An automatic assembly device for the torsion spring of a circuit breaker

Abstract

The present invention relates to an automatic assembly device for a circuit breaker torsion spring, including a frame, on which there are: a torsion spring adjustment station with an adjustment surface that can be in contact with and limit the feet on the torsion spring; a torsion spring torsion station with a push tube that can move up and down, a static clamping member fixedly arranged, and a dynamic clamping member that can rotate. The two feet of the torsion spring on the station are respectively abutted against the static clamping member and the dynamic clamping member; a moving module, which includes a torsion spring feeding mechanism A and a torsion spring feeding mechanism B. The feeding mechanism A can be used to feed the adjusted torsion spring on the torsion spring adjustment station into the torsion spring torsion station. The feeding mechanism A has a clamp that can move up and down and a clamping driving member. The clamp includes two relative inner chucks for inserting into the inner hole of the torsion spring; the torsion spring feeding mechanism B can be used to receive and hold the torsion spring that has been twisted open and send it to the target position of the circuit breaker. The feeding mechanism B includes a torsion spring sleeve rod that can move up and down and a stripping tube. The new torsion spring assembly solution is convenient for torsion spring feeding and assembly and has high precision.

Description

Technical Field

[0001] The present invention relates to the field of breaker accessory assembly, and in particular to an automatic assembly device for breaker torsion springs. Background Art

[0002] The handle of a miniature circuit breaker needs to be installed with a torsion spring. In the existing technology, when installing the torsion spring 1', it is usually manually installed on the corresponding torsion spring installation fitting 2'. The torsion spring 1' has a helical coil part 11', and a first leg 12' and a second leg 13' designed one above the other. The torsion spring installation fitting 2' has a central axis column 21', and a clamping block 22' on the outside. Since the torsion spring 1' itself needs to open the two legs of the torsion spring 1' by a certain angle during installation, and then press it into the target position in the open state. The torsion spring 1' is sleeved on the axis column 21', and its two legs respectively abut on both sides of the clamping block 22'. The installation difficulty is relatively large. From the current situation where manual assembly is mostly used on the assembly line, the installation intensity is high, the assembly efficiency is low, and the torsion spring also needs to be pressed into place to ensure that the two legs of the torsion spring reach the target position. There are many cases where the installation is not in place, resulting in a low assembly pass rate.

[0003] In the automatic assembly device for breaker handle torsion spring of CN108321038A proposed by the applicant before, it includes a vacancy detection component, a handle feeding component, a handle detection component, a torsion spring feeding component, a torsion spring detection component, a torsion spring turning component, a torsion spring turning detection component, a workpiece discharging component, a workbench component and a substrate; the vacancy detection component, the handle feeding component, the handle detection component, the torsion spring feeding component, the torsion spring detection component, the torsion spring turning component, the torsion spring turning detection component and the workpiece discharging component are sequentially arranged on the periphery of the workbench component. The automatic assembly of the torsion spring in this patent improves the assembly accuracy, consistency, efficiency and reduces the scrap rate of the product to a certain extent. Through experimental analysis, we found the following problems: First, two sets of manipulators need to be set up. The manipulator on the left is used to grab the torsion spring that has completed the angle adjustment, and the manipulator on the right is used to grab the torsion spring whose angle is to be adjusted. The grasping and releasing operations of the torsion spring are inconvenient, the structure is complex and the cost is high; Second, the transmission structure of the torsion spring turning component is complex, and there is a problem that the two legs of the torsion spring cannot be opened by an effective angle, and the opened torsion spring cannot be stably sleeved on the workpiece. During the operation, the torsion spring is prone to deviation and inconvenient to sleeve. The structure design is relatively complex and the assembly operation is inconvenient. Summary of the Invention

[0004] The object of the present invention: In order to overcome the defects of the prior art, the present invention provides an automatic assembly device for breaker torsion springs. The new torsion spring assembly solution is convenient for torsion spring feeding and assembly, and has high precision.

[0005] The technical solution of the present invention: An automatic assembly device for breaker torsion springs, including a frame, on which there are:

[0006] The torsion spring adjustment station is provided with an adjustment surface that can be in contact with and limit the position of the support feet on the torsion spring.

[0007] The torsion spring twisting station is provided with a push tube that can move up and down, a stationary clamping member fixedly arranged, and a moving clamping member that can rotate. The two support feet of the torsion spring on the station are respectively abutted against the stationary clamping member and the moving clamping member, and when the moving clamping member rotates away from the stationary clamping member, the torsion spring is twisted open, and the push tube pushes out the twisted torsion spring.

[0008] The moving module includes a torsion spring feeding mechanism A and a torsion spring feeding mechanism B.

[0009] The feeding mechanism A can be used to feed the adjusted torsion spring on the torsion spring adjustment station into the torsion spring twisting station. The feeding mechanism A has a clamp that can move up and down, and a clamping driving member. The clamp includes two inner clamping heads for inserting into the inner hole of the torsion spring, and the clamping driving member is used to drive the two inner clamping heads to move relatively closer or farther apart.

