A workbench for assembling a solenoid valve bracket

Abstract

The present invention relates to the field of solenoid valve assembly, and discloses a workbench for assembling a solenoid valve bracket. The workbench includes a working disc, a fixture base fixedly installed on the working disc, and a center rod feeding device, a C-shaped bracket feeding device, a riveting device, a switching device, a washer feeding device, a sealing ring feeding device and a blanking device are arranged around the working disc in the assembly sequence. The working disc passes the fixture base through the center rod feeding device, the C-shaped bracket feeding device, the riveting device, the switching device, the washer feeding device, the sealing ring feeding device and the blanking device in sequence to complete the assembly of the solenoid valve bracket. It has the advantages of high automation degree, precise control and high labor efficiency.

Description

Technical Field

[0001] The present invention relates to the field of non-standard automation, and particularly to a workbench for assembling a solenoid valve bracket. Background Art

[0002] In the existing household appliance field, solenoid valves are widely used. However, the installation of the existing solenoid valve brackets generally still adopts manual assembly. The solenoid valve bracket generally includes a C-shaped bracket. A fixed shaft is fixedly installed on one surface of the C-shaped bracket, and a gasket and a sealing ring are installed inside the fixed shaft.

[0003] Among them, the C-shaped bracket needs to be riveted to the center rod. After riveting, the gasket is assembled, and after the gasket assembly is completed, the sealing ring is assembled. The involved process steps are numerous, and the parts are small, making manual operation difficult. At the same time, the perpendicularity requirement for the center rod is relatively high, and the yield rate of manual operation is low.

[0004] In order to solve the above technical problems, the present solution provides a fully automatic assembly workbench. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A workbench for assembling a solenoid valve bracket, the solenoid valve bracket for assembly includes a C-shaped fixing bracket, a center rod riveted on the C-shaped fixing bracket, and a washer and a sealing ring sleeved on the center rod, wherein the center rod is riveted inside the C-shaped bracket;

[0007] The workbench includes a work disc, a fixture base fixedly installed on the work disc, and a center rod feeding device, a C-shaped bracket feeding device, a riveting device, a switching device, a washer feeding device, a sealing ring feeding device, and a blanking device are arranged around the work disc in the assembly order;

[0008] The work disc passes the fixture base through the center rod feeding device, the C-shaped bracket feeding device, the riveting device, the switching device, the washer feeding device, the sealing ring feeding device, and the blanking device in sequence to complete the assembly of the solenoid valve bracket;

[0009] The fixture base includes a fixed bottom plate, and an assembly area mounting seat and a riveting area mounting seat are arranged on the fixed bottom plate; a positioning groove matching the shape of the bracket edge is arranged in the assembly area mounting seat, a limiting hole for positioning the center rod is arranged in the middle of the positioning groove, the bottom surface of the positioning groove is used to abut against the bottom plate of the bracket, and the side surface of the positioning groove is used to limit the side surfaces of the bracket side plate and the bracket bottom plate; the riveting area mounting seat includes a positioning boss, a center rod center hole for installing the center rod is opened in the middle of the positioning boss, the side surface of the positioning boss is used to fit against the side plate of the bracket, and the top surface of the positioning boss is used to abut against the bottom plate of the bracket;

[0010] The riveting area is used for feeding the central rod feeding device, feeding the C-shaped bracket feeding device, and riveting by the riveting device; after riveting, the C-shaped bracket and the central rod are turned and positioned to the assembly area through the switching device; the assembly area is used for feeding and assembling the washer feeding device and feeding and assembling the sealing ring feeding device.

[0011] Preferably, the distance between the sides of the positioning boss is wider at the bottom and narrower at the top; the riveting area mounting seat further includes a riveting base, the riveting base is fixed on the fixed bottom plate, the positioning boss is located above the riveting base, a riveting center hole is provided in the middle of the riveting base, and the riveting center hole is coaxially arranged with the limiting hole; a riveting ejector rod assembly is arranged below the riveting base, and the riveting ejector rod assembly is used to cooperate with the riveting machine to rivet the central rod and the bracket; a limiting groove is arranged on the side of the riveting base, the width of the limiting groove is the same as the width of the bracket side plate, and the lower part of the bracket side plate is clamped in the limiting groove.

[0012] Preferably, the riveting ejector rod assembly includes an ejector rod installed in the riveting center hole, a limiting ring is arranged on the ejector rod, a return spring is sleeved on the ejector rod, the riveting base, the positioning boss and the fixed bottom plate are integrally formed structures, and the riveting center hole penetrates the fixed bottom plate; one end of the return spring abuts against the fixed bottom plate, and the other end abuts against the limiting ring; the lower end of the central rod installed in the limiting hole abuts against the ejector rod, and the upward movement of the ejector rod drives the upward movement of the central rod; an avoidance groove one is arranged above the positioning boss, and an avoidance groove two for positioning and clamping the central rod is arranged above the riveting base; the riveting ejector rod assembly further includes a first fixing plate, the first fixing plate is installed below the turntable, a first installation groove is arranged on the inner side of the first fixing plate, the limiting ring is installed in the first installation groove, and the lower end of the ejector rod passes through the bottom of the first installation groove, and the ejector rod can slide up and down when the lower end of the ejector rod is stressed.

