Assembly method of coolant pump and gearbox

Abstract

This invention relates to the field of component assembly technology, specifically to a method for assembling a coolant pump and a gearbox. The assembly method uses an auxiliary tool, which includes a shaft with a boss at one end. A first limiting structure and a second limiting structure are provided on the outer circumference of the boss and the shaft, respectively. The assembly method is performed according to the following steps: S1, inserting the boss of the auxiliary tool into the coolant pump, thus securing the coolant pump to the tool; S2, holding the tool horizontally, inserting one end of the coolant pump bolt into the gearbox mounting hole, adjusting the tool to align the bolt with the screw hole in the gearbox; S3, after the bolt and screw hole are aligned, the second limiting structure confines the tool within the mounting hole, and a tightening gun is used to tighten the bolt from the coolant pump nut side, completing the assembly of the coolant pump and gearbox. This invention uses an auxiliary tool to tighten the coolant pump, facilitating the tightening of the coolant pump bolts with a tightening gun, preventing the coolant pump from shaking or rotating.

Description

Technical Field

[0001] This invention relates to the field of component assembly technology, specifically to a method for assembling a cooling pump and a gearbox. Background Technology

[0002] The transmission is one of the core components of all types of automobiles, used to expand the range of torque and speed variation of the drive wheels to achieve good power and fuel economy. Electric vehicles (including pure electric vehicles and hybrid electric vehicles) use electric motor-driven transmissions (hereinafter referred to as electric drive transmissions). During operation, the bearings in the transmission system generate a large amount of heat due to friction between components. If this heat is not balanced in time, the bearings will overheat, affecting their performance and potentially causing failure, ultimately preventing the vehicle from operating normally. Therefore, oil injection cooling is necessary to ensure the normal operation of the electric drive transmission. Currently, this is generally achieved by installing a cooling pump on the fuel injection pipes to provide cooling flow.

[0003] like Figures 1-2 As shown, the coolant pump 11 includes an annular body with an annular lug plate on its outer side. Four bolts 12 are arranged axially on the lug plate. The gearbox 21 has mounting holes 22 corresponding to the coolant pump. Mounting plates corresponding to the lug plates are installed within the mounting holes 22, and threaded holes 23 corresponding to the bolts 12 are provided on the mounting plates. During installation, the worker typically holds the coolant pump 11 in one hand, holding the annular body horizontally. The ends of the bolts 12 face the corresponding threaded holes 23 on the gearbox 21. The worker inserts the annular body horizontally into the mounting hole 22, aligning the bolts 12 with the threaded holes 23. Then, using a tightening gun, the worker tightens the bolts 12 on the lug plate until all bolts 12 are tightened to the threaded holes 23, completing the assembly of the coolant pump 11 and the gearbox 21.

[0004] During assembly, because the coolant pump is assembled from the side, workers hold the pump sideways to align the bolts with the threaded holes. This process is difficult for workers to maintain, and during tightening, workers need to push the pump firmly to prevent it from coming loose before it is fully tightened. The current assembly method suffers from low efficiency and difficulty in holding and positioning the pump. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a method for assembling a cooling pump and a gearbox.

[0006] The technical solution of the present invention is: a method for assembling a cooling pump and a gearbox, the assembly method using an auxiliary tool; the auxiliary tool includes a shaft; one end of the shaft is provided with a boss that protrudes axially; a first limiting structure for restricting the cooling pump is provided on the outer circumference of the boss; a second limiting structure for restricting the shaft within the gearbox mounting hole is provided on the outer circumference of the shaft.

[0007] The assembly method is performed according to the following steps:

[0008] S1. Insert the boss of the auxiliary tool into the coolant pump, and restrict the coolant pump to the auxiliary tool through the first limiting structure;

[0009] S2. Hold the auxiliary tool and insert one end of the coolant pump bolt into the gearbox mounting hole in the horizontal direction. Adjust the auxiliary tool so that the bolt corresponds one-to-one with the screw holes in the gearbox.

[0010] S3. After aligning the bolts with the screw holes, the second limiting structure will limit the auxiliary tool to the mounting hole. Tighten the bolts from the side of the coolant pump nut with the tightening gun. After all the bolts are tightened, the assembly of the coolant pump and the gearbox is completed.

[0011] According to the present invention, a method for assembling a cooling pump and a gearbox, in step S1, the method of restricting the cooling pump to the auxiliary device by means of a first limiting structure includes: a first O-ring is provided on the outer circumferential end face of the boss, the first O-ring being a rubber ring protruding from the circumferential side of the boss; after the boss is inserted into the inner cavity of the cooling pump, the first O-ring is pressed between the inner cavity of the cooling pump and the boss to restrict the cooling pump to the boss.

