Automatic assembling machine for CDC shock absorber bottom valve

Abstract

The utility model discloses an automatic assembling machine for a CDC shock absorber bottom valve, which relates to the technical field of automatic assembling and comprises a bottom valve assembly circulating assembling mechanism, a screw feeding mechanism, a valve plate circulating stacking mechanism, a lower valve plate group stacking feeding mechanism, a bottom valve feeding mechanism, an upper valve plate group stacking feeding mechanism and a nut assembling mechanism. According to the circulating assembling mechanism for the bottom valve assembly, assembling stations of all parts of the bottom valve assembly are formed in a circulating mode, and automatic assembling can be sequentially carried out when the assembling stations are circulated to the corresponding stations; the position of the bottom valve assembly assembling tool can be sensed through cooperation of the position detection sensor, the optoelectronic switch and other detection elements, automatic assembling of the bottom valve assembly is efficiently achieved, and the assembling efficiency and the assembling quality are both greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic assembly, in particular to an automatic assembly machine for a CDC shock absorber bottom valve. Background Art

[0002] CDC shock absorber is an important part of automobile. During the assembly of the working cylinder, the CDC shock absorber needs to complete the assembly of the bottom valve assembly, which includes screws, lower valve plate group, bottom valve, upper valve plate group and nuts. Currently, there is no suitable automated assembly process and assembly equipment on the market that can realize the automated assembly of the bottom valve assembly with high efficiency and quality. Utility Model Content

[0003] In order to solve the technical problem of automatic assembly of CDC shock absorber bottom valve assembly, the utility model provides a CDC shock absorber bottom valve automatic assembly machine. The following technical solutions are adopted:

[0004] A CDC shock absorber bottom valve automatic assembly machine, comprising a bottom valve assembly circulation assembly mechanism, a screw feeding mechanism, a valve sheet circulation stacking mechanism, a lower valve sheet group stacking feeding mechanism, a bottom valve feeding mechanism, an upper valve sheet group stacking feeding mechanism and a nut assembly mechanism, wherein the circulation assembly mechanism comprises a circulation slide, a plurality of bottom valve assembly assembly tools and a circulation driver, wherein the plurality of bottom valve assembly tools are respectively assembled in the circulation slide, and the circulation driver drives the plurality of bottom valve assembly tools to move in a step-by-step circulation manner at the upper station of the circulation slide, the bottom valve assembly tool is provided with a screw clamping position, the screw feeding mechanism is used to grab the screws to be assembled and put them into the screw clamping position, the valve sheet circulation stacking mechanism is located on one side of the circulation assembly mechanism, and the valve sheet circulation stacking mechanism is arranged on the upper station of the circulation slide. The stacking mechanism includes a valve plate stacking circulation slide, multiple valve plate stacking tools and a stacking circulation driver. The stacking circulation driver drives the multiple valve plate stacking tools to move in a step-by-step circulation manner on the upper station of the valve plate stacking circulation slide. The lower valve plate group stacking loading mechanism is used to stack the lower valve plate group to be assembled on the valve plate circulation stacking mechanism, and grab the lower valve plate group to be assembled and place it on the nut of the screw to be assembled. The bottom valve loading mechanism is used to grab the bottom valve to be assembled and place it on the lower valve plate group to be assembled. The upper valve plate group stacking loading mechanism is used to stack the upper valve plate group to be assembled on the valve plate circulation stacking mechanism, and grab the upper valve plate group to be assembled and place it on the bottom valve to be assembled. The nut assembly mechanism is used to grab the nut to be assembled, place it on the upper valve plate group to be assembled and tighten it.

[0005] By adopting the above technical solution, the bottom valve assembly cycle assembly mechanism forms the assembly stations of the various components of the bottom valve assembly in a cycle manner, and can perform automatic assembly in sequence when circulating to the corresponding station;

[0006] With the help of position detection sensors, photoelectric switches and other detection elements, the position of the bottom valve assembly assembly tool can be sensed. When the bottom valve assembly assembly tool runs to the screw assembly position, the assembly controller controls the screw feeding mechanism to grab the screws to be assembled and put them into the screw clamping position, and the bottom valve assembly assembly tool continues to run to the lower valve plate group assembly position; the assembly controller controls the action of the lower valve plate group stacking feeding mechanism, grabs the lower valve plate group to be assembled stacked on the valve plate cycle stacking mechanism, and places it on the nut of the screw to be assembled at the valve plate group assembly position, and the bottom valve assembly tool continues to run to the bottom valve assembly position; the assembly controller controls the action of the bottom valve feeding mechanism, grabs the bottom valve to be assembled and places it on the lower valve plate group to be assembled. The valve assembly assembly tooling continues to run to the upper valve plate group assembly position; the assembly controller controls the upper valve plate group stacking feeding mechanism to grab the upper valve plate group to be assembled and place it on the bottom valve to be assembled, and the bottom valve assembly assembly tooling continues to run to the nut assembly position; the assembly controller controls the nut assembly mechanism to grab the nut to be assembled, place it on the upper valve plate group to be assembled and tighten it, and the assembly of the bottom valve assembly is completed. Different detectors can also be set at different workstations to detect whether the dimensions after assembly are qualified. If the final detection is qualified, the assembly controller controls the bottom valve assembly assembly tooling to continue to run to the output end of the bottom valve assembly, and the bottom valve assembly is removed by the transfer and transverse grabbing and placing mechanism and placed on the feed end of the output belt of the bottom valve assembly;

[0007] The automated assembly of the bottom valve assembly is efficiently realized, and both the assembly efficiency and the assembly quality are greatly improved.

[0008] Optionally, the circulation assembly mechanism also includes an assembly base plate, which is detachably mounted on the frame via a plurality of support rods, a circulation slide mounted on the upper surface of the assembly base plate, a circulation drive mounted on the bottom surface of the assembly base plate, and a driving rod of the circulation drive being connected to the bottom transmission of the bottom valve assembly tooling via a transmission member; a valve sheet stacking circulation slide mounted on the upper surface of the assembly base plate and located on one side of the circulation slide, a stacking circulation drive mounted on the bottom surface of the assembly base plate, and a driving rod of the stacking circulation drive being connected to the bottom transmission of the valve sheet stacking tooling via a transmission member.

[0009] By adopting the above technical solution, the circulation chute is suspended by a structure in which an assembly base plate is detachably mounted on the frame through multiple support rods, thereby raising the height of the circulation chute to facilitate the installation of other assembly mechanisms. The circulation drive is mainly based on different stroke cylinders. The stroke cylinder can be installed on the back of the assembly base plate, thereby realizing the step-by-step circulation movement of the valve sheet stacking tooling stations. The movement distance each time is the distance from one station to the next station.

[0010] Optionally, the screw feeding mechanism includes at least one automatic screw loader, a screw transverse movement mechanism and a screw grasping and releasing mechanism. The automatic screw loader and the screw transverse movement mechanism are respectively installed on the frame and located on one side of the assembly base plate. The screw grasping and releasing mechanism is installed on the transverse movement part of the screw transverse movement mechanism. The transverse movement part drives the screw grasping and releasing mechanism to move between the screw discharge port of the automatic screw loader and the screw assembly positions of multiple bottom valve assembly tooling. When located at the screw discharge port, the screw grasping and releasing mechanism grasps the screws to be assembled, and puts down the screws to be assembled when it moves transversely to the screw assembly position.

