Electro-hydraulic motor pump integrated with rotating speed sensor

Abstract

The utility model discloses an electro-hydraulic motor pump integrated with a rotating speed sensor, which comprises an oil pump, a magnetic steel seat, sensor magnetic steel and an encoder, the oil pump comprises a pump body and a pump shaft, and the pump shaft is arranged in the pump body and is rotatably connected with the pump body; the magnetic steel seat is fixedly arranged at the tail end of the pump shaft and rotates along with the pump shaft; the sensor magnetic steel is fixedly arranged on the magnetic steel seat; the encoder is arranged at the tail end of the pump shaft, and the encoder corresponds to the sensor magnetic steel in position; a rotating speed sensor is arranged in the encoder, the encoder is at least used for receiving signals of magnetic pole changes of magnetic steel of the sensor, and the rotating speed sensor is at least used for detecting the rotating speed of the pump shaft. The sensor magnetic steel is fixedly arranged at the tail end of the pump shaft, the encoder is arranged at the tail end of the pump body, the rotating speed sensor is integrated in the encoder, and the encoder corresponds to the sensor magnetic steel in position, so that the rotating speed of the pump shaft of the oil pump can be stably and accurately detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electro -hydraulic motor pump integrated with rotational speed sensor belongs to electro -hydraulic motor pump technical field. BACKGROUND

[0002] In the electro -hydraulic motor pump unit, the electric control connection of stable and accurate rotational speed sensor is usually needed to assist the electric control part, but the existing electro -hydraulic motor pump cannot capture or cannot accurately capture the rotational speed of the oil pump. SUMMARY

[0003] In view of the deficiency of prior art, the utility model discloses a kind of electro -hydraulic motor pumps integrated with rotational speed sensor, which can accurately detect the rotational speed of pump shaft.

[0004] To achieve the foregoing utility model purposes, the utility model adopts the technical scheme including:

[0005] An electro -hydraulic motor pump integrated with rotational speed sensor, comprising an oil pump, a magnetic steel base, a sensor magnetic steel and an encoder, the oil pump comprises a pump body and a pump shaft, the pump shaft is arranged inside the pump body, and the pump shaft is rotatably connected with the pump body;The magnetic steel base is fixedly arranged at the end of the pump shaft, and the magnetic steel base rotates with the pump shaft;The sensor magnetic steel is fixedly arranged on the magnetic steel base;The encoder is arranged at the end of the pump shaft, and the position of the encoder corresponds to that of the sensor magnetic steel;A rotational speed sensor is arranged in the encoder, the encoder is at least used for receiving the signal of the magnetic pole change of the sensor magnetic steel, and the rotational speed sensor is at least used for detecting the rotational speed of the pump shaft.

[0006] Further, the magnetic steel base is connected at the end of the pump shaft by screw thread.

[0007] Further, the magnetic steel base is provided with a mounting groove, the sensor magnetic steel is arranged in the mounting groove, and the sensor magnetic steel is interference-fitted with the magnetic steel base.

[0008] Further, the end of the pump body is provided with a rear cover, and the encoder is fixed on the rear cover.

[0009] Further, the rear cover is provided with a sealing cover, and a sealed space is formed between the rear cover and the sealing cover.

[0010] Further, the electro -hydraulic motor pump further comprises a motor, and the motor is arranged inside the pump body.

[0011] Further, the driving end of the motor is connected with the pump shaft, and the driving end of the motor drives the pump shaft to rotate.

