Brushless direct current motor capable of stably braking downhill

Abstract

The utility model discloses a brushless direct current motor stable in downhill braking, and relates to the technical field of direct current motors, the brushless direct current motor stable in downhill braking comprises a rack body and a driving mechanism, the bottom of the rack body is provided with a rack track, and two symmetrical support rollers are movably connected in the rack body. The rack track is in sliding connection with the rack body through the supporting rollers; the driving mechanism comprises a driving motor and a gearbox, the gearbox is fixedly connected to the side face of the rack body, a gear set in transmission fit with the rack track is arranged in the gearbox, and the end of the driving motor is in transmission connection with the gear set through a transmission belt; when the driving wheel rotates, the tooth grooves in the driving wheel are meshed with the gear teeth at the bottom of the rack track, the phenomenon that the connecting position slips due to the fact that carried materials are too heavy when the device goes uphill or downhill can be prevented through meshing, and therefore the risk of derailing is avoided.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of DC motors, and more specifically, it is a brushless DC motor with stable downhill braking. Background Art

[0002] A brushless DC motor with stable downhill braking is a type of motor with excellent performance. The main feature of this motor is that it can provide a stable and effective braking function when going downhill. Usually, through the control system inside the motor, parameters such as the rotation speed of the motor and the slope of the downhill are monitored, and the output torque of the motor is intelligently adjusted to achieve a stable braking effect.

[0003] However, in practice, it has been noted that existing brushless DC motors with stable slope braking are generally installed on material conveying equipment with tracks. The motor drives the driving wheel to rotate, and the forward movement is achieved by using the friction between the driving wheel and the track. Due to the heavy materials carried, slipping is likely to occur at the connection position when going uphill or downhill, resulting in the inability to drive the materials upward when going uphill, and the materials are likely to descend too fast and derail when going downhill. Also, derailment is likely to occur when turning at a high speed, which will all affect normal transportation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a brushless DC motor with stable downhill braking, which drives the equipment to move through meshing, and can prevent the equipment from slipping during uphill or downhill. Also, the rotation speed of the driving motor can be adjusted at any time through the motor decoder, so that it controls the moving speed according to the slope or turning radian to prevent derailment. To solve the technical problems proposed in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A brushless DC motor with stable downhill braking includes a frame body and a driving mechanism. A rack track is provided at the bottom of the frame body. Two symmetric support rollers are movably connected in the frame body, and the rack track is slidably connected to the frame body through the support rollers;

[0007] The driving mechanism includes a driving motor and a gearbox. The gearbox is fixedly connected to the side of the frame body, and a gear set that is in transmission cooperation with the rack track is provided in the gearbox. The end of the driving motor is in transmission connection with the gear set through a transmission belt.

[0008] As a further technical solution of the present utility model, the gear set includes a driving wheel, on which tooth grooves are arranged in an annular array. The driving wheel meshes with the bottom of the rack track through the tooth grooves. On one side of the driving wheel close to the gearbox, there is a first transmission shaft, and the first transmission shaft is movably connected to the gearbox through a bearing. The other end of the first transmission shaft is fixedly connected with a driven gear.

[0009] As a further technical solution of the present utility model, the end of the gearbox is movably connected with a second transmission shaft. The two ends of the second transmission shaft are respectively in interference fit with a driving gear and a driven pulley through flat keys, and the driving gear is located inside the gearbox.

[0010] As a further technical solution of the present utility model, at the end of the driving motor, there is a driving pulley corresponding to the driven pulley. The driven pulley and the driving pulley are respectively located at both inner ends of the transmission belt, and the transmission belt is respectively attached to the driven pulley and the driving pulley.

[0011] As a further technical solution of the present utility model, a cross plate is also fixedly connected to the end of the frame body. The driving motor is bolted above the cross plate, and on one side of the driving motor, there is also a motor decoder fixedly connected to the cross plate.

[0012] As a further technical solution of the present utility model, between the driven gear and the driving gear, there are also a first intermediate gear and a second intermediate gear, and the first intermediate gear and the second intermediate gear are coaxially arranged. The first intermediate gear and the second intermediate gear are movably connected to the gearbox.

[0013] As a further technical solution of the present utility model, the driven gear meshes with the first intermediate gear, and the driving gear meshes with the second intermediate gear.

