Multi-stage gear reducer for hoisting protection

Abstract

The invention relates to the technical field of speed reducer equipment, and particularly discloses a multi-stage gear speed reducer for hoisting protection, which comprises a main body structure and a driving structure, and the driving structure is fixedly arranged on the main body structure; the driving structure is used for providing power, an output shaft of the driving structure is adjustable, the main body structure is used for adjusting transposition and achieving different transmission coefficients, and the device has the advantages of being flexible in transmission coefficient adjustment, wide in application scene, suitable for adjustment and control of more complex lifting loads or light loads, convenient and fast to operate, efficient in switching, high in practicability and the like. The position of the speed reducer body does not need to be manually adjusted, operation steps and time cost are reduced, and the practicability and safety of equipment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of reducer equipment, in particular to a multi-stage gear reducer for lifting protection. Background Art

[0002] In lifting machinery operations, reducers are core components for power transmission, and their performance directly affects the operating stability, load capacity, and safety protection of lifting equipment. Traditional reducers for lifting are mostly designed with fixed transmission ratios, which can only meet the power output requirements under a single working condition and are difficult to adapt to complex lifting scenarios with different loads and operating speeds. When lifting equipment needs to switch between high speed under light load and low speed under heavy load, traditional reducers need to be shut down to replace equipment with different transmission ratios. This operation is not only cumbersome and time-consuming, but also may lead to reduced equipment connection accuracy due to frequent replacement, increased mechanical wear and safety hazards. Based on the above-mentioned deficiencies of the existing technology, the present invention proposes a multi-stage gear reducer for lifting protection. Through the transposition adjustment of the main structure and the flexible docking of the drive structure, it realizes the rapid switching of different transmission coefficients and multi-stage deceleration function, thereby improving the adaptability and safety of the lifting equipment. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problems of existing reducers with fixed transmission coefficients and inconvenient switching between light and heavy loads, and to provide a multi-stage gear reducer for lifting protection. To achieve the purpose of the present invention, the following technical solutions are adopted.

[0004] In order to solve the above-mentioned problem, the present invention provides the following technical solution: a multi-stage gear reducer for lifting protection, comprising a main structure and a drive structure, wherein the drive structure is fixedly arranged on the main structure; the drive structure is used to provide power, and the output shaft of the drive structure is adjustable, and the main structure is used to adjust the transposition to achieve different transmission coefficients.

[0005] Preferably, the main structure includes a control box, a transposition assembly, a first bracket, an inner ring, a second bracket, an outer ring and two pairs of reducer bodies; an axial hole is provided in the middle of the upper wall of the control box, the transposition assembly is fixedly arranged in the middle of the control box, the first bracket is fixedly arranged on the transposition assembly, the inner ring is fixedly arranged on the outside of the first bracket, the second bracket is fixedly arranged on the transposition assembly, and the second bracket is located below the first bracket, the outer ring is fixedly arranged on the second bracket, and the outer ring is movably mounted on the outside of the inner ring, the two pairs of reducer bodies are symmetrically arranged on the upper wall of the inner ring and the upper wall of the outer ring, and the input end and output end of the two pairs of reducer bodies are provided with docking interfaces.

[0006] Preferably, the shifting assembly includes a base frame, an axis frame, a pair of first sleeves, a pair of telescopic rods, a through shaft, a first gear, a first motor, a pair of second gears, a pair of springs, a pair of turntables, a first electric slide rail and a supporting arm; the base frame is fixedly arranged on the lower wall of the control box, the axis frame is concave, the axis frame is fixedly arranged on the base frame and is located below the axis hole, a pair of first sleeves are respectively movable through the upper and lower ends of the axis frame, one end of a pair of telescopic rods are respectively movable through the first sleeves, and the telescopic rods can be lifted and moved, the telescopic rods rotate on the axis frame through the first sleeve, one end of the through shaft is fixedly arranged on one of the telescopic rods, and the other end of the through shaft is movable through the other telescopic rod, the through shaft and the other telescopic rod both pass through the axis hole, the The first gear is fixedly arranged in the middle of the shaft frame, the first motor is fixedly arranged on the shaft frame, and the driving end of the first motor is connected to the first gear, and the first gear is driven to rotate by the first motor, a pair of the second gears are respectively fixedly arranged on the telescopic rod, and the second gears are respectively located symmetrically on the upper and lower sides of the first gear, a pair of the second gears are respectively meshed with the first gear, a pair of the springs are respectively movably mounted on the telescopic rod, and the springs are located between the shaft frame and the second gear, a pair of the turntables are respectively fixedly mounted on the telescopic rod, and the turntables are respectively located above and below the two ends of the shaft frame, the diameter of the turntable is larger than the diameter of the second gear, the first electric slide rail is vertically arranged on one end of the shaft frame, and one end of the support arm is fixedly arranged on the first electric slide rail.

