Sealed electric cylinder
By using sealing protective components in electric cylinders, the problem of insufficient sealing in complex environments of traditional electric cylinders is solved, and higher sealing and adaptability are achieved, which extends service life and is suitable for water vapor or water droplet environments.
Patent Information
- Application Number
- CN202420889662.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-26
AI Technical Summary
Traditional electric cylinders are prone to failure of seal oxidation failure and invasion of external substances in complex environments, and are not suitable for water vapor or water droplet environments, resulting in corrosion and wear of transmission components.
Seal protection components are adopted, including telescopic protective joints, protective jacket shells, return springs, sealing sleeves, thread reinforcement rings and built-in rubber rings to ensure the seal between the reciprocating telescopic rod and the cylinder block and prevent moisture and debris from entering. , and quickly install and disassemble with bolts.
It effectively avoids the invasion of water vapor and debris, extends the service life, maintains the sealed state of the electric cylinder, is suitable for a wider range of environmental conditions, and simplifies the assembly installation and disassembly process.
Smart Images
Figure CN222192045U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric cylinders, in particular to a sealed electric cylinder. Background Art
[0002] The electric cylinder is a linear motion device that integrates the motor and the lead screw. It has the advantages of high transmission accuracy, quick response, low noise, strong anti-pollution ability, and is easier to achieve high-precision motion control when connected to the control circuit. Due to the many advantages of the electric cylinder, its application fields are becoming more and more extensive, such as industrial processing, aerospace, robotics, simulation equipment, medical machinery and other fields. At the same time, the complexity of the working conditions of the electric cylinder is also increasing. In some fields, the electric cylinder has non-steady linear motion during operation, and the telescopic rod of the electric cylinder is subjected to impact force, etc. For example, in the aircraft landing gear, the electric cylinder used in the aircraft landing gear is subjected to impact loads during the landing of the aircraft.
[0003] The traditional electric cylinder is basically lubricated with grease or lubricating oil. The structure of the widely used electric cylinder is that the fixed sleeve and the movable sleeve are sealed by a packing seal. The material of this seal is rubber, which is easy to oxidize and fail over time. And due to the inevitable dynamic friction between the seal and the electric cylinder shaft, there is a certain gap between the seal, the electric cylinder fixed sleeve and the electric cylinder movable sleeve, which will cause the lubricant in the electric cylinder to leak out. The lubricant is exposed to the oxygen environment for a long time, which is easy to be oxidized and easily fail, which is not conducive to the transmission of the electric cylinder; and dust and small solid particles in the air enter the electric cylinder, which accelerates the wear of the parts in the electric cylinder and accelerates the failure of the electric cylinder.
[0004] In the technology of electric cylinders, current electric cylinders can only be used in clean environments with relatively high environmental requirements. They are not suitable for environments with water vapor or water droplets. It is very easy for water to enter the interior of the electric cylinder and corrode the internal transmission components of the electric cylinder. Utility Model Content
[0005] The purpose of the utility model is to provide a sealed electric cylinder to solve the problems raised in the above background technology.
[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0007] A sealed electric cylinder comprises a driving motor, a cylinder body, a reciprocating telescopic rod and a transmission base, wherein the outer wall of the cylinder body is sleeved with a sealing protection component;
[0008] The sealing protection assembly comprises a telescopic protection joint bellows sleeved on the outer wall of the cylinder body, a protective outer sleeve sleeved on the outer wall of the telescopic protection joint bellows, and a return spring surrounding the telescopic protection joint bellows and the cylinder body;
[0009] The top of the telescopic protective joint tube is fixedly connected with an auxiliary assembly ring, the top of the reset spring is fixedly connected to the bottom surface of the auxiliary assembly ring, the upper surface of the auxiliary assembly ring is fixedly connected with a sealing ring, and the outer wall of the sealing ring is threadedly connected with a threaded reinforcement ring for tightening it.
[0010] A further improvement of the technical solution of the utility model is that: the bottom end of the telescopic protective joint tube is fixedly connected with a fixed bottom ring, the outer wall of the fixed bottom ring is fixedly connected to the inner wall of the protective outer shell, and the inner wall of the reset spring is movably connected to the outer wall of the cylinder body.
[0011] A further improvement of the technical solution of the utility model is that: the inner wall of the sealing ring is fixedly connected with a built-in rubber ring, the sealing ring is composed of symmetrically distributed arc rings, and the inner wall of the built-in rubber ring is movably connected to the outer wall of the reciprocating telescopic rod.
[0012] A further improvement of the technical solution of the utility model is that: a fitting sealing ring is fixedly connected to the upper surface of the threaded reinforcement ring, and the inner wall of the fitting sealing ring is sleeved with the outer wall of the reciprocating telescopic rod.
[0013] A further improvement of the technical solution of the utility model is that a telescopic hole for the telescopic protective joint tube to telescope up and down is opened on the upper surface of the protective outer shell, and the outer wall of the telescopic protective joint tube is movably connected to the inner wall of the telescopic hole.
