Automatic spline shaft and gear hot charging and tooth aligning device

Abstract

The utility model relates to a tooth aligning device, and provides an automatic spline shaft and gear hot charging tooth aligning device in order to solve the problems that an existing tooth aligning mode is low in assembling efficiency, high in operation risk and insufficient in tooth aligning precision. The device comprises an automatic material taking and transferring mechanism and a servo press system, wherein the servo press system comprises a mounting frame, and a spline shaft positioning mechanism and a gear press-fitting mechanism which are arranged on the mounting frame; the automatic material taking and transferring mechanism comprises a robot mounting plate, a robot with one end fixedly arranged on the robot mounting plate and a robot clamping jaw assembly arranged at the other end of the robot. The robot clamping jaw assembly comprises a gear taking clamping jaw, a gear feeding clamping jaw, a spline shaft taking clamping jaw and a spline shaft rotating clamping jaw. The spline shaft positioning mechanism comprises a bottom plate, and a positioning seat and a guide sleeve which are arranged on the bottom plate; the gear press-fitting mechanism comprises a servo electric cylinder, a connecting support connected with one end of the servo electric cylinder and a press-fitting device connected with the other end of the connecting support.

Description

Technical Field

[0001] The utility model relates to a gear alignment device, in particular to a spline shaft and gear automatic hot-fitting gear alignment device. Background Art

[0002] In the field of retarder assembly, interference fit structures between external spline shafts and internal spline holes are common. This structure requires heating the internal spline hole before aligning the gears. Due to the large number of gears that need to be aligned, high precision requirements, and difficulty in assembly, operators currently usually use manual assembly methods, that is, the operator takes the gear, heats it to the set temperature, and then grabs the gear with anti-scalding gloves and aligns it with the spline shaft to rotate and identify the gear until the spline shaft and the gear are coaxial, and the external spline of the spline shaft is aligned with the internal spline groove of the gear to ensure successful gear alignment, and finally manually press the gear into place. This gear alignment method has many human intervention links, low assembly efficiency, and it is not easy to ensure the stability and consistency of quality. In addition, the operator has high labor intensity and there is an operating risk of burns.

[0003] Chinese patent CN114012395A discloses an automatic gear alignment device for internal spline gears and external spline shafts, which solves the problem that the existing automatic gear alignment devices cannot detect and are inconvenient to press-fit. The automatic gear alignment device includes a workbench, on which a pair of horizontally movable clamping plates are provided, and the inner sides of the clamping plates opposite to each other have a plurality of positioning tooth grooves arranged in the vertical direction and used for circumferential positioning of the external spline shaft. A limit rod that always has an upward movement tendency is passed through the workbench, and the outer side wall of the limit rod has a plurality of positioning convex strips arranged in the vertical direction. The clamping plate is provided with a first pusher and a second pusher, and the first pusher is located above the second pusher in the vertical direction. The automatic gear alignment device facilitates the alignment of the internal spline gear and the external spline shaft, and can detect whether the internal spline gear and the external spline shaft are qualified.

[0004] Chinese patent CN211589149U discloses a spline shaft press-fitting device, including a first feeding assembly, a first material moving assembly, a press-fitting assembly, a second feeding assembly and a second material moving assembly; the first feeding assembly is a conveying line body; the first material moving assembly includes a first material moving cylinder, a moving profile located at the piston rod end of the first material moving cylinder and a clamping claw cylinder located on the moving profile; the press-fitting assembly includes a press-fitting table, a press-fitting support rod located below the press-fitting table and a servo electric cylinder located above the press-fitting table; the second feeding assembly includes a vibration plate and a vibration flow channel located at the outlet end of the vibration plate; the second material moving assembly includes a second material moving cylinder, a material taking cylinder located at the piston rod end of the second material moving cylinder and a material taking block located at the piston rod end of the material taking cylinder. The utility model does not require manual operation, reduces the labor intensity of workers, improves press-fitting efficiency, ensures press-fitting quality, and improves the revenue benefits of the enterprise.

