CN219774783U

CN219774783U - Linear actuator sealing structure and linear actuator

Info

Publication number: CN219774783U
Application number: CN202321156046.3U
Authority: CN
Inventors: 赵灿林; 束国浩
Original assignee: Wuxi Hongba Electromechanical Co ltd
Current assignee: Wuxi Hongba Electromechanical Co ltd
Priority date: 2023-05-11
Filing date: 2023-05-11
Publication date: 2023-09-29
Anticipated expiration: 2033-05-11

Abstract

The utility model relates to a linear actuator sealing structure and a linear actuator. The utility model comprises a shell, a transmission shell and a gear box connected with the transmission shell, wherein the gear box is provided with a first internal thread structure; the transmission shaft penetrates through the transmission shell and is connected with a transmission shaft gear arranged in the shell; the bearing seat is provided with an outer tube with an external thread structure matched with the first internal thread structure and a second internal thread structure matched with the external thread structure; the inner tube is sleeved in the outer tube; the screw rod is sleeved in the inner tube and is rotationally connected with the bearing seat, the screw rod is connected with a screw rod gear meshed with the transmission shaft gear, and the screw rod is slidably connected with a screw nut connected with the inner tube. According to the utility model, the outer pipe and the gear box are respectively in threaded fit with the bearing seat and are sealed through the first sealing ring and the second sealing ring, so that the waterproof performance is improved, water is prevented from entering the actuator, and the service life is prolonged.

Description

Linear actuator sealing structure and linear actuator

Technical Field

The utility model relates to the technical field of photovoltaic brackets, in particular to a linear actuator sealing structure and a linear actuator.

Background

At present, a power input end of a linear actuator of a photovoltaic support is generally arranged on a hinged support of a photovoltaic support upright post, the position of the power input end is close to the ground, the upper end of the power input end is arranged on a rotating shaft rocker arm of the photovoltaic support, and the power input end is adjusted to a set light incidence angle of a photovoltaic panel through telescopic movement of the linear actuator, so that an optimal angle is formed between a photovoltaic module and the sun, and the light energy is maximally converted into electric energy.

The tail of the linear actuator of the existing photovoltaic support is poor in waterproof effect, so that the linear actuator can remove internal water, corrode internal parts and influence service life.

Disclosure of Invention

Therefore, the utility model aims to solve the technical problems that the tail pulling structure part of the linear actuator of the existing photovoltaic bracket is poor in waterproof effect, so that the linear actuator can remove internal water, corrode internal parts and influence the service life.

In order to solve the above technical problems, the present utility model provides a linear actuator sealing structure, including:

the shell comprises a transmission shell and a gear box connected with the transmission shell, wherein the gear box is provided with a first internal thread structure;

the transmission shaft penetrates through the transmission shell and is connected with a transmission shaft gear arranged in the shell;

the bearing seat is provided with an external thread structure matched with the first internal thread structure;

the outer tube is provided with a second internal thread structure matched with the external thread structure;

the inner tube is sleeved in the outer tube;

the screw rod is sleeved in the inner tube and is rotationally connected with the bearing seat, the screw rod is connected with a screw rod gear meshed with the transmission shaft gear, and the screw rod is slidably connected with a screw nut connected with the inner tube.

In one embodiment of the utility model, the bearing seat extends circumferentially to form an annular protrusion, a first sealing ring and a second sealing ring are respectively arranged on two sides of the external thread structure, the first sealing ring is arranged between the gear box and the annular protrusion, and the second sealing ring is arranged between the outer pipe and the annular protrusion.

In one embodiment of the utility model, the screw rod axially extends to form a connecting shaft which is rotationally connected with the bearing seat, the screw rod gear is connected with the connecting shaft, the connecting shaft is provided with a first shaft sleeve and a second shaft sleeve, and a first thrust ball bearing, a self-lubricating bearing and a second thrust ball bearing are sequentially arranged on the first shaft sleeve and the second shaft sleeve and positioned in the bearing seat.

In one embodiment of the utility model, the transmission housing is arranged through the gear box and comprises two mounting ends extending from the gear box, a circlip for a shaft, a framework oil seal and an end cover are arranged between the transmission shaft and the mounting ends, the end cover compresses the framework oil seal on the circlip for the shaft, and an annular sleeve is arranged between the end cover and the gear box.

In one embodiment of the utility model, the transmission housing and the gear box are both in a tubular structure, a sheath sleeved on the screw rod gear is arranged in the gear box body, the transmission housing is provided with a shell notch, one end of the sheath abuts against the bearing seat, and the other end of the sheath is provided with an annular notch which is attached to the shell notch.

The utility model also provides a linear actuator, which comprises the linear actuator sealing structure.

