Overturning assembly platform for reduction gearbox of electric drive axle of automobile

Abstract

The invention discloses an automobile electric drive axle reduction gearbox overturning and assembling platform which comprises an overturning module and a positioning and clamping module. The overturning module comprises a platform bottom plate, universal wheels, directional wheels, a left supporting column, a right rotating shaft bearing seat, a main rotating shaft, a positioning rotating shaft, a speed reducer mounting plate, a planetary speed reducer, a handle rotating shaft, a handle, a flat key, a limiting pin fixing plate, a spring limiting pin, a right supporting column, a left rotating shaft bearing seat and a flat key; the clamping module comprises an overturning positioning plate, a cylindrical positioning pin, a trimming pin, a quick clamp fixing block and a quick clamp. According to the overturning assembly platform, the original assembly mode is changed, three to four times of clamping assembly are changed into one-time clamping and fixing to complete the overall assembly of the electric drive axle reduction gearbox, the labor intensity of operators is reduced, the production time is saved, and the production efficiency is improved; according to the overturning assembly platform, the operation mode of repeated manual hoisting and carrying is replaced by assembly platform overturning, the problem of gear collision damage is avoided, and the product assembly quality is improved.

Description

Technical Field

[0001] The invention belongs to the field of mechanical assembly equipment, and relates to an automobile electric drive axle reduction box assembly platform, and in particular to an automobile electric drive axle reduction box flip assembly platform. Background Art

[0002] The primary function of the electric drive axle reduction gearbox in new energy vehicles is to receive power from the motor and transmit it to the axle shafts on both sides of the drive axle through speed reduction and torque increase. Compared to the power transmission of traditional automotive drive axles, the lack of a gearbox and drive shaft connection makes its structure more complex and its transmission ratio higher. Currently, electric drive axle reduction gearboxes are primarily parallel-axis structures, meaning the input and output shafts are parallel. Due to the need for a larger transmission ratio while maintaining a compact structure, reduction can only be achieved through a multi-stage shaft system, with two-stage and three-stage reduction gearboxes being the most common.

[0003] The design structure of the multi-stage shaft system gearbox requires assembly on different assembly surfaces during the assembly process. Depending on the structure, there are three to four assembly surfaces involved. After assembling one surface, the gearbox needs to be lifted and flipped over to the other surface for the next assembly step. The product clamping fixtures also need to be designed and manufactured in three to four sets, which brings great difficulties to the assembly of the gearbox and the design of the fixture. The lifting and flipping of the gearbox back and forth also brings the risk of gear collision. The gear structure inside the gearbox is cylindrical helical gear, and its matching precision is extremely high. The slightest bump will damage the transmission accuracy of the gears, causing quality problems such as abnormal noise and howling in the gearbox, which in turn affects the NVH performance of the entire vehicle. Summary of the Invention

[0004] The purpose of the present invention is to optimize the shortcomings of the existing assembly process, improve production efficiency and product quality, and provide a flip assembly platform for an automobile electric drive axle reduction gearbox.

[0005] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is as follows: A flip assembly platform for an electric drive axle reducer of an automobile comprises a flip module and a positioning clamping module. The flip module comprises: a platform base plate, a universal wheel, a directional wheel, a left support column, a right shaft bearing seat, a main shaft, a positioning shaft, a reducer mounting plate, a planetary reducer, a handle shaft, a handle, a flat key, a limit pin fixing plate, a spring limit pin, a right support column, a left shaft bearing seat, and a flat key; The clamping module includes: flip positioning plate, cylindrical positioning pin, chamfering pin, quick clamp fixing block, quick clamp; The left support column is installed on the left side of the plane of the platform base plate by bolts; the right support column is installed on the right side of the plane of the platform base plate by bolts; the universal wheel and the fixed wheel are fixed on the lower side of the mounting surface of the platform base plate by bolts and nuts; one end of the main rotating shaft is a stepped shaft, which is pressed into the bearing of the right rotating shaft bearing seat by interference fit; the right rotating shaft bearing seat is connected to the upper end face of the right support column by bolts; the positioning rotating shaft is pressed into the bearing of the left rotating shaft bearing seat by interference fit; a positioning pin hole is machined on the cylindrical surface of one end of the positioning rotating shaft cylinder, which is aligned with the axis; the left rotating shaft bearing seat is connected to the upper end face of the left support column by bolts.

