High speed geared motor

Abstract

This invention discloses a high-speed geared motor in the field of automotive motor technology, comprising a housing, a shaft located at the center of the housing, a motor assembly located on the shaft and within the housing, a conductor with one end connected to the motor assembly and the other end penetrating the outer wall of the shaft and located on the outside of the housing, and a connecting terminal located at the other end of the conductor, and a protective component located at the connection position between the conductor and the shaft. This invention, by providing a protective component at the connection position between the conductor and the shaft, effectively buffers the conductor when it is bent through structures such as a protective sleeve, support frame, and elastic connection part, reducing the probability of damage to the connection point due to repeated bending, thereby ensuring the long-term stability of motor power transmission and signal control, and improving the overall reliability of the high-speed geared motor.

Description

Technical Field

[0001] This invention relates to the field of automotive motors, and more specifically to high-speed geared motors. Background Technology

[0002] High-speed geared motors are widely used in light electric vehicles such as electric bicycles. They typically include a shaft fixed to the frame, a housing that can rotate relative to the shaft, a motor assembly mounted on the shaft and located inside the housing, and wires that pass through the outer wall of the shaft and are connected to the controller via waterproof terminals. Existing high-speed geared motors have the following drawbacks during use: In actual vehicle operation, the reciprocating motion of the suspension system, wheel steering, and vibrations and impacts caused by road bumps can cause the wires to be repeatedly bent at the outlet of the shaft. Over time, this can easily lead to wire damage, resulting in motor phase loss, signal loss, or electrical short circuits. To address this, we propose a high-speed geared motor that can reduce the probability of wire bending damage. Summary of the Invention

[0003] The purpose of this invention is to provide a high-speed geared motor that solves the technical problems mentioned in the background section.

[0004] The present invention achieves the above objectives through the following technical solutions: A high-speed geared motor includes a housing, a shaft located at the center of the housing, a motor assembly located on the shaft and inside the housing, a wire with one end connected to the motor assembly and the other end passing through the outer wall of the shaft and located outside the housing, and a connecting terminal located at the other end of the wire, and a protective component located at the connection position between the wire and the shaft. The protective assembly includes a protective sleeve disposed on the outer wall of the shaft and movably sleeved on the outside of the conductor. A support frame is provided inside the protective sleeve. The support frame is sleeved on the outer wall of the conductor. The outer circumferential wall of the support frame is provided with several sets of elastic connecting parts, and the end of the elastic connecting part away from the support frame is connected to the inner wall of the protective sleeve.

[0005] A further improvement is that the elastic connection part is provided in four sets, respectively located around the support frame. The inner wall of the support frame is provided with several sets of movable seats in a circular array. The movable seats correspond one-to-one with the elastic connection part. The inner wall of the movable seats is embedded with several sets of elastic balls for rolling contact with the outer wall of the wire.

[0006] A further improvement is that the elastic connection part includes a connecting cylinder with one end connected to the inner wall of the protective sleeve, a compression rod movably inserted into the other end of the connecting cylinder, and an elastic structure connecting the compression rod and the inner wall of one side of the connecting cylinder. The end of the compression rod away from the connecting cylinder is slidably connected to the outer wall of the support frame.

[0007] A further improvement is that the movable seat is slidably connected to the inner wall of the support frame via a sliding groove formed by a slider, so that the movable seat can move axially relative to the support frame. An elastic element is provided between the slider and the sliding groove. A cavity is provided inside the movable seat and on one side of the sliding groove. A piston is provided in the cavity. One end of the piston extends into the sliding groove and is connected to the slider. The cavity is connected to the connecting cylinder in the corresponding elastic connection part through a connecting pipe. The connecting cylinder is filled with a pressure medium outside the compression rod. When the compression rod moves outward, it compresses the pressure medium, causing it to enter the cavity through the connecting pipe. The pressure medium entering the cavity drives the piston to move the slider and the movable seat away from the axis.

[0008] A further improvement is that the protective assembly also includes a clamping member slidably disposed within the protective sleeve and located inside the support frame. The clamping member clamps the outer wall of the conductor. A positioning part is provided inside the protective sleeve and inside the clamping member. The conductor is located at the positioning part and forms an arc-shaped relaxation section through the positioning part. The clamping member is used to move axially with the conductor, and the positioning part is used to cause the relaxation section to expand or contract when the clamping member moves.

[0009] A further improvement is that the clamping member includes a movable frame, on which clamping blocks for clamping on the outer wall of the wire are symmetrically arranged. The clamping blocks and the movable frame are slidably connected, and an elastic connector is provided at the connection between the clamping blocks and the movable frame.

