CN210196362U

CN210196362U - Speed reducer with anti-load function

Info

Publication number: CN210196362U
Application number: CN201920620420.8U
Authority: CN
Inventors: Yunliang Lei; 雷运良
Original assignee: Hebei Kejun Mining Equipment Co Ltd
Current assignee: Hebei Kejun Mining Equipment Co Ltd
Priority date: 2019-05-01
Filing date: 2019-05-01
Publication date: 2020-03-27
Anticipated expiration: 2029-05-01

Abstract

The utility model relates to a speed reducer technical field especially relates to a speed reducer with prevent load function. The motor speed reducer is characterized by comprising a torque limiting input device, wherein power transmission is carried out under the action of friction force between two friction plates, when the torque reaches a certain torque and the motor reaches the maximum load, the load of the speed reducer reaches the maximum, relative sliding starts to occur between the friction plates, but the motor still normally rotates, so that the motor can be prevented from being burnt, and the problems that the motor is easily burnt when the traditional speed reducer does not have an overload prevention device and runs in an overload state, the abrasion degree of a gear is increased when the traditional speed reducer runs in a high-load state, and the service life is shortened are solved; by increasing or reducing the number of the gaskets, the compression degree of the spring in the initial state can be controlled, the pressure between the two friction plates is controlled, and the function of adjusting the maximum load torque of the speed reducer is realized.

Description

Speed reducer with anti-load function

Technical Field

The utility model relates to a speed reducer technical field especially relates to a speed reducer with prevent load function.

Background

The reducer is an independent part consisting of gear transmission, worm transmission and gear-worm transmission which are enclosed in a rigid shell, and is commonly used as a speed reduction transmission device between a prime mover and a working machine; but the general speed reducer has no overload prevention device; when the driving part of the output end connecting end has the phenomenon of clamping plate or load, the motor load runs or directly stops rotating, and the motor is easily burnt; high load operation and increased the degree of wear between the gear, life greatly shortens.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to the technical insufficiency, a speed reducer with anti-load function is provided, the design of torque limiting input device is adopted, power transmission is carried out under the action of friction force between two friction plates, when the torque reaches a certain torque, and when the motor reaches the maximum load, the load of the speed reducer reaches the maximum, relative sliding is started to occur between the friction plates, but the motor still normally rotates, thereby preventing burning loss of the motor, solving the problems that the traditional speed reducer is not provided with an anti-overload device, the motor is easily burnt down when in overload operation, the abrasion degree of a gear is increased when in high-load operation, and the service life is reduced; by increasing or reducing the number of the gaskets, the compression degree of the spring in the initial state can be controlled, the pressure between the two friction plates is controlled, and the function of adjusting the maximum load torque of the speed reducer is realized.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the device comprises a box shell, a deep groove ball bearing and a torque limiting input device; a main shaft, a transmission shaft and an output shaft are sequentially arranged in the box shell from the middle to the right; gears are connected with the middle parts of the main shaft, the transmission shaft and the output shaft in a key way; two adjacent gears are in meshing transmission; the box shell is provided with mounting grooves at two ends of the main shaft; two ends of the main shaft are arranged in the mounting groove through deep groove ball bearings; sleeves are arranged on the inner sides of the two deep groove ball bearings; a high-speed end cover is arranged on the left side of the box shell at the position of the left deep groove ball bearing; the torque limiting input device is installed at the right side installation groove.

Further optimizing the technical scheme, the middle part of the right side mounting groove is provided with a boss; and the right deep groove ball bearing is arranged at the left position of the boss.

Further optimizing the technical scheme, the torque limiting input device comprises an input shaft, a thrust bearing, a spring, a gasket and a driven disc; the middle part of the right end of the main shaft is provided with a spline groove; the plurality of shims mounts the spline groove inner bottom end; a spline shaft is arranged in the middle of the left side of the driven disc; the spline shaft is connected inside the spline groove in a sliding mode.

Further optimize this technical scheme, integral key shaft left end and right-hand member gasket top pass through the spring both ends and connect.

Further optimizing the technical scheme, the left end of the input shaft is provided with a driving disc; the right side of the driving disc is provided with a partition table; the thrust bearing is arranged at the position of the partition table; the middle part of the input shaft is provided with an auxiliary bearing at the right side of the partition table; and an input end cover is arranged on the right side of the box shell outside the auxiliary bearing.

Further optimize this technical scheme, auxiliary bearing and thrust bearing between install the spacer sleeve.

Further optimizing the technical scheme, grooves are formed in the right side of the driven disc and the left side of the driving disc; the friction plates are arranged in the grooves.

Compared with the prior art, the utility model has the advantages of it is following: 1. the design of the torque limiting input device is used for transmitting power under the action of friction force between two friction plates, when the torque limiting input device reaches a certain torque and the motor reaches the maximum load, the load of the speed reducer reaches the maximum, the friction plates begin to slide relative to each other, but the motor still normally rotates, so that the motor can be prevented from being burnt, and the problem that the motor is easily burnt when the traditional speed reducer does not have an overload prevention device and runs in an overload state is solved; 2. the speed reducer works in a certain torque, so that the problems that the abrasion degree of a gear is increased and the service life is reduced due to high-load operation can be solved; 3. by increasing or reducing the number of the gaskets, the compression degree of the spring in the initial state can be controlled, the pressure between the two friction plates is controlled, and the function of adjusting the maximum load torque of the speed reducer is realized.

