Large-torque nut tightening equipment

Abstract

According to the technical scheme, the large-torque nut tightening equipment is characterized by comprising a positioning mechanism; the tightening mechanism is arranged above the positioning mechanism and can move up and down above the positioning mechanism; the tightening mechanism comprises a tightening motor, and the tightening motor is a servo motor; the speed reducer is fixedly connected to the bottom of the tightening motor and is in transmission connection with the output end of the tightening motor; the tightening tool is matched with the round nut and is in transmission connection with an output shaft of the speed reducer; the torsion sensor is arranged at an output shaft of the speed reducer so as to detect torsion output by the output shaft of the speed reducer; and through the arrangement of the torsion sensor, the torque applied to the round nut can be accurately controlled, and therefore the problem that locking is not conducted or the torque is too large is not prone to occurring.

Description

Technical Field

[0001] The present invention relates to the technical field of nut tightening, and more particularly to a large torque nut tightening device. Background Art

[0002] Travel reducers are widely used in various engineering machines in the large-scale engineering machinery industry. In the internal structure of the travel reducer, the axial locking method of the two tapered roller bearings is set to round nut locking, which requires precise control of the locking torque to ensure the axial clearance of the two tapered roller bearings and meet the performance requirements of the product.

[0003] In the current assembly process of travel reducers, the round nuts are mostly tightened manually. However, this installation method not only has the problem of low installation efficiency, but also cannot control the installation torque of the round nut, which easily leads to the problem that the round nut is not tightened or the tightening torque of the round nut is too large and the thread is damaged. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high-torque nut tightening device, which can accurately control the torque applied to the round nut through the setting of a torque sensor, thereby reducing the problem of unlocking or excessive torque.

[0005] To achieve the above object, the present invention provides the following technical solutions: a high-torque nut tightening device, comprising a positioning mechanism, the positioning mechanism is used to position the reduction motor housing and ensure that the round nut on the positioned reduction motor housing faces upward; and a tightening mechanism, the tightening mechanism being arranged above the positioning mechanism and being able to move up and down above the positioning mechanism; The tightening mechanism comprises a tightening motor, and the tightening motor is configured as a servo motor; A reducer, the reducer is fixedly connected to the bottom of the tightening motor and is drivingly connected to the output end of the tightening motor; A tightening tool, the tightening tool cooperates with the round nut and is drivingly connected to the output shaft of the reducer; and a torque sensor, wherein the torque sensor is arranged at the output shaft of the reducer to detect the torque output by the output shaft of the reducer.

[0006] The present invention is further configured as follows: the positioning mechanism comprises a tray, and the tray is arranged horizontally; A supporting plate, wherein the supporting plates are arranged on the top of the tray and are arranged in two opposite positions; and a limit plate, a side where the tops of the two support plates are away from each other; The top of the reduction motor housing is open, the nut is located at the bottom of the inner cavity of the reduction motor housing, and a mounting ring is fixedly connected to the outer side of the bottom of the reduction motor housing. The mounting ring is supported on two support plates and the outer side of the mounting ring is in contact with the side of the two limit plates close to each other.

[0007] The present invention is further configured to include: a transmission mechanism, wherein the transmission mechanism is used to transmit the pallet in a horizontal direction and drive the pallet to pass through the tightening mechanism and be lowered; and a lifting mechanism, wherein the lifting mechanism is arranged below the tightening mechanism to lift the pallet upward when the pallet moves below the tightening mechanism.

[0008] The present invention is further configured as follows: the lifting mechanism comprises a base; A support plate, the support plate is arranged above the base, and the support plate is driven by a cylinder arranged on the base to move up and down; And positioning pins, which are fixedly connected to the top of the support plate and are provided with at least two positioning pins, and the pallet is provided with multiple positioning holes corresponding to the multiple positioning pins respectively. When the pallet lifts the pallet upward, the positioning pins are inserted into the corresponding positioning holes and cooperate with the positioning holes.

