Hydraulic cylinder with stroke detection function

Abstract

The utility model provides a hydraulic cylinder with a stroke detection function, and relates to the technical field of hydraulic cylinders. Two connecting frames are fixedly installed outside the hydraulic cylinder, and stroke sensors are installed in the connecting frames. A connecting rod is installed in a piston rod of the hydraulic cylinder, nuts are connected to the two ends of the connecting rod, one nut makes contact with the piston rod of the hydraulic cylinder, and the other nut makes contact with the stroke sensor. A cleaning ring is mounted outside the hydraulic cylinder; the outer end of a piston rod of the hydraulic cylinder is connected with a threaded head, the piston rod of the hydraulic cylinder is sleeved with a limiting sleeve, and the limiting sleeve makes contact with the threaded head. When the piston rod of the hydraulic cylinder moves, the piston rod drives the movable rod of the stroke sensor to move through the connecting rod, the stroke sensor has a detection effect on the moving stroke of the piston rod of the hydraulic cylinder, and the stroke sensor can serve as analog output, switch output or IO-Link process data and is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a stroke detection function. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. When it is used to achieve reciprocating motion, the reduction device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides. The hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device.

[0003] There are two types of built-in stroke detection devices currently used in existing hydraulic cylinders, one is a magnetostrictive linear displacement sensor, and the other is a wire rope built-in stroke detection device. Both built-in stroke detection devices are not only large in appearance, but also complicated in installation process and inconvenient to use. Utility Model Content

[0004] The present invention relates to a hydraulic cylinder with a stroke detection function, which solves the problem that there are two types of built-in stroke detection devices used in existing hydraulic cylinders, one is a magnetostrictive linear displacement sensor, and the other is a wire rope built-in stroke detection device. The two built-in stroke detection devices are not only large in appearance, but also complicated in installation process and inconvenient to use.

[0005] In a first aspect of the present disclosure, a hydraulic cylinder with a stroke detection function is provided, specifically comprising: a hydraulic cylinder; two connecting frames are fixedly installed on the outside of the hydraulic cylinder, and a stroke sensor is installed inside the connecting frame; a connecting rod is installed inside the piston rod of the hydraulic cylinder, and nuts are connected at both ends of the connecting rod, one of the nuts is in contact with the piston rod of the hydraulic cylinder, and the other nut is in contact with the stroke sensor; a cleaning ring is installed on the outside of the hydraulic cylinder; a threaded head is connected to the outer end of the piston rod of the hydraulic cylinder, and a limiting sleeve is sleeved on the outside of the piston rod of the hydraulic cylinder, and the limiting sleeve is in contact with the threaded head.

[0006] Furthermore, the stroke sensor is fixedly connected to the cylinder body of the hydraulic cylinder through a connecting frame, a connecting hole is provided in the piston rod of the hydraulic cylinder, one end of the connecting rod is connected to the connecting hole, and the other end of the connecting rod is connected to the end of the movable rod of the stroke sensor. When the piston rod of the hydraulic cylinder moves, the piston rod drives the movable rod of the stroke sensor to move through the connecting rod, and the stroke sensor has a detection effect on the movement stroke of the piston rod of the hydraulic cylinder.

[0007] Furthermore, the support frame is fixedly connected to the cylinder body of the hydraulic cylinder, and a cleaning ring is installed on the inner side of the support frame. The inner diameter of the cleaning ring is equal to the outer diameter of the piston rod of the hydraulic cylinder. The piston rod of the hydraulic cylinder passes through the cleaning ring. During the movement of the piston rod of the hydraulic cylinder, the dust and impurities attached to the piston rod are cleaned by the cleaning ring.

[0008] Furthermore, a slot is provided at one end of the threaded head, and the end of the piston rod of the hydraulic cylinder is inserted into the slot. A clamping block is provided at the end of the piston rod of the hydraulic cylinder, and a connecting groove is provided outside the slot. The connecting groove is L-shaped, and the clamping block is connected to the connecting groove. The piston rod of the hydraulic cylinder is connected to the threaded head by clamping. Threaded heads of different lengths can be replaced according to the different distances between the required installation position of the hydraulic cylinder and the required driving components.

