CN111262390A - Power supply unit - Google Patents

Abstract

The invention discloses a power supply unit which comprises a motor, a power output shaft and a transmission mechanism, wherein the motor comprises a direct current motor and an alternating current motor, the transmission mechanism comprises a first one-way transmission module and a second one-way transmission module, the first one-way transmission module is connected with the direct current motor and the power output shaft, and the second one-way transmission module is connected with the alternating current motor and the power output shaft. Under the condition that the first one-way transmission module transmits the power of the direct current motor to the power output shaft, the second one-way transmission module disconnects the alternating current motor from the power output shaft; and under the condition that the second one-way transmission module transmits the power of the alternating current motor to the power output shaft, the first one-way transmission module disconnects the direct current motor from the power output shaft. Therefore, the same electric appliance is matched with two motors to supply power to the same execution unit of the electric appliance. The invention omits a common power adapter, improves the operation efficiency of the electric appliance and simplifies the structure of the electric appliance.

Description

a power supply unit

technical field

The invention relates to power supply technology, in particular to a power supply unit with a motor as a main component.

Background technique

Motors, as the main component of power supply units, are widely used in various industries. The power of the motor comes from electrical energy. The general power supply unit is only equipped with one motor, and the power supply mode and performance of such a power supply unit are relatively simple.

For example: electric energy is divided into direct current and alternating current, correspondingly, the motor is divided into direct current motor and alternating current motor.

An electrical appliance equipped with a motor, in order to adapt to direct current and alternating current, needs a matching power adapter, which converts direct current into alternating current and supplies it to the alternating current motor, or converts alternating current into direct current and supplies it to the direct current motor. Electric energy is converted and then supplied to the motor. Obviously, there is no electric energy directly supplied to the motor with high efficiency. Moreover, the electric energy conversion requires an adapter and a supporting power identification system, which undoubtedly increases the complexity of the electrical structure.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is that the same electrical appliance is matched with at least two motors to provide power to the same execution unit of the electrical appliance.

In order to solve the above technical problems, the present invention provides the following technical solutions: a power supply unit, comprising a motor, a power take-off shaft, a transmission mechanism connecting the motor and the power take-off shaft, the number of motors is at least two, and all motors have independent transmission. Modules, all transmission modules constitute the transmission mechanism, and each transmission module is connected with the same power output shaft.

Two or more motors in an electrical appliance provide power to the same execution unit, and different operating effects can be obtained. For example, two motors with different powers provide power to the same execution unit respectively. Such a design can increase the options for the operation of electrical appliances, and one electrical appliance can be used as multiple electrical appliances in the prior art.

As an option, the motor includes a DC motor and an AC motor, the transmission mechanism includes a first one-way transmission module and a second one-way transmission module, and the first one-way transmission module is connected to the DC motor and the power take-off shaft , the second one-way transmission module is connected to the AC motor and the power output shaft.

According to the above technical solution, the external power supply of the electrical appliance or the electrical energy storage unit on the electrical appliance supplies DC power to the DC motor, the DC motor operates, and the power is transmitted to the power output shaft through the first one-way transmission module, and the power output shaft transmits the power to the power output shaft of the electrical appliance. execution unit. The external power supply of the electrical appliance supplies AC power to the AC motor, the AC motor operates, and the power is transmitted to the power output shaft through the second one-way transmission module, and the power output shaft transmits the power to the execution unit of the electrical appliance.

Since the first one-way transmission module and the second one-way transmission module transmit power in one direction, the reverse direction will cause slippage. Therefore, the first one-way transmission module transmits the power of the DC motor. In the case of supplying the power output shaft, the second one-way transmission module can be in the reverse direction of transmission, that is, in a slipping state; and when the second one-way transmission module transmits the power of the AC motor to the power output shaft, the first The one-way drive module can be driven in the opposite direction, that is, slipping. In this way, when the DC motor transmits power to the PTO shaft, the AC motor has no hindering effect on the rotation of the PTO shaft; when the AC motor transmits power to the PTO shaft, the DC motor has no hindering effect on the rotation of the PTO shaft. The two motors can provide power to the same execution unit independently of each other without affecting each other, so that it is possible to provide power to the same execution unit of the electric appliance by matching the two motors with the same electric appliance.

The present invention omits the power adapter commonly used in the prior art, direct current is directly supplied to the direct current motor, and alternating current is directly supplied to the alternating current motor, which improves the operation efficiency of the electrical appliance and simplifies the structure of the electrical appliance.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

Fig. 1 is the schematic diagram of the high pressure washer;

FIG. 2 is a schematic view of the casing 50 in FIG. 1 after being hidden;

Fig. 3 is the plan view of Fig. 2;

FIG. 4 is a cross-sectional view of a power supply unit of the high pressure washer in FIG. 3 .

Description of symbols in the figure:

10. PTO shaft;

20. DC motor; 21. The first one-way bearing; 22. The first driving gear; 23. The first driven gear;

30. AC motor; 31. Second one-way bearing; 32. Second driving gear; 33. Second driven gear;

40. Swashplate axial piston pump; 41. Swashplate;

50. The shell of the high pressure washer.

Detailed ways

3 and 4, a power supply unit includes a motor, a power take-off shaft 10, a transmission mechanism connecting the motor and the power take-off shaft, the motor includes a DC motor 20 and an AC motor 30, and the transmission mechanism includes a first The one-way transmission module and the second one-way transmission module, the first one-way transmission module is connected with the DC motor and the power output shaft, and the second one-way transmission module is connected with the AC motor and the power output shaft.