[0009] The present invention is further configured as follows: the lifting mechanism further comprises a mounting plate, the mounting plate is fixedly connected above the base, and a plurality of guide seats vertically penetrating the mounting plate are fixedly connected to the mounting plate; And a reaction shaft, each guide seat is correspondingly provided with a reaction shaft, the reaction shaft is fixedly connected to the bottom of the support plate and vertically passes through the guide seat.

[0010] The present invention is further configured to include: a bracket, wherein the bracket is mounted on the transmission mechanism; The tightening mechanism also includes a slide saddle, the bracket is provided with a slide rail vertical in the length direction, the slide saddle slides vertically on the slide rail, and the tightening motor and the reducer are fixed on the slide saddle; And a counterweight, wherein a plurality of counterweights are detachably connected to the saddle.

[0011] The present invention is further configured to include: a loading and unloading mechanism, wherein two loading and unloading mechanisms are provided, and the loading and unloading mechanisms are used to realize loading and unloading of the reduction motor housing on the tray; The two ends of the transmission mechanism are set as two loading and unloading stations, the middle position of the transmission mechanism is set as a tightening station, the tightening mechanism is set at the tightening station, and the two loading and unloading mechanisms are respectively set at the two loading and unloading stations; The transmission mechanism is provided with two positioning mechanisms, and the two positioning mechanisms move respectively between the tightening station and the two loading and unloading stations.

[0012] The present invention is further configured as follows: it also includes a feed conveyor belt, wherein two feed conveyor belts are provided, the transmission direction of the feed conveyor belts is arranged along the transmission direction of the transmission mechanism, and the unloading ends of the two feed conveyor belts are respectively arranged at positions close to the two loading and unloading stations; and a discharging conveyor belt, wherein two discharging conveyor belts are provided, the transmission direction of the discharging conveyor belt is horizontal and perpendicular to the transmission direction of the feeding conveyor belt, and the feeding end of the discharging conveyor belt is located between the unloading end of the feeding conveyor belt and the loading and unloading stations; The loading and unloading mechanism is used to drive the reduction motor housing to transfer between the feeding conveyor belt, the discharging conveyor belt and the transmission mechanism.

[0013] The present invention is further configured as follows: the loading and unloading mechanism comprises a sliding plate, which is arranged above the transmission mechanism and can slide in a direction parallel to the conveying direction of the transmission mechanism to achieve sliding between the transmission mechanism, the feeding conveyor belt and the discharging conveyor belt; A lifting seat, which is arranged below the sliding plate and can slide up and down on the sliding plate; And a clamping plate, wherein two clamping plates are provided and arranged at the bottom of the lifting seat, the two clamping plates can slide in the horizontal direction to achieve mutual approach and mutual distance, and the two clamping plates can be separated from each other to be supported on the inner wall of the reduction motor housing.

[0014] The present invention is further configured to include: a fastening mechanism, wherein two fastening mechanisms are provided and are respectively arranged above the transmission mechanism and near both ends; The support plates are provided with two, and the two support plates are respectively located near the two sides of the transmission mechanism, and two threaded holes are provided on the support plates, and through holes corresponding to the threaded holes are provided on the mounting ring outside the reduction motor housing, and the fastening mechanism is used to pass the bolts through the through holes and tighten them on the threaded holes; The fastening mechanism includes two fastening components, and the two fastening components are respectively used to fasten the bolts on the two support plates; The fastening assembly includes a translation plate, which slides above the transmission mechanism in a direction parallel to the transmission direction of the transmission mechanism; A lifting plate, which is arranged below the translation plate and can slide up and down on the translation plate; A fastening motor, wherein the fastening motor is fixedly connected to the bottom of the lifting plate and is provided with two fastening motors, and the two fastening motors correspond to the two threaded holes on the support plate respectively; And a matching block, the output end of each fastening motor is drivingly connected to a matching block, the bottom of the matching block is provided with a hole matching with the bolt head, and the matching block is configured as a magnetic matching block.

