阅读说明：本技术 一种水泵差速电磁离合器 (Differential electromagnetic clutch of water pump ) 是由 马国强 马骏 于 2019-09-11 设计创作，主要内容包括：一种水泵差速电磁离合器,其包括驱动总成,从动总成,以及控制总成。所述驱动总成包括带轮,以及旋转盘。所述带轮包括安装筒,以及中间隔板。所述旋转盘包括非磁性安装件,以及铁圈。所述从动总成包括轴承,以及驱动盘。所述驱动盘与所述旋转盘包括永磁组件。所述永磁组件包括永磁盘,以及多组永磁铁组。每一组永磁铁组包括偶数个永磁铁并朝向所述旋转盘设置,两个相邻的永磁铁形成一个磁极回路。所述永磁盘由铁制成并加强所述磁极回路的磁力。本水泵差速电磁离合器可以根据发动机的温度来控制所述从动总成是差速转动还是同速转动,从而可以即时地控制发动机的温度,而让其在最优的温度区间工作,同时,在冷机状态下,由于是差速转动,发动机升温迅速,这将有助于燃料充分燃烧,有效地达到节能减排。(A differential electromagnetic clutch of a water pump comprises a driving assembly, a driven assembly and a control assembly. The drive assembly includes a pulley, and a rotating disk. The belt wheel comprises an installation cylinder and a middle partition plate. The rotating disk comprises a non-magnetic mounting member and an iron ring. The driven assembly includes a bearing, and a drive plate. The drive disk and the rotating disk comprise permanent magnet assemblies. The permanent magnet assembly comprises a permanent magnet disc and a plurality of groups of permanent magnet groups. Each group of permanent magnet groups comprises an even number of permanent magnets and is arranged towards the rotating disk, and two adjacent permanent magnets form a magnetic pole loop. The permanent magnetic disk is made of iron and reinforces the magnetic force of the magnetic pole loop. The water pump differential electromagnetic clutch can control the driven assembly to rotate at a differential speed or at the same speed according to the temperature of the engine, so that the temperature of the engine can be controlled immediately to work in an optimal temperature range, and meanwhile, in a cold state, due to differential rotation, the temperature of the engine is rapidly increased, so that fuel can be fully combusted, and energy conservation and emission reduction are effectively achieved.)

1. The utility model provides a water pump differential electromagnetic clutch which characterized in that: the water pump differential electromagnetic clutch comprises a driving assembly, a driven assembly driven by the driving assembly and a control assembly arranged on the driving assembly, wherein the driving assembly comprises a belt wheel and a rotating disc fixedly arranged on the belt wheel, the belt wheel comprises an installation cylinder and a partition plate arranged in the installation cylinder, the rotating disc comprises a non-magnetic installation part fixedly arranged on the belt wheel and an iron ring arranged in the installation part, the driven assembly comprises a bearing arranged in the belt wheel in a penetrating way and a driving disc fixedly arranged on the bearing, the bearing is arranged in the belt wheel in a sliding way, the driving disc and the rotating disc are positioned on the same side of the partition plate and comprise a permanent magnet component, and a connecting disc connected with the permanent magnet component and fixed on the bearing, the friction disc is connected with the connecting disc, the elastic component is connected between the connecting disc and the friction disc, the permanent magnet component comprises a permanent magnet disc fixedly connected with the connecting disc and a plurality of groups of permanent magnet groups arranged on the permanent magnet disc, each group of permanent magnet groups comprises an even number of permanent magnets and is arranged towards the rotating disc, two adjacent permanent magnets form a magnetic pole loop, the permanent magnet disc is made of iron and strengthens the magnetic force of the magnetic pole loop, the friction disc is sleeved on the bearing, the elastic component comprises at least one elastic sheet clamped between the friction disc and the connecting disc and a connecting piece used for fixing the elastic sheet, the friction disc and the permanent magnet disc, the control assembly comprises a coil arranged on the belt wheel and a controller used for controlling the on-off of the coil, and the coil and the driving disc are positioned on two sides of the partition plate, when the coil is powered off under the control of the controller, the friction disc is separated from the spacing plate under the elastic force of the elastic component, the driven assembly enables the driven assembly and the belt wheel to rotate in a differential speed mode under the action of the driving force generated by the permanent magnet component and the rotating disc, and when the coil is powered on under the control of the controller, magnetic force is generated to enable the friction disc to overcome the elastic force of the elastic component and clamp the spacing plate under the action of the magnetic force generated by the coil, so that the driven assembly and the belt wheel rotate at the same speed.

