Gear and rack elevator with adjustable tension

Abstract

The present application relates to the technical field of hoist, in particular to a gear and rack hoist with adjustable tightness, which comprises vertically symmetrical C-shaped steel, a lifting seat is vertically arranged on one side of the upper part of the C-shaped steel, mounting frames are horizontally arranged on the four corners of the lifting seat close to one side of the C-shaped steel, rotating shafts are horizontally and symmetrically inserted into the mounting frames, rollers and guide wheels are coaxially arranged on one end of the rotating shafts, the rollers are inserted into the C-shaped steel, the outer periphery of the guide wheels abuts against the outer wall of the C-shaped steel, bearing seats are symmetrically arranged on the outer periphery of the rotating shafts, sliding seats are arranged at the bottom of the bearing seats, guide rails are symmetrically and slidingly inserted into the sliding seats, and the guide rails are fixed on both sides of the mounting frames. The present application can adjust the tightness, adjust the interval in real time according to the wear condition, adjust the interval of the rollers and the guide wheels according to the wear degree, reduce the replacement and maintenance frequency, and reduce the maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of hoisting technology, and more particularly to a gear and rack hoist with adjustable tension. Background Technology

[0002] A hoist is a mechanical device that transports materials by changing their potential energy. It meets production needs by lifting the bucket to a designated position on the equipment. It typically includes a column, a lifting device, and a lifting seat. The lifting device is located at the bottom of the column, and the lifting seat moves vertically along the column and is raised and lowered under the drive of the lifting device. A fork is provided in front of the lifting seat to lift the bucket.

[0003] Existing hoists mostly use hydraulic cylinders or wire ropes for lifting. While hydraulic cylinders offer better safety, they are costly, prone to oil leaks, and require extensive maintenance. For example, a simplified hoisting device disclosed in utility model patent CN211619332U uses wire ropes. During the lifting and winding process, the wire rope is prone to getting stuck and tangled in the middle of the drum, affecting its lifespan. Furthermore, it requires a large drum diameter, long axial winding distance, large rope deviation angle, and low control precision. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a gear and rack lifting machine with adjustable tension to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides a gear and rack lifting machine with adjustable tension.

[0006] An adjustable gear and rack lifting machine includes vertically symmetrically arranged C-shaped steel sections. A lifting seat is vertically positioned on one side of the upper part of each C-shaped steel section. Mounting brackets are horizontally positioned at each of the four corners of the lifting seat near the C-shaped steel section. Rotating shafts are symmetrically inserted into each mounting bracket. Rollers and guide wheels are coaxially mounted on one end of each rotating shaft. The rollers are inserted inside the C-shaped steel section. The outer circumferences of the guide wheels abut against the outer wall of the C-shaped steel section. Bearing seats are symmetrically mounted on the outer circumference of each rotating shaft. A sliding block is provided at the bottom of each bearing seat. Guide rails are symmetrically slidably inserted into the bottom of each sliding block. The guide rails are fixed to both sides of the mounting brackets. The top of each sliding block... The system includes a gantry frame, with an adjustment assembly on the upper part of each gantry frame for controlling the distance between the rollers and guide wheels. A fork is located on the side of the lifting seat away from the C-shaped steel, with fork feet on both sides of the fork. A speed reducer is installed inside the lifting seat, with a drive shaft inserted into its output end. The drive shaft rotates through the lifting seat, and a gear is fitted onto its end. A rack is vertically meshed on one side of the gear. L-shaped columns are symmetrically arranged vertically on the side of the C-shaped steel away from the lifting seat, with the rack vertically fixed to the inner wall of any L-shaped column. A drive motor is horizontally mounted on the outer wall of the lifting seat, with its output shaft coaxially connected to the input end of the speed reducer.

[0007] Furthermore, the adjustment assembly includes the same bidirectional screw threaded into the upper part of the gantry frame. One end of each bidirectional screw extends rotatably into the interior of the lifting seat, and each end is fitted with a worm gear. One side of each worm gear is vertically engaged with a worm, and each worm is rotatably connected to the lifting seat.

[0008] The above technical solution utilizes a worm gear and worm wheel to achieve reverse self-locking, preventing loosening. The bidirectional screw allows the rollers and guide wheels to move synchronously in opposite or the same direction, with adjustable tension and real-time adjustment of the spacing based on wear conditions.