[0015] In summary, compared with the prior art, the present invention has the following beneficial effects: the present invention can accurately control the torque applied to the round nut through the provision of a torque sensor, thereby preventing problems of unlocking or excessive torque from occurring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a positioning mechanism, a tightening mechanism and a transmission mechanism of an embodiment; Figure 2 is a schematic diagram of a positioning mechanism of an embodiment; Figure 3 is a schematic diagram of a lifting mechanism of an embodiment; Figure 4 for Figure 1 A magnified schematic diagram of part A; Figure 5 is a schematic diagram of a tightening mechanism of an embodiment; Figure 6 The schematic diagram of the loading and unloading mechanism is shown in the embodiment; Figure 7 for Figure 6 A magnified schematic diagram of part B; Figure 8 is a schematic diagram of a fastening assembly embodying an embodiment; Fig. 9 for Figure 8 Enlarged schematic diagram of part C of FIG.

[0017] In the figure: 1. transmission mechanism; 2. positioning mechanism; 21. tray; 211. positioning hole; 22. support plate; 221. threaded hole; 23. limit plate; 3. tightening mechanism; 31. tightening motor; 32. reducer; 33. tightening tool; 34. slide saddle; 4. lifting mechanism; 41. base; 42. support plate; 421. positioning pin; 43. mounting plate; 431. guide seat; 44. reaction shaft; 5. bracket; 51. slide rail; 6. unloading conveyor belt; 7. feeding conveyor belt; 8. loading and unloading mechanism; 81. sliding plate; 82. lifting seat; 83. clamping plate; 9. fastening assembly; 91. translation plate; 92. lifting plate; 93. fastening motor; 94. matching block; 10. support frame. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0019] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0020] Embodiment: A high torque nut tightening device, see attached Figure 1 -Attached Fig. 9 , including a positioning mechanism 2 and a tightening mechanism 3, wherein the positioning mechanism 2 is used to position the reduction motor housing and ensure that the round nut on the positioned reduction motor housing faces upward; the tightening mechanism 3 is arranged above the positioning mechanism 2 and can move up and down above the positioning mechanism 2; the tightening mechanism 3 includes a tightening motor 31, a reducer 32, a tightening tool 33 and a torque sensor, wherein the tightening motor 31 is arranged as a servo motor; the reducer 32 is fixedly connected to the bottom of the tightening tightening motor 31 and is transmission-connected to the output end of the tightening motor 31; the tightening tool 33 cooperates with the round nut and is transmission-connected to the output shaft of the reducer 32; the torque sensor is arranged at the output shaft of the reducer 32 to detect the torque output by the output shaft of the reducer 32.

[0021] After the reducer housing is positioned by the positioning mechanism 2, the tightening motor 31 drives the tightening tool 33 to tighten the round nut. During the tightening process, the torque sensor can feedback the torque applied to the round nut, so as to obtain the torque applied to the round nut. When the torque applied to the round nut reaches the set value, the tightening operation of the round nut is stopped. This can ensure that the round nut can be tightened without causing the problem of excessive torque.

[0022] Specifically, the positioning mechanism 2 includes a tray 21, a support plate 22 and a limit plate 23, wherein the tray 21 is arranged horizontally; the support plate 22 is arranged on the top of the tray 21 and is arranged as two opposite ones; the tops of the two support plates 22 are on one side away from each other; the top of the reduction motor housing is open, the nut is located at the bottom of the inner cavity of the reduction motor housing, and a mounting ring is fixedly connected to the outer side of the bottom of the reduction motor housing, the mounting ring is supported on the two support plates 22, and the outer side of the mounting ring is in contact with the side of the two limit plates 23 that are close to each other.

