Automobile motor output shaft automatic assembling device and assembling method

Abstract

The application discloses an automatic assembling device and method for a motor output shaft of an automobile, and is applied to the technical field of the automatic assembling device for the output shaft.The technical scheme points of the application are as follows: a rack is included; a shell positioning assembly for conveying and positioning a differential shell is fixedly connected to the bottom of the rack; a horizontal sliding seat is slidingly connected to the top of the rack along the horizontal direction based on a horizontal screw sliding assembly; an expansion holding assembly is movably connected to the horizontal sliding seat based on a vertical guide press-fitting assembly, and a rotating driving assembly for driving the expansion holding assembly to rotate as a whole is fixedly connected to the horizontal sliding seat; an elastic abutting assembly for applying an elastic abutting force to the output shaft is fixedly connected to the expansion holding assembly in a concentric mode, so that the output shaft is automatically driven to be inserted into the inner tooth groove when the outer tooth part of the output shaft is rotated to be aligned with the inner tooth groove of the differential assembly.The application has the technical effect of guaranteeing the assembling precision and the assembling efficiency while reducing the manufacturing cost of the equipment.

Description

Technical Field

[0001] This invention relates to the field of automatic output shaft assembly devices, and particularly to an automatic assembly device and method for automotive motor output shafts. Background Technology

[0002] As attached Figure 1 As shown, in the manufacturing process of automotive differential assemblies, it is necessary to insert the output shaft with external teeth into the differential assembly with internal teeth, ensuring precise meshing between the external teeth and the internal teeth. At the same time, the bearing needs to be pressed into the bearing housing of the differential assembly. If the external teeth and the internal teeth are not fully aligned during the pressing process, the huge pressing force will directly cause damage to the surface of the external teeth of the output shaft and the internal teeth of the differential assembly, thereby affecting the overall transmission performance and service life. Therefore, the precise assembly of the output shaft assembly and the differential assembly is a key link to achieve reliable power output.

[0003] Currently, existing technologies typically use vision sensors to identify the phase relationship between the tooth tip and the tooth groove, and then use a precise angle adjustment structure to adjust the circumferential angle of one of the teeth before insertion and assembly. However, the existing assembly method has two main drawbacks. First, due to the extremely small tooth gaps, the existing technology requires vision sensors and high-precision angle adjustment structures to identify and adjust the relative position between the tooth tip and the tooth groove, which significantly increases the overall manufacturing cost of the equipment. Second, the existing technology divides the assembly process of the output shaft assembly and the differential teeth into two stages: meshing angle identification and adjustment, and output shaft pressing. Furthermore, the workpiece can only be transferred to the next station for bearing pressing after the output shaft assembly is completed. This extends the overall cycle time and introduces additional positioning errors due to the secondary transfer and clamping of the workpiece, reducing assembly accuracy and efficiency, and increasing the overall size of the equipment. Therefore, it is necessary to improve the existing technology to ensure assembly accuracy and efficiency while reducing the manufacturing cost of the equipment. Summary of the Invention

[0004] The primary objective of this invention is to provide an automatic assembly device for automotive motor output shafts, which has the advantage of ensuring assembly accuracy and efficiency while reducing the manufacturing cost of the equipment.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an automatic assembly device for an automotive motor output shaft, comprising a frame; a housing positioning assembly for conveying and positioning a differential housing is fixedly connected to the bottom of the frame; a horizontal sliding seat is slidably connected to the top of the frame based on a horizontal lead screw sliding assembly along the horizontal direction; a tensioning and holding assembly for holding the output shaft is movably connected to the horizontal sliding seat based on a vertical guide pressing assembly, and a rotation drive assembly for driving the tensioning and holding assembly to rotate as a whole is fixedly connected; an elastic abutment assembly for applying an elastic abutment force to the output shaft is concentrically fixedly connected to the tensioning and holding assembly, so as to automatically drive the output shaft to insert into the elastic abutment assembly in the inner tooth groove when the outer tooth of the output shaft rotates to align with the inner tooth groove of the differential assembly.

[0006] The present invention is further configured such that: the housing positioning assembly includes a housing conveying line fixedly connected to the bottom of the frame in the horizontal direction for conveying the differential housing; a vertical lifting seat is movably connected to the frame in the vertical direction based on a lifting positioning cylinder; and a support tray for positioning the differential housing and at least two positioning pins are fixedly connected to the vertical lifting seat.