[0010] Among them, when the clamp is corresponding to the upper part of the torsion spring adjustment station, the clamp can move downward and insert into the inner hole of the torsion spring on the torsion spring adjustment station. The two inner clamping heads of the clamp move relatively farther apart under the drive of the clamping driving member and abut against the inner ring of the torsion spring, realizing the clamping of the torsion spring by the clamp.

[0011] When the clamp is corresponding to the upper part of the torsion spring twisting station, the two inner clamping heads of the clamp move relatively closer together under the drive of the clamping driving member, realizing the release of the torsion spring by the clamp.

[0012] The torsion spring feeding mechanism B can be used to receive and hold the twisted torsion spring and send it to the target position of the circuit breaker. The feeding mechanism B includes a torsion spring sleeve rod that can move up and down, and a stripping tube. The stripping tube is sleeved outside the torsion spring sleeve rod and can move up and down relative to the sleeve rod. The torsion spring sleeve rod can be sleeved with the torsion spring, and the stripping tube can be in contact with the upper end surface of the torsion spring. The feeding mechanism B also includes a stripping tube driving member for driving the stripping tube to move up and down. The torsion spring sleeve rod is provided with a clamping member for clamping the two support feet of the torsion spring. The clamping member has a first clamping surface for abutting one support foot of the torsion spring and a second clamping surface for abutting the other support foot of the torsion spring.

[0013] Among them, when the torsion spring sleeve rod is corresponding to the upper part of the torsion spring twisting station, the torsion spring foot support surface on the stationary clamping member is flush with or extends beyond the first clamping surface on the clamping member. After the torsion spring foot support surface on the moving clamping member rotates to be flush with or extends beyond the second clamping surface on the clamping member, the torsion spring feeding mechanism B can receive the twisted torsion spring pushed out by the push tube.

[0014] When the torsion spring sleeve rod is above the target position corresponding to the circuit breaker, the first clamping surface and the second clamping surface on the clamping piece are respectively beyond or flush with the corresponding two outer side surfaces of the clamping block on the torsion spring mounting accessory, and the stripping tube can complete the downward stripping of the torsion spring under the drive of the stripping tube driving member.

[0015] Compared with the existing design, the technical solution of the present invention has the following beneficial effects:

[0016] The torsion spring position is adjusted by the torsion spring adjusting station, and the adjusted torsion spring is sent to the torsion spring twisting station by the torsion spring feeding mechanism A. The static clamp and the dynamic clamp of the torsion spring twisting station rotate and cooperate to twist the torsion spring, and then the torsion spring is pushed to the torsion spring feeding mechanism B through the pushing tube. Finally, the torsion spring feeding mechanism B keeps the torsion spring in the posture and sends it to the torsion spring assembly station, which replaces the current manual assembly of torsion springs, can reasonably and effectively realize the fully automatic assembly of torsion springs, and solves the problem that the torsion spring needs to be twisted before it can be installed in the circuit breaker. The scope of application is expanded, the assembly efficiency is significantly improved, and the labor cost is saved.

[0017] Specifically, the adjustment of the torsion spring position is achieved by abutting the adjusting surface against the second leg on the torsion spring, so that the torsion spring can be adjusted to the specified position each time; the clamp is convenient for clamping the torsion spring, the clamp can move downward and be inserted into the inner hole of the torsion spring on the torsion spring adjustment station, and the two inner clamps of the clamp are relatively separated and abutted against the inner ring of the torsion spring under the driving of the clamping drive member, so that the clamp clamps the torsion spring, and the two inner clamps of the clamp are relatively close to each other to loosen the torsion spring; when the torsion spring is twisted, the torsion spring sleeve rod corresponds to the upper part of the torsion spring twisting station, the torsion spring sleeve rod corresponds to the torsion spring sleeve column, and the torsion spring foot support surface on the static clamp corresponds to The first clamping surface on the clamping part is kept flush or exceeds the first clamping surface, and then the movable clamping part is driven by the rotating driving part to rotate the movable clamping part away from the static clamping part to twist the torsion spring, so that the torsion spring foot support surface on the movable clamping part can be rotated to be flush with or exceeds the second clamping surface on the clamping part. The pushing tube pushes the twisted torsion spring upward to make it clamped on the torsion spring sleeve rod, and the torsion spring foot support surfaces of the static clamping part and the movable clamping part are kept flush with or exceeds the clamping surface on the clamping part, so that the two legs of the torsion spring are clamped on the two side surfaces of the clamping part; the stripping tube contacts the upper end surface of the torsion spring, so that it is convenient for it to move downward to strip the torsion spring.

[0018] Preferably, the frame also has a torsion spring assembly station, which has a workpiece cavity for placing torsion spring installation accessories. The torsion spring feeding mechanism B is used to feed the torsion spring that has been twisted at the torsion spring twisting station into the torsion spring assembly station.