[0023] Specifically, this embodiment also includes a transmission mechanism 1 and a lifting mechanism 4, wherein the transmission mechanism 1 is used to transmit the pallet 21 in a horizontal direction and drive the pallet 21 to pass through the tightening mechanism 3 and be lowered; the lifting mechanism 4 is arranged below the tightening mechanism 3 to lift the pallet 21 upward when the pallet 21 moves to below the tightening mechanism 3.

[0024] When the conveying mechanism 1 moves the tray 21 to the point where the tightening mechanism 3 is being lowered, the lifting mechanism 4 lifts up the tray 21 , so that the tray 21 is not easily moved on the conveying mechanism 1 during the tightening process.

[0025] Specifically, the lifting mechanism 4 includes a base 41, a support plate 42 and a positioning pin 421; the support plate 42 is arranged above the base 41, and the support plate 42 is driven by a cylinder arranged on the base 41 to move up and down; the positioning pin 421 is fixedly connected to the top of the support plate 42 and is provided with at least two, and the tray 21 is provided with a plurality of positioning holes 211 corresponding to the plurality of positioning pins 421, respectively. When the support plate 42 lifts the tray 21 upward, the positioning pin 421 is inserted into the corresponding positioning hole 211 and cooperates with the positioning hole 211.

[0026] By providing the positioning pins 421 , the position of the tray 21 can be positioned by the lifting mechanism 4 , and during the process of tightening the bolts, relative movement can occur between the tray 21 and the support plate 42 .

[0027] Specifically, the lifting mechanism 4 also includes a mounting plate 43 and a reaction shaft 44. The mounting plate 43 is fixedly connected above the base 41. A plurality of guide seats 431 vertically penetrating the mounting plate 43 are fixedly connected to the mounting plate 43; each guide seat 431 is correspondingly provided with a reaction shaft 44, and the reaction shaft 44 is fixedly connected to the bottom of the support plate 42 and vertically passes through the guide seat 431.

[0028] Specifically, the transmission mechanism 1 includes a transmission frame and a transmission roller. Two transmission frames are provided and are respectively arranged on both sides of the lifting mechanism 4. The two transmission frames are connected together by a connecting rod at the bottom; a plurality of transmission rollers arranged along the transmission direction of the transmission mechanism 1 are provided on the side where the two transmission frames are close to each other, and the support plate 42 can pass between the two rows of transmission rollers on the two transmission frames.

[0029] Specifically, this embodiment also includes a bracket 5, which is mounted on the transmission mechanism 1; the tightening mechanism 3 also includes a saddle 34 and a counterweight, and the bracket 5 is provided with a vertical slide rail 51 in the length direction, and the saddle 34 slides vertically on the slide rail 51, and the tightening motor 31 and the reducer 32 are fixed on the saddle 34; the saddle 34 is detachably connected to a plurality of counterweights.

[0030] Specifically, the present embodiment also includes a loading and unloading mechanism 8, two of which are provided, and the loading and unloading mechanism 8 is used to realize the loading and unloading of the reduction motor housing on the tray 21; the two ends of the transmission mechanism 1 are set as two loading and unloading stations, the middle position of the transmission mechanism 1 is set as a tightening station, the tightening mechanism 3 is set at the tightening station, and the two loading and unloading mechanisms 8 are respectively set at the two loading and unloading stations; two positioning mechanisms 2 are provided on the transmission mechanism 1, and the two positioning mechanisms 2 move between the tightening station and the two loading and unloading stations respectively.

[0031] By arranging two positioning mechanisms 2 on the transmission mechanism 1, when one of the positioning mechanisms 2 is performing a nut tightening operation at a tightening station, the other positioning mechanism 2 can be moved to the corresponding loading and unloading station to remove the reduction motor housing with the nut tightened and place the reduction motor housing with the nut to be tightened, which greatly improves the work efficiency.