2. A water pump differential electromagnetic clutch as claimed in claim 1 wherein: the partition plate is provided with a plurality of groove-shaped through holes, and the groove-shaped through holes are used for enabling the magnetic force of the coil to penetrate through the partition plate.

3. A water pump differential electromagnetic clutch as claimed in claim 1 wherein: the belt wheel further comprises a shaft sleeve, and the shaft sleeve and the bearing are arranged at intervals.

4. A water pump differential electromagnetic clutch as claimed in claim 1 wherein: the non-magnetic mounting piece is made of aluminum and comprises at least three ears, the inner side wall of the mounting cylinder of the belt wheel comprises at least three steps, and the three ears are clamped on the three steps respectively.

5. A water pump differential electromagnetic clutch as claimed in claim 1 wherein: the radial width of the iron ring corresponds to the diameter of the permanent magnet, and the center line of the iron ring along the center axis of the bearing coincides with the center line of the permanent magnet along the center axis of the bearing in a cross section along the center axis of the bearing.

6. A water pump differential electromagnetic clutch as claimed in claim 1 wherein: the permanent magnet assembly comprises three groups of permanent magnet groups arranged at intervals, each group of permanent magnet groups comprises four permanent magnets, and the N poles and the S poles of the four permanent magnets are alternately arranged.

7. A water pump differential electromagnetic clutch as claimed in claim 1 wherein: the friction disc has a central through bore spaced from the bearing.

8. A water pump differential electromagnetic clutch as claimed in claim 7 wherein: the elastic sheet is of a V-shaped structure and comprises two free ends and a corner part, the two free ends are fixed on the friction disc, and the corner part is fixedly connected with the connecting disc.

9. A water pump differential electromagnetic clutch as claimed in claim 8 wherein: the corner portion is received in a central through hole of the friction disk.

10. A water pump differential electromagnetic clutch as claimed in claim 1 wherein: when the elastic sheet is in a free state, the friction disc is separated from the contact with the partition plate of the belt wheel.

Technical Field

The invention belongs to the technical field of automobile part equipment, and particularly relates to a differential electromagnetic clutch of a water pump.

Background

The automobile water pump is an important part of an automobile engine cooling system, an engine drives a main shaft and an impeller of the water pump to rotate through a belt pulley, cooling liquid in the water pump is driven by the impeller and thrown to the edge of a water pump shell under the action of centrifugal force, then flows out of a water pipe and is circulated in a reciprocating mode, and therefore the automobile engine is cooled. The water pump differential electromagnetic clutch is sleeved on a main shaft of the water pump and used for controlling the work of the water pump.

Research shows that the engine has the highest efficiency at 83-93 ℃. The engine in the prior art starts the warm-up time for about 20-30 minutes, and the warm-up time of the engine after the technology improvement of the invention is about 10 minutes. The 40% of the time in the normal running process of the automobile does not need a water pump to run at a high speed, and high-speed cooling is needed in the case of climbing or heavy load. In the aspect of automobile emission, the emission of the engine is reduced by about 16% in the temperature range of 83-93 ℃ and the temperature range of no engine. As for the engine, the water temperature inside the engine is equivalent to the body temperature of a person, and the body of the person can be healthy only if the body temperature of the person is normal. Since the body temperature of a person changes and causes a problem, the same applies to an engine, and it is particularly important to maintain the temperature of the engine. Obviously, the water pump with the structural design can not meet the requirement of the variable multi-end working process of the engine, and even can cause excessive cooling in many times, so that the efficiency of the engine is reduced, the engine is damaged, and a large amount of energy is wasted.

