Motor assembly for air supply system of vehicle air suspension

Abstract

The utility model discloses a motor assembly for a vehicle air suspension air supply system, which comprises a motor shell arranged on a valve body of the air suspension air supply system, a motor main shaft arranged in the middle of the motor shell, a motor iron core arranged at the upper part of the motor main shaft, and a magnetic shoe arranged between the radial outer side of the motor iron core and the motor shell. A commutator is installed on the motor main shaft and located on the lower side of the motor iron core, a fixing framework matched with the motor shell for limiting is installed on the lower side of the commutator, a plurality of carbon brush assemblies matched with the commutator are installed on the upper side of the fixing framework, and each carbon brush assembly comprises a carbon brush box and a carbon brush arranged in the carbon brush box. The end face, making contact with the commutator, of the carbon brush is the tooth-shaped end face, the carbon brush assembly can be effectively limited through the fixing framework, the carbon brush is protected and guided through the carbon brush box, the contact area between the carbon brush and the commutator can be increased through the tooth-shaped end face, resistance is reduced, and therefore the stability of motor current transmission is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle air suspension air supply system, specifically a motor assembly for a vehicle air suspension air supply system. Background Technology

[0002] Closed-loop air supply units (ASUs) are gaining increasing attention from end-users due to their high inflation efficiency. Throughout the entire lifecycle of a closed-loop air supply unit, the ASU plays a crucial role in transporting gas between the air spring and the air tank, moving gas from the air spring to the air tank or vice versa. This function relies heavily on the operation of a motor; therefore, the motor is an indispensable part of the air supply unit. In the structure of a brushed motor, the carbon brush, matched with the commutator, is a key sliding component that changes the direction of current. Currently, the contact between the carbon brush and the commutator is generally an arc surface with a relatively small contact area, resulting in high resistance and instability in the motor's current transmission. Utility Model Content

[0003] This invention provides a motor assembly for a vehicle air suspension supply system, which can solve the problems of high resistance between the carbon brush and the commutator and instability in motor current transmission.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a motor assembly for a vehicle air suspension supply system, comprising a motor housing mounted on a valve body of the air suspension supply system, a motor spindle mounted in the middle of the motor housing, a motor core mounted on the upper part of the motor spindle, a magnetic tile mounted between the radial outer side of the motor core and the motor housing, a commutator mounted on the motor spindle below the motor core, a fixed frame with a matching and limiting function mounted on the lower side of the commutator, and a plurality of carbon brush assemblies matching the commutator mounted on the upper side of the fixed frame, each carbon brush assembly comprising a carbon brush box and carbon brushes disposed within the carbon brush box, wherein the end face of the carbon brushes in contact with the commutator is a toothed end face, the fixed frame effectively limits the carbon brush assembly, the carbon brush box protects and guides the carbon brushes, and the toothed end face increases the contact area between the carbon brushes and the commutator, reduces resistance, and thus improves the stability of motor current transmission.

[0005] Preferably, the carbon brush box includes an upper cover and a lower cover. The upper side of the lower cover is provided with multiple buckle plates that pass through the upper cover and bend over. The edge of the upper cover is provided with multiple insertion rods that insert downward into the corresponding insertion slots of the fixing frame. The upper and lower covers facilitate the installation of carbon brushes into the carbon brush box. When the upper cover is installed, the carbon brush box can be inserted and fixed to the fixing frame without the need for screws or other fasteners.

[0006] Preferably, an elastic element is installed inside the carbon brush box at the outer end of the carbon brush. The elastic element can apply a pushing force to the carbon brush towards the commutator, ensuring that there is always a relatively large contact area between the carbon brush and the commutator.

[0007] Preferably, a matching choke coil is installed on one side of the carbon brush assembly on the fixed frame. The choke coil includes a choke core and a coil wound around the outside of the choke core. When alternating current passes through the coil, the choke coil generates an alternating magnetic field in the choke core. This magnetic field will impede the current, thereby reducing the magnitude and fluctuation of the current. At the same time, the choke coil can also absorb and release a large amount of electrical energy, thereby effectively suppressing the fluctuation of current and voltage.

[0008] Preferably, a first bearing is installed between the upper end of the motor spindle and the motor housing, and a second bearing is installed between the lower part of the motor spindle and the fixed frame and valve body. The first and second bearings limit the axial and radial movement of the motor spindle to ensure that the motor spindle rotates stably at high speed.

[0009] Preferably, the top inner side of the motor housing is provided with a bearing mounting groove that matches the first bearing. Multiple radial reinforcing ribs are evenly arranged around the bearing mounting groove on the top of the motor housing. The radial reinforcing ribs are integrally formed with the bearing mounting groove, which increases the strength of the top of the motor housing and also provides limiting support for the first bearing.

