Heavy-load hydraulic cylinder

Abstract

The utility model discloses a heavy load type hydraulic cylinder in the technical field of hydraulic cylinders, which comprises a cylinder body and a hydraulic rod, the hydraulic rod is slidably connected in the middle of the cylinder body, a piston is arranged at the tail of the hydraulic rod, a magnet is arranged at the position of the hydraulic rod close to the piston, and the magnet reciprocates at two ends of the cylinder body along with the hydraulic rod. Magnetic induction sensors are arranged on the outer walls of the two ends of the cylinder body, the magnetic induction sensors are connected with a control mechanism, the magnetic induction sensors are used for sensing the positions of the magnets and transmitting signals to the control mechanism, and after the control mechanism receives the signals, the position where the piston is located is judged. When the hydraulic rod and the piston move to the two ends of the cylinder body, the pressure is controlled, and the cylinder body is prevented from being damaged; and a fixing mechanism for fixing the magnetic induction sensor is arranged on the outer wall of the cylinder body so as to prevent the magnetic induction sensor from being separated from the outer wall of the cylinder body due to impact force.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a heavy-load hydraulic cylinder. Background Art

[0002] With the continuous development of society and the continuous progress of industry, the hydraulic cylinder is one of the hydraulic components that converts hydraulic energy into mechanical energy and performs reciprocating motion. It has a wide range of uses in industry. The heavy-duty hydraulic cylinder among hydraulic cylinders has a stronger working force and has excellent performance in some heavy industries.

[0003] The heavy-duty hydraulic cylinder in the prior art will generate huge impact force during operation. In order to reduce the impact force, in addition to a buffer mechanism installed inside to resist the impact force, a magnet that moves back and forth with the hydraulic rod will also be installed inside. A magnetic induction sensor that senses the position of the magnet is provided on the outer wall. After the magnetic induction sensor senses the position of the magnet, it transmits it to the control system. When the magnet moves near the two ends of the hydraulic cylinder, the control system will reduce the pressure of the hydraulic rod and the piston, thereby reducing the impact force on the hydraulic cylinder and extending the service life of the heavy-duty hydraulic cylinder.

[0004] However, magnetic induction sensors are usually attached to the outer wall of the hydraulic cylinder and can easily fall off due to the impact force on the hydraulic cylinder, affecting the work of sensing the position of the magnet, thereby affecting the control system's control of the hydraulic rod and piston, and reducing the service life of the heavy-duty hydraulic cylinder. Utility Model Content

[0005] The purpose of the utility model is to provide a heavy-duty hydraulic cylinder to solve the problem that the existing magnetic induction sensors mentioned above are all clamped on the outer wall of the hydraulic cylinder, which is very easy to fall off due to the impact force applied to the hydraulic cylinder, affecting the work of sensing the position of the magnet, thereby affecting the control system's control of the hydraulic rod and the piston, and reducing the service life of the heavy-duty hydraulic cylinder.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A heavy-duty hydraulic cylinder comprises a cylinder body and a hydraulic rod, wherein the hydraulic rod is slidably connected to the middle of the cylinder body, a piston is arranged at the tail of the hydraulic rod, a magnet is arranged near the piston at the position of the hydraulic rod, the magnet moves back and forth at the two ends of the cylinder body along with the hydraulic rod, a magnetic induction sensor is arranged on the outer wall at the two ends of the cylinder body, the magnetic induction sensor is connected to a control mechanism, the magnetic induction sensor is used to sense the position of the magnet and transmit a signal to the control mechanism, after receiving the signal, the control mechanism determines the position of the piston, and controls the pressure when the hydraulic rod and the piston move to the two ends of the cylinder body to prevent damage to the cylinder body;

[0008] The outer wall of the cylinder body is provided with a fixing mechanism for fixing the magnetic induction sensor to prevent the magnetic induction sensor from being separated from the outer wall of the cylinder body due to impact force.

