Dual-encoder power-off braking type servo wheel hub motor

Abstract

The utility model belongs to the technical field of wheel hub motor, concretely is a kind of double encoder power-off brake type servo wheel hub motor, including motor main body, wire and plug connector, the outside sleeve of wire is equipped with protective cover, and protective cover includes first cover shell and second cover shell, and first cover shell and second cover shell are respectively fixed by the first connecting hole plate of side portion, second connecting hole plate splicing.The utility model makes wire penetrate protective cover, so that the segment of its inside protective cover is S type, and both sides spring are connected by connecting piece on the inside of protective cover, and connecting piece is located at S type wire S type inner bend, and by the elastic support of first connecting piece,second connecting piece, allow wire to be smoothly stretched when being pulled, and automatically reset after external force disappears, avoid plastic deformation, the elastic coefficient of spring is adjustable, adapts to different traction force demand, and gives consideration to stability and flexibility, and connecting piece is covered with rubber sleeve, effectively absorb high-frequency vibration energy, reduce the friction loss of wire and connecting piece.

Description

Technical Field

[0001] This utility model belongs to the field of hub motor technology, specifically relating to a dual encoder power-off braking servo hub motor. Background Technology

[0002] The dual-encoder power-off braking servo hub motor is an integrated, high-performance drive device that combines servo control, hub direct drive, power-off safety braking, and multi-feedback systems. As a high-precision drive device, the dual-encoder power-off braking servo hub motor is widely used in industrial automation, robot joints, and electric vehicles. Its core function relies on stable signal transmission to an external motor driver, and the wires, as the critical connection medium, are exposed to complex operating conditions for extended periods.

[0003] In existing technologies, although conductors are designed with bending allowances (such as U-shaped or S-shaped), the following problems still exist: they are prone to mechanical damage, the bent sections lack rigid protection, and are susceptible to damage from external equipment movement, tool scratches, or vibration friction, which can lead to insulation layer damage or core breakage; in addition, their dynamic stability is insufficient, and the bent parts are prone to inelastic deformation during repeated pulling, and their recovery ability decreases after long-term use, which may cause poor contact or local stress concentration; furthermore, the current conductor fixing methods are limited, and traditional rubber sleeves only provide passive protection and cannot suppress conductor swaying, especially in high-speed motion scenarios, where swaying will aggravate wear and interfere with surrounding equipment.

[0004] Existing methods attempt to strengthen the outer sheath of the conductors or add fixing clips, but these do not resolve the contradiction between dynamic tension and elastic reset. Therefore, there is an urgent need for a dual-encoder power-off braking servo hub motor that combines conductor protection, dynamic adaptability, and positioning functions. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a dual-encoder power-off braking servo hub motor, which features good wire protection, strong dynamic adaptability, and stable positioning.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual-encoder power-off braking servo hub motor, comprising a motor body, wires, and connectors. One end of the motor body is electrically connected to the wires, and the end of the wires is fixedly connected to the connectors for connection with an external motor driver. A protective cover is sleeved on the outside of the wires. The protective cover includes a first cover and a second cover, which are respectively spliced ​​and fixed by a first connecting plate and a second connecting plate on their sides. A first mating groove on the top edge of the first cover and a third mating groove on the top edge of the second cover are spliced ​​to form a circular hole. A second mating groove on the bottom edge of the first cover... The mating groove and the fourth mating groove on the bottom edge of the second cover are spliced ​​to form a circular hole, and the upper and lower circular holes are used to pass through the wire; the inner wall of the first cover is symmetrically fixed with a first spring and a first mating cylinder fixedly connected to its end; the inner wall of the second cover is symmetrically fixed with a second spring and a second mating cylinder fixedly connected to its end; the first mating cylinder and the second mating cylinder are respectively connected by a first connector and a second connector with the same structure; the section of the wire located inside the protective cover is S-shaped, and the first connector and the second connector are respectively located at the inner bend of the S-shape of the wire; when the wire is stretched, dynamic support is achieved through the elastic displacement of the first connector and the second connector.