[0007] Preferably, the support arm is lifted and lowered by a first electric slide rail, and the other end of the support arm can contact the turntable.

[0008] Preferably, the driving structure includes a hanger, a chassis, a transmission shaft, a second motor, a pair of third gears, a second electric slide rail, a movable arm, a second sleeve and a telescopic shaft; one end of the hanger is fixedly set in the middle of the left side of the control box, and the other end of the hanger is located above the middle of the inner ring. The chassis is L-shaped, and the chassis is fixedly set on the other end of the hanger, and the two ends of the transmission shaft respectively pass through the front and rear side walls of the chassis, the second motor is fixedly set in the chassis, a pair of the third gears are respectively fixedly sleeved on the transmission shaft and the driving end of the second motor, and a pair of the third gears are relatively meshed, the second electric slide rail is fixedly set in the middle of the upper wall of the chassis, one end of the movable arm is fixedly set on the second electric slide rail, the second sleeve movably passes through the other end of the movable arm, and the second sleeve corresponds to the transmission shaft, one end of the telescopic shaft is movably inserted in the transmission shaft, the other end of the telescopic shaft is fixedly passed through the second sleeve, and the telescopic shaft rotates on the movable arm through the second sleeve.

[0009] Preferably, in order to achieve multi-stage deceleration, the reducer bodies on the inner ring and the outer ring can be arranged relative to each other and connected through a docking assembly.

[0010] Preferably, the docking assembly includes a docking shaft, a gear rod and a nut. The docking shaft is the same as the telescopic shaft. Both ends of the docking shaft can be detachably installed between the input end and the output end of the reducer body, and a gear groove is provided through the middle of the docking shaft. One end of the gear rod can be movably passed through the gear groove of the docking shaft. The nut is movably screwed on the docking shaft, and the docking shaft is limited by the gear rod.

[0011] Preferably, the telescopic shaft can be inserted and connected to the input end of the reducer body.

[0012] Preferably, the inner ring and the outer ring are respectively arranged on the through shaft and another telescopic rod, and the inner ring and the outer ring can rotate synchronously in opposite directions or the inner ring and the outer ring can rotate independently.

[0013] The multi-stage gear reducer for lifting protection proposed by the present invention has the following beneficial effects: 1. Independent switching of multiple coefficients: The inner ring and outer ring can be rotated independently or rotated in opposite directions synchronously through the transposition component, so that the reducer bodies with four different transmission coefficients can be connected to the drive structure respectively. When used separately, the four transmission coefficients can be quickly switched to meet the requirements of different working conditions such as light load high speed and heavy load low speed.

[0014] 2. Multi-stage combination expansion: When two reducer bodies are used in series through a docking assembly, six different combined transmission coefficients can be formed (based on the two-by-two combination of four independent coefficients), further expanding the deceleration range and adapting to more complex lifting load control scenarios.

[0015] 3. Automatic transposition adjustment: With the help of the first motor, electric slide and other driving components in the transposition assembly, the inner and outer rings can be automatically rotated and positioned, eliminating the need for manual adjustment of the reducer main body position, reducing operating steps and time costs.

[0016] 4. Stable and reliable docking: The drive structure drives the telescopic shaft to flexibly extend and retract through the second electric slide rail, and can automatically adjust the extension length according to the docking object (the reducer body on the inner ring or outer ring) to ensure accurate docking with the docking interface of the reducer body, avoiding transmission instability caused by manual docking errors.