[0009] As a further solution of the utility model: blocking cavities are respectively opened on the outer walls at both ends of the cylinder body, and installation cavities are respectively opened in the two blocking cavities, the two installation cavities match the magnetic induction sensors, the magnetic induction sensors are slidably inserted in the installation cavities, and the fixing mechanism is installed in the blocking cavity to fix the magnetic induction sensors inserted in the installation cavities.

[0010] As a further solution of the utility model: the fixing mechanism includes a sealing rubber sleeve and a sealing block, the sealing rubber sleeve is installed on the inner wall of the sealing cavity and has an interference fit with the inner wall of the sealing cavity, a hole is opened in the sealing rubber sleeve, the sealing block is passed through the sealing rubber sleeve to fix the sealing rubber sleeve in the sealing cavity, the sealing rubber sleeve and the sealing block work together to fix the magnetic induction sensor in the installation cavity.

[0011] As a further solution of the utility model: a first slope and a second slope are respectively provided on opposite sides of the inner wall of the sealing rubber sleeve, and a third slope and a fourth slope are respectively provided on opposite sides of the outer wall of the sealing block, and the first slope and the second slope have the same inclination angle as the third slope or the fourth slope.

[0012] As a further solution of the utility model: a friction bulge is provided on the inner wall of the blocking cavity, and the friction bulge is used to increase the friction between the blocking rubber sleeve and the blocking cavity.

[0013] As a further solution of the utility model: a through hole is opened on the cylinder body and communicates with the two blocking chambers and the installation chamber, and the width of the through hole is smaller than the blocking chamber and the installation chamber. The through hole facilitates the electrical connection of the magnetic induction sensor with the control mechanism through a connecting wire.

[0014] As a further solution of the utility model: a top block is provided at the end of the hydraulic rod away from the piston, and an anti-impact component is also provided on the cylinder body, and the anti-impact component is used to prevent the piston from colliding with the inner wall of the cylinder body.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides an anti-impact component to prevent the hydraulic rod from hitting the hydraulic cylinder at both ends of the stroke, thereby increasing the service life of the cylinder body; when a top block at one end of the hydraulic rod is impacted, the top block presses the anti-impact component to prevent the top block from directly hitting the cylinder body and causing damage.

[0017] The magnetic induction sensor in the utility model can sense the position of the magnet through the outer wall of the cylinder body. When the magnet moves to any end of the cylinder body with the hydraulic rod, it can be sensed by the magnetic induction sensor on the outer wall of the cylinder body, and then the signal is transmitted to the control mechanism. After receiving the signal, the control mechanism can quickly determine the position of the piston, and then control the pressure of the hydraulic rod and the piston by controlling the hydraulic oil to prevent damage to the cylinder body.

[0018] The fixing mechanism in the utility model can firmly fix the two magnetic induction sensors on the outer wall of the cylinder body, and the two magnetic induction sensors will not fall off due to the vibration of the cylinder body, thereby avoiding affecting the perception of the magnetic induction sensors on the position of the magnet.

[0019] In the utility model, the blocking block will squeeze the blocking rubber sleeve and firmly press the blocking rubber sleeve against the inner wall of the blocking cavity to prevent the blocking rubber sleeve from separating from the inner wall of the blocking cavity. After the blocking block and the blocking rubber sleeve are fixed in the blocking cavity, the blocking rubber sleeve and the blocking block can work together to press against the side wall of the magnetic induction sensor and firmly fix the magnetic induction sensor in the installation cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the working state of the utility model;

[0021] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model in a non-working state;

[0023] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0024] Figure 5 It is a schematic diagram of the structure of the utility model;

[0025] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0026] Figure 7 It is a three-dimensional structural schematic diagram of the sealing rubber sleeve in the utility model;

[0027] Figure 8 It is a three-dimensional structural schematic diagram of the blocking block in the utility model.

