Cooperative press-fitting transmission device machine for universal joint cross shaft and bearing

Abstract

The invention provides a cooperative press-fitting transmission device for a universal joint cross shaft and a bearing, and relates to the field of universal joint cross shafts, the cooperative press-fitting transmission device comprises two main vertical plates arranged at a certain interval, the end faces of the upper and lower sides of the main vertical plates are respectively provided with a vertical upper support frame and a vertical lower support base, and the lower support base has a stable support effect; and rotary driving assemblies are fixedly mounted on the side surfaces, close to each other, of the main vertical plates on the two sides. Through the press-fitting punches which are symmetrically arranged up and down, the precise cross shaft positioning clamp and the bearing positioning block, and a closed-loop force control system composed of the pressure sensor, the signal conditioner and the main control box, the press-fitting force can be monitored in real time and dynamically adjusted, it is ensured that the press-fitting process of each bearing conforms to a preset process curve, and the press-fitting precision is improved. The consistency and reliability of press fitting are greatly improved, and quality fluctuation caused by manual operation is avoided.

Description

Technical Field

[0001] This invention relates to the field of universal joint cross shaft technology, specifically to a co-pressing and transmission device for universal joint cross shaft and bearing. Background Technology

[0002] As a core component of automotive transmission systems, the assembly precision of the universal joint's cross shaft and bearing directly affects transmission efficiency, reliability, and service life.

[0003] The step-by-step pressing of universal joint cross shafts and bearings is mostly carried out manually or with semi-automatic equipment. Relying on the operator's experience to control the pressing force and coaxiality, there are problems of low efficiency and poor consistency. Moreover, most production lines still require manual intervention in processes such as snap ring installation and grease filling, which makes it difficult to meet the requirements of high-precision and high-consistency mass production. Furthermore, the efficiency of transferring the universal joint cross shaft parts to be processed between multiple production lines is not high, resulting in low transfer efficiency of collaborative pressing, which further affects the production efficiency of universal joint cross shafts. Summary of the Invention

[0004] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a collaborative press-fitting and transmission device for universal joint cross shafts and bearings, which solves the problems of low assembly accuracy, low efficiency, and insufficient automation in existing technologies mentioned in the background section.

[0005] Technical solution To achieve the above objectives, the present invention is implemented through the following technical solution: a co-pressing and transmission device for a universal joint cross shaft and a bearing, comprising two main upright plates with a certain distance between them, wherein an upper support frame and a lower support base are respectively provided on the upper and lower end faces of the main upright plates, the lower support base serving as a stable support, and a rotary drive assembly is fixedly installed on one side of the two main upright plates close to each other. The rotary drive assemblies are rotatably mounted on one side of each other, and the drive shafts are poweredly connected to the rotary drive assemblies. A lower clamp mounting plate is installed and connected between the two rotary drive assemblies. A flip-up upper clamp cover plate is installed above the lower clamp mounting plate. The lower clamp mounting plate and the upper clamp cover plate have the same shape. A gantry frame with a crossbeam is provided between the upper support frame and the lower support base on both sides. The positions of the gantry frames on the upper and lower sides are symmetrical. A pressing module is fixedly provided on one side of the outer end face of the gantry frame. A telescopic drive screw is provided inside the pressing module. A pressing head mounting plate is fixedly provided on one side of the drive screws on both sides, which are close to each other. A pressing punch is fixedly provided on one side of the pressing head mounting plate, which is close to each other.

[0006] Preferably, the upper clamp cover plate and the lower clamp mounting plate are respectively provided with cross shaft positioning clamps, the lower clamp mounting plate and the upper clamp cover plate are provided with bearing positioning blocks on opposite sides, and the lower clamp mounting plate and the upper clamp cover plate are respectively provided with bearing positioning blocks that can be spliced ​​together on opposite sides. The cross shaft positioning clamps and the bearing positioning blocks cooperate to provide support for the universal joint cross shaft being machined.

[0007] Preferably, the cross-axis positioning fixtures on the upper and lower sides are respectively provided with two telescopic ejector pin bases. The telescopic ejector pin bases are arranged in a circular array with the drive shaft as the axis. The telescopic ejector pin base is provided with a telescopic ejector pin that can telescopically move. One end of the telescopic ejector pin moves outward and is fixedly connected to a top head.

