CN210859724U

CN210859724U - Torque-limiting speed reducer

Info

Publication number: CN210859724U
Application number: CN201921120386.4U
Authority: CN
Inventors: 沃克·克诺尔; 樊建军; 文卫星; 谢地; 逯盛华; 武旭彦; 王冰
Original assignee: Shanxi Coal Mining Machinery Manufacturing Co ltd
Current assignee: Shanxi Coal Mining Machinery Manufacturing Co ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-06-26
Anticipated expiration: 2029-07-17

Abstract

The utility model discloses a limit for moment type reduction gear, include: the device comprises a box body, a transmission assembly and an output assembly. The output assembly includes: coupling disc, sun gear, ring gear, planet carrier, spline housing and friction limit square mechanism. One end of the transmission component is connected with the output end of the motor, and the other end of the transmission component is connected with the sun gear to drive the sun gear to rotate. The sun gear, the planet carrier and the inner gear ring form a planetary gear train, and the sun gear drives the planet carrier to rotate. The friction torque limiting mechanism is sleeved on the spline sleeve, and the inner side surface and the outer side surface of the friction torque limiting mechanism are respectively abutted against the outer wall of the spline sleeve and the inner wall of the planet carrier and used for providing friction force to transmit torque so that the spline sleeve rotates along with the planet carrier; the friction force between the friction torque limiting mechanism and the spline housing and between the friction torque limiting mechanism and the planet carrier is adjustable. The utility model discloses a limit square reduction gear can realize the limit square function of skidding when taking place trouble such as the card is stifled, improves the complete machine reliability. The use requirements of different scenes can be met. The production can be rapidly carried out without manual recovery, and the economic benefit is improved.

Description

Torque-limiting speed reducer

Technical Field

The utility model relates to a coal mine transportation technical field especially relates to a limit square reduction gear.

Background

The scraper conveyor is the main equipment of the coal mine fully-mechanized mining working face, and transports coal and materials in a groove by dragging a scraper chain through chain wheel assemblies positioned at a machine head and a machine tail. At present, a scraper conveyor continuously develops towards the direction of high power and long conveying distance, and the scraper conveyor causes dynamic load or jamming of a round-link chain due to the polygonal effect of chain transmission and the fact that coal blocks continuously fall on the round-link chain in the operation process, so that when an output end is jammed, a motor is generally burnt out by a traditional speed reducer, or the traditional speed reducer directly causes tooth breakage of the speed reducer, the stop of a working face is caused, and further economic loss of a coal mine is caused.

In the prior art, torque limiter protection is generally carried out by mounting a torque limiter on an input shaft, so that the protection effect is poor, and a speed reducer and a chain cannot be effectively protected.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem that exists among the above-mentioned prior art, the utility model provides a limit square reduction gear. The specific technical scheme is as follows:

a torque-limiting type speed reducer comprising: the device comprises a box body, a transmission assembly and an output assembly; the output assembly includes: the device comprises a coupling disc, a sun gear, an inner gear ring, a planet carrier, a spline sleeve and a friction torque limiting mechanism; the connecting disc is connected with the box body, the transmission assembly is positioned in the box body, one end of the transmission assembly is connected with the output end of the motor, and the other end of the transmission assembly is connected with the sun wheel to drive the sun wheel to rotate; the sun wheel, the planet carrier and the inner gear ring form a planetary gear train, the inner gear ring is fixed in the box body, and the sun wheel drives the planet carrier to rotate when rotating; the friction torque limiting mechanism is sleeved on the spline sleeve, the inner side surface and the outer side surface of the friction torque limiting mechanism respectively abut against the outer wall of the spline sleeve and the inner wall of the planet carrier, and is used for providing friction force to transmit torque so that the spline sleeve rotates along with the planet carrier; and the friction force between the friction torque limiting mechanism and the spline sleeve as well as between the friction torque limiting mechanism and the planet carrier is adjustable.