[0032] Specifically, the present embodiment further includes a feed conveyor belt 7 and a discharging conveyor belt 6, wherein two feed conveyor belts 7 are provided, and the transmission direction of the feed conveyor belt 7 is arranged along the transmission direction of the transmission mechanism 1, and the unloading ends of the two feed conveyor belts 7 are respectively arranged at positions close to two loading and unloading stations; wherein two discharging conveyor belts 6 are provided, and the transmission direction of the discharging conveyor belt 6 is horizontal and perpendicular to the transmission direction of the feed conveyor belt 7, and the feed end of the discharging conveyor belt 6 is located between the unloading end of the feed conveyor belt 7 and the loading and unloading station; the loading and unloading mechanism 8 is used to drive the reduction motor housing to transfer between the feed conveyor belt 7, the discharging conveyor belt 6 and the transmission mechanism 1.

[0033] The feeding conveyor belt 7 transports the reduction motor housing with the nut to be tightened to one end close to the transmission mechanism 1, so that the loading and unloading mechanism 8 can transfer the reduction motor housing with the nut to be tightened to the positioning mechanism 2 on the transmission mechanism 1; the setting of the discharging conveyor belt 6 makes it convenient for the loading and unloading mechanism 8 to move the reduction motor housing with the nut already tightened on the transmission mechanism 1 to the end of the discharging mechanism close to the transmission mechanism 1.

[0034] Specifically, the loading and unloading mechanism 8 includes a sliding plate 81, a lifting seat 82 and a clamping plate 83. The sliding plate 81 is arranged above the transmission mechanism 1 and can slide in a direction parallel to the conveying direction of the transmission mechanism 1 to achieve sliding between the transmission mechanism 1, the feed conveyor belt 7 and the discharge conveyor belt 6; the lifting seat 82 is arranged below the sliding plate 81 and can slide up and down on the sliding plate 81; two clamping plates 83 are provided and arranged at the bottom of the lifting seat 82, and the two clamping plates 83 can slide in a horizontal direction to achieve mutual approach and distance, and the two clamping plates 83 can be away from each other to be supported tightly on the inner wall of the reduction motor housing.

[0035] Specifically, this embodiment also includes a support frame 10, and a sliding plate 81 slides on the support frame 10. The sliding of the sliding plate 81 on the support frame 10 is driven by a screw nut, the sliding of the lifting seat 82 on the sliding plate 81 is driven by a cylinder, and the sliding of the two clamping plates 83 on the lifting seat 82 is driven by a cylinder.

[0036] Specifically, the present embodiment further includes a fastening mechanism, two of which are respectively arranged above the transmission mechanism 1 near the two ends; two support plates 22 are respectively arranged, and the two support plates 22 are respectively located near the two sides of the transmission mechanism 1, and two threaded holes 221 are arranged on the support plate 22, and a through hole corresponding to the threaded hole 221 is arranged on the mounting ring outside the reduction motor housing, and the fastening mechanism is used to pass the bolt through the through hole and tighten it on the threaded hole 221; the fastening mechanism includes two fastening components 9, and the two fastening components 9 are respectively used to fasten the bolts on the two support plates 22; the fastening component 9 includes a translation plate 91, A lifting plate 92, a fastening motor 93 and a matching block 94, wherein the translation plate 91 slides above the transmission mechanism 1 in a direction parallel to the transmission direction of the transmission mechanism 1; the lifting plate 92 is arranged below the translation plate 91 and can slide up and down on the translation plate 91; the fastening motor 93 is fixedly connected to the bottom of the lifting plate 92 and is provided with two, and the two fastening motors 93 correspond to the two threaded holes 221 on the support plate 22 respectively; the output end of each fastening motor 93 is drivingly connected to a matching block 94, and the bottom of the matching block 94 is provided with a hole matching with the bolt head, and the matching block 94 is provided as a magnetic matching block 94.

[0037] Fixing the reduction motor housing to the two support plates 22 by bolts can prevent relative displacement between the reduction motor housing and the support plates 22 during the process of tightening the nuts.

