CN110242723B - Torque-limiting speed reducer - Google Patents
Torque-limiting speed reducer Download PDFInfo
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- CN110242723B CN110242723B CN201910645009.0A CN201910645009A CN110242723B CN 110242723 B CN110242723 B CN 110242723B CN 201910645009 A CN201910645009 A CN 201910645009A CN 110242723 B CN110242723 B CN 110242723B
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims abstract description 58
- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 238000007667 floating Methods 0.000 claims description 31
- 210000004907 gland Anatomy 0.000 claims description 30
- 230000008878 coupling Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 13
- 238000005859 coupling reaction Methods 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a torque-limiting speed reducer, which comprises: the box, drive assembly and output subassembly. The output assembly includes: the device comprises a connecting disc, a sun gear, an inner gear ring, a planet carrier, a spline housing and a friction torque limiting 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 spline housing is sleeved in the planet carrier, the friction torque limiting mechanism is sleeved on the spline housing, and the inner side surface and the outer side surface are respectively propped against the outer wall of the spline housing and the inner wall of the planet carrier, so that friction force transmission torque is provided to enable the spline housing to rotate along with the planet carrier; the friction force between the friction torque limiting mechanism and the spline housing and the planet carrier is adjustable. The torque limiting speed reducer can realize the slip torque limiting function when the faults such as blocking and the like occur, and improve the reliability of the whole machine. The use requirements of different scenes can be met. After the fault is removed, the production can be quickly put into operation without manual recovery, and the economic benefit is improved.
Description
Technical Field
The invention relates to the technical field of coal mine transportation, in particular to a moment-limiting speed reducer.
Background
The scraper conveyor is the main equipment of the fully-mechanized coal mining face, and pulls the scraper chain through the chain wheel assemblies positioned at the machine head and the machine tail to convey coal and materials in the groove. At present, the scraper conveyor is continuously developed in the high-power and long-distance direction, in the operation process of the scraper conveyor, the chain transmission polygonal effect and the coal blocks are successively dropped on the circular chain, so that the circular chain generates dynamic load or is blocked, when the output end is blocked, the motor is usually burnt out by the traditional speed reducer, or the tooth breakage of the speed reducer is directly caused, the production of a working surface is stopped, and the economic loss of a coal mine is further caused.
In the prior art, the torque limiter is generally arranged on the input shaft to perform torque limiting protection, so that the protection effect is poor, and the speed reducer and the chain cannot be effectively protected.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a torque-limiting speed reducer. The specific technical scheme is as follows:
a torque-limiting type speed reducer comprising: the box body, the transmission assembly and the output assembly; the output assembly includes: the device comprises a connecting disc, a sun gear, an inner gear ring, a planet carrier, a spline housing 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 gear to drive the sun gear to rotate; the sun gear, the planet carrier and the annular gear form a planetary gear train, the annular gear is fixed in the box body, and the planet carrier is driven to rotate when the sun gear rotates; the spline housing is sleeved in the planet carrier, the outer wall of the spline housing is opposite to the inner wall of the planet carrier at intervals, the friction torque limiting mechanism is sleeved on the spline housing, and the inner side surface and the outer side surface are respectively propped against the outer wall of the spline housing and the inner wall of the planet carrier, so that friction force transmission torque is provided to enable the spline housing to rotate along with the planet carrier; the friction force between the friction torque limiting mechanism and the spline housing and the planet carrier is adjustable.
In one possible design, the friction torque limiting mechanism includes a wear sleeve sleeved on the spline sleeve and an expansion member surrounding the wear sleeve for providing a radial force to generate friction.
In one possible design, the expansion member is an expansion shell.
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 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, with a bearing provided between the planet carrier and the coupling disc.
In one possible design, the torque limiting speed reducer further comprises a gland, the gland is of an annular structure, the inner wall 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 enclose a containing cavity, and the friction torque limiting mechanism is located in the containing cavity.
