Electrically controlled water pump switch pulley

Abstract

The application relates to the technical field of pulleys, in particular to an electric control water pump switch pulley, wherein the water pump comprises a pump body and a rotating shaft arranged at one end of the pump body, the pulley comprises a pulley body and a mandrel sleeved in the pulley body, a clutch mechanism is arranged between the pulley body and the mandrel, and the mandrel is arranged on the rotating shaft. When the electric control water pump switch pulley is used, the clutch roller is driven to displace in the cam groove through a control mechanism, the clutch mechanism is combined or separated, the pulley body is connected to the mandrel or the power is cut off, the use requirement of the water pump is met, the water pump can be started or stopped at any time, and the use rate of the water pump is improved.

Description

Technical Field

[0001] This invention relates to the field of belt pulley technology, and in particular to an electrically controlled water pump switch belt pulley. Background Technology

[0002] Inside the engine block of a car, there are multiple water channels for cooling water circulation. These channels are connected to the radiator (commonly known as the water tank) located at the front of the car via water pipes, forming a large water circulation system. A water pump is installed at the upper outlet of the engine, driven by a fan belt, to pump hot water out of the engine block's water channels and pump cold water in. Next to the water pump is a thermostat. When the car is first started (cold engine), it does not open, allowing the coolant to circulate only within the engine, bypassing the water tank (commonly known as the small circulation). Once the engine temperature reaches above 95 degrees Celsius, it opens, pumping the hot water from the engine into the water tank. The cool air from the car as it moves forward blows across the water tank, carrying away the heat.

[0003] The existing water pump pulley cannot interrupt torque as needed, and it rotates continuously along with the water pump, which cannot meet the requirements of some applications, reduces the application range of the pulley, and reduces the utilization rate of the pulley. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the existing water pump pulley cannot interrupt torque as needed, and rotates continuously as the pulley rotates, which cannot meet the usage requirements of some occasions, reduces the application range of the pulley and reduces the utilization rate of the pulley, the present invention provides an electrically controlled water pump switch pulley.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an electrically controlled water pump switch pulley, wherein the water pump includes a pump body and a rotating shaft disposed at one end of the pump body, the pulley includes a pulley body and a spindle sleeved in the pulley body, a clutch mechanism is provided between the pulley body and the spindle, and the spindle is disposed on the rotating shaft;

[0006] The clutch mechanism includes a plurality of clutch rollers for transmitting torque and a cage. The cage is disposed between the pulley body and the spindle. The cage has a plurality of windows along its circular shape, and the clutch rollers are disposed in the corresponding windows. The spindle is provided with cam grooves corresponding to the clutch rollers, and the clutch rollers are disposed in the corresponding cam grooves. A control mechanism is provided between the pump body and the clutch mechanism for controlling the displacement of the clutch rollers in the cam grooves, thereby enabling the pulley body to transmit or cut off power to the spindle.

[0007] This invention uses a control mechanism to move the clutch roller within the cam groove, causing the clutch mechanism to engage or disengage. This enables the pulley to transmit or cut off power to the spindle, meeting the requirements of water pump operation, allowing the water pump to be started or stopped at any time, and improving the utilization rate of the water pump.

[0008] To further implement the control mechanism, the control mechanism includes an electromagnet and an armature mounted on the pump body. The armature is circumferentially limited on the spindle. A rotating mechanism for controlling the rotation of the retainer is provided between the retainer and the armature, which drives the clutch roller to move within the cam groove, thereby achieving the engagement or disengagement of the clutch mechanism. By energizing or de-energizing the electromagnet mounted on the pump body, the displacement of the armature on the spindle is controlled, and the rotating mechanism drives the retainer to rotate, causing the clutch roller to move within the cam groove, thereby achieving the engagement or disengagement of the clutch mechanism.

[0009] To further realize the rotating mechanism, the rotating mechanism includes a slot on the armature, the long axis of the slot being intersected with the central axis of the spindle, a pin corresponding to the slot being provided on the cage, and a first spring assembly being provided between the armature and the spindle. When the electromagnet is energized, the armature is attracted to the electromagnet, and the slot and the pin are disengaged, realizing the separation of the clutch mechanism. When the electromagnet is de-energized, the armature is forced to displace on the spindle under the force of the first spring assembly, while the pin is locked into the slot and drives the cage to rotate, which in turn causes the second spring assembly to drive the clutch roller to displace in the cam groove, realizing the engagement of the clutch mechanism. When the electromagnet is energized, the armature is displaced on the spindle, causing the pin to gradually disengage from the slot and rotate the cage. The cage then moves the clutch roller within the cam groove, disengaging the clutch mechanism and cutting off the power transmission between the pulley and the spindle. When the electromagnet is de-energized, the armature displaces on the spindle under the force of the first spring assembly, causing the pin to gradually enter the slot. This rotates the cage, which in turn moves the centrifugal roller within the cam groove, engaging the clutch mechanism and allowing the pulley to transmit power to the spindle.