[0007] As a preferred technical solution of the dual encoder power-off braking servo hub motor of this utility model, the first connecting member includes a connecting block and a first insert block and a second insert block that are symmetrically fixed at both ends. The first insert block is inserted into the first docking cylinder, and the second insert block is inserted into the second docking cylinder. The outer side of the connecting block is fixedly fitted with a rubber sleeve, and the two ends of the rubber sleeve extend to cover the outer walls of the first docking cylinder and the second docking cylinder to buffer the friction of the wires.

[0008] As a preferred technical solution of the dual encoder power-off braking servo hub motor of this utility model, a first collar is sleeved on the inner side of the first docking groove and the third docking groove. The outer walls of both ends of the first collar are fixed with retaining rings, which are located on the inner and outer sides of the protective cover, respectively, to restrict the axial displacement of the first collar. The first collar is sleeved on the outer side of the wire. A second collar is sleeved on the inner side of the second docking groove and the fourth docking groove. The second collar has the same structure as the first collar and is sleeved on the outer side of the wire.

[0009] As a preferred technical solution of the dual encoder power-off braking servo hub motor of this utility model, both the first collar and the second collar are made of elastic material, and the inner circle size of both the first collar and the second collar is larger than the wire diameter, allowing the wire to slide axially and reducing wear.

[0010] As a preferred technical solution of the dual encoder power-off braking servo hub motor of this utility model, the first connecting plate and the second connecting plate are symmetrically provided with four holes, which are fixedly connected by fixing nails.

[0011] As a preferred technical solution of the dual encoder power-off braking servo hub motor of this utility model, a fixing hole plate is symmetrically arranged on one side wall of the first cover for fixing the protective cover to an external support.

[0012] As a preferred technical solution of the dual encoder power-off braking servo hub motor of this utility model, the protective cover is made of engineering plastic and the inner wall is provided with a shock-absorbing coating; the S-shaped bending arc of the wire matches the elastic displacement range of the first connector and the second connector to ensure that it can automatically reset after stretching.

[0013] As a preferred technical solution of the dual encoder power-off braking servo hub motor of this utility model, the elastic coefficients of the first spring and the second spring are adjustable to adapt to different traction force requirements.

[0014] Compared with the prior art, the beneficial effects of this utility model are: (1) This solution uses a protective cover, an S-shaped wire and a connector to pass the wire through the protective cover, so that the section inside the protective cover is S-shaped. The connector connects the springs on both sides inside the protective cover. At the same time, the connector is located at the inner bend of the S-shaped wire. Through the elastic support of the first connector and the second connector, the wire is allowed to stretch smoothly when pulled and automatically reset after the external force disappears, avoiding plastic deformation. The elastic coefficient of the spring is adjustable to adapt to different traction requirements, taking into account both stability and flexibility. At the same time, the connector is covered with a rubber sleeve to effectively absorb high-frequency vibration energy and reduce the friction loss between the wire and the connector. (2) This solution sets up a first cover and a second cover. The first cover and the second cover are spliced ​​together by connecting the perforated plate, which facilitates installation and maintenance. The spliced ​​cover has a collar inside the top and bottom holes. The elastic collar is sleeved on the outside of the wire, allowing the wire to slide axially while limiting radial displacement and preventing scratches. In addition, a fixing perforated plate is set on the outside of the cover, which can anchor the protective cover to the external support, suppress the overall shaking, and realize the stable protection and positioning of the curved wire by the protective cover. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the connection between the wire and the protective cover of this utility model; Figure 3 This is a three-dimensional sectional view of the protective cover of this utility model; Figure 4This is a three-dimensional schematic diagram of the first cover of this utility model; Figure 5 This is a three-dimensional schematic diagram of the second cover of this utility model.