[0013] Preferably, it includes a feeding track, a transportation mechanism, and a picking arm;

[0014] The feeding mechanism is used for transporting the C-shaped bracket and transporting the C-shaped bracket to the transportation mechanism;

[0015] The transportation mechanism is used for receiving the C-shaped bracket from the feeding mechanism and transporting the C-shaped bracket to the picking station of the picking arm;

[0016] The picking arm is used for taking out the C-shaped bracket from the transportation mechanism and sending it to the next station;

[0017] The described transportation mechanism includes a sliding platform. A storage groove for receiving the C-shaped bracket is provided on the sliding platform. An NG box is arranged on one side of the transportation mechanism, and the NG box is used to place unqualified C-shaped brackets. An installation bracket is arranged on the side of the storage groove close to the material taking arm. A guiding member is arranged at the upper end of the installation bracket. The guiding member has a feeding port and a guiding track. The bottom surface of the guiding track is an inclined surface, and the lower end of the inclined surface is close to the NG box. During operation, the transportation mechanism moves the C-shaped bracket to the material taking position. At the same time, the guiding member slides from the material taking position to one side, and the material taking arm takes the material. When the C-shaped bracket does not meet the requirements and needs to be NG, the sliding platform drives the guiding member and the storage groove to return to the original position. The guiding member returns to the material taking position, and the material taking arm drops the material into the guiding member and is collected by the NG box. The guiding member includes a first side plate and a second side plate arranged in parallel. The bottoms of the first side plate and the second side plate are connected by a bottom plate. The bottom plate is inclined, and the lower end of the bottom plate faces the NG box. The installation bracket is an L-shaped bracket formed by bending, including a vertical bracket and a horizontal bracket. The horizontal bracket is fixedly installed on the sliding platform. The described guiding member is fixedly installed at the end of the vertical bracket and is located inside the installation bracket. The height of the plane where the highest point of the guiding member is located is lower than the height of the plane where the lowest point is located when the C-shaped bracket is clamped up.

[0018] Preferably, the sliding platform includes a sliding cylinder. A base is fixed on the sliding plate of the sliding cylinder. A positioning seat protrudes in the middle of the base. A storage groove is arranged on the side of the positioning seat close to the feeding mechanism. The storage groove is of the same width as the C-shaped bracket. The depth of the storage groove is less than the height of the C-shaped bracket. The transportation mechanism includes a cylinder assembly, including a first cylinder that slides horizontally, a second cylinder that lifts vertically, and a pneumatic gripper for gripping the C-shaped bracket. A detection probe is installed on the positioning seat, and the detection probe is used to detect whether there is a workpiece in the positioning groove. A baffle is arranged on the side of the NG box close to the installation bracket, and the baffle is used to limit the opening of the storage groove to prevent the C-shaped bracket from falling.

[0019] Preferably, the central rod feeding device has the same structure as the C-shaped bracket feeding device, except that the structure matching the C-shaped bracket is replaced with a structure matching the stepped central rod.

[0020] Preferably, the washer feeding device includes a washer transportation track, a collection device, and a collection platform. The collection device includes a collection arm, and the collection arm can move horizontally and vertically.

[0021] A collection unit and a control unit are installed on the collection arm. The collection unit is a gripper assembly for clamping on the side of the washer. The control unit includes a positioning unit and a shaft pushing unit. Positioning holes for cooperating with the positioning unit are arranged on the collection platform.

[0022] The positioning unit includes a positioning rod. The other end of the positioning rod is installed in the mounting seat. A spring is arranged in the mounting seat. The spring is softly connected to the end of the positioning rod. When the positioning rod is subjected to an external force, it moves axially, the spring is compressed. When the external force is removed, the spring releases and the positioning rod returns to its original position;

[0023] The acquisition device further includes a mounting plate. The axial pushing unit is installed on the mounting plate. The axial pushing unit includes a driving unit and a driving block connected to the driving unit. A guiding hole for the positioning rod to pass through is arranged on the driving block. The driving block can move axially under the drive of the driving unit;

[0024] During operation, the washer is sent above the positioning hole and coaxially arranged with the positioning hole. The positioning rod is inserted into the inner ring of the washer and its end extends into the positioning hole under the drive of the axial pushing unit; The acquisition unit clamps on the outer side surface of the washer; The acquisition arm drives the washer to move and transports it to the assembly station.

[0025] Preferably, the acquisition arm includes a horizontal bracket arranged above. A transverse pushing cylinder is fixedly installed on the horizontal bracket and a vertical bracket that slides horizontally driven by the transverse cylinder. A vertical cylinder slide is installed on the vertical bracket. The control unit is fixedly installed on the cylinder slide and moves up and down driven by the vertical slide; The mounting plate is fixedly installed on the cylinder slide. The acquisition unit and the axial pushing unit are respectively fixedly installed on both sides of the mounting plate. The driving block is located between the two jaws of the pneumatic gripper; The driving block includes a first plate vertically connected to the moving part of the axial pushing unit, a second plate horizontally extending between the two jaws of the pneumatic gripper, and a pushing block fixedly connected to the end of the second plate; The mounting seat is fixedly installed on the mounting plate and is located above the pushing block. A through guiding hole is arranged at the end of the pushing block. The positioning rod passes through the guiding hole and extends below the pushing block; The shaft diameter of the positioning rod is smaller than the inner diameter of the washer, and the outer diameter of the washer is larger than the inner diameter of the positioning hole; The transportation track includes a longitudinal transportation track and a transverse transportation track. The longitudinal transportation track and the transverse transportation track are arranged in a T shape; The transverse transportation track transports the gasket to the end and enters the longitudinal transportation track. The longitudinal transportation track includes a transportation cylinder and a push plate connected to the moving end of the transportation cylinder. An arc-shaped notch matching the edge of the gasket is arranged at the end of the push plate. A limiting step is arranged on one side of the positioning hole. The track widths of the transverse transportation track and the longitudinal transportation track are equal to the outer diameter of the washer.

[0026] Preferably, the riveting device includes a riveting auxiliary support device installed below the lower end of the ejector rod, and a riveting machine installed above the positioning boss. The riveting auxiliary support device includes a pedestal. A push block that can move horizontally is arranged below the pedestal. The upper end surface of the push block is set as a sliding surface, and the sliding surface is an inclined plane or an inclined arc surface. A top block abuts against the sliding surface, and the upper part of the top block is used to abut against the lower end surface of the ejector rod. The horizontal movement of the push block can make the top block rise or fall through the inclined plane or the inclined arc surface. The rising of the top block can drive the ejector rod to move upward, and cooperate with the riveting machine pressing on the end of the ejector rod to realize the riveting of the center rod and the C-shaped bracket. The center rod is a stepped shaft part, and the thin shaft part at the upper end is used for riveting.