Disclosure of Invention

In view of the above, the present invention provides a water pump differential electromagnetic clutch capable of being controlled timely to solve the above problems.

A differential electromagnetic clutch of a water pump comprises a driving assembly, a driven assembly driven by the driving assembly and a control assembly arranged on the driving assembly. The driving assembly comprises a belt wheel and a rotating disk fixedly arranged on the belt wheel. The pulley comprises a mounting cylinder and a partition plate arranged in the mounting cylinder. The rotating disc comprises a non-magnetic mounting part fixedly arranged on the belt wheel and an iron ring arranged in the mounting part. The driven assembly comprises a bearing penetrating through the belt wheel and a driving disc fixedly arranged on the bearing. The bearing is slidably disposed through the pulley. The driving disk and the rotating disk are positioned on the same side of the partition plate and comprise a permanent magnet assembly, a connecting disk, a friction disk and an elastic assembly, wherein the connecting disk is connected with the permanent magnet assembly and fixed on the bearing, the friction disk is connected with the connecting disk, and the elastic assembly is connected between the connecting disk and the friction disk. The permanent magnet assembly comprises a permanent magnet disc fixedly connected with the connecting disc and a plurality of permanent magnet groups arranged on the permanent magnet disc. Each group of permanent magnet groups comprises an even number of permanent magnets and is arranged towards the rotating disk, and two adjacent permanent magnets form a magnetic pole loop. The permanent magnetic disk is made of iron and reinforces the magnetic force of the magnetic pole loop. The friction disc is sleeved on the bearing. The elastic component comprises at least one elastic sheet clamped between the friction disc and the connecting disc and a connecting piece used for fixing the elastic sheet, the friction disc and the permanent magnetic disc. The control assembly comprises a coil arranged on the belt wheel and a controller for controlling the on-off of the coil. The coil and the driving disc are positioned on two sides of the spacing plate. When the coil is powered off under the control of the controller, the friction disc is separated from the spacing plate under the elastic force of the elastic component, and the driven assembly enables the driven assembly and the belt wheel to rotate in a differential speed mode under the action of the driving force generated by the permanent magnet component and the rotating disc. When the coil is electrified under the control of the controller, magnetic force is generated to enable the friction disc to overcome the elastic force of the elastic component and clamp the spacing plate under the action of the magnetic force generated by the coil so as to enable the driven assembly and the belt wheel to rotate at the same speed.

Furthermore, a plurality of groove-shaped through holes are formed in the partition plate, and the groove-shaped through holes are used for enabling the magnetic force of the coil to penetrate through the partition plate.

Further, the belt wheel also comprises a shaft sleeve, and the shaft sleeve and the bearing are arranged at intervals.

Further, the non-magnetic mounting piece is made of aluminum and comprises at least three ears, the inner side wall of the mounting cylinder of the belt wheel comprises at least three steps, and the three ears are clamped on the three steps respectively.

Further, a radial width of the iron ring corresponds to a diameter of the permanent magnet, and a center line of the iron ring along the center axis of the bearing coincides with a center line of the permanent magnet along the center axis of the bearing in a cross section along the center axis of the bearing.

Further, the permanent magnet assembly comprises three groups of permanent magnet groups arranged at intervals, each group of permanent magnet group comprises four permanent magnets, and N poles and S poles of the four permanent magnets are alternately arranged.

Further, the friction disc has a central through hole spaced from the bearing.

Further, the elastic sheet is of a V-shaped structure and comprises two free ends and a corner portion, the two free ends are fixed on the friction disc, and the corner portion is fixedly connected with the connecting disc.

Further, the corner portion is received in a central through hole of the friction disk.

