Main shaft mechanism of vehicle water pump

Abstract

The utility model belongs to the technical field of automobile water pump accessories, and particularly relates to a main shaft mechanism of an automobile water pump, which comprises a water pump casing, a belt pulley, an upper cover, a main shaft, a planetary gear set and an electromagnet component, the belt pulley is connected onto the water pump casing through a bearing, the upper cover is mounted on the side surface of the belt pulley, and the main shaft is axially mounted in the water pump casing. The planetary gear set is installed between the belt pulley and the upper cover and used for linkage between the belt pulley and the main shaft, and the electromagnet assembly presses the belt pulley and used for connection and disconnection between the belt pulley and the main shaft. The main shaft is decelerated through the planetary gear set, gear transmission is adopted, the main shaft is stable in decelerated rotation and good in stability, meanwhile, the electromagnet assembly is adopted for switching adjustment of high-speed operation and low-speed operation of the main shaft, convenience is good, and the water pumping efficiency of the water pump is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile water pump accessories, in particular to a main shaft mechanism of a vehicle water pump. Background Art

[0002] With the rapid development of the automobile industry and the improvement of people's living standards, automobiles have become an indispensable means of transportation in daily life. In order to meet the operating requirements of automobiles in different environments, on-board water pumps, as a key component, have gradually played an important role in automobile cooling systems, braking systems and other liquid circulation systems.

[0003] To date, internal combustion engines used in mechanical engineering such as automobiles, tractors, ships, generator sets, and construction machinery are all equipped with cooling systems, and these cooling systems are all equipped with water pumps for providing cooling water. However, these water pumps currently all adopt a mechanical drive and a fixed transmission ratio structure; the water pumps work by pumping water according to a fixed connection method and a fixed transmission ratio.

[0004] However, research shows that the engine efficiency is highest when the temperature is 83℃-93℃; the start-up warm-up time of existing engines is usually 20-30 minutes, and the water pump does not need to run at high speed for 60% of the time during normal driving. It only needs to be cooled at high speed when climbing a slope or under heavy load. For example, Chinese patent application No. (CN201510973103.0) discloses an anti-failure speed-regulating electronically controlled water pump. The application uses an electromagnetic coil to adsorb the active disk, so that the water pump follows the high-speed operation of the pulley. At the same time, after the electromagnetic coil releases the adsorption of the active disk, it relies on the adsorption force of the permanent magnet on the friction disk to make a slip rotation, that is, low-speed operation, to improve the energy-saving effect of the automobile engine cooling system. However, under the action of the permanent magnet, the main shaft of the application makes a slip rotation, and the rotation mode is unstable. The water pump impeller has an unstable speed when rotating at a low speed, which greatly affects the water pumping efficiency of the water pump and needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a main shaft mechanism of a vehicle water pump in view of the above-mentioned existing technical problems, so as to achieve the effect of improving the stability of the main shaft when running at low speed and the pumping efficiency of the water pump.

[0006] In view of this, the utility model provides a main shaft mechanism of a vehicle water pump, comprising:

[0007] Water pump housing;

[0008] A pulley connected to the water pump housing via a bearing;

[0009] The upper cover is installed on the side of the pulley away from the water pump housing;

[0010] The main shaft is axially mounted in the water pump housing and a shaft seal is provided between the main shaft and the water pump housing;

[0011] The planetary gear set is installed between the pulley and the upper cover, connected to the end of the main shaft away from the shaft seal, and used for the linkage between the pulley and the main shaft;

[0012] The electromagnet assembly is mounted on the pulley and is used to connect and disconnect the pulley and the main shaft.

[0013] In the above technical solution, further, the planetary gear set includes:

[0014] The gear ring is installed on the inner wall of the upper cover close to the pulley;

[0015] The driven gear is sleeved on the main shaft;

[0016] The planetary gear is installed between the ring gear and the driven gear, and is provided in plurality, and meshes with the ring gear and the driven gear respectively;

[0017] The planet carrier is installed on the side of the driven gear away from the electromagnet assembly and is connected to the planetary gears and the driven gear bearings respectively.

