A high-precision active steering wheel assembly for narrow spaces of forklifts and AGV trolleys

Abstract

The invention discloses a technical field of wheel steering, specifically a high-precision active steering wheel assembly for use in narrow spaces of forklifts and AGV trolleys, comprising a base plate, a drive motor and a drive wheel, wherein the drive motor is symmetrically fixedly installed at the middle position of the left and right sides of the base plate, and the drive wheel is installed on the drive shaft of the drive motor; support plates are symmetrically fixedly installed at both front and rear ends of the base plate, a circular hole is opened at the upper end of the support plate, a reducer is fixedly installed at the lower end of the support plate, and a servo motor is installed at one end of the reducer. The beneficial effect of the invention is that when the vehicle needs to turn, the limit mechanism is first released to fix the circular shaft, and at this time the reducer is driven to rotate by the servo motor, so that the active synchronous gear drives the driven synchronous gear to rotate synchronously through the synchronous toothed belt, so that the circular shaft drives the connecting block to rotate through the rotating circular block, and the connecting block drives the steering wheel to rotate through the polygonal plug block and the steering bracket.

Description

Technical Field

[0001] The invention relates to the technical field of wheel steering, in particular to a high-precision active steering wheel assembly used in narrow spaces of forklifts and AGV trolleys. Background Art

[0002] AGV carts and automatic transport forklifts refer to unmanned transport vehicles and trucks that can travel along a specified navigation path and have safety protection and various transfer functions. AGV carts and automatic transport forklifts are characterized by wheeled movement. Compared with walking, crawling or other non-wheeled mobile robots, they have the advantages of fast movement, high work efficiency, simple structure, strong controllability, and good safety. However, the existing AGV carts and automatic transport forklifts are inconvenient to actively turn during the handling process. Due to their large turning radius and poor actual steering angle accuracy of the steering wheel, it is very inconvenient to turn in some narrow spaces, which can easily cause the vehicle to collide with other objects, or cause the cargo loaded on the vehicle to collide, which not only affects the stable transportation of the cargo, but also causes the vehicle's driving trajectory to deviate due to poor steering accuracy and low stability. Summary of the invention

[0003] The object of the present invention is to provide a high-precision active steering wheel assembly for use in narrow spaces of forklifts and AGV trolleys, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a high-precision active steering wheel assembly for narrow spaces of forklifts and AGV trolleys, comprising a base plate, a drive motor and a drive wheel, wherein the drive motor is symmetrically fixedly installed at the middle position of the left and right sides of the base plate, and the drive wheel is installed on the drive shaft of the drive motor;

[0005] The front and rear ends of the bottom plate are symmetrically fixedly installed with support plates, the upper end of the support plate is provided with a circular hole, the lower end of the support plate is fixedly installed with a reducer, one end of the reducer is installed with a servo motor, the upper end of the support plate is symmetrically rotatably installed with a driving synchronous gear and a driven synchronous gear, the driving synchronous gear and the driven synchronous gear are jointly sleeved with a synchronous toothed belt, the driving synchronous gear is driven by the output shaft of the reducer, the inner side of the driven synchronous gear is penetrated and inserted from top to bottom with a round shaft, the lower end of the round shaft is fixedly connected to the upper end of the rotating round block, the lower end of the round shaft is fixedly installed with a potentiometer, and the potentiometer is arranged above the support plate;

[0006] The lower end of the rotating circular block is fixedly connected with a connecting block, and a steering bracket is installed at the lower end of the connecting block. The steering bracket is rotatably connected with a steering wheel through a rotating shaft, and a limiting mechanism for positioning the steering wheel is installed at the upper end of the circular shaft. A polygonal slot is provided at the lower end of the connecting block, and a contraction groove is provided at the inner side wall of the polygonal slot. A threaded hole is penetrated through the side of the contraction groove, and a polygonal plug block is inserted in the polygonal slot. The lower end of the polygonal plug block is fixedly connected to the steering bracket, and a groove is provided on the side of the polygonal plug block. A docking tooth plate is fixedly connected in the groove, and a locking mechanism for fixing the polygonal plug block is installed in the contraction groove.

