An oil pump intermediate gear installation and removal tool and use method

Abstract

The present invention relates to the technical field of locomotive and marine diesel engines, and specifically discloses an oil pump intermediate gear installation and removal tool and a method for using the oil pump intermediate gear installation and removal tool, the oil pump intermediate gear installation and removal tool comprising a support member detachably mounted on the outside of an oil pan, a guide rod slidably matched with the support member and having a hollow shaft sleeved on the outside, and a fixed pressure block detachably sleeved on the outside of the guide rod and matched with the guide rod for fixing the hollow shaft. Compared with the prior art, the present invention does not need to remove the shock absorber during installation and removal, and will not cause damage to the intermediate gear, and is convenient and efficient to install.

Description

Technical Field

[0001] The invention relates to the technical field of locomotive and marine diesel engines, and more particularly to an installation and removal tool for an intermediate gear of an oil pump and a use method thereof. Background Art

[0002] The installation structure of the intermediate gear of the diesel engine oil pump is complicated due to space issues. The external teeth of the intermediate gear mesh with the idler gear of the transmission mechanism. The internal spline in the middle of the gear cooperates with the external spline of the hollow shaft. The hollow shaft serves as a support shaft. The internal spline of the hollow shaft cooperates with the external spline of the oil pump input shaft to finally transmit the crankshaft power to the oil pump, thereby driving the oil pump to operate.

[0003] When replacing the intermediate gear of the oil pump on a locomotive or on a ship, due to the limited space and the complex installation structure of the intermediate gear, the diesel engine free end shock absorber needs to be removed and taken out by manual knocking when the intermediate gear is disassembled and installed. Since the shock absorber weighs about 500kg, a crane needs to be installed when disassembling and installing the shock absorber on a locomotive or on a ship, and then the shock absorber needs to be lifted out by the crane, which consumes a lot of man-hours and there are installation risks in the shock absorber lifting operation. At the same time, manual knocking is easy to damage the gear bearing and the hollow shaft of the gear. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an oil pump intermediate gear installation and removal tool and a use method. Compared with the prior art, it is not necessary to remove the shock absorber during installation and removal, and the intermediate gear will not be damaged, so the installation is convenient and efficient.

[0005] The solution adopted by the present invention to solve the technical problem is:

[0006] The utility model discloses an oil pump intermediate gear installation and disassembly tool, comprising a support member detachably mounted on the outside of an oil pan, a guide rod slidingly matched with the support member and having a hollow shaft sleeved on the outside, and a fixed pressure block detachably sleeved on the outside of the guide rod and matched with the guide rod for fixing the hollow shaft.

[0007] The guide rod is used to fix the hollow shaft. When the guide rod moves along its axis toward the oil pan, the hollow shaft will enter the gear inner hole of the intermediate gear. At the same time, when the guide rod passes through the gear inner hole, the sleeve of the intermediate gear is sleeved on the outside of the guide rod. The guide rod continues to move, so that the sleeve is sleeved on the outside of the hollow shaft. Subsequently, the bearing is sleeved on the outside of the guide rod. The guide rod continues to move, so that the bearing is installed in the bearing inner hole. The installation of the hollow shaft, sleeve and bearing is completed. The entire installation and removal process does not require the removal of the shock absorber or knocking. The installation and removal of the hollow shaft, sleeve and bearing can be achieved by moving the guide rod along its axial direction. The entire installation and removal process is simple and efficient.

[0008] In some possible embodiments, the guide rod includes a support rod with one end passing through the support member and used to fit the hollow shaft, and a guide portion arranged at the other end of the support rod; the fixed pressure block is fitted on the outside of the support rod and is located on the side of the hollow shaft away from the guide portion; the fixed pressure block is threadedly engaged with the support rod.

[0009] In some possible implementations, the support rod is a screw rod, and a square head is provided at one end of the screw rod away from the guide block; a nut threadedly engaged with the screw rod is sleeved on one side of the screw rod close to the square head.

[0010] In some possible implementations, the guide portion includes a cylindrical connecting section coaxially connected to the screw, and a frustoconical guiding section coaxially connected to one end of the connecting section away from the screw; the guiding section is fitted with a sleeve and a bearing in the intermediate gear with a small clearance.

[0011] In some possible implementations, a positioning boss is provided at one end of the fixed pressure block close to the hollow shaft and one end of the connecting section close to the hollow shaft, respectively. The positioning boss is inserted into a gap formed by the hollow shaft and the screw.