[0007] The present invention is further configured such that: the vertical guide pressing assembly includes a vertical guide slide rail symmetrically and fixedly connected to the horizontal sliding seat along the vertical direction, and a vertical pressing seat slidably connected to the vertical guide slide rail based on a vertical slider; the tensioning and holding assembly and the rotary drive assembly are both fixedly connected to the vertical pressing seat; and a vertical pressing electric cylinder that drives the vertical pressing seat to rise and fall is fixedly connected to the horizontal sliding seat along the vertical direction.

[0008] The present invention is further configured such that: the tensioning and holding assembly includes a pressure cylinder fixedly connected to the vertical pressure mounting base along the vertical direction; a tensioning cylinder is concentrically movably connected inside the pressure mounting cylinder along the vertical direction; a tensioning sleeve is integrally connected to the bottom of the tensioning cylinder; an abutting compression sleeve for compressing the tensioning sleeve to clamp and fix the output shaft inside the tensioning sleeve is movably connected between the tensioning cylinder and the pressure mounting cylinder along the vertical direction based on a vertical telescopic cylinder; and a push-off rod for abutting the head of the output shaft to push the output shaft apart after the pressure mounting is completed is concentrically slidably connected inside the tensioning cylinder based on a first return spring along the vertical direction.

[0009] The present invention is further configured such that: the elastic abutment assembly includes an abutment fixing seat concentrically fixed to the bottom of the press-fit cylinder, and an abutment movable seat concentrically slidably connected to the top of the press-fit cylinder; the expansion cylinder and the vertical telescopic cylinder are both fixedly connected to the abutment movable seat; a plurality of vertical guide rods are circumferentially fixedly connected to the abutment fixing seat; the abutment movable seat is also provided with a vertical guide hole that cooperates with the vertical guide rod; a blocking plate is fixedly provided at the end of the vertical guide rod away from the abutment fixing seat; an upper abutment spring is sleeved and fixedly connected between the vertical guide rod and the blocking plate and the abutment movable seat; a lower abutment spring is sleeved and fixedly connected between the abutment movable seat and the abutment fixing seat; a detection column is fixedly provided on the abutment movable seat; and a laser ranging sensor for detecting the distance between the vertical press-fit seat and the detection column is fixedly connected to the vertical press-fit seat.

[0010] The present invention is further configured such that: a plurality of vertical through rods passing through the movable abutment seat are uniformly fixedly connected along the circumferential direction on the abutment fixing seat; an upper blocking block for limiting the upward sliding stroke of the movable abutment seat is connected to one end of the vertical through rod away from the abutment fixing seat; a plurality of lower blocking blocks for limiting the downward resetting sliding stroke of the movable abutment seat are fixedly connected to the abutment fixing seat; a support cylinder is sleeved and connected to the vertical through rod; and a support spring is sleeved and connected between the vertical through rod and the abutment fixing seat and the support cylinder.

[0011] The present invention is further configured such that: a positioning laser sensor for detecting the positioning status of the output shaft is fixedly connected to the abutment fixing seat, and a detection groove is provided on the pressing cylinder.

[0012] The present invention is further configured such that: the rotary drive assembly includes a horizontal drive seat fixedly connected to the vertical press base along the horizontal direction; the tensioning and holding assembly is rotatably connected to the horizontal drive seat based on a rotation shaft; a driven drive wheel is concentrically fixedly connected to the rotation shaft; an active drive wheel is rotatably connected to the horizontal drive seat based on a drive motor; and the active drive wheel and the driven drive wheel are driven by a transmission belt.

[0013] The second objective of this invention is to provide an automatic assembly method for automotive motor output shafts, which has the advantage of ensuring assembly accuracy and efficiency while reducing equipment manufacturing costs.

