CN217736180U

CN217736180U - Speed-regulating speed reducer

Info

Publication number: CN217736180U
Application number: CN202221778449.7U
Authority: CN
Inventors: 尤志锋
Original assignee: Jiangsu Jinchangcheng Speed Reducer Co ltd
Current assignee: Jiangsu Jinchangcheng Speed Reducer Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-11-04
Anticipated expiration: 2032-07-12

Abstract

The utility model relates to a speed reducer field provides a speed governing speed reducer. The input shaft is fixedly provided with two input gears, the intermediate shaft is fixedly provided with a fixed intermediate gear matched with the output shaft and a pair of movable intermediate gears correspondingly meshed with the two input gears, the intermediate shaft is provided with a sliding sleeve, the sliding sleeve is positioned between the pair of movable intermediate gears, and the inner side of the sliding sleeve is provided with inner teeth matched with outer teeth adjacent to the pair of intermediate gears; the lower box body is provided with a shifting fork structure, the shifting fork structure is connected with the sliding sleeve, and when the shifting fork structure shifts the sliding sleeve to slide along the key, the sliding sleeve is meshed with one movable intermediate gear at most. The shifting fork mechanism is used for realizing the switching of three working states, the positioning pin holes are used for ensuring the sliding sleeve to be adjusted in place and fixing the sliding sleeve, and the safety and the stability of the speed reducer are improved. The technical scheme has a simple structure, can realize the output of three states by utilizing the matching of the three shafts and the gears, and is suitable for various occasions.

Description

Speed-regulating speed reducer

Technical Field

The utility model relates to a speed reducer field, concretely relates to speed governing speed reducer.

Background

The reduction gear serves to match the rotational speed and the torque transmission between the prime mover and the working machine or the actuator, and is used in modern machines in a very wide range of applications. The speed reducer can be divided into two categories, namely a general speed reducer and a special speed reducer according to purposes. The special speed reducer is designed according to actual use occasions and is mainly designed on the aspects of speed reduction ratio, output mode, power of output speed ratio and the like. In some special applications, the speed reducer is required to have the functions of bidirectional output, reversing output, multi-reduction-ratio output and the like.

In the application occasions of hoisting or lifting, a speed reducer is required to output large torque and low rotating speed when the load is lifted; when the speed reducer is in no load, the torque required by the speed reducer is small, and the output speed is high; and in the loading gap, the speed reducer is required to be stopped, so that the energy consumption is reduced. If the machine is frequently stopped and started, the service life of the speed reducer is influenced, so that the output is not generally performed in the neutral gear. Therefore, the technical scheme provides a speed regulation speed reducer.

Disclosure of Invention

In order to satisfy the speed reduction demand of jack-up or promotion application, the utility model aims to provide a speed governing speed reducer that has three kinds of outputs of quick, slow speed and neutral gear.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

a speed-regulating speed reducer comprises a box body, an input shaft, an input gear, an intermediate shaft, an intermediate gear, an output shaft and an output gear, wherein the box body is divided into an upper box body and a lower box body, two ends of the input shaft, the intermediate shaft and the output shaft are respectively rotatably supported between the upper box body and the lower box body through bearing seats, the input gear is fixedly installed on the input shaft, the output gear is fixedly installed on the output shaft, the intermediate gear is installed on the intermediate shaft, the intermediate gear is correspondingly engaged with the input gear and the output gear, the input shaft is fixedly provided with two input gears, the intermediate shaft is fixedly provided with a fixed intermediate gear matched with the output shaft and a pair of movable intermediate gears correspondingly engaged with the two input gears, the pair of movable intermediate gears are duplicate gears, two end faces of each movable intermediate gear are provided with bearing holes and are provided with bearings, and the movable intermediate gears are rotatably supported on the intermediate shaft through the pair of bearings installed on the end faces of two sides of the movable intermediate gears; a sliding sleeve is arranged on the intermediate shaft, a key groove of the sliding sleeve is matched with a key on the intermediate shaft, the sliding sleeve is positioned between the pair of movable intermediate gears, and inner teeth matched with outer teeth adjacent to the pair of intermediate gears are arranged on the inner side of the sliding sleeve; the lower box body is provided with a shifting fork structure, the shifting fork structure is connected with the sliding sleeve, and when the shifting fork structure shifts the sliding sleeve to slide along the key, the sliding sleeve is meshed with at most one movable intermediate gear.