[0012] In some possible implementations, the positioning boss is in a circular ring shape.

[0013] In some possible embodiments, the support member includes a support body which is cylindrical and connected to the oil pan, and an end cover which is arranged on the side of the support body away from the oil pan and connected to the support body; a through hole through which the screw passes and which is coaxial with the support body is provided on the end cover; and the fixed pressure block is located in the support body.

[0014] In some possible implementations, a plurality of cavities communicating with the interior of the support body are disposed on the support body.

[0015] In some possible implementations, an ear seat connected to the oil pan is provided on the support body.

[0016] A method for using the above-mentioned oil pump intermediate gear installation and removal tool comprises the following steps:

[0017] When installing the intermediate gear, put the hollow shaft on the outside of the screw and fix it;

[0018] Fixing the support body to the outer side of the oil pan;

[0019] The control screw moves along its axial direction toward one side of the oil pan and passes through the gear inner hole of the intermediate gear;

[0020] The insert sleeve of the intermediate gear is sleeved on the outside of the guide block, and the screw is continuously controlled to move along its axial direction toward one side of the oil pan so that the insert sleeve is sleeved on the outside of the hollow shaft;

[0021] Continue to control the screw to move along its axial direction toward one side of the oil pan, and sleeve the bearing of the intermediate gear on the outside of the guide block until the bearing is installed in the inner hole of the bearing; complete the installation;

[0022] On the contrary, the removal can be achieved by controlling the screw to move along its axial direction away from one side of the oil pan.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention controls the movement of the screw rod in the axial direction, thereby enabling the hollow shaft sleeved on the outer side of the screw rod and fixed by the fixed pressure block and the guide block to move, thereby realizing the installation and removal of the hollow shaft, the insert sleeve and the bearing; the entire installation and removal process does not require the removal of the shock absorber or knocking, and the installation and removal of the hollow shaft, the insert sleeve and the bearing can be realized by moving the guide rod along its axial direction, and the entire installation and removal process is simple and efficient;

[0025] By setting the positioning boss, the screw rod and the hollow shaft are coaxially arranged, and the shaking of the hollow shaft is avoided so that the hollow shaft can be smoothly installed on the spline shaft;

[0026] Through the setting of the guide block, the sleeve and the bearing can still be effectively supported after being separated from the hollow shaft, so as to prevent the sleeve and the bearing from falling into the square oil groove of the oil pan;

[0027] The invention realizes installation and disassembly of the hollow shaft, the insert sleeve and the bearing by converting the torque force into the action force for the screw to move along its axial direction through the cooperation between the nut and the screw; the installation and disassembly is convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a structural schematic diagram when the present invention is used for installation;

[0030] Figure 3 It is a schematic diagram of the structure when the present invention is used for disassembly;

[0031] Figure 4 For the present invention Figure 2 The enlarged view of point A in the middle;

[0032] Figure 5 A schematic diagram of the three-dimensional structure of the present invention, the hollow shaft, the insert sleeve, the bearing, and the oil pan when the present invention is used for disassembly;

[0033] Figure 6 for Figure 5 A cross-sectional view of

[0034] Among them: 1. support member; 11. support body; 12. end cover; 2. guide rod; 21. support rod 21; 22. guide part; 221. connecting section; 222. guide section; 23. square head; 3. fixed pressure block; 4. nut; 5. positioning boss; 10. oil pan; 20. hollow shaft; 30. sleeve; 40. bearing. DETAILED DESCRIPTION

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate a quantity restriction, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The present invention is described in detail below.

[0037] like Figure 1-Figure 6 As shown:

[0038] A tool for installing and removing an intermediate gear of an oil pump includes a support member 1 that can be detachably mounted on the outside of an oil pan 10, a guide rod 2 that is slidably matched with the support member 1 and has a hollow shaft 20 sleeved on the outside, and a fixed pressure block 3 that can be detachably sleeved on the outside of the guide rod 2 and cooperates with the guide rod 2 to fix the hollow shaft 20.