[0005] Chinese patent CN211614805U discloses a clamping and pressing system for a snap ring, including a flexible pressing device, a pressed part grabbing robot, a snap ring grabbing robot and a snap ring conveying device. The flexible pressing device is set as the origin, and the snap ring conveying device, the pressed part grabbing robot and the snap ring grabbing robot are distributed around the flexible pressing device as the center, and the working ends of the pressed part grabbing robot and the snap ring grabbing robot cooperate with the flexible pressing device and the snap ring conveying device respectively. The system realizes the quick change of the snap ring assembly mechanism by integrating the snap ring assembly into the integrated flexible pressing unit outside the shell line, which can realize the mixed-line production of multiple models and the rapid replacement of wearing parts, saving equipment costs, and utilizing the high compatibility and high flexibility of the flexible pressing unit to make the snap ring assembly also have the characteristics of quick change and compatibility with multiple models at the same workstation.

[0006] However, the common shortcomings of the above-mentioned prior arts are: low gear alignment efficiency and insufficient gear alignment accuracy. Utility Model Content

[0007] The utility model aims to solve the problems of low assembly efficiency, high operation risk and insufficient gear alignment accuracy in the existing gear alignment methods, and to provide a spline shaft and gear automatic hot-fitting gear alignment device.

[0008] To achieve the above purpose, the technical solution provided by the utility model is:

[0009] A spline shaft and gear automatic shrink-fit gear alignment device, the spline shaft includes a shaft body and a bearing arranged on the shaft body, the upper end and the lower end of the spline shaft are both provided with tapered holes, and the gear is a gear with internal splines and external splines, and the special features thereof are:

[0010] It includes an automatic material taking and transfer mechanism and a servo press system, wherein the servo press system includes a mounting frame and a spline shaft positioning mechanism and a gear pressing mechanism arranged on the mounting frame; the gear pressing mechanism is located above the spline shaft positioning mechanism;

[0011] The automatic material picking and transfer mechanism includes a robot mounting plate, a robot fixed on the robot mounting plate at one end, and a robot gripper assembly arranged at the other end of the robot; the robot gripper assembly includes a gear picking gripper, a gear loading gripper, a spline shaft picking gripper, and a spline shaft rotating gripper; the spline shaft rotating gripper is used to rotate the spline shaft during press-fitting, and to transfer the gear spline shaft subassembly after press-fitting is completed;

[0012] The spline shaft positioning mechanism comprises a bottom plate arranged on the mounting frame, a positioning seat arranged on the bottom plate, wherein the center of the positioning seat is a cavity with an upper opening, and the spline shaft positioning mechanism further comprises a first tapered mandrel arranged in the cavity of the positioning seat and a guide sleeve arranged at one end of the positioning seat away from the bottom plate; the guide sleeve is used for roughly positioning the spline shaft, and the upper end of the first tapered mandrel is located at the cavity opening, and is used to cooperate with the tapered hole at the lower end of the spline shaft to center the spline shaft;

[0013] The gear press-fitting mechanism comprises a servo electric cylinder, a connecting bracket connected to the output end of the servo electric cylinder, and a press-fitting device installed on the connecting bracket;

[0014] The press-fit device comprises a press-fit mechanism and a gear clamping mechanism arranged at the lower end of the connecting bracket, and a positioning mechanism arranged inside the press-fit mechanism; the gear clamping mechanism is used to clamp the gear during positioning;

[0015] The press-fitting mechanism comprises a press head connected to the lower end of the connecting bracket, at least three first springs evenly arranged on the outside of the press head, and a positioning sleeve arranged at the lower end of the first spring and sleeved on the outside of the lower end of the press head; the positioning sleeve can move up and down relative to the press head; the press head is a hollow cylinder, and the lower end surface of the hollow cylinder is used to contact the upper end surface of the gear during press-fitting;

[0016] The positioning mechanism includes a retaining spring arranged in the hollow cylinder, a spring retaining ring connected to the retaining spring, a second spring connected to the spring retaining ring at one end, and a second conical core shaft connected to the other end of the second spring. The lower end of the second conical core shaft is used to cooperate with the tapered hole at the upper end of the spline shaft to radially position the gear to ensure that the spline shaft and the gear are coaxial.