[0019] The mobile module also includes a main driving member A that can drive the torsion spring feeding mechanism A and the torsion spring feeding mechanism B to simultaneously lift and lower, and a main driving member B that can drive the torsion spring feeding mechanism A and the torsion spring feeding mechanism B to shift in the station distribution direction. A torsion spring assembly station is set, and the torsion spring feeding mechanism A and the torsion spring feeding mechanism B are lifted and lowered simultaneously by the operation of the main driving member A, and the torsion spring feeding mechanism A and the torsion spring feeding mechanism B are simultaneously shifted and transported in the station distribution direction by the operation of the main driving member B, and just when the torsion spring feeding mechanism A moves to the torsion spring twisting station to realize torsion spring feeding, which is convenient for torsion spring twisting, the torsion spring feeding mechanism B moves to the torsion spring assembly station to realize torsion spring feeding, which is convenient for torsion spring assembly, and each station can operate simultaneously, with high efficiency.

[0020] Preferably, the clamp is provided with a pressing piece, which can float up and down relative to the clamp and is pressed by an elastic piece located above it. The pressing piece can press against the upper end surface of the torsion spring installed on the clamp to prevent it from swinging upward and deviating. The pressing piece is an annular pressing tube or a plurality of pressing blocks. The pressing piece is convenient for pressing the upper end of the torsion spring, which can effectively prevent one side of the torsion spring from swinging upward and deviating.

[0021] Preferably, the two pressing blocks are symmetrically arranged and connected via a connecting block, and the connecting block is inserted between the two inner clamps, so that the assembly is convenient and the pressing effect is good.

[0022] Preferably, the torsion spring adjustment station has a limiting surface that contacts and limits the outer periphery of the spiral coil of the torsion spring, and the limiting surface is arranged in an arc shape and connected with the adjustment surface to form a corner. The spiral coil of the torsion spring contacts the limiting surface, and the support foot contacts the adjustment surface. The formation of the corner can effectively position the torsion spring and prevent it from rotating and deviating.

[0023] Preferably, the adjustment surface contacts the second leg on the torsion spring, and the torsion spring adjustment station also has an auxiliary adjustment block that contacts and limits the first leg on the torsion spring, and there is a passageway between the auxiliary adjustment block and the torsion spring adjustment station for the second leg to pass through. The auxiliary adjustment block can also be used to contact and position the second leg, and multiple positions are positioned, so the torsion spring positioning effect is good.

[0024] Preferably, the pushing tube has a notch on one side corresponding to the clamping part for the two legs of the torsion spring to extend out. The notch extends circumferentially on the pushing tube to allow one leg of the torsion spring to move circumferentially. The notch also allows the clamping part to be relatively inserted. There is a torsion spring sleeve column in the pushing tube. The pushing tube moves up and down relative to the torsion spring sleeve column. The torsion spring is located between the torsion spring sleeve column and the pushing tube. The inner circle of the pushing tube also has a supporting table surface for supporting the bottom surface of the torsion spring. The outer diameter of the torsion spring sleeve column is greater than or equal to the outer diameter of the torsion spring sleeve rod. One side of the stripping tube has an avoidance opening for the clamping part. The structure is simple. The setting of the notch on the pushing tube, on the one hand, facilitates the extension of the two legs and the circumferential movement of one leg, and on the other hand, also allows the clamping part to be relatively inserted, facilitating its downward docking with the static clamping part and the dynamic clamping part; the torsion spring sleeve column facilitates the sleeving and positioning of the torsion spring. The pushing tube located on its outer circumference can drive the torsion spring upward through the supporting table surface provided on the inner circle; the outer diameter of the torsion spring sleeve column is greater than or equal to the outer diameter of the torsion spring sleeve rod, facilitating the pushing of the torsion spring on the torsion spring sleeve column onto the torsion spring sleeve rod; since the clamping part is connected to the torsion spring sleeve rod in the stripping tube, the setting of the notch on the stripping tube can perfectly avoid the clamping part, facilitating its up and down movement.

[0025] Preferably, the dynamic clamping part and the static clamping part are located in the circumferential direction of the torsion spring. There is also a dynamic clamping part rotation driving part and a transmission wheel rotatably arranged at the torsion position of the torsion spring. The dynamic clamping part is arranged on the outer circumference of the transmission wheel. The transmission wheel is directly or indirectly driven by the dynamic clamping part rotation driving part. The dynamic clamping part is driven by the dynamic clamping part rotation driving part to rotate around the torsion spring sleeve column.

[0026] Preferably, the device is also provided with a torsion spring feeding mechanism, which has a material tray and a conveying track for supplying the torsion spring to the torsion spring adjustment station. The adjustment surface faces the outlet of the conveying track. The torsion spring is fed by the torsion spring feeding mechanism to the torsion spring adjustment station, and the position of the output torsion spring is adjusted by the adjustment surface.

