An automatic assembly machine for steering gear end cover

Abstract

The present invention relates to the technical field of automated assembly equipment, and specifically to an automated assembly machine for a steering gear end cover, comprising a workbench, on which an end cover is arranged; a clamping unit is arranged above the workbench, and the clamping unit is used to install a diaphragm on the end cover, and the clamping unit comprises a vertically arranged extension rod, which can be lifted and lowered in a vertical direction, an annular sleeve is sleeved on the lower side of the extension rod, and an inflation chamber is formed between the annular sleeve and the extension rod, and a limiting assembly is arranged above the annular sleeve, when the diaphragm is taken away, the extension rod passes through the center hole of the diaphragm in a vertical direction, and after the annular sleeve completely passes through the center hole of the diaphragm, the limiting assembly contacts and limits the upper part of the diaphragm, and the inflation chamber is inflated, and the annular sleeve gradually expands and contacts the inner wall of the diaphragm, and the expanded annular sleeve limits the lower part of the diaphragm. The present invention improves the material taking efficiency and also improves the stability when transporting the diaphragm.

Description

Technical Field

[0001] The invention relates to the technical field of automated assembly equipment, in particular to an automated assembly machine for a steering gear end cover. Background Art

[0002] In the prior art, the end seals of various mechanical equipment can be achieved through end covers, and the shape and installation method of the end covers determine the different designs of the end cover automatic assembly machine. In the installation steps of the motor end cover, multiple steps are required to complete the installation of the end cover, and the degree of automation is low.

[0003] Chinese patent CN114123677B discloses an end cap assembly machine, which includes a frame, an end cap feeding and conveying mechanism for feeding and conveying end caps, a cup feeding and pressing mechanism for feeding and pressing cups into the end caps, a rubber sleeve assembly mechanism for assembling rubber sleeves into carbon brush arms, a carbon brush arm conveying mechanism for conveying carbon brush arms assembled with rubber sleeves, a carbon crystal assembly mechanism for assembling carbon crystals into carbon brush arms equipped with rubber sleeves, a carbon brush arm assembly mechanism for assembling carbon brush arms equipped with rubber sleeves and carbon crystals into end caps that have been pressed with cups, and a rivet for fixing the carbon brush arms and end caps. The machine frame is provided with a workbench for installing the above-mentioned mechanisms; the end cover feeding and conveying mechanism is horizontally arranged on the workbench, and the feeding and pressing mechanism, the carbon brush arm assembling mechanism, the rivet assembling mechanism, the protector assembling mechanism, the bending, flattening and spot welding mechanism are sequentially arranged beside the end cover feeding and conveying mechanism; the rubber sleeve assembling mechanism, the carbon brush arm conveying mechanism and the carbon crystal assembling mechanism and the carbon brush arm assembling mechanism are sequentially connected.

[0004] The above scheme can realize the one-time installation of the motor end cover, but before the end cover is installed, many small parts such as rubber rings need to be installed on the end cover. If the traditional manual installation method is used, it will be time-consuming and labor-intensive. In the existing production lines, the turntable production line is a commonly used type of production line, and the relevant small parts are installed one by one on the motor end cover by automated machinery. One of the processes is to install the diaphragm into the corresponding hole position of the motor end cover. The traditional installation method is to clamp the diaphragm with a robot and place it on the end of the ejection device, and then push the diaphragm out through the ejection device. However, the above installation method requires the use of more devices, has a high cost, occupies a large space, and the ejection device only adsorbs the diaphragm by gas suction, and there is a possibility that the diaphragm will fall off during the pushing process. Summary of the invention

