JP3015115U - Power unit case structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a case structure of a power unit in which the layout of the switch operation surface (front surface or upper surface) can be changed while reducing noise and improving waterproofness. [Structure] A lower case portion 10 that covers the oil tank 1, an upper case portion 20 that covers the pump 2 and the electric motor 3, a switch accommodating recess 23 that is open over the front surface and the upper surface of the upper case portion 20, and a fixed side cover. An operation member 8 which is rotatable with respect to the portion 60 and the fixed side cover portion 60 and which is used for operating a switch.
A cover part 50 including an opening / closing door part 70 having 0, and the fixed side cover part 60 includes the upper case part 20.
It can be attached to both the upper surface and the front surface, and the opening / closing door portion 70 serving as a switch operation surface can be arranged on either the front surface side or the upper surface side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a case structure of a power unit used as a hydraulic power source for various hydraulic devices mounted on a vehicle such as a truck.

[0002]

[Prior art]

 Generally, a power unit is an oil tank, a pump, and an electric motor for driving the pump that are integrated, and can be widely used as a hydraulic power source for hydraulic equipment mounted on a vehicle because the vehicle battery can be used as a power source. Has been done.

[0003]

[Problems to be solved by the device]

 By the way, in the conventional power unit, the pump portion was housed inside the cylindrical oil tank, but the electric motor driving the pump was exposed outside the oil tank. For this reason, there is a fear that the rotation noise of the electric motor is emitted as it is during the operation. In the case of freight cars, etc., there are many cases in which the lifting device for roofing and the roof opening / closing device are operated at midnight, and there is a demand to reduce noise during operation. Therefore, for the purpose of reducing noise and improving waterproofness, in recent years, a pump and an electric motor for driving the pump are housed in a case, and an operating member for operating a switch for turning the electric motor on and off is arranged on one surface of the case. Power units with a structure are being adopted.

However, in the case structure of the conventional power unit, the switch for turning on and off the electric motor and the arrangement of the operating member for operating the electric motor with respect to the case are set in advance in one way, and the switch operating the operating member is located. The face was limited to one specific face. For example, if the front surface of the case is the switch operation surface on which the operation member is located, the arrangement of the switch and the operation member cannot be changed. Therefore, the switch operation surface is limited to the case front surface. For this reason, it is necessary to prepare two types of products, a case structure in which the switch operation surface is the front surface of the case and a case structure in which the switch operation surface is the upper surface of the case, according to the demands of consumers. I hated that it would rise. In addition, there has been a problem that the user cannot change the switch operation surface after purchasing the product.

In view of the above points, the present invention aims to reduce noise and improve waterproofness by surrounding the pump and the electric motor part, and to arrange the switch operation surface for controlling the electric motor (front or upper surface). It is intended to provide a power unit case structure that can be changed.

A case structure of a power unit according to a first aspect of the present invention covers a lower case portion that covers at least a side surface portion of an oil tank, a pump that sucks up hydraulic oil in the oil tank and sends it out, and an electric motor that drives the pump. And an upper case part connected to the lower case part, a switch accommodating recess opening on both front and upper surfaces of the upper case part, and a switch connected to a circuit for controlling the electric motor with an extension cable. A cover part having a fixed side cover part having a holding part for holding and an opening / closing door part having an operation member which is rotatable with respect to the fixed side cover part and operates a switch held by the holding part; In the state where the extension cable and the switch are stored, one side of the switch storage recess is covered by the fixed side cover portion, and the other side is opened. It is covered by a door so that it can be opened and closed, and the fixed side cover can be attached to either the upper surface or the front surface of the upper case section, and when the fixed side cover section is fixed to the upper surface of the upper case section. The opening / closing door covers the front of the recess for storing the switch so that the switch operation surface on which the operation member for the switch operation is located becomes the front side of the upper case part, and the fixed side cover part is When fixed to the front surface of the upper case portion, the opening / closing door portion covers the upper surface of the switch housing recessed portion so that the switch operation surface on which the operating member is located is on the upper surface side of the upper case portion. There is.

