases the additional maintenance workload and the consumption of corresponding spare parts. If the output shaft of the oil pump drives the bearing to move, but the maintenance personnel do not find it, after the replacement of the output shaft oil seal is completed and the assembly is restarted, it may cause abnormal damage to the internal oil pump, which has high risk. SUMMARY

[0003] In view of the above problems, the utility model provides a frock for replacing oil seal in hydraulic oil pump, which can avoid axial movement of the main shaft of the oil pump during the replacement of the oil seal.

[0004] To achieve the above purpose, the following technical scheme is adopted: a frock for replacing oil seal in hydraulic oil pump, comprising a main support cross bar, a first screw rod, a top rod and a second screw rod,

[0005] The main support cross bar is used to be fixed on the end face of the motor mounting base, and at least one pair of installation through holes is opened at both ends of the main support cross bar, the installation through holes correspond to the fixed screw holes on the end face of the motor mounting base,

[0006] First screw holes and second screw holes are also opened on the main support cross bar,

[0007] The second screw rod is assembled on the main support cross bar through the second screw hole, which ensures that when the second screw rod is rotated, the transverse displacement generated by the second screw rod acts on the end face of the main bearing of the oil pump and fixes the main bearing of the oil pump,

[0008] The first screw rod is installed on the main support cross bar through the first screw hole, and the end of the top rod is screwed with the front end of the first screw rod to connect the two as a whole, which ensures that when the first screw rod is rotated, the transverse displacement generated by the top rod acts on the center of the end face of the main shaft of the oil pump and fixes the main shaft of the oil pump.

[0009] Further, the installation through hole and the fixed screw hole on the end face of the motor mounting base have the same hole diameter.

[0010] Furthermore, the diameter of the push rod is half the diameter of the oil pump main shaft.

[0011] Furthermore, the diameter of the second screw is half of the diameter of the top rod.

[0012] Furthermore, the hole distance between the first screw hole and the second screw hole is the difference between the radius of the oil pump main bearing and the diameter of the second screw.

[0013] Furthermore, the push rod is made of nylon.

[0014] Furthermore, the end surface of the second screw rod that contacts the end surface of the oil pump main bearing is in an arc shape, and the end surface of the push rod that contacts the end surface of the oil pump main shaft is in an arc shape.

[0015] Furthermore, a first plugging bolt is installed at one end of the first screw rod away from the push rod, and a second plugging bolt is installed at one end of the second screw rod away from the active end.

[0016] The beneficial effects of the utility model are as follows: the utility model always maintains pressure on the oil pump main shaft or the oil pump main bearing end during the process of replacing the oil seal, that is, in the early stage of removing the oil seal end cover, a push rod is used to support the oil pump main shaft, and in the later stage of removing the oil seal end cover and when replacing the oil seal, a second screw is used to support the oil pump main bearing, thereby preventing the oil pump main shaft from moving outward, thereby avoiding adverse consequences caused by the movement of the oil pump main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 The main view of the main supporting crossbar;

[0019] Figure 3 This is an application diagram of the utility model.

[0020] As shown in the figure: 1. Main support cross bar; 2. First screw; 3. Push rod; 4. Second screw; 5. Mounting through hole; 6. First plug bolt; 7. Second plug bolt; 200. First screw hole; 400. Second screw hole; 900. Mounting screw; 901. Motor mounting base; 902. Oil pump main shaft; 903. Oil seal end cover retaining spring; 904. Oil seal end cover; 905. Oil pump main bearing. DETAILED DESCRIPTION

[0021] Example 1

[0022] The following further describes the following with reference to the accompanying drawings. Figure 1 As shown, a tool for replacing the oil seal in a hydraulic oil pump is provided, comprising a main support cross bar 1, a first screw 2, a push rod 3 and a second screw 4.

[0023] likeFigure 2 And combined Figure 3 As shown, the main support crossbar 1 has at least a pair of mounting through holes 5 at both ends, the mounting through holes 5 correspond to the motor mounting base 901 fixing screw holes and the diameters of the two openings are the same, the mounting through holes 5 are used to cooperate with the mounting screws 900 to fix the main support crossbar 1 on the end face of the motor mounting base 901, in order to adapt to the application on more types of oil pumps, according to the size of the oil pump, a plurality of pairs of mounting through holes 5 are opened at both ends of the main support crossbar 1,

[0024] The main support crossbar 1 also has a first screw hole 200 and a second screw hole 400 for installing the first screw rod 2 and the second screw rod 4,

[0025] The second screw rod 4 is assembled on the main support crossbar 1 through the second screw hole 400, which ensures that when the second screw rod 4 is rotated, the transverse displacement generated by the second screw rod 4 acts on the end face of the oil pump main bearing 905 and fixes the oil pump main bearing 905; the first screw rod 2 is installed on the main support crossbar 1 through the first screw hole 200, the end of the top rod 3 is screwed with the front end of the first screw rod 2, connecting the two into one, which ensures that when the first screw rod 2 is rotated, the transverse displacement generated by the top rod 3 acts on the center of the end face of the oil pump main shaft 902 and fixes the oil pump main shaft 902,

[0026] In order to avoid scratching the oil pump main bearing 905 and the oil pump main shaft 902 by the second screw rod 4 and the top rod, the end face of the second screw rod 4 in contact with the end face of the oil pump main bearing 905 is arc-shaped, the end face of the top rod 3 in contact with the end face of the oil pump main shaft 902 is arc-shaped, and in addition, the top rod 3 is made of nylon material

[0027] The first screw rod 2 has a first plug bolt 6 installed at the end away from the top rod 3, and the second screw rod 4 has a second plug bolt 7 installed at the end away from the acting end.