[0039] The guide rod 2 is used to fix the hollow shaft 20. When the guide rod 2 moves along its axis into the oil pan 10, the hollow shaft 20 will enter the gear inner hole of the intermediate gear. At the same time, when the guide rod 2 passes through the gear inner hole, the sleeve 30 of the intermediate gear is sleeved on the outside of the guide rod 2. The guide rod 2 continues to move, so that the sleeve 30 is sleeved on the outside of the hollow shaft 20; then the bearing 40 is sleeved on the outside of the guide rod 2, and the guide rod 2 continues to move, so that the bearing 40 is installed in the inner hole of the bearing 40; the installation of the hollow shaft 20, the sleeve 30, and the bearing 40 is completed; the entire installation and removal process does not require the shock absorber to be removed or knocked, and the installation and removal of the hollow shaft 20, the sleeve 30, and the bearing 40 can be achieved by moving the guide rod 2 along its axial direction. The entire installation and removal process is simple and efficient.

[0040] In some possible embodiments, in order to effectively realize that the guide rod 2 can drive the hollow shaft 20 to move; the guide rod 2 includes a support rod 21 with one end passing through the support member 1 and used to fit the hollow shaft 20, and a guide portion 22 arranged at the other end of the support rod 21; the fixed pressure block 3 is fitted on the outside of the support rod 21 and is located on the side of the hollow shaft 20 away from the guide portion 22; the fixed pressure block 3 is threadedly matched with the support rod 21.

[0041] The fixed pressure block 3 is sleeved on the outside of the support rod 21 and is screwed with the support rod 21. It can move along the axial direction of the screw rod and cooperate with the guide part 22 to clamp and fix the hollow shaft 20 sleeved on the outside of the support rod 21 so that it will not shake, and is coaxially arranged with the inner hole of the gear and installed in the inner hole of the gear.

[0042] In some possible embodiments, the support rod 21 is a screw, and a square head 23 is provided at one end of the screw away from the guide block; a nut 4 threadedly engaged with the screw is mounted on the side of the screw close to the square head 23; the square head 23 cooperates with other devices, and during installation and disassembly, the square head 23 will be clamped to prevent the screw from rotating when the nut 4 is rotated and twisted, thereby affecting the transmission of the torque, so that the screw can only move along its axial direction, driving the hollow shaft 20 to move along the axial direction of the screw; for example, during installation, the nut 4 is controlled to move counterclockwise to drive the screw to move toward the side close to the oil pan 10, thereby causing the hollow shaft 20 to move toward the inner hole of the gear; conversely, during disassembly, the nut 4 will be controlled to move clockwise.

[0043] In some possible implementations, the guide portion 22 includes a connecting section 221 that is cylindrical and coaxially connected to the screw, and a frustum-shaped guiding section 222 that is coaxially connected to one end of the connecting section 221 away from the screw; the guiding section 222 is fitted with the insert 30 and the bearing 40 in the intermediate gear with a small clearance, and the outer diameter of the large end of the guiding section 222 is consistent with the outer diameter of the connecting section 221 and is connected to each other;

[0044] Furthermore, the small gap is 0.1 mm to 0.2 mm, and the setting of the guide section 222 guides the insert sleeve 30 and the bearing 40 so that they can be coaxial with the hollow shaft 20;

[0045] During installation, when the guide section 222 passes through the inner hole of the gear, the sleeve 30 on the side of the intermediate gear away from the support member 1 will be installed, and the sleeve 30 will be sleeved on the guide section 222. As the screw and the hollow shaft 20 continue to move, the sleeve 30 will be gradually guided and installed on the hollow shaft 20. Then, the screw is continuously controlled to move, and the bearing 40 is sleeved on the guide section 222. The screw is controlled to move again, and the guide section 222 will enter the inner hole of the bearing 40, so that the bearing 40 will be gradually guided and installed on the hollow shaft 20. The installation of the sleeve 30 and the bearing 40 on the side of the intermediate gear away from the support member 1 is completed.

[0046] The present invention is dismantled, and then the insert sleeve 30 and the bearing 40 on the other side of the intermediate gear are installed to complete the installation of the intermediate gear.

[0047] In some possible implementations, in order to effectively position and clamp the hollow shaft 20 and make the hollow shaft 20 coaxially arranged with the screw rod, a positioning boss 5 is respectively provided at one end of the fixed pressure block 3 close to the hollow shaft 20 and one end of the connecting section 221 close to the hollow shaft 20, and the positioning boss 5 is inserted into the gap formed by the hollow shaft 20 and the screw rod.

