An electro-hydraulic pump with precisely positioned mounted encoder

Abstract

The utility model discloses an accurate positioning installation encoder's electro -hydraulic pump, including encoder chip, encoder PCB board, motor casing and control panel, the encoder chip is welded on the encoder PCB board, the encoder PCB board fixed connection is in the motor casing, be provided with motor shaft magnetic steel in the motor casing, the distance between the encoder chip and motor shaft magnetic steel is 1.5mm plus or minus 0.5mm, the control panel is connected with the encoder PCB board through floating connector, and the control panel is fixedly connected with the motor casing. The encoder chip is directly welded on the encoder PCB board, the encoder chip is close to motor shaft magnetic steel, improves the inductive accuracy of electro -hydraulic pump, the encoder PCB board is connected with control panel and adopts floating connector, compares with traditional wire harness connection, has improved the anti -interference ability, and has certain vibration -absorbing capacity, can guarantee the stability of whole machine operation.

Description

Technical Field

[0001] This utility model relates to an electro-hydraulic pump with a precise positioning encoder, belonging to the field of electro-hydraulic pump technology. Background Technology

[0002] As electro-hydraulic pump products iterate towards high-pressure, high-frequency response electro-hydraulic integration, the installation reliability and signal stability of their core component encoder have become key bottlenecks restricting the improvement of system performance. Existing designs have some encoders with poor sensing accuracy, insufficient anti-interference and vibration capabilities, and are prone to failure under vehicle operating conditions. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an electro-hydraulic pump with a high encoder sensing accuracy, strong anti-interference ability and strong vibration resistance, and a precise positioning and mounting encoder.

[0004] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:

[0005] An electro-hydraulic pump with a precisely positioned encoder includes an encoder chip, an encoder PCB board, a motor housing, and a control board. The encoder chip is soldered onto the encoder PCB board; the encoder PCB board is fixedly connected to the motor housing; a motor shaft magnet is provided inside the motor housing, and the distance between the encoder chip and the motor shaft magnet is 1.5mm ± 0.5mm; the control board is connected to the encoder PCB board via a floating connector, and the control board is fixedly connected to the motor housing.

[0006] Furthermore, the encoder chip is located at the center of the encoder PCB board so that the encoder chip is aligned with the center of the motor shaft magnet.

[0007] Furthermore, the motor housing is provided with at least two positioning posts, and the encoder PCB board is provided with positioning holes. The positions of the positioning holes correspond to the positions of the positioning posts, and the positioning posts extend into the positioning holes to position the encoder PCB board.

[0008] Furthermore, the encoder PCB board is fixedly connected to the motor housing by bolts.

[0009] Furthermore, the socket of the floating connector is soldered onto the encoder PCB board, and the plug of the floating connector is soldered onto the control board, with the socket and plug being plugged in.

[0010] Compared with the prior art, the advantages of this utility model include:

[0011] 1) The electro-hydraulic pump with precise positioning and encoder installation provided by this utility model has the encoder chip directly soldered onto the encoder PCB board. The encoder chip is close to the motor shaft magnet, which improves the sensing accuracy of the electro-hydraulic pump.

[0012] 2) The electro-hydraulic pump with precise positioning and encoder installation provided by this utility model has the encoder chip fixed at the center of the encoder PCB board, ensuring that the encoder chip is aligned with the center of the motor shaft magnet, which can further improve the sensing accuracy of the pump.

[0013] 3) The electro-hydraulic pump with precise positioning and encoder installation provided by this utility model uses a floating connector to connect the encoder PCB board and the control board. Compared with the traditional wire harness connection, the installation is more convenient and can also reduce the interference problem caused by excessively long wire harnesses. Compared with ordinary connector connection, the floating connector has a certain amount of movement in the XYZ direction, which increases the fault tolerance during mating installation. At the same time, it has a certain vibration absorption capacity during the operation of the whole machine, which can reduce some stress concentration and ensure the stability of the whole machine under long-term harsh working conditions. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a cross-sectional view of an electro-hydraulic pump with a precisely positioned encoder, provided in a typical embodiment of this utility model.

[0016] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0017] Figure 3 This is a schematic diagram of the connection between the encoder PCB board and the motor housing provided in a typical embodiment of this utility model;

[0018] Explanation of reference numerals in the attached diagram: 1. Encoder chip; 2. Encoder PCB board; 3. First bolt; 4. Motor housing; 5. Control board; 6. Floating connector; 7. Second bolt; 8. Positioning post. Detailed Implementation

[0019] In view of the shortcomings of the prior art, the inventor of this case, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.

[0020] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model discloses an electro-hydraulic pump with a precisely positioned encoder, including an encoder chip 1, an encoder PCB board 2, a motor housing 4, and a control board 5. The encoder chip 1 is soldered onto the encoder PCB board 2; the encoder PCB board 2 is fixedly connected to the motor housing 4. Specifically, the motor housing is provided with at least two positioning posts 8, and the encoder PCB board is provided with positioning holes. The positions of the positioning holes correspond to the positions of the positioning posts 8, and the positioning posts 8 extend into the positioning holes to position the encoder PCB board 2. This application, through a dual guarantee mechanism of positioning with positioning posts 8 and bolt fixing, can control the absolute position of the encoder chip 1 to remain unchanged during operation, effectively suppressing the risk of micro-displacement caused by motor operation, and enabling the encoder chip 1 to maintain stable sensing accuracy.