[0027] Preferably, the frame has multiple assembly production lines. Each assembly production line includes a torsion spring adjustment station, a torsion spring torsion station, and a torsion spring assembly station arranged in sequence. Multiple conveying tracks are also correspondingly arranged. One material tray can supply materials for multiple conveying tracks. Each assembly production line is equipped with a moving module. One dynamic clamping part rotation driving part is in gear transmission with multiple dynamic clamping parts. There is also a pushing tube driving part on the torsion spring torsion station that can drive multiple pushing tubes to lift and lower synchronously. The processing efficiency of multiple assembly production lines is high, and one material tray, one dynamic clamping part rotation driving part, and one pushing tube driving part can be shared, saving costs. Description of the Drawings

[0028] Figure 1 It is a structural diagram of the background technology of the present invention;

[0029] Figure 2 It is a structural diagram of the specific embodiment of the present invention;

[0030] Figure 3 Structural diagram of the working station in the specific embodiment of the present invention;

[0031] Figure 4 Structural diagram of the torsion spring adjustment working station in the specific embodiment of the present invention;

[0032] Figure 5 is Figure 4 Partial enlarged view of part A in

[0033] Figure 6 Structural diagram of the torsion spring torsion working station in the specific embodiment of the present invention;

[0034] Figure 7 Structural diagram of the torsion spring torsion working station in the specific embodiment of the present invention;

[0035] Figure 8 Structural diagram of the torsion spring torsion working station in the specific embodiment of the present invention;

[0036] Figure 9 Structural diagram of the static clamping part and the dynamic clamping part in the specific embodiment of the present invention;

[0037] Figure 10 Structural diagram of the pushing pipe in the specific embodiment of the present invention;

[0038] Figure 11 Structural diagram of the torsion spring assembly working station in the specific embodiment of the present invention;

[0039] Figure 12 Structural diagram of the moving module in the specific embodiment of the present invention;

[0040] Figure 13 Structural diagram of the torsion spring feeding mechanism A in the specific embodiment of the present invention;

[0041] Figure 14 Structural diagram of the fixture in the specific embodiment of the present invention;

[0042] Figure 15 Structural diagram of the pressing part in the specific embodiment of the present invention;

[0043] Figure 16 Structural diagram of the torsion spring feeding mechanism B in the specific embodiment of the present invention;

[0044] Figure 17 Assembly drawing of the torsion spring sleeve rod and the stripping pipe in the specific embodiment of the present invention;

[0045] Figure 18 Assembly drawing of the torsion spring sleeve rod and the stripping pipe in the specific embodiment of the present invention;

[0046] Figure 19 Structural diagram of the torsion spring sleeve rod in the specific embodiment of the present invention.

[0047] In the figure: torsion spring 1', helical coil part 11', first leg 12', second leg 13', torsion spring mounting fitting 2', shaft column 21', clamping block 22';

[0048] frame 1, torsion spring adjustment station a, adjustment surface 21, torsion spring torsion station b, push tube 31, static clamping part 32, moving clamping part 33, torsion spring assembly station c, workpiece cavity 41, moving module d, torsion spring feeding mechanism A 5, torsion spring feeding mechanism B 6, fixture 51, clamping drive part 52, inner chuck 511, torsion spring sleeve rod 61, stripping tube 62, stripping tube drive part 63, clamping part 64, first clamping surface 641, second clamping surface 642, static clamping part torsion spring leg support surface 321, moving clamping part torsion spring leg support surface 331, main drive part A 71, main drive part B 72, pressing part 53, pressing block 531, connecting block 532, limiting surface 22, corner 23, auxiliary adjustment block 24, leg contact surface 241, access opening 25, notch 311, torsion spring sleeve column 34, support table surface 312, avoidance opening 621, spring coil pressing surface 622, leg pressing surface 623, moving clamping part rotation drive part 35, transmission wheel 36, torsion spring feeding mechanism 8, material tray 81, conveying track 82, driving gear 91, push tube drive part 37, connecting frame 38. Detailed implementation mode

[0049] Next, the technical solutions in this embodiment will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0050] As Figure 2-19 shown, an automatic torsion spring assembly device for a circuit breaker of the present invention includes a frame 1, and the frame 1 has:

[0051] a torsion spring adjustment station a, which has an adjustment surface 21 that can be in contact with and limit the legs on the torsion spring;

[0052] a torsion spring torsion station b, which has a push tube 31 that can move up and down, a fixed static clamping part 32, and a rotatable moving clamping part 33. The two legs of the torsion spring on the station are respectively abutted against the static clamping part 32 and the moving clamping part 33, and when the moving clamping part 33 rotates away from the static clamping part 32, the torsion spring is twisted open, and the push tube 31 pushes out the twisted torsion spring;

[0053] a torsion spring assembly station c, which has a workpiece cavity 41 for placing the torsion spring mounting fitting, and the inner wall of the workpiece cavity here matches the torsion spring mounting fitting.

[0054] The moving module d includes a torsion spring feeding mechanism A 5 and a torsion spring feeding mechanism B 6.

[0055] The feeding mechanism A 5 can feed the torsion spring adjusted at the torsion spring adjustment station a into the torsion spring twisting station b. The feeding mechanism A 5 has a clamp 51 that can move up and down, and a clamping driving member 52. The clamping driving member 52 can be a jaw cylinder or an oil cylinder. The clamp 51 includes two inner chucks 511 for inserting into the inner hole of the torsion spring. The clamping driving member 52 is used to drive the two inner chucks 511 to move closer to or away from each other.