In one embodiment of the present utility model, further comprising:

the tail pulling seat is connected with the shell;

and the plug is plugged at one end of the inner tube far away from the shell.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

according to the linear actuator sealing structure and the linear actuator, the outer tube and the gear box are respectively in threaded fit with the bearing seat and are sealed through the first sealing ring and the second sealing ring, so that the waterproof performance is improved, water is prevented from entering the actuator, and the service life is prolonged.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.

Fig. 1 is a schematic cross-sectional view of a linear actuator of the present utility model.

Fig. 2 is a schematic view of the linear actuator seal structure of the present utility model.

Fig. 3 is a schematic view of the other end structure of the linear actuator of the present utility model.

Fig. 4 is a schematic view of the jacket structure of the present utility model.

Description of the specification reference numerals:

1. a housing; 2. a transmission shaft; 3. a drive shaft gear; 4. a tail pulling seat; 5. an outer tube; 6. an inner tube; 7. a screw rod; 8. a screw rod gear; 9. a nut; 10. a first seal ring; 11. a second seal ring; 12. a plug; 13. a guide sleeve; 14. sealing a framework; 15. a front end retainer ring; 16. an O-shaped sealing ring; 17. a flat key; 18. a bearing seat; 19. a connecting shaft; 20. a first sleeve; 21. a second sleeve; 22. a first thrust ball bearing; 23. self-lubricating bearings; 24. a second thrust ball bearing; 25. a transmission housing; 26. a gear box; 27. circlips for shafts; 28. a framework oil seal; 29. an end cap; 30. an annular sleeve; 31. and (3) a sheath.

Description of the embodiments

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

In the present utility model, if directions (up, down, left, right, front and rear) are described, they are merely for convenience of description of the technical solution of the present utility model, and do not indicate or imply that the technical features must be in a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, "a plurality of" means one or more, and "a plurality of" means two or more, and "greater than", "less than", "exceeding", etc. are understood to not include the present number; "above", "below", "within" and the like are understood to include this number. In the description of the present utility model, the description of "first" and "second" if any is used solely for the purpose of distinguishing between technical features and not necessarily for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the present utility model, unless clearly defined otherwise, terms such as "disposed," "mounted," "connected," and the like should be construed broadly and may be connected directly or indirectly through an intermediate medium, for example; the connecting device can be fixedly connected, detachably connected and integrally formed; can be mechanically connected, electrically connected or capable of communicating with each other; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.

Referring to fig. 1 to 4, a linear actuator sealing structure of the present utility model includes:

the shell 1 comprises a transmission shell 25 and a gear box 26 connected with the transmission shell 25, wherein the gear box 26 is provided with a first internal thread structure;

a transmission shaft 2 passing through the transmission housing 25 and connected with a transmission shaft gear 3 provided in the housing 1;

a bearing seat 18 provided with an external thread structure which is matched with the first internal thread structure;

an outer tube 5 provided with a second internal thread structure cooperating with the external thread structure;

the inner tube 6 is sleeved in the outer tube 5;

the screw rod 7 is sleeved in the inner tube 6 and is rotationally connected to the bearing seat 18, the screw rod 7 is connected with a screw rod gear 8 meshed with the transmission shaft gear 3, and the screw rod 7 is slidably connected with a screw nut 9 connected with the inner tube 6.

Specifically, the bearing seat 18 extends circumferentially to form an annular protrusion, the annular protrusion is provided with a first sealing ring 10 and a second sealing ring 11 on two sides of the external thread structure, the first sealing ring 10 is disposed between the gear box 26 and the annular protrusion, and the second sealing ring 11 is disposed between the outer tube 5 and the annular protrusion.

Specifically, the screw rod 7 extends axially to form a connecting shaft 19 rotatably connected to the bearing seat 18, the screw rod gear 8 is connected to the connecting shaft 19, the connecting shaft 19 is sleeved with a first shaft sleeve 20 and a second shaft sleeve 21, and a first thrust ball bearing 22, a self-lubricating bearing 23 and a second thrust ball bearing 24 are sequentially arranged on the first shaft sleeve 20 and the second shaft sleeve 21 and located in the bearing seat 18.

Specifically, the transmission housing 25 is disposed through the gear case 26 and includes two mounting ends extending from the gear case 26, a circlip 27 for a shaft, a skeleton oil seal 28, and an end cover 29 are disposed between the transmission shaft 2 and the mounting ends, the end cover 29 compresses the skeleton oil seal on the circlip 27 for a shaft, and an annular sleeve 30 is disposed between the end cover 29 and the gear case 26.

Specifically, the transmission housing 25 and the gear case 26 are both in tubular structures, a sheath 31 sleeved on the lead screw gear 8 is arranged in the gear case 26, the transmission housing 25 is provided with a notch of the housing 1, one end of the sheath 31 abuts against the bearing seat 18, and the other end of the sheath 31 is provided with an annular notch attached to the notch of the housing 1.