[0028] In the figure: 1. cylinder body; 11. sealing cavity; 12. friction protrusion; 13. mounting cavity; 14. through hole; 2. hydraulic rod; 3. top block; 4. anti-impact component; 5. magnetic induction sensor; 6. sealing rubber sleeve; 61. first inclined plane; 62. second inclined plane; 7. sealing block; 71. third inclined plane; 72. fourth inclined plane. DETAILED DESCRIPTION

[0029] 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 in 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.

[0030] This embodiment;

[0031] A heavy-duty hydraulic cylinder, such as Figure 1-Figure 8 As shown, it includes a cylinder body 1 and a hydraulic rod 2, the hydraulic rod 2 is slidably connected to the middle part of the cylinder body 1, a piston is provided at the tail of the hydraulic rod 2, and a top block 3 is provided at the end of the hydraulic rod 2 away from the piston. An anti-impact component 4 is also provided on the cylinder body 1, and the anti-impact component 4 is used to prevent the piston from colliding with the inner wall of the cylinder body 1. By setting the anti-impact component 4, the hydraulic rod 2 is prevented from colliding with the cylinder body 1 at both ends of the stroke, thereby improving the service life of the cylinder body 1; when the top block 3 at one end of the hydraulic rod 2 is impacted, the top block 3 presses the anti-impact component 4 to prevent the top block 3 from directly colliding with the cylinder body 1 and causing damage.

[0032] like Figure 1-Figure 8 As shown, in this embodiment: a magnet is provided at the position of the hydraulic rod 2 near the piston, and the magnet moves back and forth at both ends of the cylinder body 1 with the hydraulic rod 2. Magnetic induction sensors 5 are provided on the outer walls at both ends of the cylinder body 1, and the magnetic induction sensors 5 are connected to the control mechanism. The magnetic induction sensor 5 can sense the position of the magnet through the outer wall of the cylinder body 1. When the magnet moves to either end of the cylinder body 1 with the hydraulic rod 2, it can be sensed by the magnetic induction sensor 5 on the outer wall of the cylinder body 1, and then the signal is transmitted to the control mechanism. After receiving the signal, the control mechanism can quickly determine the position of the piston, and then control the pressure of the hydraulic rod 2 and the piston by controlling the hydraulic oil to prevent damage to the cylinder body 1.

[0033] like Figure 1-Figure 8 As shown, in this embodiment: the outer wall of the cylinder body 1 is provided with a fixing mechanism for fixing the magnetic induction sensor 5 to prevent the magnetic induction sensor 5 from being separated from the outer wall of the cylinder body 1 due to impact force. The fixing mechanism can firmly fix the two magnetic induction sensors 5 on the outer wall of the cylinder body 1, and they will not fall off due to the vibration of the cylinder body 1, thereby avoiding affecting the magnetic induction sensor 5's perception of the magnet position.

[0034] like Figure 1-Figure 8As shown, in the present embodiment: blocking cavities 11 are respectively opened on the outer walls at both ends of the cylinder body 1, and installation cavities 13 are respectively opened in the two blocking cavities 11, the width of the installation cavity 13 is smaller than the blocking cavity 11, and the two installation cavities 13 perfectly match the shape of the outer shell of the magnetic induction sensor 5, and the magnetic induction sensor 5 is slidably inserted in the installation cavity 13, and the installation cavity 13 can be used to accommodate the magnetic induction sensor 5 without shaking; the fixing mechanism is installed in the blocking cavity 11, and the fixing mechanism can push against the side wall of the magnetic induction sensor 5 to firmly fix the magnetic induction sensor 5 on the outer wall of the cylinder body 1.