[0005] In view of the above problems, an automatic assembly machine for the steering gear end cover is provided. When in use, the vibration plate transports the diaphragm to the lower part of the clamping unit, and then the clamping unit rotates to the top of the vibration plate, and the extension rod descends in the vertical direction, and the extension rod passes through the center hole on the diaphragm from top to bottom in the vertical direction. When the annular sleeve arranged on the lower side of the extension rod completely passes through the center hole of the diaphragm, the extension rod stops moving, and then the limit assembly is unfolded. The unfolded limit assembly can limit the upper part of the diaphragm, and at the same time, gas begins to be injected into the inflation cavity formed between the annular sleeve and the extension rod, and the air pressure in the inflation cavity gradually rises, and the volume of the inflation cavity gradually increases, and the annular sleeve gradually expands and contacts with the inner wall of the diaphragm. In the process of the clamping unit transporting the diaphragm from the vibration plate to the groove on the end cover, the lower part of the diaphragm is always limited by the expanded annular sleeve, which ensures that the diaphragm will not fall during transportation. Then the clamping unit clamps the diaphragm and rotates to the top of the end cover, and the diaphragm The pre-set position of the installation is placed in the groove of the end cover. The limiting component located above the diaphragm can provide pressing force for the diaphragm. Under the push of the limiting component, the diaphragm can be smoothly pressed into the groove. When the diaphragm is pressed in, the gas in the inflation chamber begins to be discharged, and the annular sleeve arranged on the periphery of the extension rod gradually shrinks. At the same time, the limiting component also begins to shrink. When the gas in the inflation chamber is completely discharged, the extension rod rises in the vertical direction, and the extension rod slides out of the center hole of the diaphragm in the groove, so that the installation of the diaphragm is completed. During the entire installation process, the clamping unit can directly install the diaphragm after clamping the diaphragm. Compared with the traditional process of taking and pushing the parts, it is more efficient. After clamping the diaphragm, the upper and lower parts of the diaphragm are synchronously limited by the limiting component and the expanded annular sleeve, which ensures the stability of the diaphragm during transportation after being clamped, and will not fall accidentally. At the same time, during installation, the limiting component located on the upper part of the diaphragm can also provide thrust to the diaphragm.

[0006] In order to solve the problems of the prior art, the present invention provides an automatic assembly machine for a steering gear end cover, comprising a workbench, on which the end cover is arranged; a clamping unit is arranged above the workbench, and the clamping unit is used to install a diaphragm on the end cover, the clamping unit comprises a vertically arranged extension rod, the extension rod can be lifted and lowered in a vertical direction, an annular sleeve is sleeved on the lower side of the extension rod, an inflation chamber is formed between the annular sleeve and the extension rod, a limiting component is arranged above the annular sleeve, when the diaphragm is taken out, the extension rod passes through the center hole of the diaphragm in a vertical direction, after the annular sleeve completely passes through the center hole of the diaphragm, the limiting component contacts and limits the upper part of the diaphragm, and the inflation chamber is inflated, the annular sleeve gradually expands and contacts the inner wall of the diaphragm, and the expanded annular sleeve limits the lower part of the diaphragm.

[0007] Preferably, a pressure sensor is provided at the bottom of the extension rod, and the pressure sensor is used to monitor the pressure. When taking materials, the extension rod contacts the vibration plate, the pressure sensor monitors the pressure value, and the inflation chamber begins to be filled with gas. When the diaphragm is placed in the groove of the end cover, the end of the extension rod contacts the end cover, the pressure sensor monitors the pressure value, and the inflation chamber begins to discharge gas.

[0008] Preferably, a through groove is vertically opened on the upper part of the extension rod along the extension direction of the extension rod, and the through groove is communicated with the inflation chamber. The limiting assembly includes a sliding rod slidably arranged in the through groove along the extension direction of the through groove. A through groove is opened on the side wall of the extension rod, and the through groove is communicated with the through groove. A limiting rod is hinged at the bottom of the through groove. The sliding rod has a highest position and a lowest position in its moving range. When the sliding rod is at the lowest position, the extension direction of the limiting rod is parallel to the radial direction of the extension rod.

[0009] Preferably, a connecting rod is hinged between the limiting rod and the sliding rod, and when the limiting rod is at the highest position, the angle between the connecting rod and the limiting rod is an obtuse angle, and when the limiting rod is at the lowest position, the angle between the connecting rod and the limiting rod is an acute angle.

[0010] Preferably, an air pump is provided at the upper part of the extension rod, the air pump is connected to the through slot, the sliding rod divides the through slot into an upper cavity and a lower cavity, the air pump is connected to the upper cavity, the upper cavity and the lower cavity are arranged from top to bottom in the vertical direction, and when the sliding rod slides from top to bottom, the air in the lower cavity is squeezed into the inflation cavity.

[0011] Preferably, a barometer is provided on the output end of the air pump, and the barometer is used to monitor the air pressure in the through groove. When the air pressure reaches the rated pressure, the air pump stops running.

