Torsion limiter and scraper conveyer
By introducing the buffer structure of rod end joint bearings, telescopic rods, guide sleeves and damping groups into the torque limiter, the problem of difficult to accurately control the torque limiter parameters in the prior art is solved, and the safety protection effect with good stability and flexible adjustment is achieved.
Patent Information
- Application Number
- CN202422349131.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The existing torque limiter is difficult to accurately control the torque limit parameters, and the structure is vulnerable, resulting in poor reliability and short service life.
The buffer structure including rod end joint bearings, telescopic rods, outer seat bodies, guide sleeves and damping groups is adopted. The proximity switch is driven to move through torque changes, protecting the reducer and motor, and achieving accurate control and stability of torque limit parameters.
It realizes good stability and flexible adjustment of the torque limiter, ensuring safety protection during overload or abnormal operation.
Smart Images
Figure CN223133141U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a torque limiter and a scraper conveyor equipped with the torque limiter. Background Art
[0002] In various conveyors, direct-connected reduction motors are often used. In order to protect the reduction motor from damage during overload or abnormal operation, a torque limiter is required. The rated torque of the reduction motor and the torque arm of a special reducer are used to calculate the rated torque of the torque limiter, and then the damping group that matches it is calculated.
[0003] The existing torque limiters generally limit the torque of the motor through friction or the pressure of a spring. The torque limit parameters of such torque limiters are difficult to accurately control, their reliability is poor, the structure is vulnerable, and the service life is short. Content of the Utility Model
[0004] Aiming at the deficiencies in the prior art, the utility model provides a torque limiter with good stability, flexible adjustment, and accurately controllable torque limit parameters, and a scraper conveyor equipped with the torque limiter.
[0005] The utility model is realized through the following technical solutions:
[0006] The utility model provides a torque limiter, which includes a fixed seat, a torque limiter main body, and a torque arm. One end of the torque limiter main body is rotatably connected to the fixed seat, and the other end is rotatably connected to the main body of the reducer through the torque arm. The torque limiter main body includes a rod end spherical bearing, a telescopic rod, an outer seat body, a guide sleeve, and a damping group. The guide sleeve and the damping group are arranged in the outer seat body and coaxially sleeved outside the telescopic rod. The telescopic rod can slide along the guide sleeve and the damping group. The rod end spherical bearing includes a first rod end spherical bearing and a second rod end spherical bearing. The first rod end spherical bearing is fixed to one end of the telescopic rod and is rotatably connected to the fixed seat. The second rod end spherical bearing is fixed to the outer seat body and is arranged opposite to the first rod end spherical bearing. The second rod end spherical bearing is rotatably connected to the torque arm.
[0007] To facilitate the disassembly, assembly, and fixation of each component, lower connecting flanges and upper connecting flanges are respectively fixed at both ends of the outer seat body. The telescopic rod penetrates through the lower connecting flange and can slide along the lower connecting flange. The guide sleeve abuts against the lower connecting flange, and the second rod end spherical bearing is fixed to the upper connecting flange.
[0008] To prevent the leakage of lubricating oil inside the outer seat body and the entry of external dust, an O-ring seal is provided between the telescopic rod and the lower connecting flange.
[0009] In order to adapt to different reducer models and torque changes, several adjustment rings are provided between the guide sleeve and the damping group.
[0010] In order to lock the damping group, the adjustment rings and the guide sleeve in the outer housing, a locking round nut and a first locking nut are threadedly connected to one end of the telescopic rod away from the first rod end joint bearing. The locking round nut abuts against the damping group. The locking round nut can lock the damping group, the adjustment rings and the guide sleeve, and the first locking nut can lock the locking round nut.
[0011] In order to prevent the telescopic rod from sliding in the reverse direction, a reverse limit top plate capable of limiting the telescopic rod is fixed inside the upper connecting flange.
[0012] In order to accurately sense the position of the telescopic rod, an induction nut is fixed on the telescopic rod, and a proximity switch corresponding to the induction nut is fixed on the lower connecting flange.
[0013] In order to lock the first rod end joint bearing in place after installation, the first rod end joint bearing is threadedly connected to the telescopic rod, and a second locking nut capable of locking the first rod end joint bearing is provided on one side of the first rod end joint bearing.
[0014] In order to facilitate the relative rotation of the torque limiter and the reducer, the torque arm includes a connecting bottom plate, a support seat and a pin shaft. The connecting bottom plate is fixed to the reducer, the support seat is fixed on the connecting bottom plate, the pin shaft is fixed to one end of the support seat, and the second rod end joint bearing is rotatably connected to the pin shaft.
[0015] The present invention also provides a scraper conveyor, and the above-mentioned torque limiter is installed on the reducer of the scraper conveyor.