[0027] Preferably, the switching device is a driving cylinder group, including a displacement cylinder for horizontal movement close to the fixture base, a clamping cylinder for clamping the C-shaped bracket, a separation cylinder for vertical movement of the C-shaped bracket to disengage and cooperate with the positioning boss, and a turning cylinder for placing the C-shaped bracket in the assembly. An auxiliary positioning cylinder is also installed on the working disk, and the auxiliary positioning cylinder includes an auxiliary positioning jaw for clamping the center rod.

[0028] Through the above technical solutions, the present invention has the following technical effects:

[0029] The designed assembly workbench in this solution can realize the automatic assembly of four components, with high assembly accuracy, high assembly efficiency, saving a large amount of labor and material costs, and having a high qualified product rate. Description of the Drawings

[0030] Figure 1 It is the overall assembly drawing of the workbench.

[0031] Figure 2 It is the schematic structural diagram of the base.

[0032] Figure 3 It is the schematic diagram of the cooperation between the base and the working turntable.

[0033] Figure 4 It is the schematic structural diagram of the riveting device.

[0034] Figure 5 It is the schematic structural diagram of the washer feeding device.

[0035] Figure 6 It is the schematic structural diagram of the control unit in the washer feeding device.

[0036] Figure 7 It is the schematic structural diagram of the control unit in the washer feeding device.

[0037] Figure 8 It is the schematic structural diagram of the transportation track.

[0038] Figure 9It is an assembly schematic diagram of the mounting base and the positioning rod.

[0039] Figure 10 It is a structural schematic diagram of the feeding device for the C-shaped bracket.

[0040] Figure 11 It is a structural schematic diagram of the transportation mechanism in the feeding device for the C-shaped bracket.

[0041] Figure 12 It is a structural schematic diagram of the NG box in the feeding device for the C-shaped bracket.

[0042] The reference numerals in the figure are for the following technical names:

[0043] 1 - Loading track, 2 - Transportation mechanism, 3 - Material-taking arm, 4 - Placing groove, 5 - NG box, 6 - Mounting bracket, 7 - Guide, 8 - Guide track, 9 - First side plate, 10 - Second side plate, 11 - Bottom plate, 12 - Vertical bracket, 13 - Horizontal bracket, 15 - Sliding platform, 16 - Sliding cylinder, 17 - First cylinder, 18 - Second cylinder, 19 - Pneumatic gripper, 20 - Baffle, 200 - Washer transportation track, 202 - Acquisition device, 203 - Acquisition platform, 204 - Acquisition arm, 205 - Acquisition unit, 206 - Control unit, 207 - Positioning unit, 208 - Axial pushing unit, 209 - Positioning hole, 210 - Positioning rod, 211 - Mounting base, 212 - Spring, 213 - Mounting plate, 214 - Horizontal bracket, 215 - Vertical bracket, 216 - Transverse pushing cylinder, 217 - Cylinder slide, 218 - Driving unit, 219 - Driving block, 220 - First plate, 221 - Second plate, 222 - Transverse transportation track, 223 - Vertical transportation track, 224 - Limiting step, 400 - Assembly area, 401 - Riveting area, 402 - Positioning groove, 403 - Limiting hole, 404 - Fixed bottom plate, 405 - Positioning boss, 416 - Center rod center hole, 407 - Riveting base, 408 - Riveting center hole, 409 - Ejector rod, 410 - Limiting ring, 411 - Return spring, 412 - Avoidance groove one, 413 - Avoidance groove two, 414 - Turntable, 415 - First fixing plate, 417 - Bracket, 418 - Center rod, 500 - Center rod feeding device, 501 - C-shaped bracket loading device, 502 - Riveting device, 503 - Switching device, 504 - Washer loading device, 505 - Sealing ring loading device, 506 - Unloading device, 507 - Riveting auxiliary support device, 508 - Riveting machine, 509 - Bench, 510 - Sliding surface, 511 - Top block, 512 - Pushing block, 515 - Fixture base. Detailed implementation manners

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0045] Embodiment 1

[0046] A workbench for assembling a solenoid valve bracket. For the convenience of subsequent description, the structure of the bracket assembly is roughly described in this embodiment: The solenoid valve bracket for assembly includes a C-shaped fixing bracket, a central rod riveted to the C-shaped fixing bracket, and a washer and a sealing ring sleeved on the central rod. The central rod is riveted to the inner side of the C-shaped bracket. The specific shape of the C-shaped bracket includes two parallel side plates and a bottom plate connected to one end of the two side plates. The overall shape of the three plates is C-shaped. The central rod is a stepped shaft part. The thin shaft part is used for riveting with the C-shaped bracket, and the thick shaft part is located between the two side plates of the C-shaped bracket after assembly. The thick shaft part is used for installing the washer and the sealing ring.

[0047] The workbench includes a work disk 414, a fixture base 515 fixedly installed on the work disk 414. Around the work disk 414, a central rod feeding device 500, a C-shaped bracket feeding device, a riveting device 502, a switching device 503, a washer feeding device 504, a sealing ring feeding device 505, and a blanking device 506 are arranged in the assembly sequence. The fixture bases 515 are distributed along the circumference of the work disk. The number of fixture bases 515 corresponds to the assembly stations distributed around the work disk. The work disk is driven by a servo motor or a stepping motor to ensure that the fixture bases 515 can move through each station one by one.

[0048] The work disk 414 passes the fixture base 515 through the central rod feeding device 500, the C-shaped bracket feeding device, the riveting device 502, the switching device 503, the washer feeding device 504, the sealing ring feeding device 505, and the blanking device 506 in sequence to complete the assembly of the solenoid valve bracket.