[0014] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an automatic assembly method for an automotive motor output shaft, using an automatic assembly device for an automotive motor output shaft as described in the above technical solution; comprising: Step 1: First, the housing positioning assembly transports and positions the differential housing at the assembly station. At the same time, the horizontal lead screw sliding assembly drives the horizontal sliding seat to move, thereby holding and transporting the output shaft from the preparation station to directly above the differential housing. Step 2: Then, the vertical guide pressing assembly drives the expansion and holding assembly to descend to the first height, so that the lower end face of the output shaft and the upper end face of the inner tooth groove of the differential assembly form an elastic abutment. The abutment movable seat is abutted and slides upward. The upper abutment spring of the elastic abutment assembly is compressed and the lower abutment spring is stretched to store the elastic abutment force. Step 3: After the laser rangefinder senses that the distance between itself and the abutting movable seat has decreased, it controls the rotary drive assembly to work. The rotary drive assembly drives the output shaft to rotate at a low speed in the circumferential direction. When the outer tooth of the output shaft rotates to the position where it aligns with the inner tooth groove of the differential assembly, the elastic abutting assembly releases the elastic abutting force and automatically inserts the outer tooth of the output shaft into the inner tooth groove of the differential assembly to complete the initial pressing. Step 4: After the initial pressing is completed, the laser rangefinder senses that the gap between itself and the contacting movable seat has increased. The vertical guide pressing assembly continues to drive the tensioning and holding assembly and the output shaft to descend to a second height. This allows the bearing, which is concentrically sleeved and fixed on the output shaft, to be pressed into the bearing chamber of the differential assembly through the lower end face of the pressing cylinder. The pressing is completed by fully engaging the external teeth with the internal teeth of the differential assembly. Step 5: The tensioning and holding assembly releases the output shaft, the vertical guide pressing assembly drives the tensioning and holding assembly to rise and reset, and the horizontal screw sliding assembly drives the horizontal sliding seat to reset.

[0015] The present invention is further configured such that: in step 3, after the vertical guide pressing assembly drives the tensioning and holding assembly to descend to a first height, if the laser ranging sensor does not detect a reduction in the distance between itself and the abutting movable seat, the tensioning and holding assembly and the output shaft are directly driven to descend to a second height to complete the pressing process.

[0016] In summary, the present invention has the following beneficial effects: 1. This invention, by setting up an elastic abutment component, creates a constant abutment force between the external teeth of the output shaft and the internal tooth groove of the differential assembly when they are not aligned. When the output shaft rotates to the aligned position, the elastic abutment force automatically drives the external teeth of the output shaft to insert into the internal tooth groove of the differential assembly. This avoids the high cost of relying on vision sensors and high-precision angle adjustment components for pressing in the prior art. At the same time, since the elastic abutment force is constant and controllable, it prevents impact damage to the external teeth of the output shaft and the internal tooth groove of the differential assembly during the alignment pressing process, greatly reducing the manufacturing cost of the equipment. 2. By integrating the output shaft pressing process, the meshing process of the external gear and the internal gear groove, and the bearing pressing process into the same station, the elastic alignment, automatic meshing and insertion, and bearing pressing processes between the output shaft and the differential assembly can be realized sequentially through the segmented pressing of the vertical guide pressing assembly. This greatly shortens the overall cycle time, avoids the additional positioning errors introduced by multiple clamping, greatly increases assembly efficiency, and reduces the equipment footprint. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the output shaft press-fit structure in this embodiment; Figure 2 This is a schematic diagram of the overall structure of this embodiment; Figure 3 yes Figure 2 Enlarged schematic diagram of part A; Figure 4 This is a schematic diagram of the housing positioning assembly in this embodiment; Figure 5 This is a schematic diagram of the structure of the tensioning and holding assembly, the rotation drive assembly, and the elastic abutment assembly in this embodiment; Figure 6 This is a cross-sectional view of the expansion and holding assembly in this embodiment.