[0007] Preferably, an annular groove is provided at the upper end of the circular hole, the rotating circular block is rotatably connected to the circular hole, the upper end of the rotating circular block is fixedly sleeved by an annular plate, the annular plate is rotatably connected to the annular groove, and the upper end of the connecting block is in rotational contact with the lower end of the support plate.

[0008] Preferably, the upper end of the support plate is fixedly connected to a concave bracket, the top of the inner side of the concave bracket is fixedly connected to a concave support seat, and the upper end of the circular shaft is rotatably connected to the upper end of the concave bracket;

[0009] The limiting mechanism includes a circular sleeve fixedly sleeved on the circular shaft, two positioning rings and a limiting toothed ring fixedly sleeved on the circular sleeve, and a self-locking mechanism arranged on the side of the limiting toothed ring. The two positioning rings are symmetrically distributed at the upper and lower ends of the circular sleeve, and the limiting toothed ring is arranged between the two positioning rings.

[0010] Preferably, the self-locking mechanism includes an electric telescopic rod fixedly installed on the inner side of the concave support seat, a pressure plate fixedly installed on the inner rod of the electric telescopic rod, an extension rod fixedly connected to the side of the pressure plate, a self-locking tooth block fixedly connected to the end of the extension rod away from the pressure plate, a rectangular sleeve sleeved on the extension rod, and a deceleration pad fixedly installed at one end of the rectangular sleeve, and the end of the rectangular sleeve away from the deceleration pad is symmetrically provided with installation grooves, and a first elastic sheet is fixedly installed in the installation groove, and one side of the first elastic sheet passes through the installation groove and abuts against the side of the pressure plate.

[0011] Preferably, the rectangular sleeve is slidably connected to the extension rod, the rectangular sleeve is in slidable contact with the inner wall of the concave support seat, the deceleration pad is in abutment with the side of the positioning ring, and the self-locking tooth block is clamped with the limiting tooth ring.

[0012] Preferably, the locking mechanism includes a concave block slidably installed on a locking tooth plate, fixedly installed on the side of the locking tooth plate, a second elastic sheet symmetrically fixedly installed on the side of the locking tooth plate, and a locking bolt installed in a threaded hole, one end of the locking bolt extends through the threaded hole into the shrinkage groove and is fixedly connected to the light rod, and one end of the light rod extends through the concave block to the inner side thereof and is fixedly connected to a locking ring.

[0013] Preferably, the locking tooth plate is clamped with the docking tooth plate, one side of the second elastic sheet abuts against the inner wall of the shrinkage groove, the locking bolt is threadedly connected with the threaded hole, and the polished rod is slidably connected with the concave block.

[0014] Compared with the prior art, the invention has the following advantages:

[0015] 1. When the vehicle needs to turn, first loosen the fixing of the circular shaft by the limit mechanism. At this time, the reducer is driven to rotate by the servo motor, so that the active synchronous gear drives the driven synchronous gear to rotate synchronously through the synchronous belt, and the circular shaft drives the connecting block to rotate through the rotating circular block. The connecting block drives the steering wheel to rotate through the polygonal plug block and the steering bracket, thereby realizing the vehicle steering operation; since the front and rear ends of the vehicle are provided with steering components, the vehicle can turn conveniently, and the turning radius is small, and it can still turn stably in a small space. The actual angle of the steering wheel can be detected in real time through the set potentiometer, and the data feedback of the potentiometer forms a closed-loop control with the servo motor, which greatly improves the actual rotation angle accuracy of the steering wheel.

[0016] 2. After the vehicle completes steering, the deceleration pad in the limiting mechanism is first abutted against the positioning ring, and then the self-locking tooth block in the limiting mechanism is engaged with the limiting tooth ring to fix the limiting tooth ring to prevent it from rotating, thereby locking the circular shaft to prevent the steering wheel from rotating when steering is not required, thereby effectively preventing the steering wheel from deviating from the path and ensuring accurate and stable movement of the vehicle.