[0006] Furthermore, the limit pin fixing plate is fixed to the upper end face of the left support column by bolts; the spring limit pin can be extended and retracted forward and backward, screwed into the threaded hole of the limit pin fixing plate through the front end thread, and locked by the built-in locking nut; after the spring limit pin is installed, the axis is at the same height as the axis of the positioning shaft.

[0007] Furthermore, the flip positioning plate is fixed to the flat threaded hole on the left side of the main shaft and the flat threaded hole on the right side of the positioning shaft by bolts; two countersunk holes are processed on the flip positioning plate, and the spacing between the countersunk holes is the same as the spacing between the positioning holes of the reducer; the cylindrical positioning pin and the chamfered pin are embedded in the countersunk holes on the flip positioning plate through interference fit; the quick clamp fixing block is fixed to the flip positioning plate by bolts; the quick clamp is fixed to the quick clamp fixing block by bolts.

[0008] Furthermore, the planetary reducer is fixed to the right side of the reducer mounting plate by bolts; the flat key is embedded in the keyway of the handle shaft; Furthermore, the handle shaft is inserted into the input shaft hole of the planetary reducer with an interference fit, and the relative rotation of the handle shaft and the planetary reducer input shaft is limited by a flat key; the center hole of the handle is fixed to the handle shaft by a bolt; the flat key is embedded in the keyway at one end of the main shaft; the main shaft is inserted into the output shaft hole of the planetary reducer, and the relative rotation of the main shaft and the planetary reducer output shaft is limited by a flat key; the reducer mounting plate is fixed to the right side of the right support column by bolts; the bolt fixing hole of the reducer mounting plate is a waist-shaped hole, which can be adjusted in height to ensure that the main shaft is coaxial with the planetary reducer output shaft.

[0009] Furthermore, after the handle is rotated, the rotation direction is changed through the planetary reducer, and then the main shaft and the flip positioning plate are driven to rotate. After the flip positioning plate is flipped to the specified angle, the spring limit pin is inserted into the positioning pin hole on the cylindrical surface of the positioning shaft to achieve flip positioning at different angles.

[0010] The beneficial effects of the present invention are: 1. The flip assembly platform of the present invention changes the original assembly method from three to four clamping assemblies to one clamping and fixing to complete the overall assembly of the electric drive axle reducer, reducing the labor intensity of the operator, saving production time, and improving production efficiency.

[0011] 2. The flip assembly platform of the present invention replaces the manual multiple lifting and handling operation mode by flipping the assembly platform, avoiding the problem of gear bumps and damages, and improving the product assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a schematic diagram of the isometric structure of the automotive electric drive axle reduction gearbox before the flip assembly platform is clamped; Figure 2 This is a schematic top view of the structure of the automobile electric drive axle reduction gearbox before the flip assembly platform is clamped; Figure 3 This is a schematic diagram of the isometric structure of the reduction gearbox A facing upwards after being clamped and fixed in accordance with the first embodiment of the present invention; Figure 4 This is a schematic diagram of the isometric structure of the reduction gearbox according to embodiment 1 of the present invention, with the reduction gearbox flipped 90° and the B surface facing upward; Figure 5 This is a schematic diagram of the isometric structure of the reduction gearbox in Example 1 of the present invention, with the reduction gearbox flipped 180° and facing upwards; Figure 6 This is a schematic diagram of the isometric structure of the reduction gearbox in Example 1 of the present invention, with the reduction gearbox flipped 270° and the D surface facing upward.