[0056] Among them, when the clamp 51 is corresponding to the upper part of the torsion spring adjustment station a, the clamp 51 can move downward and insert into the inner hole of the torsion spring at the torsion spring adjustment station a. The two inner chucks 511 of the clamp 51 move away from each other under the drive of the clamping driving member 52 and abut against the inner ring of the torsion spring, realizing the clamping of the torsion spring by the clamp 51.

[0057] When the clamp 51 is corresponding to the upper part of the torsion spring twisting station b, the two inner chucks 511 of the clamp 51 move closer to each other under the drive of the clamping driving member 52, realizing the release of the torsion spring by the clamp 51.

[0058] The torsion spring feeding mechanism B 6 can be used to receive and hold the untwisted torsion spring and send it to the target position of the circuit breaker (i.e., on the torsion spring mounting fitting 2') at the torsion spring assembly station. The feeding mechanism B 6 includes a torsion spring sleeve rod 61 that can move up and down, and a stripping tube 62. The stripping tube 62 is sleeved outside the torsion spring sleeve rod 61 and can move up and down relative to the sleeve rod 61. The torsion spring sleeve rod 61 can be sleeved with a torsion spring. The stripping tube 62 can abut against the upper end surface of the torsion spring. The feeding mechanism B 6 also includes a stripping tube driving member 63 for driving the stripping tube 62 to move up and down. The stripping tube driving member 63 is a cylinder or an oil cylinder directly driving the stripping tube 62 to move up and down, or a motor driving the lifting through a nut-screw structure. The torsion spring sleeve rod 61 is provided with a clamping member 64 for clamping the two legs of the torsion spring. The clamping member can be integrally formed or separately arranged. The clamping member 64 has a first clamping surface 641 for abutting one leg of the torsion spring and a second clamping surface 642 for abutting the other leg of the torsion spring. The clamping member is fixed or integrally arranged with the torsion spring sleeve rod 61. The clamping member can also be sleeved outside the torsion spring sleeve rod 61 through a connecting sleeve. The connecting sleeve is detachable for replacement, so as to replace the clamping member with different angles between the two clamping surfaces to meet the subsequent different installation requirements of the torsion spring.

[0059] Among them, when the torsion spring sleeve rod 61 is above the torsion spring torsion station b, the torsion spring foot support surface 321 on the static clamping member 32 remains flush with or extends beyond the first clamping surface 641 on the clamping member 64. After the torsion spring foot support surface 331 on the moving clamping member 33 rotates to be flush with or extend beyond the second clamping surface 642 on the clamping member 64, the torsion spring feeding mechanism B 6 can receive the torsion spring pushed and twisted out by the pushing tube 31;

[0060] When the torsion spring sleeve rod 61 is above the torsion spring assembly station, the first clamping surface 641 and the second clamping surface 642 on the clamping member 64 respectively extend beyond or are flush with the corresponding two outer side surfaces of the clamping block on the torsion spring installation fitting. The stripping tube 62 can complete the downward stripping of the torsion spring under the drive of the stripping tube drive member 63;

[0061] The moving module d further includes a main drive member A 71 that can drive the torsion spring feeding mechanism A 5 and the torsion spring feeding mechanism B 6 to perform simultaneous lifting and lowering actions, and a main drive member B 72 that can drive the torsion spring feeding mechanism A 5 and the torsion spring feeding mechanism B 6 to displace in the station distribution direction. The main drive member can be directly driven by a cylinder or an oil cylinder, or indirectly driven by a motor through a screw nut structure, a pulley group structure or other transmission structures. The foregoing transmission structures are prior arts and will not be introduced in detail here;

[0062] Specifically, the torsion spring adjustment station a, the torsion spring torsion station b and the torsion spring assembly station are sequentially distributed in the length direction of the frame 1. The main drive member B 72 drives the torsion spring feeding mechanism A 5 and the torsion spring feeding mechanism B 6 to perform synchronous sliding movements in the length direction of the frame 1. Of course, the torsion spring adjustment station a, the torsion spring torsion station b and the torsion spring assembly station can also be annularly distributed;

[0063] Specifically, a pressing member 53 is provided on the fixture 51. The pressing member 53 can float up and down relative to the fixture 51 and is abutted by an elastic member located above it. The elastic member can be a spring or an elastic sheet. The pressing member 53 can abut against the upper end surface of the helical coil part of the torsion spring to prevent it from swinging upwards and deviating. The pressing member 53 is an annular pressing tube or a plurality of pressing blocks 531.

[0064] Specifically, two pressing blocks 531 are symmetrically arranged and integrally connected by a connecting block 532. The connecting block 531 is arranged between the two inner chucks 511. The pressing block 531 can be slidably matched with the guide block through a vertical guide rod, and the guide block is fixedly connected to the fixture mounting frame.

[0065] Specifically, the torsion spring adjustment station a has a limiting surface 22 that abuts against and limits the outer circumference of the helical coil part of the torsion spring. The limiting surface 22 is arc-shaped and forms a corner 23 at the connection with the adjusting surface 21. This corner 23 is adapted to the bending part of the helical coil part of the torsion spring and its extending support leg;

[0066] Specifically, the adjustment surface 21 abuts against the second leg of the torsion spring. An auxiliary adjustment block 24 for abutting and limiting the first leg of the torsion spring is further provided at the torsion spring adjustment station a. The leg abutting surface 241 on the auxiliary adjustment block 24 is inclined. A passage opening 25 for the second leg to pass through is provided between the auxiliary adjustment block 24 and the torsion spring adjustment station a.

