An installation device and method for installing differential bearing retainer rings in an electric car

Abstract

The application discloses a mounting device for differential bearing retainer of an electric car, which comprises an ejection part and at least two connecting parts, the connecting parts are used for connecting with long bolts on the bearing retainer, the outer diameter of the connecting parts is smaller than the hole diameter of the mounting hole of the long bolts, the connecting parts are provided with inner threads matched with the long bolts, the connecting parts are connected to the ejection part through a soft steel wire and a circular ring sheet, one end of the soft steel wire is fixed to the circular ring sheet, and the other end of the soft steel wire is connected to the connecting part; the length of the soft steel wire is longer than the length of the long bolt, the lengths of the soft steel wires are consistent, the length of the ejection part is smaller than the width of one side shell of a transmission case of the electric car, and the diameter of the ejection part is smaller than the diameter of an output half shaft of the transmission case of the electric car. The mounting device is simple in structure, simple in machining and manufacturing, easy to install and connect, and can realize quick and convenient installation of the differential bearing retainer of the electric car.

Description

Technical Field

[0001] This invention belongs to the technical field of vehicle equipment installation devices, and relates to an installation device for a differential bearing retaining ring of an electric car. Background Technology

[0002] The electric car transmission includes a drive motor, a reducer input shaft, a reducer intermediate shaft, a differential assembly, an output half shaft, and two side housings. The two side housings of the transmission are integrally cast. The differential assembly is mounted in the housing via bearings. The axial positioning of one side bearing of the differential assembly relies on the housing and the bearing retainer ring, which is located between the large reduction gear of the differential and the bearing on one side of the differential assembly.

[0003] like Figure 2 As shown, the bearing retaining ring 2.2 is a circular plate with six bolts 2.1, each approximately 100 mm long and 2 mm in diameter, evenly distributed vertically on it. These six long bolts extend out of the housing through the mounting holes on one side of the housing and are secured with nuts. When installing the transmission box, since the large reduction gear of the differential is completely seated in the housing on one side, the bearing retaining ring can only be installed by using a long-handled screwdriver through the hole between the housing and the large gear of the differential to move the bearing retaining ring into place. This installation method is inefficient, difficult to install, and prone to causing damage to components. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide an installation device for the differential bearing retainer ring of an electric car, which solves the problem of component installation in the transmission box of an electric car and realizes the quick and convenient installation of the differential bearing retainer ring of an electric car.

[0005] Technical Solution: The present invention provides an installation device for a differential bearing retaining ring of an electric car, comprising an ejector portion and at least two connecting portions. The connecting portions are used to connect with long bolts on the bearing retaining ring. The outer diameter of the connecting portion is smaller than the diameter of the mounting hole of the long bolt. The connecting portion is provided with an internal thread that mates with the long bolt. The connecting portion is connected to the ejector portion via a soft steel wire and a circular ring. One end of the soft steel wire is fixed to the circular ring, and the other end of the soft steel wire is connected to the connecting portion. The length of the soft steel wire is longer than the length of the long bolt, and the lengths of the soft steel wires are consistent. The length of the ejector portion is smaller than the width of one side housing of the electric car transmission box, and the diameter of the ejector portion is smaller than the diameter of the output half shaft of the electric car transmission box.

[0006] Furthermore, the connecting part is a thin helical spring-shaped component, the wire diameter, pitch, rotation direction and outer diameter of the thin helical spring-shaped component are equivalent to the internal thread, and the thin helical spring-shaped component is a rigid component.

[0007] Furthermore, the axial distance between the annular plate and the ejector portion is adjustable.

[0008] Furthermore, the mounting device also includes a handheld part, which is in the shape of a round handle. One end of the handheld part is fixed to the ejector part and the annular piece is fixed at the center of the ejector part.

[0009] Furthermore, there are 6 connecting parts, each corresponding to a 6-wire flexible steel wire.

[0010] Furthermore, one end of the soft steel wire is symmetrically arranged on the annular plate.

[0011] Furthermore, the ejector portion is cylindrical.

[0012] Furthermore, the ejector portion is made of a non-metallic material.

[0013] Furthermore, the connecting part is provided with a connecting hole, through which the soft steel wire passes and is connected by a connecting block with a diameter larger than that of the connecting hole.

[0014] Furthermore, a method for using an installation device for a differential bearing retaining ring in an electric passenger car is provided, comprising the following steps:

[0015] Step 1: When installing the transmission case, before installing the differential assembly, use the electric car differential bearing retainer mounting device to pass the connecting part and the soft steel wire through the long bolt mounting hole on the differential side of the housing from the outside of one side of the transmission case housing.

[0016] Step 2: Place the other end of the ejector portion, which corresponds to the fixed end of the annular plate, into the output half-shaft hole on one side of the housing;

[0017] Step 3: After the connecting part extends into one side of the housing and is fully exposed, connect the connecting part to the two symmetrical long bolts on the differential bearing retaining ring.

[0018] Step 4: Slowly insert the differential assembly. After the differential assembly sits on the mounting seat of one side of the housing, the output half shaft will completely push out the ejector part. Driven by the ejector part, the ring plate and the soft steel wire, the connecting part and the long bolt of the differential bearing retaining ring connected to the connecting part are pulled out of the housing.

