CN214792975U

CN214792975U - Swing angle sensor and hydraulic equipment

Info

Publication number: CN214792975U
Application number: CN202022448548.6U
Authority: CN
Inventors: 邹云璐; 李厚德
Original assignee: Bosch Rexroth Beijing Hydraulic Co Ltd
Current assignee: Bosch Rexroth Beijing Hydraulic Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-11-19
Anticipated expiration: 2030-10-29

Abstract

The application provides a swing angle sensor and hydraulic equipment. This pivot angle sensor includes: the probe comprises a magnetic probe and a first flow blocking part, wherein the magnetic probe comprises a magnet for generating a magnetic signal and the first flow blocking part is used for blocking the magnet from contacting with fluid; and an electrical signal probe; the magnetic measuring head is used for calculating the swing angle of the magnetic measuring head according to the electric signal generated by the change of the magnetic signal; wherein the electrical signal probe is axially spaced apart from the magnet of the magnetic probe by a first gap. Through the arrangement of the first flow blocking part, when the swing angle sensor is installed in a fluid-immersed environment, the resistance of fluid flowing through the magnet of the magnetic measuring head of the swing angle sensor can be increased, so that the flowing process is blocked, the possibility that metal impurities carried by the fluid are adsorbed by the magnet when flowing through is further reduced, and the reliability and the service life of the swing angle sensor are improved.

Description

Swing angle sensor and hydraulic equipment

Technical Field

The present application relates to the field of hydraulic equipment, and more particularly, to a swash plate rotation angle sensor for a pump block component or a motor component within the hydraulic equipment.

Background

Hydraulic drive systems have a wide range of applications where movement causes a change in the volume of a pump chamber, thereby compressing fluid to impart pressure energy to the fluid to transmit power and movement. As one of its components, a hydraulic motor or a hydraulic pump is an actuating component of a hydraulic transmission system, which includes a hydraulic cylinder, a port plate, and the like. The hydraulic cylinder or the rotary component is used for providing a volume change space of the compressed fluid, and the port plate is used for realizing the distribution input and output of the hydraulic fluid. During the normal working process, the hydraulic cylinder rotates relative to the port plate, and during the oil inlet period, the axial through hole rotates to be aligned with the oil inlet through hole of the port plate, so that hydraulic oil enters the axial through hole; during oil discharge, the axial through hole therein is rotated into alignment with the oil outlet through hole of the port plate, and the plunger is driven by the drive shaft to press hydraulic oil out of the axial through hole, thereby achieving one working cycle.

In order to master the rotation of the components of the hydraulic transmission system and know the state of the equipment, a swing angle sensor is usually provided for the hydraulic equipment. Such yaw angle sensors typically include a magnetic probe with a magnet. After the hydraulic system runs for a period of time, metal debris may be carried in the hydraulic fluid in the hydraulic system, and when the fluid flows through the magnetic measuring head of the swing angle sensor, the carried metal debris is easily adsorbed on the magnet of the magnetic measuring head, so that the electromagnetic signal output by the magnetic measuring head is influenced, the swing angle measured by the swing angle sensor is influenced, and finally the swing angle parameter obtained by the whole hydraulic transmission system and the corresponding control provided are influenced.

Disclosure of Invention

The present application aims to provide an improved yaw angle sensor and hydraulic apparatus whereby at least one of the problems of the prior art can be effectively solved or alleviated.

According to an aspect of the present application, there is provided a swing angle sensor including: the probe comprises a magnetic probe and a first flow blocking part, wherein the magnetic probe comprises a magnet for generating a magnetic signal and the first flow blocking part is used for blocking the magnet from contacting with fluid; and an electrical signal probe; the magnetic measuring head is used for calculating the swing angle of the magnetic measuring head according to the electric signal generated by the change of the magnetic signal; wherein the electrical signal probe is axially spaced apart from the magnet of the magnetic probe by a first gap.

According to another aspect of the present application, there is provided a hydraulic apparatus comprising: a hydraulic body including a housing having a mounting through-hole; the swing angle sensor is provided with an electric signal measuring head arranged on the outer side of the shell and a magnetic measuring head arranged on the inner side of the shell; wherein the magnetic stylus includes a magnet for generating a magnetic signal; the electric signal measuring head is used for calculating a swing angle of the magnetic measuring head according to an electric signal generated by the change of the magnetic signal, extends into the shell through the mounting through hole, and is axially spaced from the magnet of the magnetic measuring head by a first gap; and a second flow blocking portion for blocking the magnet from contacting the fluid within the hydraulic body.