[0014] As a further technical solution of the present utility model, a limiting wheel is movably connected to the bottom of the frame body. The limiting wheel is located on one side of the driving wheel close to the driving motor, and the limiting wheel is rotatably connected to the bottom of the rack track.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] In the present utility model, when the driving wheel rotates, the tooth grooves on the driving wheel mesh with the teeth at the bottom of the rack track. Through meshing, it can prevent the phenomenon of slipping at the connection due to the excessive weight of the carried materials when the equipment is going uphill or downhill, thus avoiding the risk of derailment.

[0017] In this utility model, the power on the output shaft of the driving motor is transmitted through the meshing between the driven gear, the first intermediate gear, the second intermediate gear and the driving gear. Since the transmission ratio is less than one, the power load required for the movement of the device can be reduced, and the usage requirements of the driving motor can be lowered.

[0018] In this utility model, the control signal is transmitted to the motor decoder through a wire, and then the driving motor is driven by the motor decoder. Moreover, the rotation speed of the driving motor can be adjusted, so that the moving speed of the device can be controlled according to the slope and radian during uphill, downhill or turning processes, preventing the device from derailing due to excessive speed. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural view of the utility model in the usage state.

[0020] Figure 2 is in the utility model Figure 1 from another perspective.

[0021] Figure 3 is in the utility model Figure 2 partial structural schematic view.

[0022] Figure 4 is in the utility model Figure 3 bottom structural schematic view.

[0023] Figure 5 is in the utility model Figure 4 partial enlarged schematic view.

[0024] Figure 6 is a three-dimensional structural schematic view of the frame body in the utility model.

[0025] Figure 7 is a three-dimensional structural schematic view of the limit wheel in the utility model.

[0026] Figure 8 is a three-dimensional structural schematic view of the gear set in the utility model.

[0027] In the figure:

[0028] Frame body - 1, cross plate - 2, driving motor - 3, driving pulley - 31, motor decoder - 4, gear box - 5, gear set - 6, driving wheel - 61, tooth groove - 62, first transmission shaft - 63, driven gear - 64, first intermediate gear - 65, second intermediate gear - 66, driving gear - 67, second transmission shaft - 68, driven pulley - 69, limit wheel - 7, guide wheel - 71, inverted trapezoidal groove - 72, fixed shaft - 73, connecting bearing - 74, rack track - 8, inclined guard plate - 9, transmission belt - 10, support roller - 11, end plate - 12. Detailed implementation mode

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figures 1 - 8 , the embodiment of the present utility model provides a downhill braking and stable brushless DC motor, which includes a frame body 1 and a driving mechanism. A rack track 8 is provided at the bottom of the frame body 1. Two symmetric support rollers 11 are movably connected in the frame body 1 to reduce the friction during movement. And the rack track 8 is slidably connected to the frame body 1 through the support rollers 11, so that the frame body 1 can move on the rack track 8;

[0031] The driving mechanism includes a driving motor 3 and a gear box 5. The gear box 5 is fixedly connected to the side of the frame body 1, and a gear set 6 that is in transmission cooperation with the rack track 8 is provided in the gear box 5. The end of the driving motor 3 is in transmission connection with the gear set 6 through a transmission belt 10.

[0032] In this embodiment, the gear set 6 includes a driving wheel 61. Tooth grooves 62 are arranged in an annular array on the driving wheel 61. The driving wheel 61 meshes with the bottom of the rack track 8 through the tooth grooves 62. A first transmission shaft 63 is provided on one side of the driving wheel 61 close to the gear box 5, and the first transmission shaft 63 is movably connected to the gear box 5 through a bearing. The other end of the first transmission shaft 63 is fixedly connected with a driven gear 64.

[0033] In this embodiment, a second transmission shaft 68 is movably connected to the end of the gear box 5. A driving gear 67 and a driven pulley 69 are respectively in interference fit with both ends of the second transmission shaft 68 through flat keys. Among them, the driving gear 67 is located inside the gear box 5 to transmit power and transmit the transmission outside the gear box 5 to the inside.

[0034] In this embodiment, a driving pulley 31 corresponding to the driven pulley 69 is provided at the end of the driving motor 3. The driven pulley 69 and the driving pulley 31 are respectively located at both inner ends of the transmission belt 10, and the transmission belt 10 is respectively in contact with the driven pulley 69 and the driving pulley 31. The driving motor 3 drives the driven pulley 69 to rotate through the transmission belt 10.

[0035] In this embodiment, a cross plate 2 is further fixedly connected to the end of the frame body 1. The driving motor 3 is bolted above the cross plate 2, and a motor decoder 4 fixedly connected to the cross plate 2 is provided on one side of the driving motor 3. The rotation speed of the driving motor 3 is controlled by the motor decoder 4 to adjust the moving speed up and down the slope or during turning, preventing derailment caused by excessive speed.