[0010] Preferably, the top inner side of the motor housing is provided with a top frame, and the top frame is provided with a plurality of axially extending magnetic tile partition plates around the edge. The magnetic tiles are arranged between adjacent magnetic tile partition plates, and the top frame and magnetic tile partition plates separate and limit the magnetic tiles to prevent the magnetic tiles from falling off.

[0011] Preferably, the magnetic tile separator plate includes a short separator plate and a long separator plate, wherein the short separator plate is provided with a separator spring along the axial direction, and the two sides of the separator spring abut against the magnetic tile.

[0012] Preferably, the outer side of the motor housing is provided with at least one limiting groove that is recessed into the long partition plate for limiting engagement. The limiting groove can prevent the top frame and the long partition plate from shifting.

[0013] Preferably, a waveform pressure plate is installed on the upper part of the motor spindle to axially limit the motor core, and the waveform pressure plate has a vibration damping effect.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By setting the end face of the carbon brush that contacts the commutator as a toothed end face, the contact area between the carbon brush and the commutator can be increased, the resistance can be reduced, thereby improving the stability of motor current transmission and improving the performance of ASU by increasing the stability of current; the fixed frame can effectively limit the carbon brush assembly, and the carbon brush box protects and guides the carbon brush. Attached Figure Description

[0016] Figure 1 This is the main view of the present invention.

[0017] Figure 2 This is a front sectional view of the present invention;

[0018] Figure 3 This is a top sectional view of the present invention;

[0019] Figure 4 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 5 This is a three-dimensional structural diagram of the motor housing of this utility model;

[0021] Figure 6 This is a three-dimensional structural diagram of the carbon brush box of this utility model;

[0022] Figure 7 This is a three-dimensional structural diagram of the choke coil of this utility model;

[0023] Figure 8 This is a three-dimensional structural diagram of the carbon brush of this utility model;

[0024] Figure 9 This is a three-dimensional structural diagram of the separator spring of this utility model.

[0025] Figure label:

[0026] 1. Motor housing; 11. Valve body; 12. Second bearing; 13. Fixed frame; 131. Insertion slot; 14. Elastic element; 15. Waveform pressure plate; 16. Choke coil; 161. Choke core; 162. Coil; 17. Top frame; 18. Long partition plate; 19. Partition spring; 2. Motor spindle; 21. Limiting groove; 22. Cage; 23. Fixing pin; 3. First bearing; 4. Magnet; 5. Carbon brush assembly; 51. Carbon brush; 52. Toothed end face; 6. Motor core; 8. Commutator; 9. Carbon brush box; 91. Top cover; 92. Insertion rod; 93. Bottom cover; 94. Buckle plate; 10. Eccentric wheel; 101. Bearing mounting slot; 102. Connecting hole; 104. Radial reinforcing rib. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] like Figure 1-9 As shown, this utility model provides a solution to address the problems of high resistance and unstable motor current transmission between existing carbon brushes and commutators. The solution is as follows: A motor assembly for a vehicle air suspension supply system includes a motor housing 1 mounted on a valve body 11 of the air suspension supply system. A motor spindle 2 is mounted in the middle of the motor housing 1. A motor core 6 is mounted on the upper part of the motor spindle 2. Magnets 4 are installed between the radially outer side of the motor core 6 and the motor housing 1. A commutator 8 is mounted on the motor spindle 2 below the motor core 6. A fixed frame 13 is installed on the lower side of the commutator 8 to limit its movement in conjunction with the motor housing 1. Several carbon brush assemblies 5 that match the commutator 8 are installed on the upper side of the fixed frame 13. Each carbon brush assembly 5 includes a carbon brush box 9 and carbon brushes 51 disposed in the carbon brush box 9. The end face of the carbon brush 51 that contacts the commutator 8 is a toothed end face 52. The fixed frame 13 can effectively limit the movement of the carbon brush assembly 5. The carbon brush box 9 protects and guides the carbon brushes 51. The toothed end face 52 can increase the contact area between the carbon brushes 51 and the commutator 8, reduce the resistance, and thus improve the stability of the motor current transmission.

[0029] Specifically, an eccentric wheel 10 is connected to the lower end of the motor spindle 2. A fixing pin 23 is installed on the eccentric wheel 10. The fixing pin 23 is connected to the piston arm inside the valve body 11. The piston arm moves back and forth by rotating the motor spindle 2.

[0030] The bottom of the motor housing 1 has multiple connection holes 102 along the edge, through which the entire motor assembly can be securely connected to the valve body 11.