[0016] The beneficial effects of the present invention are as follows: The torque limiter and the scraper conveyor adopt buffer structures such as telescopic rods, outer housings, guide sleeves, damping groups, etc. When the reducer is running and encounters overload or abnormal operation, through the change of torque, the relative movement between the outer housing and the telescopic rod in the torque limiter drives the proximity switch to move, meeting the requirements of protecting the reducer and the motor. It has good stability and flexible adjustment, ensuring safety during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic structural diagram of the torque limiter of the present invention;
[0018] Figure 2 It is a schematic structural diagram of the main body of the torque limiter of the present invention;
[0019] Figure 3 It is a schematic structural diagram of the fixed seat of the present invention;
[0020] Figure 4 The front view of the torsion arm of the present utility model;
[0021] Figure 5 The top view of the torsion arm of the present utility model;
[0022] Figure 6 The front view of the scraper conveyor of the present utility model;
[0023] Figure 7 The top view of the scraper conveyor of the present utility model. Detailed implementation manners
[0024] The following elaborates on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making the protection scope of the present utility model more clearly defined.
[0025] Embodiment 1:
[0026] Such as Figure 1 shown, a torque limiter includes a fixed seat 3, a torque limiter main body 2 and a torsion arm 4. The bottom end of the torque limiter main body 2 is rotatably connected to the fixed seat 3, and the top end is rotatably connected to the reducer main body 1 through the torsion arm 4.
[0027] Specifically, as combined with Figure 2 shown, the torque limiter main body includes a rod end spherical bearing, a telescopic rod 203, an outer seat body 210, a guide sleeve 207 and a damping group 209. The rod end spherical bearing includes a first rod end spherical bearing 201 and a second rod end spherical bearing 218. Lower connecting flanges 205 and upper connecting flanges 217 are respectively fixed at both ends of the outer seat body 210;
[0028] Among them, the first rod end spherical bearing 201 is rotatably connected to the fixed seat 3 through a pin shaft. As combined with Figure 3 shown, the fixed seat assembly 301 is fixed by a bolt group 302, and the pin shaft 303 is fixed on the fixed seat assembly 301 through a washer 304 and a nut 305. The bottom end of the first rod end spherical bearing 201 is rotatably connected to the pin shaft 303;
[0029] The top end of the first rod end spherical bearing 201 is threadedly connected to the telescopic rod 203. After the first rod end spherical bearing 201 is installed in place, it is locked by a second locking nut 202 against the first rod end spherical bearing 201;
[0030] At the middle position of the telescopic rod 203, an induction nut 204 is installed through a set screw 213. The induction nut 204 can adjust its specific position according to the installation area of the telescopic rod 203. A proximity switch 214 corresponding to the induction nut 204 is fixed on the lower connecting flange 205. The proximity switch 214 is detachably connected to the lower connecting flange 205 through a bracket 215. When the outer housing 210 and the telescopic rod 203 move relative to each other, driving the movement of the bracket 215 and the proximity switch 214, when the proximity switch 214 senses the induction nut 204 on the telescopic rod 203, the reduction gear motor stops working, meeting the requirements of protecting the reduction gear and the motor;
[0031] The lower connecting flange 205 is detachably connected to the bottom end of the outer housing 210 through a number of bolts. The telescopic rod 203 can freely slide in the inner hole of the lower connecting flange 205. The cooperation between the two is relatively smooth, playing a guiding role to prevent the telescopic rod 203 from skewing. An O-ring 206 is installed in the middle to prevent the leakage of internal lubricating grease and the entry of external dust;
[0032] The guide sleeve 207 is sleeved inside the inner cavity of the outer housing 210 and outside the telescopic rod 203. The guide sleeve 207 can slide along the telescopic rod 203. The cooperation between the two is relatively smooth, playing a guiding role to prevent the telescopic rod 203 from skewing, and at the same time playing a reverse limiting role to prevent the unlimited sliding displacement of the telescopic rod;
[0033] The damping group 209 is used in combination with the adjusting ring 208. Both the damping group 209 and the adjusting ring 208 are sleeved outside the telescopic rod 203. The adjusting ring 208 is multi-layered and is arranged between the damping group 209 and the guide sleeve 207. By changing the reduction gear model and torque, the change amount of the damping group 209 and the actual correction are calculated for combined use. The torque Ma (N.M) of the reduction gear can be found from the corresponding value of the reduction gear in the selection manual. The force arm A is obtained through the specific assembly position of various reduction gears and then through a designed special torque arm to get the corresponding value. The damping group 209 is designed by calculating the force F in the torque limiter and through specific correction. Only after the torque limiter is corrected can it be installed corresponding to the matching reduction gear to achieve the protection effect on the reduction gear and the motor during use;
[0034] The top end of the telescopic rod 203 is threadedly connected with a locking round nut 211 and a first locking nut 212. The locking round nut 211 abuts against the damping group 209. The locking round nut 211 can lock the damping group 209, the adjusting ring 208 and the guide sleeve 207, and the first locking nut 212 can lock the locking round nut 211.