[0017] 5. Optimization of coaxial and directional transmission: The inner ring and outer ring adopt a coaxial nested design, which cooperates with the gear transmission of the transposition component (the first gear meshes with the upper and lower second gears) to achieve stable reverse synchronous rotation, ensure the position accuracy of the reducer body during the transposition process, and reduce mechanical interference; the docking component uses the gear rod and nut to achieve axial limitation after the reducer body is connected in series, to avoid the docking shaft from falling off due to vibration during the transmission process.

[0018] 6. Adapt to the needs of lifting protection: Through the flexible regulation of multi-coefficient and multi-stage reduction, it can accurately match the different power requirements of light load and heavy load in lifting operations, reduce equipment overload or insufficient power due to transmission mismatch, and improve the reliability of lifting protection; multi-coefficient adjustment can be achieved without frequent replacement of the reducer body, reducing the disassembly and wear of mechanical parts and extending the service life of the equipment; at the same time, the modular component design facilitates individual replacement, reducing maintenance difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the assembly structure of the present invention; Figure 2 This is a schematic diagram of the main structure assembly structure of the present invention; Figure 3 This is a schematic diagram of the disassembled and enlarged structure of the transposition component of the present invention; Figure 4 This is a schematic diagram of the enlarged structure of the transposition component assembly of the present invention; Figure 5 This is a schematic diagram of the split structure of the driving structure of the present invention; Figure 6 This is a diagram showing the driving structure of the present invention; Figure 7 for Figure 2 A local enlarged structural diagram in FIG. Figure 8 This is a schematic diagram of the disassembled structure of the docking assembly of the present invention.

[0020] In the figure: 1. Main structure, 11. Control box, 12. Transposition assembly, 120. Base frame, 121. Axle frame, 122. First seat, 123. Telescopic rod, 124. Through shaft, 125. First gear, 126. First motor, 127. Second gear, 128. Spring, 129. Turntable, 130. First electric slide rail, 131. Support arm, 13. First bracket, 14. Inner ring, 15. Second bracket, 16. Outer ring, 17. Reducer body, 2. Drive structure, 21. Hanger, 22. Chassis, 23. Drive shaft, 24. Second motor, 25. Third gear, 26. Second electric slide rail, 27. Moving arm, 28. Second seat, 29. Telescopic shaft, 3. Docking assembly, 31. Docking shaft, 32. Stop groove, 33. Gear rod, 34. Nut, 4. Docking port. DETAILED DESCRIPTION

[0021] The following is a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings.

[0022] like Figures 1-8As shown, the present invention provides a technical solution: a multi-stage gear reducer for lifting protection, comprising a main structure 1 and a drive structure 2, wherein the drive structure 2 is fixedly arranged on the main structure 1; the drive structure 2 is used to provide power, and the output shaft of the drive structure 2 is adjustable, and the main structure 1 is used to adjust the transposition to achieve different transmission coefficients.

[0023] As a further solution of the present invention, the main structure 1 includes a control box 11, a transposition component 12, a first bracket 13, an inner ring 14, a second bracket 15, an outer ring 16 and two pairs of reducer bodies 17; an axial hole is provided in the middle of the upper wall of the control box 11, the transposition component 12 is fixedly arranged in the middle of the control box 11, the first bracket 13 is fixedly arranged on the transposition component 12, the inner ring 14 is fixedly arranged on the outside of the first bracket 13, the second bracket 15 is fixedly arranged on the transposition component 12, and the second bracket 15 is located below the first bracket 13, the outer ring 16 is fixedly arranged It is placed on the second bracket 15, and the outer ring 16 is movably mounted on the outside of the inner ring 14. The two pairs of reducer bodies 17 are symmetrically arranged on the upper wall of the inner ring 14 and the upper wall of the outer ring 16, respectively. The input end and the output end of the two pairs of reducer bodies 17 are both provided with a docking port 4; the control box 11 carries the transposition component 12, and the transposition component 12 controls the rotation of the inner ring 14 and the outer ring 16 on the first bracket 13 and the second bracket 15 to achieve the transposition of the reducer body 17 on the inner ring 14 and the outer ring 16. The reducer body 17 can have different transmission coefficients and be used for different transmissions.