In one possible design, the friction torque limiting mechanism comprises a wear-resistant sleeve sleeved on the spline sleeve and an expansion piece enclosed outside the wear-resistant sleeve for providing radial force to generate friction force.

In one possible design, the expansion element is an expansion sleeve.

In one possible design, the expansion member is a high pressure oil bladder.

In one possible design, the inner wall of the wear sleeve is provided with a helical oil groove.

In one possible design, the transmission assembly includes a first transmission shaft, a second transmission shaft and a third transmission shaft, one end of the first transmission shaft is connected with the motor output shaft, the other end of the first transmission shaft is connected with one end of the second transmission shaft through a meshed bevel gear, and the second transmission shaft is connected with the third transmission shaft through a meshed spur gear.

In one possible design, the planet carrier is located within the coupling disc, and a bearing is provided between the planet carrier and the coupling disc.

In a possible design, the torque-limiting speed reducer further comprises a gland, the gland is of an annular structure, the inner wall of the gland is in dynamic sealing contact with the outer wall of the spline housing, the gland is connected with the planet carrier and compresses the bearing, the gland, the planet carrier and the spline housing define an accommodating cavity, and the friction torque-limiting mechanism is located in the accommodating cavity.

In a possible design, the torque-limiting speed reducer further comprises a first floating seal seat and a second floating seal seat, the inner side of the first floating seal seat is connected with the gland, the first floating seal seat and the second floating seal seat are connected and sealed through a floating oil seal, and the outer side of the second floating seal seat is connected with the connecting disc to compress the bearing.

In one possible design, the coupling plate is eccentrically connected to the box body, and an inclined reinforcing beam is arranged on a side wall of the coupling plate, and an end of the reinforcing beam is connected to an outer wall of the box body.

The utility model discloses technical scheme's main advantage as follows:

the utility model discloses a limit square reduction gear makes spline housing and planet carrier linkage through the frictional force that friction limit square mechanism provided, can guarantee the moment of torsion transmission under the normal operating condition, can realize the limit square function of skidding again when taking place trouble such as card stifled, plays the guard action to motor, transmission or production facility etc. improves the complete machine reliability. The friction force of the friction torque limiting mechanism is adjusted, so that the use requirements of different scenes can be met, and the application range is wide. Because the friction torque limiting mechanism is not easy to damage in the slipping process, the device can be put into production quickly without manual recovery after the fault is eliminated, and the economic benefit is improved.

Drawings

The accompanying drawings, which are set forth herein, serve to provide a further understanding of the embodiments of the present invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are illustrative of the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic view of an overall structure of a torque-limiting type speed reducer according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an output assembly in a torque-limiting type speed reducer according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a friction torque limiting mechanism in a torque limiting type speed reducer according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a gland in a torque-limiting type speed reducer according to an embodiment of the present invention;

fig. 5 is a front view of a gland in a torque-limiting type speed reducer according to an embodiment of the present invention.

Description of reference numerals:

i-transmission assembly, II-output assembly, 1-box body, 2-coupling disc, 3-sun gear, 4-inner gear ring, 5-planet carrier, 6-spline housing, 7-friction torque limiting mechanism, 71-wear-resistant housing, 710-spiral oil groove, 72-expansion piece, 8-first transmission shaft, 9-second transmission shaft, 10-third transmission shaft, 11-bearing, 12-gland, 13-first floating seal seat, 14-second floating seal seat and 15-reinforcing beam.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The technical solution provided by the embodiments of the present invention is described in detail below with reference to the accompanying drawings.