[0011] By adopting the above technical solution, the automatic screw loader can be a purchased standard part. The number of automatic screw loaders is set according to demand, at least one, and multiple units can meet the supply of different screws. The structure of the screw transverse movement mechanism is realized by assembling an electric slide on the bracket, which can drive the lateral movement of the screw grasping and releasing mechanism. The grasping and releasing mechanism refers to a combination of a lifting mechanism and a grasping and releasing mechanism, which can realize lifting and grasping and releasing actions. The cooperation of the screw transverse movement mechanism and the screw grasping and releasing mechanism can realize the automated action requirements of grasping, transverse movement, and then putting down the screws.

[0012] Optionally, the lower valve plate group stacking and loading mechanism includes multiple lower valve plate pushing mechanisms, a lower valve plate positioning and guiding mechanism and a lower valve plate group transverse movement and grasping mechanism. The lower valve plate pushing mechanism includes a pushing base, a pushing cylinder, a pushing connecting plate, a pushing plate and a valve plate stacking device. The pushing base is provided with a pushing plate sliding groove. The bottom of the pushing base is mounted on the assembly base plate and is located on one side of the valve plate circulation stacking mechanism and slides in the pushing plate sliding groove. The pushing cylinder is mounted on the bottom surface of the assembly base plate. The piston rod of the pushing cylinder is connected to the pushing plate through the pushing connecting plate, driving the pushing plate to slide in the pushing plate sliding groove. The valve plate stacking device includes Multiple spring columns, a guide rod assembly, a valve sheet storage rod, a valve sheet frame, a valve sheet lower pressure block and a valve sheet upper pressure block. The bottoms of the multiple spring columns are installed on the pusher base and span over the sliding groove of the pusher plate. The valve sheet lower pressure block is assembled at the bottoms of the multiple spring columns. The multiple spring columns press the valve sheet lower pressure block tightly against the upper surface of the pusher base. The bottom of the guide rod assembly is installed on the valve sheet lower pressure block. The valve sheet frame is installed in the mounting hole in the middle of the valve sheet lower pressure block. One end of the valve sheet storage rod is connected to the top of the guide rod assembly, and the other end is inserted into the valve sheet frame. The valve sheet upper pressure block is located on the valve sheet storage rod. Multiple valve sheets of the same specification are stored on the valve sheet storage rod below the valve sheet upper pressure block.

[0013] The lower valve plate positioning and guiding mechanism comprises a positioning bracket, a plurality of valve plate pressing and releasing cylinders and a plurality of pressure rods. The bottom of the positioning bracket is mounted on the assembly bottom plate and is located in the middle of the valve plate stacking circulation slide. The plurality of valve plate pressing and releasing cylinders are respectively mounted on the positioning bracket. One end of the plurality of pressure rods is respectively connected to the piston rods of the plurality of valve plate pressing and releasing cylinders. When the piston rods of the valve plate pressing and releasing cylinders are extended, the valve plate is pressed onto the valve plate stacking tooling.

[0014] The bottom of the lower valve plate group transverse movement grabbing and placing mechanism is installed on the assembly base plate, grabs the lower valve plate group to be assembled that has been stacked on the valve plate stacking tooling, and moves it transversely to the lower valve plate group assembly position of the valve plate stacking tooling, and places the lower valve plate group to be assembled on the nut of the screw to be assembled.

[0015] By adopting the above technical scheme, valve plates of the same specification are stored on the valve plate storage rod of each lower valve plate pushing mechanism. The lower valve plate group to be assembled is actually a plurality of valve plates of different specifications stacked in a set sequence. Therefore, when the pushing cylinder piston rods of the multiple lower valve plate pushing mechanisms are pushed out, the corresponding valve plates can be pushed to the upper part of the lower valve plate group assembly position of the valve plate stacking tooling. The corresponding valve plate pressing and releasing cylinder of the lower valve plate positioning and guiding mechanism moves to press the valve plate onto the positioning rod on the valve plate stacking tooling, and the valve plate stacking tooling moves cyclically. The multiple lower valve plate pushing mechanisms cooperate with the lower valve plate positioning and guiding mechanism to realize the stacking of the lower valve plate group to be assembled on the valve plate stacking tooling. Finally, the lower valve plate group transverse movement and release mechanism grabs the lower valve plate group to be assembled, and transversely moves it to the lower valve plate group assembly position of the valve plate stacking tooling, and places the lower valve plate group to be assembled on the nut of the screw to be assembled, thereby realizing the automatic stacking and assembly of the lower valve plate group to be assembled.

[0016] Optionally, the bottom valve feeding mechanism includes a bottom valve circulating conveying device and a bottom valve transverse movement grabbing and releasing mechanism, wherein the bottom valve circulating conveying device is located on one side of the bottom valve assembly circulating assembly mechanism, and the bottom of the bottom valve transverse movement grabbing and releasing mechanism is installed on the assembly bottom plate. The bottom valve to be assembled on the bottom valve circulating conveying device is grabbed and transversely moved to the bottom valve assembly position of the bottom valve assembly assembly tooling, and placed on the lower valve plate group to be assembled.

[0017] By adopting the above technical scheme, the bottom valve circulation conveying device also adopts a workstation circulation structure. The loading end can use a transfer robot to place the bottom valve to be assembled on the circulation workstation, and the unloading end uses a bottom valve transverse movement, grabbing and releasing mechanism to grab the bottom valve to be assembled, and move it transversely to the bottom valve assembly position of the bottom valve assembly tooling, and place it on the lower valve plate group to be assembled, so as to realize the automatic assembly of the bottom valve; the bottom valve transverse movement, grabbing and releasing mechanism is realized in the form of a combination of a transverse movement mechanism and a grabbing and releasing mechanism.

[0018] Optionally, the upper valve plate group stacking and loading mechanism includes multiple upper valve plate pushing mechanisms, upper valve plate positioning and guiding mechanisms and upper valve plate group transverse movement and grasping and releasing mechanisms. The upper valve plate group stacking and loading mechanism is installed on the assembly base plate, located on one side of the lower valve plate group stacking and loading mechanism. The upper valve plate pushing mechanism has the same structure as the lower valve plate pushing mechanism, and the upper valve plate positioning and guiding mechanism has the same structure as the lower valve plate positioning and guiding mechanism. The upper valve plate group transverse movement and grasping and releasing mechanism grabs the stacked upper valve plate group to be assembled, and moves it transversely to the upper valve plate group assembly position, and places the upper valve plate group to be assembled on the upper surface of the bottom valve to be assembled.

[0019] By adopting the above technical solution, the upper valve plate group stacking and feeding mechanism is actually similar in structure to the lower valve plate group stacking and feeding mechanism, except that the specifications of the valve plates pushed out by the upper valve plate pushing mechanism are different.