[0012] According to the assembly method of a coolant pump and a gearbox provided by the present invention, in step S2, the method of adjusting the auxiliary tool to make the bolts correspond one-to-one with the screw holes in the gearbox includes: a handle is provided on the other side of the shaft relative to the boss; after inserting the coolant pump into the mounting hole, the handle is rotated to make the coolant pump rotate around the axis in the mounting hole until the bolts correspond one-to-one with the screw holes.

[0013] According to the assembly method of a cooling pump and a gearbox provided by the present invention, in step S3, the method of the second limiting structure limiting the auxiliary fixture within the mounting hole includes: a second O-ring is provided on the outer circumferential end face of the shaft, the second O-ring being a rubber ring protruding from the circumferential side of the shaft; after the shaft is inserted into the mounting hole, the second O-ring is pressed between the inner side of the mounting hole and the outer side of the shaft to limit the shaft within the mounting hole.

[0014] According to the assembly method of a coolant pump and a gearbox provided by the present invention, in step S3, the method of tightening the bolts from the nut side of the coolant pump with a tightening gun includes: the shaft body is provided with through holes corresponding to the bolts one by one, the through holes penetrate the shaft body axially, and after the bolts and bolt holes are in one-to-one correspondence, the tightening gun is inserted from one end of the through hole to tighten the nut of the bolt.

[0015] According to the assembly method of a cooling pump and a gearbox provided by the present invention, in step S3, after the first bolt is tightened by the tightening gun, the shaft is pulled out axially, and then the remaining bolts are tightened one by one to complete the assembly of the cooling pump and the gearbox.

[0016] According to a method for assembling a cooling pump and a gearbox provided by the present invention, in step S2, the method of inserting one end of the cooling pump bolt into the gearbox mounting hole in the horizontal direction using a gripping aid includes: a limiting plate is provided at the end of the shaft away from the boss; the limiting plate is an annular structure protruding from the shaft.

[0017] Hold the auxiliary tool and insert one end of the coolant pump bolt into the gearbox mounting hole in a horizontal direction until the limit plate abuts against the gearbox.

[0018] According to the assembly method of a cooling pump and a gearbox provided by the present invention, an annular first groove is provided on the outer circumferential end face of the boss, and a first O-ring is engaged in the first groove.

[0019] According to the assembly method of a cooling pump and a gearbox provided by the present invention, an annular second groove is provided on the outer circumferential end face of the shaft, and a second O-ring is engaged in the second groove.

[0020] According to the assembly method of a cooling pump and a gearbox provided by the present invention, the first O-ring protrudes 1mm to 3mm beyond the outer circumference of the boss.

[0021] The advantages of this invention are: 1. By using an auxiliary tool to clamp the cooling pump from the inside, the cooling pump can be stably supported between the auxiliary tool and the gearbox during the assembly process of the cooling pump to the gearbox. The auxiliary tool can effectively position the bolts on the cooling pump into the screw holes of the gearbox. The auxiliary tool makes it very convenient to tighten the cooling pump, which greatly facilitates the assembly process of the cooling pump and the gearbox and improves the assembly efficiency.

[0022] 2. The present invention uses a first O-ring to restrict the connection between the cooling pump and the auxiliary device. The connection method is extremely simple. The first O-ring is a rubber ring. When it is pressed between the cooling pump and the auxiliary device, the cooling pump can be restricted to the auxiliary device by increasing the friction. This makes it convenient to operate the cooling pump using the auxiliary device. The structure is simple and easy to use.

[0023] 3. This invention makes it extremely convenient to position and adjust the coolant pump bolts and gearbox screw holes. By rotating the handle on one side of the shaft, the coolant pump can be easily rotated and adjusted, thereby adjusting the bolts around the axis and facilitating alignment between the bolts and screw holes.

[0024] 4. The present invention uses a second O-ring to limit the inner cavity of the mounting hole of the shaft and the gearbox. During the assembly of the coolant pump, the second O-ring can stably restrict the shaft to the inner cavity of the mounting hole, avoiding the problem of falling off or rotating during the tightening of bolts. The entire assembly process is extremely stable.

[0025] 5. This invention provides a method for tightening bolts by creating through holes on the shaft body. Once the bolts of the cooling pump are positioned with the bolt holes, a tightening gun can be inserted into the through holes to tighten the bolts. The entire tightening method is extremely simple and easy to operate.