The case structure of the power unit according to the second aspect of the present invention includes a lower case portion that covers at least a side surface portion of the oil tank, and a hydraulic oil that is disposed above the oil tank and sucks up the hydraulic oil in the oil tank to send the oil. An upper case part that covers the pump that discharges and an electric motor that drives the pump and is connected and fixed to the upper part of the lower case part; and a switch accommodating recess that opens over the front surface and the upper surface of the upper case part, A fixed side cover part having a holding part for holding a switch connected to a circuit for controlling an electric motor with an extension cable, and a switch held by the holding part so as to be rotatable with respect to the fixed side cover part A cover part including an opening / closing door part having an operation member, and the switch housing recess is in a state where the extension cable and the switch are housed. One surface is covered by the fixed side cover portion, and the other surface is openably and closably covered by the opening / closing door portion, and the operation member corresponds to the push button of the switch in the closed state of the opening / closing door portion. The push button-shaped thick portion which is in contact, the fitting portion which fits in the hole of the opening / closing door portion, and the elastic connecting portion which connects the push button-shaped thick portion and the fitting portion to each other. The fixed side cover part can be attached to both the upper surface and the front surface of the upper case part, and when the fixed side cover part is fixed to the upper surface of the upper case part, The opening / closing door covers the front surface of the switch housing recessed portion so that the switch operation surface on which the operation member for the switch operation is located becomes the front surface side of the upper case portion, and the fixed side cover portion is opened. Front of the upper case When it is fixed to the above, the opening / closing door section covers the upper surface of the switch housing recessed portion so that the switch operation surface on which the operation member is located is on the upper surface side of the upper case section.

Further, it is preferable that the holding portion of the fixed cover portion is configured to detachably hold the switch.

[0009]

[Action]

 In the case structure of the power unit of the present invention, since the pump for pumping the hydraulic oil in the oil tank and the electric motor for rotating the pump are covered by the upper case part, noise during operation can be reduced, and rainwater can be reduced. The waterproofness can be improved.

In addition, a mounting surface of the cover part, which includes a fixed side cover part for covering the switch accommodating concave part of the upper case part and an opening / closing door part rotatable with respect to the fixed side cover part, to the upper case part is provided. By changing it, it is possible to change the arrangement of the opening / closing door portion which has an operation member for operating the switch and serves as a switch operation surface. That is, when the fixed side cover is fixed to the upper surface of the upper case, the opening / closing door covers the front surface of the switch storage recess so that the switch operation surface is the front surface of the upper case. When the fixed side cover part is fixed to the front surface of the upper case part, the opening / closing door part covers the upper surface of the switch accommodating recess so that the switch operation surface is located on the upper surface side of the upper case part. Become.

In addition, the operation member includes a push button-shaped thick portion that comes into contact with a push button of the switch when the opening / closing door is closed, and a fitting portion that fits into a hole in the opening / closing door. If the push button-shaped thick portion and the elastic connecting portion that connects the fitting portion are connected to each other, the push button-shaped thick portion is pressed from the outside of the opening / closing door portion to push the switch. The switch can be operated by moving the button, and the switch can be operated in the same way as a normal push button. Moreover, since the opening of the opening / closing door is covered with the operation member, rainwater does not splash on the switch and rainwater or dust does not enter the switch storage recess.

Further, when the holding portion of the fixed cover portion is configured to detachably hold the switch, the opening / closing door portion can be opened and the switch can be easily pulled out to the outside by removing the switch from the holding portion. The push button of the switch can be directly operated externally.

[0013]

【Example】

 Embodiments of a power unit case structure according to the present invention will be described below with reference to the drawings.

1 to 8 show an embodiment of a case structure of a power unit according to the present invention, and FIGS. 1 to 6 show a case where a switch operation surface is a front surface (front surface). FIG. 8 shows a case where the switch operation surface is the top surface. Further, FIG. 9 shows a circuit diagram of an electric circuit and a hydraulic circuit of the power unit.

First, the case where the switch operation surface is the front surface will be described with reference to FIGS. 1 to 6.