[0020] Optionally, it also includes a stop seat feeding mechanism, which includes a stop seat feeding machine and a stop seat transverse movement grabbing and releasing mechanism. The stop seat feeding machine is installed on a frame, and the stop seat transverse movement grabbing and releasing mechanism grabs the stop seat to be assembled of the stop seat feeding machine, and transversely moves and places it in the stop seat assembly position of the bottom valve assembly assembly tooling.

[0021] By adopting the above technical solution, different specifications of bottom valve assemblies may require a stop seat or not. The stop seat feeding mechanism is set according to the needs, and the implementation form of the stop seat feeding mechanism is also based on the feeding machine and the transverse grasping and releasing mechanism to realize automated assembly.

[0022] Optionally, the nut assembly mechanism includes a nut loader, a nut transverse movement grabbing and releasing mechanism, and a nut tightening gun, wherein the nut loader and the nut transverse movement grabbing and releasing mechanism are respectively installed on a frame, the nut transverse movement grabbing and releasing mechanism grabs the nut to be assembled at the discharge end of the nut loader, and moves it transversely to place it at the nut assembly position of the bottom valve assembly assembly tooling, and the nut tightening gun tightens the nut to be assembled on the screw to be assembled. After tightening, the screw to be assembled, the lower valve plate group to be assembled, the bottom valve to be assembled, the upper valve plate group to be assembled, the stop seat to be assembled and the nut to be assembled form a bottom valve assembly.

[0023] By adopting the above technical solution, the nut assembly mechanism is the last step of the automated assembly. The assembly logic is also loading, grabbing, lateral movement and placement. Finally, the automated assembly and locking are realized based on the nut tightening gun. After locking, the automated assembly of the bottom valve assembly is completed.

[0024] Optionally, it also includes a quality inspection system, which includes multiple workstation position sensors, a screw assembly height detector, a lower valve plate assembly height detector, a bottom valve assembly height detector, an upper valve plate assembly height detector, an assembly height detector after nut locking, and an upper valve plate assembly flatness detector after nut locking. The workstation position sensor is used to sense the positions of multiple bottom valve assembly assembly tooling, and calibrate the positions of multiple bottom valve assembly assembly tooling as screw assembly position, screw detection position, lower valve plate assembly position, lower valve plate detection position, bottom valve assembly position, bottom valve detection position, upper valve plate assembly position, upper valve plate detection position, stop seat assembly position, nut assembly position, nut locking detection position and flatness detection position. The screw assembly height detector is located at the screw detection position. On the one hand, the lower valve plate group assembly height detector is located on the side of the lower valve plate group detection position, the bottom valve assembly height detector is located on the side of the bottom valve detection position, the upper valve plate group assembly height detector is located on the side of the upper valve plate group detection position, the assembly height detector after the nut is locked is located on the side of the nut locking detection position, the upper valve plate group flatness detector after the nut is locked is located on the side of the flatness detection position, the screw assembly height detector, the lower valve plate group assembly height detector, the bottom valve assembly height detector, the upper valve plate group assembly height detector and the assembly height detector after the nut is locked detect the assembly height based on the displacement sensor respectively, the upper valve plate group flatness detector after the nut is locked detects the flatness value based on the data difference of the three displacement sensors, and the various components of the quality inspection system are respectively communicated with the assembly controller.

[0025] By adopting the above technical solution, unqualified semi-finished products can be removed in time through inspection at each inspection station to ensure assembly quality.

[0026] A control method for a CDC shock absorber bottom valve automatic assembly machine, using a CDC shock absorber bottom valve automatic assembly machine to automatically assemble a bottom valve assembly, comprising the following steps:

[0027] Step 1, the assembly controller controls the circulation driver to drive multiple bottom valve assembly assembly tools to move in a step-by-step circulation manner at the upper station in the circulation slide, and multiple station position sensors mark the stepping positions as screw assembly position, screw detection position, lower valve plate assembly position, lower valve plate detection position, bottom valve assembly position, bottom valve detection position, upper valve plate assembly position, upper valve plate detection position, stop seat assembly position, nut assembly position, nut locking detection position and flatness detection position;

[0028] Step 2, when the bottom valve assembly assembly tool runs to the screw assembly position, the assembly controller controls the screw feeding mechanism to grab the screws to be assembled and put them into the screw clamping position, controls the circulation driver to move, and the bottom valve assembly assembly tool runs to the screw detection position. The screw assembly height detector feeds back the initial height of the screw assembly surface detected, and the bottom valve assembly tool continues to run to the lower valve assembly position;

[0029] Step 3, the assembly controller controls the action of the stacking and feeding mechanism of the lower valve plate group, grabs the lower valve plate group to be assembled stacked on the valve plate circulation stacking mechanism, and places it on the nut of the screw to be assembled at the valve plate group assembly position, controls the bottom valve assembly assembly tool to run to the lower valve plate group detection position, and the lower valve plate group assembly height detector feeds back the lower valve plate detection height. If the assembly controller judges that it is qualified based on the lower valve plate detection height and the bottom valve detection height benchmark, the bottom valve assembly assembly tool continues to run to the bottom valve assembly position;

[0030] Step 4: The assembly controller controls the bottom valve feeding mechanism to move, grabs the bottom valve to be assembled and places it on the lower valve plate group to be assembled, controls the bottom valve assembly assembly tool to run to the bottom valve detection position, and the bottom valve assembly height detector feeds back the bottom valve detection height, then the bottom valve assembly tool continues to run to the upper valve plate group assembly position;

[0031] Step 5: The assembly controller controls the stacking and feeding mechanism of the upper valve plate group to move, grabs the upper valve plate group to be assembled and places it on the bottom valve to be assembled, controls the bottom valve assembly assembly tool to run to the upper valve plate group detection position, and the upper valve plate group assembly height detector feeds back the upper valve plate detection height. The assembly controller uses the bottom valve detection height as a reference, and judges that it is qualified based on the upper valve plate detection height and the bottom valve detection height reference, and then the bottom valve assembly tool continues to run to the nut assembly position;

[0032] Step 6, the assembly controller controls the movement of the nut assembly mechanism, grabs the nut to be assembled, places it on the upper valve plate group to be assembled and tightens it, controls the bottom valve assembly assembly tooling to run to the nut locking detection position, and after the nut is locked, the assembly height detector feedbacks the detection of the nut assembly surface height, and the assembly controller is based on the nut assembly surface height after the assembly is completed and the top surface height of the screw to be assembled. The assembly controller uses the nut assembly surface height as a reference, and judges that it is qualified based on the top surface height of the screw to be assembled and the nut assembly surface height reference. Then the bottom valve assembly assembly tooling continues to run to the flatness detection position. After the nut is locked, the upper valve plate group flatness detector feedbacks that the detection is qualified, and the assembly controller controls the bottom valve assembly assembly tooling to continue to run to the output end of the bottom valve assembly, and removes the bottom valve assembly through the transfer and transverse grabbing and releasing mechanism and places it on the feed end of the bottom valve assembly output belt.