[0049] In this embodiment, the fixture base 515 includes a fixed bottom plate 404. On the fixed bottom plate 404, an assembly area 400 mounting seat and a riveting area 401 mounting seat are provided. In the assembly area 400 mounting seat, a positioning groove 402 matching the shape of the edge of the bracket 417 is provided. In the middle of the positioning groove 402, a limiting hole 403 for positioning the central rod 418 is provided. The bottom surface of the positioning groove 402 is used to abut against the bottom plate of the bracket 417, and the side surface of the positioning groove 402 is used to limit the side surfaces of the side plate and the bottom plate of the bracket 417. The riveting area 401 mounting seat includes a positioning boss 405. In the middle of the positioning boss 405, a central rod 418 central hole 416 for installing the central rod 418 is provided. The side surface of the positioning boss 405 is used to fit against the side plate of the bracket 417, and the top surface of the positioning boss 405 is used to abut against the bottom plate of the bracket 417.

[0050] The riveting area 401 is used for feeding the central rod feeding device 500, feeding the C-shaped bracket feeding device, and riveting by the riveting device 502; after riveting, the C-shaped bracket and the central rod are turned and positioned to the assembly area by the switching device 503; the assembly area is used for feeding and assembling the washer feeding device 504 and feeding and assembling the sealing ring feeding device 505.

[0051] Wherein the shape of the positioning groove 402 is rectangular. In order to facilitate the positioning of the bracket 417, the distance between the sides of the positioning boss 405 is wider at the bottom and narrower at the top. This structure can facilitate the assembly of the bracket 417 and the positioning boss 405, and avoid problems such as jamming or misalignment during the loading process.

[0052] In this embodiment, the mounting seat of the riveting area 401 further includes a riveting base 407. The riveting base 407 is fixed on the fixed bottom plate 404. The positioning boss 405 is located above the riveting base 407. A riveting center hole 406 is provided in the middle of the riveting base 407. The riveting center hole 406 is coaxially arranged with the limiting hole 403; a riveting ejector rod assembly is arranged below the riveting base 407. The riveting ejector rod assembly is used to cooperate with the riveting machine 508 to rivet the central rod 418 and the bracket 417. In this embodiment, the riveting base 407 and the positioning boss 405 are of an integrally formed structure.

[0053] In order to ensure the position of the bracket 417 on the positioning boss 405, a limiting groove is provided on the side of the riveting base 407. The width of the limiting groove is the same as the width of the side plate of the bracket 417. The lower part of the side plate of the bracket 417 is clamped in the limiting groove. During assembly, the two side plates of the bracket 417 are respectively clamped on the sides of the positioning boss 405 and the riveting base 407, its end is inserted into the limiting groove, and at the same time the bottom plate of the bracket 417 abuts against the upper end surface of the positioning base.

[0054] An avoidance groove one 412 is provided above the positioning boss 405. One of the central rods 418 is of a stepped rod structure. The upper thin rod part is used for riveting, and the lower thick rod part is used for assembling washers and sealing rings. An avoidance groove two 413 for positioning and clamping the central rod 418 is provided above the riveting base 407. The auxiliary positioning device can be clamped on the side of the central rod 418 through the avoidance groove two 413, so as to ensure the perpendicularity of the central rod 418 during the riveting process.

[0055] In this embodiment, the riveting ejector rod assembly includes an ejector rod 409 installed in the riveting center hole 406. A limit ring 410 is provided on the ejector rod 409, and a return spring 411 is sleeved on the ejector rod 409. The riveting base 407, the positioning boss 405, and the fixed bottom plate 404 are of an integrally formed structure, and the riveting center hole 406 penetrates through the fixed bottom plate 404. One end of the return spring 411 abuts against the fixed bottom plate 404, and the other end abuts against the limit ring 410. The lower end of the center rod 418 installed in the limit hole 403 abuts against the ejector rod 409, and the upward movement of the ejector rod 409 drives the upward movement of the center rod 418.

[0056] The usage process of this base is as follows: First, place the center rod 418 in the limit hole 403, with the lower end abutting against the ejector rod 409 and the upper end riveting part protruding. Then place the bracket 417 on the positioning boss 405. The side and top surfaces of the positioning boss 405 limit the bracket 417, and the end of the center rod 418 extends from the bottom plate of the bracket 417. Then push the ejector rod 409 to move approximately 0.2 - 0.8 mm, leaving a certain gap between the bottom plate of the bracket 417 and the upper end of the positioning boss 405. Then use the riveting machine 508 for riveting, avoiding the direct action of the force on the positioning boss 405 and extending the service life of the positioning boss 405. After riveting, flip the bracket 417 equipped with the center rod 418 and assemble it in the positioning groove 402 of the assembly area 400 for subsequent washer and seal ring assembly.

[0057] Among them, the riveting device 502 includes a riveting auxiliary support device 507 installed below the lower end of the ejector rod, and a riveting machine 508 installed above the positioning boss. The riveting auxiliary support device 507 includes a pedestal 509. A laterally movable push block 512 is provided below the pedestal 509. The upper end surface of the push block 512 is set as a sliding surface 510. The sliding surface 510 is an inclined surface or an inclined arc surface. A top block 511 abuts against the sliding surface 510. The upper part of the top block 511 is used to abut against the lower end surface of the ejector rod. The lateral movement of the push block 512 can make the top block 511 rise or fall through the inclined surface or the inclined arc surface. The rising of the top block 511 can drive the ejector rod to move upward, and cooperate with the riveting machine 508 pressing on the end of the ejector rod to realize the riveting of the center rod and the C-shaped bracket. The center rod is a stepped shaft part, and the thin shaft part at the upper end is used for riveting. The riveting auxiliary device is used to realize the rising of the above-mentioned ejector rod.