[0067] Specifically, the pushing tube 31 has a notch 311 for the two legs of the torsion spring to extend out on the side corresponding to the clamping part. The notch 311 extends in the circumferential direction of the pushing tube 31 to allow one leg of the torsion spring to move circumferentially. The notch 311 can also allow the clamping part 64 to be inserted relatively. A torsion spring sleeve column 34 is provided in the pushing tube 31. The pushing tube 31 moves up and down relative to the torsion spring sleeve column 34. The torsion spring is located between the torsion spring sleeve column 34 and the pushing tube 31. The inner circle of the pushing tube 31 also has a support table surface 312 for supporting the bottom surface of the torsion spring. The outer diameter of the torsion spring sleeve column 34 is greater than or equal to the outer diameter of the torsion spring sleeve rod 61. One side of the stripping tube 62 has an avoidance opening 621 for avoiding the clamping part 64, which facilitates the up and down movement of the stripping tube 62 on the torsion spring sleeve rod 61 without being interfered by the clamping part 64. The bottom surface of the stripping tube 62 also has a spring coil pressing surface 622 abutting against the upper end surface of the helical coil part of the torsion spring, and a leg pressing surface 623 abutting against the upper end surfaces of the two legs of the torsion spring.

[0068] Specifically, the movable clamping part 33 and the static clamping part 32 are located in the circumferential direction of the torsion spring. A movable clamping part rotation driving part 35 and a transmission wheel 36 rotatably arranged are further provided at the torsion spring torsion station b. The movable clamping part 33 is arranged on the outer circumference of the transmission wheel 36, deviating from its central position. The transmission wheel 36 is directly or indirectly driven by the movable clamping part rotation driving part, and the transmission wheel 36 is in gear transmission with the movable clamping part rotation driving part.

[0069] Specifically, the device is also provided with a torsion spring feeding mechanism 8, which has a material tray 81 and a conveying track 82 for supplying the torsion spring to the torsion spring adjustment station a. The adjustment surface 21 faces the outlet of the conveying track 81, and the conveying track 82 can be a conveyor belt.

[0070] Specifically, the rack 1 has multiple assembly production lines. Each assembly production line includes a torsion spring adjustment station a, a torsion spring torsion station b, and a torsion spring assembly station c arranged in sequence. Multiple conveying tracks 82 are also correspondingly provided. One material tray 81 can supply materials for multiple conveying tracks 82.

[0071] Of course, it can also be multiple material trays 81 to supply materials for the conveying tracks 82 respectively.

[0072] Each assembly line is equipped with a moving module d. A driving member 35 for rotating the moving clamping member is in gear transmission with a plurality of moving clamping members 33. Here, the gear transmission structure has a driving gear 91 connected to the output shaft of the driving member 35 for rotating the moving clamping member. The outer periphery of the transmission wheel 36 that drives the moving clamping member 33 to rotate has saw teeth. The driving gear 91 is directly or indirectly engaged with the transmission wheel 36, or adjacent transmission wheels 36 can be directly or indirectly engaged.

[0073] Of course, it can also be a plurality of driving members 35 for rotating the moving clamping members to independently drive each of the moving clamping members 33 respectively.

[0074] On the torsion spring torsion station b, there is also a driving member 37 for the push tube 31 that can drive a plurality of push tubes 31 to lift and lower synchronously. The plurality of push tubes 31 are connected by a connecting frame 38, and the output shaft of the driving member 37 for the push tube is connected to the connecting frame 38.

[0075] Of course, it can also be a plurality of driving members 37 for the push tube to independently drive each push tube 31 respectively.

[0076] Working principle:

[0077] During the operation of adjusting the torsion spring, the torsion spring is fed through the torsion spring feeding mechanism 8, and the conveying track 82 realizes the output of the torsion spring. When the torsion spring is conveyed to the torsion spring adjusting station a, the adjusting surface 21 abuts against the second leg of the torsion spring, the limiting surface 22 abuts against the helical coil part of the torsion spring, and the first leg of the torsion spring abuts against the auxiliary adjusting block, so as to realize the adjustment of the position of the torsion spring, so that each torsion spring can be adjusted to the specified position every time.

[0078] The fixture 51 corresponds to the upper part of the torsion spring adjusting station a, and then operates through the moving module d. The fixture 51 can move downward and insert into the inner hole of the torsion spring at the torsion spring adjusting station a. At this time, the two pressing blocks 531 abut against the upper end surface of the helical coil part of the torsion spring. The two inner clamping heads 511 of the fixture 51 move relatively away from each other under the drive of the clamping driving member 52 and abut against the inner ring of the torsion spring, so as to realize the clamping of the torsion spring by the fixture 51. Then, the feeding mechanism A5 moves to send the adjusted torsion spring at the torsion spring adjusting station a into the torsion spring torsion station b. When the fixture 51 corresponds to the upper part of the torsion spring torsion station b, the two inner clamping heads 511 of the fixture 51 move relatively closer under the drive of the clamping driving member 52, so as to realize the loosening of the torsion spring by the fixture 51. At this time, the torsion spring falls between the push tube 31 and the torsion spring sleeve column 34 at the torsion spring torsion station b, and one leg contacts the static clamping member, and the other leg contacts the moving clamping member.