The embodiment of the utility model provides a limit square reduction gear, as shown in figure 1 and figure 2, include: the device comprises a box body 1, a transmission assembly I and an output assembly II. The output assembly II comprises: coupling disc 2, sun gear 3, ring gear 4, planet carrier 5, spline housing 6 and friction limit square mechanism 7. The connecting disc 2 is connected with the box body 1, the transmission assembly I is positioned in the box body 1, one end of the transmission assembly I is connected with the output end of the motor, and the other end of the transmission assembly I is connected with the sun gear 3 to drive the sun gear 3 to rotate. The sun gear 3, the planet carrier 5 and the inner gear ring 4 form a planetary gear train, the inner gear ring 4 is fixed in the box body 1, and the sun gear 3 drives the planet carrier 5 to rotate when rotating. The spline housing 6 is sleeved in the planet carrier 5, the outer wall of the spline housing 6 is opposite to the inner wall of the planet carrier 5 at intervals, the friction torque limiting mechanism 7 is sleeved on the spline housing 6, and the inner side surface and the outer side surface of the friction torque limiting mechanism respectively abut against the outer wall of the spline housing 6 and the inner wall of the planet carrier 5 and are used for providing friction force to transmit torque so that the spline housing 6 rotates along with the planet carrier 5. The friction force between the friction torque limiting mechanism 7 and the spline housing 6 and between the friction torque limiting mechanism and the planet carrier 5 is adjustable.

The following explains the working principle of the torque-limiting speed reducer provided by the embodiment of the invention:

when the planetary gear train is used, the transmission component I is connected with an output shaft of the motor, the output torque of the motor drives the sun gear 3 to rotate through the transmission component I, the sun gear 3, the planet carrier 5 and the inner gear ring 4 form a planetary gear train, the inner gear ring 4 is fixed, and the sun gear 3 drives the planet carrier 5 to rotate when rotating. The planet carrier 5 and the spline housing 6 are linked by the friction force of the friction torque limiting mechanism 7, and the maximum torque which can be transmitted by the friction force is the slip torque. When the torque is smaller than the slip torque, the spline housing 6 rotates along with the planet carrier 5 to output the torque outwards, and the normal working state is achieved at the moment. When the blocking phenomenon occurs, the torque between the spline housing 6 and the planet carrier 5 is increased, when the torque is larger than or equal to the slipping torque, the spline housing 6 and the planet carrier 5 slip relatively, and the spline housing 6 stops rotating. The slip moment is set to be slightly larger than the torque in the normal working state (for example, the slip moment can be 3 times of the torque in the normal working state), so that the torque transmission in the normal working state can be ensured, the slip can be caused when the phenomena of blocking and the like occur, the damage of a motor and/or equipment caused by the generation of the larger moment is avoided, and the production safety performance is improved. The friction torque limiting mechanism 7 cannot be damaged in the slipping process, and can be normally put into use without manual recovery after the fault is eliminated. Furthermore, as the friction force between the friction torque limiting mechanism 7 and the planet carrier 5 and the spline housing 6 is adjustable, different friction forces correspond to different slip torques, the torque limiting requirements of different scenes can be met, and the application range is wide.

It is visible, the embodiment of the utility model provides a limit square reduction gear makes spline housing 6 and planet carrier 5 linkage through the frictional force that friction limit square mechanism 7 provided, can guarantee the moment of torsion transmission under the normal operating condition, can realize the limit square function of skidding again when taking place trouble such as card stifled, plays the guard action to motor, transmission or production facility etc. and improves the complete machine reliability. The friction force of the friction torque limiting mechanism 7 is adjusted, so that the use requirements of different scenes can be met, and the application range is wide. Because the friction torque limiting mechanism 7 is not easy to damage in the slipping process, the device can be put into production quickly without manual recovery after the fault is eliminated, and the economic benefit is improved.

Wherein, the reduction gear ratio of reduction gear can set up through the gear ratio in the transmission assembly I and the gear ratio in the planetary gear train, and it is the well-known technological means of technical staff in the field, the embodiment of the utility model provides a no longer describe repeatedly.