[0009] Furthermore, the limiting sleeve is slidably connected to the outside of the piston rod of the hydraulic cylinder, a guide block is provided on the outside of the piston rod of the hydraulic cylinder, a movable hole is provided in the limiting sleeve, and the guide block is slidably connected to the movable hole.

[0010] Furthermore, an insert block is provided outside the limiting sleeve, and the insert block is inserted into the connecting groove.

[0011] Furthermore, a spring is mounted on the outside of the piston rod of the hydraulic cylinder, one end of the spring is in contact with the limit sleeve, and the other end of the spring is in contact with the piston rod of the hydraulic cylinder. When the blocking block moves to the innermost end of the connecting groove, the limit sleeve moves under the influence of the spring thrust, so that the insert block is inserted into the connecting groove, thereby limiting the threaded head.

[0012] The utility model provides a hydraulic cylinder with a stroke detection function, which has the following beneficial effects:

[0013] When the utility model is in use, when the piston rod of the hydraulic cylinder moves, the piston rod drives the movable rod of the stroke sensor to move through the connecting rod, and the movement stroke of the piston rod of the hydraulic cylinder is detected by the stroke sensor. The stroke sensor can be used as analog output, switch output or IO-Link process data, which is easy to use. During the movement of the piston rod of the hydraulic cylinder, the dust and impurities attached to the piston rod are cleaned by the cleaning ring to ensure the smoothness of the piston rod.

[0014] In addition, the piston rod of the hydraulic cylinder is connected to the threaded head by a clamping method, which makes it easier to replace the threaded head. Threaded heads of different lengths can be replaced according to the different distances between the required installation position of the hydraulic cylinder and the required driving components to better meet actual use needs; when the clamping block moves to the innermost end of the connecting groove, the limit sleeve moves under the influence of the spring thrust, so that the insert block is inserted into the connecting groove, which has a limiting effect on the threaded head and ensures the firmness of the connection between the threaded head and the piston rod of the hydraulic cylinder; when the threaded head needs to be replaced, the limit sleeve is moved in the reverse direction, the insert block is separated from the connecting groove, and the threaded head can be rotated in the reverse direction to separate the piston rod of the hydraulic cylinder from the threaded head, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0016] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0017] In the attached picture:

[0018] Figure 1 The overall axial side structure schematic diagram of the present application is shown;

[0019] Figure 2 A schematic diagram of the split structure of the hydraulic cylinder and the stroke sensor of the present application is shown;

[0020] Figure 3 A schematic diagram showing the split structure of the piston rod and the threaded head of the hydraulic cylinder of the present application is shown;

[0021] Figure 4 A schematic diagram of the connection structure between the support frame and the cleaning ring of the present application is shown.

[0022] Reference numerals list

[0023] 1. Hydraulic cylinder; 101. Connecting hole; 102. Guide block; 103. Clamp block; 2. Connecting frame; 3. Travel sensor; 4. Connecting rod; 5. Nut; 6. Support frame; 7. Cleaning ring; 8. Limit sleeve; 801. Live hole; 802. Insert block; 9. Threaded head; 901. Slot; 9011. Connecting groove; 10. Spring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment 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] Example 1: Please refer to Figures 1 to 4 :