[0033] In summary, the present invention includes at least one of the following beneficial technical effects:

[0034] The utility model can provide an automatic assembly machine for the bottom valve of a CDC shock absorber. The bottom valve assembly circulation assembly mechanism adopts a circulation method to form assembly stations of various components of the bottom valve assembly, and can perform automatic assembly in sequence when circulating to the corresponding stations; with the help of position detection sensors, photoelectric switches and other detection elements, the position of the bottom valve assembly assembly tooling can be sensed, and the automatic assembly of the bottom valve assembly is efficiently realized, and the assembly efficiency and assembly quality are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a three-dimensional structural schematic diagram of a CDC shock absorber bottom valve automatic assembly machine of the utility model;

[0036] Figure 2 This is a top view structural diagram of a CDC shock absorber bottom valve automatic assembly machine of the utility model;

[0037] Figure 3 This is a schematic diagram of the arrangement of detection positions of a CDC shock absorber bottom valve automatic assembly machine of the utility model;

[0038] Figure 4 It is a three-dimensional structural diagram of the combined state of the bottom valve assembly circulation assembly mechanism and the valve sheet circulation stacking mechanism of a CDC shock absorber bottom valve automatic assembly machine of the utility model;

[0039] Figure 5 It is a top view structural diagram of the combined state of the bottom valve assembly circulation assembly mechanism and the valve sheet circulation stacking mechanism of a CDC shock absorber bottom valve automatic assembly machine of the utility model;

[0040] Figure 6 It is a three-dimensional structural schematic diagram of a lower valve plate pushing mechanism of a CDC shock absorber bottom valve automatic assembly machine of the utility model;

[0041] Figure 7 It is a side view structural diagram of the combined state of a lower valve plate pushing mechanism and a lower valve plate positioning guide mechanism of a CDC shock absorber bottom valve automatic assembly machine of the utility model;

[0042] Figure 8 It is a side view structural diagram of the combined state of the screw transverse movement mechanism and the screw grasping and releasing mechanism of a CDC shock absorber bottom valve automatic assembly machine of the utility model;

[0043] Fig. 9 It is a three-dimensional structural diagram of a lateral movement grasping and releasing mechanism of a lower valve plate group of a CDC shock absorber bottom valve automatic assembly machine of the utility model;

[0044] Fig.10 It is a three-dimensional structural schematic diagram of the combined state of a nut transverse shifting grasping and releasing mechanism and a nut tightening gun of a CDC shock absorber bottom valve automatic assembly machine of the utility model;

[0045] Fig.11 It is a three-dimensional structural schematic diagram of the bottom valve assembly of the utility model.

[0046] Explanation of the reference numerals: 11, circulation chute; 12, bottom valve assembly tooling; 13, circulation driver; 21, valve sheet stacking circulation chute; 22, valve sheet stacking tooling; 23, stacking circulation driver; 31, screw automatic feeder; 32, screw transverse movement mechanism; 33, screw grasping and releasing mechanism; 41, pusher base; 42, pusher cylinder; 43, pusher connecting plate; 44, pusher plate; 46, spring column; 47, guide rod assembly; 48, valve sheet storage rod; 49, valve sheet frame; 50, valve sheet lower pressure block; 51, valve sheet upper pressure block; 52, positioning bracket; 53, valve sheet pressure release cylinder; 54, pressure rod; 55, lower valve sheet group transverse movement grasping and releasing mechanism; 61, bottom valve circulation conveying device; 62, bottom valve transverse movement grasping and releasing mechanism; 71, upper valve sheet pushing mechanism; 72, upper Valve plate positioning and guiding mechanism; 73, upper valve plate group transverse movement, grasping and releasing mechanism; 74, stop seat loader; 75, stop seat transverse movement, grasping and releasing mechanism; 81, nut loader; 82, nut transverse movement, grasping and releasing mechanism; 83, nut tightening gun; 91, screw assembly height detector; 92, lower valve plate group assembly height detector; 93, bottom valve assembly height detector; 94, upper valve plate group assembly height detector; 95, assembly height detector after nut locking; 96, upper valve plate group flatness detector after nut locking; 101, screws to be assembled; 102, lower valve plate group to be assembled; 103, bottom valve to be assembled; 104, upper valve plate group to be assembled; 105, nuts to be assembled; 106, assembly base plate; 107, rack; 108, transfer transverse movement, grasping and releasing mechanism; 109, output belt. DETAILED DESCRIPTION

[0047] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0048] The utility model embodiment discloses an automatic assembly machine for a bottom valve of a CDC shock absorber.

[0049] Reference Figure 1 - Fig.11Embodiment 1, a CDC shock absorber bottom valve automatic assembly machine, including a bottom valve assembly circulation assembly mechanism, a screw feeding mechanism, a valve sheet circulation stacking mechanism, a lower valve sheet group stacking feeding mechanism, a bottom valve feeding mechanism, an upper valve sheet group stacking feeding mechanism and a nut assembly mechanism, the circulation assembly mechanism includes a circulation slide 11, a plurality of bottom valve assembly tooling 12 and a circulation driver 13, a plurality of bottom valve assembly tooling 12 are respectively assembled in the circulation slide 11, the circulation driver 13 drives the plurality of bottom valve assembly tooling 12 to move in a step-by-step circulation manner at the upper station of the circulation slide 11, the bottom valve assembly tooling 12 is provided with a screw clamping position, the screw feeding mechanism is used to grab the screw 101 to be assembled and put it into the screw clamping position, the valve sheet circulation stacking mechanism is located on one side of the circulation assembly mechanism, the valve sheet circulation stacking mechanism includes a valve sheet stacking A circulation slide 21, multiple valve plate stacking tools 22 and a stacking circulation driver 23, the stacking circulation driver 23 drives the multiple valve plate stacking tools 22 to move in a step-by-step circulation manner on the upper station of the valve plate stacking circulation slide 21, the lower valve plate group stacking feeding mechanism is used to stack the lower valve plate group 102 to be assembled on the valve plate circulation stacking mechanism, and grab the lower valve plate group 102 to be assembled and place it on the nut of the screw 101 to be assembled, the bottom valve feeding mechanism is used to grab the bottom valve 103 to be assembled and place it on the lower valve plate group 102 to be assembled, the upper valve plate group stacking feeding mechanism is used to stack the upper valve plate group 104 to be assembled on the valve plate circulation stacking mechanism, and grab the upper valve plate group 104 to be assembled and place it on the bottom valve 103 to be assembled, the nut assembling mechanism is used to grab the nut 105 to be assembled, place it on the upper valve plate group 104 to be assembled and tighten it.