According to the swing angle sensor and the hydraulic equipment, through the arrangement of the first flow blocking portion, when the swing angle sensor is installed in a fluid-infiltrated environment, the resistance of fluid flowing through the magnet of the magnetic measuring head of the swing angle sensor can be increased, so that the flowing process is blocked, the possibility that metal impurities carried by the fluid are adsorbed by the magnet when flowing is further reduced, and the reliability and the service life of the swing angle sensor are improved.

Drawings

The present application will be more fully understood from the detailed description given below with reference to the accompanying drawings, in which like reference numerals refer to like elements in the figures. Wherein:

FIG. 1 is a perspective schematic view of one embodiment of a swing angle sensor.

Fig. 2 is a cut-away schematic view of an embodiment of the yaw angle sensor of fig. 1.

FIG. 3 is a partially cut-away schematic view of another embodiment of a yaw angle sensor.

FIG. 4 is a schematic view, partially in section, of yet another embodiment of a yaw angle sensor.

Fig. 5 is an exploded schematic view of one embodiment of the hydraulic equipment showing the mounting position of the magnetic probe of the yaw angle sensor.

Fig. 6 is a schematic diagram of an embodiment of the hydraulic equipment, showing the mounting position of the electrical signal probe of the swing angle sensor.

FIG. 7 is a schematic view, partially in section, of another embodiment of a hydraulic rig.

Detailed Description

First, it should be noted that the composition, operation principle, features, advantages, etc. of the swing angle sensor and the hydraulic equipment according to the present application will be described below by way of example, but it should be understood that all the descriptions are given for illustration only and thus should not be construed as forming any limitation to the present application. In this document, the technical term "connected" and its derivatives cover that one component is directly connected to another component and/or indirectly connected to another component. And the use of the verb "to comprise" is herein intended to mean two or more than two, as opposed to "a" or "an".

Furthermore, to any single feature described or implicit in an embodiment or shown or implicit in the drawings, the present application still allows any combination or permutation to continue between the features (or their equivalents) without any technical impediment, thereby achieving more other embodiments of the present application that may not be directly mentioned herein.

Referring to fig. 1-6, different embodiments of the present invention for a yaw angle sensor with different flow blocking portions are shown, respectively. Wherein fig. 1 to 2 show a yaw angle sensor with a first spoiler wall; FIG. 3 illustrates a yaw angle sensor with a fluid blocking layer; and figure 4 shows a yaw angle sensor with a sealing ring. In general, such yaw angle sensors have the following structural commonality: which includes a magnetic stylus 120 for generating a magnetic signal and a wobble electrical signal stylus 110 for calculating the magnetic stylus 120 from an electrical signal generated by a change in the magnetic signal. Wherein, this signal of telecommunication gauge head 110 includes: a sensor body 111 for generating an angle signal; a substrate 113 for protecting the sensor body 111 from being damaged; and a support column 112 supported between the sensor body 111 and the substrate 113. The three are integrally mounted by mounting bolts 115 and are mounted together in the operating position (e.g., on the hydraulic pump housing). At this time, the sensor body 111 is installed at a side closer to the hydraulic pump housing, and the substrate 113 is disposed at a side relatively close to the outside, thereby preventing disturbance or damage of the sensor body 111 due to external dust or impact, etc. Further, the sensor body 111 has an O-ring 114 thereon to provide sufficient sealing performance when it is subjected to a piercing type mounting. The magnetic measuring head 120 comprises a position generator 125 which provides the pivot angle by means of a varying magnetic field signal and has a magnet 121 for generating a magnetic field and a plastic housing surrounding the magnet. The magnetic probe 120 further comprises a mounting plate arranged on the side of the position generator 125, which is positioned and mounted relative to the hydraulic pump housing by means of positioning pins 127 and mounting bolts 126. In order to transmit the signal, the electrical signal probe 110 is axially spaced apart from the magnet 121 of the magnetic probe 120 by a first gap G. In addition, the magnetic probe 120 further includes a first flow blocking portion that blocks the magnet 121 from contacting the fluid; it can be configured into various structural forms as long as the fluid in the working environment of the swing angle sensor can be blocked. Through the arrangement of the first flow blocking part, when the swing angle sensor is installed in a fluid-immersed environment, the resistance of fluid flowing through the magnet of the magnetic measuring head of the swing angle sensor can be increased, so that the flowing process is blocked, the possibility that metal impurities carried by the fluid are adsorbed by the magnet when flowing is further reduced, and the reliability and the service life of the swing angle sensor are improved.