[0010] Furthermore, the first spring assembly is a wave spring.

[0011] To achieve circumferential positioning of the armature on the mandrel, the mandrel is further provided with a protrusion along its axial direction, and the armature has a slide rail that matches the mandrel. The mandrel is disposed within the slide rail, and the inner circumferential wall of the slide rail has a guide groove that matches the protrusion along its axial direction. The protrusion is slidably disposed within the guide groove. By cooperating with the guide groove on the armature, the circumferential positioning of the armature on the mandrel is achieved.

[0012] To better facilitate the displacement of the clutch roller within the cage, a second spring assembly corresponding to the clutch roller is further provided on the cage. In the initial state, this second spring assembly pushes the clutch roller towards the larger end of the cam groove, bringing the clutch roller to the critical state of engagement and disengagement. This is achieved by providing a second spring assembly on the cage.

[0013] To further realize the second spring assembly, the second spring assembly includes a first spring plate and a second spring plate, which are fixed on a cage and are disposed opposite to each other on both sides of the clutch roller. By arranging the first spring plate and the second spring plate on the cage and distributing the clutch roller between the first spring plate and the second spring plate, better control of the clutch roller's displacement within the cam groove is achieved.

[0014] To better control the displacement of the clutch roller within the cam groove, both the first and second springs are in contact with the clutch roller in the initial state. By placing the clutch roller in a critical state of engagement and disengagement in the initial state, the cage can better control the displacement of the clutch roller within the cam groove.

[0015] Furthermore, the clutch mechanism also includes a plurality of support rollers, which are disposed within windows on the cage and located between the clutch rollers.

[0016] Furthermore, the cam groove includes a connecting section, a transition section, and a separating section. The connecting section has a first arc-shaped structure, and the separating section has a second arc-shaped structure. The connecting section and the separating section are disposed opposite to each other at both ends of the transition section. The transition section is an inclined surface, with the connecting section located at the high end of the inclined surface and the separating section located at the low end of the inclined surface.

[0017] The beneficial effects of this invention are as follows: When the electronically controlled water pump switch pulley of this invention is in use, the control mechanism drives the clutch roller to move within the cam groove, causing the clutch mechanism to engage or disengage, thereby transmitting or cutting off power from the pulley to the spindle, meeting the usage requirements of the water pump, allowing the water pump to be started or stopped at any time, improving the utilization rate of the water pump, and avoiding the problem that existing water pump pulleys cannot interrupt torque as needed, and rotate continuously along with the pulley, which cannot meet the usage requirements of some occasions, reducing the application range of the pulley and reducing the utilization rate of the pulley. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is the front view of the present invention;

[0020] Figure 2 yes Figure 1Sectional view of AA;

[0021] Figure 3 yes Figure 1 BB section view;

[0022] Figure 4 yes Figure 1 CC section view;

[0023] Figure 5 yes Figure 2 A magnified view of part D;

[0024] Figure 6 yes Figure 4 A magnified view of part E in the image;

[0025] Figure 7 This is a schematic diagram of the installation structure of the armature and clutch mechanism in this invention;

[0026] Figure 8 yes Figure 7 A magnified view of part of F;

[0027] Figure 9 This is a schematic diagram of the armature mounting structure in this invention.

[0028] In the diagram: 1. Pump body, 2. Shaft, 3. Pulley body, 4. Spindle, 5. Clutch roller, 6. Cage, 7. Window, 8. Cam groove, 9. Electromagnet, 10. Armature, 11. Groove, 12. Pin, 13. First spring assembly, 14. Protrusion, 15. Guide groove, 16. Second spring assembly, 17. First spring piece, 18. Second spring piece, 19. Support roller, 20. Engagement section, 21. Transition section, 22. Separation section. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the embodiments:

[0030] This invention is not limited to the specific embodiments listed below. Those skilled in the art can implement this invention using various other specific embodiments based on the content disclosed herein. Any modifications or alterations made to the design structure and concept of this invention fall within the protection scope of this invention. It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] like Figure 1-9 As shown, an electrically controlled water pump switch pulley is provided. The water pump includes a pump body 1 and a rotating shaft 2 disposed at one end of the pump body 1. The pulley includes a pulley body 3 and a spindle 4 sleeved in the pulley body 3. A clutch mechanism is provided between the pulley body 3 and the spindle 4. The spindle 4 is disposed on the rotating shaft 2.