[0008] Preferably, the lower clamp mounting plate has two electromagnetic attractors symmetrically arranged on one side, and a magnetic block is fixedly provided on one side of the upper clamp cover plate at the corresponding position of the electromagnetic attractors. The magnetic block is made of magnetic material, and a control switch is connected below the electromagnetic attractors.

[0009] Preferably, the other side of the lower clamp mounting plate is provided with two hinge supports symmetrically arranged. The hinge supports on both sides are provided with hinge grooves with outward openings. The inner wall of the hinge groove is provided with a limiting slot. The limiting slot is provided with a rotating shaft that can be raised, lowered, moved, and rotated. The outer end face of the rotating shaft and located in the hinge groove is fixedly connected to a connecting arm. One side of the connecting arm is fixedly connected to the upper clamp cover plate.

[0010] Preferably, the drive shaft has an upward-opening process clearance hole on the side near the lower fixture mounting plate.

[0011] Preferably, the pressing module is provided with a lead screw nut, the inner ring of the lead screw nut is threadedly connected to the drive lead screw, and a servo motor is provided on one side of the pressing module, the servo motor being poweredly connected to the lead screw nut.

[0012] Preferably, the drive screws on the upper and lower sides extend outward from one side and are equipped with auxiliary guide rods. Two linear bearings symmetrically arranged are installed between the auxiliary guide rods and the pressing module to achieve a stabilizing effect.

[0013] Preferably, a feeding track bracket is installed on one end face of the lower support base, and an inclined track support beam is fixed at the top of the feeding track bracket. The track support beam has an outward-facing slide rail, the top opening of which is located on one side of the lower clamp mounting plate. Two symmetrically positioned track supports are fixed at the lower end of the track support beam, and the track supports provide stable support.

[0014] Preferably, a main control box is installed on one side of the upper support frame, and the main control box is connected to the control switch and the rotary drive assembly.

[0015] Preferably, pressure sensors are installed on opposite sides of the pressing head mounting plates on opposite sides. A signal conditioner is provided on one side of the lower support base and the upper support frame. A data cable is installed between the signal conditioner and the pressure sensor. The signal conditioner is connected to the main control box via data connection. Beneficial effects

[0016] This invention provides a press-fitting and transmission device for a universal joint cross shaft and a bearing. It has the following advantages: This invention utilizes a press-fitting punch arranged symmetrically at the top and bottom, a precision cross-shaft positioning fixture and bearing positioning block, and a closed-loop force control system consisting of a pressure sensor, a signal conditioner and a main control box. This system can monitor and dynamically adjust the press-fitting force in real time, ensuring that the press-fitting process of each bearing conforms to the preset process curve. This greatly improves the consistency and reliability of press-fitting and avoids quality fluctuations caused by manual operation.

[0017] The device of this invention integrates precise positioning, multi-station collaborative pressing and automatic unloading functions. It can complete the pressing of bearings on the four journals of the cross shaft in one clamping, without the need to transfer and reposition the workpiece between different stations. It realizes a high degree of process concentration and continuous production, and completely solves the problems of low efficiency and poor transmission coordination mentioned in the background technology.

[0018] This invention employs a design where upper and lower pressing punches press simultaneously in opposite directions, allowing the forces during the pressing process to be balanced and canceled out within the workpiece. This avoids bending or uneven loading that may result from unilateral pressing, further ensuring the coaxiality of the pressing and the quality of the workpiece, while also contributing to the stability of the equipment structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a front view of the external structure of the present invention; Figure 3 This is a perspective view of the external structure of the present invention; Figure 4 This is a front view of the external structure of the present invention; Figure 5 This is a bottom view of the external structure of the present invention; Figure 6 For the present invention Figure 4 A cross-sectional view along the AA direction; Figure 7 For the present invention Figure 1Enlarged structural diagram of the upper and middle clamp cover plate component; Figure 8 For the present invention Figure 2 Enlarged structural diagram of the upper and middle clamp cover plate component.

