Electro-hydraulic motor pump

Abstract

The utility model discloses an electro-hydraulic motor pump which comprises a motor shell, a pressure sensor and a wire, a pump body and an electric control board assembly are arranged in the motor shell, and the pump body and the electric control board assembly are arranged at the two ends of the motor shell respectively. A placing hole is formed in one end of the pump body away from the electric control board assembly; the electric control board assembly comprises a low-voltage electric control board; the pressure sensor is arranged in the placing hole, the detection end of the pressure sensor is opposite to the electric control board assembly, and the wire harness end of the pressure sensor faces the electric control board assembly; one end of the wire is connected with the positive and negative electrodes of a power supply and / or the positive and negative electrodes of a signal of the pressure sensor, the other end of the wire is connected with a wire pressing terminal, the wire pressing terminal is connected with a connector, and the wire pressing terminal is connected to the low-voltage electric control board through the connector. The pressure sensor and the low-voltage electric control board are connected through the wire, the wire pressing terminal and the connector, the connection structure is compact, installation, disassembly and maintenance are convenient, stability and reliability are achieved, the production cost is low, and mass production can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electro-hydraulic motor pump and belongs to the pump technical field. BACKGROUND

[0002] The electro-hydraulic motor pump is a kind of hydraulic element for providing pressurized liquid for hydraulic transmission, and it is a kind of pump.Its function is to convert the mechanical energy of power machine (such as motor and internal combustion engine etc.) into liquid pressure energy.

[0003] In the electro-hydraulic motor pump unit, the electric control connection of high-efficiency and stable and reliable pressure sensor is generally required, the existing electro-hydraulic motor pump installs pressure sensor more complex, and the pressure sensor in the electro-hydraulic motor pump is unstable. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of prior art, the utility model aims at providing an electro-hydraulic motor pump with simple and convenient pressure sensor installation and stable reliability.

[0005] To realize the foregoing utility model purposes, the utility model adopts the technical scheme including: an electro-hydraulic motor pump, including motor shell, pressure sensor and wire, the motor shell inside is provided with pump body and electric control board assembly, the pump body and electric control board assembly are respectively arranged at the two ends of motor shell;The one end away from electric control board assembly of pump body is provided with placing hole;The electric control board assembly includes low-voltage electric control board;The pressure sensor is arranged in the placing hole, the detection end of the pressure sensor is away from electric control board assembly, and the wire harness end of the pressure sensor faces electric control board assembly;One end of the wire is connected with the power supply positive and negative pole and / or signal positive and negative pole of pressure sensor, the other end of the wire is connected with pressure wire terminal, the plug-in connector is connected on the pressure wire terminal, and the pressure wire terminal is connected on the low-voltage electric control board through plug-in connector.

[0006] Further, the inside of the motor shell is provided with a through hole, and the wire passes through the through hole and is connected with the pressure wire terminal.

[0007] Further, the one end away from electric control board assembly of the pump body is provided with a rear cover, the rear cover is closely attached to the pump body, the rear cover is provided with an oil inlet and an oil outlet, the side wall of the oil inlet and oil outlet passage is provided with an oil channel, and the oil channel is connected with the detection surface of the pressure sensor.

[0008] Further, the first O-ring and the first plastic retainer ring are arranged between the pressure sensor and the placing hole to seal the pressure sensor and the placing hole.

[0009] Further, the second O-ring is arranged between the end surface of the pressure sensor and the rear cover, and the second O-ring and the rear cover form a plane seal.

[0010] Further, an outer surface of the wire is provided with a heat shrink tube for wrapping the wire.

[0011] Further, the electric control board assembly further comprises a high-voltage electric control board, which is arranged outside the motor shell

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] 1) The electro-hydraulic motor pump provided by the utility model is connected with the pressure sensor and the low-voltage electric control board through the wire, the wire terminal and the connector, has compact connection structure, is convenient to install, disassemble, maintain, stable and reliable, has low production cost and can realize mass production.

[0014] 2) The electro-hydraulic motor pump provided by the utility model is provided with the first O-shaped ring and the first plastic retainer ring between the pressure sensor and the placing hole, is used for sealing the pressure sensor and the placing hole, and is stable and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Fig. 1 is a sectional view of an electro-hydraulic motor pump provided in a typical embodiment case of the utility model;

[0017] Fig. 2 is another sectional view of an electro-hydraulic motor pump provided in a typical embodiment case of the utility model;

[0018] Fig. 3 is a connection schematic view of the pressure sensor, the wire terminal and the connector provided in a typical embodiment case of the utility model;

[0019] Mark explanation: 1, pressure sensor;2, first O-shaped ring;3, plastic retainer ring;4, rear cover;5, pump body;6, wire;7, wire terminal;8, connector;9, shell;10, high-voltage electric control board;11, low-voltage electric control board. DETAILED DESCRIPTION

[0020] In view of the deficiencies in the prior art, the present application has been proposed after long-term research and a large number of practices. The technical solutions, implementation processes and principles will be further explained and described as follows.