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

[0013] 1)The utility model provides a kind of integrated with speed sensor's electro-hydraulic motor pump, sensor magnet steel is fixedly arranged at the end of pump shaft, encoder is arranged at the end of the pump body, speed sensor is integrated in the encoder, the position of the encoder corresponds with sensor magnet steel, the speed of oil pump shaft rotation can be stably and accurately detected;

[0014] 2)The utility model provides a kind of integrated with speed sensor's electro-hydraulic motor pump, sensor magnet steel and encoder are arranged at the end of pump shaft and pump body, compact structure, do not affect the installation of electro-hydraulic motor pump itself, save installation space;

[0015] 3)The utility model provides a kind of integrated with speed sensor's electro-hydraulic motor pump, magnet steel seat is screw-connected at the end of pump shaft, the encoder is screw-connected on rear cover, so that installation and maintenance maintenance are convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0017] Figure 1 It is the whole structure schematic diagram of a kind of integrated with speed sensor's electro-hydraulic motor pump in a typical embodiment case of the utility model;

[0018] Figure 2 It is the partial structure schematic diagram of a kind of integrated with speed sensor's electro-hydraulic motor pump in a typical embodiment case of the utility model;

[0019] Mark explanation: 1, pump body;2, pump shaft;3, magnet steel seat;4, sensor magnet steel;5, motor;6, first screw;7, second screw;8, sealing cover;9, rear cover;10, encoder. DETAILED DESCRIPTION

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

[0021] As Figure 1 , Figure 2The utility model discloses an integrated with speed sensor's electro -hydraulic motor pump, this integrated with speed sensor's electro -hydraulic motor pump includes oil pump, magnetic steel seat 3, sensor magnetic steel 4 and encoder 10, the oil pump includes pump body 1 and pump shaft 2, pump shaft 2 sets up in pump body 1 inside and pump shaft 2 is rotatably connected with pump body 1, magnetic steel seat 3 is fixedly arranged in the end of pump shaft 2, and magnetic steel seat 3 rotates with pump shaft 2, preferably, in order to facilitate the disassembly magnetic steel seat 3, the magnetic steel seat 3 is connected through screw thread in the end of pump shaft 2.

[0022] Sensor magnetic steel 4 is fixedly arranged on magnetic steel seat 3, and specifically, the magnetic steel seat 3 is provided with a mounting groove, and the sensor magnetic steel 4 is arranged in the mounting groove, in order to prevent the sensor magnetic steel 4 from falling during the rotation of the pump shaft 2, the sensor magnetic steel 4 is interference fitted on the magnetic steel seat 3.

[0023] The encoder 10 is arranged at the end of the pump shaft 2, and the position of the encoder 10 corresponds to that of the sensor magnetic steel 4, the encoder 10 is provided with a speed sensor, and the encoder 10 is used at least for receiving signals of the magnetic pole change of the sensor magnetic steel 4, and the speed sensor is used at least for detecting the rotation speed of the pump shaft 2, the magnetic pole of the sensor magnetic steel 4 changes once every half rotation of the pump shaft 2, the sensor magnetic steel 4 has N and S poles after being magnetized, the magnetic pole changes twice every rotation of the pump shaft 2 of the oil pump, the number of changes is collected and recorded by the encoder 10 through the Hall effect of the magnetic field change, and is converted into the required speed parameter.

[0024] In some embodiments, the end of the pump body 1 is provided with a rear cover 9, and the encoder 10 is fixed on the rear cover 9.

[0025] Preferably, the rear cover 9 is provided with a sealing cover 8, a sealing space is formed between the rear cover 9 and the sealing cover 8, and the sealing cover is used for preventing dust, water vapor and impurities from entering the sealing space of the electric control work, so as to affect the working accuracy and service life of the electric control board. More preferably, an O-ring is arranged between the rear cover and the sealing ring, which can ensure that the working environment of the speed sensor electric control board is not affected by impurities and other external factors, so that the working detection is more accurate.

[0026] On the basis of the above, the electro -hydraulic motor pump further includes a motor 5, and the motor 5 is arranged in the pump body 1.

[0027] On the basis of the above, the driving end of the motor 5 is connected with the pump shaft 2, the driving end of the motor 5 drives the pump shaft 2 to rotate, and the motor 5 and the oil pump share the same pump shaft 2.