A lower case portion 10 made of metal die casting is provided so as to cover at least four side surfaces of the substantially rectangular parallelepiped resin-made or metal oil tank 1 shown in FIG. 1, and the front surface of the lower case portion 10 and A handle 11 is integrally formed on the back side for convenience of carrying and installation. In addition, a plurality of thick ribs 12 are formed in the lower case portion 10 in the vertical direction so as to form female screw holes for attaching an upper case portion 20 described later with screws and for reinforcement. . Although illustration is omitted, the lower case portion 10 is provided with a locking tool or the like for locking the oil tank 1 so as not to fall off from the lower case portion 10.

As shown in FIGS. 2 to 4 and 6, the upper case portion 20 is a combined structure of the upper case body portion 21 and the upper case side surface lid portion 31, and includes the upper case body portion 21 and The upper case side surface lid portion 31 is formed of a resin molded product so that they can be fitted and integrated with each other.

The upper case main body portion 21 has a pump and electric motor storage space 22 that is substantially sealed by covering the upper case side surface lid portion 31, and a switch storage recess 23. In the pump and electric motor storage space 22, there are a pump 2 for sucking up and sending out the hydraulic oil in the oil tank 1, a motor 3 for rotationally driving the pump, and a path for the hydraulic oil introduced from the oil tank 1 into the pump 2. The inserted filter 4 is provided. That is, the pump 2 and the electric motor 3 are mounted on the bottom surface portion 22a of the pump and electric motor housing space 22, and the filter 4 is fixed along with the pump 2. Further, the switch housing recess 23 is opened over the front surface and the upper surface of the upper case main body portion 21, and connects the push button switch 40 and the push button switch 40 to an electric circuit for controlling the operation of the electric motor 3. It is possible to store the extension cable 41 for this purpose. Reference numeral 42 is a connector portion for connecting the end portion of the extension cable 41 and the electric circuit.

As described above, the upper case main body 21 and the upper case side cover 31 which form the upper case 20 are connected and fixed to the upper part of the lower case 10 in a state of being fitted and assembled with each other. . That is, the upper case body portion 21 and the upper case side surface lid portion 31 are placed on the upper end surface of the lower case portion 10, and the screw 24 is screwed into the female screw hole formed in the thick rib 12 on the lower case portion 10 side. It is fixed by matching. The pump and electric motor storage space 22 is substantially sealed by combining the upper case body 21 and the upper case side cover 31. The pump 2 and the electric motor 3 are located above the oil tank 1 and are located above the oil tank 1. It will be covered with the case portion 20.

The cover part 50 is made of the same resin as the upper case part 20, and holds the push button switch 40 connected to an electric circuit for controlling the electric motor 3 with an extension cable 41. It comprises a fixed side cover section 60 having a section 61, and an opening / closing door section 70 rotatably connected to the fixed side cover section 60 by a hinge 71. The opening / closing door part 70 has a hole 72 into which an operating member 80 for operating the push button switch 40 held by the holding part 61 is mounted, and the operating member 80 is inserted in the hole 72. It can be attached.

As shown in FIGS. 1 to 4, the opening / closing door portion 70 serving as a switch operating surface on which the operating member 80 for operating the push button switch 40 is located is the front surface side of the upper case portion 20. In this case, the fixed side cover portion 60 is attached and fixed to the upper surface of the upper case main body portion 21 around the upper surface opening of the switch housing recess 23 with a screw 62 to cover the upper surface opening of the switch housing recess 23. As a result, the opening / closing door 70 covers the front opening of the switch housing recess 23 so as to be openable and closable. Here, the opening / closing door portion 70 integrally has a handle 73 for facilitating the opening / closing operation, and is held in a closed state with respect to the upper case body portion 21 by a latch mechanism or the like not shown. ing.

As shown in FIGS. 1 and 4, the holding portion 61 of the fixed side cover portion 60 has a substantially box shape that supports both side surfaces, the bottom surface, and the back surface of the push button switch 40. It has a function of holding the push buttons 40a and 40b of the push button switch 40 detachably so that the longitudinal direction is the lateral direction and the push buttons 40a and 40b of the push button switch 40 face the front surface. However, by tightening the fixing screw 63 screwed to the one side surface portion 61a of the holding portion 61, the push button switch 40 can be fixedly held so as not to rattle.