[0050] The bottom valve assembly cycle assembly mechanism forms the assembly stations of the various components of the bottom valve assembly in a cycle manner, and can be automatically assembled in sequence when circulating to the corresponding station;

[0051] In conjunction with position detection sensors, photoelectric switches and other detection elements, the position of the bottom valve assembly assembly tool 12 can be sensed. When the bottom valve assembly assembly tool 12 runs to the screw assembly position, the assembly controller controls the screw feeding mechanism to grab the screw 101 to be assembled and put it into the screw clamping position, and the bottom valve assembly assembly tool 12 continues to run to the lower valve plate group assembly position; the assembly controller controls the action of the lower valve plate group stacking feeding mechanism, grabs the lower valve plate group 102 to be assembled stacked on the valve plate circulation stacking mechanism, and places it on the nut of the screw 101 to be assembled at the valve plate group assembly position, and the bottom valve assembly tool 12 continues to run to the bottom valve assembly position; the assembly controller controls the action of the bottom valve feeding mechanism, grabs the bottom valve 103 to be assembled and places it on the lower valve plate group 102 to be assembled The valve assembly assembly tool 12 continues to run to the upper valve plate group assembly position; the assembly controller controls the upper valve plate group stacking feeding mechanism to grab the upper valve plate group 104 to be assembled and place it on the bottom valve 103 to be assembled, and the bottom valve assembly assembly tool 12 continues to run to the nut assembly position; the assembly controller controls the nut assembly mechanism to grab the nut 105 to be assembled, place it on the upper valve plate group 104 to be assembled and tighten it, and the assembly of the bottom valve assembly is completed. Different detectors can also be set at different workstations to detect whether the dimensions after assembly are qualified. If the final detection is qualified, the assembly controller controls the bottom valve assembly assembly tool 12 to continue to run to the output end of the bottom valve assembly, and the bottom valve assembly is removed by the transfer and transverse grasping and releasing mechanism 108 and placed on the feeding end of the bottom valve assembly output belt 109;

[0052] The automated assembly of the bottom valve assembly is efficiently realized, and both the assembly efficiency and the assembly quality are greatly improved.

[0053] Embodiment 2, the circulation assembly mechanism also includes an assembly base plate 106, which is detachably mounted on a frame 107 through a plurality of support rods, the circulation slide 11 is mounted on the upper surface of the assembly base plate 106, the circulation driver 13 is mounted on the bottom surface of the assembly base plate 106, and the driving rod of the circulation driver 13 is connected to the bottom of the bottom valve assembly tooling 12 through a transmission member; the valve sheet stacking circulation slide 21 is mounted on the upper surface of the assembly base plate 106 and is located on one side of the circulation slide 11, the stacking circulation driver 23 is mounted on the bottom surface of the assembly base plate 106, and the driving rod of the stacking circulation driver 23 is connected to the bottom of the valve sheet stacking tooling 22 through a transmission member.

[0054] The circulation chute 11 is suspended by a structure in which an assembly base plate 106 is detachably mounted on a frame 107 through a plurality of support rods, thereby raising the height of the circulation chute 11 to facilitate the installation of other assembly mechanisms. The circulation drive 13 is mainly based on cylinders with different strokes. The stroke cylinders can be installed on the back of the assembly base plate 106, thereby realizing the step-by-step circulation movement of the workstations of the valve sheet stacking tooling 22, and each movement distance is the distance from one workstation to the next.

[0055] Embodiment 3, the screw feeding mechanism includes at least one automatic screw loader 31, a screw transverse movement mechanism 32 and a screw grasping and releasing mechanism 33. The automatic screw loader 31 and the screw transverse movement mechanism 32 are respectively installed on the frame 107 and are located on one side of the assembly base plate 106. The screw grasping and releasing mechanism 33 is installed on the transverse movement part of the screw transverse movement mechanism 32. The transverse movement part drives the screw grasping and releasing mechanism 33 to move between the screw discharge port of the automatic screw loader 31 and the screw assembly position of multiple bottom valve assembly tooling 12. When located at the screw discharge port, the screw grasping and releasing mechanism 33 grasps the screw 101 to be assembled, and puts down the screw 101 to be assembled when it moves transversely to the screw assembly position.

[0056] The automatic screw loader 31 can be a standard part purchased from outside. The number of automatic screw loaders 31 is set according to demand, at least one, and multiple units can meet the supply of different screws. The structure of the screw transverse movement mechanism 32 is realized by assembling an electric slide on the bracket, which can drive the lateral movement of the screw grasping and releasing mechanism 33. The grasping and releasing mechanism refers to a combination of a lifting mechanism and a grasping and releasing mechanism, which can realize lifting and grasping and releasing actions. The cooperation of the screw transverse movement mechanism 32 and the screw grasping and releasing mechanism 33 can realize the automated action requirements of grasping, transverse movement, and then putting down the screws.

[0057] Embodiment 4, the lower valve plate group stacking and loading mechanism includes multiple lower valve plate pushing mechanisms, lower valve plate positioning and guiding mechanisms and lower valve plate group transverse movement grasping and releasing mechanisms 55, the lower valve plate pushing mechanism includes a pushing base 41, a pushing cylinder 42, a pushing connecting plate 43, a pushing plate 44 and a valve plate stacking device, the pushing base 41 is provided with a pushing plate sliding groove, the bottom of the pushing base 41 is installed on the assembly base plate 106, and is located on one side of the valve plate circulation stacking mechanism, and slides in the pushing plate sliding groove, the pushing cylinder 42 is installed on the bottom surface of the assembly base plate 106, the piston rod of the pushing cylinder 42 is connected to the pushing plate 44 through the pushing connecting plate 43, driving the pushing plate 44 to slide in the pushing plate sliding groove, the valve plate stacking device includes multiple spring columns 46, guide Rod assembly 47, valve sheet storage rod 48, valve sheet frame 49, valve sheet lower pressing block 50 and valve sheet upper pressing block 51, the bottom of multiple spring columns 46 are installed on the pusher base 41 and span above the pusher plate sliding groove, the valve sheet lower pressing block 50 is assembled on the bottom of multiple spring columns 46, and multiple spring columns 46 press the valve sheet lower pressing block 50 against the upper surface of the pusher base 41, the bottom of the guide rod assembly 47 is installed on the valve sheet lower pressing block 50, the valve sheet frame 49 is installed in the mounting hole in the middle of the valve sheet lower pressing block 50, one end of the valve sheet storage rod 48 is connected to the top of the guide rod assembly 47, and the other end is inserted into the valve sheet frame 49, the valve sheet upper pressing block 51 is located on the valve sheet storage rod 48, and multiple valve sheets of the same specification are stored on the valve sheet storage rod 48 below the valve sheet upper pressing block 51;

[0058] The lower valve plate positioning and guiding mechanism comprises a positioning bracket 52, a plurality of valve plate pressing and releasing cylinders 53 and a plurality of pressing rods 54. The bottom of the positioning bracket 52 is mounted on the assembly base plate 106 and is located in the middle of the valve plate stacking circulation slide 21. The plurality of valve plate pressing and releasing cylinders 53 are respectively mounted on the positioning bracket 52. One end of the plurality of pressing rods 54 is respectively connected to the piston rods of the plurality of valve plate pressing and releasing cylinders 53. When the piston rods of the valve plate pressing and releasing cylinders 53 are extended, the valve plate is pressed and placed on the valve plate stacking tooling 22.

[0059] The bottom of the lower valve plate group transverse movement grasping and releasing mechanism 55 is installed on the assembly base plate 106, grabs the lower valve plate group 102 to be assembled that has been stacked on the valve plate stacking tooling 22, and moves it transversely to the lower valve plate group assembly position of the valve plate stacking tooling 22, and places the lower valve plate group 102 to be assembled on the nut of the screw 101 to be assembled.