[0024] More specifically, when the transmission coefficient needs to be adjusted, the action of the transposition component 12 is controlled to drive the first bracket 13 and the second bracket 15 to move respectively, thereby causing the inner ring 14 and the outer ring 16 fixed thereon to rotate relative to each other or shift their positions, thereby realizing the transposition between the reducer body 17 on the inner ring 14 and the reducer body 17 on the outer ring 16; since different reducer bodies 17 have different transmission coefficients, the overall transmission coefficient can be changed by switching the reducer body 17 participating in the transmission to adapt to the working conditions of different loads and different speeds in lifting operations.

[0025] As a further solution of the present invention, the transposition component 12 includes a base frame 120, an axis frame 121, a pair of first sleeves 122, a pair of telescopic rods 123, a through shaft 124, a first gear 125, a first motor 126, a pair of second gears 127, a pair of springs 128, a pair of turntables 129, a first electric slide rail 130 and a support arm 131; the base frame 120 is fixedly arranged on the lower wall of the control box 11, the axis frame 121 is concave, the axis frame 121 is fixedly arranged on the base frame 120 and is located below the axis hole, a pair of the first sleeves 122 are respectively movable through the upper and lower ends of the axis frame 121, and one end of a pair of the telescopic rods 123 are respectively movable through the first sleeve 122, and the telescopic rods 123 can be raised and lowered The telescopic rod 123 is rotated on the shaft frame 121 through the first sleeve 122, one end of the through shaft 124 is fixed on one of the telescopic rods 123, and the other end of the through shaft 124 is movable through the other telescopic rod 123, the through shaft 124 and the other telescopic rod 123 are both through the shaft hole, the first gear 125 is fixedly set in the middle of the shaft frame 121, the first motor 126 is fixedly set on the shaft frame 121, and the driving end of the first motor 126 is connected to the first gear 125, the first gear 125 is driven to rotate by the first motor 126, a pair of second gears 127 are respectively fixed on the telescopic rod 123, and the second gears 127 are respectively located on the upper and lower sides of the first gear 125 Symmetrically, a pair of second gears 127 are respectively engaged with the first gear 125, a pair of springs 128 are respectively movably mounted on the telescopic rod 123, and the springs 128 are located between the shaft frame 121 and the second gear 127, a pair of turntables 129 are respectively fixedly mounted on the telescopic rod 123, and the turntables 129 are respectively located above and below the two ends of the shaft frame 121, the diameter of the turntables 129 is larger than the diameter of the second gear 127, the first electric slide 130 is vertically arranged on one end of the shaft frame 121, one end of the support arm 131 is fixedly arranged on the first electric slide rail 130, and the support arm 131 is lifted and lowered by the first electric slide rail 130, and the other end of the support arm 131 can contact the turntable 129; The first motor 126 is started to drive the first gear 125 to rotate, and the first gear 125 is engaged with the second gear 127 symmetrically arranged above and below, driving the second gear 127 to rotate on the first sleeve 122 through the telescopic rod 123 with the help of the first sleeve 122, thereby realizing the opposite rotation of the through shaft 124 on one of the telescopic rods 123 and the other telescopic rod 123, and the first driving slide rail drives the supporting arm 131 to move up or down, and uses the supporting arm 131 to apply force to the turntable 129 on the telescopic rod 123, driving the second gear 127 to rise or fall, and disengage from the first gear 125. Then, the first gear 125 drives one of the second gears 127 to rotate, and realizes the inner ring 14 to rotate alone or the outer ring 16 to rotate alone.

[0026] More specifically, if the inner ring 14 needs to rotate alone, the first electric slide rail 130 is controlled to drive the support arm 131 to rise, and the end of the support arm 131 contacts the lower end surface of the upper turntable 129 and applies an upward thrust, forcing the upper telescopic rod 123 to overcome the elastic force of the spring 128 and move upward, and the telescopic rod 123 passes through the first sleeve 122, driving the upper second gear 127 to disengage from the engagement with the first gear 125; at this time, the first motor 126 only drives the lower second gear 127 to rotate, and drives the through shaft 124 to rotate through the lower telescopic rod 123, while the telescopic rod 123 that fixes the outer ring 16 stops rotating, thereby realizing the independent rotation of the inner ring 14 and the corresponding reducer body 17.