[0016] In the diagram: 1. Motor body; 2. Wire; 3. Protective cover; 31. First cover; 311. Fixing plate; 312. First spring; 313. First docking cylinder; 314. First connecting plate; 315. First docking groove; 316. Second docking groove; 32. Second cover; 321. Second spring; 322. Second docking cylinder; 323. Second connecting plate; 324. Third docking groove; 325. Fourth docking groove; 33. First connector; 331. Connecting block; 332. First insert; 333. Second insert; 334. Rubber sleeve; 34. Second connector; 35. First collar; 351. Retaining ring; 36. Second collar; 37. Fixing nail; 4. Plug. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0018] In this embodiment, refer to Figure 1 As shown, specifically, a dual-encoder power-off braking servo hub motor includes a motor body 1, wires 2, and connectors 4. One end of the motor body 1 is electrically connected to the wires 2, and the end of the wires 2 is fixedly connected to the connectors 4 to connect to an external motor driver, realizing power transmission and control signal interaction. The dual encoders (usually incremental + absolute encoders) provide high-precision rotor position detection to ensure the accuracy of servo control. The dual encoders can serve as backups for each other, improving system reliability. In particular, the motor position is locked by the brake when the power is off. When the external power is interrupted, the built-in brake (such as electromagnetic brake or mechanical brake) is automatically activated to prevent the motor from losing control due to inertia or load, ensuring safe shutdown of the equipment. The specific structure and principle of the hub motor composed of the above structure can be referred to the existing technology, so they are not described in detail here. Reference Figure 2 , Figure 4 and Figure 5As shown, specifically, a protective cover 3 is sleeved on the outside of the conductor 2. The protective cover 3 is made of engineering plastic and has a shock-absorbing coating on its inner wall. The protective cover 3 includes a first cover 31 and a second cover 32. The first cover 31 and the second cover 32 are spliced ​​and fixed by the first connecting plate 314 and the second connecting plate 323 on the side, respectively. There are four symmetrical first connecting plates 314 and the second connecting plate 323, which are fixed by fixing nails 37. They are easy to assemble and disassemble. The two covers are the same size and there is no skewing or misalignment after splicing. The first mating groove 315 on the top edge of the first cover 31 and the third mating groove 324 on the top edge of the second cover 32 are spliced ​​to form a circular hole. The second mating groove 324 on the bottom edge of the first cover 31... The docking groove 316 and the fourth docking groove 325 on the bottom edge of the second cover 32 are spliced ​​to form a circular hole, and the upper and lower circular holes are used to pass through the wire 2; the side wall of the first cover 31 is symmetrically provided with fixing plate 311 for fixing the protective cover 3 to the external support; through the above technical solution, for the wire 2 with the reserved safe length, the protective cover 3 is sleeved on its outside, so that the end of the wire 2 located inside the protective cover 3 is bent into an S-shape, and the wire 2 can move and stretch when pulled. Through the protection of the protective cover 3, the bending part of the wire 2 is reduced by external force scratching and wear. At the same time, the protective cover 3 can be anchored to the external support through the fixing plate 311 to suppress the overall shaking and avoid the wire 2 shaking and scratching.

[0019] Reference Figure 2 As shown, specifically, a first collar 35 is fitted inside the first docking groove 315 and the third docking groove 324. Two retaining rings 351 are fixed to the outer walls of the two ends of the first collar 35, located on the inner and outer sides of the protective cover 3, respectively, restricting the axial displacement of the first collar 35. The first collar 35 is fitted onto the outer side of the wire 2. A second collar 36 is fitted inside the second docking groove 316 and the fourth docking groove 325. The second collar 36 has the same structure as the first collar 35 and is fitted onto the outer side of the wire 2. Both the first collar 35 and the second collar 36 are made of elastic material, such as rubber. The inner circle size of both the first collar 35 and the second collar 36 is larger than the wire diameter of the wire 2, allowing the wire 2 to slide axially and reducing wear. By fitting collars inside the holes at both ends of the protective cover 3, the collars are fitted onto the outer side of the wire 2 for protection, reducing wear on the wire 2 caused by the protective cover 3 when the wire 2 is pulled and moved. Example