[0036] In this embodiment, a first intermediate gear 65 and a second intermediate gear 66 are further provided between the driven gear 64 and the driving gear 67, and the first intermediate gear 65 and the second intermediate gear 66 are coaxially arranged and are movably connected to the gearbox 5.

[0037] In this embodiment, the driven gear 64 meshes with the first intermediate gear 65, and the driving gear 67 meshes with the second intermediate gear 66. With a transmission ratio less than 1, the load requirement during movement is reduced, thereby reducing the load on the driving motor 3.

[0038] In this embodiment, a limiting wheel 7 is movably connected to the bottom of the frame body 1. The limiting wheel 7 is located on the side of the driving wheel 61 close to the driving motor 3, and the limiting wheel 7 is rotatably connected to the bottom of the rack track 8.

[0039] By adopting the above technical solution, the driving motor 3 drives the driving belt pulley 31 to rotate, transmits the power to the driven belt pulley 69 through the transmission belt 10, then drives the driving gear 67 to rotate through the second transmission shaft 68. Through the meshing between the driving gear 67 and the second intermediate gear 66, and between the first intermediate gear 65 and the driven gear 64, the driven gear 64 drives the driving wheel 61 to rotate through the first transmission shaft 63. Through the meshing between the tooth grooves 62 on the driving wheel 61 and the rack track 8, the frame body 1 is driven to slide on the rack track 8, and the support roller 11 rolls on the frame body 1 to reduce wear during movement. And through the meshing between the tooth grooves 62 and the rack track 8, when the frame body 1 goes uphill or downhill, slipping can be prevented, and the rotation speed of the driving motor 3 can be precisely controlled by the motor decoder 4, so as to decelerate in time when going downhill.

[0040] In this embodiment, a bearing is provided at the connection between the second transmission shaft 68 and the gearbox 5. The outer ring of the bearing is in interference fit with the gearbox, and the inner ring is in interference fit with the second transmission shaft 68, so that the driving gear 67 and the driven belt pulley 69 at both ends of the second transmission shaft 68 rotate synchronously to transmit the power.

[0041] In this embodiment, an inclined guard plate 9 is bolted to the bottom of the frame body 1, and the inclined guard plate 9 is located below the driving wheel 61 and the limiting wheel 7. One side of the inclined guard plate 9 close to the limiting wheel 7 is inclined to protect the bottoms of the driving wheel 61 and the limiting wheel 7, preventing the driving wheel 61 or the limiting wheel 7 from colliding with foreign objects at the bottom during movement and improving the protection effect.

[0042] In this embodiment, an auxiliary shaft rod is fixedly connected between the first intermediate gear 65 and the second intermediate gear 66, and the end of the auxiliary shaft rod is rotatably connected to the gearbox 5 through a bearing to transmit power and reduce the axial load received when the gearbox 5 is driven through a smaller transmission ratio.

[0043] In this embodiment, the frame body 1 has two parallel and symmetrical trapezoidal side plates. T-shaped plates are welded to the two trapezoidal side plates, and vertical end plates 12 are welded to the T-shaped plates. Holes for preventing wires are formed in the end plates 12. A hole plate for hanging the carriage is integrally provided at one end of the T-shaped plate away from the trapezoidal side plate.

[0044] Furthermore, one ends of the two trapezoidal side plates away from the T-shaped plates are welded to a cross plate 2, and the driving motor 3 on the cross plate 2 is electrically connected to the motor decoder 4 through a wire. A wire for connecting to the rear-end power supply is also provided on the motor decoder 4, and the end of the wire bypasses the driving motor 3 and penetrates through the hole in the end plate 12.

[0045] In this embodiment, the limiting wheel 7 includes a guide wheel 71. An inverted trapezoidal groove 72 is formed in the guide wheel 71, and the bottom of the rack track 8 is located in the inverted trapezoidal groove 72. When the frame body 1 moves, the guide wheel 71 rolls on the bottom of the rack track 8, and the rack track 8 is located in the inverted trapezoidal groove 72. When encountering a bend, the inverted trapezoidal groove 72 fits against the side of the rack track 8 and decelerates it through friction.

[0046] In this embodiment, the end of the guide wheel 71 is movably connected to a fixed shaft 73. A connecting bearing 74 is in interference fit between the fixed shaft 73 and the guide wheel 71, and the end of the fixed shaft 73 is fixedly connected to the frame body 1.

