Wear-resistant motor for adjusting variable valve lift of engine

Abstract

The utility model discloses a wear-resistant motor for adjusting a variable valve lift of an engine, which belongs to the technical field of motors and comprises a casing, a stator fixed in the casing, a rotor arranged in a middle cavity of the stator, a through hole arranged in the rotor and penetrating through two ends of the rotor, and a rotating shaft fixed in the through hole. The motor is characterized in that one end of the rotating shaft is provided with a first extending section extending out of the shell, worm teeth are arranged on the first extending section, and a hard layer is arranged on the worm teeth. According to the motor, one end of the rotating shaft is provided with the first extension section extending out of the casing, and the worm teeth are arranged on the first extension section, so that the first extension section of the rotating shaft forms the worm, the rotating shaft and the worm are integrated, and the transmission reliability of the worm is enhanced; and meanwhile, the worm teeth are provided with the hard layers, so that the wear resistance of the worm teeth is enhanced, transmission errors caused by wear are reduced, and the precision of valve lift adjustment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a wear-resistant motor for adjusting the lift of a variable valve of an engine. Background Art

[0002] With the implementation of energy conservation, environmental protection and sustainable development, all walks of life have gradually changed their original extensive development model. Engines as power sources are no exception. They are developing towards the goal of high efficiency, low fuel consumption and low emissions. They must have both excellent power and high economic performance. This requires the valve train to achieve the best valve timing according to different working conditions of the engine. Thus, variable valves came into being.

[0003] At present, as described in the invention patent with publication number CN108487960A, most variable valves in the valve train are equipped with a worm gear on the rotating shaft of the motor, so that the motor drives the worm gear as an actuator for lift adjustment. However, in actual applications, it is easy to cause inaccurate execution angles due to wear, so that the engine cannot achieve the ideal valve timing phase, and even shorten the service life of the actuator. Summary of the invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a wear-resistant motor for variable valve lift adjustment of an engine, so that the rotating shaft of the motor and the worm are integrated, and the transmission is more precise; and a hard layer is provided on the worm gear to enhance its wear resistance.

[0005] The technical solution adopted by the utility model to solve its technical problems is: designing a wear-resistant motor for variable valve lift adjustment of an engine, comprising a casing, a stator fixed in the casing, a rotor arranged in the central cavity of the stator, a through hole penetrating through both ends of the rotor, a rotating shaft fixed in the through hole, characterized in that one end of the rotating shaft has a first extending section extending out of the casing, a worm gear is arranged on the first extending section, and a hard layer is arranged on the worm gear.

[0006] Furthermore, the hard layer is a diamond-like coating.

[0007] Furthermore, the thickness of the diamond-like carbon coating is 1 to 4 μm.

[0008] Furthermore, the first extension section is provided with an adjustment mechanism, and the adjustment mechanism can change the meshing angle of the worm gear.

[0009] Furthermore, the adjustment mechanism is an inner hexagonal recessed hole provided on the end wall of the first extension section or an outer hexagonal column head provided on the end of the first extension section.

[0010] Furthermore, the casing is equipped with an end cover, the end cover is provided with a mounting mouth, a first sleeve is fixed in the mounting mouth, one end of the rotating shaft is fitted in the first sleeve, and the other end has a second extending section extending out of the rotor, a second sleeve is fixed in the casing, and the second extending section is fitted in the second sleeve.

[0011] Furthermore, the rotor includes a sleeve and a magnet mounting frame, the sleeve is interference fit on the rotating shaft, a locking groove is provided on the outer wall of the sleeve, and more than two clamping holes are provided on the peripheral wall of the magnet mounting frame, the clamping holes are expanded from the outside to the inside, magnets are clamped in the clamping holes, and there are ribs between two adjacent clamping holes, and the inner wall of the ribs is provided with an insert, which is inserted in the locking groove.

[0012] Furthermore, the stator includes a coil support, the coil support includes a frame, the frame is formed by stacking two or more silicon steel sheets, the frame has a middle cavity running through both ends, and a protective cover is installed on the frame.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Since one end of the rotating shaft has a first extending section extending out of the casing, and a worm tooth is provided on the first extending section, the first extending section of the rotating shaft forms a worm, and the rotating shaft and the worm are integrated, thereby enhancing the reliability of the worm transmission; at the same time, a hard layer is provided on the worm tooth, which enhances the wear resistance of the worm tooth and reduces the transmission error caused by wear, thereby improving the accuracy of valve lift adjustment.