[0028] In order to always have a force to press the oil pump main shaft 902 or the oil pump main bearing 905 when replacing the oil seal of the oil pump, specifically, in order to make the second screw rod 4 smoothly act on the end face of the oil pump main bearing 905 in transverse displacement when the oil seal end cover is disassembled, the diameter of the top rod 3 is designed to be one half of the diameter of the oil pump main shaft 902, the diameter of the second screw rod 4 is designed to be one half of the diameter of the top rod 3, and the hole distance between the first screw hole 200 and the second screw hole 400 is designed to be the difference between the radius of the oil pump main bearing 905 and the diameter of the second screw rod 4.

[0029] In use, as Figure 3 shown,

[0030] S1. Disconnect the motor wiring and remove the motor;

[0031] S2. Using the installation screw 900 to pass through the installation through hole 5 of the main support cross bar 1 and screw into the motor installation base 901 fixing screw hole, fix the main support cross bar 1 on the end face of the motor installation base 901;

[0032] S3. Rotate the first screw rod 2, make the top rod 3 act on the center of the end face of the oil pump main shaft 902 and press against the oil pump main shaft 902;

[0033] S4. Remove the oil seal end cover clamp spring 903, remove the oil seal end cover 904 along the top rod 3, and hang the shaft hole of the removed oil seal end cover 904 on the top rod 3, since the diameter of the top rod 3 is smaller than the diameter of the oil pump main shaft 902, when the oil seal end cover 904 is hung on the top rod 3, a height difference space is generated;

[0034] S5. Rotate the second screw rod 4, make the second screw rod 4 move in the transverse direction, since the height difference generated in S4, the second screw rod 4 is not blocked by the oil seal end cover 904 when moving in the transverse direction, can smoothly act on the end face of the oil pump main bearing 905 and press against the oil pump main bearing 905, at this time the second screw rod 4 is pressed on the outer ring of the end face of the oil pump main bearing 905;

[0035] S6. Unscrew the first screw rod 2, take out the oil seal end cover 904;

[0036] S7. After replacing the oil seal of the oil pump, according to the above-mentioned opposite order of disassembly, the oil seal end cover is installed.

[0037] The utility model is not limited to the embodiment, any equivalent concept or change in the technical range disclosed by the utility model is listed as the protection range of the utility model.

Claims

1. A tool for replacing an oil seal in a hydraulic oil pump, characterized in that, It comprises a main support crossbar (1), a first screw rod (2), a top rod (3) and a second screw rod (4), The main support crossbar (1) is used for being fixed on the end surface of the motor mounting base (901), and at least one pair of mounting through holes (5) are formed at the two ends of the main support crossbar (1), the mounting through holes (5) correspond to the fixing screw holes on the end surface of the motor mounting base (901), and first screw holes (200) and second screw holes (400) are further formed on the main support crossbar (1), The second screw rod (4) is assembled on the main support crossbar (1) through the second screw holes (400), so that when the second screw rod (4) is rotated, the transverse displacement generated by the second screw rod (4) acts on the end surface of the oil pump main bearing (905) and fixes the oil pump main bearing (905), The first screw rod (2) is installed on the main support crossbar (1) through the first screw holes (200), the end of the top rod (3) is screwed with the front end of the first screw rod (2), so that the two are connected into one body, and when the first screw rod (2) is rotated, the transverse displacement generated by the top rod (3) acts on the center of the end surface of the oil pump main shaft (902) and fixes the oil pump main shaft (902).

2. The tooling for replacing an oil seal in a hydraulic oil pump of claim 1, wherein, The mounting through holes (5) have the same hole diameter as the fixing screw holes on the end surface of the motor mounting base (901).

3. The tooling for replacing an oil seal in a hydraulic oil pump of claim 2, wherein, The diameter of the top rod (3) is half of the diameter of the oil pump main shaft (902).

4. The tooling for replacing an oil seal in a hydraulic oil pump of claim 3, wherein, The diameter of the second screw rod (4) is half of the diameter of the top rod (3).

5. The tooling for replacing an oil seal in a hydraulic oil pump of claim 4, wherein, The hole distance between the first screw holes (200) and the second screw holes (400) is the difference between the radius of the oil pump main bearing (905) and the diameter of the second screw rod (4).

6. The tooling for replacing an oil seal in a hydraulic oil pump according to any one of claims 1-5, characterized in that, The top rod (3) is made of nylon.

7. The tooling for replacing an oil seal in a hydraulic oil pump of claim 6, wherein, The end surface of the second screw rod (4) in contact with the end surface of the oil pump main bearing (905) is arc-shaped, and the end surface of the top rod (3) in contact with the end surface of the oil pump main shaft (902) is arc-shaped.

8. The tooling for replacing an oil seal in a hydraulic oil pump of claim 7, wherein, The first screw rod (2) is provided with a first plug bolt (7) at the end away from the top rod (3), and the second screw rod (4) is provided with a second plug bolt (8) at the end away from the acting end.

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