CN213116574U

CN213116574U - Low-noise hydraulic pump

Info

Publication number: CN213116574U
Application number: CN202020816683.9U
Authority: CN
Inventors: 许桂林
Original assignee: Anhui Nanruo Forklift Co ltd
Current assignee: Nanruo Forklift Co ltd
Priority date: 2020-05-17
Filing date: 2020-05-17
Publication date: 2021-05-04
Anticipated expiration: 2030-05-17

Abstract

The utility model discloses a low-noise hydraulic pump, which comprises a pump body and a silencing installation box, wherein one end of the pump body is in transmission connection with a transmission shaft, one end of the transmission shaft is in transmission connection with a motor, and the other end of the transmission shaft is fixedly connected with a swash plate arranged in the pump body; one end of the swash plate, which is far away from the transmission shaft, is connected with a plurality of plungers, the top of the pump body is respectively provided with a low-pressure oil suction port and a high-pressure oil outlet, and the plungers are communicated with the high-pressure oil outlet; the bottom of the pump body is welded with a connecting block, and the bottom of the connecting block is fixedly connected with the inner bottom surface of the silencing installation box; the bottom welding of amortization install bin has the buffer layer, the top welding of buffer layer has the mounting panel. The utility model discloses a piston shoe reduces the friction between plunger and the sloping cam plate, reduces the vibrations that the pump body during operation produced through the buffer layer, and the noise that produces when the amortization cotton absorption hydraulic pump operation through amortization install bin inside, whole device can effectively solve the big problem of traditional hydraulic pump during operation noise.

Description

Low-noise hydraulic pump

Technical Field

The utility model relates to a hydraulic pump field specifically is a low noise hydraulic pump.

Background

The hydraulic pump is a power element of a hydraulic system, and is an element which is driven by an engine or an electric motor, sucks oil from a hydraulic oil tank, forms pressure oil, discharges the pressure oil and sends the pressure oil to an execution element. The hydraulic pump is structurally divided into a gear pump, a plunger pump, a vane pump and a screw pump, and the working principle of the hydraulic pump is that the movement brings the change of the volume of a pump cavity, so that fluid is compressed to enable the fluid to have pressure energy.

The hydraulic pump can produce a large amount of noises because of friction or vibrations in the operation process, and this not only can influence the life of pump itself, also can harm staff's hearing simultaneously. In order to solve the problems, the traditional hydraulic pump is improved, and a low-noise hydraulic pump is provided.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model relates to a low-noise hydraulic pump, which comprises a pump body and a silencing installation box, wherein one end of the pump body is in transmission connection with a transmission shaft, one end of the transmission shaft is in transmission connection with a motor, and the other end of the transmission shaft is fixedly connected with a swash plate arranged in the pump body; one end of the swash plate, which is far away from the transmission shaft, is connected with a plurality of plungers, the top of the pump body is respectively provided with a low-pressure oil suction port and a high-pressure oil outlet, and the plungers are communicated with the high-pressure oil outlet; the noise reduction mounting box is arranged outside the pump body, a connecting block is welded at the bottom of the pump body, and the bottom of the connecting block is fixedly connected with the inner bottom surface of the noise reduction mounting box; the bottom welding of amortization install bin has the buffer layer, the top welding of buffer layer has the mounting panel, the both ends car of mounting panel has the threaded connection hole that is used for fixed connection mounting panel.

As an optimal technical scheme of the utility model, the amortization install bin includes bottom plate, top cap and four curb plates, four of them the curb plate all rotates with the bottom plate through the hinge to be connected, the top cap passes through screw and curb plate fixed connection.

As a preferred technical scheme of the utility model, it leads to the groove to be provided with the level that can supply the transmission shaft to pass on the curb plate, be provided with the vertical logical groove that can supply the oil pipe to pass on the top cap to the inside of curb plate and top cap all bonds and has attracts the cotton.

As an optimal technical scheme of the utility model, all be connected with the piston shoe between plunger and the sloping cam plate, the piston shoe is the annular array and arranges the one end of keeping away from the transmission shaft at the sloping cam plate.