[0018] Reference numerals: 1. Frame; 2. Housing positioning assembly; 21. Housing conveyor line; 22. Lifting and positioning cylinder; 23. Vertical lifting seat; 24. Support tray; 25. Positioning pin; 3. Horizontal lead screw sliding assembly; 4. Horizontal sliding seat; 5. Vertical guide pressing assembly; 51. Vertical guide slide rail; 52. Vertical slider; 53. Vertical pressing seat; 54. Vertical pressing electric cylinder; 6. Tensioning and holding assembly; 61. Pressing cylinder; 62. Tensioning cylinder; 63. Tensioning sleeve; 64. Vertical telescopic cylinder; 65. Abutting compression sleeve; 66. First return spring; 67. Push-away rod; 7. Rotary drive assembly; 71. Horizontal drive seat 72. Rotating shaft; 73. Driven wheel; 74. Drive motor; 75. Driven wheel; 76. Transmission belt; 8. Elastic abutment assembly; 81. Abutment fixed seat; 82. Abutment movable seat; 83. Vertical guide rod; 84. Blocking plate; 85. Upper abutment spring; 86. Lower abutment spring; 87. Detection column; 88. Laser rangefinder sensor; 89. Vertical through rod; 810. Upper blocking block; 811. Lower blocking block; 812. Support cylinder; 813. Support spring; 814. Position laser sensor; 815. Detection groove; 9. Output shaft; 10. External gear; 11. Differential housing; 12. Internal gear groove. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Example 1: refer to Figure 1 An automatic assembly device for an automotive motor output shaft includes a frame 1. A housing positioning assembly 2 for conveying and positioning a differential housing 11 is fixedly connected to the bottom of the frame 1. A horizontal sliding seat 4 is slidably connected to the top of the frame 1 based on a horizontal lead screw sliding assembly 3. A tensioning and holding assembly 6 for holding an output shaft 9 is movably connected to the horizontal sliding seat 4 based on a vertical guide pressing assembly 5. A rotation drive assembly 7 for driving the tensioning and holding assembly 6 to rotate as a whole is fixedly connected to the tensioning and holding assembly. The upper 6 is concentrically fixedly connected to apply an elastic abutment force to the output shaft 9, so that when the outer tooth 10 of the output shaft 9 rotates to align with the inner tooth groove 12 of the differential assembly, the output shaft 9 is automatically driven to insert the elastic abutment component 8 into the inner tooth groove 12. Several output shafts 9 are positioned in the preparation position of the frame 1 to be clamped by the tensioning and holding component 6. During automatic pressing, the differential housing 11 is transported and positioned in the assembly position by the housing positioning component 2. At the same time, the horizontal sliding seat 4 is driven to move by the horizontal lead screw sliding component 3 to move the differential housing 11. The output shaft 9 is conveyed from the preparation station to directly above the differential housing 11. Then, the vertical guide pressing assembly 5 drives the output shaft 9 through two-stage pressing. In the first pressing stage, the lower end face of the output shaft 9 forms an elastic contact with the upper end face of the internal tooth groove 12 of the differential assembly. At this time, the elastic contact assembly 8 stores the elastic contact force. Subsequently, the rotation drive assembly 7 drives the output shaft 9 to rotate circumferentially at a low speed. When the outer tooth 10 of the output shaft 9 rotates to the position aligned with the internal tooth groove 12 of the differential assembly, the elastic contact assembly 8 releases its elastic force. The first stage of press-fitting is completed by automatically inserting the external tooth 10 of the output shaft 9 into the internal tooth groove 12 of the differential assembly using the abutment force. Subsequently, the output shaft 9 is driven by the vertical guide press-fitting assembly 5 to perform the second stage of press-fitting, thereby pressing the bearing into the bearing housing. This integrates the press-fitting process of the output shaft 9, the meshing process of the external tooth 10 and the internal tooth groove 12, and the bearing press-fitting process into the same station, significantly shortening the overall cycle time, avoiding additional positioning errors introduced by multiple clamping operations, greatly increasing assembly efficiency, and reducing the equipment's footprint. In this embodiment, the horizontal lead screw sliding assembly 3 uses a horizontal lead screw slide.

[0021] refer to Figure 3Specifically, the housing positioning assembly 2 includes a housing conveying line 21 fixedly connected to the bottom of the frame 1 in the horizontal direction for conveying the differential housing 11. A vertical lifting seat 23 is movably connected to the frame 1 in the vertical direction based on a lifting and positioning cylinder 22. A support tray 24 for positioning the differential housing 11 and at least two positioning pins 25 are fixedly connected to the vertical lifting seat 23. When the differential housing 11 is conveyed from the housing conveying line 21 to the pressing station, the lifting and positioning cylinder 22 drives the support tray 24 and the positioning pins 25 to lift up the differential housing 11 to position it and lift it up for subsequent pressing.