[0019] Step 5: Loosen the connection and secure it with the retaining nut of the differential bearing retainer ring.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The installation device for the electric car differential bearing retainer ring of the present invention has a simple structure, is easy to process and manufacture, and is easy to install and connect during operation, which can realize the quick and convenient installation of the electric car differential bearing retainer ring. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the mounting device for the differential bearing retainer ring of the electric car according to the present invention.

[0022] Figure 2 This is a schematic diagram of the retaining ring of the differential bearing in an electric car.

[0023] Figure 3 for Figure 1 A magnified view of the connection at point A.

[0024] Figure 4 for Figure 1 The diagram shows the structure of the connecting part at point A, which is a thin spiral spring-shaped component.

[0025] In the diagram: 1.1-Connecting part; 1.2-Soft steel wire; 1.3-Handheld part; 1.4-Circular ring plate; 1.5-Ejecting part; 2.1-Long bolt; 2.2-Bearing retaining ring; 1.1.1-Internal thread; 1.1.2-Connecting block; 1.1.3-Helical spring-shaped component. Detailed Implementation

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0027] The mounting device for the differential bearing retainer ring of the electric car of the present invention is used for the installation of the electric car transmission box. The electric car transmission box includes a drive motor, a reducer input shaft, a reducer intermediate shaft, a differential assembly, an output half shaft, and two side housings. The two side housings of the transmission box are integrally cast. The differential assembly is mounted in the housing through bearings. The axial positioning of the bearing on one side of the differential assembly relies on the housing and the bearing retainer ring 2.2. The bearing retainer ring 2.2 is located between the large reduction gear of the differential and the bearing on one side of the differential assembly.

[0028] like Figure 2 As shown, the bearing retaining ring 2.2 is circular in shape, with 6 long bolts 2.1 evenly distributed vertically on it. During installation, the 6 long bolts 2.1 should pass through the mounting holes on one side of the housing, extend beyond the housing, and then be fixed with a fixing nut.

[0029] like Figure 1 , Figure 3As shown, the mounting device for the differential bearing retaining ring 2.2 of an electric car includes an ejector portion 1.5 and at least two connecting portions 1.1. The connecting portions 1.1 are used to connect with the long bolts 2.1 on the bearing retaining ring 2.2. The outer diameter of the connecting portion 1.1 is smaller than the diameter of the mounting hole of the long bolts 2.1, so that the connecting portion 1.1 can move in the mounting hole and pass through the mounting hole. The connecting portion 1.1 is provided with an internal thread 1.1.1 that mates with the long bolts 2.1, so that the connecting portion 1.1 can be connected with the long bolts 2.1. The connecting part 1.1 is connected to the ejector part 1.5 via a soft steel wire 1.2 and a circular ring plate 1.4. One end of the soft steel wire 1.2 is fixed to the circular ring plate 1.4, and the other end of the soft steel wire 1.2 is connected to the connecting part 1.1. In a specific embodiment, the connecting part 1.1 is provided with a connecting hole, through which the soft steel wire 1.2 passes. The connecting part 1.1 and the soft steel wire 1.2 are connected by a connecting block 1.1.2 with a diameter larger than that of the connecting hole.

[0030] like Figure 4 As shown, as a preferred embodiment, the connecting part 1.1 is configured as a thin helical spring-shaped component 1.1.3. The wire diameter, pitch, rotation direction and outer diameter of the thin helical spring-shaped component 1.1.3 are equivalent to those of the internal thread 1.1.1, and the helical spring-shaped component 1.1.3 is a rigid component. This can further reduce the outer diameter of the connecting part 1.1 and improve adaptability.

[0031] In a specific embodiment, the number of connecting parts 1.1 and long bolts 2.1 is the same, which is set to 6. The corresponding number of soft steel wires 1.2 is 6. One end of the 6 soft steel wires 1.2 is symmetrically arranged on the annular plate 1.4. The length of the soft steel wires 1.2 is slightly greater than the length of the long bolts 2.1, which can ensure that the connecting parts 1.1 can pull the long bolts 2.1 out of the outer side of the housing. And all the soft steel wires 1.2 have the same length.

[0032] In a specific embodiment, the length of the ejector portion 1.5 is slightly less than the width of one side of the electric vehicle transmission housing, and the diameter of the ejector portion 1.5 is slightly less than the diameter of the output half-shaft of the electric vehicle transmission housing. The distance between the annular plate 1.4 and the fixed end of the ejector portion 1.5 is adjustable, making it suitable for different vehicle models. Since the housing widths of different vehicle models are inconsistent, this adjustable design facilitates adjustment according to specific circumstances during assembly, making the installation of the device easier. The ejector portion 1.5 is made of non-metallic material, which can prevent damage to the outer surface of the component during assembly. At the same time, the ejector portion 1.5 is cylindrical, making operation more convenient. Furthermore, the installation device also includes a handle portion 1.3, which is round and fixed to one end of the ejector portion 1.5. One end of the handle portion 1.3 fixes the annular plate 1.4 at the center of the ejector portion 1.5.