[0035] The outer housing 210 is the overall key housing, with the lower connecting flange 205 and the upper connecting flange 217 installed at its left and right ends respectively. The upper connecting flange 217 is threadedly connected to the bottom end of the second rod-end spherical bearing 218 and locked by a locking nut to ensure the dimensional stability.
[0036] The reverse limit top plate 216 is welded inside the upper connecting flange 217 to act as the highest limit for controlling the reverse displacement of the telescopic rod 203.
[0037] The second rod-end spherical bearing 218 is installed on a dedicated torque arm through a pin shaft. As shown in Figure 4 、 Figure 5 , the torque arm includes a connecting bottom plate 402, a support seat 401 and a pin shaft 404. The connecting bottom plate 402 is fixed to the speed reducer by bolts 403. The support seat 401 is fixed on the connecting bottom plate 402. The pin shaft 404 is fixed to one end of the support seat 401 through a washer 405 and a nut 406. The top end of the second rod-end spherical bearing is rotatably connected to the pin shaft 404.
[0038] Embodiment 2:
[0039] This embodiment provides a scraper conveyor. As shown in Figure 6 、 Figure 7 , the above torque limiter is installed on the speed reducer main body 1 of the scraper conveyor 5. The bottom end of the torque limiter main body 2 is rotatably connected to the fixed seat 3, and the top end is rotatably connected to the speed reducer main body 1 through the torque arm 4.
[0040] During the operation of the scraper conveyor, when encountering overload or abnormal operation, through the change of torque, the relative movement between the outer housing and the telescopic rod in the torque limiter drives the movement of the proximity switch bracket and the proximity switch 214. When the proximity switch 214 senses the induction nut 204 on the telescopic rod, the speed reducer stops working, meeting the requirements of protecting the speed reducer and the motor.
[0041] In the description of the embodiments of the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0042] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "between", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0043] It is possible to select some or all of the units according to actual needs to achieve the purpose of the solution of this embodiment.
[0044] Taking the above-mentioned ideal embodiment of the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A torque limiter, comprising a fixed seat, a torque limiter body and a torque arm. One end of the torque limiter body is rotatably connected to the fixed seat, and the other end is rotatably connected to the main body of the reducer through the torque arm. It is characterized in that: The torque limiter body includes a rod end spherical bearing, a telescopic rod, an outer housing, a guide sleeve and a damping group. The guide sleeve and the damping group are arranged in the outer housing and coaxially sleeved outside the telescopic rod. The telescopic rod can slide along the guide sleeve and the damping group. The rod end spherical bearing includes a first rod end spherical bearing and a second rod end spherical bearing. The first rod end spherical bearing is fixed to one end of the telescopic rod. The first rod end spherical bearing is rotatably connected to the fixed seat. The second rod end spherical bearing is fixed to the outer housing and is arranged opposite to the first rod end spherical bearing. The second rod end spherical bearing is rotatably connected to the torque arm.
2. The torque limiter according to claim 1, wherein: Lower connecting flanges and upper connecting flanges are respectively fixed at both ends of the outer housing. The telescopic rod penetrates through the lower connecting flange and can slide along the lower connecting flange. The guide sleeve abuts against the lower connecting flange. The second rod end spherical bearing is fixed to the upper connecting flange.
3. The torque limiter according to claim 2, wherein: An O-ring seal is arranged between the telescopic rod and the lower connecting flange.
4. The torque limiter according to claim 2, characterized in that: A plurality of adjusting rings are arranged between the guide sleeve and the damping group.
5. The torque limiter according to claim 4, characterized in that: A locking round nut and a first locking nut are threadedly connected to the end of the telescopic rod away from the first rod end spherical bearing. The locking round nut abuts against the damping group. The locking round nut can lock the damping group, the adjusting rings and the guide sleeve. The first locking nut can lock the locking round nut.
6. The torque limiter according to claim 5, characterized in that: A reverse limiting top plate capable of limiting the telescopic rod is fixed inside the upper connecting flange.
7. The torque limiter according to claim 2, wherein: An induction nut is fixed on the telescopic rod. A proximity switch corresponding to the induction nut is fixed on the lower connecting flange.
8. The torque limiter according to claim 1, wherein: The first rod end spherical bearing is threadedly connected to the telescopic rod. A second locking nut capable of locking the first rod end spherical bearing is provided on one side of the first rod end spherical bearing.
9. The torque limiter according to claim 1, wherein: The torque arm includes a connecting bottom plate, a support seat and a pin shaft. The connecting bottom plate is fixed to the speed reducer. The support seat is fixed on the connecting bottom plate. The pin shaft is fixed to one end of the support seat. The second rod end spherical bearing is rotatably connected to the pin shaft.
10. A scraper conveyor, characterized in that: The speed reducer of the scraper conveyor is installed with the torque limiter as described in any one of claims 1-9.