[0012] Preferably, a through groove is vertically penetrated in the sliding rod, and the air resistance unit is arranged in the through groove. The air resistance unit is preset with a maximum opening pressure, and the rated pressure of the air pump is greater than the maximum opening pressure of the air resistance unit. Before the sliding rod reaches the lowest position, the pressure on the air resistance unit is always less than the maximum opening pressure. When the air pressure in the upper cavity is less than the maximum opening pressure of the air resistance unit, the air resistance unit is always in a closed state. When the air pressure in the upper cavity is greater than the maximum opening pressure, the air resistance unit opens, and the upper cavity and the lower cavity are connected.

[0013] Preferably, the air resistance unit includes a limit ring fixedly arranged on the through groove along the axis of the sliding rod, a sphere is arranged above the limit ring, there is a gap between the limit ring and the sphere, a spring is arranged in the gap along the extension direction of the through groove, and both ends of the spring are fixedly connected to the limit ring and the sphere respectively.

[0014] Preferably, an adsorption plate is fixedly provided on the sphere, and an electromagnet is fixedly provided on one end of the limiting ring provided with a spring. When the electromagnet is energized, the electromagnet can adsorb the adsorption plate.

[0015] Preferably, the annular sleeve is made of rubber material.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the present invention is provided with a clamping unit, which includes an extension rod, an annular sleeve and a limiting assembly. When in use, the vibrating disk conveys the diaphragm to the lower part of the clamping unit, and then the clamping unit rotates to the top of the vibrating disk, the extension rod descends in the vertical direction, and the extension rod passes through the center hole on the diaphragm from top to bottom in the vertical direction. When the annular sleeve arranged on the lower side of the extension rod completely passes through the center hole of the diaphragm, the extension rod stops moving, and then the limiting assembly is unfolded. The unfolded limiting assembly can limit the upper part of the diaphragm, and at the same time, gas begins to be injected into the inflation cavity formed between the annular sleeve and the extension rod, the air pressure in the inflation cavity gradually rises, the volume of the inflation cavity gradually increases, the annular sleeve gradually expands and contacts the inner wall of the diaphragm, and in the process that the clamping unit transports the diaphragm from the vibrating disk to the groove on the end cover, since the lower part of the diaphragm is always limited by the expanded annular sleeve, it is ensured that the diaphragm will not fall during transportation, and then the clamping unit clamps the diaphragm and rotates. To the top of the end cover, and place the diaphragm installation pre-set position into the groove of the end cover, the limiting component located above the diaphragm can provide pressing force for the diaphragm, and under the push of the limiting component, the diaphragm can be smoothly pressed into the groove, when the diaphragm is pressed in, the gas in the inflation chamber begins to be discharged, and the annular sleeve sleeved on the periphery of the extension rod gradually shrinks, and the limiting component also begins to shrink, when the gas in the inflation chamber is completely discharged, the extension rod rises in the vertical direction, and the extension rod slides out of the diaphragm center hole in the groove, so that the installation of the diaphragm is completed, during the entire installation process, the clamping unit can directly install the diaphragm after clamping the diaphragm, which is more efficient than the traditional process of taking and pushing the parts, and after clamping the diaphragm, the diaphragm is synchronously limited up and down by the limiting component and the expanded annular sleeve, which ensures the stability of the diaphragm during transportation after being clamped, and will not accidentally fall, and during installation, the limiting component located on the upper part of the diaphragm can also provide thrust to the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of an automatic assembly machine for steering gear end covers;

[0018] Figure 2 It is a three-dimensional schematic diagram of a diaphragm installation station of an automatic assembly machine for a steering gear end cover;

[0019] Figure 3 It is an automatic assembly machine for steering gear end cover. Figure 2 A local enlarged schematic diagram of the middle A;

[0020] Figure 4It is an automatic assembly machine for steering gear end cover. Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0021] Figure 5 It is a three-dimensional schematic diagram of a clamping unit of an automatic assembly machine for a steering gear end cover;

[0022] Figure 6 It is a side view of a clamping unit of an automatic assembly machine for steering gear end covers;

[0023] Figure 7 It is an automatic assembly machine for steering gear end cover. Figure 6 Schematic cross-sectional view at CC in the middle;

[0024] Figure 8 It is a cutaway perspective schematic diagram of an automatic assembly machine for steering gear end covers;

[0025] Fig. 9 It is an automatic assembly machine for steering gear end cover. Figure 8 A partial enlarged schematic diagram of point D in the middle;

[0026] Fig.10 The invention discloses a stereoscopic schematic diagram of an automatic assembly machine for a steering gear end cover when a limit block is not unfolded.