[0022] refer to Figure 1 and Figure 2 Specifically, the vertical guide pressing assembly 5 includes a vertical guide rail 51 symmetrically fixedly connected to the horizontal sliding seat 4 along the vertical direction, and a vertical pressing seat 53 slidably connected to the vertical guide rail 51 based on a vertical slider 52. The tensioning and holding assembly 6 and the rotary drive assembly 7 are both fixedly connected to the vertical pressing seat 53. A vertical pressing electric cylinder 54 that drives the vertical pressing seat 53 to rise and fall is fixedly connected to the horizontal sliding seat 4 along the vertical direction. When pressing continues, the vertical pressing electric cylinder 54 drives the vertical pressing seat 53 to descend and press along the direction of the vertical guide rail 51 to ensure the stability of the pressing process. The vertical pressing electric cylinder 54 can monitor the vertical downward pressure in real time during the pressing process to avoid damage to the output shaft 9 or the differential assembly.

[0023] refer to Figure 4 and Figure 5 Specifically, the tensioning and holding assembly 6 includes a pressure cylinder 61 fixedly connected to the vertical pressure seat 53 along the vertical direction, a tensioning cylinder 62 concentrically movably connected within the pressure cylinder 61 along the vertical direction, a tensioning sleeve 63 integrally connected to the bottom of the tensioning cylinder 62, and an abutting compression sleeve 65 movably connected between the tensioning cylinder 62 and the pressure cylinder 61 along the vertical direction based on a vertical telescopic cylinder 64. This compression sleeve 65 is used to compress the tensioning sleeve 63 to clamp and fix the output shaft 9 within the tensioning sleeve 63. Inside the tensioning cylinder 62, based on the first return spring 66, there is a push-off rod 67 that slides concentrically along the vertical direction to abut against the head of the output shaft 9, so as to push the output shaft 9 apart after press-fitting. When it is necessary to clamp the output shaft 9, the head of the output shaft 9 away from the external tooth 10 is first inserted into the tensioning sleeve 63. Then, the vertical telescopic cylinder 64 drives the abutting compression sleeve 65 to descend to abut against the tensioning sleeve 63, thereby causing the tensioning sleeve 63 to contract and thus achieve the clamping and fixing of the output shaft 9.

[0024] refer to Figure 4Specifically, the elastic abutment assembly 8 includes an abutment fixing seat 81 concentrically fixed to the bottom of the press-fitting cylinder 61, and an abutment movable seat 82 concentrically slidably connected to the top of the press-fitting cylinder 61. The tensioning cylinder 62 and the vertical telescopic cylinder 64 are both fixedly connected to the abutment movable seat 82. Several vertical guide rods 83 are circumferentially and evenly fixedly connected to the abutment fixing seat 81. The abutment movable seat 82 also has vertical guide holes that mate with the vertical guide rods 83. A blocking plate 84 is fixedly provided at the end of the vertical guide rod 83 away from the abutment fixing seat 81. An upper abutment spring 85 is sleeved and fixedly connected between the vertical guide rod 83, the blocking plate 84, and the abutment movable seat 82. A lower abutment spring 86 is sleeved and fixedly connected between the abutment movable seat 82 and the abutment fixing seat 81. A detection post 87 is fixedly provided on the abutment movable seat 82. A useful... The laser rangefinder 88, which detects the distance between the detection post 87 and the vertical guide pressing assembly 5, drives the tensioning and holding assembly 6 to descend so that the lower end face of the output shaft 9 forms an elastic abutment with the upper end face of the internal tooth groove 12 of the differential assembly. The abutment seat 82 is abutted and slides upward. The upper abutment spring 85 of the elastic abutment assembly 8 is compressed and the lower abutment spring 86 is stretched to store the elastic abutment force. At this time, the laser rangefinder 88 senses the distance between the laser rangefinder and the detection post 87. If the distance decreases, the rotation drive assembly 7 is controlled to rotate. If the laser rangefinder 88 does not sense a decrease in the distance between the laser rangefinder and the abutment seat 82, the rotation step is skipped and the tensioning and holding assembly 6 and the output shaft 9 are directly driven to descend to complete the pressing process. This ensures automatic alignment capability in non-aligned states and avoids unnecessary rotation processes, optimizing the assembly cycle. The position of the blocking plate 84 can be adjusted to control the magnitude of the elastic abutment force. A plurality of vertical through rods 89, penetrating the movable abutment seat 82, are uniformly fixedly connected along the circumference of the abutment fixed seat 81. An upper blocking block 810 is connected to the end of each vertical through rod 89 away from the abutment fixed seat 81 to limit the upward sliding stroke of the movable abutment seat 82. A plurality of lower blocking blocks 811 are fixedly connected to the abutment fixed seat 81 to limit the downward resetting sliding stroke of the movable abutment seat 82. A support cylinder 812 is sleeved and connected to the vertical through rod 89. A support spring 813 is sleeved and connected between the vertical through rod 89 and the abutment fixed seat 81 and the support cylinder 812. The upper blocking block 810 and the lower blocking block 811 prevent the upper abutment spring 85 and the lower abutment spring 86 from stretching or contracting beyond their limits, thus ensuring a constant and precise elastic abutment force. A positioning laser sensor 814 for detecting the positioning status of the output shaft 9 is also fixedly connected to the abutment fixed seat 81. A detection groove 815 is provided on the press-fit cylinder 61.