[0017] 3. The locking mechanism can be easily installed and disassembled between the polygonal plug block and the connecting block, which makes it convenient to install and disassemble the steering wheel, and facilitates the maintenance, repair and replacement of the steering wheel in the later stage, greatly improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of the high-precision active steering wheel assembly of the present invention for use in narrow spaces of forklifts and AGV trolleys;

[0019] Figure 2 This is a three-dimensional diagram of the structure of the high-precision active steering wheel assembly of the present invention;

[0020] Figure 3 This is a cross-sectional view of the structure of the high-precision active steering wheel assembly of the present invention;

[0021] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0022] Figure 5It is a three-dimensional diagram of the structure of the circular shaft and the limiting mechanism of the present invention;

[0023] Figure 6 This is an exploded view of the structure of the high-precision active steering wheel assembly of the present invention;

[0024] Figure 7 for Figure 6 A magnified schematic diagram of the structure at B in the middle;

[0025] Figure 8 It is an exploded view of the connecting block, polygonal plug block and locking mechanism structure of the present invention.

[0026] In the figure: 1, bottom plate; 11, driving motor; 12, driving wheel; 2, support plate; 21, circular hole; 22, annular groove; 23, reducer; 24, servo motor; 25, active synchronous gear; 26, concave bracket; 27, concave support seat; 3, rotating round block; 31, annular plate; 32, round shaft; 33, potentiometer; 34, driven synchronous gear; 35, synchronous belt; 4, connecting block; 41, polygonal slot; 42, contraction groove; 43, thread hole; 5, steering bracket; 51, steering wheel; 52, polygonal plug block; 53, groove; 54, docking tooth plate; 6, circular sleeve; 61, positioning ring; 62, limit tooth ring; 7, electric telescopic rod; 71, pressure plate; 72, extension rod; 73, self-locking tooth block; 74, rectangular sleeve; 75, speed reduction pad; 76, first elastic sheet; 8, locking tooth plate; 81, concave block; 82, second elastic sheet; 9, locking bolt; 91, light rod; 92, locking ring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figures 1 to 8 The present invention provides a technical solution: a high-precision active steering wheel assembly for narrow spaces of forklifts and AGV trolleys, comprising a base plate 1, a drive motor 11 and a drive wheel 12, wherein the drive motor 11 is symmetrically fixedly installed at the middle position of the left and right sides of the base plate 1, and the drive wheel 12 is installed on the drive shaft of the drive motor 11, and the drive wheel 12 is driven to roll by the drive shaft of the drive motor 11;

[0029] The front and rear ends of the bottom plate 1 are symmetrically fixedly installed with support plates 2, the upper end of the support plate 2 is provided with a circular hole 21, the lower end of the support plate 2 is fixedly installed with a reducer 23, one end of the reducer 23 is provided with a servo motor 24, the upper end of the support plate 2 is symmetrically rotatably installed with a driving synchronous gear 25 and a driven synchronous gear 34, the driving synchronous gear 25 and the driven synchronous gear 34 are jointly sleeved with a synchronous toothed belt 35, the driving synchronous gear 25 and the driven synchronous gear 34 are symmetrically distributed at the two ends of the inner side of the synchronous toothed belt 35, and ... arranged with a synchronous belt 35. The step gear 25 and the driven synchronous gear 34 are both meshed with the synchronous belt 35. The driving synchronous gear 25 is driven by the output shaft of the reducer 23. A round shaft 32 is inserted through the inner side of the driven synchronous gear 34 from top to bottom. The lower end of the round shaft 32 is fixedly connected to the upper end of the rotating round block 3. The lower end of the rotating round block 3 is fixedly connected to a connecting block 4. A steering bracket 5 is installed at the lower end of the connecting block 4. A steering wheel 51 is rotatably connected to the steering bracket 5 through a rotating shaft. A limiting mechanism for positioning the steering wheel 51 is installed at the upper end of the round shaft 32.

[0030] See also Figure 3 and Figure 6 The upper end of the circular hole 21 is provided with an annular groove 22, the rotating circular block 3 is rotatably connected to the circular hole 21, the upper end of the rotating circular block 3 is fixedly sleeved by an annular plate 31, the annular plate 31 is rotatably connected to the annular groove 22, and the upper end of the connecting block 4 is in rotatable contact with the lower end of the supporting plate 2. The annular plate 31 and the connecting block 4 are used to limit the rotating circular block 3, prevent the rotating circular block 3 from shaking up and down at will, and enable the rotating circular block 3 to stably rotate along the circular hole 21.