Optionally, the embodiment of the utility model provides an in the limit square reduction gear, friction limit square mechanism 7 includes wear-resisting cover 71 and inflation piece 72, and wear-resisting cover 71 suit is on spline housing 6, and inflation piece 72 encloses to be established outside wear-resisting cover 71 for provide radial force and produce frictional force. So set up, control the size of radial force through the inflation degree of inflation piece 72, make the frictional force adjustable between friction limit square mechanism 7 and spline housing 6 and planet carrier 5. Through setting up wear-resisting cover 71, avoid the wearing and tearing of inflation piece 72, increase of service life improves the reliability in utilization.

As for the structure of the expansion member 72, the following is exemplified:

as an example, the expansion member 72 may be an expansion sleeve, and the magnitude of the expansion force is adjusted to set the slip moment by using the expansion force of the expansion sleeve as the radial force.

When the expansion force is adjusted, the extrusion degree of the expansion sleeve can be controlled by filling the expansion sleeves with different volumes between the wear-resistant sleeve 71 and the planet carrier 5, so that different expansion forces are achieved; or the expansion sleeve can be fixed on the end face of the planet carrier 5 through a bolt arranged along the axial direction, and different expansion forces can be obtained by compressing the expansion sleeve in different degrees through rotating the bolt.

Or the expansion sleeve can comprise two outer rings, an inner ring and a tension bolt. The two outer rings are arranged on two sides of the inner ring, the inner ring is in contact with the outer rings through tapered contact surfaces, and the two outer rings are connected through tensioning bolts. The distance between the two outer rings is shortened by screwing the bolt, so that the axial size of the expansion sleeve is reduced, the radial size is increased, and the purpose of tensioning is achieved.

As another example, the expansion member 72 may be a high pressure oil bladder that provides radial force by filling hydraulic oil in the high pressure oil bladder. The magnitude of the radial force can be controlled by controlling the amount of the hydraulic oil filled in the high-pressure oil bag, and then the slip moment is set.

In the embodiment of the utility model, the maximum friction pair specific pressure of the friction torque limiting mechanism 7 can reach 180 MPa.

Alternatively, in order to avoid heat build-up generated at the time of slipping, as shown in fig. 3, the inner wall of the wear-resistant shell 71 is provided with a spiral oil groove 710. So set up, lubricating oil can evenly flow through each position of wear-resisting cover 71 in the helical oil groove, and the heat that friction limit square mechanism 7 produced when guaranteeing to skid can in time be taken away by lubricating oil, plays cooling and guard action, prolongs wear-resisting cover 71's life.

The embodiment of the utility model provides an in, drive assembly I is used for transmitting the torque of motor output shaft to sun gear 3, and plays the deceleration effect, and drive assembly I can be multiple form, as long as can play torque transmission and speed reduction purpose. Illustratively, as shown in fig. 1, the transmission assembly I includes a first transmission shaft 8, a second transmission shaft 9 and a third transmission shaft 10, wherein one end of the first transmission shaft 8 is connected with the output shaft of the motor, the other end of the first transmission shaft is connected with one end of the second transmission shaft 9 through a meshed bevel gear, and the second transmission shaft 9 and the third transmission shaft 10 are connected through a meshed spur gear. So set up, first transmission shaft 8 and second transmission shaft 9 are connected through the bevel gear of meshing, can change the direction of torque, and through the gear ratio of bevel gear, can control the speed reduction drive ratio. The second transmission shaft 9 and the third transmission shaft 10 are arranged in parallel and linked through meshed straight gears, so that the purpose of speed reduction transmission is achieved.

The sun gear 3 drives the planet carrier 5 to rotate when rotating, in order to facilitate the rotation of the planet carrier 5, the planet carrier 5 is positioned in the connecting disc 2, and a bearing 11 is arranged between the planet carrier 5 and the connecting disc 2. So set up, bearing 11 plays spacing and fixed action, avoids planet carrier 5's off-centre to rock, and makes the rotational resistance between planet carrier 5 and the connecting plate 2 less.