[0014] A further improvement of the technical solution of the utility model is that the bottom end of the protective outer shell is fixedly connected to the upper surface of the transmission base by bolts.
[0015] A further improvement of the technical solution of the utility model is that the upper surface of the transmission base is fixedly connected to the bottom end of the driving motor.
[0016] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:
[0017] The utility model provides a sealed electric cylinder, which utilizes the coordinated use of a telescopic protective joint tube, a sealing collar, a threaded reinforcement ring, a built-in rubber ring and a fitting sealing ring, so that during the operation of the reciprocating telescopic rod, the connecting gap between the reciprocating telescopic rod and the cylinder body can still be kept sealed, thereby preventing water vapor or debris from invading the interior of the device and affecting the service life of the electric cylinder, and at the same time will not cause adverse effects on the operating state of the reciprocating telescopic rod.
[0018] The utility model provides a sealed electric cylinder, which utilizes the protective outer shell to protect the telescopic protective joint corrugated tube, so that the telescopic protective joint corrugated tube can avoid direct impact of external objects, thereby extending the service life of the telescopic protective joint corrugated tube.
[0019] The utility model provides a sealed electric cylinder, which can quickly install and disassemble a sealing protection component by utilizing a threaded reinforcement ring, a sealing collar and bolts at the bottom of a protective outer casing, and has a simple structure and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the structure of the utility model;
[0021] Figure 2 This is a schematic diagram of the disassembled structure of the protective outer shell of the utility model;
[0022] Figure 3 It is a schematic diagram of the cylinder structure details of the utility model;
[0023] Figure 4 It is a schematic diagram of the top view of the telescopic protective joint tube of the utility model.
[0024] In the figure: 1. driving motor; 2. cylinder body; 3. transmission base; 4. protective outer casing; 5. telescopic protective joint tube; 6. sealing ring; 7. threaded reinforcement ring; 8. reciprocating telescopic rod; 9. reset spring; 10. fitting sealing ring; 11. built-in rubber ring; 12. fixed bottom ring; 13. auxiliary assembly ring. DETAILED DESCRIPTION
[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0026] The present invention is further described in detail below in conjunction with the embodiments:
[0027] like Figure 1-4 As shown, the utility model provides a sealed electric cylinder, comprising a driving motor 1, a cylinder body 2, a reciprocating telescopic rod 8 and a transmission base 3, wherein the outer wall of the cylinder body 2 is sleeved with a sealing protection component;
[0028] The sealing protection assembly includes a telescopic protection joint bellows 5 sleeved on the outer wall of the cylinder body 2, a protective outer shell 4 sleeved on the outer wall of the telescopic protection joint bellows 5, and a return spring 9 surrounding the telescopic protection joint bellows 5 and the cylinder body 2;
[0029] The top of the telescopic protective joint bellows 5 is fixedly connected with an auxiliary assembly ring 13, the top of the reset spring 9 is fixedly connected to the bottom surface of the auxiliary assembly ring 13, and the upper surface of the auxiliary assembly ring 13 is fixedly connected with a sealing ring 6. When the telescopic protective joint bellows 5 is retracted and reset, the reset spring 9 is also reset synchronously, so that the reset spring 9 can always support the inner wall of the telescopic protective joint bellows 5, so that the extension and contraction of the telescopic protective joint bellows 5 are more stable. The inner diameter of the reset spring 9 is larger than the maximum flat cutting diameter of the cylinder body 2, and the outer wall of the sealing ring 6 is threadedly connected with a threaded reinforcement ring 7 for tightening it.
[0030] The bottom end of the telescopic protection joint corrugated tube 5 is fixedly connected with a fixed bottom ring 12, the outer wall of the fixed bottom ring 12 is fixedly connected to the inner wall of the protective outer shell 4, and the inner wall of the reset spring 9 is movably connected to the outer wall of the cylinder 2. When the reciprocating telescopic rod 8 is pushed and moved outward, the top outer wall of the reciprocating telescopic rod 8 will drive the sealing ring 6 to move upward, and the sealing ring 6 drives the auxiliary assembly ring 13 to move upward, and the auxiliary assembly ring 13 drives the telescopic protection joint corrugated tube 5 to start to expand, and at the same time drives the reset spring 9 to start to stretch. At this time, the connection gap between the reciprocating telescopic rod 8 and the cylinder 2 is always within the coverage of the telescopic protection joint corrugated tube 5, and will not contact the outside world, thereby preventing dust or water vapor from the outside from invading the inside of the device.
[0031] The inner wall of the sealing ring 6 is fixedly connected with a built-in rubber ring 11. The sealing ring 6 is composed of symmetrically distributed arc rings, so it can make the reciprocating telescopic rod 8 more tightly sealed. The inner wall of the built-in rubber ring 11 is movably connected to the outer wall of the reciprocating telescopic rod 8.
[0032] like Figure 1-4 As shown, based on Example 1, the utility model provides a technical solution: preferably, a fitting sealing ring 10 is fixedly connected to the upper surface of the threaded reinforcement ring 7, and the inner wall of the fitting sealing ring 10 is sleeved with the outer wall of the reciprocating telescopic rod 8.