In one possible design, the torque limiting speed reducer further comprises a first floating seal seat and a second floating seal seat, wherein 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 disc is eccentrically connected with the box, inclined reinforcing beams are arranged on the side walls of the coupling disc, and the end parts of the reinforcing beams are connected with the outer wall of the box.
The technical scheme of the invention has the main advantages that:
according to the torque limiting speed reducer, the spline housing and the planet carrier are linked through the friction force provided by the friction torque limiting mechanism, so that torque transmission under a normal working state can be ensured, a slip torque limiting function can be realized when faults such as blocking occur, a motor, a transmission device or production equipment are protected, and the reliability of the whole machine is improved. Through adjusting the frictional force of friction limit moment mechanism, can satisfy the user demand of different scenes, application scope is wider. Because the friction torque limiting mechanism is not easy to damage in the slipping process, the production can be quickly put into operation without manual recovery after the fault is eliminated, and the economic benefit is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and without limitation to the invention. In the drawings:
FIG. 1 is a schematic diagram of the overall structure of a torque-limiting speed reducer according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an output assembly of a torque-limiting type speed reducer according to an embodiment of the present invention;
FIG. 3 is a schematic 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 decelerator provided in one embodiment of the present invention;
fig. 5 is a front view of a gland in a torque limiter type speed reducer according to an embodiment of the present invention.
Reference numerals illustrate:
the device comprises an I-transmission assembly, an II-output assembly, a 1-box body, a 2-connecting disc, a 3-sun wheel, a 4-annular gear, a 5-planet carrier, a 6-spline housing, a 7-friction torque limiting mechanism, a 71-wear-resistant housing, a 72-expansion piece, an 8-first transmission shaft, a 9-second transmission shaft, a 10-third transmission shaft, an 11-bearing, a 12-gland, a 13-first floating seal seat, a 14-second floating seal seat and a 15-reinforcing beam.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following describes in detail the technical scheme provided by the embodiment of the invention with reference to the accompanying drawings.
The embodiment of the invention provides a moment-limiting speed reducer, which is shown in the accompanying drawings as shown in the figure 1 and the figure 2, and comprises the following components: the box 1, drive assembly I and output subassembly II. The output assembly II comprises: the connecting disc 2, the sun gear 3, the annular gear 4, the planet carrier 5, the spline housing 6 and the friction torque limiting mechanism 7. The connecting disc 2 is connected with the box 1, the transmission component I is positioned in the box 1, one end of the transmission component I is connected with the output end of the motor, and the other end of the transmission component 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 annular gear 4 form a planetary gear train, the annular gear 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 are respectively propped against the outer wall of the spline housing 6 and the inner wall of the planet carrier 5, so that friction force transmission torque is provided to enable the spline housing 6 to rotate along with the planet carrier 5. The friction force between the friction torque limiting mechanism 7, the spline housing 6 and the planet carrier 5 is adjustable.
The working principle of the torque-limiting speed reducer provided by the embodiment of the invention is described below:
when the planetary gear train is used, the transmission assembly I is connected with the output shaft of the motor, the output torque of the motor drives the sun gear 3 to rotate through the transmission assembly I, the sun gear 3, the planet carrier 5 and the inner gear ring 4 form the planetary gear train, the inner gear ring 4 is fixed, and when the sun gear 3 rotates, the planet carrier 5 is driven to rotate. 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 a slip torque. When the torque is smaller than the slip torque, the spline housing 6 rotates along with the planet carrier 5, and torque is output 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, and when the torque is larger than or equal to the slip torque, the spline housing 6 and the planet carrier 5 relatively slip, and the spline housing 6 stops rotating. Through setting the moment of skidding to slightly be greater than the moment of torsion under the normal operating condition (for example, can be 3 times under the normal operating condition), can guarantee the moment of torsion transmission under the normal operating condition, can take place to skid when the phenomenon such as dead in the emergence card again, avoid producing great moment and lead to motor and/or equipment to damage, improve production security performance. The friction torque limiting mechanism 7 can not be damaged in the skidding process, and the device can be normally put into use without manual recovery after fault elimination. Further, 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 moments, the torque limiting use requirements of different scenes can be met, and the application range is wider.