Drawings

Fig. 1 is a schematic view of an internal overall installation structure of a speed reducer with a load-proof function.

Fig. 2 is a schematic view of a main shaft portion mounting structure of a speed reducer with a load-proof function.

Fig. 3 is a partial exploded view of a main shaft portion mounting structure of a speed reducer having a load-proof function.

Fig. 4 is a partial sectional view showing a structure of a connecting and mounting portion of a main shaft and a torque-limiting input device of a reduction gear having a load-preventing function.

Fig. 5 is an exploded view of a structure of a main shaft and a torque-limiting input device connecting and mounting portion of a reduction gear having a load-preventing function.

In the figure: 1. a cabinet housing; 101. a main shaft; 102. a drive shaft; 103. an output shaft; 104. a gear; 105. mounting grooves; 106. a boss; 107. a spline groove; 2. a deep groove ball bearing; 3. a torque limiting input device; 301. an input shaft; 302. a thrust bearing; 303. a spring; 304. a gasket; 305. a driven plate; 306. a spline shaft; 307. a driving disk; 308. separating the platform; 309. an auxiliary bearing; 310. an input end cap; 311. a spacer sleeve; 312. a groove; 313. a friction plate; 4. a sleeve; 5. a high speed end cap.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The first embodiment is as follows: as shown in fig. 1 to 5, a speed reducer with an anti-load function is characterized in that: the device comprises a box shell 1, a deep groove ball bearing 2 and a torque limiting input device 3; a main shaft 101, a transmission shaft 102 and an output shaft 103 are sequentially arranged in the box shell 1 from the middle to the right; the middle parts of the main shaft 101, the transmission shaft 102 and the output shaft 103 are all in key connection with a gear 104; the two adjacent gears 104 are in meshing transmission; the box shell 1 is provided with mounting grooves 105 at two ends of the main shaft 101; two ends of the main shaft 101 are arranged in the mounting groove 105 through deep groove ball bearings 2; the inner sides of the two deep groove ball bearings 2 are both provided with sleeves 4; a high-speed end cover 5 is arranged on the left side of the box shell 1 at the position of the left deep groove ball bearing 2; the torque limiting input device 3 is arranged at the position of the right mounting groove 105; a boss 106 is arranged in the middle of the right mounting groove 105; the right deep groove ball bearing 2 is arranged at the left position of the boss 106; the torque-limiting input device 3 includes an input shaft 301, a thrust bearing 302, a spring 303, a spacer 304, and a driven plate 305; the middle part of the right end of the main shaft 101 is provided with a spline groove 107; the plurality of spacers 304 are mounted at the inner bottom end of the spline groove 107; a spline shaft 306 is arranged in the middle of the left side of the driven disc 305; spline shaft 306 is slidably connected inside spline groove 107; the tops of the left end and the right end of the spline shaft 306 are connected through the two ends of the spring 303; a driving disc 307 is arranged at the left end of the input shaft 301; the right side of the driving disk 307 is provided with a partition table 308; the thrust bearing 302 is arranged at the position of the partition table 308; the middle part of the input shaft 301 is provided with an auxiliary bearing 309 at the right side of the partition table 308; an input end cover 310 is arranged on the right side of the box shell 1 outside the auxiliary bearing 309; a spacer 311 is arranged between the auxiliary bearing 309 and the thrust bearing 302; grooves 312 are formed in the right side of the driven disc 305 and the left side of the driving disc 307; friction plates 313 are mounted inside the grooves 312.

In use, in the first step, as shown in fig. 1 to 5, when the motor rotates, the input shaft 301 is driven by the coupler to rotate together, so that the right friction plate 313 is driven by the input shaft 301 and the driving disk 307 to rotate together, and because the gasket 304 and the spring 303 are installed inside the right end of the main shaft 101, a horizontal force to the right is applied to the spline shaft 306 under the action of the spring 303, so that the left friction plate 313 is pushed by the driven disk 305 to move to the right under the action of the force, and the two friction plates 313 are pressed tightly under the action of the elastic force of the spring 303; because the two friction plates 313 are in a pressing state, a certain friction force f exists between the two friction plates 313₁Therefore, when the right friction plate 313 rotates, the friction force drives the left friction plate 313 to rotate together, so that the spindle 101 is driven to rotate together through the action of the spline shaft 306 and the spline groove 107, and because the spindle 101, the transmission shaft 102 and the output shaft 103 are in meshing transmission through the gear 104, the spindle 101 rotates and is decelerated through the gear 104, and finally the output shaft 103 outputs at a lower speed; the output shaft 103 end is connected with an external machine.