[0079] When the torsion spring is being untwisted, the torsion spring sleeve rod 61 is positioned above the torsion spring twisting station b, corresponding to the torsion spring sleeve column 34. The torsion spring foot support surface 321 on the static clamping member 32 remains flush with or extends beyond the first clamping surface 641 on the clamping member 64. Then, when the moving clamping member rotating drive member 35 drives the moving clamping member 33 to rotate away from the static clamping member 32 to untwist the torsion spring, after the torsion spring foot support surface 331 on the moving clamping member 33 rotates to be flush with or extend beyond the second clamping surface 642 on the clamping member 64, at this time, both the torsion spring foot support surfaces of the static clamping member 32 and the moving clamping member 33 remain flush with or extend beyond the clamping surface on the clamping member 64. The push tube drive member 37 is used to drive the push tube 31 to push the untwisted torsion spring upward. The torsion spring feeding mechanism B 6 can receive the untwisted torsion spring pushed out by the push tube 31. The torsion spring sleeve rod 61 is for sleeving the torsion spring, and the stripping tube 62 abuts against the upper end surface of the torsion spring. The torsion spring is sent to the target position (i.e., on the torsion spring installation fitting) of the circuit breaker at the torsion spring assembly station by moving the torsion spring feeding mechanism B 6;

[0080] When the torsion spring is being assembled, the torsion spring sleeve rod 61 is above the torsion spring assembly station. The first clamping surface 641 and the second clamping surface 642 on the clamping member 64 respectively extend beyond or are flush with the corresponding two outer side surfaces of the clamping block on the torsion spring installation fitting. The stripping tube 62 can complete the downward stripping of the torsion spring under the drive of the stripping tube drive member 63, so that the torsion spring is clamped on the torsion spring installation fitting to complete the assembly.

[0081] The torsion spring is fed from the torsion spring feeding mechanism to the torsion spring adjustment station, the position of the torsion spring is adjusted at the torsion spring adjustment station, the adjusted torsion spring is sent to the torsion spring twisting station by the torsion spring feeding mechanism A, the static clamping member and the moving clamping member at the torsion spring twisting station rotate in cooperation to untwist the torsion spring, then it is pushed to the torsion spring feeding mechanism B by the push tube, and finally the torsion spring feeding mechanism B sends the torsion spring to the torsion spring assembly station while maintaining the posture of the torsion spring, replacing the current manual assembly of the torsion spring. It can reasonably and effectively achieve the full-automatic assembly of the torsion spring, and solve the problem that the torsion spring needs to be untwisted before it can be installed in the circuit breaker. The scope of application is expanded, the assembly efficiency is significantly improved, and the labor cost is saved.

[0082] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back...) are only used to explain the relative position relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indication will also change accordingly.