[0031] A potentiometer 33 is fixedly mounted on the lower end of the circular shaft 32. The potentiometer 33 is arranged above the support plate 2 and below the driven synchronous gear 34. The potentiometer 33 is arranged to detect the actual rotation angle of the steering wheel 51 in real time, and the data feedback of the potentiometer 33 forms a closed-loop control with the servo motor 24, which greatly improves the actual rotation angle accuracy of the steering wheel 51.

[0032] See also Figure 3 , Figures 5 to 7 The upper end of the support plate 2 is fixedly connected with a concave bracket 26, the top of the inner side of the concave bracket 26 is fixedly connected with a concave support seat 27, and the upper end of the circular shaft 32 is rotatably connected with the upper end of the concave bracket 26;

[0033] The limiting mechanism includes a circular sleeve 6 fixedly sleeved on the circular shaft 32, two positioning rings 61 and a limiting toothed ring 62 fixedly sleeved on the circular sleeve 6, and a self-locking mechanism arranged on the side of the limiting toothed ring 62. The two positioning rings 61 are symmetrically distributed at the upper and lower ends of the circular sleeve 6, and the limiting toothed ring 62 is arranged between the two positioning rings 61.

[0034] The self-locking mechanism includes an electric telescopic rod 7 fixedly installed on the inner side of the concave support seat 27, a pressure plate 71 fixedly installed on the inner rod of the electric telescopic rod 7, an extension rod 72 fixedly connected to the side of the pressure plate 71, a self-locking tooth block 73 fixedly connected to the end of the extension rod 72 away from the pressure plate 71, a rectangular sleeve 74 sleeved on the extension rod 72, and a deceleration pad 75 fixedly installed at one end of the rectangular sleeve 74. The end of the rectangular sleeve 74 away from the deceleration pad 75 is symmetrically provided with mounting grooves, and a first elastic sheet 76 is fixedly installed in the mounting groove. One side of the first elastic sheet 76 passes through the mounting groove and abuts against the side of the pressure plate 71.

[0035] The rectangular sleeve 74 is slidably connected to the extension rod 72, and the rectangular sleeve 74 is in sliding contact with the inner side wall of the concave support seat 27, the deceleration pad 75 is in contact with the side of the positioning ring 61, and the self-locking tooth block 73 is engaged with the limiting tooth ring 62. A rectangular through groove is provided through the side of the deceleration pad 75, and the self-locking tooth block 73 is slidably connected to the rectangular through groove, so that the self-locking tooth block 73 can be telescopically moved outward or inward along the deceleration pad 75 through the provided rectangular through groove.

[0036] When the circular shaft 32 needs to be self-locked, the inner rod of the electric telescopic rod 7 is extended to drive the pressing plate 71 to move, and the pressing plate 71 drives the extension rod 72 and the rectangular sleeve 74 to move, and the rectangular sleeve 74 drives the deceleration pad 75 to contact the positioning ring 61 first;

[0037] When the locking cam 72 is in the unlocking state, the locking cam 72 is in the unlocking state, and the locking cam 72 is in the unlocking state, so that the locking cam 72 is locked and the locking cam 72 is locked.

[0038] See also Figure 3 , Figure 4 and Figure 8 A polygonal slot 41 is provided at the lower end of the connecting block 4, a contraction groove 42 is provided on the inner side wall of the polygonal slot 41, a threaded hole 43 is provided through the side of the contraction groove 42, a polygonal plug-in block 52 is inserted into the polygonal slot 41, the lower end of the polygonal plug-in block 52 is fixedly connected to the steering bracket 5, the upper end of the steering bracket 5 is in contact with the lower end of the connecting block 4, a groove 53 is provided on the side of the polygonal plug-in block 52, a docking tooth plate 54 is fixedly connected in the groove 53, and a locking mechanism for fixing the polygonal plug-in block 52 is installed in the contraction groove 42.

[0039] The locking mechanism provided can facilitate installation and disassembly between the polygonal plug block 52 and the connecting block 4, thereby facilitating installation and disassembly of the steering wheel 51 and facilitating maintenance, repair and replacement of the steering wheel 51 at a later stage.