[0018] In the above technical solution, further, the electromagnet assembly includes:

[0019] an electromagnetic coil, mounted on the pulley;

[0020] The pressure plate is sleeved on the main shaft surface and slidably arranged along the main shaft axial direction and is located between the driven gear and the pulley;

[0021] An elastic member is installed between the pressure plate and the pulley and is used to abut the pressure plate against the driven gear;

[0022] Among them, an electromagnetic suction cup is connected to the pulley, and the electromagnetic suction cup is located on the side of the pulley close to the pressure plate, and the pressure plate can be adsorbed by the electromagnetic suction cup after the electromagnetic coil is energized.

[0023] In the above technical solution, further:

[0024] The elastic member is a wave spring sheet.

[0025] In the above technical solution, further:

[0026] The pulley is provided with a coil groove for installing the electromagnetic coil;

[0027] Among them, the electromagnetic coil can adsorb the pressure plate through the pulley and the elastic member.

[0028] In the above technical solution, further:

[0029] The thickness dimensions of the driven gear, the ring gear, and the planetary gear decrease in sequence.

[0030] In the above technical solution, further:

[0031] The main shaft, the pulley, the gear ring and the driven gear are coaxially arranged.

[0032] In the above technical solution, further, it also includes:

[0033] A protrusion is arranged on the inner wall of the upper cover and is located on a side of the gear ring close to the belt pulley;

[0034] Wherein, a groove adapted to the protrusion is provided on the pressure plate to limit the radial rotation of the pressure plate.

[0035] The beneficial effects of the utility model are:

[0036] 1. The connection and disconnection between the pulley and the spindle are realized by using an electromagnet assembly, that is, when the pulley is connected to the spindle, the spindle and the pulley have the same rotation speed, that is, high-speed operation. When the pulley and the spindle are disconnected, the spindle is connected to the pulley by the planetary gear set, and the pulley is the input end of the planetary gear set. Therefore, the spindle as the output end can achieve deceleration operation, that is, low-speed operation;

[0037] 2. At the same time, the gear transmission has good stability and will not cause slip rotation, which improves the pumping efficiency of the water pump when the main shaft runs at low speed;

[0038] 3. And by adjusting the gear ratio of the planetary gear set, it is easy to control the speed of the main shaft when running at low speed;

[0039] 4. The connection between the pulley and the spindle is released by energizing the electromagnetic coil, and the pulley and the spindle are connected when the power is cut off. That is, in the event of a failure of the electromagnetic coil, the spindle runs at high speed, which can effectively ensure driving safety, avoid engine overheating, and provide a buffer period for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a cross-sectional view of the utility model;

[0041] Figure 2 This utility model Figure 1 The enlarged view of point A in the middle;

[0042] The markings in the figure are as follows: 1. water pump housing; 2. pulley; 3. upper cover; 4. main shaft; 5. planetary gear set; 50. ring gear; 51. driven gear; 52. planetary gear; 53. planetary carrier; 6. electromagnet assembly; 60. electromagnetic coil; 61. pressure plate; 62. elastic part; 63. electromagnetic suction cup; 64. coil slot; 7. protrusion; 8. groove. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0044] Embodiment 1:

[0045] This embodiment provides a main shaft mechanism of a vehicle water pump, comprising:

[0046] Water pump housing 1;

[0047] The pulley 2 is connected to the water pump housing 1 by means of a bearing;

[0048] The upper cover 3 is mounted on a side of the pulley 2 away from the water pump housing 1;

[0049] The main shaft 4 is axially mounted in the water pump housing 1, and a shaft seal is provided between the main shaft 4 and the water pump housing 1;

[0050] The planetary gear set 5 is installed between the pulley 2 and the upper cover 3, and is connected to the end of the main shaft 4 away from the shaft seal, and is used for the linkage between the pulley 2 and the main shaft 4;

[0051] The electromagnet assembly 6 is mounted on the pulley 2 and is used to connect and disconnect the pulley 2 and the main shaft 4;

[0052] Among them, a main shaft 4 impeller is also provided at one end of the main shaft 4 away from the planetary gear set 5, the water pump housing 1 is installed in the vehicle cooling system, and the pulley 2 is linked to the engine through a belt, and the electromagnet assembly 6 is connected to the ECU, i.e., an electronic control unit, which is an existing mature technology and is also disclosed in a patent application with application number CN201510973103.0, which will not be repeated here.