Therefore, according to the torque limiting speed reducer provided by the embodiment of the invention, the spline housing 6 and the planet carrier 5 are linked through the friction force provided by the friction torque limiting mechanism 7, so that torque transmission in a normal working state can be ensured, a slip torque limiting function can be realized when faults such as blocking occur, a motor, a transmission device or production equipment are protected, and the reliability of the whole machine is improved. Through adjusting the frictional force of friction limit mechanism 7, can satisfy the user demand of different scenes, application scope is wider. Because the friction torque limiting mechanism 7 is not easy to damage in the skidding process, the production can be quickly put into operation without manual recovery after the fault is eliminated, and the economic benefit is improved.
The reduction gear ratio of the reducer can be set by the gear ratio in the transmission component I and the gear ratio in the planetary gear train, which are known technical means by those skilled in the art, and are not described in detail in the embodiment of the present invention.
Optionally, in the torque limiting reducer provided by the embodiment of the invention, the friction torque limiting mechanism 7 comprises a wear-resistant sleeve 71 and an expansion piece 72, the wear-resistant sleeve 71 is sleeved on the spline sleeve 6, and the expansion piece 72 is surrounded outside the wear-resistant sleeve 71 and is used for providing radial force to generate friction force. By controlling the radial force by the expansion degree of the expansion member 72, the frictional force between the friction torque limiting mechanism 7 and the spline housing 6 and the carrier 5 can be adjusted. By providing the wear-resistant sleeve 71, wear of the expansion member 72 is avoided, the service life is prolonged, and the use reliability is improved.
The structure of the expansion member 72 is exemplified as follows:
as an example, the expansion member 72 may be an expansion sleeve, and the slip moment is set by adjusting the magnitude of the expansion force with 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 expansion sleeves with different volumes between the wear-resistant sleeve 71 and the planet carrier 5, so that different expansion forces can be achieved; or, the expansion sleeve can be fixed on the end face of the planet carrier 5 through bolts arranged along the axial direction, and different expansion forces are obtained by compressing the expansion sleeve to different degrees through rotating the bolts.
Alternatively, the expansion shell may comprise two outer rings, one inner ring and a tensioning bolt. The two outer rings are arranged on two sides of the inner ring, the inner ring and the outer ring are contacted through conical contact surfaces, and the two outer rings are connected through tensioning bolts. The distance between the two outer rings is shortened by tightening the bolts, so that the axial dimension of the expansion sleeve is reduced, the radial dimension is increased, and the purpose of tensioning is achieved.
As another example, the expansion member 72 may be a high pressure oil bladder that is filled with hydraulic oil to provide a radial force. The magnitude of the radial force can be controlled by controlling the quantity of hydraulic oil filled in the high-pressure oil bag, so that the slipping moment is set.
In the embodiment of the invention, the maximum friction pair specific pressure of the friction torque limiting mechanism 7 can reach 180MPa.
Optionally, in order to avoid heat accumulation generated during slipping, the inner wall of the wear sleeve 71 is provided with a spiral oil groove, as shown in fig. 3. So set up, lubricating oil can evenly flow through each position of wear-resisting cover 71 in the spiral oil groove, ensures that the heat that friction limit moment mechanism 7 produced can in time be taken away by lubricating oil when skidding, plays cooling and guard action, prolongs wear-resisting cover 71's life.