[0028] Working principle: the motor 5 rotates to drive the pump shaft 2 to rotate, the pump shaft 2 drives the magnetic steel base 3 and the sensor magnetic steel 4 to rotate, the encoder 10 collects and records the rotation times of the pump shaft 2 through the Hall effect of the magnetic field change, thereby converting into the required rotation speed parameter, and the rotation speed sensor detects the rotation speed of the pump shaft 2.

[0029] Embodiment 1:

[0030] An electro-hydraulic motor pump integrated with a rotation speed sensor, comprising a motor 5 and an oil pump, the oil pump comprising a pump body 1 and a pump shaft 2, the motor 5 and the pump shaft 2 being arranged inside the pump body 1, the pump shaft 2 being rotationally connected with the pump body 1, the driving end of the motor 5 being connected with the pump shaft 2, and the pump shaft 2 rotating under the driving of the motor 5; the end of the pump shaft 2 is provided with a magnetic steel base 3 connected through threads, the magnetic steel base 3 is provided with a mounting groove, the mounting groove is provided with a sensor magnetic steel 4, and the sensor magnetic steel 4 is interference-fitted with the magnetic steel base 3.

[0031] The end of the pump body 1 is fixedly connected with a rear cover 9, the rear cover 9 is provided with an encoder 10, and the encoder 10 is fixed on the rear cover 9 through a first screw 6; the encoder 10 corresponds in position to the sensor magnetic steel 4, and the encoder 10 is integrated with a rotation speed sensor.

[0032] The rear cover 9 is provided with a sealing cover 8, and the sealing cover 8 is fixed on the rear cover 9 through a second screw 7.

[0033] It should be understood that the above embodiment is only for illustrating the technical concept and characteristics of the present application, and its purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and it cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. An electrohydraulic motor pump integrated with a rotational speed sensor, characterized by: Comprising An oil pump comprising a pump body (1) and a pump shaft (2), the pump shaft (2) being arranged inside the pump body (1) and being rotationally connected with the pump body (1); A magnetic steel base (3) fixedly arranged at the end of the pump shaft (2), the magnetic steel base (3) rotating with the pump shaft (2); A sensor magnetic steel (4) fixedly arranged on the magnetic steel base (3); An encoder (10) arranged at the end of the pump shaft (2) and corresponding to the position of the sensor magnetic steel (4); the encoder (10) is provided with a rotating speed sensor, the encoder (10) is used for receiving at least the signal of the magnetic pole change of the sensor magnetic steel (4), and the rotating speed sensor is used for detecting at least the rotating speed of the pump shaft (2).

2. The electro-hydraulic motor pump integrated with a rotational speed sensor according to claim 1, characterized in that: The magnetic steel base (3) is threadedly connected at the end of the pump shaft (2).

3. The electro-hydraulic motor pump integrated with a rotational speed sensor according to claim 1, characterized in that: The magnetic steel base (3) is provided with a mounting groove, the sensor magnetic steel (4) is arranged in the mounting groove, and the sensor magnetic steel (4) is in interference fit with the magnetic steel base (3).

4. The electrohydraulic motor pump integrated with a rotational speed sensor according to claim 1, characterized in that: The end of the pump body (1) is provided with a rear cover (9), and the encoder (10) is fixed on the rear cover (9).

5. The electrohydraulic motor pump integrated with a rotational speed sensor according to claim 4, characterized in that: The rear cover (9) is provided with a sealing cover (8), and a sealed space is formed between the rear cover (9) and the sealing cover (8).

6. The electrohydraulic motor pump integrated with a rotational speed sensor according to claim 1, characterized in that: The electro-hydraulic motor pump further comprises a motor (5) arranged inside the pump body (1).

7. The electrohydraulic motor pump integrated with a rotational speed sensor according to claim 6, characterized in that: The driving end of the motor (5) is connected with the pump shaft (2), and the driving end of the motor (5) drives the pump shaft (2) to rotate.

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