According to the inventive concept and the resulting technical effect of the embodiments of the present application, it should be noted that the term "blocking" herein does not require that the fluid is isolated from contact with the magnet, and may mean increasing the resistance of the fluid flowing through the magnet, slowing it down several times before passing through the magnet, settling the carried debris, or blocking a portion of the debris by the first flow-blocking portion. These fall within the scope of the blocking action of the chokes mentioned in the present application. The first flow-blocking portion in each embodiment will be described below with reference to different drawings in order to more clearly understand the flow-blocking purpose thereof.

Referring to fig. 1 to 2, the illustrated first flow blocking portion includes a first flow blocking wall 122 extending from the outer circumference of the magnetic probe 120 in the axial direction, and the magnet 121 is surrounded by the first flow blocking wall 122; the electrical signal probe 110 extends into the first spoiler 122, and the width of the first gap G is not greater than the height of the first spoiler 122. At this time, the fluid flowing through the first gap G is first blocked and decelerated by the first flow blocking wall 122, so that the metal debris carried by the fluid is settled due to the reduction of the flow velocity or is blocked by the flow blocking wall, thereby reducing the possibility that the metal debris carried by the hydraulic fluid flows through the magnet and is adsorbed by the magnet.

Turning to fig. 3, the illustrated first flow blocking portion includes a flow blocking layer 123 having a thickness no greater than a first gap G (e.g., 1 mm) disposed on the magnet 121. The current blocking layer will directly avoid the possibility of metal debris coming into contact with the magnet and being attracted. As a specific implementation form, the blocking layer 123 may be a plastic layer disposed on the magnet 121 by coating or the like. The scheme has lower process cost and is easy to realize.

Referring next to fig. 4, the illustrated first flow blocking portion includes a sealing ring 124 disposed about the electrical signal probe 110 and/or the magnetic probe 120, the sealing ring 124 configured to seal the first gap G circumferentially. The seal ring 124 also directly avoids the possibility of metal debris coming into contact with the magnet and being attracted. As a specific implementation, the sealing ring 124 may be tightly fitted to either or both of the electrical signal probe 110 and the magnetic probe 120; the sealing ring 124 may also be bonded to either or both of the electrical signal probe 110 and the magnetic probe 120. The scheme has small change on the existing swing angle sensor, can be realized by directly adding the sealing ring 124, and has better applicability and application range on the existing sensor parts.

Referring again to fig. 5-7, the present application also provides an embodiment of a hydraulic apparatus, such as a hydraulic pump or a swash plate variable displacement hydraulic motor, in conjunction with the drawings. The hydraulic equipment includes a hydraulic body 210 and a swing angle sensor 100. Wherein the hydraulic body 210 includes a housing 211 having a mounting through-hole 211 a; the pivot angle sensor 100 includes an electrical signal probe 110 disposed outside the housing 211 and a magnetic probe 120 disposed inside the housing 211. Wherein, the magnetic measuring head 120 of the swing angle sensor 100 comprises a magnet 121 for generating a magnetic signal; the electrical signal probe 110 is used for calculating the swing angle of the magnetic probe 120 according to the electrical signal generated by the change of the magnetic signal, and the electrical signal probe 110 extends into the housing 211 through the mounting through hole 211a and is axially spaced from the magnet 121 of the magnetic probe 120 by a first gap G. The hydraulic equipment also includes a second flow-impeding portion that may be used to block the magnet 121 from contacting the fluid within the hydraulic body 210. Certainly, as a specific implementation manner, the installed tilt angle sensor may be the tilt angle sensor in any of the foregoing embodiments or a combination thereof, and at this time, the second flow blocking portion may further include the first flow blocking portion of the tilt angle sensor 100, so that corresponding technical effects are also provided, and details are not described herein again. In addition, even if the swing angle sensor in the above-mentioned embodiment is not adopted, due to the existence of the second flow blocking portion, when the swing angle sensor is installed in a fluid-immersed environment, the resistance of the fluid flowing through the magnet of the magnetic measuring head of the swing angle sensor can be increased, so that the flowing process is blocked, the possibility that metal impurities carried by the fluid are adsorbed by the magnet when flowing is reduced, and the reliability and the service life of the swing angle sensor are improved.

Specifically, referring to fig. 7, the illustrated second choke portion includes a second choke wall 212 extending and protruding from the inside of the housing 211, the second choke wall 212 being provided around the magnetic probe 120; the electrical signal probe 110 projects into the second spoiler 212, and the width of the first gap G is not greater than the height of the second spoiler 212. At this time, the fluid flowing through the first gap G is first blocked and decelerated by the second flow-blocking wall 212, so that the metal debris carried by the fluid is settled due to the reduction of the flow velocity or is blocked by the flow-blocking wall, thereby reducing the possibility that the metal debris carried by the hydraulic fluid flows through the magnet and is adsorbed by the magnet.