[0017] Furthermore, the connecting bracket includes a connecting block connected to the output end of the servo electric cylinder, a supporting plate arranged on the connecting block and a transition plate arranged at the lower end of the supporting plate, and the lower end of the transition plate is respectively connected to the pressing head and the gear clamping mechanism.

[0018] Furthermore, the gear clamping mechanism includes a connecting plate arranged at the lower end of the transition plate, a cylinder arranged at the lower end of the connecting plate, two gear clamping jaws arranged at the lower end of the cylinder, and a clamping block arranged on each gear clamping jaw.

[0019] Furthermore, the gear material taking jaw, the gear material loading jaw, the spline shaft material taking jaw and the spline shaft rotating jaw are all driven by a cylinder.

[0020] Furthermore, the spline shaft rotating clamp comprises two claw hooks and friction blocks respectively arranged on the inner sides of the two claw hooks, wherein each friction block is detachably connected to the corresponding claw hook.

[0021] Furthermore, a robot control chip is provided in the robot, and a servo electric cylinder control chip is provided in the servo electric cylinder. Both the robot control chip and the servo electric cylinder control chip are electrically connected to an external controller.

[0022] Furthermore, the mounting frame is a C-frame, the base plate of the spline shaft positioning mechanism is arranged on the upper surface of the lower platform of the C-frame, a C-frame mounting plate is arranged at the bottom of the C-frame, and a plurality of reinforcing ribs are equidistantly arranged between the lower platform and the C-frame mounting plate.

[0023] Furthermore, a guide rail for limiting and moving the gear pressing mechanism is vertically arranged on the inner side wall of the mounting frame, and the connecting bracket also includes a slider vertically arranged on one end of the inner side wall of the support plate close to the mounting frame, and the slider cooperates with the guide rail.

[0024] Furthermore, an L-shaped reinforcement plate is respectively arranged on both sides of the connection block, and each L-shaped reinforcement plate is connected to the support plate and the sliding block.

[0025] Furthermore, the number of the first springs is four.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] 1. The spline shaft and gear automatic hot-fitting gear alignment device provided by the utility model is provided with a robot and a clamping claw, which does not require manual handling of the heated gear, thereby reducing the labor intensity of personnel and eliminating the hidden danger of personnel being scalded;

[0028] 2. The automatic hot-fitting gear alignment device for spline shafts and gears provided by the utility model refers to the principle of manual gear alignment, and adopts two conical mandrels (the first conical mandrel and the second conical mandrel) to accurately position the spline shaft and the gear in the axial and radial directions, thereby ensuring the coaxiality. The servo electric cylinder is used to accurately control the gear alignment position and height, and a floating pressure head is used to simulate manual gear pressing. The robot rotates the spline shaft to simulate manual gear rotation. Through the cooperation of the two, efficient gear alignment of the spline shaft and the gear is achieved;

[0029] 3. The utility model provides an automatic heat-fitting gear alignment device for spline shafts and gears. The automatic gear alignment device uses a servo electric cylinder to monitor the pressure and displacement of the gears in place, ensuring that the gears are pressed into place, thereby improving the stability and consistency of the assembly quality;

[0030] 4. The spline shaft and gear automatic hot-fitting gear alignment device provided by the utility model is provided with four jaws with different functions: a gear picking jaw, a gear loading jaw, a spline shaft picking jaw and a spline shaft rotating jaw, wherein the friction block of the spline shaft rotating jaw can be replaced, thereby improving the overall working efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of an embodiment of the spline shaft and gear automatic shrink-fit gear alignment device of the utility model;

[0032] Figure 2 It is a schematic diagram of the structure of the robot gripper in the embodiment of the spline shaft and gear automatic shrink-fit gear alignment device of the utility model;