[0025] refer to Figure 4Specifically, the rotary drive assembly 7 includes a horizontal drive seat 71 fixedly connected to the vertical press base 53 along the horizontal direction, a tensioning and holding assembly 6 rotatably connected to the horizontal drive seat 71 based on a rotary shaft 72, a driven drive wheel 73 concentrically fixedly connected to the rotary shaft 72, and an active drive wheel 75 rotatably connected to the horizontal drive seat 71 based on a drive motor 74. The active drive wheel 75 and the driven drive wheel 73 are driven by a transmission belt 76. When it is necessary to drive the output shaft 9 to rotate, the drive motor 74 drives the active drive wheel 75 to rotate, and then drives the driven drive wheel 73 and the rotary shaft 72 to rotate through the transmission belt 76, ultimately realizing the overall rotation of the rotary shaft 72, the tensioning and holding assembly 6, and the elastic abutment assembly 8.

[0026] Example 2: An automatic assembly method for an automotive motor output shaft, using an automatic assembly device for an automotive motor output shaft as shown in Embodiment 1 above, includes: Step 1: First, the housing positioning assembly 2 transports and positions the differential housing 11 at the assembly station. At the same time, the horizontal lead screw sliding assembly 3 drives the horizontal sliding seat 4 to move, thereby holding and transporting the output shaft 9 from the preparation station to directly above the differential housing 11. Step 2: Then, the vertical guide pressing assembly 5 drives the tensioning and holding assembly 6 to descend to the first height, so that the lower end face of the output shaft 9 and the upper end face of the inner tooth groove 12 of the differential assembly form an elastic abutment. The abutment movable seat 82 is abutted and slides upward. The upper abutment spring 85 of the elastic abutment assembly 8 is compressed and the lower abutment spring 86 is stretched to store the elastic abutment force. Step 3: If the laser rangefinder 88 senses that the distance between itself and the abutting movable seat 82 has decreased, the rotary drive assembly 7 is controlled to work. The rotary drive assembly 7 drives the output shaft 9 to rotate at a low speed in the circumference. When the outer tooth 10 of the output shaft 9 rotates to the position where it aligns with the inner tooth groove 12 of the differential assembly, the elastic abutting assembly 8 releases the elastic abutting force and automatically inserts the outer tooth 10 of the output shaft 9 into the inner tooth groove 12 of the differential assembly to complete the initial pressing. Step 4: After the initial pressing is completed, the laser rangefinder 88 senses an increase in the distance between itself and the abutting movable seat 82. The vertical guide pressing assembly 5 continues to drive the tensioning and holding assembly 6 and the output shaft 9 to descend to a second height, so as to press the bearing concentrically sleeved and fixed on the output shaft 9 into the bearing chamber of the differential assembly through the lower end face of the pressing cylinder 61. The external tooth 10 is fully engaged with the internal tooth groove 12 of the differential assembly to complete the full pressing. If, after the vertical guide pressing assembly 5 drives the tensioning and holding assembly 6 to descend to a first height in step 3, the laser rangefinder 88 does not sense a decrease in the distance between itself and the abutting movable seat 82, the tensioning and holding assembly 6 and the output shaft 9 are directly driven to descend to a second height to complete the full pressing process. Step 5: The tensioning and holding assembly 6 releases the output shaft 9, the vertical guide pressing assembly 5 drives the tensioning and holding assembly 6 to rise and reset, and the horizontal screw sliding assembly 3 drives the horizontal sliding seat 4 to reset.

