Linear actuator

Abstract

The linear actuator comprises a driving structure, the outer wall of the driving structure is fixedly connected with a guiding structure, the outer wall of the side, away from the driving structure, of the guiding structure is fixedly connected with a tensioning structure, and the inner wall of the guiding structure is slidably connected with a sliding structure and a synchronous belt; the two ends of the synchronous belt are fixedly connected with the sliding structures, and the inner wall of the synchronous belt is meshed with the outer walls of the driving structure and the tensioning structure; the utility model relates to the technical field of linear actuators, according to the guide structure and the sliding structure, through the matching design of the V-shaped guide rail and the idler wheel, the V-shaped inclined plane limits transverse deviation through bidirectional constraint, the motion resistance can be effectively reduced, meanwhile, the linear motion of the sliding seat can be ensured, and the magnetic strip at the top of the sliding rail tightly adsorbs a steel belt through magnetic force; a totally-closed protection structure is formed, impurities such as dust, water vapor and oil dirt can be effectively prevented from entering the sliding rail, and abrasion or clamping stagnation of core components such as the V-shaped guide rail and the synchronous belt caused by pollution is avoided.

Description

Technical Field

[0001] This utility model relates to the field of linear actuator technology, specifically to linear actuators. Background Technology

[0002] As a core component for realizing linear reciprocating motion, linear actuators are widely used in automated production lines, precision instruments, logistics conveying equipment and other fields. Their performance directly affects the operating accuracy, stability and service life of the whole machine. However, existing linear actuators still have some shortcomings in practical applications.

[0003] In terms of guiding structure, traditional linear actuators mostly adopt a single guide rail combined with a slider design, which has limited lateral constraint capability. When the slider moves, it is prone to lateral displacement due to uneven force, resulting in increased straightness deviation. During operation, vibration and noise are significant, making it difficult to meet the requirements of high-precision scenarios. At the same time, some actuators use sliding friction guides to reduce costs, which have high motion resistance and wear quickly, and the accuracy decreases significantly after long-term use. In addition, the existing guiding structure has insufficient protection performance. Most rely on simple dust covers or gap seals, which cannot effectively prevent dust, water vapor, oil and other impurities from entering the guide rail and transmission components, leading to internal component contamination, jamming and even corrosion, which seriously shortens the service life of the equipment. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a linear actuator, which solves the problems of traditional linear actuators having a simple guiding structure, limited lateral constraint capability, and easy lateral deviation due to uneven force during slider movement.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A linear actuator includes: a drive structure, a guide structure fixedly connected to the outer wall of the drive structure, a tensioning structure fixedly connected to the outer wall of the guide structure on the side away from the drive structure, a sliding structure and a timing belt slidably connected to the inner wall of the guide structure, with both ends of the timing belt fixedly connected to the sliding structure, and the inner wall of the timing belt engaging with the outer walls of the drive structure and the tensioning structure; the guide structure includes a slide rail, the inner wall of the slide rail slidably connected to the outer wall of the timing belt, a V-shaped guide rail fixedly connected to the inner wall at the bottom of the slide rail, magnetic strips symmetrically fixedly connected to the inner wall at the top of the slide rail, and a steel strip magnetically connected to the outer wall at the top of the magnetic strip.

[0009] Preferably, the sliding structure includes a slide block, a fixing plate is symmetrically fixedly connected to the outer wall of the bottom of the slide block, a support plate is fixedly connected to the outer wall of the bottom of the fixing plate, and a roller is rotatably connected to the outer wall of the bottom of the support plate.

[0010] Preferably, the outer wall of the bottom of the slide block is slidably connected to the outer wall of the top of the slide rail, the inner wall of the slide block is slidably connected to the outer wall of the steel belt, the outer wall of the roller is slidably connected to the inner wall of the side of the V-shaped guide rail, the V-shaped structure constrains the lateral offset of the roller through the inclined surfaces on both sides, ensuring that the slide block moves in a straight line, while rolling friction can reduce the resistance to movement, and the inner wall of the fixed clamp is fixedly connected to the outer wall of the timing belt by bolts.

[0011] Preferably, the drive structure includes a motor, a reducer is fixedly connected to the outer wall of the motor, a bearing housing is fixedly connected to the outer wall of the reducer, a shaft is rotatably connected to the inner wall of the bearing housing, a first synchronous pulley is fixedly connected to the outer wall of the shaft, and an end cover is fixedly connected to the outer wall of the bearing housing.