[0031] The toothed end face 52 is evenly distributed with serrated teeth. According to the resistance calculation formula: R = ρL / S, the larger the contact area, the smaller the resistance. Changing the original circular arc contact point to a toothed contact effectively increases the contact area, thereby increasing the contact area with the commutator 8 and reducing the resistance, thus improving the stability of motor current transmission. The carbon brush 51 is used to transmit current and realize the commutation function, and also has auxiliary functions such as reducing arcing and compensating for wear.

[0032] A mounting groove matching the shape of the carbon brush box 9 is provided on the fixed frame 13, and the carbon brush box 9 is embedded and limited in the mounting groove. The motor core 6 is made of silicon steel, which has the characteristics of high magnetic permeability, low coercivity, and high resistivity, thus resulting in low hysteresis loss and eddy current loss. In order to protect the motor core 6, a retainer 22 is installed on the outside of the motor core 6. The shape of the retainer 22 matches the motor core 6, and it is made of PBT-GF30 material, which has excellent mechanical properties and high temperature resistance.

[0033] Magnet 4 can be made of strontium-calcium ferrite, which has high permeability and high magnetization in low-ferromagnetic crystals, providing a superior magnetic field for the motor. The commutator 8 can be made of oxygen-free copper or bakelite powder. The function of the commutator 8 is to change the direction of the current in the armature winding, ensuring that the electromagnetic torque direction is always consistent, thus achieving continuous rotation of the motor. The motor spindle 2 is made of GGr15, a high-carbon chromium bearing steel. With its excellent wear resistance, high contact fatigue strength, and good dimensional stability, it can achieve high and uniform hardness after quenching and low-temperature tempering.

[0034] In this embodiment, as Figure 6 As shown, the carbon brush box 9 includes an upper cover 91 and a lower cover 93. The lower cover 93 has multiple buckle plates 94 that pass through the upper cover 91 and bend. The edge of the upper cover 91 has multiple insertion rods 92 that insert downward into the corresponding insertion slots 131 of the fixed frame 13. The upper cover 91 and the lower cover 93 facilitate the installation of the carbon brush 51 into the carbon brush box 9. While the upper cover 91 is being installed, the carbon brush box 9 can be inserted and fixed to the fixed frame 13 without the need for screws or other fasteners. During installation, the lower cover 93 is first installed into the mounting slot on the fixed frame 13, the carbon brush 51 is placed into the lower cover 93, and then the upper cover 91 is placed on top of the lower cover 93. The insertion rods 92 are then inserted into the insertion slots 131. The insertion slots 131 have multiple barbs, making it difficult for the insertion rods 92 to be pulled out after being inserted into the insertion slots 131. Then, the buckle plates 94 are bent to ensure the secure installation of the upper cover 91.

[0035] In this embodiment, an elastic element 14 is installed inside the carbon brush box 9 at the outer end of the carbon brush 51. The elastic element 14 can apply a pushing force to the carbon brush 51 towards the commutator 8, ensuring that there is always a relatively large contact area between the carbon brush 51 and the commutator 8. The elastic element 14 can be a spring, and a spring guide structure can be provided inside the carbon brush box 9.

[0036] In this embodiment, as Figure 7As shown, a matching choke coil 16 is installed on one side of the carbon brush assembly 5 on the fixed frame 13. The choke coil 16 includes a choke core 161 and a coil 162 wound around the outside of the choke core 161. When alternating current passes through the coil, the choke coil 16 generates an alternating magnetic field in the choke core 161. This magnetic field will impede the current, thereby reducing the magnitude and fluctuation of the current. At the same time, the choke coil can also absorb and release a large amount of electrical energy, thereby effectively suppressing the fluctuation of current and voltage.

[0037] In this embodiment, as Figure 2 As shown, a first bearing 3 is installed between the upper end of the motor spindle 2 and the motor housing 1, and a second bearing 12 is installed between the lower part of the motor spindle 2 and the fixed frame 13 and the valve body 11. The first bearing 3 and the second bearing 12 provide axial and radial limiting for the motor spindle 2, ensuring high-speed and stable rotation of the motor spindle 2. Both the first bearing 3 and the second bearing 12 can be deep groove ball bearings. A bearing mounting groove 101 matching the first bearing 3 is centrally located on the inner top of the motor housing 1. Multiple radial reinforcing ribs 104 are evenly arranged around the bearing mounting groove 101 on the top of the motor housing 1. The radial reinforcing ribs 104 are integrally formed with the bearing mounting groove 101, increasing the strength of the top of the motor housing 1 while also providing limiting support for the first bearing 3.