[0010] A further improvement is that the positioning part includes a limiting seat provided on the inner wall of the protective sleeve, the limiting seat is provided with an arc-shaped groove that cooperates with the relaxation section, and an elastic telescopic member is provided on the inner wall of the protective sleeve on one side relative to the limiting seat. The end of the elastic telescopic member is rotatably provided with a contact roller for pressing the relaxation section into the arc-shaped groove.

[0011] A further improvement is that the protective sleeve has a mounting ring at one end away from the shaft, the mounting ring is movably sleeved on the outside of the wire, and the mounting ring has multiple sets of cleaning components for cleaning the wire arranged in a circular array.

[0012] The beneficial effects of this invention are as follows: This invention provides a protective component at the connection between the conductor and the shaft. This component, through structures such as a protective sleeve, support frame, and elastic connection, effectively buffers the conductor when it is bent, reducing the probability of damage to the connection between the conductor and the shaft due to repeated bending. This ensures the long-term stability of the motor's power transmission and signal control, and improves the overall reliability of the high-speed toothed motor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the high-speed toothed motor structure of the present invention; Figure 2For the present invention Figure 1 Structural sectional view; Figure 3 This is a schematic diagram of the protective components and shaft connection structure in this invention; Figure 4 This is a schematic diagram of the protective component structure in this invention; Figure 5 For the present invention Figure 4 Structural sectional view; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of structure A in the image; Figure 7 This is a schematic diagram of the internal structure of the protective sleeve of the present invention.

[0014] In the diagram: 1. Housing; 2. Shaft; 3. Motor assembly; 4. Wire; 401. Relaxation section; 5. Connecting terminal; 6. Protective component; 61. Protective sleeve; 62. Support frame; 63. Connecting cylinder; 64. Elastic structure; 65. Cavity; 66. Piston; 67. Connecting pipe; 68. Movable seat; 69. Elastic ball; 610. Movable frame; 611. Clamping block; 612. Elastic connecting component; 613. Mounting ring; 614. Cleaning component; 615. Limiting seat; 616. Elastic telescopic component; 617. Contact roller. Detailed Implementation

[0015] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content. Example 1

[0016] Please see the appendix Figure 1-3A high-speed geared motor includes a housing 1, specifically, the housing 1 is an electric vehicle wheel hub structure, a shaft 2 located at the center of the housing 1 (both ends of the shaft 2 have frame fasteners for connection to the electric vehicle frame), a motor assembly 3 located on the shaft 2 and inside the housing 1 (the motor assembly 3 is an integrated structure in the prior art, including, but not limited to, the following components: rotor, magnetic ring, stator, planetary gear, sun gear, clutch, large gear ring, skeleton oil seal, speed measuring magnet, position sensor (Hall) and Hall PCB integrated board, etc.), a wire 4 connected at one end to the motor assembly 3 and passing through the outer wall of the shaft 2 and located on the outside of the housing 1 (the wire 4 is used to transmit signals and power), and a connection terminal 5 located at the other end of the wire 4 (the connection terminal 5 preferably adopts a waterproof terminal widely used in the art, which will not be described in detail here). It should be noted that in the prior art, the shaft 2 of the high-speed geared motor remains fixed and does not rotate after being connected to the electric vehicle frame, so it will not cause the wire 4 to rotate and become entangled. It also includes a protective component 6 located at the connection position between the wire 4 and the shaft 2. The protective component 6 effectively protects the part of the wire 4 connected to the shaft 2, thereby reducing the damage caused by repeated bending of this part of the wire 4 due to factors such as suspension reciprocating motion, wheel steering and road vibration during vehicle operation, and thus reducing the probability of failures such as motor phase loss, signal loss or electrical short circuit caused by this. Please see the appendix Figure 3-7 The protective component 6 includes a protective sleeve 61 disposed on the outer wall of the shaft 2 and movably sleeved on the outside of the conductor 4. In this embodiment, the protective sleeve 61 and the shaft 2 can be detachably fixed by means of threaded connection, snap-fit, or flange connection, so as to facilitate disassembly and maintenance. A support frame 62 is provided inside the protective sleeve 61. The support frame 62 is used to provide radial support and positioning for the conductor 4. The support frame 62 is sleeved on the outer wall of the conductor 4. The outer circumferential wall of the support frame 62 is provided with several sets of elastic connecting parts, and the end of the elastic connecting part away from the support frame 62 is connected to the inner wall of the protective sleeve 61. When the conductor 4 is bent, the bending force is transmitted to the support frame 62. The support frame 62 squeezes the elastic connecting parts in the corresponding direction to achieve elastic buffering, reduce the probability of damage to the conductor 4, ensure the long-term stability of motor power transmission and signal control, and improve the overall reliability of the high-speed toothed motor.