[0014] In the figure, the platform base plate 1, the universal wheel 2, the directional wheel 3, the left support column 4, the right shaft bearing seat 5, the main shaft 6, the positioning shaft 7, the flip positioning plate 8, the cylindrical positioning pin 9, the chamfered pin 10, the quick clamp fixing block 11, the quick clamp 12, the reducer mounting plate 13, the planetary reducer 14, the handle shaft 15, the handle 16, the flat key 17, the limit pin fixing plate 18, the spring limit pin 19, the right support column 20, the left shaft bearing seat 21, the flat key 22, and the reducer 23. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0016] Example 1: Take the assembly of the Jiangling E820 electric drive axle reduction gearbox as an example: The structure of the automobile electric drive axle reduction gearbox flip assembly platform is as follows Figure 1 , Figure 2 As shown: The assembly platform includes a flip module and a positioning and clamping module. The flip module includes: a platform base plate 1, a universal wheel 2, a directional wheel 3, a left support column 4, a right shaft bearing seat 5, a main shaft 6, a positioning shaft 7, a reducer mounting plate 13, a planetary reducer 14, a handle shaft 15, a handle 16, a flat key 17, a limit pin fixing plate 18, a spring limit pin 19, a right support column 20, a left shaft bearing seat 21, and a flat key 22; the clamping module includes: a flip positioning plate 8, a cylindrical positioning pin 9, a chamfering pin 10, a quick clamp fixing block 11, and a quick clamp 12.

[0017] The left support column 4 is installed on the left side of the upper plane of the platform base plate 1 by bolts; the right support column 20 is installed on the right side of the upper plane of the platform base plate 1 by bolts; the universal wheel 2 and the fixed wheel 3 are fixed on the lower side of the mounting surface of the platform base plate 1 by bolts and nuts; one end of the main rotating shaft 6 is a stepped shaft, which is pressed into the bearing of the right rotating shaft bearing seat 5 by interference fit; the right rotating shaft bearing seat 5 is connected to the upper end face of the right support column 20 by bolts; the positioning rotating shaft 7 is pressed into the bearing of the left rotating shaft bearing seat 21 by interference fit; 4 positioning pin holes are machined on the cylindrical surface of one end of the positioning rotating shaft 7 to align with the axis; the left rotating shaft bearing seat 21 is connected to the upper end face of the left support column 4 by bolts.

[0018] The limit pin fixing plate 18 is fixed to the upper end surface of the left support column 4 by bolts; the spring limit pin 19 can be extended and retracted forward and backward, and is screwed into the threaded hole of the limit pin fixing plate 18 through the front end thread, and is locked by the built-in locking nut; after the spring limit pin 19 is installed, the axis is at the same height as the axis of the positioning shaft 7.

[0019] The flip positioning plate 8 is fixed to the flat threaded hole on the left side of the main shaft 6 and the flat threaded hole on the right side of the positioning shaft 7 by bolts; two countersunk holes are machined on the flip positioning plate 8, and the spacing between the countersunk holes is the same as the spacing between the positioning holes of the reduction gearbox; the cylindrical positioning pin 9 and the chamfered pin 10 are embedded in the countersunk holes on the flip positioning plate 8 by interference fit; the quick clamp fixing block 11 is fixed to the flip positioning plate 8 by bolts; the quick clamp 12 is fixed to the quick clamp fixing block 11 by bolts; The planetary reducer 14 is fixed to the right side of the reducer mounting plate 13 by bolts; the flat key 17 is embedded in the keyway of the handle shaft 15; the handle shaft 15 is inserted into the input shaft hole of the planetary reducer 14 with interference fit, and the flat key 17 is used to limit the relative rotation of the handle shaft 15 and the input shaft of the planetary reducer 14; the center hole of the handle 16 is fixed to the handle shaft 15 by bolts; the flat key 22 is embedded in the keyway at one end of the main shaft 6; the main shaft 6 is inserted into the output shaft hole of the planetary reducer 14, and the relative rotation of the main shaft 6 and the output shaft of the planetary reducer 14 is limited by the flat key 22; the reducer mounting plate 13 is fixed to the right side of the right support column 20 by bolts; the bolt fixing hole of the reducer mounting plate 13 is a waist-shaped hole, which can be adjusted in height to ensure that the main shaft 6 is coaxial with the output shaft of the planetary reducer 14.