[0058] In this embodiment, the C-shaped bracket feeding device is mainly used to transport the C-shaped bracket to the workbench so that it can automatically cooperate with other workstations for installation. The functions of the feeding device are automatic feeding and the function of quickly removing unqualified items.

[0059] It includes a feeding track 1, a transportation mechanism 2, and a picking arm 3;

[0060] The loading mechanism is used for the transportation of C-shaped brackets and transports the C-shaped brackets to the transportation mechanism 2;

[0061] The transportation mechanism 2 is used to receive the C-shaped brackets from the loading mechanism and transport the C-shaped brackets to the picking position of the picking arm 3;

[0062] The picking arm 3 is used to pick the C-shaped brackets from the transportation mechanism 2 and send them to the next station;

[0063] The described transportation mechanism 2 includes a sliding platform 15. A receiving groove 4 for receiving C-shaped brackets is arranged on the sliding platform 15. An NG box 5 is arranged on one side of the transportation mechanism 2. The NG box 5 is used to place unqualified C-shaped brackets. A mounting bracket 6 is arranged on the side of the receiving groove 4 close to the picking arm 3. A guiding member 7 is arranged at the upper end of the mounting bracket 6. The guiding member 7 has a feeding port and a guiding track 8. The bottom surface of the guiding track 8 is an inclined surface, and the lower end of the inclined surface is close to the NG box 5. During operation, the transportation mechanism 2 moves the C-shaped brackets to the picking position. At the same time, the guiding member 7 slides to one side from the picking position, and the picking arm 3 picks the materials. When the C-shaped brackets do not meet the requirements and need to be NG, the sliding platform 15 drives the guiding member 7 and the receiving groove 4 to return. The guiding member 7 returns to the picking position, and the picking arm 3 throws the materials into the guiding member 7 and is then collected by the NG box 5. Among them, the NG box 5 is a strip-shaped tubular member, and it can collect NG parts.

[0064] In this embodiment, the guiding member 7 includes a first side plate 9 and a second side plate 10 arranged in parallel. The bottoms of the first side plate 9 and the second side plate 10 are connected by a bottom plate 11. The bottom plate 11 is inclined, and the lower end of the bottom plate 11 faces the NG box 5. The inclined structure can achieve the purpose of automatic collection, and this kind of guiding member 7 can prevent the workpiece from falling to other places and ensure the safety and stability of the working process.

[0065] In this embodiment, the mounting bracket 6 is an L-shaped bracket formed by bending, including a vertical bracket 12 and a horizontal bracket 13. The horizontal bracket 13 is fixedly installed on the sliding platform 15. The guiding member 7 is fixedly installed at the end of the vertical bracket 12 and is located inside the mounting bracket 6. The height of the plane where the highest point of the guiding member 7 is located is lower than the height of the plane where the lowest point is located when the C-shaped bracket is clamped.

[0066] In this embodiment, the sliding platform 15 includes a sliding cylinder 16. A base is fixed on the sliding plate of the sliding cylinder 16. A positioning seat protrudes from the middle of the base. A receiving groove 4 is arranged on the side of the positioning seat close to the loading mechanism. The receiving groove 4 is the same width as the C-shaped bracket, and the depth of the receiving groove 4 is less than the height of the C-shaped bracket. The positioning seat and the base are of an integral structure. The reason why the depth of the receiving groove 4 needs to be lower than the height of the workpiece is to facilitate clamping the workpiece, and at the same time, this kind of structural design will not cause the workpiece to fall.

[0067] In this embodiment, the transport mechanism 2 includes a cylinder assembly, which includes a first cylinder 17 that slides horizontally, a second cylinder 18 that moves vertically, and a pneumatic gripper 19 for gripping the C-shaped bracket. A detection probe is installed on the positioning seat, and the detection probe is used to detect whether there is a workpiece in the positioning groove.

[0068] To prevent the workpiece from shaking when driven by the sliding table, a baffle 20 is provided on one side of the NG box 5 close to the mounting bracket 6. The baffle 20 is used to limit the opening of the containing groove 4 to prevent the C-shaped bracket from falling. Therefore, during the entire sliding process, the four sides of the workpiece are limited, ensuring the accuracy of the workpiece position and facilitating automated operation.

[0069] During operation, the transport mechanism 2 moves the C-shaped bracket to the material-taking position. At the same time, the guiding member 7 slides from the material-taking position to one side, and the material-taking arm 3 takes the material. When the C-shaped bracket does not meet the requirements and needs to be NG, the sliding platform 15 drives the guiding member 7 and the containing groove 4 to return. The guiding member 7 returns to the material-taking position, and the material-taking arm 3 throws the material into the guiding member 7 and is thus collected by the NG box 5. The qualified C-shaped brackets are transported to the fixture base 515, specifically to the positioning boss, and are clamped on both sides of the positioning boss, and the side plates of the C-shaped brackets are inserted into the positioning grooves.

[0070] The central rod feeding device has the same structure as the C-shaped bracket feeding device 501, and the only difference is that the design of the feeding and material-taking parts needs to be matched according to the shape of the cylindrical central rod.

[0071] After the central rod feeding, C-shaped bracket feeding, and riveting of the two are completed, the switching station is entered for switching. The switching device 503 is a driving cylinder group, which includes a displacement cylinder for horizontal movement close to the fixture base 515, a clamping cylinder for clamping the C-shaped bracket, a separation cylinder for vertical movement of the C-shaped bracket to disengage from the positioning boss, and a flipping cylinder for placing the C-shaped bracket in the assembly. An auxiliary positioning cylinder is also installed on the working disk, and the auxiliary positioning cylinder includes an auxiliary positioning gripper for clamping the central rod.

[0072] When the riveted C-shaped bracket and central rod assembly are transported to the assembly area, the gaskets and sealing rings are fed.