[0020] In the diagram: 101. Main upright plate; 102. Lower support base; 103. Upper support frame; 104. Main control box; 106. Auxiliary guide rod; 107. Drive screw; 108. Linear bearing; 109. Lower pressing module; 110. Gantry frame; 111. Rotary drive assembly; 112. Drive shaft; 114. Feeding track support; 115. Slide rail; 116. Track support beam; 117. Track support; 118. Upper clamp cover plate; 119. Servo motor; 120. Signal conditioner; 121. Data cable; 22. Lower clamp mounting plate; 123. Hinge support; 124. Press head mounting plate; 125. Pressure sensor; 127. Bearing positioning block; 128. Cross shaft positioning clamp; 129. Telescopic ejector pin base; 130. Telescopic ejector pin; 131. Ejector head; 132. Lead screw nut; 133. Process clearance hole; 134. Hinge groove; 135. Limiting slot; 136. Tilting shaft; 137. Connecting arm; 138. Press punch; 139. Control switch; 140. Electromagnetic attractor; 141. Magnetic suction block. Detailed Implementation

[0021] This invention provides a co-pressing and transmission device for a universal joint cross shaft and a bearing, such as... Figure 1-8 As shown, it includes two main upright plates 101 with a certain distance between them. The upper and lower ends of the main upright plates 101 are respectively provided with an upper support frame 103 and a lower support base 102. The lower support base 102 plays a role in stabilizing the support. The two main upright plates 101 are close to each other and a rotary drive assembly 111 is fixedly installed on one side. A drive shaft 112 is provided on one side of the rotary drive assembly 111, which is close to each other. The drive shaft 112 is powered to the rotary drive assembly 111. A lower clamp mounting plate 122 is installed and connected between the two rotary drive assemblies 111. A flip-up upper clamp cover plate 118 is installed above the lower clamp mounting plate 122. The lower clamp mounting plate 122 and the upper clamp cover plate 118 have the same shape. A gantry frame 110 with a crossbeam is provided between the upper support frame 103 and the lower support base 102 on both sides. The positions of the gantry frames 110 on the upper and lower sides are symmetrical. A pressing module 109 is fixedly provided on one side of the outer end face of the gantry frame 110. A telescopic drive screw 107 is provided inside the pressing module 109. A pressing head mounting plate 124 is fixedly provided on one side of the two drive screws 107 that are close to each other. A pressing punch 138 is fixedly provided on one side of the pressing head mounting plate 124 that is close to each other.

[0022] It should be further explained that when the rotary drive assembly 111 is started, it can drive the drive shaft 112 to rotate, thereby causing the lower clamp mounting plate 122 connected on both sides to rotate by an angle.

[0023] Furthermore, the upper clamp cover plate 118 and the lower clamp mounting plate 122 are respectively provided with cross shaft positioning clamps 128. The lower clamp mounting plate 122 and the upper clamp cover plate 118 are provided with bearing positioning blocks 127 on the side away from each other. The lower clamp mounting plate 122 and the upper clamp cover plate 118 are respectively provided with bearing positioning blocks 127 that can be spliced ​​together on the side closer to each other. The cross shaft positioning clamps 128 and the bearing positioning blocks 127 cooperate to provide support for the universal joint cross shaft to be processed.

[0024] Furthermore, two telescopic ejector pin bases 129 are respectively provided in the cross-axis positioning fixtures 128 on the upper and lower sides. The telescopic ejector pin bases 129 are arranged in a circular array with the drive shaft 112 as the axis. The telescopic ejector pin bases 129 are provided with telescopic ejector pins 130 that can be telescopically moved. One end of the telescopic ejector pin 130 moves outward and is fixedly connected to the top head 131.

[0025] It is worth further explaining that when the telescopic ejector pin 130 is activated, it can drive the pneumatic rod to extend and retract, thereby driving the ejector head 131 to extend and retract, which can fix and adjust the position of the universal joint cross shaft placed in the cross shaft positioning fixture 128, thus achieving precise adjustment.

