TWI653391B - Hydraulic device - Google Patents

Abstract

The invention is a hydraulic device comprising: a storage tank for internal use a working fluid; a pump, which is a power source for supplying the operating fluid from the storage tank to the driving object; and a hydraulic circuit for inputting the working fluid between the storage tank and the driving object And a suction filter having a base end portion embedded in the pump, in order to achieve both improvement in workability during assembly and maintenance, and mounting stability when the suction filter is attached to the pump, in the storage tank and the A retaining portion for preventing the suction filter from coming off is provided at a portion corresponding to the front end portion of the suction filter.

Description

Hydraulic device

The invention relates to a hydraulic device comprising: a tank for storing an actuating liquid inside; a pump for supplying actuating liquid from the storage tank to the driving a power source of the object; a hydraulic circuit for inputting and outputting an actuating fluid between the storage tank and the driving object; and a suction strainer having a base end connected to the pump.

The hydraulic device has been used in the past, including: a storage tank for storing the working fluid inside; a pump, which is a power source for supplying the operating fluid from the storage tank to the driving object; a hydraulic circuit, which is used The input and output of the hydraulic fluid is performed between the storage tank and the driving target, and the suction filter is connected to the pump at its proximal end portion (see, for example, Patent Document 1). Conventionally, in such a hydraulic device, the pump and the suction filter are connected as follows.

In other words, in the conventional hydraulic device, a male screw portion is formed at a proximal end portion of the suction filter, and a female screw hole that can be screwed to the male screw portion is provided at a suction port of the pump to coat the sealing material. After the male threaded portion is disposed, the male threaded portion is screwed to the female threaded hole.

However, such a configuration has an unfavorable situation in that when the suction filter is connected to the pump, it is necessary to manage such as the management of the torque, the direction adjustment of the suction filter, the application of the sealing material, and the like. waste time.

Further, there is a disadvantage that, when the pump is replaced, after the suction filter needs to be removed from the pump, the sealing material of the male screw portion of the suction filter is temporarily removed, and then a new sealing material is applied to the male thread portion. The installation operation of attaching the suction filter to the pump as described in the previous paragraph is performed, and therefore, the replacement operation of the pump also takes time.

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 8-159101

The present invention has been made in view of the above points, and an object thereof is to provide a hydraulic device in which a base end portion of a suction filter is connected to a pump, and the hydraulic device improves workability in assembly or maintenance.

In order to solve the above problems, the hydraulic device of the present invention has the following configuration. That is, the hydraulic device of the present invention includes: a storage tank for storing the working fluid therein; a pump for supplying the operating fluid from the storage tank to the power source for driving the object; and a hydraulic circuit for And inputting and outputting an operating fluid between the storage tank and the driving object; and a suction filter having a base end portion embedded in the pump, the hydraulic device being at a front end of the storage tank and the suction filter Corresponding portions are provided with a retaining portion for preventing the suction filter from coming off.

According to this configuration, the base end portion of the suction filter is fitted into the pump, and a sealing member is provided between the suction filter and the pump, whereby the suction filter can be attached to the pump. The workability at the time is improved. Further, a retaining portion for preventing the suction filter from coming off is provided at a portion of the reservoir corresponding to the front end portion of the suction filter, whereby the front end portion of the suction filter is only inserted into the pump. In the configuration, the suction filter can be prevented from falling off from the pump by the retaining portion. Therefore, the improvement in workability and the mounting stability when the suction filter is attached to the pump can be achieved.

According to the present invention, the hydraulic device to which the base end portion of the suction filter is connected to the pump can achieve stability of connection and can improve workability at the time of assembly or maintenance.

1‧‧‧Hydraulic device

2‧‧‧Terminal board

2a‧‧‧Acoustic fluid inlet

2b‧‧‧ Actuator supply port

2c‧‧‧acting fluid discharge

2d‧‧‧actuating fluid supply path

2e‧‧‧actuating fluid discharge path

2f‧‧‧Decompression pathway

3‧‧‧ storage tank

3a‧‧‧ bottom wall

4‧‧‧ pump

4a‧‧‧ Actuator suction

5‧‧‧ suction filter

5a, 6a‧‧‧ base end

5b‧‧‧ front end

5x‧‧‧O-ring insertion slot

6‧‧‧Return

7‧‧‧Motor

8‧‧‧Relay switch

21‧‧‧ check valve

22‧‧‧ solenoid valve

23‧‧‧Flow control valve

24‧‧‧Reducing valve

25‧‧‧Filter

31‧‧‧Anti-off part (spike)

51‧‧‧Protrusion

91‧‧‧O-ring

C‧‧‧ cylinder

N‧‧ ‧ car box

T‧‧‧ tail gate

Fig. 1 is a schematic view showing a vehicle on which a hydraulic device according to an embodiment of the present invention is mounted.

