Linear push rod sealing structure

Abstract

The utility model relates to the technical field of linear push rods, in particular to a linear push rod sealing structure. Comprising a lead screw assembly; the motor assembly is arranged at one end of the lead screw assembly; the front end assembly is arranged outside the lead screw assembly in a sleeving manner; the packaging assembly is arranged outside the front end assembly in a sleeving manner; the outer cylinder is arranged on the periphery of the motor assembly in a sleeving manner; the tail end assembly is arranged at the tail end of the motor assembly; an inner cylinder of the motor assembly and the rear end of the tail end assembly are fixed through a first fastening piece, the first fastening piece and the rear end are sealed through a sealing piece, and a second fastening piece is arranged between a wire harness of the tail end assembly and the rear end. The linear push rod sealing structure has the advantages of being good in sealing effect, high in working efficiency, simple in structure, convenient to disassemble and assemble and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of linear push rods, in particular to a linear push rod sealing structure. Background Art

[0002] An electric linear actuator is an electric drive device that converts the rotational motion of a motor into the linear reciprocating motion of a push rod. It can be used as an executive machine in various simple or complex process flows to achieve remote control, centralized control, or automatic control. It is mostly used as a motion drive unit in industries such as home appliances, kitchenware, medical equipment, and automobiles.

[0003] Chinese patent CN219067997U discloses an AC linear actuator, comprising a screw sleeve with a screw drive rod disposed therein; one end of the screw sleeve connected to a front connector, the other end of the screw sleeve connected to one end of a motor sleeve, the other end of which is sealedly connected to one end of a rear connector; an AC motor disposed within the motor sleeve, the AC motor connected to the screw drive rod via a bearing; and a power cord disposed on the rear connector, one end of which is connected to the AC motor, the other end of which extends beyond the rear connector. This utility model effectively reduces the overall dimensions by housing the AC motor within the motor sleeve, with the motor portion and the screw drive portion being linearly connected. Furthermore, the AC motor portion being housed within the motor sleeve effectively improves waterproof performance, meeting IP67 waterproof and dustproof performance. This utility model can effectively save installation space and improve the waterproof and dustproof performance of the electric actuator through the use of waterproof connectors and sealing rings.

[0004] However, in this technical solution, the motor sleeve and the tail end are sealed by a single sealing ring. The sealing effect of the single sealing ring is poor, which will cause the push rod to work less smoothly and have low working efficiency. In addition, the fixation between the wiring harness and the rear end is unstable and is prone to shaking, which affects the normal use of the push rod. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies of the existing technology and provide a linear push rod sealing structure, in which the motor assembly and the tail end assembly are fixed by fasteners, the seals between the fasteners and the tail end assembly are matched, and the wiring harness and the rear end are also installed with corresponding fasteners. The combination of the two realizes multi-layer and multi-stage sealing and fixation, and the good sealing effect makes the push rod run smoothly, thereby solving the problem that the push rod does not work smoothly due to poor sealing effect.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A linear push rod sealing structure, comprising:

[0008] Screw assembly;

[0009] A motor assembly is arranged at one end of the screw assembly;

[0010] A front end assembly is sleeved on the outside of the screw assembly;

[0011] A packaging component, sleeved on the outside of the front-end component;

[0012] an outer cylinder, sleeved on the outer periphery of the motor assembly; and

[0013] A tail end assembly is provided at the end of the motor assembly;

[0014] The inner cylinder of the motor assembly is fixed to the rear end of the tail end assembly by a first fastener, the first fastener and the rear end are sealed by a seal, and a second fastener is provided between the wiring harness of the tail end assembly and the rear end.

[0015] Preferably, the first fastener includes a plurality of screws, which pass through the inner cylinder and are fixedly connected to the bearing seat of the motor assembly.

[0016] Preferably, the sealing member is correspondingly sleeved on the screw, and the upper surface of the sealing member is arranged close to the head of the screw.

[0017] Preferably, a plurality of stepped holes are correspondingly provided on the rear end, and the stepped holes are sequentially formed with a first step and a second step.

[0018] Preferably, the sealing member is closely arranged on the first step.

[0019] Preferably, an O-ring is provided between the protrusion at the bottom of the sealing member and the second step.

[0020] Preferably, a first groove is provided on the side surface of the sealing member, and a first sealing ring is provided in the first groove.