[0026] Furthermore, the lower clamp mounting plate 122 has two electromagnetic attractors 140 symmetrically positioned on one side, and a magnetic attractor 141 is fixedly provided on one side of the upper clamp cover plate 118 at the corresponding position of the electromagnetic attractor 140. The magnetic attractor 141 is made of magnetic material, and a control switch 139 is connected to the lower part of the electromagnetic attractor 140.

[0027] It is worth further explaining that when the upper clamp cover plate 118 is flipped over to the upper clamp mounting plate 122, and the magnetic suction block 141 is above the electromagnetic actuator 140, the control switch 139 controls the electromagnetic actuator 140 to start, thereby magnetically attracting the magnetic suction block 141 through electromagnetic attraction, thus achieving a stable snap-fit ​​function.

[0028] Furthermore, on the other side of the lower clamp mounting plate 122, there are two hinge supports 123 symmetrically arranged. The hinge supports 123 on both sides are provided with hinge grooves 134 with outward openings. The inner wall of the hinge groove 134 is provided with a limiting slot 135. The limiting slot 135 is provided with a rotating shaft 136 that can be lifted, moved and rotated. The outer end face of the rotating shaft 136 and located in the hinge groove 134 is fixedly connected to a connecting arm 137. One side of the connecting arm 137 is fixedly connected to the upper clamp cover plate 118.

[0029] Furthermore, the drive shaft 112 has an upward-opening process clearance hole 133 on the side near the lower fixture mounting plate 122.

[0030] It should be further explained that after the upper clamp cover plate 118 moves upward to the upper limit, it can rotate further through the engagement support of the flip shaft 136 and the limit slot 135, thereby achieving the effect of opening the cross shaft positioning clamp 128, which facilitates the insertion of the universal joint cross shaft.

[0031] Furthermore, the pressing module 109 is equipped with a lead screw nut 132, the inner ring of which is threadedly connected to the drive lead screw 107. A servo motor 119 is provided on one side of the pressing module 109, and the servo motor 119 is poweredly connected to the lead screw nut 132.

[0032] It is worth further explaining that when the servo motor 119 starts, it can drive the lead screw nut 132 to rotate through the power connection, and then connect with the drive lead screw 107 through the inner ring, thereby driving the drive lead screw 107 to move up and down, and in turn driving the press head mounting plate 124 to move up and down.

[0033] Furthermore, the drive screws 107 on the upper and lower sides extend outward from one side and are equipped with auxiliary guide rods 106. Two linear bearings 108 are installed between the auxiliary guide rods 106 and the pressing module 109 to achieve a stabilizing effect.

[0034] Furthermore, a feeding track bracket 114 is installed on one end face of the lower support base 102. An inclined track support beam 116 is fixed at the top of the feeding track bracket 114. The track support beam 116 has an outward-facing slide rail 115 inside. The top opening of the slide rail 115 is located on one side of the lower clamp mounting plate 122. Two symmetrically positioned track supports 117 are fixed at the lower end of the track support beam 116. The track supports 117 provide stable support.

[0035] Furthermore, a main control box 104 is installed on one side of the upper support frame 103, and the main control box 104 is connected to the control switch 139 and the rotary drive assembly 111.

[0036] Furthermore, pressure sensors 125 are installed on one side of the pressing head mounting plates 124 on opposite sides, and signal conditioners 120 are provided on one side of the lower support base 102 and the upper support frame 103. A data cable 121 is installed between the signal conditioner 120 and the pressure sensor 125, and the signal conditioner 120 is connected to the main control box 104 for data connection.

[0037] It should be further explained that the pressure sensor 125 monitors the pushing force of the press head mounting plate 124 in real time, outputs the signal through the data cable 121, and transmits the data to the main control box 104 after data processing by the signal conditioner 120.

[0038] The usage method of this solution is as follows: S1. The universal joint cross shaft workpiece to be press-fitted is placed in the cross shaft positioning fixture 128 of the lower fixture mounting plate 122 by the operator or robot. Then, the upper fixture cover plate 118 is flipped over. At this time, the upper fixture cover plate 118 rotating shaft 136 rotates and closes downward, so that the bearing positioning block 127 set on its upper surface and the corresponding bearing positioning block 127 on the lower fixture mounting plate 122 together form a complete bearing mounting cavity.