[0027] The numbers in the figure are: 1. workbench; 11. vibration plate; 12. camera; 2. end cover; 3. diaphragm; 4. clamping unit; 41. extension rod; 42. annular sleeve; 43. limit assembly; 431. sliding rod; 4311. through groove; 4312. sealing ring; 432. limit rod; 433. through groove; 434. through groove; 435. connecting rod; 436. air resistance unit; 4361. limit ring; 4362. spring; 4363. sphere; 4364. electromagnet; 4365. adsorption plate; 44. air pump; 5. three-dimensional sliding table mechanism. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] Reference Figure 1-Figure 5: An automatic assembly machine for a steering gear end cover, comprising a workbench 1, on which an end cover 2 is arranged; a clamping unit 4 is arranged above the workbench 1, and the clamping unit 4 is used to install a diaphragm 3 on the end cover 2, the clamping unit 4 comprises a vertically arranged extension rod 41, the extension rod 41 can be lifted and lowered in a vertical direction, an annular sleeve 42 is sleeved on the lower side of the extension rod 41, an inflation chamber is formed between the annular sleeve 42 and the extension rod 41, a limiting component 43 is arranged above the annular sleeve 42, when the diaphragm 3 is taken, the extension rod 41 passes through the center hole of the diaphragm 3 in a vertical direction, after the annular sleeve 42 completely passes through the center hole of the diaphragm 3, the limiting component 43 contacts and limits the upper part of the diaphragm 3, and the inflation chamber is inflated, the annular sleeve 42 gradually expands and contacts the inner wall of the diaphragm 3, and the expanded annular sleeve 42 limits the lower part of the diaphragm 3.

[0030] The workbench 1 is a disc-shaped structure. The end caps 2 placed on the workbench 1 are evenly arranged on the workbench 1 around the axis of the workbench 1. The number of end caps 2 placed on the workbench 1 is the same as the number of processes corresponding to the installation steps. The workstations corresponding to each process are located on one side of the workbench 1, and all the workstations are distributed around the workbench 1 around the axis of the workbench 1. In this way, after the end caps 2 are placed on the workbench 1, the devices at different workstations can install different components on the end caps 2. This part mainly focuses on the process of installing the diaphragm 3 on the end cap 2, so the specific working process of other processes will not be repeated here. A vibration disk 11 is provided on one side of the workbench 1, and the diaphragm 3 is held in the vibration disk 11. After the vibration disk 11 is started, the diaphragm 3 can be transported to one side of the clamping unit 4. The clamping unit 4 can clamp the diaphragm 3 transported out of the vibration disk 11 and place it on the end cap 2. Two diaphragms 3 need to be installed on each end cap 2, and a three-dimensional slide mechanism 5 for driving the clamping unit 4 to move in a three-dimensional space is provided on one side of the clamping unit 4. The end cover 2 is provided with a groove for placing the diaphragm 3. When the workbench 1 drives the end cover 2 to rotate to the lower part of the clamping unit 4, the clamping unit 4 needs to clamp the diaphragm 3 and place it in the groove of the end cover 2. When the clamping unit 4 clamps the diaphragm 3, there is no need for secondary transport, that is, the clamping unit 4 can directly place the diaphragm 3 into the corresponding groove after clamping the diaphragm 3. The clamping process of the clamping unit 4 is as follows: the vibrating plate 11 transports the diaphragm 3 to the lower part of the clamping unit 4, and then The clamping unit 4 rotates to the top of the vibration plate 11, and the extension rod 41 descends in the vertical direction. The extension rod 41 passes through the center hole on the diaphragm 3 from top to bottom in the vertical direction. When the annular sleeve 42 set on the lower side of the extension rod 41 completely passes through the center hole of the diaphragm 3, the extension rod 41 stops moving, and then the limit assembly 43 is unfolded. The unfolded limit assembly 43 can limit the upper part of the diaphragm 3, and at the same time, gas is injected into the inflation cavity formed between the annular sleeve 42 and the extension rod 41. The air pressure gradually rises, the volume of the inflation chamber gradually increases, the annular sleeve 42 gradually expands and contacts the inner wall of the diaphragm 3. It is worth noting that the air pressure in the inflation chamber is preset with a rated pressure. When the air pressure in the inflation chamber reaches the rated pressure, the inflation chamber stops filling with gas and starts to maintain pressure. When the air pressure in the inflation chamber reaches the rated pressure, the annular sleeve 42 expands and completely contacts the inner wall of the diaphragm 3. The expanded annular sleeve 42 can limit the lower part of the diaphragm 3, that is, the diameter of the expanded annular sleeve 42 is larger than the diameter of the center hole of the diaphragm 3. In this way, the clamping unit 4 completes the material removal work for the diaphragm 3. In the process of the clamping unit 4 transporting the diaphragm 3 from the vibrating disk 11 to the groove on the end cover 2, the lower part of the diaphragm 3 is always limited by the expanded annular sleeve 42, which ensures that the diaphragm 3 will not fall during transportation. Then the clamping unit 4 clamps the diaphragm 3 and rotates it to the top of the end cover 2, and installs the diaphragm 3 in the preset position into the groove of the end cover 2.Since the positioning of the groove on the end cover 2 is a prior art, it will not be described in detail here. In order to ensure the accuracy of positioning, a camera 12 is also provided on one side of the extension rod 41. The camera 12 has an auxiliary positioning function for the positioning of the groove on the end cover 2. At the same time, the camera 12 can also assist the extension rod 41 in clamping the diaphragm 3 from the vibration plate 11. When the diaphragm 3 is placed in the groove on the end cover 2, the limit component 43 located above the diaphragm 3 can provide a pressing force for the diaphragm 3. Under the push of the limit component 43, the diaphragm 3 can be smoothly pressed into the groove. When the diaphragm 3 is pressed in, the gas in the inflation cavity begins to be discharged, and the annular sleeve 42 sleeved on the outer periphery of the extension rod 41 gradually shrinks. At the same time, the limit component 4 3 also begins to shrink. When the gas in the inflation cavity is completely discharged, the extension rod 41 rises in the vertical direction and slides out from the center hole of the diaphragm 3 in the groove, thus completing the installation of the diaphragm 3. During the entire installation process, the clamping unit 4 can directly install the diaphragm 3 after clamping the diaphragm 3, which is more efficient than the traditional process of taking and pushing. After clamping the diaphragm 3, the upper and lower parts of the diaphragm 3 are synchronously limited by the limiting component 43 and the expanded annular sleeve 42, ensuring the stability of the diaphragm 3 during transportation after being clamped, and preventing accidental falling. At the same time, during installation, the limiting component 43 located on the upper part of the diaphragm 3 can also provide thrust to the diaphragm 3.