[0033] Figure 3 It is a structural schematic diagram of the spline shaft positioning mechanism in the embodiment of the spline shaft and gear automatic shrink-fit gear alignment device of the utility model;

[0034] Figure 4 It is a structural schematic diagram of the gear press-fitting mechanism in the embodiment of the spline shaft and gear automatic shrink-fit gear alignment device of the utility model;

[0035] Figure 5 It is a cross-sectional view of the gear press-fitting mechanism in the embodiment of the spline shaft and gear automatic shrink-fit gear alignment device of the utility model;

[0036] Figure 6 It is a schematic diagram of step 3 of the gear alignment process of the embodiment of the spline shaft and gear automatic shrink-fit gear alignment device of the utility model;

[0037] Figure 7 It is a schematic diagram of step 4 of the gear alignment process of the embodiment of the spline shaft and gear automatic shrink-fit gear alignment device of the utility model;

[0038] Figure 8 It is a schematic diagram of step 5 of the gear alignment process of the embodiment of the spline shaft and gear automatic shrink-fit gear alignment device of the utility model;

[0039] Fig. 9 It is a schematic diagram of step 6 of the gear alignment process of the embodiment of the spline shaft and gear automatic shrink-fit gear alignment device of the utility model;

[0040] Description of reference numerals:

[0041] 1-automatic material picking and transfer mechanism; 11-robot; 12-robot clamp, 13-robot mounting plate; 121-gear material picking clamp; 122-gear loading clamp; 123-spline shaft material picking clamp; 124-spline shaft rotating clamp; 1241-clamp; 1242-friction block; 2-spline shaft positioning mechanism; 21-bottom plate; 22-positioning seat; 23-first conical mandrel; 24-guide sleeve; 3-gear pressing mechanism; 31-servo electric cylinder; 32-connecting bracket; 33-pressing device ;321-connecting block;322-bracket;323-transition plate;331-pressing mechanism;332-positioning mechanism;333-gear clamping mechanism;3311-pressing head;3312-first spring;3313-positioning sleeve;3321-circlip;3322-spring retaining ring;3323-second spring;3324-second conical core shaft;3331-connecting plate;3332-cylinder;3333-gear clamping claw;3334-clamping block;41-gear, 42-bearing, 43-shaft body. DETAILED DESCRIPTION

[0042] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0043] In this embodiment, the parts to be processed are a spline shaft and a gear 41, wherein the spline shaft includes a shaft body 43 and a bearing 42 arranged on the shaft body 43, the upper and lower ends of the spline shaft are both provided with tapered holes, and the gear 41 is a gear with internal splines and external splines.

[0044] A spline shaft and gear automatic shrink fitting gear alignment device, see Figures 1 to 5 , including an automatic material taking and transfer mechanism 1 and a servo press system, the servo press system includes a mounting frame and a spline shaft positioning mechanism 2 and a gear pressing mechanism 3 arranged on the mounting frame; the gear pressing mechanism 3 is located above the spline shaft positioning mechanism 2;

[0045] The automatic material picking and transfer mechanism 1 includes a robot mounting plate 13, a robot 11 fixed at one end on the robot mounting plate 13, and a robot gripper assembly 12 arranged at the other end of the robot 11; the robot gripper assembly 12 includes a gear picking gripper 121, a gear loading gripper 122, a spline shaft picking gripper 123 and a spline shaft rotating gripper 124; the spline shaft rotating gripper 124 is used to rotate the spline shaft during press-fitting, and to transfer the gear spline shaft subassembly after press-fitting is completed;

[0046] The spline shaft positioning mechanism 2 comprises a bottom plate 21 arranged on the mounting frame, a positioning seat 22 arranged on the bottom plate 21, wherein the center of the positioning seat 22 is a cavity with an upper opening, and the spline shaft positioning mechanism 2 further comprises a first tapered mandrel 23 arranged in the cavity of the positioning seat 22 and a guide sleeve 24 arranged at one end of the positioning seat 22 away from the bottom plate 21; the guide sleeve 24 is used for roughly positioning the spline shaft, and the upper end of the first tapered mandrel 23 is located at the cavity opening, and is used to cooperate with the tapered hole at the lower end of the spline shaft to center the spline shaft;