[0009] Furthermore, each end of the worm gear is coaxially provided with a connecting sleeve. The worm gear and the connecting sleeve near the C-shaped steel are each slidably inserted with the same adjusting rod. The upper and lower outer circumferential surfaces of the adjusting rod are symmetrically fitted with inserts. Each connecting sleeve has an opening inside that matches the insert.

[0010] The above technical solution utilizes the engagement of the insert and the insert block to enable the connecting sleeve and the insert block to engage and disengage quickly, allowing the worm gear at different positions to be rotated and adjusted individually.

[0011] Furthermore, each of the adjustment rods is equipped with a pointer at its top, and each pointer has a vertical indicator plate on the side away from the adjustment rod. The indicator plates are fixed to the top of the lifting seat, and each indicator plate has an upper indicator area and a lower indicator area at its upper and lower ends, respectively. A suspended indicator area is provided in the middle of the indicator plate.

[0012] The above technical solution utilizes a pointer and indicator plate to clearly display the position of the insert. When it is necessary to adjust the distance between the upper roller and the guide wheel, pull the adjustment rod upward until the pointer is level with the upper indicator area. This indicates that the insert and the insert are coupled and can be adjusted. When it is necessary to adjust the distance between the lower roller and the guide wheel, the pointer should be level with the lower indicator area. Once the adjustment is complete, if the pointer is level with the suspended indicator area, it indicates that it is not coupled with any insert or insert, meaning that no worm gear can be adjusted.

[0013] Furthermore, each adjusting rod has a pin inserted into its top, and both ends of the pin have the same handle.

[0014] The above technical solution utilizes the combination of a grip and a pin to allow the grip to fold and drive the adjustment rod to rotate via the pin, effectively increasing transmission torque, reducing adjustment difficulty, and improving adjustment efficiency.

[0015] Furthermore, each lifting seat has a fixed seat on the top side near the handle, and the handle is slidably embedded inside the fixed seat.

[0016] The above technical solution utilizes a fixed base to store the handle, preventing it from falling off and rotating when not in use, thus preventing changes in the adjustment gap and improving safety during use.

[0017] Furthermore, the top of both the C-shaped steel and the L-shaped column is equipped with the same top support frame, and the bottom of both the C-shaped steel and the L-shaped column is equipped with the same rotating base.

[0018] The above technical solution utilizes a rotating chassis in conjunction with a top support frame, making it easy for the entire hoist to rotate.

[0019] Furthermore, a controller is located at the top of the rotating chassis, away from the lifting seat.

[0020] The above technical solution utilizes a controller to precisely control the direction and speed of the drive motor.

[0021] Furthermore, straight grooves are horizontally opened at the intersection of the rotating shaft and the mounting bracket.

[0022] The above technical solution utilizes a straight groove to prevent obstruction of the shaft's movement and improves the ease of adjustment.

[0023] Furthermore, the aforementioned reducer is a brake-type reducer.

[0024] The above technical solution utilizes a brake-type speed reducer to prevent goods from automatically descending under pressure when stationary.

[0025] The beneficial effects of this invention are:

[0026] 1. The present invention, through the setting of the adjustment component, can achieve reverse self-locking by using the worm gear and worm wheel to drive, preventing loosening, and the bidirectional screw can make the roller and guide wheel move synchronously in opposite or the same direction, the tension can be adjusted, and the spacing can be adjusted in real time according to the wear condition.

[0027] 2. The interlocking and interlocking of the insert and the interlocking block in this invention allow for rapid engagement and disengagement of the connecting sleeve and the interlocking block, enabling individual rotation and adjustment of the worm gear at different positions, and allowing individual adjustment of the gaps between rollers and guide wheels with different degrees of wear, reducing the number of replacements or repairs and lowering maintenance costs.

[0028] 3. The gear of the present invention rotates under the drive of the drive assembly, and because the rack is fixed, the gear will move up and down along the rack under the meshing action of the gear, thereby realizing the lifting of the lifting seat. The lifting seat is correspondingly connected to the fork for loading the material. The device has a simple structure, is easy to install, and is safe to use. The gear and rack have low precision requirements and can save costs. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0031] Figure 2 This is a side view of the structure according to an embodiment of the present invention;

[0032] Figure 3 This is a top view of the structure according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the driving structure according to an embodiment of the present invention;

[0034] Figure 5 Embodiments of the present invention Figure 3 A magnified schematic diagram of the local machining at point B;

[0035] Figure 6 This is a schematic diagram of the adjustment component structure according to an embodiment of the present invention;

[0036] Figure 7 Embodiments of the present invention Figure 2 A magnified schematic diagram of the partial machining at point A;

[0037] Figure 8 Embodiments of the present invention Figure 4 A magnified schematic diagram of the local machining at point C.