Step two, as shown in fig. 1 to 5, when the external machine encounters a fault or a trip, the torque of the output shaft 103The instantaneous increase, the load of the whole speed reducer and the motor is rapidly increased, and the load force of the main shaft 101 is F; when the main shaft 101 is loaded with force F>f₁When the two friction plates 313 start to rotate relatively, the state is the maximum output torque of the speed reducer, although the output shaft 103 is static, when the input shaft 301 still rotates, the motor can be prevented from being locked and burnt; therefore, the torque limiting input device 3 is designed to transmit power under the action of friction force between the two friction plates 313, when the torque reaches a certain torque and the motor reaches the maximum load, the load of the speed reducer reaches the maximum, the friction plates 313 begin to slide relative to each other, but the motor still normally rotates, so that the motor can be prevented from being burnt, and the problem that the motor is easily burnt when the traditional speed reducer does not have an overload prevention device and runs in an overload state is solved.

Step three, as shown in fig. 1 to 5, when the maximum load of the speed reducer is adjusted, the motor and the input end cover 310 are dismounted in a stop state, then the auxiliary bearing 309, the spacer sleeve 311, the thrust bearing 302 and the input shaft 301 are sequentially taken out, then the spline shaft 306 and the spring 303 are taken out from the spline groove 107, if the maximum load of the speed reducer is to be increased, the gasket 304 is added into the spline groove 107, after the gasket 304 is added, the spring 303 is similarly placed into the spline groove 107, then the spline shaft 306 is inserted, finally the input shaft 301, the thrust bearing 302, the spacer sleeve 311 and the auxiliary bearing 309 are sequentially placed into the mounting groove 105, and finally the input end cover 310 is tightly pressed into the mounting groove 105; with the addition of the spacer 304, the initial compression of the spring 303 increases, and the spring 303 increases in force, thereby increasing the pressure and friction force f between the friction plates 313₁The torque is increased, the maximum transmission force of the torque is increased, the load force F of the main shaft 101 is increased, and the maximum load of the whole speed reducer is increased; similarly, if the number of the gaskets 304 is reduced, the maximum load of the speed reducer is reduced; therefore, by increasing or decreasing the number of the gaskets 304, the compression degree of the initial state spring 303 can be controlled, and the pressure between the two friction plates 313 is controlled, so that the function of adjusting the maximum load torque of the speed reducer is realized.

The utility model discloses a control mode comes automatic control through the controller, and the control circuit of controller can realize through the simple programming of technical staff in this field, belongs to the common general knowledge in this field, and the utility model discloses mainly be used for protecting mechanical device, so the utility model discloses no longer explain control mode and circuit connection in detail.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The utility model provides a speed reducer with prevent load function which characterized in that: comprises a box shell (1), a deep groove ball bearing (2) and a torque limiting input device (3); a main shaft (101), a transmission shaft (102) and an output shaft (103) are sequentially arranged in the box shell (1) from the middle to the right; gears (104) are connected with the middle parts of the main shaft (101), the transmission shaft (102) and the output shaft (103) in a key mode; two adjacent gears (104) are in meshing transmission; the box shell (1) is provided with mounting grooves (105) at two ends of the main shaft (101); two ends of the main shaft (101) are arranged in the mounting groove (105) through deep groove ball bearings (2); sleeves (4) are respectively arranged at the inner sides of the two deep groove ball bearings (2); a high-speed end cover (5) is arranged on the left side of the box shell (1) at the position of the left deep groove ball bearing (2); the torque limiting input device (3) is arranged at the position of the right mounting groove (105).

2. A speed reducer with an anti-load function according to claim 1, characterized in that: a boss (106) is arranged in the middle of the mounting groove (105) on the right side; the right deep groove ball bearing (2) is arranged at the left position of the boss (106).

3. A speed reducer with an anti-load function according to claim 1, characterized in that: the torque limiting input device (3) comprises an input shaft (301), a thrust bearing (302), a spring (303), a gasket (304) and a driven disc (305); the middle part of the right end of the main shaft (101) is provided with a spline groove (107); the plurality of spacers (304) are mounted at the inner bottom end of the spline groove (107); a spline shaft (306) is arranged in the middle of the left side of the driven disc (305); the spline shaft (306) is slidably connected inside the spline groove (107).

4. A reduction gear unit having a load-preventing function according to claim 3, wherein: the tops of the left end and the right end of the spline shaft (306) are connected through the two ends of the spring (303).

5. A reduction gear unit having a load-preventing function according to claim 3, wherein: a driving disc (307) is arranged at the left end of the input shaft (301); the right side of the driving disc (307) is provided with a partition table (308); the thrust bearing (302) is arranged at the position of the partition table (308); an auxiliary bearing (309) is arranged in the middle of the input shaft (301) on the right side of the partition table (308); an input end cover (310) is arranged on the right side of the box shell (1) and outside the auxiliary bearing (309).

6. A reduction gear unit having a load-proof function according to claim 5, wherein: and a spacer bush (311) is arranged between the auxiliary bearing (309) and the thrust bearing (302).

7. A reduction gear unit having a load-proof function according to claim 5, wherein: grooves (312) are formed in the right side of the driven disc (305) and the left side of the driving disc (307); and friction plates (313) are arranged in the grooves (312).