Electric bicycle permanent magnet brushless hub motor oil seal installation device

Abstract

The utility model discloses an electric bicycle permanent magnet brushless hub motor oil seal installation device, which relates to the motor field, and comprises a rack, the bottom end of the inner side of the rack is fixedly connected with a placing table, the upper end of the placing table is provided with a placing groove, and the bottom end of the inner side of the placing groove is provided with a pre-positioning groove. A driving cavity is formed in the position, located on the outer side of the containing groove, in the containing table, four sets of air cylinders are fixedly installed in the driving cavity, the output ends of the four sets of air cylinders penetrate through the four inner walls of the containing groove correspondingly and are fixedly connected with arc-shaped clamping plates, and an oil seal extracting and installing assembly is arranged at the top end of the inner side of the rack; through the design of the oil seal extracting and installing assembly, extracting, positioning and installing of the oil seal are automatically completed, manual intervention is reduced, the installing precision can be improved, the stability of the hub motor in the whole installing process can be guaranteed through the pre-positioning groove and the arc-shaped clamping plate, and improper oil seal installing caused by position deviation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of motors, specifically to an oil seal mounting device for a permanent magnet brushless hub motor for electric bicycles. Background Technology

[0002] As a green mode of transportation, electric bicycles typically use hub motors in their power systems. Among them, permanent magnet brushless hub motors are widely used due to their advantages such as simple structure, high power, and low maintenance. In hub motors, oil seals are important components used to prevent lubricating oil leakage and protect the motor's interior from dust and dirt intrusion. The installation accuracy of the oil seals directly affects the sealing effect and service life of the motor.

[0003] Currently, the oil seal installation method for permanent magnet brushless hub motors in electric bicycles is relatively traditional, usually involving manual pressing or installation using simple tools. This installation method has low efficiency and is prone to uneven installation, poor sealing effect, and may even damage the motor, affecting its performance and service life. Therefore, an oil seal installation device for permanent magnet brushless hub motors in electric bicycles is proposed to solve the problems mentioned above. Utility Model Content

[0004] To solve the above-mentioned technical problems, an oil seal installation device for permanent magnet brushless hub motors of electric bicycles is provided. This technical solution addresses the problem mentioned in the background art that the current oil seal installation method for permanent magnet brushless hub motors of electric bicycles is relatively traditional. It is usually installed by manual pressing or using simple tools. This installation method has low installation efficiency and is prone to uneven oil seal installation, poor sealing effect, and may even damage the motor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An oil seal installation device for a permanent magnet brushless hub motor of an electric bicycle includes a frame. A placement platform is fixedly connected to the bottom inner side of the frame. A placement groove is opened at the top of the placement platform. A pre-positioning groove is opened at the bottom inner side of the placement groove. A drive chamber is set inside the placement platform outside the placement groove. Four sets of cylinders are fixedly installed inside the drive chamber. The output ends of the four sets of cylinders pass through the four inner walls of the placement groove and are fixedly connected to arc-shaped clamps. An oil seal extraction and installation assembly is set at the top inner side of the frame.

[0007] The oil seal extraction and installation assembly includes a movable base. Four evenly distributed electric push rods are fixedly installed at the lower end of the movable base. A lifting plate is fixedly connected to the output end of the electric push rods. A fixed sleeve is fixedly connected to the lower end of the lifting plate. A fixed ring is fixedly connected to the outer surface of the fixed sleeve. Four evenly distributed guide rods are fixedly connected between the fixed ring and the lifting plate. A sliding ring is slidably connected to the outer surface of the guide rod. Four evenly distributed connecting rods are fixedly connected to the lower end of the sliding ring. The lower end of the connecting rod passes through the upper end of the fixed ring and is fixedly connected to a push plate.

[0008] Preferably, the lower end of the fixed sleeve has a receiving cavity, and a first fixed plate and a second fixed plate are fixedly connected inside the receiving cavity. A first lead screw is rotatably connected between the first fixed plate and the second fixed plate, and a drive motor for driving the first lead screw to rotate is fixedly installed on the upper end of the second fixed plate.