[0021] Preferably, a second groove is provided on a side surface of the sealing member close to the screw head, and a second sealing ring is provided in the second groove.

[0022] Preferably, the second fastener comprises:

[0023] a third sealing ring, provided between the fixing portion of the wiring harness and the rear end;

[0024] a wire pressing plate, arranged on the other side of the fixing portion; and

[0025] A locking piece passes through the wire pressing plate and is fixedly connected to the rear end.

[0026] Preferably, the outer diameter of the second groove is smaller than the outer diameter of the screw head.

[0027] The beneficial effects of the present invention are:

[0028] (1) The utility model fixes the inner tube, the bearing seat and the tail end assembly together by screws, thereby increasing the stability of the structure and making the entire push rod more solid. The screws are the first-level seal, and cooperate with the seal on the screws to form a second-level seal. The bottom of the seal is also provided with an O-ring, which is a third-level seal, which completely seals the inner tube and the rear end, and has a good sealing effect. In addition, sealing rings are provided on the side and the upper surface of the seal to seal the mounting hole with the screw at the rear end from the axial and radial directions respectively, further increasing the sealing performance, making the push rod work more smoothly, and improving the working efficiency of the push rod.

[0029] (2) The utility model installs a second fastener between the wiring harness and the rear end, wherein the wire pressing plate cooperates with the locking member to fix the wiring harness, making the wiring harness more stable and preventing deviation and shaking, and the third sealing ring can achieve sealing between the wiring harness and the rear end, thereby further increasing the sealing of the entire push rod, making the push rod more stable as a whole and improving the working efficiency of the push rod.

[0030] (3) The utility model is assembled by combining screws with seals and is combined with the installation of a second fastener. The whole process is simple to operate and easy to use. In addition, the utility model has a simple structure and is easy to assemble and disassemble.

[0031] In summary, the utility model has the advantages of good sealing effect, high working efficiency, simple structure and easy disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0033] Figure 2 It is a side sectional view of the utility model;

[0034] Figure 3 for Figure 1 A magnified view of point A;

[0035] Figure 4 for Figure 1 Enlarged view of point B;

[0036] Figure 5 It is a cross-sectional view of the present invention.

[0037] Figure markings: 1-screw assembly; 2-motor assembly; 21-inner cylinder; 22-bearing seat; 3-front end assembly; 4-packaging assembly; 5-outer cylinder; 6-tail end assembly; 61-rear end; 611-stepped hole; 612-first step; 613-second step; 62-first fastener; 621-screw; 63-seal; 631-protrusion; 632-first groove; 633-first sealing ring; 634-second groove; 635-second sealing ring; 64-wiring; 641-fixing portion; 65-second fastener; 651-third sealing ring; 652-wire pressing plate; 653-locking piece; 66-O-ring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0040] Example

[0041] like Figure 1-5As shown, this embodiment provides a linear push rod sealing structure, including: a screw assembly 1, a motor assembly 2 arranged at one end of the screw assembly 1, a front end assembly 3 sleeved on the outside of the screw assembly 1, a packaging assembly 4 sleeved on the outside of the front end assembly 3, an outer cylinder 5 sleeved on the outer periphery of the motor assembly 2, and a tail end assembly 6 arranged at the end of the motor assembly 2, the inner cylinder 21 of the motor assembly 2 and the rear end 61 of the tail end assembly 6 are fixed by a first fastener 62, the first fastener 62 and the rear end 61 are sealed by a seal 63, a second fastener 65 is provided between the wiring harness 64 of the tail end assembly 6 and the rear end 61, and the wiring harness is sealed by the first fastener 65.

[0042] Among them, the first fastener 62 includes a plurality of screws 621, and the screws 621 pass through the inner cylinder 21 and are fixedly connected to the bearing seat 22 of the motor assembly 2, that is, the screws 621 fix the bearing seat 22, the inner cylinder 21 and the rear end 61 together. Preferably, there are three screws 621, which increases the stability of its structure and makes the entire push rod more secure. The screws 621 have a good fixing effect and are easy to disassemble and install.

[0043] At the same time, the sealing member 63 is correspondingly sleeved on the screw 621, and the upper surface of the sealing member 63 is arranged close to the head of the screw 621. The screw 621 and the sealing member 63 cooperate with each other to form a double-layer seal, which is equivalent to forming two lines of insurance, which is easy to assemble, simple to operate and easy to use.

