Digital display type oscillating cylinder

Abstract

The utility model relates to the technical field of oscillating cylinders, in particular to a digital display type oscillating cylinder which comprises an oscillating cylinder shell, a rotating shaft and an oscillating angle measuring device, the rotating shaft is rotatably installed in the oscillating cylinder shell, an end cover is arranged at the end of the rotating shaft and extends out of the oscillating cylinder shell, and the oscillating angle measuring device is arranged on the end cover. The outer edge of the end cover is matched with the opening of the oscillating cylinder shell, the oscillating angle measuring device comprises a magnetic railing ruler and a sensor, the magnetic railing ruler is fixedly arranged on the rotating shaft in a sleeving mode, the sensor comprises a railing ruler reading head and a controller, the railing ruler reading head is installed in the oscillating cylinder shell and located on the outer side of the magnetic railing ruler, the railing ruler reading head is electrically connected with the controller, and the controller is electrically connected with the magnetic railing ruler. The controller is installed on the swing cylinder shell and electrically connected with a display screen. According to the utility model, the accurate measurement and visual display of the swing angle of the swing cylinder are realized, the phenomena of radial run-out and axial play of the rotating shaft are avoided, and the stable operation of the swing cylinder is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of swing cylinders, and in particular relates to a digital display type swing cylinder. Background Art

[0002] At present, with the continuous advancement of mining technology and the growing demand for intelligence, the application scenarios of mining machinery are becoming more extensive and complex. In these scenarios, robots have gradually become indispensable key equipment due to their high efficiency, stability and ability to adapt to harsh environments. As the core component for performing operations, the performance of robot joints or mining manipulators directly determines the overall operation efficiency and quality.

[0003] Traditionally, the movement of robot joints or mining manipulators mainly relies on two structures: one is the servo motor driven gear rotation structure, and the other is the linear cylinder driven articulated robot arm structure. The servo motor driven gear rotation structure is known for its high flexibility and fast response speed. It is especially suitable for light or medium load applications, but its driving force and stability are often limited when faced with large load requirements. In contrast, the linear cylinder driven articulated robot arm structure can easily cope with large load challenges and demonstrates a strong carrying capacity. However, behind this advantage is the relatively large and complex mechanical structure, which not only increases the manufacturing cost and maintenance difficulty, but also limits the ability to deploy equipment in a compact space. Therefore, how to achieve miniaturization of the structure while maintaining a large load capacity has become a technical problem that needs to be solved urgently in the field of mining machinery.

[0004] To solve this problem, mining machinery introduced the hydraulic swing cylinder structure. With its compact design, strong load capacity and good durability, the hydraulic swing cylinder has been rapidly promoted in the field of mining machinery. However, while the hydraulic swing cylinder brings the above advantages, it also faces a new challenge: how to achieve precise control of the swing angle and precise execution of the action. Due to the nonlinear characteristics of the hydraulic system itself and the compressibility of the hydraulic oil, it is difficult to directly control the angle of the hydraulic swing cylinder accurately. To this end, the industry usually adopts the solution of connecting an encoder in series on the outside of the swing cylinder to monitor and record the swing angle of the cylinder body. These encoders accurately reflect the position change of the cylinder body by outputting electrical pulse signals, but the reception, processing and conversion of the signal into an easy-to-understand digital display reading require special receiving equipment and software algorithms, which undoubtedly increases the complexity and cost of the system. In addition, installing an encoder on the outside of the swing cylinder will increase the external dimensions of the swing cylinder, which may affect the overall layout and compactness of the equipment. Secondly, for a swing cylinder with axial movement, the installation of an encoder will generate axial force on the encoder, affecting the life of the encoder.

[0005] Therefore, we propose a digital display swing cylinder to solve the above technical problems. Utility Model Content

[0006] To solve the technical problems existing in the above-mentioned prior art, the present utility model proposes a digital display type swing cylinder.