[0026] The utility model proposes a hydraulic cylinder with a stroke detection function, comprising: a hydraulic cylinder 1; two connecting frames 2 are fixedly installed on the outside of the hydraulic cylinder 1, and a stroke sensor 3 is installed inside the connecting frame 2, and the model of the stroke sensor 3 is LVTD; a connecting rod 4 is installed inside the piston rod of the hydraulic cylinder 1, and nuts 5 are connected at both ends of the connecting rod 4, one of the nuts 5 is in contact with the piston rod of the hydraulic cylinder 1, and the other nut 5 is in contact with the stroke sensor 3; a cleaning ring 7 is installed on the outside of the hydraulic cylinder 1; a threaded head 9 is connected to the outer end of the piston rod of the hydraulic cylinder 1, and a limiting sleeve 8 is sleeved on the outside of the piston rod of the hydraulic cylinder 1 , the limit sleeve 8 is in contact with the threaded head 9; the stroke sensor 3 is fixedly connected to the cylinder body of the hydraulic cylinder 1 through the connecting frame 2, a connecting hole 101 is provided in the piston rod of the hydraulic cylinder 1, one end of the connecting rod 4 is connected to the connecting hole 101, and the other end of the connecting rod 4 is connected to the end of the movable rod of the stroke sensor 3. When the piston rod of the hydraulic cylinder 1 moves, the piston rod drives the movable rod of the stroke sensor 3 to move through the connecting rod 4, and the travel stroke of the piston rod of the hydraulic cylinder 1 is detected through the stroke sensor 3. The stroke sensor 3 can be used as analog output, switch output or IO-Link process data, which is easy to use.

[0027] In the disclosed embodiment, the support frame 6 is fixedly connected to the cylinder body of the hydraulic cylinder 1, and a cleaning ring 7 is installed on the inner side of the support frame 6. The inner diameter of the cleaning ring 7 is equal to the outer diameter of the piston rod of the hydraulic cylinder 1, and the piston rod of the hydraulic cylinder 1 passes through the cleaning ring 7. By adopting the above technical scheme, during the movement of the piston rod of the hydraulic cylinder 1, the cleaning ring 7 is used to clean the dust and impurities attached to the piston rod, thereby ensuring the smoothness of the piston rod.

[0028] In the disclosed embodiment, a slot 901 is provided at one end of the threaded head 9, and the end of the piston rod of the hydraulic cylinder 1 is inserted into the slot 901. A clamping block 103 is provided at the end of the piston rod of the hydraulic cylinder 1, and a connecting groove 9011 is provided outside the slot 901. The connecting groove 9011 is L-shaped, and the clamping block 103 is connected to the connecting groove 9011; by adopting the above technical scheme, the piston rod of the hydraulic cylinder 1 is connected to the threaded head 9 by clamping, so that the threaded head 9 is easier to replace, and the threaded heads 9 of different lengths can be replaced according to the different spacing distances between the required installation position of the hydraulic cylinder 1 and the required driving components, so as to better meet the actual use requirements.

[0029] Embodiment 2, on the basis of embodiment 1, the limiting sleeve 8 is slidably connected to the outside of the piston rod of the hydraulic cylinder 1, a guide block 102 is provided on the outside of the piston rod of the hydraulic cylinder 1, a movable hole 801 is provided in the limiting sleeve 8, the guide block 102 is slidably connected in the movable hole 801, an insert block 802 is provided on the outside of the limiting sleeve 8, the insert block 802 is inserted in the connecting groove 9011, a spring 10 is sleeved on the outside of the piston rod of the hydraulic cylinder 1, one end of the spring 10 is in contact with the limiting sleeve 8, and the other end of the spring 10 is in contact with the piston rod of the hydraulic cylinder 1;

[0030] By adopting the above technical solution, when the blocking block 103 moves to the innermost end of the connecting groove 9011, the limiting sleeve 8 is moved by the thrust of the spring 10, so that the insert block 802 is inserted into the connecting groove 9011, which has a limiting effect on the threaded head 9 and ensures the firmness of the connection between the threaded head 9 and the piston rod of the hydraulic cylinder 1. When the threaded head 9 needs to be replaced, the limiting sleeve 8 is moved in the reverse direction, and the insert block 802 is separated from the connecting groove 9011, and the threaded head 9 can be rotated in the reverse direction to separate the piston rod of the hydraulic cylinder 1 from the threaded head 9, which is convenient for operation.