[0038] Specifically, the translation plate 91 slides on the support frame 10 , and the sliding of the translation plate 91 on the support frame 10 is driven by the lead screw and nut; the sliding of the lifting plate 92 on the translation plate 91 is driven by the cylinder.

[0039] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A high torque nut tightening device, characterized in that: It comprises a positioning mechanism (2), wherein the positioning mechanism (2) is used to position the housing of the reduction motor and ensure that the round nut on the positioned housing of the reduction motor faces upwards; and a tightening mechanism (3), wherein the tightening mechanism (3) is arranged above the positioning mechanism (2) and is capable of moving up and down above the positioning mechanism (2); The tightening mechanism (3) comprises a tightening motor (31), and the tightening motor (31) is configured as a servo motor; A reducer (32), the reducer (32) being fixedly connected to the bottom of the tightening motor (31) and being drivingly connected to the output end of the tightening motor (31); A tightening tool (33), wherein the tightening tool (33) matches the round nut and is drivingly connected to the output shaft of the reducer (32); and a torque sensor, wherein the torque sensor is arranged at the output shaft of the reducer (32) to detect the torque output by the output shaft of the reducer (32).

2. A high torque nut tightening device according to claim 1, characterized in that: The positioning mechanism (2) comprises a tray (21), and the tray (21) is arranged horizontally; A support plate (22), wherein the support plates (22) are arranged on the top of the tray (21) and are arranged as two opposing plates; and a limiting plate (23), located on a side of the tops of the two support plates (22) that are away from each other; The top of the reduction motor housing is open, the nut is located at the bottom of the inner cavity of the reduction motor housing, and a mounting ring is fixedly connected to the outer side of the bottom of the reduction motor housing. The mounting ring is supported on two support plates (22) and the outer side of the mounting ring is in contact with the side of the two limit plates (23) close to each other.

3. A high torque nut tightening device according to claim 2, characterized in that: It also comprises a transmission mechanism (1), wherein the transmission mechanism (1) is used to transmit the tray (21) in a horizontal direction and drive the tray (21) to pass through the tightening mechanism (3) and be lowered; and a lifting mechanism (4), wherein the lifting mechanism (4) is arranged below the tightening mechanism (3) so as to lift the tray (21) upwards when the tray (21) moves to below the tightening mechanism (3).

4. A high torque nut tightening device according to claim 3, characterized in that: The lifting mechanism (4) comprises a base (41); A support plate (42), wherein the support plate (42) is arranged above the base (41), and the support plate (42) is driven by a cylinder arranged on the base (41) to move up and down; and positioning pins (421), wherein at least two positioning pins (421) are fixedly connected to the top of the support plate (42), and the tray (21) is provided with a plurality of positioning holes (211) respectively corresponding to the plurality of positioning pins (421), and when the support plate (42) lifts the tray (21) upward, the positioning pins (421) are inserted into the corresponding positioning holes (211) and matched with the positioning holes (211).

5. A high torque nut tightening device according to claim 4, characterized in that: The lifting mechanism (4) further comprises a mounting plate (43), wherein the mounting plate (43) is fixedly connected above the base (41), and a plurality of guide seats (431) vertically penetrating the mounting plate (43) are fixedly connected to the mounting plate (43); And a reaction shaft (44), each guide seat (431) is correspondingly provided with a reaction shaft (44), and the reaction shaft (44) is fixedly connected to the bottom of the support plate (42) and vertically passes through the guide seat (431).

6. A high torque nut tightening device according to claim 5, characterized in that: It also includes a bracket (5), wherein the bracket (5) is mounted on the transmission mechanism (1); The tightening mechanism (3) further comprises a slide saddle (34); a slide rail (51) vertical in the length direction is arranged on the bracket (5); the slide saddle (34) slides vertically on the slide rail (51); and the tightening motor (31) and the reducer (32) are fixed on the slide saddle (34); and a counterweight, wherein a plurality of counterweights are detachably connected to the slide saddle (34).