Fig. 2 is a circuit diagram showing a hydraulic circuit including the hydraulic device of the embodiment.

Fig. 3 is a front elevational view showing the hydraulic device of the embodiment.

Fig. 4 is a left side view showing the hydraulic device of the embodiment.

Fig. 5 is a right side view showing the hydraulic device of the embodiment.

Fig. 6 is a view showing a mounting form when the suction filter is attached to a pump in the embodiment;

Hereinafter, an embodiment of the present invention will be described with reference to Figs. 1 to 6 .

As shown in Fig. 1, the hydraulic device 1 of the present embodiment is mounted on a vehicle of a vehicle. Below the rear portion of the tank N, the operating fluid is supplied to a cylinder C constituting an actuator for raising and lowering the load target (the tailgate T).

As shown in Figures 2 and 3, the hydraulic device 1 comprises: an adapter plate 2 forming a hydraulic circuit; a reservoir 3 joined to the adapter plate 2; a pump 4 for pumping The operating fluid in the storage tank 3 supplies the operating fluid to the adapter plate 2; the suction filter 5 has a base end portion 5a embedded in the pump 4; and a return pipe 6 at the base end portion thereof. 6a is embedded in the adapter plate 2.

As shown in FIG. 2, the adapter plate 2 includes an actuating liquid inlet 2a for receiving supply of actuating liquid from the pump 4, and an actuating liquid supply port 2b for inputting with the cylinder C. An output; and an actuating fluid discharge port 2c for guiding the hydraulic fluid discharged from the cylinder C to the storage tank 3 via the return pipe 6. Further, as shown in FIGS. 2 to 5, the adapter plate 2 incorporates an operating fluid supply path 2d, a check valve 21, an operating fluid discharge path 2e, and a relief passage 2f, and the adapter plate 2 A solenoid valve 22, a flow control valve 23, and a relief valve 24 are mounted. The actuating liquid supply path 2d is a passage that connects the actuating liquid inflow port 2a and the actuating liquid supply port 2b. The check valve 21 is provided in the actuating liquid supply path 2d, and the actuating liquid is prevented from flowing backward from the side of the cylinder C, that is, the side of the liquid supply port 2b, to the side of the pump 4, that is, the side of the moving fluid inlet 2a. The actuating liquid discharge path 2e branches from a portion of the actuating liquid supply path 2d closer to the working fluid supply port 2b than the check valve 21, and communicates with the actuating liquid discharge port 2c. The solenoid valve 22 is disposed in the actuation liquid discharge path 2e, and selectively adopts the first In any one of the state and the second state, the first state blocking actuating liquid flows from the side of the actuating liquid supply port 2b to the side of the actuating liquid discharge port 2c, and the second state allows the actuating liquid to be supplied from the side of the actuating liquid supply port 2b The flow is to the side of the working fluid discharge port 2c. The flow rate control valve 23 is provided between the solenoid valve 22 and the actuating liquid discharge port 2c. The pressure reducing passage 2f branches from a portion of the operating fluid supply path 2d closer to the side of the operating fluid inflow port 2a than the check valve 21, and causes the actuating liquid supply path 2d to actuate The flow rate control valve 23 in the liquid discharge path 2e is short-circuited to the portion on the side of the working fluid discharge port 2c. The pressure reducing valve 24 is provided in the pressure reducing passage 2f, and is opened when the hydraulic pressure of the portion of the operating fluid supply path 2d that is closer to the pump 4 side than the check valve 21 exceeds a predetermined hydraulic pressure. Closed in other cases. Further, reference numeral 25 is a filter provided at a portion on the upstream side of the solenoid valve 22 in the operating fluid discharge path 2e.

Further, in the present embodiment, as shown in FIG. 5, the adapter plate 2 is along the longitudinal direction of the hydraulic device, more specifically, from the reservoir 3 toward the adapter plate. The solenoid valve 22, the flow rate control valve 23, and the pressure reducing valve 24 are attached and detached in the direction of 2.

More specifically, a part of the electromagnetic valve 22 protrudes from the adapter plate 2 toward the sump 3 side, and the opposite side is a male screw (not shown), and the male screw is screwed to the side of the adapter plate 2 A female screw (not shown) is provided, whereby the electromagnetic valve 22 is attached to the adapter plate 2.

A part of the flow rate control valve 23 protrudes from the adapter plate 2 toward the sump 3 side, and the opposite side is a male screw (not shown), and the male screw is screwed to the adapter plate 2 A female screw (not shown) provided on the side is used to attach the flow control valve 23 to the adapter plate 2.

A part of the pressure reducing valve 24 protrudes from the adapter plate 2 toward the sump 3 side, and the opposite side is a male screw (not shown), and the male screw is screwed to the side of the mounting plate 2 (not shown). The female screw, whereby the pressure reducing valve 24 is attached to the adapter plate 2.