[0026] 6. After the tightening gun tightens the first bolt, the entire cooling pump is positioned in the mounting hole. At this time, the entire auxiliary tool can be pulled out. Pulling out the auxiliary tool will not affect the tightening of subsequent bolts, and it provides more space for the tightening gun to operate.

[0027] 7. The auxiliary tool of the present invention is provided with a limiting plate on the side near the handle. After the bolts and screw holes of the cooling pump are aligned one by one, the limiting plate can restrict the auxiliary tool from further extending into the mounting hole. The limiting plate is positioned at the outer end of the mounting hole, making the positioning of the auxiliary tool and the mounting hole more stable. During the tightening process of the tightening gun, there will be no shaking or rotation problem, and the stability is better.

[0028] 8. The present invention provides an annular first groove on the outer circumferential end face of the boss. The first groove is used to install the first O-ring. This arrangement makes the installation of the first O-ring extremely convenient and subsequent replacement very easy. The first groove restricts the first O-ring so that it will not move axially during use.

[0029] 9. The present invention provides an annular second groove on the outer circumferential end face of the shaft body. The second groove is used to install the second O-ring. This arrangement makes the installation of the second O-ring extremely convenient and subsequent replacement very easy. The second groove restricts the second O-ring so that it will not move axially during use.

[0030] 10. The first O-ring of the present invention protrudes 1mm to 3mm from the circumferential surface of the boss. This protrusion height enables the cooling pump to be stably positioned on the boss, but does not restrict the removal of the auxiliary tool after the bolts of the cooling pump are tightened, thereby improving the efficiency of the entire assembly process.

[0031] The assembly method of the coolant pump and gearbox of the present invention is extremely convenient. By using an auxiliary tool to tighten the coolant pump, it is convenient to use a tightening gun to tighten the bolts of the coolant pump. The coolant pump will not shake or rotate, which greatly improves the assembly efficiency. Attached Figure Description

[0032] Figure 1 : A schematic diagram of the cooling pump of this invention;

[0033] Figure 2 : Schematic diagram of the gearbox mounting hole location structure of the present invention;

[0034] Figure 3 : Front view of the assistive device structure of the present invention;

[0035] Figure 4 : Schematic diagram of the first and second groove structures of the assistive device of the present invention;

[0036] Figure 5 : Schematic diagram of the position structure of the boss and through hole in this invention;

[0037] Wherein: 1—shaft body; 2—boss; 3—handle; 4—first O-ring; 5—second O-ring; 6—first groove; 7—second groove; 8—through hole; 9—limiting plate;

[0038] 11—Cooling pump; 12—Bolt;

[0039] 21—Gearbox; 22—Mounting hole; 23—Screw hole. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0044] This application relates to a method for installing a cool pump and a transmission. The assembly method involves fitting a cool pump 11 into a mounting hole 22 of a transmission 21. The cool pump 11 is inserted horizontally into the mounting hole 22, then the bolts 12 on the cool pump 11 are aligned with the threaded holes 23 within the mounting hole 22. A tightening gun is then inserted into the mounting hole 22 to tighten the bolts 12. The end of the cool pump 11 facing away from the threaded hole 23 has an annular cavity structure. A ring of ear plates is provided on the outer side of the cool pump 11, and four sets of bolts 12 are provided on the ear plates. The mounting hole 22 is a hollow cavity structure. A mounting plate is provided at the end of the mounting hole 22 corresponding to the bolts 12, and the mounting plate has threaded holes 23 corresponding to the bolts 12. Once the bolts 12 of the cool pump 11 are tightened into the threaded holes 23, the cool pump 11 can be installed onto the transmission 21.

[0045] This application uses an auxiliary tool during the assembly process of the coolant pump 11 and the gearbox 21. The structure of the auxiliary tool is as follows: Figures 3-5 As shown, the auxiliary tool includes a shaft 1, which is a cylindrical structure. One end of the shaft 1 has a cylindrical boss 2, and the other end has a handle 3. The boss 2 is concentrically arranged with the shaft 1 and is a cylindrical structure with a diameter smaller than that of the shaft 1. The diameter of the boss 2 depends on the diameter of the cavity of the coolant pump 11. The handle 3 is a plate-like structure that protrudes outward along the axial direction on the shaft 1, designed for easy gripping by assemblers.

