Heavy two-way pallet fork transmission structure

Abstract

The utility model relates to the technical field of pallet forks, in particular to a heavy two-way pallet fork transmission structure which comprises a first-stage fixing body, second-stage moving plates are installed on the two side walls of an inner cavity of the first-stage fixing body in a sliding mode, third-stage moving plates are connected to the inner side walls of the second-stage moving plates in a sliding mode, fourth-stage moving plates are installed on the inner side walls of the third-stage moving plates in a sliding mode, and third-stage moving plates are installed on the inner side walls of the fourth-stage moving plates. A first moving shaft speed-increasing gear rack pair is mounted between the second-stage moving plate and the first-stage fixed body; and a second moving shaft speed-increasing gear rack pair is mounted among the second-stage moving plate, the third-stage moving plate and the fourth-stage moving plate. By adopting a linear rail form and a gear rack form as a transmission form, the transmission precision between transmission pairs is greatly improved, so that the integral repeated positioning precision of the mechanism is improved, the positioning precision is improved, the rigidity of the structure is increased and the service life of the structure is prolonged while auxiliary rollers are used at positions with larger stress on the bottom layer; and each stage of transmission connecting plate adopts an embedded split design, so that the space utilization rate of the structure is improved, and the mechanism volume is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cargo forks, in particular to a heavy-duty bidirectional cargo fork transmission structure. Background Art

[0002] Flexible manufacturing production lines are increasing day by day, and market demands are diversified. Traditional roller forks have low positioning accuracy and large size. In actual design, they have high requirements for machine tool space and are not compatible with equipment from major machine tool manufacturers. Improvements are urgently needed. To take this step, it is necessary to design a product with a relatively compact structure, high transmission accuracy, and high positioning accuracy to solve the above confusions.

[0003] Therefore, we propose a heavy-duty bidirectional fork transmission structure. Utility Model Content

[0004] The purpose of the utility model is to provide a heavy-duty bidirectional fork transmission structure, which solves the problems raised in the background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a heavy-duty bidirectional fork transmission structure, comprising a primary fixed body, secondary movable plates slidably mounted on both side walls of an inner cavity of the primary fixed body, a first transverse plate fixed between the bottoms of the two secondary movable plates, a third movable plate slidably connected to the inner side walls of the secondary movable plates, a second transverse plate fixedly connected to the bottoms of the two third movable plates, and a fourth movable plate slidably mounted on the inner side walls of the third movable plates;

[0006] A servo motor and a reducer are fixed to one side of the bottom of the first-level fixed body, the outer end of the servo motor is connected to the reducer, the outer end of the power shaft of the reducer is fixedly connected to the driving gear, the outer wall of the driving gear is connected to the driven gear through a transmission chain, and a power shaft is fixed at the middle of one side wall of the driven gear, the power shaft moves through the corresponding side wall of the first-level fixed body and is fixedly connected to the power gear, and a first straight rack is fixed at the outer wall of the secondary movable plate corresponding to the power gear, the first straight rack is meshed with the power gear, a first dynamic shaft speed-increasing gear rack pair is installed between the secondary movable plate and the first-level fixed body, and a second dynamic shaft speed-increasing gear rack pair is installed between the secondary movable plate, the third movable plate and the fourth movable plate.

[0007] By adopting the above technical solution, the servo motor drives the driving gear to rotate after being decelerated by the reducer, thereby driving the driven gear to rotate under the drive of the transmission chain, and then driving the short shaft to rotate, and driving the power gear to rotate. The power gear drives the first straight rack to move, and drives the secondary moving plate to move. When the secondary moving plate moves, the transmission is carried out through the first moving shaft speed-increasing gear rack pair, so that the third-stage moving plate moves at twice the speed, and then the transmission is carried out through the second moving shaft speed-increasing gear rack pair, and the fourth-stage moving plate moves at twice the speed again, realizing four-stage power transmission, thereby greatly improving the transmission accuracy between the transmission pairs, thereby improving the overall repeat positioning accuracy of the mechanism.