[0053] It can be seen from the present embodiment that the connection and disconnection between the pulley 2 and the main shaft 4 are achieved by adopting the electromagnet assembly 6, that is, when the pulley 2 is connected to the main shaft 4, the rotation speed of the main shaft 4 is the same as that of the pulley 2, that is, high-speed operation, and when the pulley 2 is disconnected from the main shaft 4, the main shaft 4 is connected to the pulley 2 by means of the planetary gear set 5, and the pulley 2 serves as the input end of the planetary gear set 5, so the main shaft 4 as the output end can achieve deceleration operation, that is, low-speed operation; and during the deceleration operation, the gear transmission method is adopted, which has high stability, the main shaft 4 rotates smoothly, and there will be no slip rotation, thereby improving the water pumping efficiency of the main shaft 4 when running at a low speed.

[0054] Embodiment 2:

[0055] This embodiment provides a main shaft mechanism of a vehicle water pump, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the planetary gear set 5 includes:

[0056] The gear ring 50 is mounted on the inner wall of the upper cover 3 close to the pulley 2;

[0057] The driven gear 51 is sleeved on the main shaft 4;

[0058] The planetary gears 52 are installed between the ring gear 50 and the driven gear 51, and a plurality of planetary gears 52 are provided, and mesh with the ring gear 50 and the driven gear 51 respectively;

[0059] The planet carrier 53 is installed on the side of the driven gear 51 away from the electromagnet assembly 6 and is connected to the planetary gear 52 and the bearing of the driven gear 51 respectively;

[0060] There may be three planetary gears 52 , which are arranged around the driven gear 51 at equal intervals.

[0061] It can be seen from the present embodiment that by adopting the arrangement of the ring gear 50, the driven gear 51 and the planetary gear 52, the gear ratio of the planetary gear set 5 is adjusted, so that the speed of the main shaft 4 when running at a low speed can be controlled, and the stability of the main shaft 4 when running at a low speed can be further improved, ensuring that there will be no slip rotation, thereby improving the water pumping efficiency of the main shaft 4 when running at a low speed.

[0062] Embodiment 3:

[0063] This embodiment provides a main shaft mechanism of a vehicle water pump, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The electromagnet assembly 6 includes:

[0064] The electromagnetic coil 60 is mounted on the pulley 2;

[0065] The pressure plate 61 is sleeved on the surface of the main shaft 4 and is slidably arranged along the axial direction of the main shaft 4 and is located between the driven gear 51 and the pulley 2;

[0066] The elastic member 62 is installed between the pressure plate 61 and the pulley 2 and is used to make the pressure plate 61 abut against the driven gear 51;

[0067] The pulley 2 is connected with an electromagnetic suction cup 63, and the electromagnetic suction cup 63 is located on the side of the pulley 2 close to the pressure plate 61, and the pressure plate 61 can be adsorbed by the electromagnetic suction cup 63 after the electromagnetic coil 60 is energized;

[0068] The surface of the pressure plate 61 that abuts against the driven gear 51 may also be provided with a friction-increasing layer to improve the connection stability between the pressure plate 61 and the driven gear 51 when the pressure plate 61 abuts against the driven gear 51;

[0069] And the pressure plate 61 is made of a material that can be adsorbed by the electromagnetic chuck 63, such as iron and its iron alloy;

[0070] When the pressure plate 61 is sucked by the electromagnetic suction cup 63, the gap between it and the side surface of the driven gear 51 may be 1-2 mm;

[0071] At the same time, the electromagnetic coil 60 is connected to the ECU and controlled by the ECU. Specifically, when the pulley 2 needs to be connected to the driven gear 51, the ECU controls the electromagnetic coil 60 to be powered on. When the pulley 2 needs to be disconnected from the driven gear 51, the ECU controls the electromagnetic coil 60 to be powered on. The electromagnetic coil 60 is installed and connected to the water pump housing 1, and the installation and connection structure is a prior art and will not be repeated here.