[0012] Preferably, the outer wall of the rotating shaft is rotatably connected to the inner wall of the reducer, the outer wall of the first synchronous pulley meshes with the inner wall of the synchronous belt, and the outer walls of the slide rail and steel belt are fixedly connected to the outer wall of the bearing seat. The rotation of the first synchronous pulley will drive the synchronous belt to circulate along the length of the slide rail.

[0013] Preferably, the tensioning structure includes a mounting frame, with guide plates symmetrically fixedly connected to the outer wall of the side of the mounting frame, tensioning blocks slidably connected to the inner wall of the guide plates, a second synchronous wheel rotatably connected to the inner wall of the tensioning block, an adjusting bolt rotatably connected to the inner wall of the tensioning block, a top cover fixedly connected to the outer wall of the top of the mounting frame, and a buffer block fixedly connected to the outer wall of the mounting frame.

[0014] Preferably, the outer wall of the adjusting bolt is threaded to the inner wall of the mounting frame, the outer wall of the second synchronous pulley meshes with the inner wall of the synchronous belt, and the outer wall of the buffer block contacts the outer wall of the slide. Rotating the adjusting bolt can push the tension block to slide along the guide plate, changing the distance between the second synchronous pulley and the first synchronous pulley, thereby adjusting the tension of the synchronous belt, avoiding slippage caused by the loosening of the synchronous belt, and ensuring power transmission efficiency.

[0015] (III) Beneficial Effects

[0016] This utility model provides a linear actuator. It has the following beneficial effects:

[0017] (I) This guide structure, through the design of V-shaped guide rail and roller, the V-shaped inclined surface restricts lateral displacement through bidirectional constraint, which can effectively reduce motion resistance while ensuring the linear motion of the slide. The sliding cooperation between the slide rail and the slide, and the magnetic attraction guidance between the steel belt and the magnetic strip form a double constraint, which further improves the straightness and stability of the slide movement, reduces vibration and noise. The magnetic strip at the top of the slide rail tightly attracts the steel belt through magnetic force, forming a fully enclosed protective structure, which can effectively block dust, water vapor, oil and other impurities from entering the slide rail, and avoid wear or jamming of core components such as V-shaped guide rail and synchronous belt due to contamination.

[0018] (ii) This drive structure, through the combination of motor and reducer, can precisely adjust the output speed and torque. With the meshing transmission of the first synchronous pulley and synchronous belt, slippage is avoided, ensuring power transmission efficiency. The tensioning structure can flexibly adjust the tension of the synchronous belt through adjusting bolts, which can eliminate the transmission lag caused by slack and avoid the wear of components caused by excessive tightness, thus greatly extending the service life of the synchronous belt and synchronous pulley. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a top view of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the drive structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the bearing housing of this utility model;

[0023] Figure 5 This is a schematic diagram of the tensioning structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the sliding structure of this utility model;

[0025] Figure 7 This is a schematic diagram of the guiding structure of this utility model.

[0026] In the diagram: 1. Drive structure; 11. Motor; 12. Reducer; 13. Bearing housing; 131. Shaft; 132. First synchronous pulley; 14. End cover; 2. Guide structure; 21. Slide rail; 22. V-shaped guide rail; 23. Magnetic strip; 24. Steel belt; 3. Tensioning structure; 31. Mounting frame; 32. Guide plate; 33. Tensioning block; 34. Second synchronous pulley; 35. Adjusting bolt; 36. Top cover; 37. Buffer block; 4. Sliding structure; 41. Slide seat; 42. Fixed clamping plate; 43. Support plate; 44. Roller; 5. Synchronous belt. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-7 This utility model provides a technical solution: a linear actuator, comprising: a drive structure 1, a guide structure 2 fixedly connected to the outer wall of the drive structure 1, a tensioning structure 3 fixedly connected to the outer wall of the guide structure 2 away from the drive structure 1, a sliding structure 4 and a synchronous belt 5 slidably connected to the inner wall of the guide structure 2, and the two ends of the synchronous belt 5 fixedly connected to the sliding structure 4, and the inner wall of the synchronous belt 5 engaging with the outer walls of the drive structure 1 and the tensioning structure 3; the guide structure 2 includes a slide rail 21, the inner wall of the slide rail 21 slidably connected to the outer wall of the synchronous belt 5, a V-shaped guide rail 22 fixedly connected to the inner wall at the bottom of the slide rail 21, magnetic strips 23 symmetrically fixedly connected to the inner wall at the top of the slide rail 21, and a steel strip 24 magnetically connected to the outer wall at the top of the magnetic strips 23.

[0029] The sliding structure 4 includes a slide block 41, a fixed clamping plate 42 is symmetrically fixedly connected to the outer wall of the bottom of the slide block 41, a support plate 43 is fixedly connected to the outer wall of the bottom of the fixed clamping plate 42, and a roller 44 is rotatably connected to the outer wall of the bottom of the support plate 43.