[0027] Specifically, the maximum value of the first height is the extension length of the vertical pressing electric cylinder 54 when the abutting movable seat 82 abuts against the upper blocking block 810; the maximum value of the second height is the extension length of the vertical pressing electric cylinder 54 when the bottom of the bearing coincides with the bottom of the bearing chamber.

[0028] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make inventive modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An automatic assembly device for an automotive motor output shaft, comprising a frame (1); characterized in that, The bottom of the frame (1) is fixedly connected to a housing positioning assembly (2) for conveying and positioning the differential housing (11). The top of the frame (1) is slidably connected to a horizontal sliding seat (4) in the horizontal direction based on a horizontal screw sliding assembly (3). The horizontal sliding seat (4) is movably connected to a tensioning and holding assembly (6) for holding the output shaft (9) based on a vertical guide pressing assembly (5), and a rotation drive assembly (7) for driving the tensioning and holding assembly (6) to rotate as a whole is fixedly connected. The tensioning and holding assembly (6) is concentrically fixedly connected to an elastic abutment assembly (8) for applying an elastic abutment force to the output shaft (9) so that when the outer tooth (10) of the output shaft (9) rotates to align with the inner tooth groove (12) of the differential assembly, the output shaft (9) is automatically driven to insert into the inner tooth groove (12).

2. The automatic assembly device for the output shaft of an automobile motor according to claim 1, characterized in that, The housing positioning assembly (2) includes a housing conveying line (21) fixedly connected to the bottom of the frame (1) in the horizontal direction for conveying the differential housing (11). A vertical lifting seat (23) is movably connected to the frame (1) in the vertical direction based on a lifting positioning cylinder (22). A support tray (24) for positioning the differential housing (11) and at least two positioning pins (25) are fixedly connected to the vertical lifting seat (23).

3. The automatic assembly device for the output shaft of an automobile motor according to claim 1, characterized in that, The vertical guide pressing assembly (5) includes a vertical guide slide rail (51) symmetrically fixedly connected to the horizontal sliding seat (4) along the vertical direction, and a vertical pressing seat (53) slidably connected to the vertical guide slide rail (51) based on a vertical slider (52). The tensioning and holding assembly (6) and the rotary drive assembly (7) are both fixedly connected to the vertical pressing seat (53). A vertical pressing electric cylinder (54) that drives the vertical pressing seat (53) to rise and fall is fixedly connected to the horizontal sliding seat (4) along the vertical direction.

4. The automatic assembly device for the output shaft of an automobile motor according to claim 3, characterized in that, The tensioning and holding assembly (6) includes a pressure cylinder (61) fixedly connected to the vertical pressure base (53) in the vertical direction. A tension cylinder (62) is concentrically movably connected in the vertical direction inside the pressure cylinder (61). A tension sleeve (63) is integrally connected to the bottom of the tension cylinder (62). An abutment compression sleeve (65) for compressing the tension sleeve (63) is movably connected in the vertical direction between the tension cylinder (62) and the pressure cylinder (61) based on a vertical telescopic cylinder (64) to clamp and fix the output shaft (9) in the tension sleeve (63). A push rod (67) for abutting the head of the output shaft (9) is slidably connected in the vertical direction based on a first return spring (66) inside the tension cylinder (62) to push the output shaft (9) apart after the pressure is completed.

5. The automatic assembly device for the output shaft of an automobile motor according to claim 4, characterized in that, The elastic abutment assembly (8) includes an abutment fixing seat (81) concentrically fixed to the bottom of the press-fit cylinder (61), and an abutment movable seat (82) concentrically slidably connected to the top of the press-fit cylinder (61). The expansion cylinder (62) and the vertical telescopic cylinder (64) are both fixedly connected to the abutment movable seat (82). The abutment fixing seat (81) is circumferentially and evenly fixedly connected with a plurality of vertical guide rods (83). The abutment movable seat (82) is also provided with vertical guide holes that cooperate with the vertical guide rods (83). A blocking plate (84) is fixedly provided at one end away from the abutting fixed seat (81). An upper abutting spring (85) is sleeved and fixedly connected between the vertical guide rod (83) and the abutting movable seat (82). A lower abutting spring (86) is sleeved and fixedly connected between the abutting movable seat (82) and the abutting fixed seat (81). A detection column (87) is fixedly provided on the abutting movable seat (82). A laser range sensor (88) for detecting the distance between the vertical pressing seat (53) and the detection column (87) is fixedly connected on the vertical pressing seat (53).