[0007] The technical solution adopted by the present utility model is as follows:

[0008] A digital display type swing cylinder includes a swing cylinder housing, a rotating shaft, and a swing angle measuring device. The rotating shaft is rotatably installed in the swing cylinder housing. An end cover that can be connected to an axial load is provided at the end of the rotating shaft. The end cover extends outside the swing cylinder housing, and the outer edge of the end cover matches the opening of the swing cylinder housing. The swing angle measuring device includes a magnetic grating scale and a sensor. The magnetic grating scale is fixedly sleeved on the rotating shaft. The sensor includes a grating reading head and a controller. The grating reading head is installed in the swing cylinder housing and is located outside the magnetic grating scale for sensing the magnetic field change when the magnetic grating scale rotates. The grating reading head is electrically connected to the controller. The controller is installed on the swing cylinder housing, and the controller is electrically connected to a display screen.

[0009] In a further technical solution, a groove is formed inside the swing cylinder housing outside the magnetic grating scale, and the grating reading head is installed in the groove.

[0010] In a further technical solution, a plurality of clamping grooves are formed on the outer side of the rotating shaft, and sealing rings are installed in the clamping grooves. The sealing rings are in sealing contact with the inner wall of the swing cylinder housing.

[0011] In a further technical solution, a radial friction plate is further included. The radial friction plate is fixedly sleeved on the rotating shaft and is in radial contact with the swing cylinder housing.

[0012] In a further technical solution, the radial friction plate can be replaced with a journal bearing or a bearing.

[0013] In a further technical solution, an axial friction plate is further included. The axial friction plate is fixedly sleeved on the rotating shaft and is in axial contact with the swing cylinder housing.

[0014] In a further technical solution, a plurality of connecting screw holes are annularly arranged on the end cover.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0016] 1. Through the cooperative work of the magnetic grating scale and the sensor, the present utility model realizes the accurate measurement and display of the swing angle, enabling the operator to intuitively understand the working state of the swing cylinder, facilitating monitoring and adjustment, and providing strong support for accurately controlling the swing angle and precisely executing the action.

[0017] 2. Compared with the prior art method of installing additional measuring devices such as encoders on the outside of the swing cylinder, the utility model integrates the swing angle measuring device into the swing cylinder housing, which does not affect the external contour dimensions and installation dimensions of the swing cylinder and does not require excessive changes to components. It not only ensures the compactness and aesthetics of the equipment, but also does not require the configuration of special receiving equipment and software algorithms, thereby reducing the complexity and cost of the system and bringing users a more convenient and efficient use experience.

[0018] 3. The utility model effectively prevents the intrusion of external pollutants and avoids the risk of contamination of the magnetic scale by setting a sealing ring. This design ensures that the scale reading head and the magnetic scale always maintain a high degree of cleanliness and a stable working environment, which can not only extend the service life of the swing cylinder, but also improve the accuracy and reliability of the scale reading head when reading the magnetic scale signal.

[0019] 4. The utility model provides additional support and stability for the rotating shaft by setting radial friction plates and axial friction plates, especially when rotating at high speed or bearing heavy loads, which can effectively prevent radial runout and axial movement of the rotating shaft in the swing cylinder housing, thereby ensuring the stable operation of the swing cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0023] Figure markings: 1-swing cylinder housing, 2-rotating shaft, 3-end cover, 4-magnetic scale, 5-scale reading head, 6-controller, 7-display screen, 8-groove, 9-card slot, 10-sealing ring, 11-radial friction plate, 12-axial friction plate, 13-connecting screw hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 and Figure 2, the present utility model provides a digital display type oscillating cylinder, which includes an oscillating cylinder housing 1, a rotating shaft 2, and an oscillating angle measuring device. The rotating shaft 2 is rotatably installed in the oscillating cylinder housing 1. An end cover 3 that can be connected to an axial load is provided at the end of the rotating shaft 2. The end cover 3 extends outside the oscillating cylinder housing 1, and the outer edge of the end cover 3 matches the opening of the oscillating cylinder housing 1. The oscillating angle measuring device includes a magnetic grating scale 4 and a sensor. The magnetic grating scale 4 is fixedly sleeved on the rotating shaft 2. The sensor includes a grating reading head 5 and a controller 6. The grating reading head 5 is installed in the oscillating cylinder housing 1 and is located outside the magnetic grating scale 4, and is used to sense the magnetic field change when the magnetic grating scale 4 rotates. The grating reading head 5 is electrically connected to the controller 6. The controller 6 is installed on the oscillating cylinder housing 1, and the controller 6 is electrically connected to a display screen 7.