[0030] The outer wall of the bottom of the slide block 41 is slidably connected to the outer wall of the top of the slide rail 21, the inner wall of the slide block 41 is slidably connected to the outer wall of the steel belt 24, the outer wall of the roller 44 is slidably connected to the inner wall of the side of the V-shaped guide rail 22, the V-shaped structure constrains the lateral offset of the roller 44 through the inclined surfaces on both sides, ensuring that the slide block 41 moves in a straight line, while rolling friction can reduce the resistance to movement, and the inner wall of the fixed clamp 42 is fixedly connected to the outer wall of the synchronous belt 5 by bolts.

[0031] The drive structure 1 includes a motor 11, a reducer 12 is fixedly connected to the outer wall of the motor 11, a bearing housing 13 is fixedly connected to the outer wall of the reducer 12, a rotating shaft 131 is rotatably connected to the inner wall of the bearing housing 13, a first synchronous pulley 132 is fixedly connected to the outer wall of the rotating shaft 131, and an end cover 14 is fixedly connected to the outer wall of the bearing housing 13.

[0032] The outer wall of the rotating shaft 131 is rotatably connected to the inner wall of the reducer 12, the outer wall of the first synchronous pulley 132 meshes with the inner wall of the synchronous belt 5, and the outer walls of the slide rail 21 and the steel belt 24 are fixedly connected to the outer wall of the bearing seat 13. The rotation of the first synchronous pulley 132 will drive the synchronous belt 5 to circulate along the length of the slide rail 21.

[0033] The tensioning structure 3 includes a mounting frame 31. Guide plates 32 are symmetrically fixedly connected to the outer wall of the side of the mounting frame 31. Tensioning blocks 33 are slidably connected to the inner wall of the guide plates 32. A second synchronous wheel 34 is rotatably connected to the inner wall of the tensioning blocks 33. An adjusting bolt 35 is rotatably connected to the inner wall of the tensioning blocks 33. A top cover 36 is fixedly connected to the outer wall of the top of the mounting frame 31. A buffer block 37 is fixedly connected to the outer wall of the mounting frame 31.

[0034] The outer wall of the adjusting bolt 35 is threadedly connected to the inner wall of the mounting frame 31. The outer wall of the second synchronous pulley 34 meshes with the inner wall of the synchronous belt 5. The outer wall of the buffer block 37 contacts the outer wall of the slide block 41. Rotating the adjusting bolt 35 can push the tension block 33 to slide along the guide plate 32, changing the distance between the second synchronous pulley 34 and the first synchronous pulley 132, thereby adjusting the tension of the synchronous belt 5, avoiding slippage caused by the loosening of the synchronous belt 5, and ensuring power transmission efficiency.

[0035] In use, the drive structure 1 provides the power source for the entire device, the sliding structure 4 will achieve linear displacement along the guide structure 2 through the movement of the synchronous belt 5, and the tensioning structure 3 ensures transmission stability by adjusting the tension of the synchronous belt 5.

[0036] After the motor 11 starts, the power is reduced by the reducer 12, which reduces the speed and increases the torque. The power is then transmitted to the rotating shaft 131 in the bearing housing 13, which drives the first synchronous pulley 132 on the rotating shaft 131 to rotate synchronously. Since the outer wall of the first synchronous pulley 132 meshes with the inner wall of the synchronous belt 5, and the synchronous belt 5 forms a closed loop through the second synchronous pulley 34 of the tensioning structure 3, the rotation of the first synchronous pulley 132 will drive the synchronous belt 5 to circulate along the length of the slide rail 21.

[0037] The fixed clamp 42 of the sliding structure 4 is fixedly connected to the outer wall of the synchronous belt 5 by bolts. Therefore, when the synchronous belt 5 moves in a cycle, it will drive the slide block 41 to move synchronously through the fixed clamp 42. The slide block 41 is the main body of the sliding structure 4. Its movement direction is constrained by the slide rail 21, and finally realizes linear movement along the slide rail 21. The outer wall of the roller 44 of the sliding structure 4 is slidably connected to the inner wall of the side of the V-shaped guide rail 22. The V-shaped structure constrains the lateral offset of the roller 44 through the inclined surfaces on both sides, ensuring that the slide block 41 moves in a straight line. At the same time, rolling friction can reduce the movement resistance. The bottom outer wall of the slide block 41 is slidably connected to the top outer wall of the slide rail 21. The slide rail 21 serves as the basic frame and provides longitudinal support for the slide block 41. The magnetic strip 23 at the top of the slide rail 21 attracts the steel strip 24 through magnetic force. The steel strip 24 covers the opening of the slide rail 21. The inner wall of the slide block 41 slides with the outer wall of the steel strip 24, which not only helps to constrain the longitudinal movement trajectory of the slide block 41, but also seals the inside of the slide rail 21 through the steel strip 24 to prevent dust and other objects from entering.