In the embodiment of the invention, the transmission assembly I is used for transmitting the torque of the motor output shaft to the sun gear 3 and has a deceleration function, and the transmission assembly I can be in various forms as long as the purposes of torque transmission and deceleration can be achieved. 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, one end of the first transmission shaft 8 is connected to the motor output shaft, the other end is connected to 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 arranged, the first drive shaft 8 and the second drive shaft 9 are connected by means of meshed bevel gears, the direction of torque can be changed, and the reduction gear ratio can be controlled by means of the gear ratio of the bevel gears. The second transmission shaft 9 and the third transmission shaft 10 are arranged in parallel, and are linked through meshed spur gears, so that the purpose of reducing speed and 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 effect, avoids the eccentric rocking of planet carrier 5, and makes the rotation resistance between planet carrier 5 and the coupling plate 2 less.
Optionally, the torque limiting speed reducer provided by the embodiment of the invention further comprises a gland 12, the gland 12 is of an annular structure, the inner wall of the gland 12 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 enclose a containing cavity, and the friction torque limiting mechanism 7 is located in the containing cavity. So set up, on the one hand, gland 12 inner wall and spline housing 6 move the contact with sealedly, can enclose into holding the chamber with planet carrier 5 and spline housing 6, be convenient for hold intracavity add lubricating oil and play the cooling effect to friction limit moment mechanism 7, and play the guard action to friction limit moment mechanism 7, can not influence both relative rotation when planet carrier 5 and spline housing 6 take place to skid again. On the other hand, the gland 12 has a portion protruding from the carrier 5, and is partially pressed and fixed on the bearing 11, thereby fixing the bearing 11.
As shown in fig. 2 and fig. 4, the cross section of the gland 12 is of a multi-stage step 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 achieve the effects of contact, connection or blocking. 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 manner, so that the gland 12 and the planet carrier 5 are connected together. As shown in fig. 5, the plurality of bolts are uniformly distributed along the circumferential direction of the gland 12.
Optionally, the torque limiting speed reducer provided by the embodiment of the invention further comprises 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. The first floating seal seat 13 and the second floating seal seat 14 are used for sealing the end face of the connecting disc, so that the bearing 11, the gland 12 and the like are fixed and protected, the end face of the connecting disc 2 is smoothly transited, and the surface is smoother.
The first floating seal seat 13 and the gland 12 may be connected by a bolt, and the bolt passes through a through hole or a screw hole on the inner side of the first floating seal seat 13 to be inserted in a threaded manner and must be in the screw hole 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 and the coupling disc 2 can be connected through bolts, and the bolts penetrate through holes or screw holes on the outer side of the second floating seal seat 14 to be inserted into and fixed in screw holes on the end face of the coupling disc 2 in a threaded connection mode, so that the second floating seal seat 14 and the coupling disc 2 are connected together.
In the moment-limiting speed reducer provided by the embodiment of the invention, as shown in fig. 1 and 2, the connecting disc 2 is eccentrically connected with the box body 1, the axes of the connecting disc 2 and the box body 1 are far away, and in order to ensure the connection stability, the side wall of the connecting disc 2 is provided with the inclined reinforcing beam 15, and the end part of the reinforcing beam 15 is connected with the outer wall of the box body 1. As the direction shown in the drawing is the benchmark, the coupling plate 2 is located the below right side region of box 1, is provided with the stiffening beam 15 on its left side wall, and the end connection of stiffening beam 15 is on the below left side region of box 1, and box 1 exerts the effort along stiffening beam 15 direction to coupling plate 2, makes coupling plate 2 more even to the effort distribution of box 1, improves the connection effect.