[0048] When installing the hollow shaft 20, the positioning boss 5 on the connecting section 221 will be inserted into the gap formed between the hollow shaft 20 and the screw rod, and then the fixed pressure block 3 is twisted to make the fixed pressure block 3 move toward the side close to the hollow shaft 20, and the positioning boss 5 on the fixed pressure block 3 is inserted into the hollow shaft 20 and the screw rod, so that the hollow shaft 20 and the screw rod are coaxial, and the fixed pressure block 3 is continued to be twisted so that the fixed pressure block 3 and the connecting section 221 are close to each other and contact the two end faces of the hollow shaft 20 respectively, so as to fix the hollow shaft 20 and avoid shaking.

[0049] In some possible implementations, the positioning boss 5 is in a circular ring shape, which is easy to process and fills the gap between the hollow shaft 20 and the screw to ensure the coaxiality of the two.

[0050] In some possible embodiments, the support member 1 includes a support body 11 which is cylindrical and connected to the oil pan 10, and an end cover 12 which is arranged on a side of the support body 11 away from the oil pan 10 and connected to the support body 11; a through hole through which a screw passes and which is coaxial with the support body 11 is arranged on the end cover 12; the fixed pressure block 3 is located in the support body 11;

[0051] Further, the support body 11 is cylindrical;

[0052] During installation, the nut 4 is located in the support body 11 and is in contact with the end cover 12;

[0053] During disassembly, the nut 4 is located on the side of the end cover 12 away from the oil pan 10 and is in abutment with the end cover 12;

[0054] During installation, the side of the end cover 12 away from the oil pan 10 will serve as a limiting surface. After the nut 4 contacts with the end cover 12, it will continue to rotate counterclockwise, so that the screw will move along its axis toward the inside of the oil pan 10, so that the hollow shaft 20 will move toward the side of the intermediate gear and enter the inner hole of the gear.

[0055] On the contrary, during disassembly, the side of the end cover 12 close to the oil pan 10 will serve as a limiting surface. After the nut 4 comes into contact with it, it continues to rotate clockwise, so that the screw will move along its axis toward the side away from the oil pan 10, thereby driving the hollow shaft 20 to move toward the side of the support body 11 to achieve disassembly.

[0056] In some possible implementations, in order to effectively achieve weight reduction and make it easier to screw the nut 4 during disassembly, a plurality of cavities connected to the interior of the support body 11 are provided on the support body 11. The provision of the cavities also facilitates observation of the installation and disassembly status of the hollow shaft 20.

[0057] In some possible implementations, in order to effectively achieve the connection between the support body 11 and the oil pan 10 , an ear seat connected to the oil pan 10 is provided on the support body 11 .

[0058] When the support body 11 is installed, its axis will be coaxially arranged with the mounting hole on the oil pan 10 which is coaxial with the inner hole of the gear; the screw rod and the support body 11 are coaxially arranged, so that the hollow shaft 20 sleeved on the outer side of the screw rod is coaxially arranged with the inner hole of the gear;

[0059] A method for using the above-mentioned oil pump intermediate gear installation and removal tool comprises the following steps:

[0060] When installing the intermediate gear, the hollow shaft 20 is placed on the outside of the screw and fixed;

[0061] The cylindrical support body 11 is fixed to the outside of the oil pan 10, and the support body 11 is coaxially arranged with the inner hole of the gear. The nut 4 is sleeved on the outside of the screw and located inside the support body 11, and the square head 23 is clamped by a clamping device. The nut 4 is controlled by a wrench to rotate counterclockwise around the axial direction of the screw, so that the screw moves along its axial direction toward one side of the oil pan 10 and passes through the inner hole of the gear of the intermediate gear.

[0062] The insert sleeve 30 on the side of the intermediate gear away from the support body 11 is mounted on the outer side of the guide section 222, and the screw is continuously controlled to move along its axial direction toward the side of the oil pan 10, so that the insert sleeve 30 is mounted on the outer side of the hollow shaft 20;

[0063] Continue to control the screw to move along its axial direction toward one side of the oil pan 10, and sleeve the bearing 40 on the side of the intermediate gear away from the support body 11 onto the outer side of the guide section 222 until the bearing 40 is installed in the inner hole of the bearing 40; complete the installation;

[0064] On the contrary, the removal can be achieved by controlling the screw rod to move away from the oil pan 10 along its axial direction.