[0040] The locking mechanism includes a concave block 81 slidably mounted on the locking tooth plate 8, fixedly mounted on the side of the locking tooth plate 8, a second elastic sheet 82 symmetrically fixedly mounted on the side of the locking tooth plate 8, and a locking bolt 9 installed in the threaded hole 43. One end of the locking bolt 9 extends through the threaded hole 43 to the contraction groove 42 and is fixedly connected to the light rod 91. One end of the light rod 91 extends through the concave block 81 to the inner side thereof and is fixedly connected to the locking ring 92.

[0041] The locking tooth plate 8 is engaged with the docking tooth plate 54, the cross-sections of the teeth of the locking tooth plate 8 and the docking tooth plate 54 are right-angled triangles, the inclined surfaces of the teeth of the locking tooth plate 8 and the docking tooth plate 54 are arranged in parallel, the right-angled ends of the teeth of the docking tooth plate 54 are arranged at the lower ends of the teeth, and the right-angled ends of the teeth of the locking tooth plate 8 are arranged at the upper ends of the teeth, and the teeth of the locking tooth plate 8 are engaged with the teeth of the docking tooth plate 54;

[0042] One side of the second elastic piece 82 abuts against the inner wall of the contraction groove 42 , and the second elastic piece 82 applies elastic force to the locking tooth plate 8 . The locking bolt 9 is threadedly connected to the threaded hole 43 , and the polished rod 91 is slidably connected to the concave block 81 .

[0043] The diameter of the polished rod 91 is smaller than the minimum inner diameter of the threaded hole 43 , that is, the polished rod 91 can slide flexibly along the threaded hole 43 .

[0044] The locking bolt 9 is screwed into the threaded hole 43, and the locking bolt 9 drives the polished rod 91 to slide along the concave block 81. At the same time, the polished rod 91 drives the locking ring 92 to approach the locking tooth plate 8 until the locking ring 92 abuts against the side of the locking tooth plate 8, thereby stopping the locking bolt 9 from being further selected into the threaded hole 43. The locking ring 92 is arranged to firmly abut the locking tooth plate 8 to prevent the locking tooth plate 8 from separating from the docking tooth plate 54, thereby firmly fixing the steering bracket 5 and the connecting block 4.

[0045] Working principle: When the vehicle needs to turn, the inner rod of the electric telescopic rod 7 is first contracted to drive the extension rod 72 and the rectangular sleeve 74 to move, the extension rod 72 drives the self-locking tooth block 73 to separate from the limiting tooth ring 62, and the rectangular sleeve 74 drives the deceleration pad 75 to separate from the positioning ring 61, so that the limiting mechanism releases the fixation of the circular shaft 32;

[0046] At this time, the servo motor 24 drives the reducer 23 to rotate, the output shaft of the reducer 23 drives the active synchronous gear 25 to rotate, the active synchronous gear 25 drives the driven synchronous gear 34 to rotate synchronously through the synchronous belt 35, the driven synchronous gear 34 drives the round shaft 32 to rotate, the round shaft 32 drives the connecting block 4 to rotate through the rotating round block 3, the connecting block 4 drives the steering wheel 51 to rotate through the polygonal plug block 52 and the steering bracket 5, thereby realizing the vehicle steering operation;

[0047] Since the vehicle is provided with steering components at both ends, the vehicle can be turned conveniently, and the turning radius is small, so that the vehicle can still turn stably in a narrow space. The potentiometer 33 is set to detect the actual rotation angle of the steering wheel 51 in real time, and the data feedback of the potentiometer 33 and the servo motor 24 form a closed-loop control, which greatly improves the actual rotation angle accuracy of the steering wheel 51.

[0048] When the vehicle turns, the inner rod of the electric telescopic rod 7 extends to drive the pressure plate 71 to move, and the pressure plate 71 drives the extension rod 72 and the rectangular sleeve 74 to move, and the rectangular sleeve 74 drives the deceleration pad 75 to contact the positioning ring 61 first;

[0049] When the locking cam 72 is in the unlocking state, the locking cam 72 is in the unlocking state, and the locking cam 72 is in the unlocking state, so that the locking cam 72 is locked and the locking cam 72 is locked.