[0034] The clutch mechanism includes a plurality of clutch rollers 5 for transmitting torque and a retainer 6. The retainer 6 is disposed between the pulley body 3 and the spindle 4. The retainer 6 has a plurality of windows 7 opened along its circular edge. The plurality of clutch rollers 5 are disposed in the corresponding windows 7. The spindle 4 is provided with cam grooves 8 corresponding to the clutch rollers 5. The clutch rollers 5 are disposed in the corresponding cam grooves 8. A control mechanism is provided between the pump body 1 and the clutch mechanism for controlling the displacement of the clutch rollers 5 in the cam grooves 8, thereby realizing the transmission or disconnection of power from the pulley body 3 to the spindle 4.

[0035] The control mechanism includes an electromagnet 9 and an armature 10 mounted on the pump body 1. The armature 10 is circumferentially limited on the spindle 4. A rotating mechanism for controlling the rotation of the retainer 6 is provided between the retainer 6 and the armature 10, which drives the clutch roller 5 to move within the cam groove 8, thereby realizing the engagement or disengagement of the clutch mechanism.

[0036] The rotating mechanism includes a slot 11 on the armature 10, the long axis of the slot 11 being intersected with the central axis of the spindle 4. A pin 12 corresponding to the slot 11 is provided on the retainer 6. A first spring assembly 13 is provided between the armature 10 and the spindle 4. When the electromagnet 9 is energized, the armature 10 is attracted to the electromagnet 9, and the slot 11 and the pin 12 are disengaged, realizing the separation of the clutch mechanism. When the electromagnet 9 is de-energized, the armature 10 is forced to move on the spindle 4 under the force of the first spring assembly 13, and at the same time, the pin 12 is locked in the slot 11 and drives the retainer 6 to rotate, which causes the second spring assembly 16 to drive the clutch roller 5 to move in the cam groove 8, realizing the engagement of the clutch mechanism.

[0037] The first spring assembly 13 is a wave spring.

[0038] The mandrel 4 has a protrusion 14 along its axial direction. The armature 10 has a slide rail that matches the mandrel 4. The mandrel 4 is disposed in the slide rail. The inner peripheral wall of the slide rail has a guide groove 15 that matches the protrusion 14 along its axial direction. The protrusion 14 is slidably disposed in the guide groove 15.

[0039] The retainer 6 is provided with a second spring assembly 16 corresponding to the clutch roller 5. In the initial state, the second spring assembly 16 is used to push the clutch roller 5 towards the large end of the cam groove 8 and realize that the clutch roller 5 is in the critical state of engagement and disengagement.

[0040] The second spring assembly 16 includes a first spring piece 17 and a second spring piece 18, which are fixed on the retainer 6. The first spring piece 17 and the second spring piece 18 are arranged opposite to each other and located on both sides of the clutch roller 5.

[0041] In the initial state, both the first spring 17 and the second spring 18 are in contact with the clutch roller 5.

[0042] The clutch mechanism also includes a plurality of support rollers 19, which are disposed within windows 7 on the retainer 6 and located between clutch rollers 5.

[0043] The cam groove 8 includes a connecting section 20, a transition section 21, and a separating section 22. The connecting section 20 has a first arc-shaped structure, and the separating section 22 has a second arc-shaped structure. The connecting section 20 and the separating section 22 are disposed opposite to each other at the two ends of the transition section 21. The transition section 21 is an inclined surface, with the connecting section 20 located at the high end of the inclined surface and the separating section 22 located at the low end. Here, the larger end of the cam groove 8 refers to the separating section 22, and the smaller end of the camshaft refers to the connecting section 20.

[0044] When the above-mentioned electric water pump switch pulley is in use, the water pump is turned on, the electromagnet 9 is de-energized, and the armature 10 is displaced away from the electromagnet 9 under the action of the wave spring of the first spring assembly 13. The guide groove 15 slides relative to the protrusion 14. At the same time, the pin 12 on the retainer 6 gradually enters the slot 11 on the armature 10 and drives the retainer 6 to rotate. The first spring piece 17 in the second spring assembly 16 on the retainer 6 displaces the clutch roller 5 from the large end to the small end of the cam groove 8 and engages it, realizing the engagement of the clutch mechanism. This allows the pulley body 3 to transmit power to the spindle 4 through the clutch mechanism, and the spindle 4 then transmits it to the rotating shaft 2 of the pump body 1.