[0073] The structure of the gasket feeding device 504 is as follows:

[0074] An execution device for assembling a washer and a shaft member, comprising a washer transportation track 200, a collection device 202 and a collection platform 203. The collection device 202 includes a collection arm 204 which can move in the horizontal and vertical directions. Since the washer is a flat ring-shaped part, the transportation track is required to ensure that the washer moves linearly without lateral swing and vertical jump. Therefore, in this solution, a strip-shaped groove-type transportation track is used for transportation.

[0075] A collection unit 205 and a control unit 206 are installed on the collection arm 204. The collection unit 205 is a jaw assembly for clamping on the side of the washer. In this embodiment, the jaws used are two parallel clamping arms that move closer or open in parallel during movement. A horizontal clamping rod for clamping the edge of the washer is connected below the clamping arms, and a notch for clamping is provided at the end of the clamping rod. The control unit 206 includes a positioning unit 207 and a shaft pushing unit 208. A positioning hole 209 for cooperating with the positioning unit 207 is provided on the collection platform 203.

[0076] The positioning unit 207 includes a positioning rod 210. The other end of the positioning rod 210 is installed in a mounting seat 211. A spring 212 is provided in the mounting seat 211. The spring 212 is softly connected to the end of the positioning rod 210. When the positioning rod 210 is subjected to an external force, it moves axially, the spring 212 is compressed, and when the external force is removed, the spring 212 releases and the positioning rod 210 returns to its original position. The entire positioning unit 207 can be driven by the collection arm 204 to move in the vertical direction, and its movement is independent of and does not interfere with that of the shaft pushing unit 208. The two are used in cooperation for clamping and positioning.

[0077] The collection device 202 further includes a mounting plate 213. The shaft pushing unit 208 is installed on the mounting plate 213. The shaft pushing unit 208 includes a driving unit 218 and a driving block 219 connected to the driving unit 218. A guiding hole for the positioning rod 210 to pass through is provided on the driving block 219. The driving block 219 can move axially under the drive of the driving unit 218.

[0078] During operation, the washer is sent above the positioning hole 209 and coaxially arranged with the positioning hole 209. The positioning rod 210 is inserted into the inner ring of the washer and its end extends into the positioning hole 209 under the drive of the shaft pushing unit 208. The collection unit 205 clamps on the outer side surface of the washer. The collection arm 204 drives the washer to move and transport it to the assembly station.

[0079] In this embodiment, the acquisition arm 204 includes a horizontal bracket 214 disposed above. A horizontal push cylinder 216 is fixedly installed on the horizontal bracket 214, and a vertical bracket 215 that relies on the horizontal cylinder to drive horizontal sliding is also installed on the horizontal bracket 214. A vertical cylinder slide 217 is installed on the vertical bracket 215. The control unit 206 is fixedly installed on the cylinder slide 217 and moves up and down driven by the vertical slide. The mounting plate 213 is fixedly installed on the cylinder slide 217. The acquisition unit 205 and the axial push unit 208 are respectively fixedly installed on both sides of the mounting plate 213. The driving block 219 is located between the two jaws of the pneumatic gripper. This structural design can ensure a high degree of product integration, save the overall occupied space, and avoid the problem of low jitter accuracy caused by weight dispersion during equipment operation.

[0080] In this embodiment, the driving block 219 includes a first plate 220 vertically connected to the moving part of the axial push unit 208, a second plate 221 extending horizontally between the two jaws of the pneumatic gripper, and a push block 512230 fixedly connected to the end of the second plate 221; the mounting seat 211 is fixedly installed on the mounting plate 213 and is located above the push block 512230. A through guide hole is provided in the head office of the push block 512230, and the positioning rod 210 passes through the guide hole to the lower part of the push block 512230. To facilitate the positioning of the positioning rod 210, the clamping, and the positioning of the washer, the shaft diameter of the positioning rod 210 is smaller than the inner diameter of the washer, and the outer diameter of the washer is larger than the inner diameter of the positioning hole 209.

[0081] In this embodiment, the transportation track includes a longitudinal transportation track 223 and a transverse transportation track 222, and the longitudinal transportation track 223 and the transverse transportation track 222 are arranged in a T shape; the transverse transportation track 222 transports the gasket to the end and then enters the longitudinal transportation track 223. The longitudinal transportation track 223 includes a transportation cylinder and a push plate connected to the moving end of the transportation cylinder. An arc-shaped notch matching the edge of the gasket is provided at the end of the push plate. A limiting step 224 is provided on one side of the positioning hole 209. The track widths of the transverse transportation track 222 and the longitudinal transportation track 223 are equal to the outer diameter of the washer.

[0082] During operation, the transport track transports the gasket above the positioning hole 209. Its edge is positioned by the side of the track and the side of the limit step 224. Then, the cylinder slide 217 on the vertical bracket 215 drives the positioning rod 210 to pass through the washer and insert into the positioning hole 209, and then the pneumatic gripper clamps it. During the process of transporting it to the assembly table after clamping, the cylinder slide 217 drives the positioning unit 207 and the control unit 206 to move upward synchronously, and then transports it above the assembly shaft of the assembled part. The vertical cylinder slide 217 of the acquisition arm 204 drives the end of the positioning rod 210 to abut against the end of the assembly shaft. Since there is a certain distance deviation between the lower end surface of the washer and the end of the assembly shaft, if the shaft pushing unit 208 is directly used for shaft pushing, it will cause the washer and the positioning rod 210 to be stuck, and it is very difficult to align. In this solution, after the two come into contact, the cylinder slide 217 continues to move, the spring 212 is compressed, the whole positioning rod 210 slides relatively into the interior of the mounting seat 211, and the washer moves relatively downward. When the washer falls on the washer, at this time, the clamping force of the gripper of the acquisition unit 205 is removed, and the shaft pushing unit 208 is used for axial pushing to make the washer fall to the root of the assembly shaft to complete the assembly.