Further, when the elastic sheet is in a free state, the friction disc is separated from contact with the spacing plate of the belt wheel.

Compared with the prior art, the water pump differential electromagnetic clutch provided by the invention is provided with the driven assembly, the driven assembly comprises a permanent magnet component, the permanent magnet component is provided with an iron permanent magnet disc and an even number of permanent magnets arranged on the permanent magnet disc, a magnetic loop formed by the even number of permanent magnets is reinforced by the iron permanent magnet disc, the even number of permanent magnets form a continuous magnetic loop, and sufficient magnetic force is formed under the reinforcement of the iron permanent magnet disc, so that when a rotating disc arranged on a belt wheel rotates, the magnetic line formed by the permanent magnet component is cut, the driven assembly is driven to rotate, but due to the loss of magnetic force energy, and the coil is not electrified, the driven assembly and the driving assembly do differential motion. And when the coil is electrified, the magnetic force generated by the coil enables the friction disc to overcome the elasticity of the elastic component and clamp the spacing plate under the action of the magnetic force generated by the coil, so that the driven assembly is fixedly connected with the belt wheel, and the driven assembly and the belt wheel rotate at the same speed. The differential rotation and the same-speed rotation can be completely controlled by the controller, namely the controller can control the driven assembly to rotate at the differential speed or the same speed according to the temperature of the engine, so that the temperature of the engine can be controlled immediately to work in an optimal temperature range. Meanwhile, in a cold state, due to differential rotation, namely when the engine is cold, the fan rotates slowly, so that the temperature of the engine is increased rapidly, the fuel can be combusted sufficiently, and energy conservation and emission reduction are achieved effectively.

Drawings

Fig. 1 is an exploded structural schematic diagram of a water pump differential electromagnetic clutch provided by the invention.

Fig. 2 is a schematic sectional structure view of the water pump differential electromagnetic clutch of fig. 1.

Fig. 3 is a schematic view showing a pulley of the differential electromagnetic clutch of the water pump of fig. 1.

Detailed Description

Specific examples of the present invention will be described in further detail below. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.

As shown in fig. 1 to 3, the present invention is a structural schematic diagram of a differential electromagnetic clutch of a water pump. The differential electromagnetic clutch of the water pump comprises a driving assembly 10, a driven assembly 20 driven by the driving assembly 10, a control assembly 30 arranged on the driving assembly 10, and a bracket 40 for supporting and arranging the driving assembly 10. It is contemplated that the water pump differential electromagnetic clutch may further include other functional modules, such as a circuit module, a motor module, an assembly module, and a mounting module, etc., which should be well known to those skilled in the art and will not be described in detail herein.

The drive assembly 10 includes a pulley 11 and a rotatable disk 12 fixedly disposed on the pulley 11. The pulley 11 includes a mounting cylinder 111, a partition plate 112 provided in the mounting cylinder 111, and a boss 113 provided on the center of the partition plate 112. The pulley 11 may be made of metal, and is connected to a main shaft (not shown) by a belt and rotates together with the main shaft, so that the pulley 11 rotates the main shaft at the same speed. One side of the installation cylinder 111 is used for arranging a belt placing groove and installing the rotating disc 12, so that the inner side wall of the installation cylinder 111 comprises at least three steps 114, and the structure of the steps 114 will be described in detail below in connection with the rotating disc 12. The partition plate 112 is fixedly connected to the inner wall of the mounting cylinder 111, and a plurality of groove-shaped through holes 115 are formed in the partition plate. The slot-shaped through hole 115 is used for magnetic force to pass through the partition plate 112. The plurality of groove-shaped through holes 115 are concentric circles. The bushing 113 is disposed on the partition 112 and located at one side of the partition 112, and forms an installation groove 116 with the installation cylinder 111. The mounting slot 116 is used to mount the coil 31 of the control assembly 30. The rotary disk 12 is fixedly provided on the pulley 11 and rotates together with the pulley 11. The rotary plate 12 includes a non-magnetic mounting member 121 fixedly disposed on the pulley 11, an iron ring 122 disposed in the mounting member 121, and at least three ears 123 disposed at radial edges of the mounting member 121. The non-magnetic mounting member 121 is made of aluminum, and since it is used not only for mounting the iron ring 122 and the ears 123 but also for heat dissipation, a plurality of heat dissipation fins are provided on the outer side of the mounting member 121. The iron ring 122 is wrapped in the mounting member 121 and has a ring-shaped structure. In the present embodiment, the rotary disk 12 has 6 ears 123. The ears 123 are engaged and received in the three steps 114 to assemble the pulley 11 and the mounting plate 12 together, and the fixing manner may be screw fixing, or may be other fixing manners, such as welding.