Optionally, the embodiment of the utility model provides a limit square reduction gear still includes gland 12, and gland 12 is the loop configuration, and inner wall and spline housing 6's outer wall movive seal ground contact, and gland 12 is connected and hold-down bearing 11 with planet carrier 5, and gland 12 encloses with planet carrier 5 and spline housing 6 and becomes to hold the chamber, and friction limit square mechanism 7 is located and holds the intracavity. So set up, on the one hand, 12 inner walls of gland and 6 movive seal ground contacts of spline housing can enclose with planet carrier 5 and spline housing 6 and become to hold the chamber, are convenient for hold the intracavity and add lubricating oil and play the cooling effect to friction limit square mechanism 7, and play the guard action to friction limit square mechanism 7, can not influence relative rotation between them when planet carrier 5 takes place to skid with spline housing 6 again. On the other hand, the gland 12 has a portion protruding from the planet carrier 5, and a portion of the gland is pressed and fixed on the bearing 11, so as to fix the bearing 11.

As shown in fig. 2 and 4, the cross section of the gland 12 is a multi-stage stepped structure so as to be matched with the positions of the spline housing 6, the friction torque limiting mechanism 7, the planet carrier 5 and the bearing 11, and the contact, connection or blocking effects are achieved. The gland 12 and the planet carrier 5 can be connected through bolts, and the bolts pass through holes or screw holes on the gland 12 and are inserted and fixed in screw holes on the end surface of the planet carrier 5 in a threaded connection mode, so that the gland 12 and the planet carrier 5 are connected together. As shown in fig. 5, a plurality of bolts are uniformly distributed along the circumferential direction of the gland 12.

Optionally, the embodiment of the utility model provides a limit moment type reduction gear still includes that first floating seal seat 13 and second float seal seat 14, and the inboard and gland 12 of first floating seal seat 13 are connected, and first floating seal seat 13 and second float and seal through the oil blanket hookup of floating between the seat 14 and seal, and the outside and the coupling disk 2 of second floating seal seat 14 are connected, hold-down bearing 11. The end faces of the connecting discs are plugged through the first floating seal seat 13 and the second floating seal seat 14, the bearing 11, the gland 12 and the like are fixed and protected, the end faces of the connecting discs 2 are in smooth transition, and the surfaces are smooth.

The first floating seal seat 13 and the gland 12 may be connected by bolts, and the bolts are inserted through holes or screw holes inside the first floating seal seat 13 in a threaded connection manner and are bound to be in the screw holes on the gland 12, so as to connect the first floating seal seat 13 and the gland 12 together. The outer side of the second floating seal seat 14 can be connected with the coupling disk 2 through a bolt, and the bolt passes through a through hole or a screw hole on the outer side of the second floating seal seat 14 and is inserted and fixed in a screw hole on the end surface of the coupling disk 2 in a threaded connection mode, so that the second floating seal seat 14 is connected with the coupling disk 2.

The embodiment of the utility model provides an among the limit square reduction gear, as shown in figure 1 and figure 2, coupling disk 2 and 1 eccentric connections of box, axis between them is far away at a distance, for the assurance stability of connecting, is provided with the reinforcing beam 15 of slope on the lateral wall of coupling disk 2, the tip of reinforcing beam 15 and the outer wall connection of box 1. As the direction shown in the attached drawing is taken as the reference, the connecting disc 2 is positioned in the lower right area of the box body 1, the left side wall of the connecting disc is provided with the reinforcing beam 15, the end part of the reinforcing beam 15 is connected to the lower left area of the box body 1, the box body 1 applies acting force along the direction of the reinforcing beam 15 to the connecting disc 2, so that the acting force of the connecting disc 2 to the box body 1 is distributed uniformly, and the connecting effect is improved.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A torque-limiting type speed reducer, comprising: the device comprises a box body (1), a transmission assembly (I) and an output assembly (II);