[0038] The tension block 33 slides within the guide plate 32. The second synchronous pulley 34 on its inner wall engages with the synchronous belt 5. Rotating the adjusting bolt 35 can push the tension block 33 to slide along the guide plate 32, changing the distance between the second synchronous pulley 34 and the first synchronous pulley 132, thereby adjusting the tension of the synchronous belt 5, avoiding slippage caused by the slack of the synchronous belt 5, ensuring power transmission efficiency, and the buffer block 37 prevents the slide block 41 from directly colliding with the mounting frame 31, providing a buffering effect.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A linear actuator, characterized in that, include: A drive structure (1) is fixedly connected to a guide structure (2) on its outer wall. A tensioning structure (3) is fixedly connected to the outer wall of the guide structure (2) on the side away from the drive structure (1). A sliding structure (4) and a synchronous belt (5) are slidably connected to the inner wall of the guide structure (2). The two ends of the synchronous belt (5) are fixedly connected to the sliding structure (4). The inner wall of the synchronous belt (5) meshes with the outer walls of the drive structure (1) and the tensioning structure (3). The guide structure (2) includes a slide rail (21), the inner wall of the slide rail (21) is slidably connected to the outer wall of the synchronous belt (5), a V-shaped guide rail (22) is fixedly connected to the inner wall at the bottom of the slide rail (21), a magnetic strip (23) is symmetrically fixedly connected to the inner wall at the top of the slide rail (21), and a steel strip (24) is magnetically connected to the outer wall at the top of the magnetic strip (23).

2. The linear actuator according to claim 1, characterized in that: The sliding structure (4) includes a slide (41), a fixed clamp (42) is symmetrically fixedly connected to the outer wall of the bottom of the slide (41), a support plate (43) is fixedly connected to the outer wall of the bottom of the fixed clamp (42), and a roller (44) is rotatably connected to the outer wall of the bottom of the support plate (43).

3. The linear actuator according to claim 2, characterized in that: The outer wall of the bottom of the slide block (41) is slidably connected to the outer wall of the top of the slide rail (21), the inner wall of the slide block (41) is slidably connected to the outer wall of the steel belt (24), the outer wall of the roller (44) is slidably connected to the inner wall of the side of the V-shaped guide rail (22), and the inner wall of the fixed clamp (42) is fixedly connected to the outer wall of the synchronous belt (5) by bolts.

4. The linear actuator according to claim 1, characterized in that: The drive structure (1) includes a motor (11), a reducer (12) is fixedly connected to the outer wall of the motor (11), a bearing seat (13) is fixedly connected to the outer wall of the reducer (12), a rotating shaft (131) is rotatably connected to the inner wall of the bearing seat (13), a first synchronous pulley (132) is fixedly connected to the outer wall of the rotating shaft (131), and an end cover (14) is fixedly connected to the outer wall of the bearing seat (13).

5. The linear actuator according to claim 4, characterized in that: The outer wall of the rotating shaft (131) is rotatably connected to the inner wall of the reducer (12), the outer wall of the first synchronous pulley (132) meshes with the inner wall of the synchronous belt (5), and the outer walls of the slide rail (21) and the steel belt (24) are fixedly connected to the outer wall of the bearing seat (13).

6. The linear actuator according to claim 1, characterized in that: The tensioning structure (3) includes a mounting frame (31), a guide plate (32) is symmetrically fixedly connected to the outer wall of the side of the mounting frame (31), a tensioning block (33) is slidably connected to the inner wall of the guide plate (32), a second synchronous wheel (34) is rotatably connected to the inner wall of the tensioning block (33), an adjusting bolt (35) is rotatably connected to the inner wall of the tensioning block (33), a top cover (36) is fixedly connected to the outer wall of the top of the mounting frame (31), and a buffer block (37) is fixedly connected to the outer wall of the mounting frame (31).

7. The linear actuator according to claim 6, characterized in that: The outer wall of the adjusting bolt (35) is threadedly connected to the inner wall of the mounting frame (31), the outer wall of the second synchronous pulley (34) meshes with the inner wall of the synchronous belt (5), and the outer wall of the buffer block (37) contacts the outer wall of the slide (41).

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