[0047] The gear pressing mechanism 3 includes a servo electric cylinder 31, a connecting bracket 32 ​​connected to the output end of the servo electric cylinder 31, and a pressing device 33 installed on the connecting bracket 32; the connecting bracket 32 ​​includes a connecting block 321 connected to the output end of the servo electric cylinder 31, a support plate 322 arranged on the connecting block 321 and a transition plate 323 arranged at the lower end of the support plate 322, and the lower end of the transition plate 323 is respectively connected to the pressing head 3311 and the gear clamping mechanism 333.

[0048] The press-fitting device 33 includes a press-fitting mechanism 331 and a gear clamping mechanism 333 arranged at the lower end of the connecting bracket 32, and a positioning mechanism 332 arranged inside the press-fitting mechanism 331; the gear clamping mechanism 333 is used to clamp the gear during positioning; the gear clamping mechanism 333 includes a connecting plate 3331 arranged at the lower end of the transition plate 323, a cylinder 3332 arranged at the lower end of the connecting plate 3331, two gear clamps 3333 arranged at the lower end of the cylinder 3332, and a clamping block 3334 arranged on each gear clamp 3333.

[0049] The press-fitting mechanism 331 comprises a press head 3311 connected to the lower end of the connecting bracket 32, three first springs 3312 evenly arranged on the outside of the press head 3311, and a positioning sleeve 3313 arranged at the lower end of the first spring 3312 and sleeved on the outer side of the lower end of the press head 3311; the positioning sleeve 3313 can move up and down relative to the press head 3311; the press head 3311 is a hollow cylinder, and the lower end surface of the hollow cylinder is used to contact the upper end surface of the gear 41 during press-fitting;

[0050] The positioning mechanism 332 includes a retaining spring 3321 arranged in the hollow cylinder, a spring retaining ring 3322 connected to the retaining spring 3321, a second spring 3323 connected to the spring retaining ring 3322 at one end, and a second conical core shaft 3324 connected to the other end of the second spring 3323. The lower end of the second conical core shaft 3324 is used to cooperate with the tapered hole at the upper end of the spline shaft to radially position the gear 41 to ensure that the spline shaft is coaxial with the gear 41.

[0051] The gear material taking clamping jaw 121, the gear material feeding clamping jaw 122, the spline shaft material taking clamping jaw 123 and the spline shaft rotating clamping jaw 124 are all driven by cylinders.

[0052] To facilitate replacement of damaged friction blocks 1242 , the spline shaft rotating clamp 124 includes two claw hooks 1241 and friction blocks 1242 respectively arranged on the inner sides of the two claw hooks 1241 , wherein each friction block 1242 is detachably connected to the corresponding claw hook 1241 .

[0053] In this embodiment, a robot control chip is provided in the robot 11, a servo cylinder control chip is provided in the servo cylinder 31, and the external controller is a PLC chip. Both the robot control chip and the servo cylinder control chip are electrically connected to the PLC chip.

[0054] The mounting frame is a C-frame, the bottom plate 21 of the spline shaft positioning mechanism 2 is arranged on the upper surface of the lower platform of the C-frame, a C-frame mounting plate is arranged at the bottom of the C-frame, and a plurality of reinforcing ribs are arranged equidistantly between the lower platform and the C-frame mounting plate. In actual application scenarios, the shape of the mounting frame can be determined according to specific working conditions.

[0055] In order to ensure the smooth operation of the gear pressing mechanism 3, a guide rail for limiting and moving the gear pressing mechanism 3 is vertically arranged on the inner side wall of the mounting frame, and the connecting bracket 32 ​​also includes a slider vertically arranged at one end of the inner side wall of the supporting plate 322 close to the mounting frame, and the slider cooperates with the guide rail. An L-shaped reinforcing plate is respectively arranged on both sides of the connecting block 321, and each L-shaped reinforcing plate is connected to the supporting plate 322 and the slider.