[0031] Reference Figure 1-Figure 10 : A pressure sensor is provided at the bottom of the extension rod 41, and the pressure sensor is used to monitor the pressure. When taking materials, the extension rod 41 contacts the vibration plate 11, the pressure sensor monitors the pressure value, and the gas starts to be filled into the inflation chamber. When the diaphragm 3 is placed in the groove of the end cover 2, when the end of the extension rod 41 contacts the end cover 2, the pressure sensor monitors the pressure value, and the gas starts to be discharged from the inflation chamber.

[0032] Reference Figure 6-Figure 9 : A through slot 433 is vertically opened on the upper part of the extension rod 41 along the extension direction of the extension rod 41, and the through slot 433 is communicated with the inflation chamber. The limiting assembly 43 includes a sliding rod 431 slidably arranged in the through slot 433 along the extension direction of the through slot 433, and an outlet slot 434 is opened on the side wall of the extension rod 41. The outlet slot 434 is communicated with the through slot 433, and a limiting rod 432 is hinged at the bottom of the outlet slot 434. The sliding rod 431 has a highest position and a lowest position in its moving stroke. When the sliding rod 431 is at the lowest position, the extension direction of the limiting rod 432 is parallel to the radial direction of the extension rod 41.

[0033] The limiting assembly 43 further includes a connecting rod 435 , both ends of which are hinged to the end of the limiting rod 432 and the side wall of the sliding rod 431 , respectively. When the sliding rod 431 slides in the vertical direction, the sliding rod 431 pushes the limiting rod 432 to rotate through the connecting rod 435 .

[0034] Reference Fig. 9 : A connecting rod 435 is hinged between the limiting rod 432 and the sliding rod 431. When the limiting rod 432 is at the highest position, the angle between the connecting rod 435 and the limiting rod 432 is an obtuse angle. When the limiting rod 432 is at the lowest position, the angle between the connecting rod 435 and the limiting rod 432 is an acute angle.