Further, the movable intermediate gear comprises a large gear and a small gear, and the small gear is located on the end face facing the sliding sleeve.

Further, the pinions of the pair of movable intermediate gears are identical.

Furthermore, the bearings at the opposite end surfaces of the pair of movable intermediate gears are axially limited by the keys, and the bearings at the end surfaces far away from the keys are axially limited by the end surfaces of the fixed intermediate gears and the positioning rings respectively.

Furthermore, the shifting fork structure comprises a shifting fork shaft, a handle and a pair of shifting fork arms, wherein two ends of the shifting fork shaft are respectively supported on the side wall of the box body and the rib wall inside the box body through bearings, the shifting fork shaft is horizontally arranged, is perpendicular to the middle shaft and is positioned below the middle shaft, the pair of shifting fork arms are fixed on the shifting fork shaft, and the free ends of the shifting fork arms are matched with the sliding sleeve from two sides of the sliding sleeve; the handle is positioned on the outer side of the box body and is fixedly arranged at the extending end of the shifting fork shaft.

Furthermore, the free ends of the shifting fork arms are respectively provided with a horizontal small shifting lever, a small bearing is arranged on the small shifting lever, a circle of shifting fork groove coaxial with the sliding sleeve is processed on the outer side face of the sliding sleeve, the small shifting lever is inserted into the shifting fork groove, and the outer wall of the small bearing is matched with the shifting fork groove.

Furthermore, the spring pin is installed to the free end of handle, the outer wall of spring pin perpendicular to box is equipped with three location pinhole on the box outer wall, three location pinhole correspond the sliding sleeve break away from the three position that slides intermediate gear and mesh respectively with two activity intermediate gear, the spring pin with the cooperation of location pinhole.

Still further, the lower box top surface is equipped with the round oil groove, and right groove UNICOM input shaft, jackshaft and the bearing that the output shaft corresponds.

After taking above technical scheme, the beneficial effects of the utility model are that:

the movable intermediate gears of a pair of rotary supports are independently fixed or completely separated from the intermediate shaft through the sliding sleeves which axially slide on the intermediate shaft, so that the transmission of two transmission ratios between the intermediate shaft and the input shaft and the separation of the transmission are realized, three working states of high speed, low speed and neutral gear are realized, the speed reduction requirement of a hoisting or lifting occasion is met, the working efficiency can be effectively improved, the service life of the speed reducer is prolonged, and the energy consumption is reduced.

The shifting fork mechanism is used for realizing the switching of three working states, the positioning pin holes are used for ensuring the sliding sleeve to be adjusted in place and fixing the sliding sleeve, and the safety and the stability of the speed reducer are improved.

This technical scheme simple structure utilizes the cooperation of three axles and gear can realize the output of three kinds of states, is suitable for the use of multiple occasion.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a main sectional view of the present invention.

Fig. 3 is a right side view of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:

as shown in the figure, the speed-regulating speed reducer comprises an upper box body 1, a lower box body 2, an input shaft 3, a pair of input gears 4, an intermediate shaft 5, a fixed intermediate gear 6, a pair of movable intermediate gears 7, a sliding sleeve 8, a shifting fork structure 9, an output shaft 10 and an output gear 11. The two ends of the input shaft 3, the intermediate shaft 5 and the output shaft 10 are rotatably supported between the upper box body 1 and the lower box body 2 through bearing seats, a circle of oil groove 12 is machined in the top of the lower box body 2, and the oil groove 12 is communicated with all gear holes in the box body, so that gears can be lubricated conveniently. The top of the upper box body 1 is provided with a ventilating cap 13.

