Hydraulic motor speed measuring mechanism

Abstract

The utility model discloses a hydraulic motor speed measuring mechanism which comprises an oil passing disc, an oil distribution disc and a sensor, the sensor is an action sensor, the action sensor is installed on a wall body of the oil passing disc in a sealing mode, one end of the action sensor is arranged on a sensing face located in the oil passing disc, and the other end of the action sensor extends to the outside to be connected with a connector. The oil distribution disc is rotationally embedded in the side surface of the oil passing disc, and the sensing surface and one surface, arranged in the oil passing disc, of the oil distribution disc are oppositely arranged in a non-contact manner; and the oil distribution disc is arranged on one surface outside the oil passing disc and is rotationally connected with a crankshaft of the hydraulic motor. The motion sensor is arranged, the motion sensor and the oil distribution disc rotate in a non-contact mode to measure speed, meanwhile, the motion sensor cannot rotate, abrasion of the motion sensor is reduced, the service life of the motion sensor is prolonged, and safety of external personnel can be guaranteed; by arranging the combined gasket, sealing performance can be guaranteed, oil leakage is prevented, the structure is simple, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic motors, in particular to a hydraulic motor speed measuring mechanism. Background Art

[0002] Hydraulic motors are important power drive devices in industrial production. Hydraulic motors are generally equipped with speed measuring devices during the production process. However, axial-flow low-speed and high-torque hydraulic motors do not have speed measuring devices. However, as their application occasions become more and more extensive, some special occasions require that the speed of the hydraulic motor be known in a timely manner. Therefore, it is necessary to use a hydraulic motor speed measuring mechanism to obtain the required information.

[0003] For example, the utility model patent with patent number CN201520781986.0 discloses a hydraulic motor with a speed measuring device, including a housing, an oil pan and an oil distribution plate located in the oil pan and driven to rotate by the crankshaft, the rear part of the oil pan is detachably sealed with a connecting sleeve, the sensing rod passes through the inner hole of the connecting sleeve and the pressure chamber of the oil pan in turn and is connected to the rear part of the oil distribution plate, and an oil seal and a positioning sleeve are provided between the sensing rod and the inner hole wall of the connecting sleeve, which is characterized in that the oil seal and the positioning sleeve are arranged at intervals so that an oil accumulation chamber located between the oil seal and the positioning sleeve is formed in the connecting sleeve, and an oil discharge channel connecting the oil accumulation chamber with the inner cavity of the housing is opened in the oil pan and the connecting sleeve. In this hydraulic motor with a speed measuring device, when high-pressure oil enters the B chamber, even if there is oil leakage between the sensing rod and the connecting sleeve, the oil leaking into the oil accumulation chamber can be promptly directed into the housing through the oil discharge channel due to the existence of the oil discharge channel, and then discharged through the oil drain port. Therefore, this hydraulic motor with a speed measuring device can realize the function of bidirectional speed measurement, and is easy to manufacture and low in cost.

[0004] Although this hydraulic motor with a speed measuring device realizes the function of bidirectional speed measurement through the oil discharge channel, the sensor and the oil distribution plate in the device are mechanically connected. The rotation of the oil distribution plate will drive the external sensor to rotate, which will not only cause wear to the sensor during rotation and reduce its service life, but may also cause harm to outsiders during rotation. There are safety hazards and further improvements are needed. Utility Model Content

[0005] The purpose of the utility model is to provide a hydraulic motor speed measuring mechanism, aiming to improve the problem that the sensor and the oil distribution plate in the hydraulic motor speed measuring mechanism are mechanically connected, and the external sensor will be driven to rotate during the rotation of the oil distribution plate, which will not only cause wear of the sensor during the rotation process and reduce the service life, but may also cause harm to outsiders during the rotation process; there are safety hazards; and there are problems that need to be further improved.

[0006] The utility model is implemented as follows: a hydraulic motor speed measuring mechanism comprises an oil-passing pan, an oil distribution pan and a sensor, wherein the sensor is an action sensor, the action sensor is sealed and mounted on the wall of the oil-passing pan, one end of the action sensor is arranged on a sensing surface located inside the oil-passing pan, and the other end extends to the outside and is connected with a connector; the oil distribution pan is rotatably embedded in the side surface of the oil-passing pan, and the sensing surface and a side of the oil distribution pan arranged inside the oil-passing pan are relatively non-contactingly arranged; a side of the oil distribution pan arranged outside the oil-passing pan is rotatably connected to the crankshaft of the hydraulic motor.