[0017] Preferably, in this embodiment, there are four sets of elastic connecting parts, which are respectively arranged around the support frame 62. The inner wall of the support frame 62 is provided with several sets of movable seats 68 in a circular array. The movable seats 68 correspond one-to-one with the elastic connecting parts, that is, there are also four sets of movable seats 68. The inner wall of the movable seats 68 is embedded with several sets of elastic balls 69 (such as rolling bodies covered with an elastic material layer) for rolling contact with the outer wall of the wire 4. The wear between the outer wall of the wire 4 and the support frame 62 is reduced by the elastic balls 69, and the sheath of the wire 4 is prevented from being damaged.

[0018] Preferably, the elastic connection part in this embodiment includes a connecting cylinder 63 with one end connected to the inner wall of the protective sleeve 61, a compression rod movably inserted into the other end of the connecting cylinder 63, the compression rod having a T-shaped vertical cross-section, and an elastic structure 64 connecting the compression rod and one side of the inner wall of the connecting cylinder 63 (the elastic structure 64 can be a spring or a rubber elastomer, one end of the elastic structure 64 is connected to the compression rod, and the other end is connected to the inner wall of the connecting cylinder 63). The end of the compression rod away from the connecting cylinder 63 is slidably connected to the outer wall of the support frame 62. Specifically, the end of the compression rod away from the connecting cylinder 63 is provided with... The support frame 62 has a T-shaped slider and a corresponding T-shaped groove on its outer wall. The T-shaped slider and the T-shaped groove cooperate to achieve a sliding connection. The vertical cross-section of the support frame 62 is rectangular, and a through-hole is opened in the middle for the wire 4 to pass through and for the installation of structures such as the movable seat 68. The compression rod and the outer wall of the support frame 62 are connected by the sliding cooperation of the T-shaped slider and the T-shaped groove, so that each elastic connection part can move independently without interfering with each other. In addition, there is a certain gap between the end of the compression rod located inside the connecting cylinder 63 and the inner wall of the connecting cylinder 63, so that the movement of the support frame 62 is not restricted.

[0019] Preferably, in this embodiment, the movable seat 68 is slidably connected to the inner wall of the support frame 62 via a sliding groove formed by a slider, so that the movable seat 68 can move axially relative to the support frame 62. An elastic element (which can be a spring or a rubber elastomer, with one end of the elastic element connected to the slider and the other end connected to the inner wall of one side of the sliding groove) is provided between the slider and the sliding groove. A cavity 65 (which can be a cylindrical cavity) is provided inside the movable seat 68 and located on one side of the sliding groove. A piston 66 is provided inside the cavity 65. The piston 66 includes a piston rod and a piston, and has a T-shaped vertical cross section. One end of the piston 66 extends into the sliding groove and is connected to the slider (a sealing ring is provided at the connection between the piston 66 and the cavity 65 to ensure sealing). The cavity 65 is connected to the connecting cylinder 63 in the corresponding elastic connection part through a connecting pipe 67 (which can be a flexible hose). The connecting cylinder 63, located outside the compression rod, is filled with a pressure medium (such as hydraulic oil or compressed gas). When the compression rod moves outward, it compresses the pressure medium, causing it to enter the cavity 65 through the connecting pipe 67. The pressure medium entering the cavity 65 drives the piston 66, which in turn moves the slider and movable seat 68 away from the shaft 2. It should be noted that the compression rod is the same as the piston 66. Specifically, when the wire 4 bends, it causes the support frame 62 to squeeze the corresponding compression rod, causing the compression rod to move outward relative to the connecting cylinder 63. During the outward movement, the compression rod compresses the pressure medium in the connecting cylinder 63, causing the pressure medium to enter the corresponding cavity 65 through the connecting pipe 67. The pressure medium entering the cavity 65 drives the piston 66, which in turn moves the corresponding slider and movable seat 68 away from the shaft 2, increasing the support area for the wire 4. This provides additional buffer support for the wire 4 in the bending area, further reducing the probability of the wire 4 being damaged by bending. It should be noted that both the cavity 65 and the connecting cylinder 63 have vents to facilitate the movement of the piston 66 and the compression rod. Example 2