[0008] As a preferred embodiment of the present invention, the first dynamic shaft speed-increasing gear rack pair includes a short shaft, which movably passes through the first horizontal plate, and the first gear and the second gear are fixed at both ends of the short shaft respectively. The outer walls of the first gear and the second gear are respectively engaged with the second spur rack and the third spur rack, the second spur rack is fixed to the bottom of the first-stage fixed body cavity, and the third spur rack is fixed to the inner side wall of the third-stage movable plate.

[0009] By adopting the above technical solution, when the power gear drives the secondary movable plate to move, transmission is transmitted between the first gear and the fixed second spur rack, so that the first gear and the second gear rotate, thereby driving the third spur rack to move, and then the third movable plate moves at twice the speed of the secondary movable plate.

[0010] As a preferred embodiment of the present invention, the second moving shaft speed increasing gear rack pair includes a third gear, a fourth spur rack and a fifth spur rack. Mounting holes are provided on both sides of the inner side wall of the three-stage movable plate. The third gear is rotatably mounted in the mounting hole. The fourth spur rack is fixed to the inner side wall of the second-stage movable plate, and the fifth spur rack is fixed to the tail end of the fourth-stage movable plate. The third gear is respectively engaged with the fourth spur rack and the fifth spur rack.

[0011] By adopting the above technical solution, in the process of the secondary movable plate driving the tertiary movable plate to move, the tertiary movable plate moves at an increased speed, so that the fourth spur rack drives the third gear to rotate, so that the third gear drives the fifth spur rack to move, thereby driving the fourth movable plate to move at a speed twice that of the tertiary movable plate.

[0012] As a preferred embodiment of the present invention, auxiliary rollers are rotatably mounted on the outer walls of one end of the secondary movable plate and the tertiary movable plate.

[0013] As a preferred embodiment of the present invention, a third slide rail is fixed on the top of the three-stage movable plate, an outer wall of the third slide rail is sleeved with an adaptive third slider, and the third slider is fixedly connected to the four-stage movable plate.

[0014] As a preferred embodiment of the present invention, the inner wall of the secondary movable plate is fixed with a second slide rail, the outer wall of the second slide rail is slidably sleeved with an adaptive second slider, and the outer wall of the second slider is fixedly connected to the outer wall of the tertiary movable plate.

[0015] As a preferred embodiment of the present invention, a first slide rail is fixed to the bottom of the inner cavity of the first fixed body corresponding to the secondary movable plate, and the outer wall sliding sleeve of the first slide rail is provided with an adaptive first slider, and the top of the first slider is fixedly connected to the bottom of the secondary movable plate.

[0016] As a preferred embodiment of the present invention, a carrier is fixed to one side wall of the first-level fixed body, and the power shaft of the reducer movably passes through the carrier.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The technical solution of the present application provides a heavy-duty bidirectional fork transmission structure, which adopts a linear rail form and a gear rack form, thereby greatly improving the transmission accuracy between the transmission pairs, thereby improving the overall repeat positioning accuracy of the mechanism. Auxiliary rollers are used at the bottom layer where the force is greater, which improves the positioning accuracy while increasing the rigidity and service life of the structure. The transmission connecting plates at all levels adopt an embedded split design, which improves the utilization rate of the structural space, greatly reduces the volume of the mechanism, and improves the compatibility of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a heavy-duty bidirectional fork transmission structure of the utility model;

[0021] Figure 2 This is a side structural diagram of a heavy-duty bidirectional fork transmission structure of the utility model;

[0022] Figure 3 This is an enlarged structural diagram of A of a heavy-duty bidirectional fork transmission structure of the present invention.