[0020] In another embodiment of this solution, refer to Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, specifically, the inner wall of the first cover 31 is symmetrically fixed with a first spring 312 and a first docking cylinder 313 fixedly connected to its end; the inner wall of the second cover 32 is symmetrically fixed with a second spring 321 and a second docking cylinder 322 fixedly connected to its end; the first docking cylinder 313 and the second docking cylinder 322 are connected by a first connector 33 and a second connector 34 of the same structure; the first connector 33 includes a connecting block 331 and a first insert block 332 and a second insert block 333 fixedly at both ends; the first insert block 332 is inserted into the first docking cylinder 313, and the second insert block 333 is inserted into the second docking cylinder 322; the size of the insert block is adapted to the inner size of the docking cylinder, and after insertion, they fit tightly to avoid skewing under pressure; a rubber sleeve 334 is fixedly sleeved on the outer side of the connecting block 331. The two ends of the connector extend to cover the outer walls of the first docking cylinder 313 and the second docking cylinder 322 to buffer the friction of the wire 2 and improve the connection stability between the connector and the docking cylinder. The section of the wire 2 located inside the protective cover 3 is S-shaped. The first connector 33 and the second connector 34 are located at the inner bend of the S-shape of the wire 2, respectively. When the wire 2 is stretched, dynamic support is achieved through the elastic displacement of the first connector 33 and the second connector 34. That is, when the wire 2 is straightened, it will squeeze the first connector 33 and the second connector 34. The S-shaped bending arc of the wire 2 matches the elastic displacement range of the first connector 33 and the second connector 34 to ensure that it can automatically return to its original position after stretching. The elastic coefficients of the first spring 312 and the second spring 321 are adjustable. The specific elastic coefficients can be selected according to the actual application of the wire 2 to adapt to different traction force requirements. Specifically, through the above technical solution, while the protective cover 3 is placed on the outside of the bent section of the conductor 2 for protection, the inner side of the protective cover 3 can be connected by two connectors through springs, so that the two connectors are located at the two inner bends of the bent section of the conductor 2 (i.e. the two inner bends of the S-shaped structure). When the conductor 2 is stretched later, the spring can be deformed by squeezing the connectors to generate elastic force, thereby achieving elastic support for the conductor 2. This avoids the conductor 2 from being stretched and deformed too much, which would lead to the inability to recover later. Moreover, when the conductor 2 loses tension, it can recover through elastic support. Through the dynamic support of the connectors for the conductor 2, the risk of fatigue fracture at the bent part of the conductor 2 is significantly reduced.

[0021] The working principle and usage process of this utility model are as follows: When installing the hub motor wire 2, two elastic collars are sleeved on the outside of the wire 2. Then, a section of the wire 2 is temporarily bent into an S-shape using a tool. Subsequently, the first cover 31 and the second cover 32 are fixedly spliced ​​from both sides of the wire 2. First, the wire 2 is engaged with the first cover 31, so that the bent section of the wire 2 is located inside the cover, and both ends are engaged with the inner side of the mating groove at the end of the cover. At the same time, the collars are engaged with the inner side of the mating groove, preventing the wire 2 from contacting the cover and reducing friction. After connecting the wire 2 and the first cover 31, the operator connects the first connector 33 to the second connector 32. The connector 34 is inserted into the inner wall of the housing via an end plug and a spring-connected docking cylinder, so that the two connectors are located at the S-shaped inner bend of the conductor 2. Then, the operator aligns and splices the second housing 32 with the first housing 31, so that the docking cylinder inside the second housing 32 is also inserted into the end plug of the connector. Then, the two housings are fixed and spliced ​​through the docking hole plate, so that the connectors, together with the springs on the inner walls of the two housings, form an elastic support component that supports the S-shaped inner bend of the conductor 2. Then, the operator fixes the assembled protective cover 3 to the external support through the fixing hole plate 311, thereby achieving the positioning and protection of the conductor 2. During subsequent equipment operation, if the conductor 2 is pulled, the section inside the protective cover 3 will be stretched. When the S-shaped conductor 2 is stretched, it will squeeze the connector at the inner bend. Through the dynamic support mechanism of the connector, the risk of fatigue fracture at the bend is significantly reduced. After the conductor 2 loses its pulling force, it can be elastically supported and restored. The elastic coefficient of the spring is adjustable to adapt to different traction force requirements, taking into account both stability and flexibility.