The driven assembly 20 includes a bearing 21 inserted into the pulley 11, and a driving disc 22 fixedly disposed on the bearing 21. The bearing 21 is a prior art bearing that is spaced from the sleeve 113 of the pulley 11 so that the pulley 11 and the bearing 113 can rotate at different speeds without interfering with each other. The driving plate 22 is located on the same side of the spacing plate 112 as the rotating plate 12 and includes a permanent magnet assembly 221, a connecting plate 222 connected to the permanent magnet assembly 221 and fixed to the bearing 21, a friction plate 223 connected to the connecting plate 222, and an elastic assembly 224 connected between the connecting plate 222 and the friction plate 223. The permanent magnet assembly 221 includes a permanent magnet plate 2211 fixedly connected to the connection plate 222, and a plurality of permanent magnet groups 2212 disposed on the permanent magnet plate 2211. The permanent magnet disc 2211 is of a circular ring structure and is made of iron. Each group 2212 of permanent magnets comprises an even number of permanent magnets and is arranged facing said rotating disc 12, and two adjacent permanent magnets form a magnetic pole circuit. In this embodiment, the permanent magnet assembly 221 includes three groups of permanent magnet groups 2212 arranged at intervals, each group of permanent magnet groups 2212 includes four permanent magnets, and the N poles and S poles of the four permanent magnets are alternately arranged, so as to form three magnetic pole loops. Since the permanent magnet disc 2211 is made of iron, it can reinforce the magnetic force formed by the permanent magnet and can extend the life of the permanent magnet disc 2211. The magnetic lines of force generated by the permanent magnets are used for cutting when the iron ring 122 rotates to generate power, so as to drive the driven assembly 20 to rotate. For the purpose of cutting magnetic lines of force, the radial width of the iron ring 122 is equivalent to the diameter of the permanent magnet, and the center line of the iron ring 122 along the center axis of the bearing 21 coincides with the center line of the permanent magnet along the center axis of the bearing 21 in the cross section along the center axis of the bearing 21. The connecting plate 222 is used for connecting the friction plate 223 and the permanent magnet assembly 221, and is fixed on the bearing 21, and the fixing mode may be interference fit. The friction disc 223 is of an annular structure to be spaced apart from the bearing 21, and is coupled to the connection plate 222 through the elastic member 224. The friction disc 223 has a central through hole 2231, and the central through hole 2231 is spaced apart from the bearing 21. The elastic component 224 includes at least one elastic sheet 2241 interposed between the friction disc 223 and the connection disc 222, at least one rivet 2242 for fixing the elastic sheet 2241 on the friction disc 223, and a connection member 2243 for connecting the elastic sheet 2241, the connection disc 222 and the permanent magnet disc 2211. In this embodiment, the resilient piece 2241 has a V-shaped structure and includes two free ends and a corner portion. The two free ends are fixed to the friction disc 223 by rivets 2242, and the corner portions are fixedly connected to the connecting disc 222 by bolts 2243. The corner portions are received in the central through hole 2231 of the friction disk 223, so that the connector 2243 can be prevented from interfering with the friction disk 223. When the resilient plate 2241 is in a free state, the friction disc 223 is out of contact with the partition plate of the pulley 11. The connector 2243 may be a bolt.