A linear actuator comprising the linear actuator sealing structure, further comprising:

a tail pulling seat 4 connected to the shell 1;

the plug 12, the plug 12 shutoff in the one end that inner tube 6 kept away from casing 1, the plug 12 in the part of inner tube 6 is equipped with the slot along circumference, be equipped with O type sealing washer 16 in the slot, inner tube 6 is close to the one end of plug 12 with form the cavity between the outer tube 5, the cavity is equipped with sealing device, sealing device including the cover locate guide sleeve 13 and the skeleton seal 14 of inner tube 6 and with outer tube 5 threaded connection's front end retaining ring 15, front end retaining ring 15 will skeleton seal 14 and guide sleeve 13 compress tightly in the cavity.

Through the arrangement, the outer tube 5 and the gear box 26 are respectively in threaded fit with the bearing seat 18 and are sealed through the first sealing ring 10 and the second sealing ring 11, so that the waterproof performance is improved, water is prevented from entering the actuator, and the service life is prolonged. Penetrating a transmission shell 25 preassembled with an end cover 29 and an annular sleeve 30 at one end into a gear box 26 body, and preassembling the annular sleeve 30 and the end cover 29 at the other end of the transmission shell 25; the sheath 31 is arranged in the gear box 26 body, so that the annular notch of the sheath 31 is attached to the notch of the shell 1 of the transmission shell 1 to limit the transmission shell 1, and the gear box 26 body is screwed with the bearing seat 18; the sheath 31 is attached to the plane of the bearing seat 18, the gear is surrounded by the sheath 31, and can normally work and rotate, the sheath 31 is fixed, and two ends of the preassembled transmission shell 25 are fixed. The gear grease can be protected from being lost, the maintenance cost is saved, and the service life is prolonged; the annular notch structure is attached to the notch of the shell 1, sand dust and rainwater are prevented from entering, and the inner structure is protected.

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present utility model.

Claims

1. A linear actuator seal structure, comprising:

the shell (1) comprises a transmission shell (25) and a gear box (26) connected with the transmission shell (25), wherein the gear box (26) is provided with a first internal thread structure;

a transmission shaft (2) which passes through the transmission housing (25) and is connected with a transmission shaft gear (3) arranged in the shell (1);

a bearing seat (18) provided with an external thread structure matched with the first internal thread structure;

an outer tube (5) provided with a second internal thread structure cooperating with the external thread structure;

the inner tube (6) is sleeved in the outer tube (5);

the screw rod (7) is sleeved in the inner tube (6) and is rotationally connected to the bearing seat (18), the screw rod (7) is connected with a screw rod gear (8) meshed with the transmission shaft gear (3), and the screw rod (7) is slidably connected with a screw nut (9) connected with the inner tube (6).

2. The linear actuator sealing structure according to claim 1, wherein the bearing seat (18) extends circumferentially with annular protrusions, the annular protrusions are provided with a first sealing ring (10) and a second sealing ring (11) respectively on two sides of the external thread structure, the first sealing ring (10) is arranged between the gear box (26) and the annular protrusions, and the second sealing ring (11) is arranged between the outer tube (5) and the annular protrusions.

3. The linear actuator sealing structure according to claim 1, wherein the screw rod (7) is axially extended with a connecting shaft (19) rotatably connected to the bearing seat (18), the screw rod gear (8) is connected to the connecting shaft (19), the connecting shaft (19) is sleeved with a first shaft sleeve (20) and a second shaft sleeve (21), and a first thrust ball bearing (22), a self-lubricating bearing (23) and a second thrust ball bearing (24) are sequentially arranged on the first shaft sleeve (20) and the second shaft sleeve (21) and located in the bearing seat (18).

4. The linear actuator sealing structure according to claim 1, wherein the transmission housing (25) is arranged through the gear box (26) in a penetrating manner and comprises two mounting ends extending from the gear box (26), a shaft circlip (27), a skeleton oil seal (28) and an end cover (29) are arranged between the transmission shaft (2) and the mounting ends, the end cover (29) tightly presses the skeleton oil seal (28) on the shaft circlip (27), and an annular sleeve (30) is arranged between the end cover (29) and the gear box (26).

5. The linear actuator sealing structure according to claim 1, wherein the transmission housing (25) and the gear case (26) are both in tubular structures, a sheath (31) sleeved on the lead screw gear (8) is arranged in the gear case (26), the transmission housing (25) is provided with a notch of the housing (1), one end of the sheath (31) abuts against the bearing seat (18), and an annular notch attached to the notch of the housing (1) is arranged at the other end of the sheath.

6. A linear actuator comprising the linear actuator seal structure of any one of claims 1-5.

7. The linear actuator of claim 6, further comprising: the tail pulling seat (4) is connected to the shell (1);

the plug (12) is plugged at one end of the inner tube (6) far away from the shell (1).