[0056] For the use and working method of the above-mentioned spline shaft and gear automatic shrink-fit gear alignment device, see Figures 6 to 9 , including the following steps:

[0057] Step 1: prepare a first material box containing a plurality of spline shafts and a second material box containing a plurality of gears 41, place each material box at a preset position, and then assemble and start the spline shaft and gear automatic shrink-fit gear alignment device;

[0058] Step 2: The robot 11 controls the gear picking jaw 121 to pick up a gear 41 from the second material box, and uses the spline shaft picking jaw 123 to pick up a spline shaft from the first material box, and then places the gear 41 on the external heating table, places the spline shaft on the spline shaft positioning mechanism 2, and uses the guide sleeve 24 and the first tapered mandrel 23 to roughly position the spline shaft so that it is in a vertical state;

[0059] Step 3, the servo electric cylinder 31 first presses the inner ring of the bearing 42 onto the spline shaft. After the gear is heated to the preset temperature, the robot 11 controls the gear feeding clamp 122 to lift the gear horizontally and transport it from the heating table to the press-fitting device 33. The inner spline of the gear passes through the second tapered mandrel 3324. The second tapered mandrel 3324 radially positions the gear 41 and feeds the gear 41 to the predetermined position X to ensure that the end face of the gear 41 fits the lower end face of the positioning sleeve 3313 on the press-fitting device 33. Then the robot 11 stops working, and the gear clamping mechanism 333 clamps the gear 41 under the drive of the cylinder 3332. The gear feeding clamp 122 releases and returns to its original position.

[0060] Step 4, the servo electric cylinder 31 drives the connecting bracket 32, the press-fitting device 33 and the gear 41 to move downward, the upper and lower ends of the spline shaft are both provided with tapered holes, when the upper tapered surface of the second tapered mandrel 3324 is attached to the tapered hole at the upper end of the spline shaft, under the action of the tapered surface positioning of the first tapered mandrel 23 and the second tapered mandrel 3324, the spline shaft is precisely positioned in radial and axial directions, the tapered surface of the second tapered mandrel 3324 is coaxial with the outer cylindrical surface, the tapered surface is coaxial with the spline shaft, and the outer cylindrical surface is coaxial with the inner spline of the gear 41, thereby ensuring the coaxiality of the inner spline of the gear 41 and the outer spline of the spline shaft;

[0061] Step 5, the servo electric cylinder 31 drives the press-fitting device 33 and the gear 41 to continue to move downward, the second conical core shaft 3324 compresses the first spring 3312 and retracts upward, and when the lower end face of the gear 41 fits with the upper end face of the spline shaft, it continues to move downward to the preset position Y, ensuring that the first spring 3312 on the positioning sleeve 3313 is compressed by a certain distance, the gear 41 fits with the positioning sleeve 3313, but does not fit with the end face of the pressure head 3311, after the first spring 3312 is compressed, it transmits a certain pressure to the positioning sleeve 3313, and the positioning sleeve 3313 then transmits the pressure to the gear 41, the gear clamping mechanism 333 releases the clamping claw, the robot 11 uses the spline shaft to rotate the clamping claw 124 to clamp the spline shaft, and drives the spline shaft to slowly rotate 90 degrees counterclockwise;

[0062] Step 6: During the rotation of the spline shaft, when the outer spline of the spline shaft is aligned with the spline groove of the gear 41, the outer spline of the gear 41 enters the spline groove under the pressure of the first spring 3312, and the tooth recognition is successful. The gear 41 rotates together with the spline shaft until the rotation stops, the servo electric cylinder 31 continues to press down, the second conical core shaft 3324 continues to retract upward, the positioning sleeve 3313 shrinks upward, the pressure head 3311 fits with the gear 41, and the gear 41 is pressed until the pressure reaches the preset value and the displacement reaches the preset range, and the gear 41 is pressed into place;