[0072] It can be seen from the present embodiment that the connection and disconnection between the pulley 2 and the driven gear 51 is achieved by turning the electromagnetic coil 60 on and off, so as to facilitate the switching control of the high-speed operation and the low-speed operation of the main shaft 4. Moreover, when the electromagnetic coil 60 is powered off, the main shaft 4 runs at a high speed. That is, when the electromagnetic coil 60 fails, the engine will not overheat due to the low-speed operation of the main shaft 4, thus leaving a buffer period for maintenance and improving driving safety.

[0073] Embodiment 4:

[0074] This embodiment provides a main shaft mechanism of a vehicle water pump, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0075] The elastic member 62 is a wave spring sheet;

[0076] The material of the wave spring piece is a material that is not adsorbed by the electromagnetic coil 60, such as stainless steel, aluminum alloy, etc.

[0077] At the same time, when the electromagnetic coil 60 is adsorbing the pressure plate 61, the wave spring sheet is also in a compressed state, thereby ensuring the abutment effect between the pressure plate 61 and the driven gear 51, ensuring that the pressure plate 61 can directly drive the driven gear 51 to rotate when rotating with the pulley 2, that is, drive the entire planetary gear set 5 to rotate, and there is no need for the planetary gear set 5 to drive.

[0078] It can be seen from this embodiment that the use of a wave spring sheet facilitates installation and uniform force on the circumference, while making the moving distance of the pressure plate 61 when being adsorbed by the electromagnetic coil 60 as small as possible so as not to affect the transmission of the planetary gear set 5.

[0079] Embodiment 5:

[0080] This embodiment provides a main shaft mechanism of a vehicle water pump, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0081] The pulley 2 is provided with a coil groove 64 for installing the electromagnetic coil 60;

[0082] When the electromagnetic coil 60 is energized, the pressure plate 61 can be adsorbed by the electromagnetic suction cup 63 .

[0083] It can be seen from the present embodiment that the opening of the coil slot 64 facilitates the installation of the electromagnetic coil 60, thereby ensuring the adsorption of the pressure plate 61 by the electromagnetic suction cup 63, and facilitating the control of the connection and disconnection between the pressure plate 61 and the driven gear 51, thereby facilitating the control of the connection and disconnection between the pulley 2 and the driven gear 51.

[0084] Embodiment 6:

[0085] This embodiment provides a main shaft mechanism of a vehicle water pump, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0086] The thickness dimensions of the driven gear 51 , the thickness dimensions of the ring gear 50 , and the thickness dimensions of the planetary gears 52 decrease in sequence.

[0087] It can be seen from the present embodiment that the above-mentioned thickness dimension setting facilitates the abutment of the pressure plate 61 against the driven gear 51, thereby preventing the ring gear 50 or the planetary gear 52 from protruding from the side of the driven gear 51 and affecting the abutment of the pressure plate 61 against the driven gear 51, thereby avoiding affecting the connection and release of the pulley 2 and the driven gear 51.

[0088] Embodiment 7:

[0089] This embodiment provides a main shaft mechanism of a vehicle water pump, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0090] The main shaft 4, the pulley 2, the ring gear 50 and the driven gear 51 are coaxially arranged.

[0091] It can be seen from this embodiment that the coaxial arrangement can avoid eccentric rotation, thereby further improving the stability of the main shaft 4 when rotating and the driving main shaft 4 when rotating.