[0038] The diagram is marked as follows:

[0039] 1. Rotating chassis; 2. Controller; 3. C-shaped steel; 4. Lifting seat; 5. Fork frame; 6. Fork feet; 7. Mounting bracket; 8. Guide rail; 9. Slide seat; 10. Bearing seat; 11. Rotating shaft; 12. Roller; 13. Guide wheel; 14. Straight groove; 15. Gantry frame; 16. Double-acting screw; 17. Worm gear; 18. Worm; 19. Adjusting rod; 20. Insert; 21. Connecting sleeve; 2101. Insert; 22. Pin; 23. Handle; 24. Fixed seat; 25. Pointer; 26. Indicator plate; 27. Upper indicating area; 28. Lower indicating area; 29. ​​Suspended indicating area; 30. Drive shaft; 31. Reducer; 32. Drive motor; 33. Gear; 34. Rack; 35. L-shaped column; 36. Top support frame. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0041] See Figures 1 to 8 A gear and rack lifting machine with adjustable tension includes vertically symmetrically arranged C-shaped steels 3. A lifting seat 4 is vertically provided on one side of the upper part of each C-shaped steel 3. Mounting brackets 7 are horizontally provided at each of the four corners of the lifting seat 4 near the C-shaped steel 3. Rotating shafts 11 are symmetrically inserted into each mounting bracket 7. Rollers 12 and guide wheels 13 are coaxially sleeved near one end of each rotating shaft 11. The rollers 12 are inserted inside the C-shaped steel 3. The outer circumference of each guide wheel 13 abuts against the outer wall of the C-shaped steel 3. Bearing seats 10 are symmetrically sleeved on the outer circumference of each rotating shaft 11. A sliding seat 9 is provided at the bottom of each bearing seat 10. Guide rails 8 are symmetrically slidably inserted into the bottom of each sliding seat 9. The guide rails 8 are fixed to both sides of the mounting brackets 7. A gantry frame 1 is provided at the top of each sliding seat 9. 5. The upper part of the gantry frame 15 is provided with an adjustment component for controlling the distance between the roller 12 and the guide wheel 13. The lifting seat 4 is provided with a fork 5 on the side away from the C-shaped steel 3. The fork 5 is provided with fork feet 6 on both sides. The lifting seat 4 is provided with a reducer 31. The output end of the reducer 31 is inserted with a drive shaft 30. The drive shaft 30 rotates through the lifting seat 4. The end of the drive shaft 30 is fitted with a gear 33. A rack 34 is vertically meshed on one side of the gear 33. The C-shaped steel 3 is vertically symmetrically provided with L-shaped columns 35 on the side away from the lifting seat 4. The rack 34 is vertically fixed to the inner wall of any L-shaped column 35. The outer wall of the lifting seat 4 is provided with a drive motor 32 horizontally. The output shaft of the drive motor 32 is coaxially connected to the input end of the reducer 31.

[0042] Specifically, please refer to 6. The adjustment assembly includes the same bidirectional screw 16 threaded into the upper part of the gantry frame 15. One end of each bidirectional screw 16 extends rotatably into the inside of the lifting seat 4, and each end is fitted with a worm gear 17. One side of each worm gear 17 is vertically engaged with a worm 18. The worm 18 is rotatably connected to the lifting seat 4. The worm 18 and the worm gear 17 work together to achieve reverse self-locking and prevent loosening. The bidirectional screw 16 can make the roller 12 and the guide wheel 13 move synchronously in opposite directions or in the same direction, and the tension can be adjusted. The spacing can also be adjusted in real time according to the wear condition.

[0043] For details, please refer to Figure 8The worm 18 is coaxially provided with a connecting sleeve 21 at each end. The worm 18 and the connecting sleeve 21 near the C-shaped steel 3 are each slidably inserted with the same adjusting rod 19. The upper and lower outer circumferential surfaces of the adjusting rod 19 are symmetrically fitted with inserts 20. The connecting sleeve 21 is provided with a fitting slot 2101 that matches the insert 20. By using the fitting slot 2101 to cooperate with the insert 20, the connecting sleeve 21 and the insert 20 can be quickly engaged and disengaged, so that the worm 18 in different positions can be rotated and adjusted individually.