The operation member 80 is an elastic member such as rubber, and as shown in the sectional view of FIG. 5, the push button-shaped thick portions 81 a and 81 b and the peripheral edge of the hole 72 of the opening / closing door portion 70. It is composed of a fitting portion 82 for fitting and an elastic connecting portion 83 for connecting the push button-shaped thick portions 81a, 81b and the fitting portion 82, so as to cover the punching hole 72. It is attached to the periphery. As shown in FIG. 1, the push button-shaped thick portions 81a and 81b come into contact with the tip surfaces of the push buttons 40a and 40b of the push button switch 40 when the opening / closing door portion 70 is closed. . Further, the elastic connecting portion 83 has a zigzag cross section in order to have appropriate elasticity.

FIG. 9 shows a hydraulic circuit including an electric circuit for controlling on / off of the electric motor 3 of the power unit and the pump 2, which turns on / off the electric power supply from the battery B of a truck or the like. The contacts of the magnetic switch 90 are connected to the electric motor 3 in series. Therefore, when the power switch 91 on the battery B side is turned on, the extension cable 41 presses the push button 40a of the push button switch 40 connected to the electric circuit, and thereby the exciting coil of the magnetic switch 90 is turned on. By energizing, the contact of the magnetic switch 90 is turned on, the electric motor 3 is rotated, and the pump 2 can be rotationally driven. When the pump 2 is rotationally driven, the hydraulic oil in the oil tank 1 is introduced into the pump 2 through the filter 4, and the hydraulic oil sucked up by the pump 2 and discharged from the pump passes through the check valve 100. Supplied to external hydraulic equipment. A relief valve 101 is provided between the discharge side of the pump 2 and the oil tank 1 to return the hydraulic oil to the oil tank 1 when overloaded. Further, a filter 102, a switching solenoid valve 103, and a throttle valve 104 are connected in series between the discharge side of the pump 2 and the oil tank 1. The switching operation of the switching solenoid valve 103 can be executed by pressing the push button 40b of the push button switch 40. When the push button 40b is pressed, the switching solenoid valve 103 is excited and the switching solenoid valve 103 is opened, and the filter 102, the hydraulic oil is returned to the oil tank 1 through a series connection path of the switching solenoid valve 103 and the throttle valve 104.

The push operation of the push buttons 40 a and 40 b of the push button switch 40 described above is performed when the opening / closing door portion 70 is closed from the front side of the opening / closing door portion 70 serving as a switch operation surface to the push button-shaped thick wall of the operating member 80. This can be performed by pressing the parts 81a and 81b. That is, the push button 40a may be pressed by pressing the push button-shaped thick portion 81a that is in contact with the push button 40a, and the push button 40b may be pressed by pressing the push button 40a that is in contact with the push button 40a. The thick portion 81b may be pressed.

As described above, in FIGS. 1 to 6, the case where the opening / closing door portion 70 serving as the switch operation surface is located on the front surface of the upper case portion 20 has been described. Depending on the mounting position on the vehicle, it may be required to make the switch operation surface the upper surface. In this case, as shown in FIGS. 7 and 8, the opening / closing door portion 70 of the cover component 50 is set to be openably and closably located on the upper surface side of the upper case portion 20. That is, the fixed side cover portion 60 is attached and fixed to the front surface (front surface) of the upper case main body portion 21 around the front opening of the switch housing recess 23 with the screw 62 to cover the front opening of the switch housing recess 23. As a result, the opening / closing door portion 70 covers the upper opening of the switch housing recess 23 so as to be openable and closable. The opening / closing door 70 is held in a closed state with respect to the upper case body 21 by a latch mechanism or the like (not shown).

As shown in FIGS. 7 and 8, even when the opening / closing door portion 70 serving as a switch operation surface on which the operation member 80 for operating the push button switch 40 is located is on the upper surface side of the upper case portion 20. Since the relative positional relationship between the push button switch 40 held by the holding portion 61 of the fixed side cover portion 60 and the operation member 80 on the opening / closing door portion 70 side is the same, the push button shaped thick portions 81a and 81b are The push buttons 40a and 40b of the push button switch 40 can be pushed by the pushing operation.

According to this embodiment, the following effects can be obtained.