[0009] Preferably, the outer surface of the fixed sleeve is provided with four evenly distributed sliding grooves between the first fixed plate and the second fixed plate, and the sliding ring is slidably connected to the inside of the sliding grooves.

[0010] Preferably, the sliding ring is threaded onto the outer surface of the first lead screw.

[0011] Preferably, a groove is provided at the top inner side of the frame, and a second lead screw is rotatably connected inside the groove, with the movable seat threadedly connected to the outer surface of the second lead screw.

[0012] Preferably, the outer edge of the lower end of the fixing sleeve is rounded.

[0013] The advantages of this utility model compared with the prior art are:

[0014] This solution proposes an oil seal installation device for a permanent magnet brushless hub motor of an electric bicycle. Through the design of the oil seal extraction and installation components, the extraction, positioning and installation of the oil seal are completed automatically, reducing manual intervention and helping to improve installation accuracy. The pre-positioning groove and arc-shaped clamping plate can ensure the stability of the hub motor throughout the installation process, avoiding improper oil seal installation due to positional deviation. At the same time, the outer surface of the fixing sleeve is rounded to reduce friction and damage during the oil seal installation process, thereby improving assembly efficiency and quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the placement platform in this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the oil seal extraction and installation assembly in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the first lead screw in this utility model;

[0019] Figure 5 This is a schematic diagram of the connecting rod in this utility model;

[0020] Figure 6 This is a schematic diagram of the sliding groove in this utility model;

[0021] Figure 7 This is a schematic diagram showing the connection between the fixed sleeve and the sliding ring in this utility model;

[0022] Figure 8 This is a schematic diagram of the slide groove in this utility model.

[0023] The numbers on the map are:

[0024] 1. Frame; 2. Placement platform; 3. Placement slot; 4. Pre-positioning slot; 5. Drive cavity; 6. Cylinder; 7. Arc-shaped clamp;

[0025] 8. Oil seal extraction and installation assembly; 801. Movable seat; 802. Electric push rod; 803. Lifting plate; 804. Fixed sleeve; 8041. Receiving cavity; 805. Fixed ring; 806. Guide rod; 807. Sliding ring; 808. Connecting rod; 809. Push plate; 8010. Sliding groove; 8011. First fixed plate; 8012. Second fixed plate; 8013. First lead screw; 8014. Drive motor;

[0026] 9. Slide groove; 10. Second lead screw. Detailed Implementation

[0027] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0028] Reference Figures 1-8 As shown, an oil seal installation device for a permanent magnet brushless hub motor of an electric bicycle includes a frame 1. A placement platform 2 is fixedly connected to the bottom inner side of the frame 1. A placement groove 3 is opened at the top of the placement platform 2. A pre-positioning groove 4 is opened at the bottom inner side of the placement groove 3. A drive chamber 5 is provided inside the placement platform 2 outside the placement groove 3. Four sets of cylinders 6 are fixedly installed inside the drive chamber 5. The output ends of the four sets of cylinders 6 pass through the four inner walls of the placement groove 3 and are fixedly connected to arc-shaped clamps 7. An oil seal extraction and installation assembly 8 is provided at the top inner side of the frame 1.

[0029] The oil seal extraction and installation assembly 8 includes a movable base 801. Four evenly distributed electric push rods 802 are fixedly installed at the lower end of the movable base 801. A lifting plate 803 is fixedly connected to the output end of the electric push rods 802. A fixed sleeve 804 is fixedly connected to the lower end of the lifting plate 803. A fixed ring 805 is fixedly connected to the outer surface of the fixed sleeve 804. Four evenly distributed guide rods 806 are fixedly connected between the fixed ring 805 and the lifting plate 803. A sliding ring 807 is slidably connected to the outer surface of the guide rod 806. Four evenly distributed connecting rods 808 are fixedly connected to the lower end of the sliding ring 807. The lower end of the connecting rod 808 passes through the upper end of the fixed ring 805 and is fixedly connected to a push plate 809.