It should be appreciated that, under the teachings of the present invention, the second flow-obstructing portion and the first flow-obstructing portion may be used alternatively, or may be used in combination of all or part of them, and further have the effects of better obstructing the fluid, cost-effectiveness considerations, applicability considerations, and the like.

The above detailed description is merely illustrative of the present application and is not intended to be limiting. In the present application, relative terms such as left, right, up, and down are used to describe relative positional relationships, and are not intended to limit absolute positions. Various changes and modifications can be made by one skilled in the art without departing from the scope of the present application, and all equivalent technical solutions also belong to the scope of the present application, and the protection scope of the present application should be defined by the claims.

Claims

1. A yaw angle sensor, comprising:

a magnetic stylus (120) comprising a magnet (121) for generating a magnetic signal and a first flow-impeding portion that impedes contact of the magnet (121) with a fluid; and

an electrical signal probe (110); the swinging angle of the magnetic measuring head (120) is calculated according to the electric signal generated by the change of the magnetic signal;

wherein the electrical signal probe (110) is axially spaced apart from the magnet (121) of the magnetic probe (120) by a first gap (G).

2. The yaw angle sensor according to claim 1, characterized in that the first flow blocking portion comprises a first flow blocking wall (122) extending in an axial direction from an outer periphery of the magnetic probe (120), the magnet (121) being surrounded by the first flow blocking wall (122); wherein the electrical signal probe (110) projects into the first spoiler wall (122), and wherein the width of the first gap (G) is not greater than the height of the first spoiler wall (122).

3. The yaw angle sensor according to claim 1, characterized in that the first flow-impeding portion comprises a flow-impeding layer (123) arranged on the magnet (121) with a thickness not greater than the first gap (G).

4. The yaw angle sensor according to claim 3, characterized in that the flow blocking layer (123) is a plastic layer provided on the magnet (121).

5. The yaw angle sensor according to claim 1, characterized in that the first flow prevention portion comprises a sealing ring (124) arranged around the electrical signal probe (110) and/or the magnetic probe (120), the sealing ring (124) being configured to seal the first gap (G) in a circumferential direction.

6. The yaw angle sensor according to claim 5, characterized in that the sealing ring (124) is a tight fit with the electrical signal probe (110) and/or the magnetic probe (120); or the sealing ring (124) is bonded to the electrical signal probe (110) and/or the magnetic probe (120).

7. A hydraulic rig, comprising:

a hydraulic body (210) including a housing (211) having a mounting through-hole (211 a); and

a pivot angle sensor (100) having an electrical signal probe (110) disposed outside the housing (211) and a magnetic probe (120) disposed inside the housing (211); wherein the magnetic stylus (120) comprises a magnet (121) for generating a magnetic signal; the electric signal measuring head (110) is used for calculating a swing angle of the magnetic measuring head (120) according to an electric signal generated by the change of the magnetic signal, and the electric signal measuring head (110) extends into the shell (211) through the mounting through hole (211 a) and is axially spaced from the magnet (121) of the magnetic measuring head (120) by a first gap (G); and

a second flow blocking portion for blocking the magnet (121) from contacting the fluid within the hydraulic body (210).

8. The hydraulic equipment according to claim 7, characterized in that said second flow-obstructing portion comprises a second flow-obstructing wall (212) extending from the inside of said casing (211), said wall being arranged around said magnetic feeler (120); wherein the magnetic feeler (120) projects into the second spoiler wall (212), and wherein the width of the first gap (G) is not greater than the height of the second spoiler wall (212).

9. Hydraulic equipment according to claim 7 or 8, characterized in that the hydraulic equipment (200) is a swash plate variable displacement hydraulic pump or a hydraulic motor.

10. A hydraulic rig, comprising:

a hydraulic body (210) including a housing (211) having a mounting through-hole (211 a);

a yaw angle sensor (100) configured as the yaw angle sensor (100) of any one of claims 1 to 6; the swing angle sensor (100) is provided with the electric signal measuring head (110) arranged on the outer side of the shell (211) and the magnetic measuring head (120) arranged on the inner side of the shell (211), and the electric signal measuring head (110) extends into the shell (211) through the mounting through hole (211 a); and

a second flow blocking portion for blocking the magnet (121) from contacting the fluid inside the hydraulic body (210);

wherein the second flow-blocking portion includes the first flow-blocking portion in the yaw angle sensor (100).