[0044] For details, please refer to Figure 7 Each adjusting rod 19 has a pointer 25 at its top. Each pointer 25 has a vertical indicator plate 26 on the side furthest from the adjusting rod 19. The indicator plates 26 are fixed to the top of the lifting seat 4. Each indicator plate 26 has an upper indicator area 27 and a lower indicator area 28 at its upper and lower ends, respectively. A suspended indicator area 29 is located in the middle of the indicator plate 26. Using the pointer 25 and indicator plate 26, the position of the insert 20 can be clearly displayed. When adjusting the distance between the upper roller 12 and guide wheel 13, the adjusting rod 19 is pulled upwards until the pointer 25 is level with the upper indicator area 27. This indicates that the insert 2101 and the insert 20 are coupled and can be adjusted. When adjusting the distance between the lower roller 12 and guide wheel 13, the pointer 25 is level with the lower indicator area 28. Once the adjustment is complete, the pointer 25 being level with the suspended indicator area 29 indicates that neither the insert 20 nor the insert 2101 is coupled, meaning that no adjustment of any worm gear 18 is possible.

[0045] For details, please refer to Figure 8 Each adjusting rod 19 has a pin 22 inserted into its top. Both ends of the pin 22 have the same handle 23. By using the handle 23 in conjunction with the pin 22, the handle 23 can be folded and can drive the adjusting rod 19 to rotate through the pin 22, which effectively increases the transmission torque, reduces the difficulty of adjustment, and improves the adjustment efficiency.

[0046] For details, please refer to Figure 8 Each lifting seat 4 has a fixed seat 24 on the top side near the handle 23. The handle 23 is slidably embedded in the fixed seat 24. The fixed seat 24 is used to store the handle 23, preventing the handle 23 from falling off and rotating when not in use, preventing the adjustment gap from changing, and improving the safety of use.

[0047] For details, please refer to Figure 1 The top of the C-shaped steel 3 and the L-shaped column 35 are both provided with the same top support frame 36, and the bottom of the C-shaped steel 3 and the L-shaped column 35 are both provided with the same rotating base 1. By using the rotating base 1 in conjunction with the top support frame 36, the entire hoist can be easily rotated.

[0048] For details, please refer to Figure 2 A controller 2 is provided at the top of the rotating chassis 1 away from the lifting seat 4. The controller 2 is used to precisely control the direction and speed of the drive motor 32.

[0049] Specifically, please refer to the figure. A straight groove 14 is provided laterally at the intersection of the rotating shaft 11 and the mounting bracket 7. The straight groove 14 is used to prevent the movement of the rotating shaft 11 from being obstructed and to improve the convenience of adjustment.

[0050] For details, please refer to Figure 4 The reducer 31 is a brake-type reducer, which is used to prevent the cargo from automatically falling under pressure when stationary.

[0051] The gear 33 rotates under the drive of the drive assembly, and because the rack 34 is fixed, the gear 33 will move up and down along the rack 34 under its meshing action, thereby realizing the lifting of the lifting seat 4. The lifting seat 4 is connected to the fork 5 for loading the material. This device has a simple structure, is easy to install, and is safe to use. The gear and rack have low precision requirements and can save costs.

[0052] This device adopts an assembly structure. The rack 34 is fixed to the corresponding installation position inside the L-shaped column 35 with bolts to complete the assembly of the device, which is convenient for assembly and disassembly.

[0053] Roller 12 is used to withstand the overturning force caused by the load at the front end of the lifting seat 4, and at the same time improves the smoothness of the slider movement. Therefore, roller 12 wears a lot, and the wear of the lower roller 12 is greater than that of the upper roller. Therefore, each dead angle needs to be adjusted individually. During adjustment, pointer 25 cooperates with indicator plate 26 to clearly show the position of the insert 20. When it is necessary to adjust the distance between the upper roller 12 and the guide wheel 13, pull the adjusting rod 19 upward until pointer 25 is level with the upper indicator area 27. This indicates that the insert 2101 and the insert 20 are coupled and can be adjusted. When it is necessary to adjust the distance between the lower roller 12 and the guide wheel 13, pointer 25 is level with the lower indicator area 28. After adjustment, pointer 25 is level with the suspended indicator area 29, which means that it is not coupled with any insert 20 and insert 2101, and that no worm gear 18 can be adjusted.