[0007] Preferably, a threaded hole is provided on the wall of the oil pan, and the motion sensor is detachably mounted on the oil pan through the threaded hole.

[0008] Preferably, a combined gasket is further included. The motion sensor is sleeved with the combined gasket, and the combined gasket is used to seal the installation gap between the motion sensor and the oil pan.

[0009] Preferably, the surfaces corresponding to the oil pan and the sensing surface are provided with a plurality of U-shaped grooves, and the U-shaped grooves are arranged in sequence along the circumferential direction of the oil pan.

[0010] Preferably, the sensing surface and the oil distribution plate are arranged relatively parallel, the center of the sensing surface and the center of the oil distribution plate are arranged relatively eccentrically, and the eccentric distance does not exceed the length of the U-shaped groove.

[0011] Preferably, the connector is electrically connected to an end of the motion sensor extending to the outside, and the connector is electrically connected to an external control device.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model sets a motion sensor, and measures the speed by non-contact rotation of the motion sensor and the oil distribution plate. Meanwhile, the motion sensor does not rotate, thereby reducing the wear of the motion sensor, increasing the service life of the motion sensor, and ensuring the safety of external personnel.

[0014] 2. The utility model can ensure sealing and prevent oil leakage by arranging a combined gasket, has a simple structure and is easy to install.

[0015] 3. The utility model can perform high speed test with high accuracy by setting the motion sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the side of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the U-shaped groove of the utility model.

[0018] In the figure: 1. oil pan; 2. oil distribution plate; 201. U-shaped groove; 3. threaded hole; 4. motion sensor; 5. sensing surface; 6. combination gasket; 7. connector. DETAILED DESCRIPTION

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0021] Example 1

[0022] like Figure 1 and Figure 2As shown, a hydraulic motor speed measuring mechanism includes an oil pan 1, an oil distribution pan 2 and a sensor, wherein the sensor is a motion sensor 4, which is sealed and mounted on the wall of the oil pan 1, and a threaded hole 3 is provided on the wall of the oil pan 1, through which the motion sensor 4 is detachably mounted on the oil pan 1, and the motion sensor 4 is detachably mounted on the wall of the oil pan 1 through the threaded hole 3; and further includes a combined gasket 6, which is mounted on the motion sensor 4 and is used to seal the installation gap between the motion sensor 4 and the oil pan 1, The combined gasket 6 is used to seal the installation gap between the motion sensor 4 and the oil pan 1 to prevent the oil in the oil pan 1 from leaking out; one end of the motion sensor 4 is arranged on the sensing surface 5 located inside the oil pan 1, and the other end is extended to the outside and connected with a connector 7, the connector 7 is electrically connected to the end of the motion sensor 4 extending to the outside, the connector 7 is electrically connected to the external control device, the sensing surface 5 is used to detect the rotation speed of the oil pan 2, the connector 7 is used to connect to the external control device (PLC), and transmit the electrical signal of the motion sensor 4 to the external controller; The plate 2 is rotatably mounted on the side of the oil pan 1, the sensing surface 5 and the oil pan 2 are arranged on a side inside the oil pan 1 and are relatively non-contacting, the sensing surface 5 and the oil pan 2 are relatively parallel, the corresponding surfaces of the oil pan 1 and the sensing surface 5 are provided with a plurality of U-shaped grooves 201, the U-shaped grooves 201 are arranged in sequence along the circumferential direction of the oil pan 1, and the gap between the sensing surface 5 and the oil pan 2 is created by the U-shaped grooves 201, the center of the sensing surface and the center of the oil pan are relatively eccentrically arranged, and the eccentric distance does not exceed the length of the U-shaped groove, and the eccentric arrangement can make During the relative rotation of the sensing surface 5 and the oil distribution plate 2, there is a certain travel distance. When the action sensor 4 rotates through the U-shaped groove 201, the distance changes, causing the action sensor 4 to open and close, generating an electrical signal. During the operation of the motor, the oil distribution plate 2 rotates, and the sensing surface 5 triggers the switch when passing through several U-shaped grooves 201. Electrical signals are generated through continuous switching, and these signals are divided by the number of U-shaped grooves 201 to obtain the rotation speed; the oil distribution plate 2 is arranged on one side outside the oil pan 1 and is rotatably connected to the crankshaft of the hydraulic motor.