[0092] Embodiment 8:

[0093] This embodiment provides a main shaft mechanism of a vehicle water pump, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including:

[0094] The protrusion 7 is arranged on the inner wall of the upper cover 3 and is located on the side of the gear ring 50 close to the pulley 2;

[0095] The pressure plate 61 is provided with a groove 8 adapted to the protrusion 7, which is used to limit the radial rotation of the pressure plate 61;

[0096] At the same time, the protrusion 7 and the inner wall of the upper cover 3 may be in an integrated structure.

[0097] It can be seen from this embodiment that, by providing the protrusion 7 and the groove 8, it is convenient to radially limit the pressure plate 61, avoid slip rotation, improve the smoothness of the rotation of the main shaft 4, and ensure the stability of the main shaft 4 at high speed.

[0098] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A main shaft mechanism for a vehicle water pump, characterized in that: include: Water pump housing (1); A pulley (2) is connected to the water pump housing (1) via a bearing; An upper cover (3) is mounted on a side of the pulley (2) away from the water pump housing (1); A main shaft (4) is axially mounted in the water pump housing (1), and a shaft seal is provided between the main shaft (4) and the water pump housing (1); A planetary gear set (5) is installed between the pulley (2) and the upper cover (3), and is connected to an end of the main shaft (4) away from the shaft seal, and is used for linkage between the pulley (2) and the main shaft (4); The electromagnet assembly (6) is mounted on the pulley (2) and is used to connect and disconnect the pulley (2) and the main shaft (4).

2. The main shaft mechanism of the vehicle water pump according to claim 1, characterized in that: The planetary gear set (5) comprises: A gear ring (50) is mounted on the inner wall of the upper cover (3) on a side close to the pulley (2); A driven gear (51) sleeved on the main shaft (4); A plurality of planetary gears (52) are installed between the ring gear (50) and the driven gear (51) and mesh with the ring gear (50) and the driven gear (51) respectively; The planet carrier (53) is mounted on a side of the driven gear (51) away from the electromagnet assembly (6), and is respectively connected to the planet gear (52) and the bearing of the driven gear (51).

3. The main shaft mechanism of the vehicle water pump according to claim 2, characterized in that: The electromagnet assembly (6) comprises: An electromagnetic coil (60) is mounted on the pulley (2); A pressure plate (61) is sleeved on the surface of the main shaft (4) and is slidably arranged along the axial direction of the main shaft (4) and is located between the driven gear (51) and the pulley (2); An elastic member (62) is installed between the pressure plate (61) and the pulley (2) and is used to make the pressure plate (61) abut against the driven gear (51); The pulley (2) is connected to an electromagnetic suction cup (63), and the electromagnetic suction cup (63) is located on a side of the pulley (2) close to the pressure plate (61), and the pressure plate (61) can be adsorbed by the electromagnetic suction cup (63) after the electromagnetic coil (60) is energized.

4. The main shaft mechanism of the vehicle water pump according to claim 3, characterized in that: The elastic member (62) is a wave spring sheet.

5. The main shaft mechanism of the vehicle water pump according to claim 3, characterized in that: The pulley (2) is provided with a coil groove (64) for installing the electromagnetic coil (60); When the electromagnetic coil (60) is energized, it can adsorb the pressure plate (61) via the electromagnetic suction cup (63).

6. The main shaft mechanism of the vehicle water pump according to claim 2, characterized in that: The thickness dimensions of the driven gear (51), the thickness dimensions of the ring gear (50), and the thickness dimensions of the planetary gear (52) decrease in sequence.

7. The main shaft mechanism of the vehicle water pump according to claim 2, characterized in that: The main shaft (4), the belt pulley (2), the gear ring (50) and the driven gear (51) are coaxially arranged.

8. The main shaft mechanism of the vehicle water pump according to claim 3, characterized in that: Also includes: A protrusion (7) is arranged on the inner wall of the upper cover (3) and is located on a side of the gear ring (50) close to the pulley (2); The pressure plate (61) is provided with a groove (8) adapted to the protrusion (7) for limiting the radial rotation of the pressure plate (61).

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