the output assembly (II) comprises: the device comprises a coupling disc (2), a sun gear (3), an inner gear ring (4), a planet carrier (5), a spline sleeve (6) and a friction torque limiting mechanism (7);

the connecting disc (2) is connected with the box body (1), the transmission assembly (I) is positioned in the box body (1), one end of the transmission assembly is connected with the output end of the motor, and the other end of the transmission assembly is connected with the sun wheel (3) to drive the sun wheel (3) to rotate;

the sun gear (3), the planet carrier (5) and the inner gear ring (4) form a planetary gear train, the inner gear ring (4) is fixed in the box body (1), and the sun gear (3) drives the planet carrier (5) to rotate when rotating;

the spline sleeve (6) is sleeved in the planet carrier (5), the outer wall of the spline sleeve (6) is opposite to the inner wall of the planet carrier (5) at intervals, the friction torque limiting mechanism (7) is sleeved on the spline sleeve (6), the inner side surface and the outer side surface of the friction torque limiting mechanism respectively abut against the outer wall of the spline sleeve (6) and the inner wall of the planet carrier (5), and friction force is provided to transmit torque so that the spline sleeve (6) rotates along with the planet carrier (5);

and the friction force between the friction torque limiting mechanism (7) and the spline sleeve (6) and between the friction torque limiting mechanism and the planet carrier (5) is adjustable.

2. A torque-limiting reducer according to claim 1, in which said friction torque-limiting mechanism (7) comprises a wear-resistant sleeve (71) and an expansion member (72), said wear-resistant sleeve (71) being fitted over said spline sleeve (6), said expansion member (72) being enclosed outside said wear-resistant sleeve (71) for providing a radial force to generate the friction force.

3. Torque-limiting retarder according to claim 2, characterized in that the expansion piece (72) is an expansion sleeve.

4. Torque-limiting type of retarder according to claim 2, characterized in that the expansion piece (72) is a high pressure oil pocket.

5. Torque-limiting type reducer according to claim 2, characterized in that the inner wall of said wear sleeve (71) is provided with helical oil grooves (710).

6. A torque-limiting type reducer according to claim 1, in which said transmission assembly (I) comprises a first transmission shaft (8), a second transmission shaft (9) and a third transmission shaft (10), one end of said first transmission shaft (8) being connected to the output shaft of the motor, the other end being connected to one end of said second transmission shaft (9) by means of a meshed bevel gear, said second transmission shaft (9) and said third transmission shaft (10) being connected by means of a meshed spur gear.

7. Torque-limiting reducer according to claim 1, characterized in that said planet carrier (5) is located inside said coupling disc (2), a bearing (11) being provided between said planet carrier (5) and said coupling disc (2).

8. A torque-limiting speed reducer according to claim 7, further comprising a gland (12), wherein the gland (12) is of an annular structure, the inner wall of the gland is in dynamic sealing contact with the outer wall of the spline housing (6), the gland (12) is connected with the planet carrier (5) and compresses the bearing (11), the gland (12), the planet carrier (5) and the spline housing (6) define a containing cavity, and the friction torque-limiting mechanism (7) is located in the containing cavity.

9. A torque-limiting type speed reducer according to claim 8, further comprising a first floating seal seat (13) and a second floating seal seat (14), wherein the inner side of the first floating seal seat (13) is connected with the gland (12), the first floating seal seat (13) and the second floating seal seat (14) are connected and sealed through a floating oil seal, and the outer side of the second floating seal seat (14) is connected with the connecting disc (2) to compress the bearing (11).

10. Moment-limiting reducer according to any of claims 1 to 9, characterized in that said coupling disc (2) is eccentrically connected to said box (1), in that on the side walls of said coupling disc (2) there are provided inclined reinforcing beams (15), the ends of said reinforcing beams (15) being connected to the outer walls of said box (1).