(1) Since the pump 2 that pumps the hydraulic oil in the oil tank 1 and the electric motor 3 that rotationally drives the pump 2 are covered with the upper case portion 20, it is possible to reduce noise during operation and to prevent rainwater from raining. The waterproofness can be improved.

(2) The upper part of the cover component 50 including the fixed side cover part 60 for covering the switch housing recess 23 of the upper case part 20 and the opening / closing door part 70 rotatable with respect to the fixed side cover part. By changing the attachment surface to the case portion 20, it is possible to change the arrangement of the opening / closing door portion 70 which has the operation member 80 for operating the push button switch 40 and serves as the switch operation surface. That is, when the fixed-side cover portion 60 is fixed to the upper surface of the upper case portion 20, the opening / closing door portion 70 covers the front surface of the switch housing recess 23 so that the switch operating surface can be opened and closed. When the fixed side cover portion 60 is fixed to the front surface of the upper case portion 20, the opening / closing door portion 70 covers the upper surface of the switch accommodating concave portion 23 so that the switch operation can be performed. The surface is the upper surface side of the upper case portion 20.

(3) The operation member 80 has push button-shaped thick portions 81 a and 81 b that come into contact with the push buttons 40 a and 40 b of the push button switch 40 in the closed state of the opening and closing door portion 70, and Since it comprises a fitting portion 82 that fits into the hole 72 of the opening / closing door portion 70 and an elastic connecting portion 83 that connects the push button-shaped thick portions 81a and 81b and the fitting portion 82, By pressing the pushbutton-shaped thick portions 81a and 81b from the outside of the opening / closing door portion 70, the pushbuttons 40a and 40b of the switch 40 can be moved to operate the switch 40. The switch can be operated in the same way as a button. Moreover, since the opening 72 of the opening / closing door 70 is covered with the operating member 80, rainwater does not splash on the switch 40 and rainwater or dust does not enter the switch housing recess 23.

(4) Since the holding portion 61 of the fixed side cover portion 60 can detachably hold the push button switch 40, the opening / closing door portion 70 is opened and the push button switch 40 is removed from the holding portion 61. The push buttons 40a and 40b of the push button switch 40 can be directly operated outside.

Although the oil tank 1 has a rectangular parallelepiped shape in the above embodiment, it may have a cylindrical shape or the like.

Further, the upper case portion 20 is described as a combined structure of the upper case body portion 21 and the upper case side surface lid portion 31, but since the pump 2 and the electric motor 3 are housed inside the upper case portion 20. Further, how to divide the upper case portion 20 can be arbitrarily selected.

Although the push button switch 40 shown in the embodiment has two push buttons, the present invention is also applicable to push button switches having three or more push buttons.

Although the embodiment of the present invention has been described above, it is obvious to those skilled in the art that the present invention is not limited to this and various modifications and changes can be made within the scope of the claims. Let's do it.

[0037]

[Effect of device]

 As described above, according to the case structure of the power unit of the present invention, the lower case portion that covers at least the side surface portion of the oil tank, and the upper case portion that covers the pump and the electric motor and is connected to the lower case portion described above are provided. A fixed-side cover portion having a switch housing recess opened over the front surface and the upper surface of the upper case portion, and a holding portion for holding a switch connected to a circuit for controlling the electric motor by an extension cable; A cover part comprising an opening / closing door part having a manipulation member that is rotatable with respect to the side cover part and operates the switch held by the holding part; and the switch housing recess contains the extension cable and the switch. In this state, one surface is covered with the fixed side cover portion and the other surface is covered with the opening / closing door portion so as to be freely opened and closed. Since the lid portion can be attached to both the upper surface and the front surface of the upper case portion, by fixing the fixed side cover portion to the upper surface of the upper case portion, the opening / closing door portion (switch operation surface) Covers the front of the switch storage recess so that the switch operating surface on which the operation member for operating the switch is located is the front side of the upper case part, and the fixed cover part is the front side of the upper case part. When fixed to, the opening / closing door portion covers the upper surface of the switch housing recessed portion so that the switch operation surface becomes the upper surface side of the upper case portion. As a result, by simply changing the mounting position of the fixed side cover section, the switch operation surface can be made into two types, the front surface and the upper surface, and it is possible to install the switch at various mounting positions on various vehicles. As described above, it is not necessary to prepare the two types of case structures from the beginning, and it is possible to reduce the cost and manage the manufacturing process easily.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a case structure of a power unit according to the present invention, in which a switch operation surface is a front surface.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a front view of the same with the opening / closing door opened.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a perspective view of the embodiment of the present invention viewed from the back side when the switch operation surface is the front surface.