[0023] Example 2

[0024] like Figure 1 and Figure 2As shown, a hydraulic motor speed measuring mechanism comprises an oil pan 1, an oil distribution pan 2 and a sensor, wherein the sensor is a motion sensor 4, which is sealed and mounted on the wall of the oil pan 1, and a threaded hole 3 is arranged on the wall of the oil pan 1, through which the motion sensor 4 can be detachably mounted on the oil pan 1; in addition, a combined gasket 6 is also included, and the combined gasket 6 is mounted on the motion sensor 4, and the combined gasket 6 is used to seal the installation gap between the motion sensor 4 and the oil pan 1; one end of the motion sensor 4 is arranged on a sensing surface 5 located inside the oil pan 1, and the other end extends to the outside and is connected to a connector 7, and the connector The connector 7 is electrically connected to one end of the action sensor 4 extending to the outside, and the connector 7 is electrically connected to the external control device; the oil distribution plate 2 is rotatably embedded in the side of the oil-passing plate 1, and the sensing surface 5 and the oil distribution plate 2 are arranged on a side inside the oil-passing plate 1 and are relatively non-contacting, and the sensing surface 5 and the oil distribution plate 2 are relatively parallel, and the center of the sensing surface and the center of the oil distribution plate are relatively eccentric, and the surfaces corresponding to the oil-passing plate 1 and the sensing surface 5 are provided with a plurality of U-shaped grooves 201, and the U-shaped grooves 201 are arranged in sequence along the circumferential direction of the oil-passing plate 1; the oil distribution plate 2 is arranged on a side outside the oil-passing plate 1 and is rotatably connected to the crankshaft of the hydraulic motor.

[0025] The working principle of the utility model is as follows: the hydraulic motor and the oil distribution plate 2 are connected by crankshaft rotation, and then the hydraulic motor drives the oil distribution plate 2 to rotate. During the rotation of the oil distribution plate 2, the sensing surface 5 triggers the switch when passing through a number of U-shaped grooves 201, and an electrical signal is generated by continuous switching. The electrical signal is transmitted to the external control device through the connector 7 to process the signal, and the rotation speed is obtained by dividing it by the number of U-shaped grooves 201.

[0026] In summary, the utility model sets the motion sensor 4, and measures the speed by non-contact rotation of the motion sensor 4 and the oil distribution plate 2. At the same time, the motion sensor 4 does not rotate, which reduces the wear of the motion sensor 4, increases the service life of the motion sensor 4, and can ensure the safety of external personnel; by setting the combined gasket 6, the sealing can be ensured to prevent oil leakage, the structure is simple, and the installation is convenient; by setting the motion sensor 4, high-speed testing can be performed with high accuracy.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydraulic motor speed measuring mechanism, comprising an oil pan (1), an oil distribution pan (2) and a sensor, characterized in that: The sensor is an action sensor (4), which is sealed and mounted on the wall of the oil pan (1); one end of the action sensor (4) is provided with a sensing surface (5) located inside the oil pan (1), and the other end extends to the outside and is connected to a connector (7); the oil distribution plate (2) is rotatably mounted on the side of the oil pan (1); the sensing surface (5) and the oil distribution plate (2) are arranged on a side inside the oil pan (1) so as not to contact each other, and the sensing surface (5) and the oil distribution plate (2) are eccentrically arranged; the side of the oil distribution plate (2) arranged outside the oil pan (1) is rotatably connected to the crankshaft of the hydraulic motor.

2. A hydraulic motor speed measuring mechanism according to claim 1, characterized in that: A threaded hole (3) is provided on the wall of the oil pan (1), and the motion sensor (4) is detachably mounted on the oil pan (1) through the threaded hole (3).

3. A hydraulic motor speed measuring mechanism according to claim 2, characterized in that: In addition, it also includes a combined gasket (6). The motion sensor (4) is sleeved with the combined gasket (6). The combined gasket (6) is used to seal the installation gap between the motion sensor (4) and the oil pan (1).

4. A hydraulic motor speed measuring mechanism according to claim 1, characterized in that: The surfaces corresponding to the oil-passing pan (1) and the sensing surface (5) are provided with a plurality of U-shaped grooves (201), and the U-shaped grooves (201) are arranged in sequence along the circumferential direction of the oil-passing pan (1).

5. A hydraulic motor speed measuring mechanism according to claim 4, characterized in that: The sensing surface (5) and the oil distribution plate (2) are arranged relatively parallel, the center of the sensing surface (5) and the center of the oil distribution plate (2) are arranged relatively eccentrically, and the eccentric distance does not exceed the length of the U-shaped groove.

6. A hydraulic motor speed measuring mechanism according to claim 1, characterized in that: The connector (7) is electrically connected to an end of the motion sensor (4) extending to the outside, and the connector (7) is electrically connected to an external control device.

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