[0023] In the picture:

[0024] 1. Fourth-stage moving plate; 2. Third-stage moving plate; 3. Second-stage moving plate; 4. First-stage fixed body; 5. Auxiliary roller; 6. Servo motor; 7. Transmission chain; 8. Reducer; 9. First slider; 10. Second slider; 11. Third slide rail; 12. Second gear; 13. Third gear; 14. Power gear; 15. Driving gear; 16. Driven gear; 17. Carrier; 18. First spur rack; 19. Third spur rack; 20. Fourth spur rack; 21. Fifth spur rack; 22. First gear; 23. Second spur rack. DETAILED DESCRIPTION

[0025] See also Figure 1-3 The utility model provides a technical solution: a heavy-duty bidirectional fork transmission structure, including a primary fixed body 4, a secondary movable plate 3 is slidably mounted on both side walls of the inner cavity of the primary fixed body 4, a first transverse plate is fixed between the bottoms of the two secondary movable plates 3, a third movable plate 2 is slidably connected to the inner side wall of the secondary movable plate 3, a second transverse plate is fixedly connected to the bottoms of the two third movable plates 2, and a fourth movable plate 1 is slidably mounted on the inner side wall of the third movable plate 2;

[0026] A servo motor 6 and a reducer 8 are fixed to one side of the bottom of the first-level fixed body 4. The outer end of the servo motor 6 is connected to the reducer 8. The outer end of the power shaft of the reducer 8 is fixedly connected to a driving gear 15. The outer wall of the driving gear 15 is connected to a driven gear 16 through a transmission chain 7. A power shaft is fixed in the middle of one side wall of the driven gear 16. The power shaft moves through the corresponding side wall of the first-level fixed body 4 and is fixedly connected to the power gear 14. A first straight rack 18 is fixed on the outer wall of the secondary movable plate 3 corresponding to the power gear 14. The first straight rack 18 is engaged with the power gear 14. A first dynamic shaft speed-increasing gear rack pair is installed between the secondary movable plate 3 and the first-level fixed body 4. A second dynamic shaft speed-increasing gear rack pair is installed between the secondary movable plate 3, the tertiary movable plate 2 and the quaternary movable plate 1.

[0027] In actual use, the servo motor 6 drives the driving gear 15 to rotate after being decelerated by the reducer 8, thereby driving the driven gear 16 to rotate under the drive of the transmission chain 7, and then driving the short shaft to rotate, and driving the power gear 14 to rotate. The power gear 14 drives the first straight rack 18 to move, and drives the secondary movable plate 3 to move. When the secondary movable plate 3 moves, the transmission is carried out through the first moving shaft speed-increasing gear rack pair, so that the tertiary movable plate 2 moves at twice the speed, and then the transmission is carried out through the second moving shaft speed-increasing gear rack pair, and the fourth movable plate 1 moves at twice the speed again, realizing four-stage power transmission, thereby greatly improving the transmission accuracy between the transmission pairs, thereby improving the overall repeatability of the mechanism.

[0028] Furthermore, a carrier 17 is fixed to one side wall of the primary fixed body 4 , and the power shaft of the reducer 8 movably passes through the carrier 17 . The arrangement of the carrier 17 ensures that the power shaft of the reducer 8 has high rotation stability.

[0029] Furthermore, a first slide rail is fixed at the bottom of the inner cavity of the first fixed body 4 corresponding to the secondary movable plate 3, and the outer wall sliding sleeve of the first slide rail is provided with an adaptive first slider 9. The top of the first slider 9 and the bottom of the secondary movable plate 3 are fixedly connected. The cooperation between the first slider 9 and the first slide rail makes the movement stability of the secondary movable plate 3 high.

[0030] It is worth mentioning that the inner wall of the secondary movable plate 3 is fixed with the second slide rail, and the outer wall sliding sleeve of the second slide rail is equipped with an adaptive second slider 10. The outer wall of the second slider 10 is fixedly connected to the outer wall of the tertiary movable plate 2. The setting of the second slide rail and the second slider 10 makes the movement stability of the tertiary movable plate 2 high.

[0031] It should be noted that a third slide rail 11 is fixed to the top of the three-level movable plate 2, and the outer wall of the third slide rail 11 is provided with an adaptive third slider. The third slider is fixedly connected to the four-level movable plate 1. The setting of the third slider and the third slide rail 11 makes the four-level movable plate 1 move stably and high.