[0060] The valve sheet storage rod 48 of each lower valve sheet pushing mechanism stores valve sheets of the same specification. The lower valve sheet group 102 to be assembled is actually a plurality of valve sheets of different specifications stacked in a set sequence. Therefore, when the piston rods of the pushing cylinders 42 of the plurality of lower valve sheet pushing mechanisms are pushed out, the corresponding valve sheets can be pushed to the upper part of the lower valve sheet assembly position of the valve sheet stacking fixture 22. The corresponding valve sheet pressing and releasing cylinders 53 of the lower valve sheet positioning and guiding mechanism are actuated to press the valve sheets onto the positioning rods on the valve sheet stacking fixture 22. The valve plate stacking tooling 22 moves in a circular motion, and a plurality of lower valve plate pushing mechanisms cooperate with the lower valve plate positioning and guiding mechanisms to realize the stacking of the lower valve plate group 102 to be assembled on the valve plate stacking tooling 22. Finally, the lower valve plate group transverse movement grasping and releasing mechanism 55 grasps the lower valve plate group 102 to be assembled, and transversely moves and places it in the lower valve plate group assembly position of the valve plate stacking tooling 22, and places the lower valve plate group 102 to be assembled on the nut of the screw 101 to be assembled, thereby realizing the automatic stacking and assembly of the lower valve plate group 102 to be assembled.

[0061] Embodiment 5, the bottom valve feeding mechanism includes a bottom valve circulating conveying device 61 and a bottom valve transverse movement grabbing and releasing mechanism 62, the bottom valve circulating conveying device 61 is located on one side of the bottom valve assembly circulating assembly mechanism, the bottom of the bottom valve transverse movement grabbing and releasing mechanism 62 is installed on the assembly bottom plate 106, the bottom valve 103 to be assembled on the bottom valve circulating conveying device 61 is grabbed and transversely moved to the bottom valve assembly position of the bottom valve assembly assembly tooling 12, and placed on the lower valve plate group 102 to be assembled.

[0062] The bottom valve circulation conveying device 61 also adopts a workstation circulation structure. A transfer robot can be used at the loading end to place the bottom valve 103 to be assembled on the circulation workstation. The bottom valve transverse movement, grabbing and releasing mechanism 62 is used at the unloading end to grab the bottom valve 103 to be assembled, and move it transversely to the bottom valve assembly position of the bottom valve assembly tooling 12, and place it on the lower valve plate group 102 to be assembled, so as to realize the automatic assembly of the bottom valve. The bottom valve transverse movement, grabbing and releasing mechanism 62 is realized in the form of a combination of a transverse movement mechanism and a grabbing and releasing mechanism.

[0063] In Example 6, the upper valve plate group stacking and loading mechanism includes multiple upper valve plate pushing mechanisms 71, upper valve plate positioning and guiding mechanisms 72 and upper valve plate group transverse movement and grasping and releasing mechanisms 73. The upper valve plate group stacking and loading mechanism is installed on the assembly base plate 106, and is located on one side of the lower valve plate group stacking and loading mechanism. The upper valve plate pushing mechanism 71 has the same structure as the lower valve plate pushing mechanism, and the upper valve plate positioning and guiding mechanism 72 has the same structure as the lower valve plate positioning and guiding mechanism. The upper valve plate group transverse movement and grasping and releasing mechanism 73 grabs the stacked upper valve plate group 104 to be assembled, and moves it transversely to the upper valve plate group assembly position, and places the upper valve plate group 104 to be assembled on the upper surface of the bottom valve 103 to be assembled.

[0064] The upper valve sheet stacking and feeding mechanism is actually similar in structure to the lower valve sheet stacking and feeding mechanism, except that the specifications of the valve sheets pushed out by the upper valve sheet pushing mechanism 71 are different.

[0065] Embodiment 7 also includes a stop seat feeding mechanism, which includes a stop seat feeding machine 74 and a stop seat transverse movement grabbing and releasing mechanism 75. The stop seat feeding machine 74 is installed on the frame 107. The stop seat transverse movement grabbing and releasing mechanism 75 grabs the stop seat to be assembled of the stop seat feeding machine 74, and transversely moves and places it in the stop seat assembly position of the bottom valve assembly assembly tool 12.

[0066] Different specifications of bottom valve assemblies may require a stop seat or not. The stop seat feeding mechanism is set according to the needs. The implementation form of the stop seat feeding mechanism is also based on the feeder and the transverse grasping and releasing mechanism to achieve automated assembly.

[0067] Embodiment 8, the nut assembly mechanism includes a nut loader 81, a nut transverse movement grabbing and releasing mechanism 82 and a nut tightening gun 83, the nut loader 81 and the nut transverse movement grabbing and releasing mechanism 82 are respectively installed on the frame 107, the nut transverse movement grabbing and releasing mechanism 82 grabs the nut 105 to be assembled at the discharge end of the nut loader 81, and moves it transversely to place it at the nut assembly position of the bottom valve assembly assembly tooling 12, the nut tightening gun 83 tightens the nut 105 to be assembled on the screw 101 to be assembled, and after tightening, the screw 101 to be assembled, the lower valve plate group 102 to be assembled, the bottom valve 103 to be assembled, the upper valve plate group 104 to be assembled, the stop seat to be assembled and the nut 105 to be assembled form a bottom valve assembly.

[0068] The nut assembly mechanism is the last step of the automated assembly. The assembly logic is also loading, grabbing, lateral movement and placement. Finally, the automated assembly and locking are realized based on the nut tightening gun 83. After locking, the automated assembly of the bottom valve assembly is completed.

[0069] Embodiment 9 also includes a quality inspection system, which includes multiple workstation position sensors, a screw assembly height detector 91, a lower valve plate assembly height detector 92, a bottom valve assembly height detector 93, an upper valve plate assembly height detector 94, a nut locking assembly height detector 95 and a nut locking upper valve plate assembly flatness detector 96. The workstation position sensor is used to sense the positions of multiple bottom valve assembly tooling 12, and calibrate the positions of multiple bottom valve assembly tooling 12 as screw assembly position, screw detection position, lower valve plate assembly position, lower valve plate detection position, bottom valve assembly position, bottom valve detection position, upper valve plate assembly position, upper valve plate detection position, stop seat assembly position, nut assembly position, nut locking detection position and flatness detection position. The screw assembly height detector 91 is located on one side of the screw detection position. The lower valve plate assembly height detector 92 is located on one side of the lower valve plate group detection position, the bottom valve assembly height detector 93 is located on one side of the bottom valve detection position, the upper valve plate assembly height detector 94 is located on one side of the upper valve plate group detection position, the assembly height detector 95 after the nut is locked is located on one side of the nut locking detection position, and the upper valve plate group flatness detector 96 after the nut is locked is located on one side of the flatness detection position. The screw assembly height detector 91, the lower valve plate assembly height detector 92, the bottom valve assembly height detector 93, the upper valve plate assembly height detector 94 and the assembly height detector 95 after the nut is locked detect the assembly heights based on the displacement sensors respectively. After the nut is locked, the upper valve plate group flatness detector 96 detects the flatness value based on the data difference of the three displacement sensors. The various components of the quality inspection system are respectively communicated with the assembly controller.

[0070] Through the inspection at each inspection station, unqualified semi-finished products can be eliminated in time to ensure the assembly quality.