[0031] The working principle of this embodiment is as follows: when the piston rod of the hydraulic cylinder 1 moves, the piston rod drives the movable rod of the stroke sensor 3 to move through the connecting rod 4, and the stroke sensor 3 detects the movement stroke of the piston rod of the hydraulic cylinder 1. The stroke sensor 3 can be used as analog output, switch output or IO-Link process data; during the movement of the piston rod of the hydraulic cylinder 1, the dust and impurities attached to the piston rod are cleaned by the cleaning ring 7; according to the different distances between the required installation position of the hydraulic cylinder 1 and the required driving components, a thread head 9 of suitable length is selected, and the piston rod of the hydraulic cylinder 1 is connected to the thread head 9 by clamping; when the clamping block 103 moves to the innermost end of the connecting groove 9011, the limiting sleeve 8 is moved by the thrust of the spring 10, so that the insert block 802 is inserted into the connecting groove 9011, which has a limiting effect on the thread head 9 and ensures the firmness of the connection between the thread head 9 and the piston rod of the hydraulic cylinder 1.

[0032] In this article, there are a few points to note:

[0033] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0034] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0035] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A hydraulic cylinder with a stroke detection function, characterized in that: include: A hydraulic cylinder (1) and a support frame (6); two connecting frames (2) are fixedly mounted on the outside of the hydraulic cylinder (1), and a stroke sensor (3) is mounted inside the connecting frame (2); a connecting rod (4) is mounted inside the piston rod of the hydraulic cylinder (1), and nuts (5) are connected at both ends of the connecting rod (4), one of the nuts (5) is in contact with the piston rod of the hydraulic cylinder (1), and the other nut (5) is in contact with the stroke sensor (3); a cleaning ring (7) is mounted on the outside of the hydraulic cylinder (1); a threaded head (9) is connected to the outer end of the piston rod of the hydraulic cylinder (1), and a limiting sleeve (8) is sleeved on the outside of the piston rod of the hydraulic cylinder (1), and the limiting sleeve (8) is in contact with the threaded head (9).

2. A hydraulic cylinder with stroke detection function according to claim 1, characterized in that: The stroke sensor (3) is fixedly connected to the cylinder body of the hydraulic cylinder (1) via a connecting frame (2); a connecting hole (101) is provided in the piston rod of the hydraulic cylinder (1); one end of the connecting rod (4) is connected to the connecting hole (101); and the other end of the connecting rod (4) is connected to the end of the movable rod of the stroke sensor (3).

3. The hydraulic cylinder with stroke detection function according to claim 1, characterized in that: The support frame (6) is fixedly connected to the cylinder body of the hydraulic cylinder (1); a cleaning ring (7) is installed inside the support frame (6); the inner diameter of the cleaning ring (7) is equal to the outer diameter of the piston rod of the hydraulic cylinder (1); and the piston rod of the hydraulic cylinder (1) passes through the cleaning ring (7).

4. The hydraulic cylinder with stroke detection function according to claim 1, characterized in that: A slot (901) is provided at one end of the threaded head (9), and the end of the piston rod of the hydraulic cylinder (1) is inserted into the slot (901). A clamping block (103) is provided at the end of the piston rod of the hydraulic cylinder (1). A connecting groove (9011) is provided outside the slot (901), and the connecting groove (9011) is L-shaped. The clamping block (103) is connected to the connecting groove (9011).

5. The hydraulic cylinder with stroke detection function according to claim 1, characterized in that: The limiting sleeve (8) is slidably connected to the outside of the piston rod of the hydraulic cylinder (1); a guide block (102) is provided on the outside of the piston rod of the hydraulic cylinder (1); a movable hole (801) is provided in the limiting sleeve (8); and the guide block (102) is slidably connected to the movable hole (801).

6. The hydraulic cylinder with stroke detection function according to claim 4, characterized in that: An insert block (802) is provided outside the limiting sleeve (8), and the insert block (802) is inserted into the connecting groove (9011).

7. The hydraulic cylinder with stroke detection function according to claim 1, characterized in that: A spring (10) is sleeved on the outside of the piston rod of the hydraulic cylinder (1); one end of the spring (10) is in contact with the limiting sleeve (8), and the other end of the spring (10) is in contact with the piston rod of the hydraulic cylinder (1).

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