As shown in FIG. 3 and FIG. 5, the storage tank 3 is a resin storage tank attached to the side of the attachment plate 2, and an operating fluid is stored therein.

As shown in FIGS. 3 and 5, the pump 4 is attached to the side of the adapter plate 2, and sucks the operating fluid inside the storage tank 3 via the suction filter 5, and to the adapter plate 2 The actuating liquid inlet 2a discharges the working fluid. Further, the pump 4 receives power supply from a motor 7. The motor 7 is mounted to the side of the adapter plate 2, and its output shaft is coupled to the pump 4. The motor 7 is actuated when energized by a relay switch 8.

As described above, and as shown in FIGS. 3 and 6, the proximal end portion 5a of the suction filter 5 is fitted to the pump 4, and the distal end portion 5b is close to or in contact with the bottom wall 3a of the reservoir 3. More specifically, as shown in FIG. 6, the base end side of the suction filter 5 extends along the longitudinal direction of the hydraulic device 1, and on the other hand, the front end side extends toward the bottom wall 3a of the storage tank 3 except for the base end portion 5a. The portion other than the distal end portion 5b is a tubular member having a substantially L shape in a front view. Further, as shown in Fig. 6, the outer diameter of the proximal end portion 5a of the suction filter 5 is larger than the outer diameter of the adjacent portion, and an O-ring insertion groove 5x into which the O-ring 91 which is a sealing member can be inserted is provided. A portion of the inner side of the O-ring 91 is disposed in the O-ring insertion groove 5x, and an outer side is elastically fitted to the suction liquid of the pump 4 The inner wall of the mouth 4a. On the other hand, a plurality of portions of the distal end portion 5b are provided with protrusions 51 which are in contact with the bottom wall 3a of the reservoir 3 in preference to the other portions, and the portion between the projections 51 is used as a guide for introduction from the reservoir 3. The opening of the liquid.

Further, an outer side of the suction filter 5 in the bottom wall of the storage tank 3, that is, a portion on the opposite side of the attachment plate 2 via the suction filter 5, is formed as a retaining portion. The bulge 31. The ridge 31 is constructed such that it is erected from the bottom wall 3a of the sump 3 and extends along the longitudinal direction of the hydraulic device 1, and one end is pressed against the suction filter 5, thereby preventing the ridge The suction filter 5 is detached.

As described above, according to the configuration of the present embodiment, the proximal end portion 5a of the suction filter 5 is fitted into the pump 4, and is outside the suction filter 5 in the bottom wall 3a of the reservoir 3, that is, separated. The suction filter 5 is formed at a portion on the opposite side of the attachment plate 2, and a ridge 31 as a detachment preventing portion is formed. Therefore, the following effects can be obtained.

That is, by attaching the proximal end portion 5a of the suction filter 5 to the pump 4, the attachment operation of attaching the suction filter 5 to the pump 4 can be completed. Therefore, it is necessary to form the sealing material after applying the sealing material to the proximal end portion. The workability of attaching and detaching the suction filter 5 to the pump 4 can be improved as compared with the mounting work of the conventional configuration in which the male screw portion of the base end portion is screwed to the female screw hole on the pump side, and the ridge 31 can be used by the ridge 31 Since the suction filter 5 is prevented from falling off from the pump 4, the workability at the time of assembly or maintenance can be improved, and the mounting stability when the suction filter 5 is attached to the pump 4 can be achieved.

Furthermore, the present invention is not limited to the embodiments described above.

For example, as long as one end of the ridge constituting the retaining portion faces the suction filter, the number or arrangement of the ridges is arbitrary. Moreover, instead of utilizing the bottom of the tank The ridges that are erected on the surface constitute the detachment preventing portion. For example, the detachment portion formed by bulging the portion on the opposite side of the pump from the suction pump tip end portion with respect to the other end portion of the suction pump is formed as long as it can The shape and arrangement of the retaining portion can be arbitrarily set by pressing the front end portion of the suction filter against the one end edge of the raised portion to prevent the suction filter from falling off.

Further, in the above-described embodiment, the retaining portion is formed by a ridge formed by bulging the bottom of the resin storage tank, but the present invention can also be applied to a storage tank formed of various materials, for example, A retaining member is provided on the bottom surface of the metal storage tank by welding or sheet metal processing.

Further, various modifications can be made without departing from the spirit and scope of the invention.

Claims (1)

A hydraulic device includes: a storage tank for storing an operating fluid inside; a pump for supplying a driving fluid from the storage tank to a driving source of a driving object; and a hydraulic circuit for An input and output of the working fluid between the storage tank and the driving object; and a suction filter, the base end portion of which is embedded in the pump, and the hydraulic device is in the front end of the storage tank and the suction filter A corresponding portion is provided with a retaining portion for preventing the suction filter from coming off.