[0020] Please see the appendix Figure 4-7 Based on Embodiment 1, the protective component 6 of this embodiment further includes a clamping member slidably disposed within the protective sleeve 61 and located inside the support frame 62. The clamping member clamps the outer wall of the wire 4. A positioning part is provided inside the protective sleeve 61 and inside the clamping member. An arc-shaped relaxation section 401 is formed at the position of the wire 4 at the positioning part. The relaxation section 401 is a redundant bent portion with a set arc and length pre-arranged at the positioning part during installation. The clamping member is used to move axially with the wire 4, and the positioning part is used to cause the relaxation section 401 to expand or contract when the clamping member moves. When the wire 4 is subjected to When bent or stretched, the conductor 4 will generate an axial tensile force, and the clamping member will move away from the shaft 2 along with the conductor 4. The movement of the clamping member causes the arc-shaped relaxation section 401 to unfold horizontally under the constraint of the positioning part, thereby effectively compensating for and absorbing the load generated by the bending or stretching of the conductor 4. When the external force decreases, the clamping member moves towards the shaft 2 under the action of the positioning part, causing the arc-shaped relaxation section 401 to retract and return to the initial arc shape, reserving sufficient deformation margin for the next stress. This method further reduces the probability of damage to the conductor 4 and improves the durability of the conductor 4 and the reliability of the electrical connection of the whole machine.

[0021] Preferably, the clamping component in this embodiment includes a movable frame 610. The movable frame 610 is symmetrically provided with clamping blocks 611 for clamping the outer wall of the conductor 4. The outer wall of the clamping block 611 facing the conductor 4 is an arc-shaped curved surface that matches the outer diameter of the conductor 4, and an elastic rubber layer is provided on this outer wall. The elastic rubber layer can be made of silicone rubber or polyurethane elastomer material to increase the friction coefficient between the clamping block 611 and the outer wall of the conductor 4 and provide buffer protection. The clamping block 611 and the movable frame 610 are slidably connected. Specifically, the T-shaped slider provided on the clamping block 611 can slide and engage with the corresponding T-shaped groove on the movable frame 610. An elastic connector 612 is provided at the connection between the clamping block 611 and the movable frame 610. The elastic connector 612, such as a spring or a rubber elastic column, is connected at one end to the T-shaped slider and at the other end to the inner wall of one side of the T-shaped groove.

[0022] Preferably, in this embodiment, the positioning part includes a limiting seat 615 disposed on the inner wall of the protective sleeve 61. The limiting seat 615 has an arc-shaped groove that mates with the relaxation section 401. The inner wall contour of the arc-shaped groove matches the arc curvature of the relaxation section 401 in the contracted state. An elastic rubber layer may be disposed on the arc-shaped groove. An elastic telescopic member 616 (which may be an elastic telescopic rod) is disposed on the inner wall of the protective sleeve 61 on one side relative to the limiting seat 615. The end of the elastic telescopic member 616 is rotatably provided with a contact roller 617 for pressing the relaxation section 401 into the arc-shaped groove. (617 can be a rubber roller). When the clamping member moves the wire 4 away from the shaft 2 when the wire 4 is stretched or bent, the relaxation section 401 gradually unfolds under the action of tension and moves outward along the arc groove. During the unfolding process, the relaxation section 401 generates a pushing force on the contact roller 617, causing the contact roller 617 to compress the elastic telescopic member 616. When the external force on the wire 4 is eliminated, the elastic telescopic member 616 drives the contact roller 617 to move inward and squeeze the wire 4, pushing the relaxation section 401 to press back into the arc groove. At the same time, the clamping member is reset, so that the wire 4 returns to the initial arc-shaped relaxation state.

[0023] Please see the appendix Figure 4Preferably, in this embodiment, the protective sleeve 61 is provided with a mounting ring 613 at the end away from the shaft 2. The mounting ring 613 is fixed to the protective sleeve 61 by a snap-fit ​​connection or by a detachable method such as bolts. The mounting ring 613 is movably sleeved on the outside of the conductor 4 and maintains a gap with the conductor 4 to ensure that the conductor 4 can move freely axially. The mounting ring 613 is provided with multiple sets of cleaning components 614 for cleaning the conductor 4 in a circular array. The cleaning components 614 can be cleaning bristles, elastic scrapers, sponge components, etc. When the conductor 4 moves axially, the cleaning components 614 form a comprehensive cleaning of the outer wall of the conductor 4, removing the impurities attached to the surface of the conductor 4. This effectively prevents external impurities from being brought into the interior of the protective sleeve 61 with the movement of the conductor 4 and affecting the internal components of the protective sleeve 61, thereby improving the operational reliability and service life of the protective component 6 and providing an important guarantee for the electrical connection stability of the high-speed toothed motor under outdoor conditions.