[0027] As a further solution of the present invention, the driving structure 2 includes a hanger 21, a chassis 22, a transmission shaft 23, a second motor 24, a pair of third gears 25, a second electric slide 26, a movable arm 27, a second sleeve 28 and a telescopic shaft 29; one end of the hanger 21 is fixedly arranged in the middle of the left side of the control box 11, and the other end of the hanger 21 is located above the middle of the inner ring 14. The chassis 22 is L-shaped, and the chassis 22 is fixedly arranged on the other end of the hanger 21. The two ends of the transmission shaft 23 respectively pass through the front and rear side walls of the chassis 22. The second motor 24 is fixedly arranged in the chassis 22. A pair of the third gears 25 are respectively fixedly sleeved on the transmission shaft 23 and the driving end of the second motor 24. The pair of the third gears 25 are relatively meshed. The second electric slide 26 is fixedly arranged in the middle of the upper wall of the chassis 22. One end of the movable arm 27 is fixedly arranged on the second electric slide On the rail 26, the second seat 28 movably passes through the other end of the movable arm 27, and the second seat 28 corresponds to the transmission shaft 23. One end of the telescopic shaft 29 is movably inserted in the transmission shaft 23, and the other end of the telescopic shaft 29 is fixedly passed through the second seat 28, and the telescopic shaft 29 rotates on the movable arm 27 through the second sleeve shaft; the chassis 22 is suspended in the middle of the inner ring 14 through the hanger 21, so that the chassis 22 corresponds to the reducer body 17. As the reducer body 17 is replaced, the second motor 24 is connected to different reducer bodies 17 for transmission. When the chassis 22 is separately opposite to the reducer body 17 on the inner ring 14 or the reducer body 17 on the outer ring 16, the movable arm 27 is driven to move by the second electric slide rail 26, so that the telescopic shaft 29 is extended and retracted from the transmission shaft 23, and the telescopic shaft 29 is inserted into the docking interface 4 of the reducer body 17 for connection and transmission.

[0028] More specifically, the driving structure 2 can flexibly adapt to the transposition adjustment of the reducer body 17, achieve fast and stable connection with the reducer body 17 with different transmission coefficients, and ensure the continuity and reliability of power transmission.

[0029] As a further solution of the present invention, in order to achieve multi-stage reduction, the reducer body 17 on the inner ring 14 and the outer ring 16 can be arranged relative to each other and connected through a docking assembly 3.

[0030] As a further solution of the present invention, the docking assembly 3 includes a docking shaft 31, a shift rod 33 and a nut 34. The docking shaft 31 is the same as the telescopic shaft 29. The two ends of the docking shaft 31 are detachably installed between the input end and the output end of the reducer body 17, and a stop groove 32 is provided through the middle of the docking shaft 31. One end of the shift rod 33 movably passes through the stop groove 32 of the docking shaft 31, and the nut 34 is movably screwed on the docking shaft 31. The docking shaft 31 is limited by the shift rod 33. When the reducer body 17 on the inner ring 14 is opposite to the reducer body 17 on the outer ring 16 (the input / output docking interface 4 of the two is coaxially aligned), first insert one end of the docking shaft 31 into the output end docking interface 4 of the reducer body 17 on the inner ring 14 side, and the other end into the outer ring 16 side The input end docking interface 4 of the reducer body 17 realizes the physical series connection of the two reducer bodies 17 through the docking shaft 31; then one end of the shift rod 33 is radially passed through the retaining groove 32 in the middle of the docking shaft 31, so that the two ends of the shift rod 33 are respectively fitted with the end faces of the two reducer bodies 17 (the output end face of the inner ring side reducer body 17 and the input end face of the outer ring side reducer body 17), limiting the axial movement of the docking shaft 31; finally, the nut 34 is movably screwed to the two ends of the docking shaft 31, and the docking interface 4 of the docking shaft 31 and the reducer body 17 are tightened to complete the stable connection of the two reducer bodies 17; the docking assembly 3 is located as a whole between the two opposite reducer bodies 17, and is not in direct contact with the inner ring 14 and the outer ring 16, and is only indirectly related by connecting the reducer body 17.