[0046] A first limiting structure is provided on the circumferential end face of the boss 2. This first limiting structure is used to limit the connection between the boss 2 and the cavity of the coolant pump 11 after the boss 2 is inserted into the cavity, preventing the coolant pump 11 from detaching from the boss 2. Specifically, this application proposes a first limiting structure, such as... Figure 3 As shown, the first limiting structure includes a first O-ring 4. The first O-ring 4 is a rubber ring fitted on the outer end face of the circumference of the boss 2. The first O-ring 4 protrudes radially from the outer end face of the circumference of the boss 2. When the boss 2 is inserted into the inner cavity of the coolant pump 11, the first O-ring 4 is pressed between the boss 2 and the inner cavity. The first O-ring 4 can increase the axial friction between the coolant pump 11 and the boss 2, so that the boss 2 and the coolant pump 11 can be stably connected together.

[0047] In a more specific embodiment, this application provides an annular first groove 6 on the boss 2. A first O-ring 4 engages within the first groove 6. The first groove 6 restricts the axial movement of the first O-ring 4, preventing axial movement of the first O-ring 4 during insertion of the boss 2 into the inner cavity of the coolant pump 11, thus ensuring the first O-ring 4 remains stably positioned on the boss 2. The first groove 6 is typically positioned at the axial midpoint of the boss 2, allowing the first O-ring 4 at this location to stably position the coolant pump 11 on the boss 2.

[0048] In other embodiments, the first O-ring 4 of this application protrudes 1mm to 3mm beyond the outer circumference of the boss 2. This protrusion height enables the coolant pump 11 to be stably positioned on the boss 2, but does not restrict the removal of the auxiliary tool after the bolts 12 of the coolant pump 11 are tightened, thereby improving the efficiency of the entire assembly process.

[0049] In some other embodiments, this application also provides a second O-ring 5 on the shaft 1. The second O-ring 5 has the same structure as the first O-ring 4. The second O-ring 5 is a rubber ring fitted on the shaft 1. The second O-ring 5 protrudes from the outer circumference of the shaft 1. When the shaft 1 is inserted into the mounting hole 22, the second O-ring 5 on the shaft 1 is pressed between the wall of the mounting hole 22 and the outer circle of the shaft 1. The second O-ring 5 can increase the friction between the shaft 1 and the mounting hole 22, so that the shaft 1 can be stably positioned in the mounting hole 22, and prevent the shaft 1 from shaking in the mounting hole during the tightening of the bolt 12.

[0050] In a more specific embodiment, this application provides a second groove 7 on the shaft 1. The second groove 7 is an annular groove, and the second O-ring 5 engages within the second groove 7. The second groove 7 restricts the axial movement of the second O-ring 5, thus positioning the second O-ring 5 in a fixed position on the shaft 1. The second groove 7 not only restricts the axial movement of the second O-ring 5 but also facilitates subsequent replacement of the second O-ring 5.

[0051] In another embodiment, the second O-ring 5 of this application protrudes 1mm to 3mm from the outer side of the circumference of the shaft 1. This protrusion height enables the shaft 1 to be stably positioned in the mounting hole 22, but does not restrict the removal of the auxiliary tool after the bolt 12 of the cooling pump 11 is tightened, thereby improving the efficiency of the entire assembly process.

[0052] In some alternative solutions, this application provides through holes 8 on the shaft corresponding to bolts 12, such as... Figure 5 As shown, the through hole 8 extends through the shaft 1 along the axial direction. The through hole 8 is designed to facilitate the insertion of a tightening gun into the through hole 8 to tighten the bolts 12 on the cooling pump 11.

[0053] In some embodiments, this application provides a limiting plate 9 at the end of the shaft 1 away from the boss 2. The limiting plate 9 is an annular structure protruding from the shaft 1. After the shaft 1 is inserted into the mounting hole 22, the limiting plate 9 can abut against the outer end of the mounting hole 22, which is actually against the gearbox 21. This can be used in conjunction with the second O-ring 5 to further improve the stability of the positioning connection between the shaft 1 and the mounting hole 22.

[0054] The specific assembly method of this application is carried out according to the following steps:

[0055] S1. Insert the boss 2 of the auxiliary tool into the inner cavity of the coolant pump 11, and press the first O-ring 4 between the inner cavity of the coolant pump 11 and the boss 2, so that the coolant pump 11 is positioned and connected to the boss 2.

[0056] S2. Hold the auxiliary tool and insert one end of the coolant pump bolt 12 into the mounting hole 22 of the gearbox 21 in the horizontal direction. Rotate the auxiliary tool to make the coolant pump 11 rotate around the axis in the mounting hole 22 until the bolt 12 on the coolant pump 11 corresponds one-to-one with the screw hole 23 in the gearbox 21.