[0045] When the electromagnet 9 is energized, it attracts the armature 10, which moves on the spindle 4. At the same time, the guide groove 15 moves relative to the protrusion 14, causing the armature 10 to press the wave spring at the first spring assembly 13. The guide groove 15 moves relative to the protrusion 14, and the pin 12 gradually disengages from the slot 11 and drives the cage 6 to rotate. The second spring 18 on the cage 6 drives the clutch roller 5 to move in the large end direction in the cam groove 8 and separate, realizing the separation of the clutch mechanism. This also blocks the power of the pulley 3 through the clutch mechanism, and no torque is transmitted to the rotating shaft 2 of the pump body 1.

[0046] The above description, based on the preferred embodiments of the present invention, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. An electrically controlled water pump switch pulley, the water pump comprising a pump body (1) and a rotating shaft (2) disposed at one end of the pump body (1), characterized in that: The pulley includes a pulley body (3) and a spindle (4) sleeved inside the pulley body (3). A clutch mechanism is provided between the pulley body (3) and the spindle (4). The spindle (4) is mounted on the rotating shaft (2). The clutch mechanism includes a plurality of clutch rollers (5) for transmitting torque and a retainer (6). The retainer (6) is disposed between the pulley body (3) and the spindle (4). The retainer (6) has a plurality of windows (7) along its circumference. The plurality of clutch rollers (5) are disposed in the corresponding windows (7). The spindle (4) is provided with cam grooves (8) corresponding to the clutch rollers (5). The clutch rollers (5) are disposed in the corresponding cam grooves (8). A control mechanism for controlling the displacement of the clutch rollers (5) in the cam grooves (8) is provided between the pump body (1) and the clutch mechanism, so as to realize the transmission or disconnection of power from the pulley body (3) to the spindle (4). The control mechanism includes an electromagnet (9) and an armature (10) mounted on the pump body (1). The armature (10) is circumferentially limited on the spindle (4). A rotating mechanism for controlling the rotation of the retainer (6) is provided between the retainer (6) and the armature (10), which drives the clutch roller (5) to move in the cam groove (8), thereby realizing the engagement or disengagement of the clutch mechanism. The rotating mechanism includes a slot (11) on the armature (10), the long axis of the slot (11) and the central axis of the spindle (4) are intersected. The retainer (6) is provided with a pin (12) corresponding to the slot (11). A first spring assembly (13) is provided between the armature (10) and the spindle (4). When the electromagnet (9) is energized, the armature (10) is attracted to the electromagnet (9), and the slot (11) and the pin (12) are disengaged, realizing the separation of the clutch mechanism. When the electromagnet (9) is de-energized, the armature (10) is forced to move on the spindle (4) under the force of the first spring assembly (13), and at the same time, the pin (12) is locked in the slot (11) and drives the retainer (6) to rotate, which causes the second spring assembly (16) to drive the clutch roller (5) to move in the cam groove (8), realizing the engagement of the clutch mechanism. The cage (6) is provided with a second spring assembly (16) corresponding to the clutch roller (5). In the initial state, the second spring assembly (16) is used to push the clutch roller (5) towards the large end of the cam groove (8) and realize that the clutch roller (5) is in the critical state of engagement and disengagement.

2. The electrically controlled water pump switch pulley according to claim 1, characterized in that: The first spring assembly (13) is a wave spring.

3. The electrically controlled water pump switch pulley according to any one of claims 1-2, characterized in that: The mandrel (4) has a protrusion (14) along its axial direction. The armature (10) has a slide rail that matches the mandrel (4). The mandrel (4) is located in the slide rail. The inner circumferential wall of the slide rail has a guide groove (15) that matches the protrusion (14) along its axial direction. The protrusion (14) is slidably located in the guide groove (15).

4. The electrically controlled water pump switch pulley according to claim 1, characterized in that: The second spring assembly (16) includes a first spring plate (17) and a second spring plate (18), which are fixed on the cage (6) and are arranged opposite to each other and located on both sides of the clutch roller (5).

5. The electrically controlled water pump switch pulley according to claim 4, characterized in that: In the initial state, both the first spring (17) and the second spring (18) are in contact with the clutch roller (5).

6. The electrically controlled water pump switch pulley according to claim 1, characterized in that: The clutch mechanism also includes a plurality of support rollers (19), which are disposed in windows (7) on the cage (6) and located between the clutch rollers (5).

7. The electrically controlled water pump switch pulley according to claim 1, characterized in that: The cam groove (8) includes a connecting section (20), a transition section (21) and a separating section (22). The connecting section (20) is a first arc-shaped structure, and the separating section (22) is a second arc-shaped structure. The connecting section (20) and the separating section (22) are arranged opposite to each other at both ends of the transition section (21). The transition section (21) is an inclined surface. The connecting section (20) is located at the high end of the inclined surface, and the separating section (22) is located at the low end of the inclined surface.

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