The external power supply of the electrical appliance or the electrical energy storage unit on the electrical appliance provides DC power to the electrical appliance, and the operator operates the switch to connect the external power supply or electrical energy storage unit with the DC motor 20, the DC motor operates, and the power is transmitted through the first one-way transmission module. To the power take-off shaft 10, the power take-off shaft transmits power to the execution unit of the electrical appliance. At this time, the second one-way transmission module is in a reverse rotation state, the second one-way transmission module slips, and there is no power transmission between the power output shaft 10 and the AC motor 30 .

The external power supply of the electrical appliance provides AC power to the electrical appliance, and the operator operates the switch to connect the external power supply to the AC motor 30, the AC motor operates, and the power is transmitted to the power output shaft 10 through the second one-way transmission module, and the power output shaft transmits the power to the power output shaft 10. Passed to the execution unit of the appliance. At this time, the first one-way transmission module is in a reverse rotation state, the first one-way transmission module slips, and there is no power transmission between the power output shaft 10 and the DC motor 20 .

The switch can be arranged on the electrical appliance housing, and the operator manually selects the corresponding gear according to the power supply situation, and the gear at least includes a DC drive gear and an AC drive gear. In the DC drive mode, an external power source or an electric energy storage unit is connected to the DC motor 20 ; in the AC drive mode, the external power source is connected to the AC motor 30 .

As an option, the one-way transmission direction of the first one-way transmission module is opposite to the one-way transmission direction of the second one-way transmission module. In this way, the parts that play the role of one-way transmission in the first one-way transmission module and The parts that play the role of one-way transmission in the second one-way transmission module are all installed on the power output shaft 10 .

The first one-way transmission module includes a first one-way bearing 21 installed on the power output shaft 10, a first transmission assembly connecting the first one-way bearing and the DC motor 20; the second one-way transmission module includes a A second one-way bearing 31 on the power output shaft, a second transmission assembly connecting the second one-way bearing and the AC motor 30 .

As an option, both the first one-way bearing 21 and the second one-way bearing 31 are single needle roller bearings.

The first transmission assembly and the second transmission assembly may be any mechanism capable of transmitting power.

As an option, the first transmission assembly includes a first driving gear 22 mounted on the DC motor shaft and a first driven gear 23 mounted on the first one-way bearing 21 . The second transmission assembly includes a second driving gear 32 mounted on the AC motor shaft and a second driven gear 33 mounted on the second one-way bearing.

Referring to FIGS. 2 and 3 , as an application of the power supply unit of the present invention, the power output shaft 10 is connected to the swash plate 41 of the swash plate type axial piston pump 40 .

1 to 3 , as a specific application of the above application, the swash plate type axial piston pump 40 is used in a high pressure washer. Accordingly, the power supply unit and the swash plate type axial piston pump 40 are integrated in the In the high-pressure washer, if necessary, the high-pressure washer also integrates a battery pack as an electrical energy storage unit. Since the high-pressure cleaner is portable, the conversion of the battery pack (which is easily exhausted after long-term use) to supply power to the DC motor 20 and the external power supply to supply power to the AC motor 30 has become a normal state.

The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific embodiment and application scope. limits.

Claims (7)

1. A power supply unit, includes motor, power take off (10), connects motor and power take off's drive mechanism, its characterized in that: the number of the motors is at least two, all the motors are respectively provided with independent transmission modules, all the transmission modules form the transmission mechanism, and each transmission module is connected with the same power output shaft.

2. The power supply unit of claim 1, wherein: the motor comprises a direct current motor (20) and an alternating current motor (30).

3. The power supply unit of claim 2, wherein: the transmission mechanism comprises a first one-way transmission module and a second one-way transmission module, the first one-way transmission module is connected with the direct current motor and the power output shaft, and the second one-way transmission module is connected with the alternating current motor and the power output shaft; the unidirectional transmission direction of the first unidirectional transmission module is opposite to the unidirectional transmission direction of the second unidirectional transmission module.

4. The power supply unit of claim 3, wherein: the first one-way transmission module comprises a first one-way bearing (21) arranged on the power output shaft (10) and a first transmission component connected with the first one-way bearing and the direct current motor (20); the second one-way transmission module comprises a second one-way bearing (31) arranged on the power output shaft and a second transmission assembly connected with the second one-way bearing and the alternating current motor (30).

5. The power supply unit of claim 4, wherein: the first transmission assembly comprises a first driving gear (22) arranged on a direct current motor shaft and a first driven gear (23) arranged on a first one-way bearing (21); the second transmission assembly includes a second drive gear (32) mounted on the ac motor shaft and a second driven gear (33) mounted on a second one-way bearing.

6. The power supply unit of claim 1, wherein: the power output shaft (10) is connected with a swash plate (41) of a swash plate type axial plunger pump (40).

7. The power supply unit of claim 6, wherein: the swash plate type axial plunger pump (40) is applied to a high pressure cleaner.

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