[0020] After the handle 16 rotates, the rotation direction is changed through the planetary reducer 14, and then the main shaft 6 and the flip positioning plate 8 are driven to rotate. After the flip positioning plate 8 is flipped to the specified angle, the spring limit pin 19 is inserted into the positioning pin hole on the cylindrical surface of the positioning shaft 7 to achieve flip positioning at different angles.

[0021] Reference Figures 3 to 6 The working principle of the invention is briefly described as follows: The Jiangling E820 electric drive axle reduction gearbox has a three-stage reduction structure, including three pairs of transmission gears, housings, housing covers, differentials, bearings, oil seals, adjustment rings and other components. During assembly, the housing needs to be adjusted three times and assembled on three different surfaces: Step 1: Move the automobile electric drive axle reduction gearbox flip assembly platform of the present invention to the operating station; Step 2: Hoist the reduction gearbox 23 housing to be assembled onto the flip positioning plate 8 and position it using the cylindrical positioning pins 9 and the chamfered pins 10; Step 3: Turn the quick clamp 12 handle to fix and clamp the gearbox housing; Step 4: Pull out the spring stop pin 19 from the pin hole of the positioning shaft 7, rotate the handle 16, turn the reduction gearbox 23 90 degrees with the B side facing upward, insert the spring stop pin 19 into the pin hole of the positioning shaft 7 and fix it, and assemble the first, second and third shafts of the reduction gearbox and the shell cover; Step 5: Pull out the spring stop pin 19 from the pin hole of the positioning shaft 7, rotate the handle 16 to turn the reduction gearbox 23 180° facing upward, insert the spring stop pin 19 into the pin hole of the positioning shaft 7 to fix it, install the reduction gearbox differential shaft, and adjust the differential bearing clearance; Step 6: Pull out the spring stop pin 19 from the pin hole of the positioning shaft 7, rotate the handle 16, turn the reduction gearbox 23 270 degrees with the D side facing upward, insert the spring stop pin 19 into the pin hole of the positioning shaft 7 and fix it, install the reduction gearbox input shaft oil seal and elastic retaining ring, and adjust the bearing clearance of the second and third axes; Step 7: Pull out the spring stop pin 19 from the pin hole of the positioning shaft 7, rotate the handle 16 to flip the reduction gearbox 23 360° with face A facing upward, insert the spring stop pin 19 into the pin hole of the positioning shaft 7 to fix it, then release the quick clamp 12 and hang the reduction gearbox onto the transfer rack; Step 8: Repeat steps 2 to 7 to assemble the next workpiece.