[0015] 2. Because the diamond-like coating has an ultra-low friction coefficient, it has good lubricity and can reduce wear to a greater extent.

[0016] 3. Since the first extension section is provided with an adjustment mechanism, the adjustment mechanism can change the meshing angle of the worm gear, which is convenient for adjusting the meshing angle of the worm gear, increasing the contact surface of the meshing transmission, and is conducive to enhancing the transmission strength and torque.

[0017] 4. Since the adjustment mechanism adopts the structure of inner hexagonal concave hole or outer hexagonal column head, it is not only simple in structure, but also mature in technology, cost-effective and easy to implement.

[0018] 5. Since the rotating shaft is installed in the first sleeve and the second sleeve located at both ends of the rotor, the rotating shaft can be stably supported, and the stability of the rotating shaft rotation is enhanced. It can not only transmit more accurately, but also facilitate the maintenance of the motor and extend the service life of the motor itself.

[0019] 6. Since the rotor adopts a structure in which the sleeve is installed on the rotating shaft with interference fit and the magnet is installed on the sleeve, it not only realizes the stable installation of the rotating shaft and the magnet on the sleeve, but also simplifies the rotor structure, which is conducive to enhancing its stability.

[0020] 7. Since a frame composed of two or more stacked silicon steel sheets is provided in the coil support, the magnetic permeability of the coil support is improved, which helps to improve the working efficiency of the motor. The protective cover installed on the frame is used to protect the frame to avoid damage caused by external force.

[0021] 8. The utility model is cleverly designed. The worm and the shaft are designed as one piece and a hard layer is provided on the worm teeth to improve the wear resistance. It can extend the service life while improving the transmission accuracy. It is worthy of promotion and use in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded structural diagram of the utility model;

[0023] Figure 2 yes Figure 1 A-direction view;

[0024] Figure 3 yes Figure 2 Middle BB section view;

[0025] Figure 4 yes Figure 3 Enlarged cross-sectional view of the middle CC;

[0026] Figure 5 for Figure 3 Enlarged view of detail I in the figure.

[0027] The markings in the figure are: 1. casing; 2. shaft; 3. magnet mounting frame; 4. magnet; 5. end cover; 6. worm gear; 7. hexagon socket hole; 8. first sleeve; 9. mounting nozzle; 10. sleeve; 11. silicon steel sheet; 12. middle cavity; 13. protective sleeve; 14. second sleeve; 15. rib; 16. insert; 17. diamond-like coating; 18. first extension section; 19. second extension section. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] The utility model defines the side close to the axis of the rotating shaft 2 as the inner side, and correspondingly defines the other side away from the axis of the rotating shaft 2 as the outer side.

[0030] like Figure 3As shown, the utility model has a stator fixed in the housing 1. Specifically, a coil support is provided in the stator, wherein a frame is provided in the coil support. The frame is formed by stacking eleven silicon steel sheets 11, which can improve the magnetic permeability of the coil support and help improve the working efficiency of the motor. A middle hole is provided in the silicon steel sheet 11, so that the frame has a middle cavity 12 that passes through both ends. The middle cavity 12 is the middle cavity 12 of the stator. A protective cover 13 made of plastic material is installed on the frame. The protective cover 13 is used to protect the frame to avoid damage caused by external forces, which is beneficial to extend the service life of the frame. A rotor is provided in the middle cavity 12 of the stator. A through hole is provided in the rotor that passes through both ends of the rotor. A rotating shaft 2 is fixed in the through hole. Specifically, as shown in FIG. Figure 4 As shown. A sleeve 10 and a magnet mounting frame 3 are provided in the rotor. The sleeve 10 is interference-fitted on the rotating shaft 2. A locking groove is provided on the outer wall of the sleeve 10. Two or more clamping holes are provided on the peripheral wall of the magnet mounting frame 3. The clamping holes are expanded from the outside to the inside. Magnets 4 are clamped in the clamping holes. There are ribs 15 between two adjacent clamping holes. The inner wall of the ribs 15 is provided with inserts 16. The inserts 16 are inserted into the locking groove. One end of the rotating shaft 2 has a first extension section 18 extending out of the housing 1. The first extension section 18 has a worm gear 6, as shown in FIG. Figure 5 As shown, a diamond-like coating 17 is provided on the worm gear 6, and the thickness of the diamond-like coating 17 is 1-4 μm, specifically 1 μm, 2 μm, 3 μm or 4 μm, or any other value as long as it is within the range of 1-4 μm.