[0035] When the sliding rod 431 is in the highest position, the angle between the connecting rod 435 and the limiting rod 432 is an obtuse angle. In this way, when the sliding rod 431 moves from top to bottom in the vertical direction, the sliding rod 431 can push the limiting rod 432 through the connecting rod 435, so that the limiting rod 432 rotates, and the angle between the limiting rod 432 and the connecting rod 435 gradually changes from an obtuse angle to an acute angle. If the sliding rod 431 is in the highest position, the angle between the connecting rod 435 and the limiting rod 432 is 180 degrees, then when the sliding rod 431 is lowered, it will be impossible to lower. Setting the angle between the connecting rod 435 and the limiting rod 432 to an obtuse angle can avoid the above situation. When the sliding rod 431 is lowered in the vertical direction, the limiting rod 432 can be pushed and rotated normally by the connecting rod 435. When the limiting rod 432 rotates to When in the expanded state, that is, at this time, the extension direction of the limit rod 432 is parallel to the radial direction of the extension rod 41, and the limit rod 432 limits the upper part of the diaphragm 3. When the diaphragm 3 is installed in the groove of the end cover 2, there is resistance after the diaphragm 3 slides into the groove, that is, the diaphragm 3 cannot be completely installed into the groove without external force. After the limit rod 432 is set, the limit rod 432 can provide supporting force for the diaphragm 3, that is, when the extension rod 41 drives the diaphragm 3 to slide into the groove, the limit plate generates a pushing force on the diaphragm 3, so that the diaphragm 3 can be pushed by the limit rod 432 in the process of sliding into the groove, ensuring that the diaphragm 3 can slide smoothly into the groove, and at this time, the limit rod 432, the sliding rod 431 and the connecting rod 435 form a triangular structure, and the limit rod 432 can provide better support for the diaphragm 3 when pushing the diaphragm 3.

[0036] Reference Figure 7 : An air pump 44 is provided at the upper part of the extension rod 41, and the air pump 44 is connected with the through groove 433. The sliding rod 431 divides the through groove 433 into an upper cavity and a lower cavity. The air pump 44 is connected with the upper cavity, and the upper cavity and the lower cavity are arranged from top to bottom in the vertical direction. When the sliding rod 431 slides from top to bottom, the air in the lower cavity is squeezed into the inflation cavity.

[0037] In this way, when the limit assembly 43 begins to limit the upper part of the diaphragm 3, the sliding rod 431 descends, and the sliding rod 431 pushes the limit rod 432 to rotate through the connecting rod 435, so that the extension direction of the limit rod 432 is parallel to the radial direction of the sliding rod 431. In this way, during the rotation and expansion of the limit rod 432, the sliding rod 431 can simultaneously squeeze the air in the lower cavity into the inflation cavity, so that the annular sleeve 42 expands and contacts the inner wall of the diaphragm 3, avoiding the use of a separate line to supply air to the inflation cavity, thereby improving the efficiency of the clamping unit 4 in clamping and limiting the diaphragm 3. The ends of the sliding rod 431 close to the upper cavity and the ends close to the lower cavity are both provided with sealing rings 4312, and the sealing rings 4312 are used to ensure the air tightness of the upper cavity above the sliding rod 431.

[0038] Reference Figure 6-Figure 8 A barometer is provided on the output end of the air pump 44, and the barometer is used to monitor the air pressure in the through groove 433. When the air pressure reaches the rated pressure, the air pump 44 stops running.

[0039] After the air pump 44 injects gas into the inflation chamber, the gas in the inflation chamber continues to increase. After the annular sleeve 42 contacts the inner wall of the diaphragm 3, the air pump 44 continues to operate. The annular sleeve 42 further increases in volume as it expands, and the pressure exerted by the annular sleeve 42 on the inner wall of the diaphragm 3 continues to increase. Since the air pump 44 is connected to the upper cavity, the barometer arranged on the output end of the air pump 44 can monitor the air pressure in the upper cavity in real time. The air pressure in the upper cavity is the same as that in the lower cavity. In this way, the air pressure value of the upper cavity can directly reflect the air pressure value in the inflation chamber. When the air pressure reaches the rated pressure, the air pump 44 needs to stop inflating to avoid excessive inflation of the inflation chamber, which may cause damage to the annular sleeve 42.