[0022] The present invention's flip assembly platform for electric drive axle gearboxes allows for single-step clamping and fixturing, enabling assembly of the electric drive axle gearbox in various positions. This eliminates the inefficiency associated with multiple lifting and clamping procedures required to assemble different parts of the gearbox, reducing operator workload, saving production time, and improving production efficiency. The complete assembly of the electric drive axle gearbox is accomplished in a single clamping operation, minimizing gear damage during the flipping and clamping process, thereby improving product assembly quality.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A turning assembly platform for an electric drive axle reduction gearbox of an automobile, comprising a turning module and a positioning and clamping module, characterized in that: The flip module comprises: a platform base plate (1), a universal wheel (2), a directional wheel (3), a left support column (4), a right shaft bearing seat (5), a main shaft (6), a positioning shaft (7), a reducer mounting plate (13), a planetary reducer (14), a handle shaft (15), a handle (16), a flat key (17), a limit pin fixing plate (18), a spring limit pin (19), a right support column (20), a left shaft bearing seat (21), and a flat key (22); The clamping module comprises: a flip positioning plate (8), a cylindrical positioning pin (9), a chamfered pin (10), a quick clamp fixing block (11), and a quick clamp (12); The left support column (4) is mounted on the left side of the upper plane of the platform base plate (1) by bolts; the right support column (20) is mounted on the right side of the upper plane of the platform base plate (1) by bolts; the universal wheel (2) and the fixed wheel (3) are fixedly mounted on the lower side of the mounting surface of the platform base plate (1) by bolts and nuts; one end of the main rotating shaft (6) is a stepped shaft, which is pressed into the bearing of the right rotating shaft bearing seat (5) by interference fit; the right rotating shaft bearing seat (5) is connected to the upper end face of the right support column (20) by bolts; the positioning rotating shaft (7) is pressed into the bearing of the left rotating shaft bearing seat (21) by interference fit; four positioning pin holes are machined on the cylindrical surface of one end of the positioning rotating shaft (7) to align with the axis; the left rotating shaft bearing seat (21) is connected to the upper end face of the left support column (4) by bolts.

2. The automobile electric drive axle reduction gearbox flip assembly platform according to claim 1, characterized in that: The limit pin fixing plate (18) is fixed to the upper end surface of the left support column (4) by bolts; the spring limit pin (19) can be extended and retracted forward and backward, is screwed into the threaded hole of the limit pin fixing plate (18) through the front thread, and is locked by the self-provided locking nut; after the spring limit pin (19) is installed, the axis thereof is at the same height as the axis of the positioning shaft (7).

3. The automobile electric drive axle reduction gearbox flip assembly platform according to claim 1, characterized in that: The flip positioning plate (8) is fixed to the left plane threaded hole of the main shaft (6) and the right plane threaded hole of the positioning shaft (7) by bolts; two countersunk holes are processed on the flip positioning plate (8), and the spacing between the countersunk holes is the same as the spacing between the positioning holes of the reduction gearbox; the cylindrical positioning pin (9) and the chamfered pin (10) are embedded in the countersunk holes on the flip positioning plate (8) by interference fit; the quick clamp fixing block (11) is fixed to the flip positioning plate (8) by bolts; and the quick clamp (12) is fixed to the quick clamp fixing block (11) by bolts.

4. The automobile electric drive axle reduction gearbox flip assembly platform according to claim 1, characterized in that: The planetary reducer (14) is fixed to the right side of the reducer mounting plate (13) by means of bolts; the flat key (17) is embedded in the keyway of the handle shaft (15).

5. The automobile electric drive axle reduction gearbox flip assembly platform according to claim 4, characterized in that: The handle shaft (15) is inserted into the input shaft hole of the planetary reducer (14) through interference fit, and the handle shaft (15) and the input shaft of the planetary reducer (14) are restricted from rotating relative to each other by a flat key (17); the center hole of the handle (16) is fixed to the handle shaft (15) by a bolt; the flat key (22) is embedded in the keyway at one end of the main shaft (6); the main shaft (6) is inserted into the output shaft hole of the planetary reducer (14), and the main shaft (6) and the output shaft of the planetary reducer (14) are restricted from rotating relative to each other by a flat key (22); the reducer mounting plate (13) is fixed to the right side of the right support column (20) by bolts; the bolt fixing hole of the reducer mounting plate (13) is a waist-shaped hole, which is adjustable in height to ensure that the main shaft (6) and the output shaft of the planetary reducer (14) are coaxial.

6. The automobile electric drive axle reduction gearbox flip assembly platform according to claim 1, characterized in that: After the handle (16) rotates, the rotation direction is changed through the planetary reducer (14), and then the main shaft (6) and the flip positioning plate (8) are driven to rotate. After the flip positioning plate (8) flips to a specified angle, the spring limit pin (19) is inserted into the positioning pin hole on the cylindrical surface of the positioning shaft (7), thereby realizing flip positioning at different angles.

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