[0022] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-encoder power-off braking servo hub motor, comprising a motor body, wires, and connectors, characterized in that: One end of the motor body is electrically connected to a wire, and the end of the wire is fixedly connected to a connector for connection with an external motor driver; The outer side of the conductor is fitted with a protective cover, which includes a first cover and a second cover. The first cover and the second cover are respectively spliced ​​and fixed by a first connecting plate and a second connecting plate on the side. The first mating groove on the top edge of the first cover and the third mating groove on the top edge of the second cover are joined together to form a circular hole. The second mating groove on the bottom edge of the first cover and the fourth mating groove on the bottom edge of the second cover are joined together to form a circular hole. The upper and lower circular holes are used to pass through the wires. The inner wall of the first cover is symmetrically fixed with a first spring and a first docking cylinder fixedly connected to its end. The inner wall of the second cover is symmetrically fixed with a second spring and a second docking cylinder fixedly connected to its end. The first docking cylinder and the second docking cylinder are connected by a first connector and a second connector with the same structure, respectively. The section of the conductor located inside the protective cover is S-shaped. The first connector and the second connector are located at the inner bend of the S-shape of the conductor, respectively. When the conductor is stretched, dynamic support is achieved through the elastic displacement of the first connector and the second connector.

2. The dual-encoder power-off braking servo hub motor according to claim 1, characterized in that: The first connector includes a connecting block and a first insert block and a second insert block that are symmetrically fixed at both ends. The first insert block is inserted into the first docking cylinder, and the second insert block is inserted into the second docking cylinder. The outer side of the connecting block is fixedly fitted with a rubber sleeve, and the two ends of the rubber sleeve extend to cover the outer walls of the first and second docking cylinders to buffer the friction of the wires.

3. The dual-encoder power-off braking servo hub motor according to claim 2, characterized in that: The first mating groove and the third mating groove are fitted with a first collar. The outer walls of the two ends of the first collar are fixed with retaining rings, which are located on the inner and outer sides of the protective cover, respectively, to restrict the axial displacement of the first collar. The first collar is fitted on the outside of the wire. The second mating groove and the inner side of the fourth mating groove are fitted with a second collar. The second collar has the same structure as the first collar and is fitted on the outside of the wire.

4. A dual-encoder power-off braking servo hub motor according to claim 3, characterized in that: Both the first and second collars are made of elastic material, and the inner circle size of both the first and second collars is larger than the wire diameter, allowing the wire to slide axially and reducing wear.

5. A dual-encoder power-off braking servo hub motor according to claim 4, characterized in that: Both the first and second connecting plate have four symmetrical holes, which are fixed together by fixing nails.

6. A dual-encoder power-off braking servo hub motor according to claim 5, characterized in that: The first cover has symmetrically arranged fixing holes on one side wall for fixing the protective cover to an external support.

7. A dual-encoder power-off braking servo hub motor according to claim 6, characterized in that: The protective cover is made of engineering plastic and has a shock-absorbing coating on the inner wall; The S-shaped bending arc of the conductor matches the elastic displacement range of the first connector and the second connector, ensuring that it can automatically reset after stretching.

8. A dual-encoder power-off braking servo hub motor according to claim 7, characterized in that: The elastic coefficients of the first and second springs are adjustable to adapt to different traction force requirements.

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