[0032] In addition, auxiliary rollers 5 are rotatably installed on the outer walls of one end of the secondary movable plate 3 and the tertiary movable plate 2. Auxiliary rollers 5 are used at the bottom layer where the force is greater, which improves the positioning accuracy while increasing the rigidity and service life of the structure.

[0033] like Figure 1 and 2 , 3; the first dynamic shaft speed-increasing gear rack pair includes a short shaft, the short shaft moves through the first horizontal plate, the two ends of the short shaft are respectively fixed with a first gear 22 and a second gear 12, the outer walls of the first gear 22 and the second gear 12 are respectively engaged with a second spur rack 23 and a third spur rack 19, the second spur rack 23 is fixed to the bottom of the inner cavity of the first fixed body 4, and the third spur rack 19 is fixed to the inner wall of the three-stage movable plate 2;

[0034] When the power gear 14 drives the secondary moving plate 3 to move, the first gear 22 and the fixed second spur rack 23 are transmitted, so that the first gear 22 and the second gear 12 rotate, thereby driving the third spur rack 19 to move, thereby causing the tertiary moving plate 2 to move at twice the speed of the secondary moving plate 3;

[0035] like Figure 1 and 2, 3; the second drive shaft speed-increasing gear rack pair includes a third gear 13, a fourth spur rack 20 and a fifth spur rack 21. Mounting holes are provided on both sides of the inner side wall of the three-stage movable plate 2. The third gear 13 is rotatably mounted in the mounting hole. The fourth spur rack 20 is fixed to the inner side wall of the secondary movable plate 3. The fifth spur rack 21 is fixed to the tail end of the fourth-stage movable plate 1. The third gear 13 is engaged with the fourth spur rack 20 and the fifth spur rack 21 respectively;

[0036] In the process of the secondary movable plate 3 driving the tertiary movable plate 2 to move, the tertiary movable plate 2 moves at an increased speed, so that the third gear 13 and the fourth spur rack 20 act together, so that the third gear 13 can drive the fifth spur rack 21 to move, thereby driving the fourth movable plate 1 to move at a speed twice that of the tertiary movable plate 2.

[0037] The implementation principle of a heavy-duty bidirectional fork transmission structure of the present application is as follows: in actual use, the servo motor 6 drives the driving gear 15 to rotate after being decelerated by the reducer 8, thereby driving the driven gear 16 to rotate under the drive of the transmission chain 7, and then driving the short shaft to rotate, thereby driving the power gear 14 to rotate, and the power gear 14 drives the first spur rack 18 to move, thereby driving the secondary movable plate 3 to move, and when the secondary movable plate 3 moves, at this time, transmission is transmitted between the first gear 22 and the fixed second spur rack 23, so that the first gear 22 and the second gear 12 rotate, thereby driving the third spur rack 24 to move, thereby making the tertiary movable plate 2 move at twice the speed of the secondary movable plate 3, and the tertiary movable plate 2 moves at an increased speed, so that the third gear 13 and the fourth spur rack 20 act, so that the third gear 13 can drive the fifth spur rack 21 to move, thereby driving the fourth movable plate 1 to move at twice the speed of the third movable plate 2, thereby greatly improving the transmission accuracy between the transmission pairs, thereby improving the overall repeatability of the mechanism.

[0038] In addition, the components included in the heavy-duty bidirectional fork transmission structure of the present invention are all universal standard parts or components known to technical personnel in this field. The structure and principle can be known to technical personnel in this field through technical manuals or through conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adaptive monitoring computers and power supplies, are connected through wires. The specific connection means should refer to the following working principle. The electrical connection is completed in the order of working between each electrical component. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