[0047] The working principle of the utility model is as follows: when in use, first, the trailer with materials is hooked to the orifice plate at the end of the frame body 1. The driving motor 3 is controlled by the motor decoder 4 to rotate. The driving motor 3 drives the driving pulley 31 at the end to rotate. The driving pulley 31 drives the driven pulley 69 to rotate through the transmission belt 10. Then, the driving gear 67 is driven to rotate by the second transmission shaft 68. The driving gear 67 meshes with the second intermediate gear 66, and the first intermediate gear 65 meshes with the driven gear 64. The first transmission shaft 63 is driven to rotate through gear transmission, so as to drive the driving wheel 61 to roll at the bottom of the rack track 8. At this time, the tooth groove 62 on the outer side of the driving wheel 61 meshes with the bottom of the rack track 8, so that the frame body 1 slides on the rack track 8. And the supporting roller 11 on the frame body 1 fits on the top of the rack track 8. When the frame body 1 moves, the supporting roller 11 will roll on the rack track 8, and the limiting wheel 7 rolls at the bottom of the rack track 8 to prevent the equipment from derailing. When going downhill or turning, the motor decoder 4 controls the driving motor 3 to reduce the rotation speed, so as to slow down the moving speed of the equipment and prevent the equipment from derailing due to too fast speed.

[0048] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0049] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A brushless DC motor with stable braking during downhill, characterized in that: It includes a frame body (1) and a driving mechanism. A rack track (8) is provided at the bottom of the frame body (1). Two symmetrical support roller wheels (11) are movably connected in the frame body (1), and the rack track (8) is slidably connected to the frame body (1) through the support roller wheels (11). The driving mechanism includes a driving motor (3) and a gearbox (5). The gearbox (5) is fixedly connected to the side of the frame body (1), and a gear set (6) in transmission cooperation with the rack track (8) is provided in the gearbox (5). The end of the driving motor (3) is in transmission connection with the gear set (6) through a transmission belt (10).

2. The brushless DC motor for downhill braking with stable braking according to claim 1, characterized in that: The gear set (6) includes a driving wheel (61). Tooth grooves (62) are formed in the driving wheel (61) in an annular array. The driving wheel (61) is meshed with the bottom of the rack track (8) through the tooth grooves (62). A first transmission shaft (63) is provided on one side of the driving wheel (61) close to the gearbox (5), and the first transmission shaft (63) is movably connected to the gearbox (5) through a bearing. The other end of the first transmission shaft (63) is fixedly connected with a driven gear (64).

3. The brushless DC motor for downhill braking with stable braking according to claim 2, wherein: A second transmission shaft (68) is movably connected to the end of the gearbox (5). A driving gear (67) and a driven pulley (69) are respectively in interference fit with the two ends of the second transmission shaft (68) through flat keys, and the driving gear (67) is located inside the gearbox (5).

4. The brushless DC motor with stable downhill braking according to claim 3, characterized in that: A driving pulley (31) corresponding to the driven pulley (69) is provided at the end of the driving motor (3). The driven pulley (69) and the driving pulley (31) are respectively located at both inner ends of the transmission belt (10), and the transmission belt (10) is respectively in contact with the driven pulley (69) and the driving pulley (31).

5. The brushless DC motor for downhill braking with stable braking according to claim 1, wherein: A cross plate (2) is further fixedly connected to the end of the frame body (1). The driving motor (3) is bolted above the cross plate (2), and a motor decoder (4) fixedly connected to the cross plate (2) is further provided on one side of the driving motor (3).

6. The brushless DC motor for downhill braking with stable braking according to claim 3, wherein: A first intermediate gear (65) and a second intermediate gear (66) are further provided between the driven gear (64) and the driving gear (67), and the first intermediate gear (65) and the second intermediate gear (66) are coaxially arranged. The first intermediate gear (65) and the second intermediate gear (66) are movably connected to the gearbox (5).

7. The brushless DC motor with smooth downhill braking according to claim 6, characterized in that: The driven gear (64) is meshed with the first intermediate gear (65), and the driving gear (67) is meshed with the second intermediate gear (66).

8. The brushless DC motor with stable downhill braking according to claim 2, wherein: A limit wheel (7) is movably connected to the bottom of the frame body (1). The limit wheel (7) is located on the side of the driving wheel (61) close to the driving motor (3), and the limit wheel (7) is rotatably connected to the bottom of the rack track (8).

Images