[0083] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In the description of the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "coupled", "connected", "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An automatic assembly device for the torsion spring of a circuit breaker, characterized in that: It includes a frame, on which there are: A torsion spring adjustment station, on which there is an adjustment surface that can be in contact with and limit the feet on the torsion spring; A torsion spring torsion station, on which there is a push tube that can move up and down, a fixed static clamping part, and a rotatable dynamic clamping part. The two feet of the torsion spring on the station are respectively abutted against the static clamping part and the dynamic clamping part, and when the dynamic clamping part rotates away from the static clamping part, the torsion spring is twisted open, and the push tube pushes out the twisted open torsion spring; A moving module, which includes a torsion spring feeding mechanism A and a torsion spring feeding mechanism B; The feeding mechanism A can be used to feed the adjusted torsion spring on the torsion spring adjustment station into the torsion spring torsion station. The feeding mechanism A has a clamp that can move up and down, and a clamping driving part. The clamp includes two inner clamping heads for inserting into the inner hole of the torsion spring, and the clamping driving part is used to drive the two inner clamping heads to move relatively closer or farther apart; Among them, when the clamp is corresponding to the upper part of the torsion spring adjustment station, the clamp can move downward and insert into the inner hole of the torsion spring on the torsion spring adjustment station. The two inner clamping heads of the clamp move relatively farther apart under the drive of the clamping driving part and abut against the inner ring of the torsion spring to realize the clamping of the torsion spring by the clamp; When the clamp is corresponding to the upper part of the torsion spring torsion station, the two inner clamping heads of the clamp move relatively closer together under the drive of the clamping driving part to realize the release of the torsion spring by the clamp; The torsion spring feeding mechanism B can be used to receive and hold the twisted open torsion spring and send it to the target position of the circuit breaker. The feeding mechanism B includes a torsion spring sleeve rod that can move up and down, and a stripping tube. The stripping tube is sleeved on the torsion spring sleeve rod and can move up and down relative to the sleeve rod. The torsion spring sleeve rod can be sleeved with the torsion spring, and the stripping tube can be in contact with the upper end surface of the torsion spring. The feeding mechanism B also includes a stripping tube driving part for driving the stripping tube to move up and down. The torsion spring sleeve rod is provided with a clamping part for the two feet of the torsion spring to be clamped. The clamping part has a first clamping surface for one foot of the torsion spring to abut against and a second clamping surface for the other foot of the torsion spring to abut against; Among them, when the torsion spring sleeve rod is corresponding to the upper part of the torsion spring torsion station, the torsion spring foot support surface on the static clamping part is flush with or exceeds the first clamping surface on the clamping part. After the torsion spring foot support surface on the dynamic clamping part rotates to be flush with or exceed the second clamping surface on the clamping part, the torsion spring feeding mechanism B can receive the twisted open torsion spring pushed out by the push tube; When the torsion spring sleeve rod is corresponding to the upper part of the target position of the circuit breaker, the first clamping surface and the second clamping surface on the clamping part respectively exceed or are flush with the corresponding two outer side surfaces of the clamping block on the torsion spring installation fitting, and the stripping tube can complete the downward stripping of the torsion spring under the drive of the stripping tube driving part; The torsion spring adjustment station is provided with a limiting surface that is in contact with and limits the outer circumference of the spiral coil part of the torsion spring. The limiting surface is arc-shaped and forms a corner with the adjustment surface; The device is also provided with a torsion spring feeding mechanism, which has a tray and a conveying track for supplying the torsion spring to the torsion spring adjustment station. The adjustment surface faces the outlet of the conveying track; 2. The automatic assembly device for the breaker torsion spring according to claim 1, wherein: There is also a torsion spring assembly station, on which there is a workpiece cavity for placing the torsion spring installation fitting. The torsion spring feeding mechanism B is used to feed the twisted open torsion spring on the torsion spring torsion station into the torsion spring assembly station. The described moving module further includes a main driving member A that can drive the torsion spring feeding mechanism A and the torsion spring feeding mechanism B to perform lifting actions simultaneously, and a main driving member B that can drive the torsion spring feeding mechanism A and the torsion spring feeding mechanism B to displace in the working station distribution direction.

3. The automatic assembly device for the breaker torsion spring according to claim 1 or 2, characterized in that: The fixture may also be provided with a pressing member. The pressing member can float up and down relative to the fixture and can be pressed by an elastic member located above it. The pressing member can abut against the upper end surface of the torsion spring installed on the fixture to prevent it from swinging upward and shifting. The pressing member is an annular pressing tube or a plurality of pressing blocks.

4. The automatic assembling device for the torsion spring of the circuit breaker according to claim 3, characterized in that: The two pressing blocks are symmetrically arranged and are connected by a connecting block. The connecting block is arranged between the two inner chucks.

5. The automatic assembling device for the torsion spring of the circuit breaker according to claim 1 or 2, characterized in that: The adjustment surface abuts against the second leg of the torsion spring. The torsion spring adjustment station also has an auxiliary adjustment block that abuts against and limits the first leg of the torsion spring. There is a passage for the second leg to pass through between the auxiliary adjustment block and the torsion spring adjustment station.

6. The automatic assembly device for the breaker torsion spring according to claim 1 or 2, characterized in that: The pushing tube has a notch on the side corresponding to the clamping member for the two legs of the torsion spring to extend out. The notch extends in the circumferential direction of the pushing tube to allow one leg of the torsion spring to move circumferentially. The notch can also allow the clamping member to be inserted relatively. There is a torsion spring sleeve column in the pushing tube. The pushing tube moves up and down relative to the torsion spring sleeve column. The torsion spring is located between the torsion spring sleeve column and the pushing tube. The inner circle of the pushing tube also has a supporting table surface for supporting the bottom surface of the torsion spring. The outer diameter of the torsion spring sleeve column is greater than or equal to the outer diameter of the torsion spring sleeve rod. One side of the stripping tube has an avoidance opening for the clamping member.

7. The automatic assembly device for the torsion spring of the circuit breaker according to claim 1 or 2, characterized in that: The moving clamping member and the static clamping member are located in the circumferential orientation of the torsion spring. The torsion spring twisting station is also provided with a moving clamping member rotation driving member and a transmission wheel is rotatably arranged. The moving clamping member is arranged on the outer circumference of the transmission wheel. The transmission wheel is directly or indirectly driven by the moving clamping member rotation driving member.

8. The automatic assembly device for the breaker torsion spring according to claim 1 or 2, characterized in that: The frame has multiple assembly production lines. Each assembly production line includes a torsion spring adjustment station, a torsion spring twisting station, and a torsion spring assembly station that are sequentially distributed. Multiple conveying tracks are also correspondingly arranged. One material tray can supply materials for multiple conveying tracks. Each assembly production line is equipped with a moving module. One moving clamping member rotation driving member is in gear transmission with multiple moving clamping members. The torsion spring twisting station also has a pushing tube driving member that can drive multiple pushing tubes to lift synchronously.

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