[0033] To address the problems of low installation efficiency, difficulty in installation, and easy damage to components caused by traditional installation methods, the electric car differential bearing retainer ring installation device of this invention is used to position and install the bearing retainer ring 2.2, and the following steps are adopted:

[0034] Step 1: When installing the electric car transmission, before installing the differential assembly, use the installation device for the electric car differential bearing retainer ring 2.2 to pass the connecting part 1.1 and the soft steel wire 1.2 through the long bolt mounting hole on the differential side of the housing from the outside of one side of the transmission housing.

[0035] Step 2: Using the hand-held part 1.3, place the other end of the ejector part 1.5, which corresponds to the fixed end of the annular piece 1.4, into the output half-shaft hole on one side of the housing;

[0036] Step 3: After the connecting part 1.1 extends into one side of the housing and is fully exposed, use the internal thread 1.1.1 to connect the connecting part 1.1 to the two symmetrical long bolts 2.1 on the differential bearing retaining ring 2.2.

[0037] Step 4: Slowly insert the differential assembly. After the differential sits on the mounting seat of one side of the housing, the output half shaft will fully push out the ejector part 1.5. Driven by the ejector part 1.5, the ring plate 1.4 and the soft steel wire 1.2, the connecting part 1.1 and the long bolt 2.1 of the differential bearing retaining ring 2.2 connected to the connecting part 1.1 are pulled out of the housing.

[0038] Step 5: Loosen the connecting part 1.1 from the long bolt 2.1, and fix it with the fixing nut of the differential bearing retaining ring 2.2.

Claims

1. A mounting device for a differential bearing retaining ring in an electric passenger car, characterized in that, The device includes an ejector portion and at least two connecting portions. The connecting portions are used to connect with long bolts on the bearing retaining ring. The outer diameter of the connecting portion is smaller than the diameter of the mounting hole of the long bolt. The connecting portion is provided with an internal thread that mates with the long bolt. The connecting portion is connected to the ejector portion via a soft steel wire and a circular ring. One end of the soft steel wire is fixed to the circular ring, and the other end of the soft steel wire is connected to the connecting portion. The length of the soft steel wire is longer than the length of the long bolt, and the lengths of the soft steel wires are the same. The length of the ejector portion is smaller than the width of one side housing of the electric vehicle transmission box, and the diameter of the ejector portion is smaller than the diameter of the output half shaft of the electric vehicle transmission box.

2. The mounting device for the differential bearing retaining ring of an electric passenger car according to claim 1, characterized in that, The connecting part is a thin helical spring-shaped component. The wire diameter, pitch, rotation direction, and outer diameter of the thin helical spring-shaped component are equivalent to those of the internal thread. The thin helical spring-shaped component is a rigid component.

3. The mounting device for the differential bearing retaining ring of an electric passenger car according to claim 1, characterized in that, The axial distance between the annular plate and the ejector portion is adjustable.

4. The mounting device for the differential bearing retaining ring of an electric passenger car according to claim 1, characterized in that, The mounting device also includes a hand-held part, which is in the shape of a round handle. One end of the hand-held part is fixed to the ejector part and the annular piece is fixed at the center of the ejector part.

5. The mounting device for the differential bearing retaining ring of an electric passenger car according to claim 1, characterized in that, There are 6 connecting parts, each corresponding to a 6-wire flexible steel wire.

6. The mounting device for the differential bearing retaining ring of an electric passenger car according to claim 5, characterized in that, The soft steel wires are symmetrically arranged on the annular plate at one end.

7. The mounting device for the differential bearing retaining ring of an electric passenger car according to claim 1, characterized in that, The top portion is cylindrical.

8. The mounting device for the differential bearing retaining ring of an electric passenger car according to claim 1, characterized in that, The top part is made of non-metallic material.

9. The mounting device for the differential bearing retaining ring of an electric passenger car according to claim 1 or 2, characterized in that, The connecting part is provided with a connecting hole, through which the soft steel wire passes and is connected by a connecting block with a diameter larger than that of the connecting hole.

10. The method of using the mounting device for the differential bearing retaining ring of an electric passenger car according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: When installing the transmission case, before installing the differential assembly, use the electric car differential bearing retainer mounting device to pass the connecting part and the soft steel wire through the long bolt mounting hole on the differential side of the housing from the outside of one side of the transmission case housing. Step 2: Place the other end of the ejector portion, which corresponds to the fixed end of the annular plate, into the output half-shaft hole on one side of the housing; Step 3: After the connecting part extends into one side of the housing and is fully exposed, connect the connecting part to the two symmetrical long bolts on the differential bearing retaining ring. Step 4: Slowly insert the differential assembly. After the differential assembly sits on the mounting seat of one side of the housing, the output half shaft will completely push out the ejector part. Driven by the ejector part, the ring plate and the soft steel wire, the connecting part and the long bolt of the differential bearing retaining ring connected to the connecting part are pulled out of the housing. Step 5: Loosen the connection and secure it with the retaining nut of the differential bearing retainer ring.

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