[0031] More specifically, the two reducer bodies 17 on the inner ring 14 and the outer ring 16 are rigidly connected in series via the docking shaft 31 , and power is transmitted sequentially to achieve multi-stage reduction.

[0032] As a further solution of the present invention, the telescopic shaft 29 can be inserted into and connected to the input end of the reducer body 17 .

[0033] As a further solution of the present invention, the inner ring 14 and the outer ring 16 are respectively arranged on the through shaft 124 and another telescopic rod 123. The inner ring 14 and the outer ring 16 can rotate synchronously in opposite directions or the inner ring 14 and the outer ring 16 can rotate independently.

[0034] The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process. The specific operations are as follows.

[0035] When the transmission coefficients of the four reducer main bodies 17 are different, four transmission coefficients can be switched; Initial status check: Ensure that the telescopic shaft 29 is in the retracted state and not connected to any reducer body 17; select the target reducer body 17 and determine the reducer body 17 to be activated (either on the inner ring 14 or the outer ring 16) based on the required transmission coefficient; Then, the shifting assembly 12 is started. If the target reducer body 17 is on the outer ring 16, the first electric slide rail 130 on the base frame 120 is controlled to drive the supporting arm 131 to descend, pushing the lower turntable 129 so that the lower telescopic shaft 29 is forced to pass through the first sleeve 122 and descend, driving the lower second gear 127 to disengage from the first gear 125 on the shaft frame 121; then, the first motor 126 is started to drive the first gear 125 to drive the upper second gear 127 to rotate, thereby driving the upper telescopic rod 123 to rotate with the help of the first sleeve 122, thereby driving the outer ring 16 on the second bracket 15 to rotate until the target reducer body 17 is opposite to the driving structure 2; If the target reducer body 17 is on the inner ring 14, the first electric slide rail 130 on the control frame 120 drives the support arm 131 to descend, and the end of the support arm 131 contacts the upper end surface of the lower turntable 129 and applies a downward thrust, forcing the lower telescopic rod 123 to overcome the elastic force of the spring 128 and descend (the telescopic rod 123 moves along the first sleeve 122), driving the second gear 127 below to disengage from the meshing with the first gear 125 on the shaft frame 121 (that is, the transmission gear corresponding to the outer ring 16 is disengaged, and the outer ring 16 is kept At this time, the second gear 127 at the bottom is disengaged, and the second gear 127 at the top is reset by the force of the spring 128, maintaining engagement with the first gear 125; the first motor 126 is started to drive the first gear 125 to rotate the second gear 127 at the top, thereby driving the telescopic rod 123 at the top (rotating along the first sleeve 122), and driving the inner ring 14 on the first bracket 13 to rotate by means of the through shaft 124, until the target reducer body 17 on the inner ring 14 is opposite to the driving structure 2; Power docking: Start the second electric slide rail 26 on the chassis 22 in the drive structure 2, drive the movable arm 27 to move, and extend the telescopic shaft 29 from the transmission shaft 23. Insert one end of the telescopic shaft 29 into the input end docking port 4 of the target reducer body 17 to complete the docking; The transmission can be started: the second motor 24 is started, and the second motor 24 drives one of the third gears 25 to rotate. The meshing transmission of the third gear 25 drives the transmission shaft 23 to rotate, and the transmission shaft 23 drives the telescopic shaft 29 to rotate with the help of the second sleeve 28. The telescopic shaft 29 transmits the power to the reducer body 17 to achieve power output corresponding to the transmission coefficient.