[0050] When the steering wheel 51 of the vehicle needs to be disassembled, the locking bolt 9 is screwed out of the threaded hole 43, and the locking bolt 9 drives one end of the polished rod 91 to slide outward along the threaded hole 43, and the other end of the polished rod 91 slides along the concave block 81;

[0051] The light rod 91 drives the locking ring 92 to contact the inner wall of the concave block 81. At this time, the locking bolt 9 is pulled outward, and the locking bolt 9 drives the light rod 91 to move outward. The light rod 91 drives the concave block 81 to move into the contraction groove 42 through the locking ring 92. The concave block 81 drives the locking tooth plate 8 to move into the contraction groove 42, so that the locking tooth plate 8 is separated from the docking tooth plate 54. At this time, the steering bracket 5 is pulled downward to move the polygonal plug block 52 out of the polygonal slot 41, thereby completing the disassembly of the steering wheel 51.

[0052] When the steering wheel 51 needs to be installed, the polygonal plug block 52 at the upper end of the steering bracket 5 is inserted along the polygonal slot 41. When the docking tooth plate 54 on the side of the polygonal plug block 52 contacts the locking tooth plate 8, the docking tooth plate 54 squeezes the locking tooth plate 8 to move into the contraction groove 42, and the locking tooth plate 8 squeezes the second elastic sheet 82. When the polygonal plug block 52 is completely inserted into the polygonal slot 41, that is, the upper end of the steering bracket 5 contacts the lower end of the connecting block 4, the locking tooth plate 8 is engaged with the docking tooth plate 54 under the action of the elastic force of the second elastic sheet 82, so that the polygonal plug block 52 is initially fixed to the connecting block 4.

[0053] Then screw the locking bolt 9 into the threaded hole 43, the locking bolt 9 drives the polished rod 91 to slide along the concave block 81, and at the same time the polished rod 91 drives the locking ring 92 to approach the locking toothed plate 8 until the locking ring 92 abuts against the side of the locking toothed plate 8, thereby stopping the locking bolt 9 from being further inserted into the threaded hole 43, and the locking ring 92 is firmly against the locking toothed plate 8 to prevent the locking toothed plate 8 from separating from the docking toothed plate 54, so that the steering bracket 5 and the connecting block 4 are firmly fixed, thereby completing the installation of the steering wheel 51;

[0054] The locking mechanism provided can facilitate installation and disassembly of the polygonal plug block 52 and the connecting block 4, thereby facilitating installation and disassembly of the steering wheel 51, and facilitating the subsequent maintenance, repair and replacement of the steering wheel 51, thereby greatly improving work efficiency.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision active steering wheel assembly for use in narrow spaces of forklifts and AGV trolleys, comprising a base plate (1), a drive motor (11) and a drive wheel (12), wherein the drive motor (11) is symmetrically fixedly mounted in the middle of the left and right sides of the base plate (1), and the drive wheel (12) is mounted on the drive shaft of the drive motor (11); Features: The front and rear ends of the bottom plate (1) are both symmetrically fixedly mounted with support plates (2), the upper end of the support plate (2) is provided with a circular hole (21), the lower end of the support plate (2) is fixedly mounted with a reducer (23), one end of the reducer (23) is mounted with a servo motor (24), the upper end of the support plate (2) is symmetrically rotatably mounted with a driving synchronous gear (25) and a driven synchronous gear (34), the driving synchronous gear (25) and the driven synchronous gear (34) are jointly sleeved with a synchronous toothed belt (35), the driving synchronous gear (25) is driven by the output shaft of the reducer (23), a round shaft (32) is inserted through the inner side of the driven synchronous gear (34) from top to bottom, the lower end of the round shaft (32) is fixedly connected to the upper end of the rotating round block (3), the lower end of the round shaft (32) is fixedly mounted with a potentiometer (33), and the potentiometer (33) is arranged above the support plate (2); The lower end of the rotating circular block (3) is fixedly connected to a connecting block (4), the lower end of the connecting block (4) is installed with a steering bracket (5), the steering bracket (5) is rotatably connected to a steering wheel (51) via a rotating shaft, the upper end of the circular shaft (32) is installed with a limiting mechanism for positioning the steering wheel (51), the lower end of the connecting block (4) is provided with a polygonal slot (41), the inner side wall of the polygonal slot (41) is provided with a contraction groove (42), the side of the contraction groove (42) is penetrated by a threaded hole (43), a polygonal plug-in block (52) is inserted into the polygonal slot (41), the lower end of the polygonal plug-in block (52) is fixedly connected to the steering bracket (5), the side of the polygonal plug-in block (52) is provided with a groove (53), a butt tooth plate (54) is fixedly connected to the groove (53), and a locking mechanism for fixing the polygonal plug-in block (52) is installed in the contraction groove (42).