[0065] Specifically, during disassembly, the guide rod 2 is passed through the hollow shaft 20, and the fixed pressure block 3 is used to abut against the end of the hollow shaft 20 away from the guide section 222 to achieve fixed clamping of the hollow shaft 20; the support block is installed on the oil pan 10 so that the square head 23 will pass through the through hole, and then the nut 4 is installed, and the nut 4 will be located on the side of the end cover 12 away from the oil pan 10; the square head 23 is clamped by the clamping device, so that when the nut 4 moves clockwise, the screw can only move along its axis to the side close to the support body 11 without rotating;

[0066] The present invention adopts the method of tightening torque of nut 4 to move the hollow shaft 20; the guide section 222 cooperates with the fixed pressure block 3 to realize the positioning of the hollow shaft 20, and when the screw moves, it is convenient for the hollow shaft 20 to be horizontally moved out at the same position; the setting of the guide section 222 can also realize that when the hollow shaft 20 is removed, the sleeve 30 can be supported by the guide section 222 and will not fall into the oil tank of the oil pan 10.

[0067] The present invention can realize the removal and installation of the hollow shaft 20 of the intermediate gear, and at the same time serve as a guide for the installation of the insert sleeve 30 and the bearing 40, without the need for manual observation and installation, and without the need for disassembly and assembly of the shock absorber; finally, the disassembly and assembly of the intermediate gear is completed.

[0068] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. An oil pump intermediate gear installation and removal tool, characterized in that: It comprises a support piece which is detachably mounted on the outside of the oil pan, a guide rod which is slidably matched with the support piece and has a hollow shaft sleeved on the outside, and a fixed pressing block which is detachably sleeved on the outside of the guide rod and matched with the guide rod for fixing the hollow shaft.

2. The oil pump intermediate gear installation and removal tool according to claim 1, characterized in that: The guide rod includes a support rod with one end passing through the support member and used to fit the hollow shaft, and a guide portion arranged at the other end of the support rod; the fixed pressure block is fitted on the outside of the support rod and is located on the side of the hollow shaft away from the guide portion; the fixed pressure block is threadedly engaged with the support rod.

3. The oil pump intermediate gear installation and removal tool according to claim 2, characterized in that: The support rod is a screw rod, and a square head is arranged at one end of the screw rod away from the guide block; a nut threadedly matched with the screw rod is sleeved on one side of the screw rod close to the square head.

4. The oil pump intermediate gear installation and removal tool according to claim 2, characterized in that: The guide part comprises a cylindrical connecting section coaxially connected to the screw rod, and a frustum-shaped guiding section coaxially connected to one end of the connecting section away from the screw rod; the guiding section is matched with the insert sleeve and the bearing in the intermediate gear with a small clearance.

5. The oil pump intermediate gear installation and removal tool according to claim 2, characterized in that: Positioning bosses are respectively arranged at one end of the fixed pressure block close to the hollow shaft and one end of the connecting section close to the hollow shaft, and the positioning bosses are inserted into the gap formed by the hollow shaft and the screw rod.

6. The oil pump intermediate gear installation and removal tool according to claim 5, characterized in that: The positioning boss is in a circular ring shape.

7. The oil pump intermediate gear installation and removal tool according to claim 2, characterized in that: The support member comprises a support body which is cylindrical and connected to the oil pan, and an end cover which is arranged on the side of the support body away from the oil pan and connected to the support body; a through hole which a screw rod passes through and is coaxial with the support body is arranged on the end cover; the fixed pressure block is located in the support body; During installation, the nut is located in the support body and is in abutment contact with the end cover; During disassembly, the nut is located on a side of the end cover away from the oil pan and is in abutment contact with the end cover.

8. The oil pump intermediate gear installation and removal tool according to claim 7, characterized in that: The support body is provided with a plurality of cavities which are communicated with the interior of the support body.

9. The oil pump intermediate gear installation and removal tool according to claim 7, characterized in that: An ear seat connected to the oil pan is arranged on the support body.

10. A method for using the oil pump intermediate gear installation and removal tool according to any one of claims 1 to 9, characterized in that: The specific steps include: When installing the intermediate gear, put the hollow shaft on the outside of the screw and fix it; Fixing the support body to the outer side of the oil pan; The control screw moves along its axial direction toward one side of the oil pan and passes through the gear inner hole of the intermediate gear; The insert sleeve of the intermediate gear is sleeved on the outside of the guide block, and the screw is continuously controlled to move along its axial direction toward one side of the oil pan so that the insert sleeve is sleeved on the outside of the hollow shaft; Continue to control the screw to move along its axial direction toward one side of the oil pan, and sleeve the bearing of the intermediate gear on the outside of the guide block until the bearing is installed in the inner hole of the bearing; complete the installation; On the contrary, the removal can be achieved by controlling the screw to move along its axial direction away from one side of the oil pan.

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