[0057] S3. After aligning bolt 12 with screw hole 23, continue forward into mounting hole 22 until limit plate 9 abuts against gearbox 21. Second O-ring 5 is pressed between mounting hole 22 and shaft 1, stably restricting shaft 1 within mounting hole 22. Insert the head of tightening gun into through hole 8 to tighten bolt 12. After the first bolt 12 is tightened, the auxiliary tool can be pulled out. Then, use tightening gun to tighten the remaining bolts 12 one by one to complete the assembly of coolant pump 11 and gearbox 21.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for assembling a cooling pump and a gearbox, characterized in that: The assembly method uses an auxiliary tool; the auxiliary tool includes a shaft; one end of the shaft is provided with a boss that protrudes axially; a first limiting structure for restricting the cooling pump is provided on the outer circumference of the boss; a second limiting structure for restricting the shaft within the gearbox mounting hole is provided on the outer circumference of the shaft. The assembly method is performed according to the following steps: S1. Insert the boss of the auxiliary tool into the coolant pump, and restrict the coolant pump to the auxiliary tool through the first limiting structure; S2. Hold the auxiliary tool and insert one end of the coolant pump bolt into the gearbox mounting hole in the horizontal direction. Adjust the auxiliary tool so that the bolt corresponds one-to-one with the screw holes in the gearbox. S3. After the bolts and screw holes are aligned, the second limiting structure will limit the auxiliary tool to the mounting hole. Tighten the bolts from the side of the coolant pump nut with the tightening gun. After all the bolts are tightened, the assembly of the coolant pump and the gearbox is completed. In step S2, the method of adjusting the auxiliary tool to make the bolts correspond one-to-one with the screw holes in the gearbox includes: the shaft body is provided with a handle on the other side of the boss; after inserting the coolant pump into the mounting hole, the handle is turned to make the coolant pump rotate around the axis in the mounting hole until the bolts correspond one-to-one with the screw holes.

2. The assembly method of a cooling pump and a gearbox as described in claim 1, characterized in that: In step S1, the method of restricting the cool pump to the auxiliary device by the first limiting structure includes: a first O-ring is provided on the outer circumferential end face of the boss, the first O-ring is a rubber ring protruding from the circumferential side of the boss; after the boss is inserted into the inner cavity of the cool pump, the first O-ring is squeezed between the inner cavity of the cool pump and the boss to restrict the cool pump to the boss.

3. The assembly method of a cooling pump and a gearbox as described in claim 1, characterized in that: In step S3, the method of the second limiting structure to limit the auxiliary tool in the mounting hole includes: a second O-ring is provided on the outer circumferential end face of the shaft, the second O-ring is a rubber ring protruding from the circumferential side of the shaft; after the shaft is inserted into the mounting hole, the second O-ring is squeezed between the inner side of the mounting hole and the outer side of the shaft to limit the shaft in the mounting hole.

4. The assembly method of a cooling pump and a gearbox as described in claim 1, characterized in that: In step S3, the method of tightening the bolts with a tightening gun from the side of the coolant pump nut includes: the shaft body has through holes corresponding to the bolts one by one, the through holes penetrate the shaft body axially, and after the bolts and bolt holes are aligned one by one, the tightening gun is inserted from one end of the through hole to tighten the nut of the bolt.

5. The assembly method of a cooling pump and a gearbox as described in claim 1, characterized in that: In step S3, after the first bolt is tightened by the tightening gun, the shaft is pulled out axially, and then the remaining bolts are tightened one by one to complete the assembly of the coolant pump and the gearbox.

6. The assembly method of a cooling pump and a gearbox as described in claim 1, characterized in that: In step S2, the method of inserting one end of the cooling pump bolt into the gearbox mounting hole in the horizontal direction using the gripping aid includes: a limiting plate is provided at the end of the shaft away from the boss; the limiting plate is a ring-shaped structure protruding from the shaft. Hold the auxiliary tool and insert one end of the coolant pump bolt into the gearbox mounting hole in a horizontal direction until the limit plate abuts against the gearbox.

7. The assembly method of a cooling pump and a gearbox as described in claim 2, characterized in that: The outer circumferential end face of the boss is provided with an annular first groove, and the first O-ring is engaged in the first groove.

8. The assembly method of a cooling pump and a gearbox as described in claim 3, characterized in that: The outer circumferential end face of the shaft is provided with an annular second groove, and the second O-ring is engaged in the second groove.

9. The assembly method of a cooling pump and a gearbox as described in claim 7, characterized in that: The first O-ring protrudes 1mm to 3mm beyond the outer circumference of the boss.

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