2. According to claim 1, a high-precision active steering wheel assembly for narrow spaces of forklifts and AGV trolleys is characterized by: An annular groove (22) is formed at the upper end of the circular hole (21); the rotating circular block (3) is rotatably connected to the circular hole (21); the upper end of the rotating circular block (3) is fixedly sleeved by an annular plate (31); the annular plate (31) is rotatably connected to the annular groove (22); and the upper end of the connecting block (4) is in rotatable contact with the lower end of the supporting plate (2).

3. The high-precision active steering wheel assembly for narrow spaces of forklifts and AGV trolleys according to claim 1, characterized in that: The upper end of the support plate (2) is fixedly connected to a concave bracket (26), the top of the inner side of the concave bracket (26) is fixedly connected to a concave support seat (27), and the upper end of the circular shaft (32) is rotatably connected to the upper end of the concave bracket (26); The limiting mechanism comprises a circular sleeve (6) fixedly sleeved on the circular shaft (32), two positioning rings (61) fixedly sleeved on the circular sleeve (6) and a limiting toothed ring (62), and a self-locking mechanism arranged on the side of the limiting toothed ring (62), the two positioning rings (61) being symmetrically distributed at the upper and lower ends of the circular sleeve (6), and the limiting toothed ring (62) being arranged between the two positioning rings (61).

4. The high-precision active steering wheel assembly for narrow spaces of forklifts and AGV trolleys according to claim 3 is characterized in that: The self-locking mechanism comprises an electric telescopic rod (7) fixedly mounted on the inner side of a concave support seat (27), a pressure plate (71) fixedly mounted on the inner rod of the electric telescopic rod (7), an extension rod (72) fixedly connected to the side of the pressure plate (71), a self-locking tooth block (73) fixedly connected to the end of the extension rod (72) away from the pressure plate (71), a rectangular sleeve (74) sleeved on the extension rod (72), and a deceleration pad (75) fixedly mounted on one end of the rectangular sleeve (74), wherein an installation groove is symmetrically formed at one end of the rectangular sleeve (74) away from the deceleration pad (75), and a first elastic sheet (76) is fixedly mounted in the installation groove, and one side of the first elastic sheet (76) passes through the installation groove and abuts against the side of the pressure plate (71).

5. The high-precision active steering wheel assembly for narrow spaces of forklifts and AGV trolleys according to claim 4, characterized in that: The rectangular sleeve (74) is slidably connected to the extension rod (72), the rectangular sleeve (74) is in slidable contact with the inner wall of the concave support seat (27), the deceleration pad (75) is in abutment with the side surface of the positioning ring (61), and the self-locking tooth block (73) is clamped with the limiting tooth ring (62).

6. The high-precision active steering wheel assembly for narrow spaces of forklifts and AGV trolleys according to claim 1, characterized in that: The locking mechanism comprises a locking tooth plate (8) slidably mounted on the locking tooth plate (8), a concave block (81) fixedly mounted on the side of the locking tooth plate (8), a second elastic sheet (82) symmetrically fixedly mounted on the side of the locking tooth plate (8) up and down, and a locking bolt (9) mounted in the threaded hole (43), one end of the locking bolt (9) passes through the threaded hole (43) to extend into the contraction groove (42) and is fixedly connected to a light rod (91), and one end of the light rod (91) passes through the concave block (81) to extend to the inner side thereof and is fixedly connected to a locking ring (92).

7. The high-precision active steering wheel assembly for narrow spaces of forklifts and AGV trolleys according to claim 6, characterized in that: The locking tooth plate (8) is clamped with the docking tooth plate (54), one side of the second elastic sheet (82) is in contact with the inner wall of the contraction groove (42), the locking bolt (9) is threadedly connected with the threaded hole (43), and the polished rod (91) is slidably connected with the concave block (81).

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