The pair of input gears 4 are fixedly installed on the input shaft 3, or the input shaft 3 is a gear shaft, and two input gears are directly machined. The intermediate shaft 5 is also a gear shaft, and is provided with a fixed intermediate gear 6, and the fixed intermediate gear 6 is in meshed transmission with an output gear 11 on an output shaft 10. The intermediate shaft 5 is provided with a pair of movable intermediate gears 7, the movable intermediate gears 7 are duplicate gears and comprise two coaxial gears with one larger gear and one smaller gear, two end faces of the movable gears are respectively provided with bearings 14 through bearing holes, each movable intermediate gear is rotatably supported on the intermediate shaft 5 through the pair of bearings 14, the pinions 71 of the pair of movable intermediate gears 7 are completely identical and are arranged oppositely, and the gear numbers 72 of the pair of movable intermediate gears 7 are different and are correspondingly meshed with the pair of input gears 4 on the input shaft 3. When the input shaft 3 is input, the input gear 4 drives a pair of movable intermediate gears 7 to rotate freely on the intermediate shaft 5.

To achieve rotation of the intermediate shaft 5, a sliding sleeve 8 is mounted on the intermediate shaft 5. The sliding sleeve 8 is positioned between the pair of movable intermediate gears 7, and the sliding sleeve 8 is matched with the intermediate shaft 5 through splines or keys 15 and key grooves, so that the sliding sleeve can axially slide on the intermediate shaft 5 and can drive the intermediate shaft 5 to rotate. The bearings at the opposite end surfaces of the pair of movable intermediate gears 7 are limited by keys 15 corresponding to the sliding sleeves 8, and the bearings at the positions far away from the end surfaces are respectively limited by the end surfaces of the fixed intermediate gears 6 and the positioning rings in the axial direction, so that the movable intermediate gears 7 cannot move on the intermediate shaft.

The two ends of the sliding sleeve 8 are provided with inner gear rings meshed with a pair of pinions 71, when the sliding sleeve 8 slides and is meshed with one of the pinions 71 through the inner gear rings, the corresponding movable intermediate gear 7 is connected with the intermediate shaft 5 through the sliding sleeve 8, and the intermediate shaft 5 is driven by the gear to rotate, so that the output shaft 10 is driven by the intermediate shaft 5 to output. The sliding sleeve 8 is respectively meshed with the pair of movable intermediate gears 7 in the sliding process and is not meshed with the two movable intermediate gears simultaneously. The three states correspond to the high-speed output, the low-speed output and the non-output of the speed reducer.

In order to adjust the position of the sliding sleeve conveniently, a shifting fork structure 9 is adopted in the technical scheme.

The fork structure 9 is composed of a fork shaft 91, a handle 92, a pair of fork arms 93, a small shift lever 94 and a spring pin 95. The both ends of declutch shift shaft 91 are supported in the inside rib wall of lateral wall of lower box 2 and lower box by bearing rotation respectively, and declutch shift shaft 91 level sets up, perpendicular to jackshaft 5 and lie in the below of jackshaft 5, and declutch shift shaft 91 stretches out one end fixed mounting handle 92 of box. A pair of shifting fork arms 93 is fixedly arranged on the shifting fork shaft 91, the free ends of the shifting fork arms 93 are positioned on two radial sides of the sliding sleeve 8 and are respectively provided with a small shifting lever 94, a circle of shifting fork groove 81 coaxial with the sliding sleeve is processed on the outer side surface of the sliding sleeve 8, the small shifting lever 94 is inserted into the shifting fork groove 81, and in order to reduce friction force, a small bearing is arranged on the small shifting lever 94 and is matched with the inner wall of the shifting fork groove by the small bearing. When the handle 92 is rotated, the fork shaft 91 drives the fork arm 93 to rotate, and the fork arm 93 shifts the sliding sleeve 8 through the small shift lever 94 to slide.