[0039] S2. When the upper clamp cover plate 118 is closed to the position where it is in contact with the lower clamp mounting plate 122, the magnetic block 141 is aligned with the electromagnetic actuator 140. The control switch 139 triggers the electromagnetic actuator 140 to be energized, generating electromagnetic attraction to firmly attract the magnetic block 141, thereby achieving reliable locking of the upper and lower clamps.

[0040] S3. Subsequently, the telescopic ejector pin 130 extends outward under pneumatic drive, pushing the ejector head 131 to abut against the journal of the cross shaft workpiece, thereby achieving precise positioning and clamping of the workpiece in the horizontal plane and effectively preventing skewing or displacement during the pressing process.

[0041] S4. The rotary drive assembly 111 drives the drive shaft 112 to rotate according to a preset program, thereby driving the fixture assembly, including the lower fixture mounting plate 122 and the upper fixture cover plate 118, to rotate, so that the first journal of the cross shaft to be pressed is precisely aligned with the pressing punch 138 above or below.

[0042] S5. At this time, the shaft to be pressed is placed into the two corresponding bearing positioning blocks 127. The main control box 104 controls the servo motor 119 to start, and drives the drive screws 107 on both sides and the pressing punch 138 to move towards the workpiece through the screw nut 132, so as to perform synchronous pressing operation on both sides of the bearing. During this process, the pressure sensor 125 detects the pressing force data in real time, and transmits it to the signal conditioner 120 through the data cable 121 for signal conditioning and analog-to-digital conversion, and then feeds it back to the main control box 104. The main control box 104 has a built-in force control system that can dynamically adjust the speed and torque output of the servo motor 119 to ensure that the pressing force curve meets the process requirements, guarantee the consistency of pressing quality, and the pressing work carried out on both the upper and lower sides at the same time can form a force support between them.

[0043] S6. After the bearings on the two journals are pressed in, the rotary drive assembly 111 drives the fixture assembly to rotate 90° again and repeats S5. At this time, all the bearings on the four journals are pressed in. Throughout the press-fitting process, the workpiece does not need to be re-clamped or transferred, enabling multi-station collaborative operation and significantly improving production efficiency and positioning accuracy.

[0044] S7. When the electromagnetic attractor 140 is de-energized and releases its magnetic force, the worker or robotic arm flips and opens the upper clamp cover 118. At this time, the rotary drive assembly 111 drives the lower clamp mounting plate 122 to rotate at a specific angle. Then, the telescopic ejector pin 130 below starts and pushes the universal joint that has been pressed outward to a certain distance and rotates with the clamp mounting plate 122, so that the universal joint assembly that has been pressed falls into the slide 115 and is transported to the next process via the track support beam 116. At the same time, new cross shaft workpieces to be pressed can be immediately loaded into the fixture, enabling continuous production.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A co-pressing and transmission device for a universal joint cross shaft and a bearing, comprising two main upright plates (101) spaced at a certain distance, characterized in that: The upper and lower end faces of the main upright plate (101) are respectively provided with an upper support frame (103) and a lower support base (102). The lower support base (102) plays a role in stabilizing support. The main upright plates (101) on both sides are close to each other and a rotary drive assembly (111) is fixedly installed on one side. The rotary drive assembly (111) is provided with a drive shaft (112) that rotates close to one side of each other. The drive shaft (112) is poweredly connected to the rotary drive assembly (111). A lower clamp mounting plate (122) is installed and connected between the two rotary drive assemblies (111). A flip-up upper clamp cover plate (118) is installed above the lower clamp mounting plate (122). The lower clamp mounting plate (122) and the upper clamp cover plate (118) have the same shape. A gantry frame (110) with a cross frame is provided between the upper support frame (103) and the lower support base (102) on both sides. The gantry frames (110) on the upper and lower sides are symmetrically positioned. A pressing module (109) is fixedly provided on one side of the outer end face of the gantry frame (110). A telescopic drive screw (107) is provided inside the pressing module (109). A pressing head mounting plate (124) is fixedly provided on one side of the two drive screws (107) that are close to each other. A pressing punch (138) is fixedly provided on one side of the pressing head mounting plate (124) that is close to each other.