[0040] Reference Figures 7 to 9 : A through groove 4311 is vertically penetrated in the sliding rod 431, and the air resistance unit 436 is arranged in the through groove 4311. The air resistance unit 436 is preset with a maximum opening pressure, and the rated pressure of the air pump 44 is greater than the maximum opening pressure of the air resistance unit 436. Before the sliding rod 431 reaches the lowest position, the pressure on the air resistance unit 436 is always less than the maximum opening pressure. When the air pressure in the upper cavity is less than the maximum opening pressure of the air resistance unit 436, the air resistance unit 436 is always in a closed state. When the air pressure in the upper cavity is greater than the maximum opening pressure, the air resistance unit 436 opens, and the upper cavity and the lower cavity are connected.

[0041] When the sliding rod 431 reaches the lowest position, the pressure on the air resistance unit 436 will reach the maximum opening pressure, which means that after the limiting rod 432 is in the full state, the limiting rod 432 limits the upper part of the diaphragm 3, the air resistance unit 436 can be opened, and the upper cavity and the lower cavity are connected through the opened air resistance unit 436. If the air resistance unit 436 is not provided, the upper cavity and the lower cavity are always in a connected state. Then, after the air pump 44 is started, the air pump 44 can only inject air into the inflation cavity, and the sliding rod 431 cannot be pushed by air pressure. In this way, the limiting component 43 cannot limit the upper part of the diaphragm 3, and After the air resistance unit 436 is set, the upper cavity and the lower cavity are separated by the air resistance unit 436. When the pressure in the upper cavity is less than the maximum opening pressure, the air resistance unit 436 is in a closed state. When the limit plate is fully unfolded, the air pump 44 continues to run, and the pressure in the upper cavity gradually increases. The pressure in the upper cavity gradually reaches the maximum opening pressure of the air resistance unit 436. Then the air resistance unit 436 opens. At this time, the preset rated pressure of the air pump 44 has not been reached. The gas in the upper cavity enters the lower cavity through the air resistance unit 436 and inflates the inflation cavity. When the inflation cavity reaches the rated pressure, the air pump 44 stops running.

[0042] Reference Figure 7 and Fig. 9 The air resistance unit 436 includes a limiting ring 4361 fixedly arranged on the through groove 4311 along the axis of the sliding rod 431, a sphere 4363 is arranged above the limiting ring 4361, and there is a gap between the limiting ring 4361 and the sphere 4363. A spring 4362 is arranged in the gap along the extension direction of the through groove 4311, and both ends of the spring 4362 are fixedly connected to the limiting ring 4361 and the sphere 4363 respectively.

[0043] Only when the air pressure in the upper cavity reaches the maximum opening pressure of the air resistance unit 436 can the ball 4363 be squeezed open by the gas in the upper cavity, and the pressure of the ball 4363 on the upper part of the through-slot 4311 is provided by the spring 4362.

[0044] Reference Figure 7 and Fig. 9 : An adsorption plate 4365 is fixedly arranged on the sphere 4363, and an electromagnet 4364 is fixedly arranged on one end of a spring 4362 provided on a limiting ring 4361. When the electromagnet 4364 is energized, the electromagnet 4364 can adsorb the adsorption plate 4365.

[0045] After the installation of the diaphragm 3 is completed, the electromagnet 4364 is started, the adsorption plate 4365 is adsorbed by the electromagnet 4364, and the adsorption plate 4365 drives the ball 4363 to approach the limit ring 4361. The spring 4362 is compressed under the squeezing of the ball 4363. At this time, the ball 4363 no longer blocks the through groove 4311. The upper cavity and the lower cavity are connected to each other. The air pump 44 begins to extract the air in the through groove 433. When the air in the inflation cavity is completely extracted by the air pump 44, the electromagnet 4364 is powered off. At this time, the air pump 44 continues to run. The air pump 44 extracts the air in the upper cavity, and the sliding rod 431 moves from the lowest position to the highest position along the extension direction of the extension rod 41, so that the limit rod 432 can shrink by itself.

[0046] Reference Figure 1-Figure 10 : The annular sleeve 42 is made of rubber material.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the scope defined by the spirit of the present invention.