[0026] The digital display type oscillating cylinder realizes the precise control of the oscillating angle and the accurate execution of the action. Its working principle is mainly based on the cooperation of the magnetic grating scale 4 and the sensor, which can accurately measure the oscillating angle of the rotating shaft 2 and output it on the display screen 7 for the operator to refer to. Specifically, when the rotating shaft 2 rotates in the oscillating cylinder housing 1, the magnetic grating scale 4 fixedly sleeved on the rotating shaft 2 will also rotate accordingly. The magnetic grating scale 4 is a component that uses magnetic signals for measurement. The regular magnetic changes on its surface can form a series of magnetic poles, and these magnetic poles will generate a changing magnetic field during the rotation process. The grating reading head 5 in the sensor is installed outside the magnetic grating scale 4, and it can sense the magnetic field change generated when the magnetic grating scale 4 rotates and convert these changes into electrical signals. These electrical signals are then transmitted to the controller 6 that is electrically connected to the grating reading head 5. The controller 6 processes the received electrical signals. Through calculation and analysis, the oscillating angle of the rotating shaft 2 can be obtained. Of course, the oscillating angle information can also be read by connecting other devices to the controller 6 for convenient use. Finally, this angle information is displayed on the display screen 7 that is electrically connected to the controller 6, thus realizing the intuitive display of the oscillating angle. Through the above improved digital display type oscillating cylinder, the precise measurement and display of the oscillating angle are realized, enabling the operator to intuitively understand the working state of the oscillating cylinder, facilitating monitoring and adjustment, and providing strong support for the precise control of the oscillating angle and the accurate execution of the action. In addition, compared with the method of additionally installing a measuring device such as an encoder outside the oscillating cylinder in the prior art, by integrating the oscillating angle measuring device inside the oscillating cylinder housing 1, the external contour size and installation size of the oscillating cylinder are not affected, and there is no need to modify too many components. This not only ensures the compactness and aesthetics of the equipment, but also does not require the configuration of special receiving devices and software algorithms, reducing the complexity and cost of the system and bringing a more convenient and efficient use experience to users.

[0027] It is worth mentioning that in addition to the option of using the magnetic scale 4 as the component to be measured, the optical scale can also achieve the task of measuring the swing angle. In order to cooperate with the use of the optical scale, an additional light source is required, which will emit light to illuminate the scale portion of the optical scale. Correspondingly, the scale reading head 5 will also be adaptively changed to a type specifically used to read the optical scale signal, and its installation position will be on the opposite side of the light source to ensure that the light signal reflected or transmitted on the optical scale can be accurately captured. This design provides operators with a more flexible choice space, allowing operators to flexibly choose the magnetic scale 4 or the optical scale as the component to be measured according to actual application scenarios and needs, thereby further optimizing the measurement effect and adapting to different working environments.

[0028] In a specific embodiment, see Figure 2 A groove 8 is provided inside the swing cylinder housing 1 on the outside of the magnetic scale 4 , and the scale reading head 5 is installed in the groove 8 .

[0029] By providing a groove 8 inside the swing cylinder housing 1 for accommodating the scale reading head 5, not only the scale reading head 5 can be protected and the service life of the scale reading head 5 can be increased, but also the compactness of the device can be further improved.

[0030] In a specific embodiment, see Figure 1 and Figure 2 Two slots 9 are provided on the outer side of the rotating shaft 2 , and sealing rings 10 are installed in both slots 9 . The sealing rings 10 are in sealing contact with the inner wall of the swing cylinder housing 1 .

[0031] The setting of the sealing ring 10 effectively prevents the intrusion of external pollutants (such as water, mud, oil, dust, etc.), and avoids the risk of contamination of the magnetic scale 4. This design ensures that the scale reading head 5 and the magnetic scale 4 always maintain a high degree of cleanliness and a stable working environment, which can not only extend the service life of the swing cylinder, but also improve the accuracy and reliability of the scale reading head 5 when reading the signal of the magnetic scale 4.