In order to ensure the accuracy of the adjusting position, three positioning pin holes 16 are arranged on the outer wall of the upper box body 1, the three positioning pin holes 16 correspond to three positions where the sliding sleeve 8 is separated from the sliding intermediate gear 7 and respectively meshed with the two movable intermediate gears 7, a spring pin 95 is arranged at the free end of the handle 92, the spring pin 95 is perpendicular to the outer wall of the box body, and after the adjusting position is reached, the spring pin 95 is inserted into the positioning pin holes 16 to fix the sliding sleeve, so that the shifting is prevented, and the safety and the stability are improved.

Claims

1. A speed-regulating speed reducer comprises a box body, an input shaft, an input gear, an intermediate shaft, an intermediate gear, an output shaft and an output gear, wherein the box body is divided into an upper box body and a lower box body, two ends of the input shaft, the intermediate shaft and the output shaft are respectively rotatably supported between the upper box body and the lower box body through bearing seats, the input gear is fixedly arranged on the input shaft, the output gear is fixedly arranged on the output shaft, the intermediate gear is arranged on the intermediate shaft, and the intermediate gear is correspondingly engaged with the input gear and the output gear; a sliding sleeve is arranged on the intermediate shaft, a key groove of the sliding sleeve is matched with a key on the intermediate shaft, the sliding sleeve is positioned between the pair of movable intermediate gears, and inner teeth matched with outer teeth adjacent to the pair of intermediate gears are arranged on the inner side of the sliding sleeve; the lower box body is provided with a shifting fork structure, the shifting fork structure is connected with the sliding sleeve, and when the shifting fork structure shifts the sliding sleeve to slide along the key, the sliding sleeve is meshed with one movable intermediate gear at most.

2. A speed reducer according to claim 1, wherein the movable intermediate gear comprises a large gear and a small gear, and the small gear is located on an end face facing the sliding sleeve.

3. A speed reducer according to claim 2 in which the pinions of a pair of said movable idler gears are identical.

4. A speed reducer according to claim 2 wherein the bearings on opposite faces of a pair of said movable idler gears are axially retained by said keys, and the bearings on faces remote from said keys are axially retained by the faces of the fixed idler gears and retaining rings, respectively.

5. The speed-regulating reducer according to claim 1, wherein the fork structure comprises a fork shaft, a handle and a pair of fork arms, the two ends of the fork shaft are respectively supported by the side wall of the box body and the rib wall inside the box body through bearings, the fork shaft is horizontally arranged, is perpendicular to the middle shaft and is positioned below the middle shaft, the pair of fork arms are fixed on the fork shaft, and the free ends of the fork arms are matched with the sliding sleeve from the two sides of the sliding sleeve; the handle is positioned at the outer side of the box body and is fixedly arranged at the extending end of the shifting fork shaft.

6. The speed-regulating reducer according to claim 5, wherein the free ends of the shift fork arms are respectively provided with a horizontal small shift lever, the small shift lever is provided with a small bearing, a circle of shift fork groove coaxial with the sliding sleeve is processed on the outer side surface of the sliding sleeve, the small shift lever is inserted into the shift fork groove, and the outer wall of the small bearing is matched with the shift fork groove.

7. A speed-regulating reducer according to claim 6 in which the free end of the handle is fitted with a spring pin perpendicular to the outer wall of the casing, the outer wall of the casing being provided with three locating pin holes corresponding to three positions where the sliding sleeve is disengaged from the sliding intermediate gear and respectively engaged with the two movable intermediate gears, the spring pin being engaged with the locating pin holes.

8. The speed reducer according to claim 6, wherein the top surface of the lower box is provided with a ring of oil grooves, and the right groove is communicated with the input shaft, the intermediate shaft and the bearing corresponding to the output shaft.