7. A high torque nut tightening device according to claim 6, characterized in that: It also includes a loading and unloading mechanism (8), wherein two loading and unloading mechanisms (8) are provided, and the loading and unloading mechanisms (8) are used to realize loading and unloading of the reduction motor housing on the tray (21); The two ends of the transmission mechanism (1) are arranged as two loading and unloading stations, the middle position of the transmission mechanism (1) is arranged as a tightening station, the tightening mechanism (3) is arranged at the tightening station, and the two loading and unloading mechanisms (8) are arranged at the two loading and unloading stations respectively; The transmission mechanism (1) is provided with two positioning mechanisms (2), and the two positioning mechanisms (2) respectively move between a tightening station and two loading and unloading stations.

8. A high torque nut tightening device according to claim 7, characterized in that: It also comprises a feeding conveyor belt (7), wherein two feeding conveyor belts (7) are provided, the transmission direction of the feeding conveyor belts (7) is arranged along the transmission direction of the transmission mechanism (1), and the unloading ends of the two feeding conveyor belts (7) are respectively arranged at positions close to two loading and unloading stations; and a discharge conveyor belt (6), wherein two discharge conveyor belts (6) are provided, the transmission direction of the discharge conveyor belt (6) is horizontal and perpendicular to the transmission direction of the feed conveyor belt (7), and the feed end of the discharge conveyor belt (6) is located between the discharge end of the feed conveyor belt (7) and the loading and unloading stations; The loading and unloading mechanism (8) is used to drive the reduction motor housing to transfer between the feeding conveyor belt (7), the discharging conveyor belt (6) and the transmission mechanism (1).

9. A high torque nut tightening device according to claim 8, characterized in that: The loading and unloading mechanism (8) comprises a sliding plate (81), which is arranged above the transmission mechanism (1) and can slide in a direction parallel to the conveying direction of the transmission mechanism (1) to achieve sliding between the transmission mechanism (1), the feeding conveyor belt (7) and the discharging conveyor belt (6); A lifting seat (82), the lifting seat (82) is arranged below the sliding plate (81) and can slide up and down on the sliding plate (81); and a clamping plate (83), wherein two clamping plates (83) are provided and arranged at the bottom of the lifting seat (82), the two clamping plates (83) can slide in a horizontal direction to achieve mutual approach and mutual distance, and the two clamping plates (83) can be separated from each other to be supported on the inner wall of the reduction motor housing.

10. A high torque nut tightening device according to claim 9, characterized in that: It also includes a fastening mechanism, wherein two fastening mechanisms are provided and are respectively arranged above the transmission mechanism (1) and near two ends; Two support plates (22) are provided, and the two support plates (22) are respectively located near two sides of the transmission mechanism (1); two threaded holes (221) are provided on the support plate (22); a through hole corresponding to the threaded hole (221) is provided on the mounting ring outside the reduction motor housing; and the fastening mechanism is used to pass the bolt through the through hole and tighten it on the threaded hole (221); The fastening mechanism comprises two fastening assemblies (9), and the two fastening assemblies (9) are respectively used to fasten the bolts on the two support plates (22); The fastening assembly (9) comprises a translation plate (91), and the translation plate (91) slides above the transmission mechanism (1) in a direction parallel to the transmission direction of the transmission mechanism (1); A lifting plate (92), the lifting plate (92) being arranged below the translation plate (91) and being capable of sliding up and down on the translation plate (91); A fastening motor (93), wherein the fastening motor (93) is fixedly connected to the bottom of the lifting plate (92) and is provided with two fastening motors (93), and the two fastening motors (93) respectively correspond to the two threaded holes (221) on the support plate (22); And a matching block (94), the output end of each fastening motor (93) is drivingly connected to a matching block (94), the bottom of the matching block (94) is provided with a hole matching with the bolt head, and the matching block (94) is configured as a magnetic attraction matching block (94).

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