[0036] When the dual reducer main body 17 is operated in series transmission (achieving six combined transmission coefficients); Select the reducer bodies 17 connected in series, and determine the two reducer bodies 17 to be connected in series on the inner ring 14 and the outer ring 16 according to the required multi-stage reduction coefficient; Adjusting the relative position: Control the support arm 131 of the first electric slide 130 to return to the initial position (the spring 128 pushes the second gear 127 to engage with the first gear 125); start the first motor 126, drive the first gear 125 to drive the upper and lower second gears 127 to rotate in the opposite direction, so that the inner ring 14 and the outer ring 16 rotate in the opposite direction synchronously until the two target reducer bodies 17 are relatively aligned. Or after the reducer bodies 17 on one of the inner ring 14 or outer ring 16 are aligned, then control the inner ring 14 or outer ring 16 separately to adjust the correspondence of the other reducer body 17; Connect the docking assembly 3: Insert the two ends of the docking shaft 31 into the output and input docking ports 4 of the two opposite reducer bodies 17 respectively; insert the shift rod 33 through the retaining groove 32 of the docking shaft 31 so that the two ends of the shift rod 33 are in contact with the end surface of the reducer body 17 to achieve position limiting; tighten the nuts 34 at both ends of the docking shaft 31 to fix the docking shaft 31 and the reducer body 17; Docking with the drive structure 2: Start the second electric slide rail 26 to drive the telescopic shaft 29 to extend and insert the input end of the reducer body 17 on the inner ring 14 of the series combination to connect to the interface 4; Start the multi-stage transmission: Start the second motor 24, and the power is transmitted to the rear end reducer body 17 through the telescopic shaft 29, the front end reducer body 17, and the docking shaft 31 in sequence, realizing the multi-stage reduction transmission.

[0037] In order to further improve the practicality of the equipment, the present invention can set the direction of the input end and the output end of the reducer body 17 according to the use requirements, thereby realizing the reduction transmission or the speed increase transmission.

[0038] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage gear reducer for lifting protection, characterized in that: The invention comprises a main structure (1) and a drive structure (2), wherein the drive structure (2) is fixedly arranged on the main structure (1); the drive structure (2) is used to provide power, and the output shaft of the drive structure (2) is adjustable, and the main structure (1) is used to adjust the transposition to achieve different transmission coefficients.

2. The multi-stage gear reducer for lifting protection according to claim 1, characterized in that: The main structure (1) includes a control box (11), a transposition assembly (12), a first bracket (13), an inner ring (14), a second bracket (15), an outer ring (16), and two pairs of reducer bodies (17); An axial hole is provided in the middle of the upper wall of the control box (11), the transposition component (12) is fixedly provided in the middle of the control box (11), the first bracket (13) is fixedly provided on the transposition component (12), the inner ring (14) is fixedly provided on the outside of the first bracket (13), the second bracket (15) is fixedly provided on the transposition component (12), and the second bracket (15) is located below the first bracket (13), the outer ring (16) is fixedly provided on the second bracket (15), and the outer ring (16) is movably sleeved on the outside of the inner ring (14), and the two pairs of reducer bodies (17) are symmetrically provided on the upper wall of the inner ring (14) and the upper wall of the outer ring (16), respectively, and the input end and the output end of the two pairs of reducer bodies (17) are both provided with a docking interface (4).