[0032] In a specific embodiment, see Figure 1 and Figure 2 , and also includes a radial friction plate 11, which is fixedly sleeved on the rotating shaft 2 and abuts against the swing cylinder housing 1 in the radial direction.

[0033] The radial friction plate 11 provides additional support and stability for the rotating shaft 2 in the radial direction. Especially when rotating at high speed or bearing a large load, the radial friction plate 11 can effectively prevent the radial runout of the rotating shaft 2 in the swing cylinder housing 1, thereby ensuring the stable operation of the swing cylinder.

[0034] In a specific embodiment, see Figure 1 and Figure 2 , and also includes an axial friction plate 12, which is fixedly sleeved on the rotating shaft 2 and abuts against the swing cylinder housing 1 in the axial direction.

[0035] The arrangement of the axial friction plate 12 provides additional support and stability for the rotating shaft 2 in the axial direction, and can effectively prevent the axial movement of the rotating shaft 2 in the swing cylinder housing 1, especially when rotating at high speed or bearing a large load, thereby ensuring the stable operation of the swing cylinder.

[0036] In a specific implementation, the radial friction plate 11 can be replaced by a bearing.

[0037] If space permits, the radial friction plate 11 can be replaced with a bearing or a bushing, which can also prevent the radial runout of the rotating shaft 2 in the swing cylinder housing 1 and ensure the stable operation of the swing cylinder. Similarly, if space permits, the axial friction plate 12 can also be replaced with a bearing or a bushing to achieve a similar stabilizing effect. Such a replacement solution not only maintains the stability of the swing cylinder, but also provides better performance and longer service life.

[0038] In a specific embodiment, see Figure 1 The end cover 3 is provided with a plurality of connecting screw holes 13 arranged in a ring shape.

[0039] Through the annularly arranged connecting screw holes 13 on the end cover 3, a stable flange connection can be made with the axial load, ensuring that the axial load can be stably and effectively transmitted to the swing cylinder, thereby meeting the load requirements of the equipment during operation.

[0040] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A digital display type oscillating cylinder, characterized in that, It includes a swing cylinder housing (1), a rotating shaft (2), and a swing angle measuring device. The rotating shaft (2) is rotatably installed inside the swing cylinder housing (1). An end cover (3) that can be connected to an axial load is provided at the end of the rotating shaft (2). The end cover (3) extends outside the swing cylinder housing (1), and the outer edge of the end cover (3) matches the opening of the swing cylinder housing (1). The swing angle measuring device includes a magnetic grating ruler (4) and a sensor. The magnetic grating ruler (4) is fixedly sleeved on the rotating shaft (2). The sensor includes a grating head (5) and a controller (6). The grating head (5) is installed inside the swing cylinder housing (1) and is located outside the magnetic grating ruler (4) for sensing the magnetic field change when the magnetic grating ruler (4) rotates. The grating head (5) is electrically connected to the controller (6). The controller (6) is installed on the swing cylinder housing (1), and the controller (6) is electrically connected to a display screen (7).

2. The digital display type oscillating cylinder according to claim 1, characterized in that, A groove (8) is formed inside the swing cylinder housing (1) outside the magnetic grating ruler (4), and the grating head (5) is installed in the groove (8).

3. The digital display type oscillating cylinder according to claim 1, characterized in that, A plurality of clamping grooves (9) are formed on the outer side of the rotating shaft (2), and sealing rings (10) are installed in the clamping grooves (9). The sealing rings (10) are in sealing contact with the inner wall of the swing cylinder housing (1).

4. A digital display type oscillating cylinder according to claim 1, characterized in that, It further includes a radial friction plate (11). The radial friction plate (11) is fixedly sleeved on the rotating shaft (2) and is in radial contact with the swing cylinder housing (1).

5. A digital display type oscillating cylinder according to claim 4, characterized in that, The radial friction plate (11) can be replaced with a bearing bush or a bearing.

6. A digital display type oscillating cylinder according to claim 1, wherein, It further includes an axial friction plate (12). The axial friction plate (12) is fixedly sleeved on the rotating shaft (2) and is in axial contact with the swing cylinder housing (1).

7. A digital display type oscillating cylinder according to claim 1, characterized in that, A plurality of connecting screw holes (13) are arranged annularly on the end cover (3).

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