As a preferred technical scheme of the utility model, the side welding of transmission shaft has the rotation to connect protrudingly, the side of the pump body is provided with and rotates the rotation spread groove of connecting protruding matching, rotate to connect protrudingly and rotate the spread groove and rotate and be connected.

As an optimal technical scheme of the utility model, the buffer layer comprises a plurality of damping spring, damping spring is the rectangle display and arranges the top surface at the mounting panel.

As an optimal technical scheme of the utility model, damping spring's inside is provided with guide cylinder and guide pillar, the bottom of guide cylinder and the top surface welding of mounting panel, the one end of guide pillar and the bottom surface welding of guide cylinder sliding connection, the other end and amortization install bin

The utility model has the advantages that: the low-noise hydraulic pump reduces friction between the plunger and the swash plate through the sliding shoes, reduces vibration generated when the pump body works through the damping layer, absorbs noise generated when the hydraulic pump works through silencing cotton in the silencing installation box, is reasonable in layout and ingenious in design, and can effectively solve the problem of high noise when the traditional hydraulic pump works; in addition, the rotary connecting bulge and the rotary connecting groove can improve the stability of the transmission shaft during horizontal rotation, the threaded connecting holes are favorable for fixed connection of the mounting plate, and the space occupied by the foldable silencing mounting box can be saved when the foldable silencing mounting box is not used.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a low noise hydraulic pump of the present invention;

FIG. 2 is a schematic view of a silencing mounting box of a low noise hydraulic pump according to the present invention;

FIG. 3 is an enlarged schematic view of the low noise hydraulic pump of the present invention at A in FIG. 1;

in the figure: 1. a pump body; 2. a drive shaft; 3. a swash plate; 4. a plunger; 5. a low pressure suction port; 6. a high pressure oil outlet; 7. connecting blocks; 8. a shock-absorbing layer; 9. mounting a plate; 10. connecting a threaded hole; 11. a silencing installation box; 12. a damping spring; 13. a guide cylinder; 14. a guide post; 15. The connecting bulge is rotated; 16. rotating the connecting groove; 17. a slipper.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example (b): as shown in fig. 1, a low-noise hydraulic pump comprises a pump body 1 and a silencing installation box 11, wherein one end of the pump body 1 is in transmission connection with a transmission shaft 2, one end of the transmission shaft 2 is in transmission connection with a motor, and the other end of the transmission shaft 2 is fixedly connected with a swash plate 3 arranged in the pump body 1; the swash plate is characterized in that one end, far away from the transmission shaft 2, of the swash plate 3 is connected with a plurality of plungers 4, the top of the pump body 1 is provided with a low-pressure oil suction port 5 and a high-pressure oil outlet 6 respectively, and the plungers 4 are communicated with the high-pressure oil outlet 6. The piston shoes 17 are connected between the plunger 4 and the swash plate 3, the piston shoes 17 are arranged at one end of the swash plate 3 far away from the transmission shaft 2 in an annular array mode, and the piston shoes 17 can reduce friction between the plunger 4 and the swash plate 3 and reduce noise generated by the part.

The side welding of transmission shaft 2 has the rotation to connect protruding 15, the side of the pump body 1 is provided with the rotation spread groove 16 that matches with the protruding 15 of rotation connection, rotate to connect protruding 15 and rotate spread groove 16 and rotate and be connected, rotate to connect protruding 15 and rotate spread groove 16 and improved the stability when 2 horizontal rotation of transmission shaft.

As shown in fig. 2, the silencing installation box 11 is arranged outside the pump body 1, the connecting block 7 is welded at the bottom of the pump body 1, and the bottom of the connecting block 7 is fixedly connected with the inner bottom surface of the silencing installation box 11. The silencing installation box 11 comprises a bottom plate 111, a top cover 113 and four side plates 112, wherein the four side plates 112 are rotatably connected with the bottom plate 111 through hinges, and the top cover 113 is fixedly connected with the side plates 112 through screws. The utility model provides an amortization install bin 11 has folding function, is not only convenient for install the hydraulic pump, also can pack up it when not using, can effectively practice thrift and take up an area of the space. The horizontal through groove that can supply transmission shaft 2 to pass is provided with on the curb plate 112, be provided with the vertical through groove that can supply the oil pipe to pass on the top cap 113 to the inside of curb plate 112 and top cap 113 all bonds and attracts the cotton (do not make obvious sign in the picture), inhales the noise that the cotton absorbable hydraulic pump during operation produced of sound.