[0035] like Figure 1-Figure 8 As shown, in the present embodiment: a through hole 14 penetrating the two blocking chambers 11 and the mounting chamber 13 is provided on the cylinder body 1, and the width of the through hole 14 is smaller than that of the blocking chamber 11 and the mounting chamber 13. Since the magnetic induction sensor 5 and the fixing mechanism are respectively mounted in the mounting chamber 13 and the blocking chamber 11, the width of the through hole 14 is smaller than that of the blocking chamber 11 and the mounting chamber 13, which can prevent the magnetic induction sensor 5 and the fixing mechanism from being separated from the mounting chamber 13 and the blocking chamber 11 through the through hole 14; moreover, the through hole 14 can also facilitate the electrical connection of the magnetic induction sensor 5 with the control mechanism through the connecting wire, and the width of the through hole 14 can be set narrower as long as the connecting wire can slide.

[0036] like Figure 1-Figure 8 As shown, in this embodiment: the fixing mechanism includes a sealing rubber sleeve 6 and a sealing block 7. The sealing rubber sleeve 6 is installed on the inner wall of the sealing cavity 11 and has an interference fit with the inner wall of the sealing cavity 11. Therefore, the sealing rubber sleeve 6 can be firmly distributed on the inner wall of the sealing cavity 11 and is not easy to fall off.

[0037] like Figure 1-Figure 8 As shown, in this embodiment: a friction protrusion 12 is provided on the inner wall of the blocking cavity 11 , and the friction protrusion 12 is used to increase the friction between the blocking rubber sleeve 6 and the blocking cavity 11 to prevent the blocking rubber sleeve 6 from separating from the inner wall of the blocking cavity 11 .

[0038] like Figure 1-Figure 8 As shown, in this embodiment: a hole is opened in the sealing rubber sleeve 6, and the sealing block 7 can be inserted into the hole and passed through the sealing rubber sleeve 6. The sealing block 7 will squeeze the sealing rubber sleeve 6, and press the sealing rubber sleeve 6 firmly against the inner wall of the sealing cavity 11 to prevent the sealing rubber sleeve 6 from detaching from the inner wall of the sealing cavity 11; after the sealing block 7 and the sealing rubber sleeve 6 are fixed in the sealing cavity 11, the sealing rubber sleeve 6 and the sealing block 7 can work together to press against the side wall of the magnetic induction sensor 5, and firmly fix the magnetic induction sensor 5 in the installation cavity 13.

[0039] like Figure 1-Figure 8As shown, in this embodiment: the first bevel 61 and the second bevel 62 are respectively provided on the opposite sides of the inner wall of the sealing rubber sleeve 6, and the third bevel 71 and the fourth bevel 72 are respectively provided on the opposite sides of the outer wall of the sealing block 7, and the first bevel 61 and the second bevel 62 are respectively inclined at the same angle as the third bevel 71 or the fourth bevel 72; in this way, during the insertion process of the sealing block 7, the third bevel 71 and the fourth bevel 72 can slide along the first bevel 61 or the second bevel 62 respectively, and the sealing block 7 squeezes the sealing rubber sleeve 6 to firmly press the sealing rubber sleeve 6 against the inner wall of the sealing cavity 11, thereby preventing the sealing rubber sleeve 6 from detaching from the inner wall of the sealing cavity 11.

[0040] The working principle of the utility model is as follows: first, the magnetic induction sensor 5 is slidably inserted into the installation cavity 13. During the insertion process, ensure that the connecting wire on the magnetic induction sensor 5 passes through the through hole 14. Then, the sealing rubber sleeve 6 is installed on the inner wall of the sealing cavity 11 to ensure that the sealing rubber sleeve 6 is tightly attached to the friction protrusion 12. Next, the sealing block 7 is inserted into the hole in the sealing rubber sleeve 6. During the insertion process, the third inclined surface 71 and the fourth inclined surface 72 slide along the first inclined surface 61 or the second inclined surface 62 respectively. The sealing block 7 squeezes the sealing rubber sleeve 6 to press the sealing rubber sleeve 6 firmly against the inner wall of the sealing cavity 11. Then, the sealing block 7 and the sealing rubber sleeve 6 fixed in the sealing cavity 11 can press against the side of the magnetic induction sensor 5 to firmly fix the magnetic induction sensor 5 in the installation cavity 13.