[0083] The seal feeding device 505 is basically similar to the washer feeding device 504. The difference is that since the seal is a flexible part, it does not need to solve the problem of recognizing the head of the washer. Its positioning rod structure can be directly sleeved on the seal, and the seal and the positioning rod are connected by friction. When the positioning rod with the seal abuts against the top of the center rod for positioning, the seal can be directly pushed down to be sleeved on the center rod.

[0084] The C-shaped bracket that has completed the seal assembly has completed the entire assembly, and subsequent inspection and blanking can be carried out.

[0085] Embodiment 2

[0086] The difference between this embodiment and Embodiment 1 is that the sliding platform 15 is a sliding cylinder 16.

[0087] Embodiment 3

[0088] The difference between this embodiment and Embodiment 1 is that the first cylinder 17 and the second cylinder 18 are push rod cylinders.

Claims

1. A workbench for assembling a solenoid valve bracket, characterized in that: The solenoid valve bracket for assembly includes a C-shaped fixing bracket, a central rod riveted on the C-shaped fixing bracket, and a washer and a sealing ring sleeved on the central rod, wherein the central rod is riveted on the inner side of the C-shaped bracket; The workbench includes a work disc, a fixture base fixedly installed on the work disc, and a central rod feeding device, a C-shaped bracket feeding device, a riveting device, a switching device, a washer feeding device, a sealing ring feeding device and a blanking device arranged around the work disc in the assembly order; The work disc sequentially passes the fixture base through the central rod feeding device, the C-shaped bracket feeding device, the riveting device, the switching device, the washer feeding device, the sealing ring feeding device and the blanking device to complete the assembly of the solenoid valve bracket; The fixture base includes a fixed bottom plate, and an assembly area mounting seat and a riveting area mounting seat are arranged on the fixed bottom plate; a positioning groove matching the shape of the bracket edge is arranged in the assembly area mounting seat, a limiting hole for positioning the central rod is arranged in the middle of the positioning groove, the bottom surface of the positioning groove is used to abut against the bottom plate of the bracket, and the side surface of the positioning groove is used to limit the side surfaces of the bracket side plate and the bracket bottom plate; the riveting area mounting seat includes a positioning boss, a central rod center hole for installing the central rod is opened in the middle of the positioning boss, the side surface of the positioning boss is used to fit the side plate of the bracket, and the top surface of the positioning boss is used to abut against the bottom plate of the bracket; The riveting area is used for feeding by the central rod feeding device, feeding by the C-shaped bracket feeding device and riveting by the riveting device; after riveting, the C-shaped bracket and the central rod are turned and positioned to the assembly area by the switching device; the assembly area is used for feeding and assembling by the washer feeding device and feeding and assembling by the sealing ring feeding device; It includes a feeding track, a transportation mechanism, and a picking arm; The feeding mechanism is used for transporting the C-shaped bracket and transporting the C-shaped bracket to the transportation mechanism; The transportation mechanism is used for receiving the C-shaped bracket from the feeding mechanism and transporting the C-shaped bracket to the picking station of the picking arm; The picking arm is used for taking out the C-shaped bracket from the transportation mechanism and sending it to the next station; The described transportation mechanism includes a sliding platform. A placing groove for receiving the C-shaped bracket is provided on the sliding platform. An NG box is arranged on one side of the transportation mechanism, and the NG box is used to place unqualified C-shaped brackets. An installation bracket is arranged on the side of the placing groove close to the material taking arm. A guiding member is arranged at the upper end of the installation bracket. The guiding member has a feeding port and a guiding track. The bottom surface of the guiding track is an inclined surface, and the lower end of the inclined surface is close to the NG box. During operation, the transportation mechanism moves the C-shaped bracket to the material taking position. At the same time, the guiding member slides from the material taking position to one side. The material taking arm takes the material. When the C-shaped bracket does not meet the requirements and needs to be NG, the sliding platform drives the guiding member and the placing groove to return. The guiding member returns to the material taking position, and the material taking arm throws the material into the guiding member and is collected by the NG box. The guiding member includes a first side plate and a second side plate arranged in parallel. The bottoms of the first side plate and the second side plate are connected by a bottom plate. The bottom plate is inclined, and the lower end of the bottom plate faces the NG box. The installation bracket is an L-shaped bracket formed by bending, including a vertical bracket and a horizontal bracket. The horizontal bracket is fixedly installed on the sliding platform, and the described guiding member is fixedly installed at the end of the vertical bracket and is located inside the installation bracket.

2. The workbench for assembling an electromagnetic valve bracket according to claim 1, characterized in that: The distance between the sides of the positioning boss is wider at the bottom and narrower at the top; the riveting area mounting seat further includes a riveting base. The riveting base is fixed on the fixed bottom plate. The positioning boss is located above the riveting base. A riveting center hole is arranged in the middle of the riveting base. The riveting center hole is coaxially arranged with the limiting hole. A riveting ejector rod assembly is arranged below the riveting base. The riveting ejector rod assembly is used to cooperate with the riveting machine to rivet the center rod and the bracket. A limiting groove is arranged on the side of the riveting base. The width of the limiting groove is the same as the width of the bracket side plate. The lower part of the bracket side plate is clamped in the limiting groove.

3. The workbench for assembling an electromagnetic valve bracket according to claim 2, characterized in that: The riveting ejector rod assembly includes an ejector rod installed in the riveting center hole. A limiting ring is arranged on the ejector rod. A return spring is sleeved on the ejector rod. The riveting base, the positioning boss and the fixed bottom plate are of an integrally formed structure. The riveting center hole penetrates the fixed bottom plate. One end of the return spring abuts against the fixed bottom plate, and the other end abuts against the limiting ring. The lower end of the center rod installed in the limiting hole abuts against the ejector rod. The upward movement of the ejector rod drives the upward movement of the center rod. An avoidance groove one is arranged above the positioning boss, and an avoidance groove two for positioning and clamping the center rod is arranged above the riveting base. The riveting ejector rod assembly further includes a first fixing plate. The first fixing plate is installed below the turntable. A first installation groove is arranged inside the first fixing plate. The limiting ring is installed in the first installation groove. The lower end of the ejector rod passes through the bottom of the first installation groove. When the lower end of the ejector rod is stressed, the ejector rod can slide up and down.