The control assembly 30 includes a coil 31 provided on the pulley 11, and a controller 32 for controlling the energization and the deenergization of the coil 31. The coil 31 is accommodated in the mounting groove 116, and is formed by winding a conducting wire, and generates a magnetic force after being electrified, and the specific structure and the working principle thereof are the prior art and are not described herein again. The coil 31 and the driving disc 22 are located on both sides of the spacing plate 112. The controller 32 is used to switch the coil 31 on and off, and may be connected to sensors that may be used to monitor the temperature of the engine. I.e. when the temperature of the engine reaches a certain value, the controller 32 passes or de-passes the coil 31.

The carrier 40 is fixed to the engine and comprises a flange 41, and the sleeve 113 of the pulley 11 is fixed to the flange 41, thereby fixing the pulley 11. The bearing 21 is fixed on the engine, so that the whole differential electromagnetic clutch of the water pump is fixed.

It is of course conceivable that the water pump differential electromagnetic clutch also includes other functional modules, such as a fan or the like disposed at the other end of the bearing 21, which is prior art and will not be described in detail herein.

In operation, when the engine is just started, the temperature is low, and the fan does not need to be cooled down by force, at this time, the coil 31 is powered off and does not generate magnetic force under the control of the controller 32, the friction disc 223 is separated from the partition plate 112 under the elastic force of the elastic component 224, the driven assembly 20 and the belt wheel 11 rotate at a differential speed under the action of the driving force generated by the permanent magnet component 21 and the rotating disc 12, and the fan rotates slowly. After the engine works for a period of time, the temperature of the engine rises, and the fan needs to be cooled down by force, when the coil 31 is powered on under the control of the controller 32, magnetic force is generated, so that the friction disc 223 overcomes the elastic force of the elastic component 224 and clamps the partition plate 112 under the action of the magnetic force generated by the coil 31, so that the driven assembly 20 and the pulley 11 rotate at the same speed, and the fan rotates faster, so that the effect of cooling down by force is achieved.

Compared with the prior art, the differential electromagnetic clutch of the water pump provided by the invention has the driven assembly 20, the driven assembly 20 comprises a permanent magnet component 221, the permanent magnet component 221 comprises an iron permanent magnet disc 2211 and an even number of permanent magnets arranged on the permanent magnet disc 2211, a magnetic force loop formed by the even number of permanent magnets is reinforced by the iron permanent magnet disc 2211, the even number of permanent magnets form a continuous magnetic force loop, and under the reinforcement of the iron permanent magnet disc, sufficient magnetic force is formed, so that when the rotating disc 112 arranged on the belt pulley 11 rotates, magnetic force lines formed by the permanent magnet component 221 are cut, the driven assembly 20 is driven to rotate, but due to the loss of magnetic force energy, and the coil 31 is not electrified, the driven assembly 20 and the driving assembly 10 do differential motion. When the coil 31 is energized, the friction disc 223 is driven by the magnetic force generated by the coil 31 to overcome the elastic force of the elastic component 224 and clamp the spacing plate 112 under the action of the magnetic force generated by the coil 31, so that the driven assembly 20 and the pulley 11 are connected and fixed together, and the driven assembly 20 and the pulley 11 rotate at the same speed. The differential rotation and the same-speed rotation can be completely controlled by the controller 32, that is, the controller 32 can control the driven assembly to rotate at the differential speed or the same speed according to the temperature of the engine, so that the temperature of the engine can be controlled immediately to work in an optimal temperature range. Meanwhile, in a cold state, because the fan rotates at a differential speed, namely when the engine is cold, the fan rotates slowly, so that the temperature of the engine is increased rapidly, the engine is favorable for full combustion of fuel, and the purposes of saving energy and reducing emission are effectively achieved

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and any modifications, equivalents or improvements that are within the spirit of the present invention are intended to be covered by the following claims.