[0044] In this embodiment, a plurality of stepped holes 611 are correspondingly provided on the rear end 61 . The stepped holes 611 are sequentially formed with a first step 612 and a second step 613 . The sealing member 63 is closely disposed on the first step 612 .

[0045] In this embodiment, an O-ring 66 is provided between the protrusion 631 at the bottom of the sealing member 63 and the second step 613, and the outer diameter of the protrusion is equal to the inner diameter of the second step 613. The O-ring 66 is a primary seal, and the sealing member 63 is a secondary seal. The two-stage seal makes the connection between the rear end 61 and the screw 621 tighter and has a good sealing effect, further ensuring the sealing between the inner cylinder 21 and the rear end 61, making the push rod work more smoothly and improving work efficiency.

[0046] In this embodiment, a first groove 632 is provided on the side of the sealing member 63, a first sealing ring 633 is provided in the first groove 632, a radial seal is formed between the first sealing ring 633 and the rear end 61, and a second groove 634 is provided on the side surface of the sealing member 63 close to the head of the screw 621, a second sealing ring 635 is provided in the second groove 634, an axial seal is formed between the second sealing ring 635 and the screw 621, and sealing is performed from two directions to maximize the sealing effect of the inner cylinder 21 and ensure good sealing performance.

[0047] Of course, the second fastener 65 includes: a third sealing ring 651 arranged between the fixing portion 641 of the wiring harness 64 and the rear end 61, a wire pressing plate 652 arranged on the other side of the fixing portion 641, and a locking member 653. The locking member 653 passes through the wire pressing plate 652 and is fixedly connected to the rear end 61, that is, the wiring harness 64 is sealed from two directions of the fixing portion 641, further strengthening the sealing between the inner tube 21 and the rear end 61, ensuring the overall sealing, enabling the push rod to work normally, and improving the working efficiency of the push rod.

[0048] In addition, the outer diameter of the second groove 634 is smaller than the outer diameter of the head of the screw 621, that is, the head of the screw 621 completely covers the second groove 634, avoiding the second groove 634 being directly exposed to the outside, resulting in poor sealing between the screw 621 and the seal 63.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A linear push rod sealing structure, comprising: Screw assembly; A motor assembly is arranged at one end of the screw assembly; A front end assembly is sleeved on the outside of the screw assembly; A packaging component, which is sleeved on the outside of the front-end component; An outer cylinder is sleeved on the outer periphery of the motor assembly; as well as A tail end assembly, arranged at the end of the motor assembly; It is characterized in that the inner cylinder of the motor assembly is fixed to the rear end of the tail end assembly by a first fastener, the first fastener and the rear end are sealed by a seal, and a second fastener is provided between the wiring harness of the tail end assembly and the rear end.

2. A linear push rod sealing structure according to claim 1, characterized in that: The first fastener includes a plurality of screws, and the screws penetrate through the inner cylinder and are fixedly connected to the bearing seat of the motor assembly.

3. A linear push rod sealing structure according to claim 2, characterized in that: The sealing member is correspondingly sleeved on the screw, and the upper surface of the sealing member is arranged close to the head of the screw.

4. A linear push rod sealing structure according to claim 3, characterized in that: A plurality of stepped holes are correspondingly arranged on the rear end, and the stepped holes are sequentially formed with a first step and a second step.

5. A linear push rod sealing structure according to claim 4, characterized in that: The sealing component is closely disposed on the first step.

6. A linear push rod sealing structure according to claim 4, characterized in that: An O-ring is arranged between the protruding portion at the bottom of the sealing member and the second step.

7. A linear push rod sealing structure according to claim 1, characterized in that: A first groove is arranged on the side surface of the sealing member, and a first sealing ring is arranged in the first groove.

8. A linear push rod sealing structure according to claim 3, characterized in that: A second groove is arranged on a surface of one side of the sealing member close to the screw head, and a second sealing ring is arranged in the second groove.

9. A linear push rod sealing structure according to claim 1, characterized in that: The second fastener comprises: a third sealing ring, arranged between the fixing portion of the wiring harness and the rear end; A wire pressing plate, arranged on the other side of the fixing portion; and A locking piece passes through the wire pressing plate and is fixedly connected to the rear end.

10. A linear push rod sealing structure according to claim 8, characterized in that: The outer diameter of the second groove is smaller than the outer diameter of the screw head.

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