4. The workbench for assembling an electromagnetic valve bracket according to claim 1, characterized in that: The sliding platform includes a sliding cylinder. A base is fixed on the sliding plate of the sliding cylinder. A positioning seat protrudes from the middle of the base. A placing groove is arranged on one side of the positioning seat close to the feeding mechanism. The placing groove and the C-shaped bracket are of the same width. The depth of the placing groove is less than the height of the C-shaped bracket. The conveying mechanism includes a cylinder assembly, including a first cylinder that slides horizontally, a second cylinder that lifts vertically, and a pneumatic gripper for gripping the C-shaped bracket. A detection probe is installed on the positioning seat. The detection probe is used to detect whether there is a workpiece in the positioning groove. A baffle is arranged on one side of the NG box close to the mounting bracket. The baffle is used to limit the opening of the placing groove to prevent the C-shaped bracket from falling.

5. The workbench for assembling an electromagnetic valve bracket according to claim 1, characterized in that: The central rod feeding device has the same structure as the C-shaped bracket feeding device, except that the structure matching the C-shaped bracket is replaced with a structure matching the stepped central rod.

6. The workbench for assembling an electromagnetic valve bracket according to claim 1, characterized in that: The washer feeding device includes a washer conveying track, a collecting device and a collecting platform. The collecting device includes a collecting arm that can move horizontally and vertically; A collecting unit and a control unit are installed on the collecting arm. The collecting unit is a gripper assembly for gripping the side of the washer; the control unit includes a positioning unit and a shaft pushing unit; positioning holes for cooperating with the positioning unit are arranged on the collecting platform; The positioning unit includes a positioning rod. The other end of the positioning rod is installed in the mounting seat. A spring is arranged in the mounting seat. The spring is softly connected to the end of the positioning rod. When the positioning rod is subjected to an external force, it moves axially, the spring is compressed, and when the external force is removed, the spring releases and the positioning rod returns to its original position; The collecting device further includes a mounting plate. The shaft pushing unit is installed on the mounting plate. The shaft pushing unit includes a driving unit and a driving block connected to the driving unit. A guiding hole for the positioning rod to pass through is arranged on the driving block. The driving block can move axially under the drive of the driving unit; During operation, the washer is sent above the positioning hole and coaxially arranged with the positioning hole. The positioning rod is inserted into the inner ring of the washer and the end extends into the positioning hole under the drive of the shaft pushing unit; the collecting unit grips the outer side of the washer; the collecting arm drives the washer to move and transport it to the assembly station.

7. The workbench for assembling an electromagnetic valve bracket according to claim 6, characterized in that: The collecting arm includes a horizontal bracket arranged above, a horizontal pushing cylinder fixedly installed on the horizontal bracket, and a vertical bracket that relies on the horizontal cylinder to drive horizontal sliding. A vertical cylinder slide is installed on the vertical bracket, and the control unit is fixedly installed on the cylinder slide and moves up and down driven by the vertical slide. The mounting plate is fixedly installed on the cylinder slide, the collecting unit and the shaft pushing unit are respectively fixedly installed on both sides of the mounting plate, and the driving block is located between the two jaws of the pneumatic gripper. The driving block includes a first plate vertically connected to the moving part of the shaft pushing unit, a second plate horizontally extending between the two jaws of the pneumatic gripper, and a pushing block fixedly connected to the end of the second plate. The mounting seat is fixedly installed on the mounting plate and is located above the pushing block. A through guide hole is provided in the head office of the pushing block, and the positioning rod passes through the guide hole to the lower part of the pushing block. The shaft diameter of the positioning rod is smaller than the inner diameter of the washer, and the outer diameter of the washer is larger than the inner diameter of the positioning hole. The transport track includes a longitudinal transport track and a transverse transport track, and the longitudinal transport track and the transverse transport track are arranged in a T shape. The transverse transport track transports the gasket to the end and enters the longitudinal transport track. The longitudinal transport track includes a transport cylinder and a push plate connected to the moving end of the transport cylinder. An arc-shaped notch matching the edge of the gasket is provided at the end of the push plate. A limiting step is provided on one side of the positioning hole, and the track widths of the transverse transport track and the longitudinal transport track are equal to the outer diameter of the washer.

8. A workbench for assembling an electromagnetic valve bracket according to claim 3, characterized in that: The riveting device includes a riveting auxiliary support device installed below the lower end of the ejector rod and a riveting machine installed above the positioning boss. The riveting auxiliary support device includes a pedestal. A laterally movable push block is provided below the pedestal. The upper end surface of the push block is set as a sliding surface, and the sliding surface is an inclined surface or an inclined arc surface. A top block abuts on the sliding surface, and the lower end surface of the ejector rod is used to abut above the top block. The lateral movement of the push block can make the top block rise or fall through the inclined surface or the inclined arc surface. The rising of the top block can drive the ejector rod to move upward, and cooperate with the riveting machine pressing on the end of the ejector rod to realize the riveting of the center rod and the C-shaped bracket. The center rod is a stepped shaft part, and the thin shaft part at the upper end is used for riveting.

9. A workbench for assembling an electromagnetic valve bracket according to claim 8, characterized in that: The switching device is a driving cylinder group, including a displacement cylinder for lateral movement close to the fixture base, a clamping cylinder for clamping the C-shaped bracket, a separating cylinder for vertical movement of the C-shaped bracket to disengage and cooperate with the positioning boss, and a flipping cylinder for placing the C-shaped bracket in the assembly. An auxiliary positioning cylinder is also installed on the work disc, and the auxiliary positioning cylinder includes an auxiliary positioning jaw for clamping the center rod.

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