[0071] Embodiment 10, a control method of a CDC shock absorber bottom valve automatic assembly machine, using a CDC shock absorber bottom valve automatic assembly machine to automatically assemble a bottom valve assembly, comprising the following steps:

[0072] Step 1, the assembly controller controls the circulation driver 13 to drive multiple bottom valve assembly assembly tools 12 to move in a step-by-step circulation manner at the upper station in the circulation chute 11, and multiple station position sensors mark the stepping positions as screw assembly position, screw detection position, lower valve plate assembly position, lower valve plate detection position, bottom valve assembly position, bottom valve detection position, upper valve plate assembly position, upper valve plate detection position, stop seat assembly position, nut assembly position, nut locking detection position and flatness detection position;

[0073] Step 2, when the bottom valve assembly assembly tool 12 runs to the screw assembly position, the assembly controller controls the screw feeding mechanism to grab the screws 101 to be assembled and put them into the screw clamping position, controls the circulation driver 13 to act, and the bottom valve assembly tool 12 runs to the screw detection position. The screw assembly height detector 91 feeds back the initial height of the screw assembly surface detected, and the bottom valve assembly tool 12 continues to run to the lower valve assembly assembly position;

[0074] Step 3, the assembly controller controls the action of the stacking and feeding mechanism of the lower valve plate group, grabs the lower valve plate group 102 to be assembled stacked on the valve plate circulation stacking mechanism, and places it on the nut of the screw 101 to be assembled at the valve plate group assembly position, controls the bottom valve assembly tool 12 to run to the lower valve plate group detection position, and the lower valve plate group assembly height detector 92 feeds back the lower valve plate detection height. If the assembly controller judges that it is qualified based on the lower valve plate detection height and the bottom valve detection height benchmark, the bottom valve assembly tool 12 continues to run to the bottom valve assembly position;

[0075] Step 4: the assembly controller controls the bottom valve feeding mechanism to move, grabs the bottom valve 103 to be assembled and places it on the lower valve plate group 102 to be assembled, controls the bottom valve assembly tool 12 to run to the bottom valve detection position, and the bottom valve assembly height detector 93 feeds back the bottom valve detection height, then the bottom valve assembly tool 12 continues to run to the upper valve plate group assembly position;

[0076] Step 5: The assembly controller controls the stacking and feeding mechanism of the upper valve plate group to move, grabs the upper valve plate group 104 to be assembled and places it on the bottom valve 103 to be assembled, controls the bottom valve assembly tool 12 to run to the upper valve plate group detection position, and the upper valve plate group assembly height detector 94 feeds back the upper valve plate detection height. The assembly controller uses the bottom valve detection height as a reference, and judges that it is qualified based on the upper valve plate detection height and the bottom valve detection height reference, then the bottom valve assembly tool 12 continues to run to the nut assembly position;

[0077] Step 6, the assembly controller controls the movement of the nut assembly mechanism, grabs the nut 105 to be assembled, places it on the upper valve plate group 104 to be assembled and tightens it, controls the bottom valve assembly assembly tool 12 to run to the nut locking detection position, and after the nut is locked, the assembly height detector 95 feedbacks the nut assembly surface height and the top surface height of the screw 101 to be assembled after the assembly is completed. The assembly controller uses the nut assembly surface height as a reference, and judges that it is qualified based on the top surface height of the screw 101 to be assembled and the nut assembly surface height reference. The bottom valve assembly assembly tool 12 continues to run to the flatness detection position. After the nut is locked, the upper valve plate group flatness detector 96 feedbacks that the detection is qualified, then the assembly controller controls the bottom valve assembly assembly tool 12 to continue to run to the output end of the bottom valve assembly, and removes the bottom valve assembly through the transfer and transverse grasping and releasing mechanism 108 and places it on the feeding end of the bottom valve assembly output belt 109.

[0078] The upper valve plate assembly flatness detector 96 is implemented based on three-point detection. The three-point detection is to detect three points on the surface of the upper valve plate assembly 104, and compare the three height detection differences within the set difference range to be qualified.

[0079] Hardware Description:

[0080] 1. The measuring block and measuring needle are made of SKD11 material, with HRC55 or above after heat treatment.

[0081] 2. The overall detection mechanism needs to be firmly fixed, and the detection action needs to be stable;

[0082] 3. It is necessary to make a test standard block.

[0083] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A CDC shock absorber bottom valve automatic assembly machine, characterized by: The invention comprises a bottom valve assembly circulation assembly mechanism, a screw feeding mechanism, a valve sheet circulation stacking mechanism, a lower valve sheet group stacking feeding mechanism, a bottom valve feeding mechanism, an upper valve sheet group stacking feeding mechanism and a nut assembly mechanism. The circulation assembly mechanism comprises a circulation slide (11), a plurality of bottom valve assembly tooling (12) and a circulation driver (13). The plurality of bottom valve assembly tooling (12) are respectively assembled in the circulation slide (11). The circulation driver (13) drives the plurality of bottom valve assembly tooling (12) to move in a step-by-step circulation manner at the upper station of the circulation slide (11). The bottom valve assembly tooling (12) is provided with a screw clamping position. The screw feeding mechanism is used to grab the screws (101) to be assembled and put them into the screw clamping position. The valve sheet circulation stacking mechanism is located on one side of the circulation assembly mechanism. The valve sheet circulation stacking mechanism comprises a valve sheet stacking circulation slide (21), a plurality of valve sheet stacking tooling (12) and a circulation driver (13). The valve sheet stacking tooling (22) and the stacking circulation driver (23) drive the plurality of valve sheet stacking tooling (22) to move in a step-by-step circulation manner on the upper station of the valve sheet stacking circulation slide (21); the lower valve sheet group stacking feeding mechanism is used to stack the lower valve sheet group (102) to be assembled on the valve sheet circulation stacking mechanism, and grab the lower valve sheet group (102) to be assembled and place it on the nut of the screw (101) to be assembled; the bottom valve feeding mechanism is used to grab the bottom valve (103) to be assembled and place it on the lower valve sheet group (102) to be assembled; the upper valve sheet group stacking feeding mechanism is used to stack the upper valve sheet group (104) to be assembled on the valve sheet circulation stacking mechanism, and grab the upper valve sheet group (104) to be assembled and place it on the bottom valve (103) to be assembled; and the nut assembly mechanism is used to grab the nut (105) to be assembled, place it on the upper valve sheet group (104) to be assembled and tighten it.

2. The CDC shock absorber bottom valve automatic assembly machine according to claim 1, characterized in that: The circulation assembly mechanism also includes an assembly base plate (106), the assembly base plate (106) is detachably mounted on the frame (107) via a plurality of support rods, the circulation chute (11) is mounted on the upper surface of the assembly base plate (106), the circulation driver (13) is mounted on the bottom surface of the assembly base plate (106), the driving rod of the circulation driver (13) is transmission-connected to the bottom of the bottom valve assembly assembly tool (12) via a transmission member; the valve sheet stacking circulation chute (21) is mounted on the upper surface of the assembly base plate (106) and is located on one side of the circulation chute (11), the stacking circulation driver (23) is mounted on the bottom surface of the assembly base plate (106), and the driving rod of the stacking circulation driver (23) is transmission-connected to the bottom of the valve sheet stacking tool (22) via a transmission member.