[0038] In this embodiment, as Figure 2 As shown, a top frame 17 is provided on the inner top of the motor housing 1. The top frame 17 is provided with a plurality of axially extending magnetic tile partition plates around its edge. The magnetic tiles 4 are disposed between adjacent magnetic tile partition plates. The top frame 17 and the magnetic tile partition plates separate and limit the magnetic tiles 4 to prevent them from falling off.

[0039] In this embodiment, the magnetic tile separator includes a short separator and a long separator 18. A separating spring 19 is positioned along the axial direction on the short separator, and the two sides of the separating spring 19 abut against the magnetic tile 4. The outer side of the motor housing 1 is provided with at least one limiting groove 21 that is recessed and embedded in the long separator 18 for limiting engagement. The limiting groove 21 prevents displacement of the top frame 17 and the long separator 18. The separating spring 19 has a W-shaped cross-section, providing elasticity to both sides.

[0040] In this embodiment, a waveform pressure plate 15 for axially limiting the motor core 6 is installed on the upper part of the motor spindle 2. The waveform pressure plate 15 has a vibration damping function. The middle connecting plate of the waveform pressure plate 15 is sleeved on the motor core 6, and the middle connecting plate is connected to the outer ring of the waveform pressure plate 15 through an elastic connecting strip.

[0041] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A motor assembly for a vehicle air suspension supply system, comprising a motor housing (1) mounted on a valve body (11) of the air suspension supply system, wherein a motor spindle (2) is mounted in the middle of the motor housing (1), a motor core (6) is mounted on the upper part of the motor spindle (2), a magnet (4) is mounted between the outer radial side of the motor core (6) and the motor housing (1), a commutator (8) is mounted on the motor spindle (2) below the motor core (6), a fixed frame (13) that cooperates with and limits the movement of the motor housing (1) is mounted on the lower side of the commutator (8), and a plurality of carbon brush assemblies (5) that match the commutator (8) are mounted on the upper side of the fixed frame (13), wherein the carbon brush assembly (5) includes a carbon brush box (9) and carbon brushes (51) disposed in the carbon brush box (9), and the end face of the carbon brush (51) that contacts the commutator (8) is a toothed end face (52).

2. The motor assembly for a vehicle air suspension supply system according to claim 1, characterized in that: The carbon brush box (9) includes an upper cover (91) and a lower cover (93). The lower cover (93) has multiple buckle plates (94) that pass through the upper cover (91) and bend over. The upper cover (91) has multiple plug rods (92) that are inserted downward into the corresponding plug slots (131) of the fixed frame (13) on its edge.

3. The motor assembly for a vehicle air suspension supply system according to claim 2, characterized in that: The carbon brush box (9) has an elastic element (14) installed inside the outer end of the carbon brush (51).

4. The motor assembly for a vehicle air suspension supply system according to claim 1, characterized in that: A matching choke coil (16) is mounted on the fixed frame (13) on one side of the carbon brush assembly (5). The choke coil (16) includes a choke core (161) and a coil (162) wound around the outside of the choke core (161).

5. The motor assembly for a vehicle air suspension supply system according to claim 1, characterized in that: A first bearing (3) is installed between the upper end of the motor spindle (2) and the motor housing (1), and a second bearing (12) is installed between the lower part of the motor spindle (2) and the fixed frame (13) and the valve body (11).

6. The motor assembly for a vehicle air suspension supply system according to claim 5, characterized in that: The motor housing (1) has a bearing mounting groove (101) that matches the first bearing (3) at the center of the inner top. The top of the motor housing (1) is provided with a plurality of radial reinforcing ribs (104) evenly arranged around the bearing mounting groove (101).

7. The motor assembly for a vehicle air suspension supply system according to claim 1, characterized in that: The motor housing (1) has a top frame (17) on its inner top side. The top frame (17) has multiple axially extending magnetic tile partition plates around its edge. The magnetic tiles (4) are arranged between adjacent magnetic tile partition plates.

8. The motor assembly for a vehicle air suspension supply system according to claim 7, characterized in that: The magnetic tile separator includes a short separator and a long separator (18). The short separator is provided with a separator spring (19) along the axial direction. The two sides of the separator spring (19) abut against the magnetic tile (4).

9. The motor assembly for a vehicle air suspension supply system according to claim 8, characterized in that: The outer side of the motor housing (1) is provided with at least one limiting groove (21) that is recessed and embedded in the long partition plate (18) for limiting and matching.

10. The motor assembly for a vehicle air suspension supply system according to any one of claims 1-9, characterized in that: The upper part of the motor spindle (2) is equipped with a wave pressure plate (15) for axially limiting the motor core (6).

Images