[0054] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A gear and rack lifting machine with adjustable tension, comprising vertically symmetrically arranged C-shaped steel (3), characterized in that, A lifting seat (4) is vertically provided on one side of the upper part of the C-shaped steel (3). At the four corners of the lifting seat (4) near the C-shaped steel (3), mounting brackets (7) are horizontally provided. Each mounting bracket (7) has a symmetrically inserted rotating shaft (11). Near one end of each rotating shaft (11), a roller (12) and a guide wheel (13) are coaxially fitted. The rollers (12) are inserted inside the C-shaped steel (3). The outer circumference of each guide wheel (13) abuts against the outer wall of the C-shaped steel (3). Bearing seats (10) are symmetrically fitted on the outer circumference of each rotating shaft (11). Each bearing seat (10) has a sliding block (9) at its bottom. Each sliding block (9) has a symmetrically slidably inserted guide rail (8) at its bottom. The guide rails (8) are fixed to both sides of the mounting bracket (7). A gantry frame (15) is provided on the top of each sliding block (9). The upper part of each gantry frame (15) is provided with a... An adjustment assembly for controlling the distance between the roller (12) and the guide wheel (13) is provided. The lifting seat (4) is provided with a fork (5) on the side away from the C-shaped steel (3). The fork (5) is provided with fork feet (6) on both sides. The lifting seat (4) is provided with a reducer (31). The output end of the reducer (31) is provided with a drive shaft (30). The drive shaft (30) rotates through the lifting seat (4). The end of the drive shaft (30) is provided with a gear (33). A rack (34) is vertically meshed on one side of the gear (33). The C-shaped steel (3) is vertically symmetrically provided with L-shaped columns (35) on the side away from the lifting seat (4). The rack (34) is vertically fixed to the inner wall of any L-shaped column (35). The outer wall of the lifting seat (4) is provided with a drive motor (32) in the horizontal direction. The output shaft of the drive motor (32) is coaxially connected to the input end of the reducer (31). The adjustment assembly includes a single bidirectional screw (16) threaded into the upper part of the gantry (15). One end of each bidirectional screw (16) extends rotatably into the inside of the lifting seat (4), and each end is fitted with a worm gear (17). One side of each worm gear (17) is vertically engaged with a worm (18), and each worm (18) is rotatably connected to the lifting seat (4). The worm (18) is coaxially provided with a connecting sleeve (21) at its end. The worm (18) and the connecting sleeve (21) near the C-shaped steel (3) are each slidably inserted with the same adjusting rod (19). The upper and lower outer circumferential surfaces of the adjusting rod (19) are symmetrically fitted with inserts (20). The connecting sleeve (21) is provided with a fitting slot (2101) that matches the insert (20). Each of the adjusting rods (19) is provided with a pointer (25) at the top. Each pointer (25) is provided with an indicator plate (26) on the side away from the adjusting rod (19). Each indicator plate (26) is fixed to the top of the lifting seat (4). Each indicator plate (26) is provided with an upper indicator area (27) and a lower indicator area (28) at the upper and lower ends respectively. A suspended indicator area (29) is provided in the middle of the indicator plate (26). The top of each adjusting rod (19) is rotatably inserted with a pin (22), and both ends of the pin (22) are provided with the same handle (23).

2. The adjustable gear and rack elevator according to claim 1, characterized in that, Each of the lifting seats (4) has a fixed seat (24) on the side near the handle (23) at the top, and the handle (23) is slidably embedded inside the fixed seat (24).

3. The adjustable gear and rack elevator according to claim 2, characterized in that, The top of the C-shaped steel (3) and the L-shaped column (35) are provided with the same top support frame (36), and the bottom of the C-shaped steel (3) and the L-shaped column (35) are provided with the same rotating base (1).

4. The adjustable gear and rack elevator according to claim 3, characterized in that, The top of the rotating chassis (1) is equipped with a controller (2) at the end away from the lifting seat (4).

5. A gear and rack lifting machine with adjustable tension according to claim 4, characterized in that, A straight groove (14) is provided laterally at the intersection of the rotating shaft (11) and the mounting bracket (7).

6. The adjustable gear and rack elevator according to claim 5, characterized in that, The speed reducer (31) is a brake-type speed reducer.

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