[0033] The upper surface of the protective outer shell 4 is provided with a telescopic hole for the telescopic protective joint bellows 5 to telescopically move up and down, and the outer wall of the telescopic protective joint bellows 5 is movably connected to the inner wall of the telescopic hole. The bottom end of the protective outer shell 4 is fixedly connected to the upper surface of the transmission base 3 by bolts. The upper surface of the transmission base 3 is fixedly connected to the bottom end of the drive motor 1.
[0034] The following is a detailed description of the working principle of the sealed electric cylinder.
[0035] like Figure 1-4As shown, when in use, the protective outer shell 4 together with the telescopic protective joint tube 5 inside it is sleeved on the outer wall of the cylinder body 2 until the bottom surface of the protective outer shell 4 is fixed to the transmission base 3 by bolts, at this time, the sealing ring 6 will be sleeved on the outer wall of the reciprocating telescopic rod 8, and the bottom surface of the auxiliary assembly ring 13 will overlap with the top of the cylinder body 2, and then the threaded reinforcement ring 7 is sleeved on the reciprocating telescopic rod 8, moved down, and contacted with the sealing ring 6, and then rotated to tighten the sealing ring 6, so that the sealing ring 6 squeezes the built-in rubber ring 11, so that the built-in rubber ring 11 is completely attached to the reciprocating telescopic rod 8, completing the sealing of the gap between the reciprocating telescopic rod 8 and the cylinder body 2, and the protective outer shell 4 can be removed by the reverse operation.
[0036] When the reciprocating telescopic rod 8 is pushed and moved outward, the top outer wall of the reciprocating telescopic rod 8 will drive the sealing ring 6 to move upward, the sealing ring 6 will drive the auxiliary assembly ring 13 to move upward, the auxiliary assembly ring 13 will drive the telescopic protection joint tube 5 to start to expand, and at the same time drive the reset spring 9 to start to stretch. At this time, the connecting gap between the reciprocating telescopic rod 8 and the cylinder body 2 is always within the coverage of the telescopic protection joint tube 5 and will not contact the outside world, thereby preventing external dust or water vapor from invading the inside of the device.
[0037] When the telescopic protective joint bellows 5 contracts and resets, the reset spring 9 also resets synchronously, so that the reset spring 9 can always support the inner wall of the telescopic protective joint bellows 5, making the extension and contraction of the telescopic protective joint bellows 5 more stable. The inner diameter of the reset spring 9 is larger than the maximum flat cutting diameter of the cylinder body 2.
[0038] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.
Claims
1. A sealed electric cylinder, comprising a drive motor (1), a cylinder body (2), a reciprocating telescopic rod (8) and a transmission base (3), characterized in that: The outer wall of the cylinder body (2) is sleeved with a sealing protection component; The sealing protection assembly comprises a telescopic protection joint bellows (5) sleeved on the outer wall of the cylinder body (2), a protective outer shell (4) sleeved on the outer wall of the telescopic protection joint bellows (5), and a return spring (9) surrounding the telescopic protection joint bellows (5) and the cylinder body (2); The top end of the telescopic protective joint tube (5) is fixedly connected to an auxiliary assembly ring (13), the top end of the return spring (9) is fixedly connected to the bottom surface of the auxiliary assembly ring (13), the upper surface of the auxiliary assembly ring (13) is fixedly connected to a sealing collar (6), and the outer wall of the sealing collar (6) is threadedly connected to a threaded reinforcement ring (7) for tightening the sealing collar (6).
2. A sealed electric cylinder according to claim 1, characterized in that: The bottom end of the telescopic protective joint tube (5) is fixedly connected to a fixed bottom ring (12), the outer wall of the fixed bottom ring (12) is fixedly connected to the inner wall of the protective outer shell (4), and the inner wall of the return spring (9) is movably connected to the outer wall of the cylinder body (2).
3. The sealed electric cylinder according to claim 1, characterized in that: The inner wall of the sealing ring (6) is fixedly connected to a built-in rubber ring (11); the sealing ring (6) is composed of symmetrically distributed arc rings; the inner wall of the built-in rubber ring (11) is movably connected to the outer wall of the reciprocating telescopic rod (8).
4. The sealed electric cylinder according to claim 1, characterized in that: A fitting sealing ring (10) is fixedly connected to the upper surface of the threaded reinforcement ring (7), and the inner wall of the fitting sealing ring (10) is sleeved with the outer wall of the reciprocating telescopic rod (8).
5. The sealed electric cylinder according to claim 1, characterized in that: The upper surface of the protective outer shell (4) is provided with a telescopic hole for the telescopic protective joint tube (5) to telescope up and down, and the outer wall of the telescopic protective joint tube (5) is movably connected to the inner wall of the telescopic hole.
6. The sealed electric cylinder according to claim 1, characterized in that: The bottom end of the protective outer shell (4) is fixedly connected to the upper surface of the transmission base (3) via bolts.
7. The sealed electric cylinder according to claim 1, characterized in that: The upper surface of the transmission base (3) is fixedly connected to the bottom end of the drive motor (1).