Claims

1. A heavy-duty bidirectional fork transmission structure, comprising a primary fixed body (4), characterized in that: A secondary movable plate (3) is slidably mounted on both side walls of the inner cavity of the primary fixed body (4); a first transverse plate is fixed between the bottoms of the two secondary movable plates (3); a tertiary movable plate (2) is slidably connected to the inner side walls of the secondary movable plates (3); a second transverse plate is fixedly connected to the bottoms of the two tertiary movable plates (2); and a fourth movable plate (1) is slidably mounted on the inner side walls of the tertiary movable plates (2); A servo motor (6) and a reducer (8) are fixed to one side of the bottom of the first-level fixed body (4). The outer end of the servo motor (6) is connected to the reducer (8). The outer end of the power shaft of the reducer (8) is fixedly connected to a driving gear (15). The outer wall of the driving gear (15) is connected to a driven gear (16) through a transmission chain (7). A power shaft is fixed in the middle of one side wall of the driven gear (16). The power shaft movably passes through the corresponding side wall of the first-level fixed body (4) and is fixedly connected to the power gear (14). A first straight rack (18) is fixed to the outer wall of the second-level movable plate (3) corresponding to the power gear (14). The first straight rack (18) and the power gear (14) are meshed. A first dynamic shaft speed-increasing gear rack pair is installed between the second-level movable plate (3) and the first-level fixed body (4). A second dynamic shaft speed-increasing gear rack pair is installed between the second-level movable plate (3), the third-level movable plate (2) and the fourth-level movable plate (1).

2. A heavy-duty bidirectional fork transmission structure according to claim 1, characterized in that: The first moving shaft speed-increasing gear rack pair includes a short shaft, which is movable and passes through the first horizontal plate. A first gear (22) and a second gear (12) are fixed to both ends of the short shaft respectively. The outer walls of the first gear (22) and the second gear (12) are respectively engaged with a second straight rack (23) and a third straight rack (19). The second straight rack (23) is fixed to the bottom of the inner cavity of the first-stage fixed body (4), and the third straight rack (19) is fixed to the inner side wall of the third-stage movable plate (2).

3. The heavy-duty bidirectional fork transmission structure according to claim 1, characterized in that: The first drive shaft speed-increasing gear rack pair comprises a third gear (13), a fourth spur rack (20) and a fifth spur rack (21); mounting holes are provided on both sides of the inner side wall of the third-stage movable plate (2); the third gear (13) is rotatably mounted in the mounting hole; the fourth spur rack (20) is fixed to the inner side wall of the second-stage movable plate (3); the fifth spur rack (21) is fixed to the tail end of the fourth-stage movable plate (1); and the third gear (13) is respectively engaged with the fourth spur rack (20) and the fifth spur rack (21).

4. The heavy-duty bidirectional fork transmission structure according to claim 1, characterized in that: Auxiliary rollers (5) are rotatably mounted on the outer walls of one end of the secondary movable plate (3) and the tertiary movable plate (2).

5. The heavy-duty bidirectional fork transmission structure according to claim 1, characterized in that: A third slide rail (11) is fixed on the top of the three-stage movable plate (2), an outer wall of the third slide rail (11) is sleeved with an adapted third slider, and the third slider is fixedly connected to the four-stage movable plate (1).

6. The heavy-duty bidirectional fork transmission structure according to claim 1, characterized in that: The inner side wall of the secondary movable plate (3) is fixed with a second slide rail, the outer wall of the second slide rail is slidably sleeved with an adapted second slider (10), and the outer wall of the second slider (10) is fixedly connected to the outer wall of the tertiary movable plate (2).

7. The heavy-duty bidirectional fork transmission structure according to claim 1, characterized in that: A first slide rail is fixed to the bottom of the inner cavity of the primary fixed body (4) corresponding to the secondary movable plate (3); an outer wall of the first slide rail is slidably sleeved with an adapted first slider (9); the top of the first slider (9) is fixedly connected to the bottom of the secondary movable plate (3).

8. The heavy-duty bidirectional fork transmission structure according to claim 1, characterized in that: A carrier (17) is fixed to one side wall of the primary fixed body (4), and the power shaft of the reducer (8) movably passes through the carrier (17).

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