3. The multi-stage gear reducer for lifting protection according to claim 2, characterized in that: The transposition assembly (12) includes a base frame (120), an axis frame (121), a pair of first sleeve seats (122), a pair of telescopic rods (123), a through shaft (124), a first gear (125), a first motor (126), a pair of second gears (127), a pair of springs (128), a pair of turntables (129), a first electric slide rail (130) and a supporting arm (131); The base frame (120) is fixedly arranged on the lower wall of the control box (11), the shaft frame (121) is concave, the shaft frame (121) is fixedly arranged on the base frame (120) and is located below the shaft hole, a pair of the first sleeves (122) are respectively movable through the upper and lower ends of the shaft frame (121), a pair of the telescopic rods (123) are respectively movable through the first sleeve (122), and the telescopic rods (123) can be raised and lowered. The telescopic rods (123) are moved through the first sleeve ( 122) rotates on the shaft frame (121), one end of the through shaft (124) is fixedly arranged on one of the telescopic rods (123), and the other end of the through shaft (124) is movable through the other telescopic rod (123), the through shaft (124) and the other telescopic rod (123) are both passed through the shaft hole, the first gear (125) is fixedly arranged in the middle of the shaft frame (121), the first motor (126) is fixedly arranged on the shaft frame (121), and the first motor (126) drives The first end is connected to the first gear (125), the first gear (125) is driven to rotate by the first motor (126), a pair of the second gears (127) are respectively fixed on the telescopic rod (123), and the second gears (127) are respectively located on the upper and lower sides of the first gear (125) and symmetrically, the pair of the second gears (127) are respectively engaged with the first gear (125), and a pair of the springs (128) are respectively movably sleeved on the telescopic rod (123), and the springs (12 8) is located between the shaft frame (121) and the second gear (127), a pair of turntables (129) are fixedly mounted on the telescopic rod (123), and the turntables (129) are respectively located above and below the two ends of the shaft frame (121), the diameter of the turntable (129) is larger than the diameter of the second gear (127), the first electric slide rail (130) is vertically arranged on one end of the shaft frame (121), and one end of the support arm (131) is fixedly arranged on the first electric slide rail (130).

4. The multi-stage gear reducer for lifting protection according to claim 3, characterized in that: The support arm (131) is lifted and lowered by the first electric slide rail (130), and the other end of the support arm (131) is capable of contacting the turntable (129).

5. The multi-stage gear reducer for lifting protection according to claim 4, characterized in that: The driving structure (2) includes a hanger (21), a chassis (22), a transmission shaft (23), a second motor (24), a pair of third gears (25), a second electric slide rail (26), a movable arm (27), a second seat (28), and a telescopic shaft (29); One end of the hanger (21) is fixedly arranged in the middle of the left side of the control box (11), and the other end of the hanger (21) is located above the middle of the inner ring (14). The chassis (22) is L-shaped, and the chassis (22) is fixedly arranged on the other end of the hanger (21). The two ends of the transmission shaft (23) are movable through the front and rear side walls of the chassis (22). The second motor (24) is fixedly arranged in the chassis (22). A pair of the third gears (25) are fixedly mounted on the transmission shaft (23) and the driving end of the second motor (24). (25) are relatively engaged, the second electric slide rail (26) is fixedly arranged in the middle of the upper wall of the chassis (22), one end of the movable arm (27) is fixedly arranged on the second electric slide rail (26), the second sleeve (28) movably passes through the other end of the movable arm (27), and the second sleeve (28) corresponds to the transmission shaft (23), one end of the telescopic shaft (29) is movably inserted into the transmission shaft (23), the other end of the telescopic shaft (29) is fixedly passed through the second sleeve (28), and the telescopic shaft (29) rotates on the movable arm (27) through the second sleeve.

6. The multi-stage gear reducer for lifting protection according to claim 5, characterized in that: The reducer body (17) on the inner ring (14) and the outer ring (16) can be arranged relative to each other and connected via a docking assembly (3).

7. The multi-stage gear reducer for lifting protection according to claim 6, characterized in that: The docking assembly (3) comprises a docking shaft (31), a shift rod (33) and a nut (34); The docking shaft (31) is the same as the telescopic shaft (29), and both ends of the docking shaft (31) are detachably mounted between the input end and the output end of the reducer body (17), and a retaining groove (32) is provided through the middle of the docking shaft (31), one end of the shift rod (33) movably passes through the retaining groove (32) of the docking shaft (31), and the nut (34) is movably screwed onto the docking shaft (31), and the docking shaft (31) is limited by the shift rod (33).

8. The multi-stage gear reducer for lifting protection according to claim 7, characterized in that: The telescopic shaft (29) can be inserted into and connected to the input end of the reducer body (17).

9. The multi-stage gear reducer for lifting protection according to claim 8, characterized in that: The inner ring (14) and the outer ring (16) are respectively arranged on the through shaft (124) and another telescopic rod (123), and the inner ring (14) and the outer ring (16) can rotate synchronously in opposite directions or the inner ring (14) and the outer ring (16) can rotate independently.

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