As shown in fig. 3, the bottom of the silencing installation box 11 is welded with a damping layer 8, the bottom of the damping layer 8 is welded with an installation plate 9, and two ends of the installation plate 9 are lathed with threaded connection holes 10 for fixedly connecting the installation plate 9.

The shock absorption layer 8 is composed of a plurality of shock absorption springs 12, the shock absorption springs 12 are arranged on the top surface of the mounting plate 9 in a rectangular array mode, the shock absorption springs 12 can reduce the shock generated when the hydraulic pump operates, and therefore the noise generated due to the shock can be reduced. The damping spring 12 is internally provided with a guide cylinder 13 and a guide post 14, the bottom of the guide cylinder 13 is welded with the top surface of the mounting plate 9, one end of the guide post 14 is connected with the guide cylinder 13 in a sliding manner, the other end of the guide post is welded with the bottom surface of the silencing mounting box 11, and the guide cylinder 13 and the guide post 14 can improve the connection strength of the damping layer 8.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-noise hydraulic pump comprises a pump body (1) and a silencing installation box (11), and is characterized in that one end of the pump body (1) is in transmission connection with a transmission shaft (2), one end of the transmission shaft (2) is in transmission connection with a motor, and the other end of the transmission shaft is fixedly connected with a swash plate (3) arranged inside the pump body (1); one end, far away from the transmission shaft (2), of the swash plate (3) is connected with a plurality of plungers (4), the top of the pump body (1) is provided with a low-pressure oil suction port (5) and a high-pressure oil outlet (6) respectively, and the plungers (4) are communicated with the high-pressure oil outlet (6); the noise reduction mounting box (11) is arranged outside the pump body (1), a connecting block (7) is welded at the bottom of the pump body (1), and the bottom of the connecting block (7) is fixedly connected with the inner bottom surface of the noise reduction mounting box (11); the bottom welding of amortization install bin (11) has buffer layer (8), the top welding of buffer layer (8) has mounting panel (9), the both ends car of mounting panel (9) has threaded connection hole (10) that are used for fixed connection mounting panel (9).

2. A low noise hydraulic pump according to claim 1, wherein the silencing mounting box (11) comprises a bottom plate, a top cover and four side plates, wherein the four side plates are rotatably connected with the bottom plate through hinges, and the top cover is fixedly connected with the side plates through screws.

3. A low noise hydraulic pump according to claim 2, characterized in that the side plate is provided with a horizontal through slot for the transmission shaft (2) to pass through, the top cover is provided with a vertical through slot for the oil pipe to pass through, and the side plate and the top cover are both bonded with suction cotton.

4. A low noise hydraulic pump according to claim 1, characterized in that a slipper (17) is connected between the plunger (4) and the swash plate (3), and the slipper (17) is arranged in an annular array at an end of the swash plate (3) remote from the drive shaft (2).

5. A low noise hydraulic pump according to claim 1, characterized in that a rotary connection projection (15) is welded to the side of the transmission shaft (2), a rotary connection groove (16) matching with the rotary connection projection (15) is provided to the side of the pump body (1), and the rotary connection projection (15) is rotatably connected to the rotary connection groove (16).

6. A low noise hydraulic pump according to claim 1, characterized in that the damping layer (8) is composed of a plurality of damping springs (12), and the damping springs (12) are arranged in a rectangular array on the top surface of the mounting plate (9).

7. A low noise hydraulic pump according to claim 6, characterized in that the damping spring (12) is provided with a guide cylinder (13) and a guide post (14) inside, the bottom of the guide cylinder (13) is welded to the top surface of the mounting plate (9), one end of the guide post (14) is slidably connected to the guide cylinder (13), and the other end is welded to the bottom surface of the silencing mounting box (11).