[0030] Furthermore, the dimensions of the prepositioning slot 4 are consistent with the bottom dimensions of the hub motor to be processed. By aligning the lower end of the hub motor with the prepositioning slot 4 and placing it in the prepositioning slot 4, the hub motor can be initially positioned. After the hub motor is placed, the four sets of cylinders 6 will push the four arc-shaped clamps 7 to retract inward, thereby clamping and fixing the hub motor with the four arc-shaped clamps 7 to prevent the hub motor from shifting during the installation of the oil seal, thus affecting the installation accuracy. The placement and removal of the hub motor can be carried out by mechanical grippers to further improve the level of automation.

[0031] Furthermore, the area on the outer surface of the fixing sleeve 804 located at the lower end of the push plate 809 is used to fit the oil seal, and the outer diameter of the fixing sleeve 804 is the same as the inner diameter of the oil seal to be installed.

[0032] Furthermore, a groove 9 is provided at the top inner side of the frame 1. A second lead screw 10 is rotatably connected inside the groove 9. A movable seat 801 is threaded to the outer surface of the second lead screw 10. The rotation of the second lead screw 10 is driven by an external motor. The motor drives the second lead screw 10 to rotate, which can drive the oil seal extraction and installation assembly 8 to move horizontally. The area located at the right end of the placement platform 2 is used to set up a feeding mechanism to supply oil seals. By moving the oil seal extraction and installation assembly 8 above the feeding mechanism and aligning the lower end of the fixing sleeve 804 with the inner ring of the oil seal, the electric push rod 802 drives the lifting plate 803 to press down, so that the fixing sleeve 804 is inserted into the inner ring of the oil seal. At this time, the oil seal is fixed to the outer surface of the fixing sleeve 804 by friction. The electric push rod 802 resets, and the motor drives the second lead screw 10 to rotate in the opposite direction, so that the oil seal extraction and installation assembly 8 returns to the top of the placement platform 2 to prepare for the installation of the oil seal.

[0033] Furthermore, the outer edge of the lower end of the fixing sleeve 804 is rounded. The rounding reduces friction and sharp edge contact between the lower end of the fixing sleeve 804 and the inner side of the oil seal, thereby effectively reducing the risk of damage to the oil seal during extraction and installation. At the same time, the rounding allows the fixing sleeve 804 to be inserted into the inner side of the oil seal more smoothly, avoiding jamming or uneven pressure distribution that may be caused by sharp edges, thereby improving assembly efficiency and quality.

[0034] Furthermore, the lower end of the fixed sleeve 804 is provided with a receiving cavity 8041. A first fixed plate 8011 and a second fixed plate 8012 are fixedly connected inside the receiving cavity 8041. A first lead screw 8013 is rotatably connected between the first fixed plate 8011 and the second fixed plate 8012. A drive motor 8014 for driving the first lead screw 8013 to rotate is fixedly installed on the upper end of the second fixed plate 8012.

[0035] Furthermore, the outer surface of the fixed sleeve 804 is provided with four evenly distributed sliding grooves 8010 that pass through between the first fixed plate 8011 and the second fixed plate 8012, and the sliding ring 807 is slidably connected to the inside of the sliding grooves 8010.

[0036] Furthermore, the sliding ring 807 is threaded onto the outer surface of the first lead screw 8013.

[0037] Furthermore, after the hub motor is placed and the oil seal extraction and installation assembly 8 completes the oil seal extraction operation, the electric push rod 802 drives the lifting plate 803 to descend, so that the oil seal on the fixed sleeve 804 is close to the corresponding installation position. When the oil seal reaches the target position, the drive motor 8014 drives the first lead screw 8013 to rotate, which can drive the sliding ring 807 to descend. Under the action of the connecting rod 808, the push plate 809 will descend synchronously, thereby pushing the oil seal on the fixed sleeve 804 out and installing it in the designated position.