3. The CDC shock absorber bottom valve automatic assembly machine according to claim 2, characterized in that: The screw feeding mechanism comprises at least one automatic screw feeding machine (31), a screw transverse movement mechanism (32) and a screw grasping and releasing mechanism (33). The automatic screw feeding machine (31) and the screw transverse movement mechanism (32) are respectively mounted on a frame (107) and located on one side of an assembly base plate (106). The screw grasping and releasing mechanism (33) is mounted on a transverse movement portion of the screw transverse movement mechanism (32). The transverse movement portion drives the screw grasping and releasing mechanism (33) to move between a screw discharge port of the automatic screw feeding machine (31) and screw assembly positions of a plurality of bottom valve assembly tooling (12). When located at the screw discharge port, the screw grasping and releasing mechanism (33) grasps the screws to be assembled (101), and when transversely moved to the screw assembly position, the screw grasping and releasing mechanism (33) puts down the screws to be assembled (101).

4. The CDC shock absorber bottom valve automatic assembly machine according to claim 3, characterized in that: The lower valve plate stacking and loading mechanism comprises a plurality of lower valve plate pushing mechanisms, a lower valve plate positioning and guiding mechanism and a lower valve plate group transverse movement and grasping mechanism (55). The lower valve plate pushing mechanism comprises a pushing base (41), a pushing cylinder (42), a pushing connecting plate (43), a pushing plate (44) and a valve plate stacking device. The pushing base (41) is provided with a pushing plate sliding groove. The bottom of the pushing base (41) is mounted on an assembly base plate (106) and is located on one side of the valve plate circulation stacking mechanism and slides in the pushing plate sliding groove. The pushing cylinder (42) is mounted on the bottom surface of the assembly base plate (106). The piston rod of the pushing cylinder (42) is transmission-connected to the pushing plate (44) through the pushing connecting plate (43) to drive the pushing plate (44) to slide in the pushing plate sliding groove. The valve plate stacking device comprises a plurality of spring columns (46), a guide rod assembly (47), a valve plate A storage rod (48), a valve plate frame (49), a valve plate lower pressing block (50) and a valve plate upper pressing block (51); the bottom of the plurality of spring columns (46) are mounted on the pusher base (41) and span the top of the pusher plate sliding groove; the valve plate lower pressing block (50) is assembled on the bottom of the plurality of spring columns (46); the plurality of spring columns (46) press the valve plate lower pressing block (50) against the upper surface of the pusher base (41); the bottom of the guide rod assembly (47) is mounted on the valve plate lower pressing block (50); the valve plate frame (49) is mounted on the mounting hole in the middle of the valve plate lower pressing block (50); one end of the valve plate storage rod (48) is connected to the top of the guide rod assembly (47) and the other end is inserted into the valve plate frame (49); the valve plate upper pressing block (51) is located on the valve plate storage rod (48); and a plurality of valve plates of the same specification are stored on the valve plate storage rod (48) below the valve plate upper pressing block (51); The lower valve plate positioning and guiding mechanism comprises a positioning bracket (52), a plurality of valve plate pressing and releasing cylinders (53) and a plurality of pressing rods (54); the bottom of the positioning bracket (52) is mounted on the assembly base plate (106) and is located in the middle of the valve plate stacking circulation slideway (21); the plurality of valve plate pressing and releasing cylinders (53) are respectively mounted on the positioning bracket (52); one end of the plurality of pressing rods (54) is respectively connected to the piston rods of the plurality of valve plate pressing and releasing cylinders (53); when the piston rods of the valve plate pressing and releasing cylinders (53) are extended, the valve plate is pressed onto the valve plate stacking tooling (22); The bottom of the lower valve plate group transverse movement grasping and placing mechanism (55) is mounted on the assembly bottom plate (106), grasps the lower valve plate group (102) to be assembled that has been stacked on the valve plate stacking tool (22), and transversely moves and places it on the lower valve plate group assembly position of the valve plate stacking tool (22), and places the lower valve plate group (102) to be assembled on the nut of the screw (101) to be assembled.

5. The CDC shock absorber bottom valve automatic assembly machine according to claim 4, characterized in that: The bottom valve feeding mechanism comprises a bottom valve circulating conveying device (61) and a bottom valve transverse moving grasping and releasing mechanism (62), wherein the bottom valve circulating conveying device (61) is located on one side of the bottom valve assembly circulating assembly mechanism, and the bottom of the bottom valve transverse moving grasping and releasing mechanism (62) is installed on an assembly bottom plate (106), and the bottom valve (103) to be assembled on the bottom valve circulating conveying device (61) is grasped and transversely moved to the bottom valve assembly position of the bottom valve assembly assembly tool (12), and is placed on the lower valve plate group (102) to be assembled.

6. The CDC shock absorber bottom valve automatic assembly machine according to claim 5, characterized in that: The upper valve plate stacking and loading mechanism comprises a plurality of upper valve plate pushing mechanisms (71), an upper valve plate positioning and guiding mechanism (72) and an upper valve plate transverse shifting and grasping mechanism (73). The upper valve plate stacking and loading mechanism is mounted on an assembly base plate (106) and is located on one side of the lower valve plate stacking and loading mechanism. The upper valve plate pushing mechanism (71) has the same structure as the lower valve plate pushing mechanism. The upper valve plate positioning and guiding mechanism (72) has the same structure as the lower valve plate positioning and guiding mechanism. The upper valve plate transverse shifting and grasping mechanism (73) grasps the stacked upper valve plate group (104) to be assembled and transversely moves to the upper valve plate group assembly position, and places the upper valve plate group (104) to be assembled on the upper surface of the bottom valve (103) to be assembled.

7. The CDC shock absorber bottom valve automatic assembly machine according to claim 6, characterized in that: It also includes a stop seat feeding mechanism, which includes a stop seat feeding machine (74) and a stop seat transverse movement grasping and releasing mechanism (75), wherein the stop seat feeding machine (74) is mounted on a frame (107), and the stop seat transverse movement grasping and releasing mechanism (75) grasps the stop seat to be assembled of the stop seat feeding machine (74), and transversely moves and places it at the stop seat assembly position of the bottom valve assembly assembly tool (12).

8. The CDC shock absorber bottom valve automatic assembly machine according to claim 7, characterized in that: The nut assembly mechanism comprises a nut loader (81), a nut transverse movement grasping and releasing mechanism (82) and a nut tightening gun (83). The nut loader (81) and the nut transverse movement grasping and releasing mechanism (82) are respectively mounted on a frame (107). The nut transverse movement grasping and releasing mechanism (82) grasps the nut (105) to be assembled at the discharge end of the nut loader (81), and transversely moves and places it at a nut assembly position of a bottom valve assembly assembly tool (12). The nut tightening gun (83) tightens the nut (105) to be assembled onto the screw (101) to be assembled. After tightening, the screw (101) to be assembled, the lower valve plate group (102) to be assembled, the bottom valve (103) to be assembled, the upper valve plate group (104) to be assembled, the stop seat to be assembled and the nut (105) to be assembled form a bottom valve assembly.

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