FIG. 7 is a side sectional view showing an embodiment of the present invention in which a switch operation surface is an upper surface.

FIG. 8 is a perspective view of the same.

FIG. 9 is a circuit diagram showing an electric circuit and a hydraulic circuit of the power unit in the example.

[Explanation of symbols]

 1 Oil tank 2 Pump 3 Electric motor 4,102 Filter 10 Lower case part 20 Upper case part 21 Upper case body part 23 Switch storage recess 31 Upper case side cover part 40 Push button switch 40a, 40b Push button 41 Extension cable 50 Cover part 60 Fixed Side Cover Part 61 Holding Part 70 Opening / Closing Door Part 71 Hinge 72 Hole 80 Operating Member 81a, 81b Push Button Thick Part 82 Fitting Part 83 Elastic Contact Part 90 Magnetic Switch 103 Switching Solenoid Valve

Claims (3)

[Scope of utility model registration request] 1. A lower case portion that covers at least a side surface portion of an oil tank, a pump that sucks up hydraulic oil in the oil tank and sends it out, and an electric motor that drives the pump, and an upper portion that is connected to the lower case portion. A fixed-side cover part having a case part, a switch accommodating concave part opened over the front surface and an upper surface of the upper case part, and a holding part for holding a switch connected to the circuit for controlling the electric motor by an extension cable. And a cover part including an opening / closing door part having an operating member that is rotatable with respect to the fixed side cover part and operates the switch held by the holding part, wherein the switch housing recess is the extension cable and the switch. 1 side is covered with the fixed side cover part in a state where it is stored, and the other side is openably and closably covered with the opening / closing door part. Can be attached to both the upper surface and the front surface of the upper case portion, and when the fixed side cover portion is fixed to the upper surface of the upper case portion, the opening / closing door portion can open and close the front surface of the switch housing recess. By covering, the switch operation surface on which the operation member for operating the switch is located becomes the front surface side of the upper case portion, and when the fixed side cover portion is fixed to the front surface of the upper case portion, the opening / closing door portion is the switch. A case structure of a power unit, wherein a switch operation surface on which the operation member is located is on an upper surface side of the upper case portion by covering the upper surface of the storage recessed portion so as to be openable and closable. 2. A lower case portion which covers at least a side surface portion of the oil tank, a pump which is arranged above the oil tank and which sucks up hydraulic oil in the oil tank and sends it out, and an electric motor which drives the pump. An upper case part connected and fixed to the upper part of the lower case part, a switch accommodating recess opened on the front surface and an upper surface of the upper case part, and connected to a circuit for controlling the electric motor with an extension cable. A cover part comprising a fixed side cover part having a holding part for holding the switch and an opening / closing door part having an operating member rotatable with respect to the fixed side cover part and operating the switch held by the holding part. The switch housing recess is covered with the extension cable and the switch, one surface is covered with the fixed side cover portion, and the other surface is the opening / closing door. And in openably and covered with, the operating member is a push button-like thick portion on the push button abuts the switch in the closed state of the door unit,
A fitting part that fits into the hole of the opening / closing door part, and an elastic connecting part that connects the push-button thick part and the fitting part, and covers the hole. The side cover portion can be attached to either the upper surface or the front surface of the upper case portion, and when the fixed side cover portion is fixed to the upper surface of the upper case portion, the opening / closing door portion covers the front surface of the switch housing recess. The switch operation surface on which the operation member for operating the switch is located becomes the front surface side of the upper case portion by being covered so as to be openable and closable, and when the fixed side cover portion is fixed to the front surface of the upper case portion, the opening / closing door portion The case structure of the power unit, wherein the switch operation surface on which the operation member is located is on the upper surface side of the upper case portion by opening and closing the upper surface of the switch housing recessed portion. 3. The power unit case structure according to claim 1, wherein the holding portion holds the switch in a detachable manner.