[0021] The motor housing 4 is provided with a motor shaft magnet 9. The encoder chip 1 is close to the motor shaft magnet 9. The distance between the encoder chip 1 and the motor shaft magnet 9 is 1.5mm ± 0.5mm, which can improve the magnetic induction accuracy. The distance between the encoder chip 1 and the motor shaft magnet 9 can be 1mm, 1.5mm or 2mm. In this embodiment, the distance between the encoder chip 1 and the motor shaft magnet 9 is 1.5mm.

[0022] Based on the above, in order to further improve the sensing accuracy of the encoder, the encoder chip 1 is placed at the center of the encoder PCB board 2 so that the encoder chip 1 is aligned with the center of the motor shaft magnet 9, thereby further improving the sensing accuracy of the encoder.

[0023] The control board 5 and the encoder PCB board 2 are connected via a floating connector 6. Specifically, the socket of the floating connector 6 is fixedly connected to the encoder PCB board 2, and the plug of the floating connector 6 is fixedly connected to the control board 5, with the socket and plug being inserted together. More specifically, the socket of the floating connector 6 is soldered to the encoder PCB board 2, and the plug of the floating connector 6 is soldered to the control board 5, with the socket and plug being inserted together during installation. Because the floating connector 6 has a certain amount of movement in the XYZ directions, it compensates for accumulated tolerances caused by design or manufacturing, improving installation fault tolerance and convenience. Simultaneously, during the operation of the entire machine, the floating connector 6 can absorb a certain amount of vibration energy, reducing the risk of failure under harsh working conditions and greatly improving product stability.

[0024] The control board 5 is fixedly connected to the motor housing 4. Specifically, the encoder PCB board 2 is fixedly connected to the motor housing 4 by the second bolt 7, which ensures the reliability of the entire encoder system.

[0025] Example 1:

[0026] An electro-hydraulic pump with a precisely positioned encoder includes an encoder chip 1, an encoder PCB board 2, a motor housing 4, and a control board 5. The encoder chip 1 is soldered onto a small encoder PCB board 2 via SMT. The encoder PCB board 2 has two positioning holes for mounting positioning posts 8 and two through holes for mounting first bolts. At the same time, two positioning posts 8 are also designed at corresponding positions on the motor housing. During installation, the encoder PCB board 2 is installed against the motor housing 4. The positioning posts 8 ensure that the encoder PCB board 2 does not move or shift during installation, improving the ease of installation. The installation of the first bolts 3 firmly fixes the encoder PCB board 2 to the housing. At the same time, by adjusting the design height of the mounting surface of the motor housing 4, the absolute position of the encoder chip 1 and its relative distance to the motor shaft magnet 9 are strictly controlled, indirectly ensuring the magnetic induction accuracy.

[0027] The socket of the floating connector 6 is soldered to the encoder PCB board 2, and the plug is soldered to the control board 5. During installation, the socket and plug of the floating connector 6 are inserted into each other to connect the encoder PCB board 2 and the control board 5. The control board 5 is tightened and fixed to the motor housing 4 with four bolts to ensure the stability of the control board 5.

[0028] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An electro-hydraulic pump with a precisely positioned encoder, characterized in that: include Encoder chip (1), said encoder chip (1) is soldered onto encoder PCB board (2); The motor housing (4) is fixedly connected to the encoder PCB board (2); a motor shaft magnet (9) is provided inside the motor housing (4), and the distance between the encoder chip (1) and the motor shaft magnet (9) is 1.5mm ± 0.5mm. The control board (5) is connected to the encoder PCB board (2) via a floating connector (6), and the control board (5) is fixedly connected to the motor housing (4).

2. The electro-hydraulic pump with a precisely positioned encoder according to claim 1, characterized in that: The encoder chip (1) is located at the center of the encoder PCB board (2) so that the encoder chip (1) is aligned with the center of the motor shaft magnet (9).

3. The electro-hydraulic pump with a precisely positioned encoder according to claim 1, characterized in that: The motor housing is provided with at least two positioning posts (8), and the encoder PCB board is provided with positioning holes. The position of the positioning holes corresponds to the position of the positioning posts (8), and the positioning posts (8) extend into the positioning holes to position the encoder PCB board (2).

4. The electro-hydraulic pump with a precisely positioned encoder according to claim 2, characterized in that: The encoder PCB board (2) is fixedly connected to the motor housing (4) by the first bolt (3).

5. An electro-hydraulic pump with a precisely positioned encoder as described in claim 2, characterized in that: The socket of the floating connector (6) is fixedly connected to the encoder PCB board (2), and the plug of the floating connector (6) is fixedly connected to the control board (5). The socket and the plug are plugged in.

6. The electro-hydraulic pump with a precisely positioned encoder according to claim 5, characterized in that: The socket of the floating connector (6) is soldered onto the encoder PCB board (2), and the plug of the floating connector (6) is soldered onto the control board (5). The socket and the plug are connected.

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