[0024] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A high-speed geared motor comprising a housing (1), a shaft portion (2) provided at the center of the housing (1), a motor assembly (3) provided on the shaft portion (2) and located inside the housing (1), a lead wire (4) having one end connected to the motor assembly (3) and the other end penetrating the outer wall of the shaft portion (2) and located outside the housing (1), and a connection terminal (5) provided at the other end of the lead wire (4), characterized in that, It also includes a protective assembly (6) located at the connection point between the conductor (4) and the shaft (2); The protective component (6) includes a protective sleeve (61) disposed on the outer wall of the shaft (2) and movably sleeved on the outside of the conductor (4). The protective sleeve (61) is provided with a support frame (62), which is sleeved on the outer wall of the conductor (4). The outer circumferential wall of the support frame (62) is provided with several sets of elastic connecting parts, and the end of the elastic connecting part away from the support frame (62) is connected to the inner wall of the protective sleeve (61).

2. The high speed toothed electric motor of claim 1, wherein, The elastic connection part is provided in four sets, which are respectively located around the support frame (62). The inner wall of the support frame (62) is provided with several sets of movable seats (68) in a circular array. The movable seats (68) correspond one-to-one with the elastic connection part. The inner wall of the movable seat (68) is embedded with several sets of elastic balls (69) for rolling contact with the outer wall of the wire (4).

3. The high speed toothed electric motor of claim 2, wherein, The elastic connection includes a connecting cylinder (63) with one end connected to the inner wall of the protective sleeve (61), a compression rod movably inserted into the other end of the connecting cylinder (63), and an elastic structure (64) connecting the compression rod and the inner wall of one side of the connecting cylinder (63). The end of the compression rod away from the connecting cylinder (63) is slidably connected to the outer wall of the support frame (62).

4. The high speed toothed electric motor of claim 3, wherein, The movable seat (68) is slidably connected to the inner wall of the support frame (62) by a sliding groove formed by a slider, so that the movable seat (68) can move axially relative to the support frame (62). An elastic element is provided between the slider and the groove. A cavity (65) is provided in the movable seat (68) and on one side of the groove. A piston (66) is provided in the cavity (65). One end of the piston (66) extends into the groove and is connected to the slider. The cavity (65) is connected to the connecting cylinder (63) in the corresponding elastic connection part through a connecting pipe (67). The connecting cylinder (63) is filled with a pressure medium outside the compression rod. When the compression rod moves outward, it compresses the pressure medium, causing it to enter the cavity (65) through the connecting pipe (67). The pressure medium entering the cavity (65) drives the piston (66) to move the slider and the movable seat (68) away from the shaft (2).

5. The high speed toothed electric motor of claim 1, wherein, The protective component (6) further includes a clamping member that is slidably disposed inside the protective sleeve (61) and located inside the support frame (62). The clamping member clamps the outer wall of the conductor (4). A positioning part is provided inside the protective sleeve (61) and inside the clamping member. The conductor (4) is located at the positioning part and forms an arc-shaped relaxation section (401) through the positioning part. The clamping member is used to move axially with the conductor (4). The positioning part is used to cause the relaxation section (401) to expand or contract when the clamping member moves.

6. The high speed toothed electric motor of claim 5, wherein, The clamping component includes a movable frame (610), on which clamping blocks (611) for clamping on the outer wall of the wire (4) are symmetrically provided. The clamping blocks (611) and the movable frame (610) are slidably connected, and an elastic connector (612) is provided at the connection between the clamping blocks (611) and the movable frame (610).

7. The high speed toothed electric motor of claim 5, wherein, The positioning part includes a limiting seat (615) provided on the inner wall of the protective sleeve (61). The limiting seat (615) has an arc-shaped groove that cooperates with the relaxation section (401). The inner wall of the protective sleeve (61) on one side opposite to the limiting seat (615) is provided with an elastic telescopic member (616). The end of the elastic telescopic member (616) is rotatably provided with a contact roller (617) for pressing the relaxation section (401) into the arc-shaped groove.

8. The high speed toothed electric motor of claim 1, wherein, The protective sleeve (61) has a mounting ring (613) at one end away from the shaft (2). The mounting ring (613) is movably sleeved on the outside of the wire (4). The mounting ring (613) has multiple sets of cleaning parts (614) arranged in a ring array for cleaning the wire (4).

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