[0038] Working principle: During use, the bottom end of the hub motor is aligned with the pre-positioning slot 4 by the mechanical grippers and placed on the placement platform 2. At this time, the four arc-shaped clamping plates 7 driven by the cylinder 6 retract inward to firmly clamp the hub motor and prevent displacement during installation. Then, the oil seal extraction and installation assembly 8 moves to the top of the feeding mechanism by the rotation of the second lead screw 10 driven by the motor. Then, the electric push rod 802 drives the lifting plate 803, so that the lower end of the fixed sleeve 804 is inserted into the inner ring of the oil seal, completing the extraction of the oil seal. Then, the oil seal extraction and installation assembly 8 returns to the top of the placement platform 2 under the drive of the second lead screw 10. After that, the electric push rod 802 drives the lifting plate 803 to descend, so that the oil seal on the fixed sleeve 804 is close to the corresponding installation position. When the oil seal reaches the target position, the drive motor 8014 drives the first lead screw 8013 to rotate, which drives the sliding ring 807 to descend. Under the action of the connecting rod 808, the push plate 809 will descend synchronously, thereby pushing the oil seal on the fixed sleeve 804 out and installing it in the designated position.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet brushless hub motor oil seal mounting device for electric bicycles, characterized in that, The machine includes a frame (1), a placement platform (2) is fixedly connected to the bottom inner side of the frame (1), a placement groove (3) is opened at the top of the placement platform (2), a pre-positioning groove (4) is opened at the bottom inner side of the placement groove (3), a drive chamber (5) is provided inside the placement platform (2) outside the placement groove (3), four sets of cylinders (6) are fixedly installed inside the drive chamber (5), the output ends of the four sets of cylinders (6) respectively penetrate through the four inner walls of the placement groove (3) and are fixedly connected to arc-shaped clamps (7), and an oil seal extraction and installation assembly (8) is provided at the top inner side of the frame (1). The oil seal extraction and installation assembly (8) includes a movable base (801), four evenly distributed electric push rods (802) are fixedly installed at the lower end of the movable base (801), a lifting plate (803) is fixedly connected to the output end of the electric push rods (802), a fixed sleeve (804) is fixedly connected to the lower end of the lifting plate (803), a fixed ring (805) is fixedly connected to the outer surface of the fixed sleeve (804), four evenly distributed guide rods (806) are fixedly connected between the fixed ring (805) and the lifting plate (803), a sliding ring (807) is slidably connected to the outer surface of the guide rod (806), four evenly distributed connecting rods (808) are fixedly connected to the lower end of the sliding ring (807), and the lower end of the connecting rod (808) passes through the upper end of the fixed ring (805) and is fixedly connected to a push plate (809).

2. The oil seal mounting device for a permanent magnet brushless hub motor of an electric bicycle according to claim 1, characterized in that: The lower end of the fixed sleeve (804) is provided with a receiving cavity (8041). A first fixed plate (8011) and a second fixed plate (8012) are fixedly connected inside the receiving cavity (8041). A first lead screw (8013) is rotatably connected between the first fixed plate (8011) and the second fixed plate (8012). A drive motor (8014) for driving the first lead screw (8013) to rotate is fixedly installed on the upper end of the second fixed plate (8012).

3. The oil seal mounting device for a permanent magnet brushless hub motor of an electric bicycle according to claim 1, characterized in that: The outer surface of the fixed sleeve (804) is provided with four evenly distributed sliding grooves (8010) that pass through between the first fixed plate (8011) and the second fixed plate (8012), and the sliding ring (807) is slidably connected to the inside of the sliding grooves (8010).

4. The oil seal mounting device for a permanent magnet brushless hub motor of an electric bicycle according to claim 1, characterized in that: The sliding ring (807) is threaded to the outer surface of the first lead screw (8013).

5. The oil seal mounting device for a permanent magnet brushless hub motor of an electric bicycle according to claim 1, characterized in that: The inner top of the frame (1) is provided with a slide groove (9), and a second lead screw (10) is rotatably connected inside the slide groove (9). The moving seat (801) is threaded to the outer surface of the second lead screw (10).

6. The oil seal mounting device for a permanent magnet brushless hub motor of an electric bicycle according to claim 1, characterized in that: The outer edge of the lower end of the fixed sleeve (804) is rounded.

Images