It should be noted that in this document, relational terms such as "first" and "second" and the like are 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. Moreover, 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 this context, "front", "rear", "left", "right", "upper" and "lower" are referred to with respect to the placement state shown in the drawings.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting thereof; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A torque-limiting type speed reducer, characterized by comprising: the box body (1), the transmission component (I) and the output component (II);
the output assembly (II) comprises: the device comprises a connecting disc (2), a sun gear (3), an inner gear ring (4), a planet carrier (5), a spline housing (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 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 planet carrier (5) is driven to rotate when the sun gear (3) rotates;
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);
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), the inner side surface and the outer side surface are respectively propped against the outer wall of the spline housing (6) and the inner wall of the planet carrier (5), and the friction torque limiting mechanism is used for providing friction torque to enable the spline housing (6) to rotate along with the planet carrier (5), and friction force between the friction torque limiting mechanism (7) and the spline housing (6) and the planet carrier (5) is adjustable;
the friction torque limiting mechanism (7) comprises a wear-resistant sleeve (71) and an expansion piece (72), the wear-resistant sleeve (71) is sleeved on the spline sleeve (6), the expansion piece (72) is arranged outside the wear-resistant sleeve (71) in a surrounding mode and is used for providing radial force to generate friction force, and the expansion piece (72) is an expansion sleeve or a high-pressure oil bag;
the torque limiting speed reducer further comprises a gland (12), a first floating seal seat (13) and a second floating seal seat (14), wherein the gland (12) is of an annular structure, the inner wall of the gland is in dynamic seal 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) is enclosed to form a containing cavity with the planet carrier (5) and the spline housing (6), the friction torque limiting mechanism (7) is located in the containing cavity, the inner side of the first floating seal seat (13) is connected with the gland (12), the first floating seal seat (13) is connected with the second floating seal seat (14) through a floating oil seal, and the outer side of the second floating seal seat (14) is connected with the connecting disc (2) and compresses the bearing (11).
2. A torque-limiting reducer according to claim 1, characterized in that the inner wall of the wear sleeve (71) is provided with a helical oil groove.
3. Torque-limiting reducer according to claim 1, characterized in that the transmission assembly (I) comprises a first transmission shaft (8), a second transmission shaft (9) and a third transmission shaft (10), one end of the first transmission shaft (8) being connected to the motor output shaft, the other end being connected to one end of the second transmission shaft (9) by means of a meshed bevel gear, the second transmission shaft (9) and the third transmission shaft (10) being connected by means of a meshed spur gear.
4. A torque-limiting reducer according to any one of claims 1 to 3, characterized in that the coupling disc (2) is eccentrically connected to the casing (1), the side wall of the coupling disc (2) being provided with inclined reinforcing beams (15), the ends of the reinforcing beams (15) being connected to the outer wall of the casing (1).
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| CN201910645009.0A CN110242723B (en) | 2019-07-17 | 2019-07-17 | Torque-limiting speed reducer |
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| CN201910645009.0A CN110242723B (en) | 2019-07-17 | 2019-07-17 | Torque-limiting speed reducer |
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| CN110242723B true CN110242723B (en) | 2024-03-29 |
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| CN210859724U (en) * | 2019-07-17 | 2020-06-26 | 山西煤矿机械制造股份有限公司 | Torque-limiting speed reducer |
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2019
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| CN102927208A (en) * | 2012-11-20 | 2013-02-13 | 中传重型装备有限公司 | Cutting reducer for continuous miner |
| CN104747668A (en) * | 2015-04-13 | 2015-07-01 | 南京康尼精密机械有限公司 | Stepless variable transmission for differential speed regulation of planetary gears |
| CN206017465U (en) * | 2016-08-30 | 2017-03-15 | 浙江宇龙机械有限公司 | A kind of wear-resisting expansion set |
| CN206268384U (en) * | 2016-12-06 | 2017-06-20 | 六环传动（西安）科技有限公司 | A kind of robot and planetary reducer |
| CN108150611A (en) * | 2016-12-06 | 2018-06-12 | 六环传动（西安）科技有限公司 | A kind of robot and planetary reducer |
| CN210859724U (en) * | 2019-07-17 | 2020-06-26 | 山西煤矿机械制造股份有限公司 | Torque-limiting speed reducer |
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| CN110242723A (en) | 2019-09-17 |
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