[0031] In order to facilitate the adjustment of the meshing angle of the worm gear 6, Figure 1 and Figure 2 As shown, the utility model is also provided with an adjustment mechanism on the first extension section 18. Specifically, a hexagonal recessed hole 7 is provided on the end wall of the first extension section 18. During installation, the rotating shaft 2 and the rotor can be rotated by a hexagonal wrench according to the position and angle of the worm gear, so that the worm gear 6 of the first extension section 18 is fully meshed with the turbine. The adjustment mechanism can also be an external hexagonal column head provided at the end of the first extension section 18, or other rotation adjustment mechanism. As long as the meshing angle of the worm gear 6 can be changed by rotation, no specific requirements are made on its structure.

[0032] In order to facilitate the installation operation of the rotor and the stator and enhance the stability of the rotation of the shaft 2, the utility model is also equipped with an end cover 5 on the casing 1, and a mounting mouth 9 is provided on the end cover 5. A first sleeve 8 is fixed in the mounting mouth 9. One end of the shaft 2 is equipped in the first sleeve 8, and the other end has a second extension section 19 extending out of the rotor. A second sleeve 14 is fixed in the casing 1, and the second extension section 19 is equipped in the second sleeve 14. In this way, the shaft 2 is equipped in the first sleeve 8 and the second sleeve 14 located at both ends of the rotor, so that the shaft 2 can be stably supported, and the stability of the rotation of the shaft 2 is enhanced. Not only can the transmission be more precise, but it is also beneficial to maintain the motor and extend the service life of the motor itself.

[0033] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model.

Claims

1. A wear-resistant motor for variable valve lift adjustment of an engine, comprising a housing, a stator fixed in the housing, a rotor arranged in the middle cavity of the stator, a through hole penetrating through both ends of the rotor, a rotating shaft fixed in the through hole, characterized in that: One end of the rotating shaft is provided with a first extension section extending out of the housing, the first extension section is provided with a worm gear, and the worm gear is provided with a hard layer.

2. The wear-resistant motor for adjusting the variable valve lift of an engine according to claim 1, characterized in that: The hard layer is a diamond-like coating.

3. The wear-resistant motor for variable valve lift adjustment of an engine according to claim 2, characterized in that: The thickness of the diamond-like carbon coating is 1 to 4 μm.

4. The wear-resistant motor for variable valve lift adjustment of an engine according to claim 1, characterized in that: The first extension section is provided with an adjustment mechanism, and the adjustment mechanism can change the meshing angle of the worm gear.

5. The wear-resistant motor for adjusting the variable valve lift of an engine according to claim 4, characterized in that: The adjustment mechanism is an inner hexagonal recessed hole provided on the end wall of the first extension section or an outer hexagonal column head provided at the end of the first extension section.

6. The wear-resistant motor for adjusting the variable valve lift of an engine according to claim 5, characterized in that: The casing is equipped with an end cover, which is provided with a mounting mouth, in which a first sleeve is fixed, one end of the rotating shaft is fitted in the first sleeve, and the other end has a second extension section extending out of the rotor, a second sleeve is fixed in the casing, and the second extension section is fitted in the second sleeve.

7. The wear-resistant motor for variable valve lift adjustment of an engine according to any one of claims 1 to 6, characterized in that: The rotor comprises a sleeve and a magnet mounting frame. The sleeve is interference-fitted on the rotating shaft. A locking groove is provided on the outer wall of the sleeve. Two or more clamping holes are provided on the peripheral wall of the magnet mounting frame. The clamping holes are expanded from the outside to the inside. Magnets are clamped in the clamping holes. A rib is provided between two adjacent clamping holes. An insert is provided on the inner wall of the rib. The insert is inserted in the locking groove.

8. The wear-resistant motor for variable valve lift adjustment of an engine according to any one of claims 1 to 6, characterized in that: The stator comprises a coil support, the coil support comprises a frame, the frame is formed by stacking two or more silicon steel sheets, the frame has a middle cavity passing through both ends, and a protective cover is installed on the frame.

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