[0021] As Figs. 1-3The utility model discloses an electro-hydraulic motor pump, the electro-hydraulic motor pump includes motor casing 9, pressure sensor 1, wire 6, the inside of motor casing 9 is provided with pump body 5 and electric control board subassembly, pump body 5 and electric control board subassembly are arranged at the both ends of motor casing 9 respectively, the one end of pump body 5 away from electric control board subassembly is provided with the hole of placing, pressure sensor 1 sets up in the hole of placing, specifically, first O ring 2 and first plastic baffle ring 3 are arranged between pressure sensor 1 and the hole of placing to be used for sealing pressure sensor 1 and the hole of placing, the detection end of pressure sensor 1 is away from electric control board subassembly, the wire harness end of pressure sensor 1 is towards electric control board subassembly, electric control board subassembly includes low voltage electric control board 11, electric control board subassembly still includes high voltage electric control board 10, high voltage electric control board 10 sets up at the outside of motor casing 9, one end of wire 6 is connected with the power supply positive and negative pole of pressure sensor 1 and / or signal positive and negative pole, the other end of wire 6 is connected with pressure wire terminal 7, and the connector 8 is connected on pressure wire terminal 7, and pressure wire terminal is connected on low voltage electric control board 11 through connector 8. Preferably, the outer surface of wire 6 is provided with heat shrink tube 12, and the heat shrink tube 12 is used for wrapping protection wire 6. The utility model connects pressure sensor 1 and low voltage electric control board 11 through wire 6, pressure wire terminal 7 and connector 8, and the connection structure is compact, and installation, disassembly and maintenance are convenient, stable and reliable, and production cost is low, and mass production can be realized.

[0022] On the basis, the inside of motor casing 9 is provided with a through hole, and the wire 6 passes through the through hole and is connected with the pressure wire terminal 7.

[0023] On the basis, the one end of pump body 5 away from the electric control board subassembly is provided with a rear cover 4, the rear cover 4 is closely attached with the pump body 5, which facilitates the disassembly and maintenance of the pressure sensor 1, the rear cover 4 is provided with an oil inlet and an oil outlet, the side wall of the oil inlet and the oil outlet channel is provided with an oil channel, and the oil channel is connected with the detection surface of the pressure sensor 1. In order to improve the sealing performance, the second O-ring is arranged between the end surface of the pressure sensor 1 and the rear cover 4, and the second O-ring and the rear cover 4 form a plane seal.

[0024] It should be understood that the above embodiments are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and it cannot limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit and essence of the utility model should be covered within the protection scope of the utility model.

Claims

1. An electro-hydraulic motor pump characterized by: The utility model relates to a kind of pressure sensor and its installation structure, including Motor housing (9), the pump body (5) and electric control board assembly are arranged inside the motor housing (9), the pump body (5) and electric control board assembly are respectively arranged at both ends of motor housing (9);The pump body (5) is provided with a placing hole at one end away from electric control board assembly;The electric control board assembly includes low-voltage electric control board (11); Pressure sensor (1), the pressure sensor (1) is arranged in the placing hole, the detection end of the pressure sensor (1) is away from electric control board assembly, and the wire harness end of the pressure sensor (1) is towards electric control board assembly; Wire (6), one end of the wire (6) is connected with the power supply positive and negative pole and / or signal positive and negative pole of pressure sensor (1), the other end of the wire (6) is connected with pressure terminal (7), and the pressure terminal (7) is connected with connector (8) on it, and the pressure terminal is connected on low-voltage electric control board (11) by connector (8).

2. An electro-hydraulic motor pump as claimed in claim 1, characterized in that: The inside of the motor housing (9) is provided with a through hole, and the wire (6) is connected with the pressure terminal (7) through the through hole.

3. An electro-hydraulic motor pump as claimed in claim 2, characterized in that: The pump body (5) is provided with a rear cover (4) at one end away from electric control board assembly, the rear cover (4) is closely attached to the pump body (5), the rear cover (4) is provided with an oil inlet and an oil outlet, the side wall of the oil inlet and the oil outlet passage is provided with an oil channel, and the oil channel is connected with the detection surface of the pressure sensor (1).

4. An electrohydraulic motor pump as claimed in claim 1, characterized in that: First O-ring (2) and first plastic retainer (3) are arranged between the pressure sensor (1) and the placing hole to seal the pressure sensor (1) and the placing hole.

5. An electrohydraulic motor pump as claimed in claim 1, characterized in that: Second O-ring is arranged between the end surface of the pressure sensor (1) and the rear cover (4), and the second O-ring forms a plane seal with the rear cover (4).

6. An electrohydraulic motor pump as claimed in claim 1, characterized in that: The outer surface of the wire (6) is provided with a heat shrink tube (12), and the heat shrink tube (12) is used for wrapping the wire (6).

7. An electrohydraulic motor pump as claimed in claim 1, characterized in that: The electric control board assembly further includes high-voltage electric control board (10), and the high-voltage electric control board (10) is arranged on the outside of the motor housing (9).

Images