6. The automatic assembly device for the output shaft of an automobile motor according to claim 5, characterized in that, The abutment fixing seat (81) is also uniformly fixedly connected with a plurality of vertical through rods (89) that pass through the abutment movable seat (82) along the circumferential direction. The end of the vertical through rod (89) away from the abutment fixing seat (81) is connected to an upper blocking block (810) for limiting the upward abutment sliding stroke of the abutment movable seat (82). The abutment fixing seat (81) is fixedly connected with a plurality of lower blocking blocks (811) for limiting the downward reset sliding stroke of the abutment movable seat (82). A support cylinder (812) is sleeved and connected on the vertical through rod (89). A support spring (813) is sleeved and connected between the vertical through rod (89) and the abutment fixing seat (81) and the support cylinder (812).

7. The automatic assembly device for the output shaft of an automobile motor according to claim 6, characterized in that, The abutment fixing seat (81) is also fixedly connected to a positioning laser sensor (814) for detecting the positioning status of the output shaft (9), and the pressing cylinder (61) is provided with a detection groove (815).

8. The automatic assembly device for the output shaft of an automobile motor according to claim 3, characterized in that, The rotary drive assembly (7) includes a horizontal drive seat (71) fixedly connected to the vertical press base (53) along the horizontal direction. The tensioning and holding assembly (6) is rotatably connected to the horizontal drive seat (71) based on a rotation shaft (72). A driven drive wheel (73) is concentrically fixedly connected to the rotation shaft (72). An active drive wheel (75) is rotatably connected to the horizontal drive seat (71) based on a drive motor (74). The active drive wheel (75) and the driven drive wheel (73) are driven by a transmission belt (76).

9. An automatic assembly method for an automotive motor output shaft, using the automatic assembly device for an automotive motor output shaft as described in claim 7; characterized in that, include: Step 1: First, the housing positioning assembly (2) transports and positions the differential housing (11) at the assembly station. At the same time, the horizontal lead screw sliding assembly (3) drives the horizontal sliding seat (4) to move, thereby holding and transporting the output shaft (9) from the preparation station to directly above the differential housing (11). Step 2: Then, the vertical guide pressing assembly (5) drives the tensioning and holding assembly (6) to descend to the first height, so that the lower end face of the output shaft (9) and the upper end face of the inner tooth groove (12) of the differential assembly form an elastic abutment. The abutment movable seat (82) is abutted and slides upward. The upper abutment spring (85) of the elastic abutment assembly (8) is compressed and the lower abutment spring (86) is stretched to store the elastic abutment force. Step 3: After the laser rangefinder (88) senses the reduction in the distance between itself and the abutting movable seat (82), it controls the rotary drive assembly (7) to work. The rotary drive assembly (7) drives the output shaft (9) to rotate at a low speed in the circumference. When the outer tooth (10) of the output shaft (9) rotates to the position of being aligned with the inner tooth groove (12) of the differential assembly, the elastic abutting assembly (8) releases the elastic abutting force and automatically inserts the outer tooth (10) of the output shaft (9) into the inner tooth groove (12) of the differential assembly to complete the initial pressing. Step 4: After the initial pressing is completed, the laser range sensor (88) senses that the distance between itself and the abutting movable seat (82) has increased. The vertical guide pressing assembly (5) continues to drive the tension holding assembly (6) and the output shaft (9) to descend to a second height so that the bearing concentrically sleeved and fixed on the output shaft (9) is pressed into the bearing chamber of the differential assembly through the lower end face of the pressing cylinder (61). The complete pressing is completed by completing the full meshing of the external tooth (10) with the internal tooth groove (12) of the differential assembly. Step 5: The tensioning and holding assembly (6) releases the output shaft (9), the vertical guide pressing assembly (5) drives the tensioning and holding assembly (6) to rise and reset, and the horizontal screw sliding assembly (3) drives the horizontal sliding seat (4) to reset.

10. The automatic assembly method for an automotive motor output shaft according to claim 9, characterized in that, In step 3, after the vertical guide pressing assembly (5) drives the tensioning and holding assembly (6) to descend to the first height, if the laser range sensor (88) does not sense a reduction in the distance between itself and the abutting movable seat (82), it directly drives the tensioning and holding assembly (6) and the output shaft (9) to descend to the second height to complete the pressing process.

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