[0063] Step 7. During the rotation of the spline shaft, when the outer spline of the spline shaft is not aligned with the spline groove of the gear 41 and the spline shaft rotates 90 degrees to stop, the servo electric cylinder 31 continues to press down, the positioning sleeve 3313 shrinks upward, and the pressure head 3311 presses the gear 41. When the pressure reaches the preset value and the displacement does not reach the preset range, the press machine determines that the tooth recognition fails, and the servo electric cylinder 31 drives the connecting bracket 32, the pressing device 33 and the gear 41 to move upward to the preset position Y. The gear clamping mechanism 333 clamps the gear 41 under the drive of the cylinder 3332. The servo electric cylinder 31 drives the connecting bracket, the pressing device 33 and the gear 41 to return to their original positions, and then re-execute steps 4, 5 and 6. If the secondary tooth alignment still fails, the equipment automatically alarms, and then stops using it, and manually checks the cause.

[0064] Step 8: After the gear press-fitting is completed, the servo electric cylinder 31 drives the connecting bracket 32 ​​and the press-fitting device 33 to move upward and return to their original positions;

[0065] Step nine, the robot 11 uses the spline shaft to rotate the clamping claw 124 to clamp the gear spline shaft small assembly, takes it out from the guide sleeve 24, puts it on the line body pallet positioning seat, releases the pallet, and completes the spline shaft and gear tooth alignment work.

[0066] It should be noted that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present utility model, and these modifications or substitutions should be included in the protection scope of the present utility model.

Claims

1. A spline shaft and gear automatic shrink-fit gear alignment device, the spline shaft comprises a shaft body (43) and a bearing (42) arranged on the shaft body (43), the upper end and the lower end of the spline shaft are both provided with tapered holes, and the gear (41) is a gear with internal splines and external splines, characterized in that: It comprises an automatic material taking and transfer mechanism (1) and a servo press system, wherein the servo press system comprises a mounting frame, a spline shaft positioning mechanism (2) and a gear pressing mechanism (3) arranged on the mounting frame; the gear pressing mechanism (3) is located above the spline shaft positioning mechanism (2); The automatic material picking and transfer mechanism (1) comprises a robot mounting plate (13), a robot (11) with one end fixed on the robot mounting plate (13), and a robot gripper assembly (12) arranged at the other end of the robot (11); the robot gripper assembly (12) comprises a gear picking gripper (121), a gear loading gripper (122), a spline shaft picking gripper (123), and a spline shaft rotating gripper (124); the spline shaft rotating gripper (124) is used to rotate the spline shaft during press-fitting, and to transfer the gear spline shaft subassembly after press-fitting is completed; The spline shaft positioning mechanism (2) comprises a base plate (21) arranged on a mounting frame, a positioning seat (22) arranged on the base plate (21), wherein the center of the positioning seat (22) is a cavity with an upper opening, and the spline shaft positioning mechanism (2) further comprises a first tapered core shaft (23) arranged in the cavity of the positioning seat (22) and a guide sleeve (24) arranged at an end of the positioning seat (22) away from the base plate (21); the guide sleeve (24) is used for roughly positioning the spline shaft, and the upper end of the first tapered core shaft (23) is located at the opening of the cavity and is used to cooperate with the tapered hole at the lower end of the spline shaft to center the spline shaft; The gear press-fitting mechanism (3) comprises a servo electric cylinder (31), a connecting bracket (32) connected to the output end of the servo electric cylinder (31), and a press-fitting device (33) installed on the connecting bracket (32); The press-fitting device (33) comprises a press-fitting mechanism (331) and a gear clamping mechanism (333) arranged at the lower end of the connecting bracket (32), and a positioning mechanism (332) arranged inside the press-fitting mechanism (331); the gear clamping mechanism (333) is used to clamp the gear during positioning; The press-fitting mechanism (331) comprises a press head (3311) connected to the lower end of the connecting bracket (32), at least three first springs (3312) evenly arranged on the outside of the press head (3311), and a positioning sleeve (3313) arranged at the lower end of the first spring (3312) and sleeved on the outer side of the lower end of the press head (3311); the positioning sleeve (3313) can move up and down relative to the press head (3311); the press head (3311) is a hollow cylinder, and the lower end surface of the hollow cylinder is used to contact the upper end surface of the gear during press-fitting; The positioning mechanism (332) includes a retaining spring (3321) arranged in the hollow cylinder, a spring retaining ring (3322) connected to the retaining spring (3321), a second spring (3323) connected to the spring retaining ring (3322) at one end, and a second conical core shaft (3324) connected to the other end of the second spring (3323), wherein the lower end of the second conical core shaft (3324) is used to cooperate with the conical hole at the upper end of the spline shaft to radially position the gear, so as to ensure that the spline shaft and the gear are coaxial.