[0041] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A heavy-duty hydraulic cylinder, comprising a cylinder body (1) and a hydraulic rod (2), characterized in that: The hydraulic rod (2) is slidably connected to the middle of the cylinder body (1); a piston is provided at the tail of the hydraulic rod (2); a magnet is provided near the piston of the hydraulic rod (2); the magnet moves back and forth at the two ends of the cylinder body (1) along with the hydraulic rod (2); magnetic induction sensors (5) are provided on the outer walls of the two ends of the cylinder body (1); the magnetic induction sensors (5) are connected to a control mechanism; the magnetic induction sensors (5) are used to sense the position of the magnet and transmit a signal to the control mechanism; after receiving the signal, the control mechanism determines the position of the piston and controls the pressure when the hydraulic rod (2) and the piston move to the two ends of the cylinder body (1) to prevent damage to the cylinder body (1); The outer wall of the cylinder body (1) is provided with a fixing mechanism for fixing the magnetic induction sensor (5) to prevent the magnetic induction sensor (5) from being separated from the outer wall of the cylinder body (1) due to impact force.

2. A heavy-duty hydraulic cylinder according to claim 1, characterized in that: The outer walls at both ends of the cylinder body (1) are respectively provided with blocking cavities (11), and installation cavities (13) are respectively provided in the two blocking cavities (11). The two installation cavities (13) match the magnetic induction sensors (5), and the magnetic induction sensors (5) are slidably inserted in the installation cavities (13). The fixing mechanism is installed in the blocking cavities (11) to fix the magnetic induction sensors (5) inserted in the installation cavities (13).

3. A heavy-duty hydraulic cylinder according to claim 2, characterized in that: The fixing mechanism comprises a sealing rubber sleeve (6) and a sealing block (7); the sealing rubber sleeve (6) is mounted on the inner wall of the sealing cavity (11) and is interference fit with the inner wall of the sealing cavity (11); a hole is provided in the sealing rubber sleeve (6); the sealing block (7) is inserted into the sealing rubber sleeve (6) to fix the sealing rubber sleeve (6) in the sealing cavity (11); the sealing rubber sleeve (6) and the sealing block (7) work together to fix the magnetic induction sensor (5) in the mounting cavity (13).

4. A heavy-duty hydraulic cylinder according to claim 3, characterized in that: The first inclined surface (61) and the second inclined surface (62) are respectively provided on opposite sides of the inner wall of the sealing rubber sleeve (6), and the third inclined surface (71) and the fourth inclined surface (72) are respectively provided on opposite sides of the outer wall of the sealing block (7), and the first inclined surface (61) and the second inclined surface (62) have the same inclination angle as the third inclined surface (71) or the fourth inclined surface (72).

5. A heavy-duty hydraulic cylinder according to claim 4, characterized in that: The inner wall of the blocking cavity (11) is provided with a friction protrusion (12), and the friction protrusion (12) is used to increase the friction between the blocking rubber sleeve (6) and the blocking cavity (11).

6. A heavy-duty hydraulic cylinder according to claim 2, characterized in that: The cylinder body (1) is provided with a through hole (14) which penetrates the two blocking cavities (11) and the installation cavity (13); the through hole (14) is smaller in width than the blocking cavity (11) and the installation cavity (13); the through hole (14) facilitates the electrical connection of the magnetic induction sensor (5) with the control mechanism via a connecting wire.

7. A heavy-duty hydraulic cylinder according to claim 1, characterized in that: The end of the hydraulic rod (2) away from the piston is provided with a top block (3), and the cylinder body (1) is also provided with an anti-impact component (4), and the anti-impact component (4) is used to prevent the piston from colliding with the inner wall of the cylinder body (1).

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