Claims

1. An automatic assembly machine for a steering gear end cover, comprising a workbench (1), on which the end cover (2) is arranged; It is characterized in that A clamping unit (4) is arranged above the workbench (1). The clamping unit (4) is used to mount the diaphragm (3) on the end cover (2). The clamping unit (4) comprises a vertically arranged extension rod (41). The extension rod (41) can be raised and lowered in a vertical direction. An annular sleeve (42) is sleeved on the lower side of the extension rod (41). An inflation cavity is formed between the annular sleeve (42) and the extension rod (41). A limiting assembly (43) is arranged above the annular sleeve (42). When taking the diaphragm (3), the extension rod (41) passes through the central hole of the diaphragm (3) in a vertical direction. After the annular sleeve (42) completely passes through the central hole of the diaphragm (3), the limiting assembly (43) contacts and limits the upper part of the diaphragm (3), inflates the inflation cavity, and the annular sleeve (42) gradually expands and contacts the inner wall of the diaphragm (3). The expanded annular sleeve (42) limits the lower part of the diaphragm (3). A through slot (433) is vertically formed on the upper portion of the extension rod (41) along the extension direction of the extension rod (41), the through slot (433) and the inflation chamber are communicated with each other, the limiting assembly (43) comprises a sliding rod (431) slidably arranged in the through slot (433) along the extension direction of the through slot (433), a through slot (434) is formed on the side wall of the extension rod (41), the through slot (434) and the through slot (433) are communicated with each other, a limiting rod (432) is hingedly connected to the bottom of the through slot (434), the sliding rod (431) has a highest position and a lowest position in its moving stroke, and when the sliding rod (431) is at the lowest position, the extension direction of the limiting rod (432) is parallel to the radial direction of the extension rod (41); An air pump (44) is provided on the upper part of the extension rod (41); the air pump (44) and the through groove (433) are in communication with each other; the sliding rod (431) divides the through groove (433) into an upper cavity and a lower cavity; the air pump (44) is in communication with the upper cavity; the upper cavity and the lower cavity are arranged from top to bottom in a vertical direction; when the sliding rod (431) slides from top to bottom, the air in the lower cavity is squeezed into the inflation cavity; A through groove (4311) is vertically penetrated in the sliding rod (431), and the air resistance unit (436) is arranged in the through groove (4311). The air resistance unit (436) is preset with a maximum opening pressure, and the rated pressure of the air pump (44) is greater than the maximum opening pressure of the air resistance unit (436). Before the sliding rod (431) reaches the lowest position, the pressure on the air resistance unit (436) is always less than the maximum opening pressure. When the air pressure in the upper cavity is less than the maximum opening pressure of the air resistance unit (436), the air resistance unit (436) is always in a closed state. When the air pressure in the upper cavity is greater than the maximum opening pressure, the air resistance unit (436) is opened, and the upper cavity and the lower cavity are connected. The air resistance unit (436) comprises a limiting ring (4361) fixedly arranged on the through groove (4311) along the axis of the sliding rod (431); a sphere (4363) is arranged above the limiting ring (4361); a gap exists between the limiting ring (4361) and the sphere (4363); a spring (4362) is arranged in the gap along the extension direction of the through groove (4311); and two ends of the spring (4362) are fixedly connected to the limiting ring (4361) and the sphere (4363), respectively. An adsorption plate (4365) is fixedly arranged on the sphere (4363), and an electromagnet (4364) is fixedly arranged on one end of a spring (4362) provided on a limiting ring (4361). When the electromagnet (4364) is energized, the electromagnet (4364) can adsorb the adsorption plate (4365).

2. The automatic assembly machine for the steering gear end cover according to claim 1, characterized in that: A pressure sensor is provided at the bottom of the extension rod (41), and the pressure sensor is used to monitor the pressure. When taking materials, the extension rod (41) contacts the vibration plate (11), the pressure sensor monitors the pressure value, and gas starts to be filled into the inflation cavity. When the diaphragm (3) is placed in the groove of the end cover (2), the end of the extension rod (41) contacts the end cover (2), the pressure sensor monitors the pressure value, and gas starts to be discharged from the inflation cavity.

3. The automatic assembly machine for the steering gear end cover according to claim 1, characterized in that: A connecting rod (435) is hinged between the limiting rod (432) and the sliding rod (431); when the limiting rod (432) is at the highest position, the angle between the connecting rod (435) and the limiting rod (432) is an obtuse angle; when the limiting rod (432) is at the lowest position, the angle between the connecting rod (435) and the limiting rod (432) is an acute angle.

4. The automatic assembly machine for the steering gear end cover according to claim 1, characterized in that: A barometer is provided at the output end of the air pump (44), and is used to monitor the air pressure in the through groove (433). When the air pressure reaches the rated pressure, the air pump (44) stops running.

5. The automatic assembly machine for steering gear end cover according to claim 1, characterized in that: The annular sleeve (42) is made of rubber material.

Images