2. The spline shaft and gear automatic shrink-fit gear alignment device according to claim 1, characterized in that: The connecting bracket (32) comprises a connecting block (321) connected to the output end of the servo electric cylinder (31), a supporting plate (322) arranged on the connecting block (321), and a transition plate (323) arranged at the lower end of the supporting plate (322), wherein the lower end of the transition plate (323) is respectively connected to the pressing head (3311) and the gear clamping mechanism (333).

3. The spline shaft and gear automatic shrink-fit gear alignment device according to claim 2, characterized in that: The gear clamping mechanism (333) comprises a connecting plate (3331) arranged at the lower end of the transition plate (323), a cylinder (3332) arranged at the lower end of the connecting plate (3331), two gear clamping claws (3333) arranged at the lower end of the cylinder (3332), and a clamping block (3334) arranged on each gear clamping claw (3333).

4. The spline shaft and gear automatic shrink-fit gear alignment device according to claim 3, characterized in that: The gear material taking clamping jaw (121), the gear material feeding clamping jaw (122), the spline shaft material taking clamping jaw (123) and the spline shaft rotating clamping jaw (124) are all driven by a cylinder.

5. The spline shaft and gear automatic shrink-fit gear alignment device according to claim 4, characterized in that: The spline shaft rotating clamp (124) comprises two claw hooks (1241) and friction blocks (1242) respectively arranged on the inner sides of the two claw hooks (1241), wherein each friction block (1242) is detachably connected to the corresponding claw hook (1241).

6. The spline shaft and gear automatic shrink-fit gear alignment device according to claim 1, characterized in that: The robot (11) is provided with a robot control chip, and the servo electric cylinder (31) is provided with a servo electric cylinder control chip. Both the robot control chip and the servo electric cylinder control chip are electrically connected to an external controller.

7. The spline shaft and gear automatic shrink-fit gear alignment device according to claim 5 or 6, characterized in that: The mounting frame is a C-frame, the bottom plate (21) of the spline shaft positioning mechanism (2) is arranged on the upper surface of the lower platform of the C-frame, a C-frame mounting plate is arranged at the bottom of the C-frame, and a plurality of reinforcing ribs are arranged at equal distances between the lower platform and the C-frame mounting plate.

8. The spline shaft and gear automatic shrink-fit gear alignment device according to claim 7, characterized in that: A guide rail for limiting and moving the gear pressing mechanism (3) is vertically arranged on the inner side wall of the mounting frame, and the connecting bracket (32) also includes a sliding block vertically arranged on the support plate (322) near one end of the inner side wall of the mounting frame, and the sliding block cooperates with the guide rail.

9. The spline shaft and gear automatic shrink-fit gear alignment device according to claim 2, characterized in that: An L-shaped reinforcement plate is respectively provided on both sides of the connection block (321), and each L-shaped reinforcement plate is connected to the support plate (322) and the sliding block.

10. The spline shaft and gear automatic shrink-fit gear alignment device according to claim 1, characterized in that: The number of the first springs (3312) is four.

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