2. The universal joint cross shaft and bearing co-pressing and transmission device according to claim 1, characterized in that: The upper clamp cover plate (118) and the lower clamp mounting plate (122) are respectively provided with cross shaft positioning clamps (128). The lower clamp mounting plate (122) and the upper clamp cover plate (118) are provided with bearing positioning blocks (127) on opposite sides. The lower clamp mounting plate (122) and the upper clamp cover plate (118) are respectively provided with bearing positioning blocks (127) that can be spliced ​​together on opposite sides.

3. The universal joint cross shaft and bearing co-pressing and transmission device according to claim 2, characterized in that: The cross-axis positioning fixture (128) on the upper and lower sides is provided with two telescopic ejector bases (129). The telescopic ejector bases (129) are arranged in a ring array with the drive shaft (112) as the axis. The telescopic ejector bases (129) are provided with telescopic ejector pins (130) that can telescopically move. One end of the telescopic ejector pin (130) moves outward and is fixedly connected to a top head (131).

4. The universal joint cross shaft and bearing co-pressing and transmission device according to claim 1, characterized in that: The lower clamp mounting plate (122) has two electromagnetic attractors (140) symmetrically arranged on one side. The upper clamp cover plate (118) has a magnetic block (141) fixed on one side and at the corresponding position of the electromagnetic attractor (140). The magnetic block (141) is made of magnetic material. A control switch (139) is connected below the electromagnetic attractor (140).

5. The universal joint cross shaft and bearing co-pressing and transmission device according to claim 1, characterized in that: The lower clamp mounting plate (122) has two hinge supports (123) symmetrically arranged on the other side. The hinge supports (123) on both sides have hinge grooves (134) with openings facing outward. The inner wall of the hinge groove (134) has a limiting slot (135). The limiting slot (135) has a rotating shaft (136) that can move up and down. The outer end face of the rotating shaft (136) and located in the hinge groove (134) is fixedly connected to a connecting arm (137). One side of the connecting arm (137) is fixedly connected to the upper clamp cover plate (118).

6. The universal joint cross shaft and bearing co-pressing and transmission device according to claim 1, characterized in that: The drive shaft (112) has an upward-opening process clearance hole (133) on the side near the lower fixture mounting plate (122).

7. The universal joint cross shaft and bearing co-pressing and transmission device according to claim 1, characterized in that: The pressing module (109) is provided with a lead screw nut (132), the inner ring of the lead screw nut (132) is threadedly connected to the drive lead screw (107), and a servo motor (119) is provided on one side of the pressing module (109), the servo motor (119) is poweredly connected to the lead screw nut (132).

8. The universal joint cross shaft and bearing co-pressing and transmission device according to claim 1, characterized in that: The drive screws (107) on the upper and lower sides extend outward from one side and are equipped with auxiliary guide rods (106). Two linear bearings (108) are installed between the auxiliary guide rods (106) and the pressing module (109) to achieve a stabilizing effect.

9. The universal joint cross shaft and bearing co-pressing and transmission device according to claim 1, characterized in that: A feeding track bracket (114) is installed on one end face of the lower support base (102). A track support beam (116) is fixed at the top of the feeding track bracket (114). A slide (115) with an outward opening is provided inside the track support beam (116). The top opening of the slide (115) is located on one side of the lower clamp mounting plate (122). Two track supports (117) with symmetrical positions are fixed at the lower end of the track support beam (116).

10. The universal joint cross shaft and bearing co-pressing and transmission device according to claim 4, characterized in that: A main control box (104) is installed on one side of the upper support frame (103). The main control box (104) is connected to the control switch (139) and the rotary drive assembly (111). Pressure sensors (125) are installed on the opposite sides of the pressing head mounting plates (124) on both sides. A signal conditioner (120) is provided on one side of the lower support base (102) and the upper support frame (103). A data cable (121) is installed between the signal conditioner (120) and the pressure sensor (125). The signal conditioner (120) is connected to the main control box (104) for data connection.

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