A trimming device for rubber product manufacturing

By designing a trimming device consisting of a rotating assembly, a pressure plate assembly, and a support assembly, the problem of the inability to adjust the size of rubber product trimming devices was solved, thus improving trimming accuracy and stability and reducing production costs.

CN224296347UActive Publication Date: 2026-05-29CHANGZHOU CHUXIN INSULATION NEW MATERIALS CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHANGZHOU CHUXIN INSULATION NEW MATERIALS CO LTD
Filing Date
2025-06-12
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing rubber product trimming devices cannot adjust their size according to the diameter of round rubber products, resulting in insufficient trimming accuracy and stability, and increasing production and time costs.

Method used

A trimming device comprising a rotating component, a pressure plate component, and a support component is designed. The rotating component is used to drive the rubber product to rotate, the pressure plate component can be adjusted in size according to the diameter, and the support component is used to support and connect the pressure plate component to ensure stable pressing.

Benefits of technology

It enables automatic adjustment of the pressure plate size according to the diameter of the rubber product, improving trimming accuracy and stability, and reducing production and time costs.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224296347U_ABST
    Figure CN224296347U_ABST
Patent Text Reader

Abstract

The utility model relates to rubber product manufacturing technical field, specifically disclose a kind of rubber product manufacturing is used to trim device, include: trim device ontology, still include: rotating component, rotating component is set in trim device ontology middle part, rotating component is used to drive rubber product rotation, platen component, platen component is set in trim device ontology upper portion, platen component is used to carry out pressing limit to the rubber product placed in rotating component upper portion. By being provided with rotating component, can drive circular rubber product rotation when trimming circular rubber product, then it is convenient for worker to trim rubber product, by being provided with platen component, can adjust the size of platen component according to the diameter of circular rubber product, then utilize platen component to press rubber product, to facilitate worker to trim rubber product, by being provided with support component, platen component can be supported and connected to support component.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of rubber product manufacturing technology, specifically to a trimming device for manufacturing rubber products. Background Technology

[0002] In the rubber product manufacturing industry, trimming is an indispensable and crucial process. During the molding process, factors such as the mold parting line and injection port will cause defects such as burrs and flash to form on the edges of rubber products. These defects not only affect the appearance quality of the rubber products, making them look rough and unsightly, but may also cause a series of problems during subsequent assembly and use. For example, burrs may get stuck between assembled parts, making assembly difficult or even impossible; burrs may scratch other parts or personnel in contact with them, reducing the reliability and safety of the product. In addition, uneven edges can also affect the sealing performance of rubber products. For some products with high sealing requirements, such as rubber sealing rings and gaskets, edge defects may lead to leakage, affecting the normal operation of equipment. Therefore, trimming rubber products is an important step in ensuring product quality, improving product performance, and extending product lifespan.

[0003] However, existing rubber product trimming devices have room for improvement when handling round rubber products of different sizes. Traditional trimming devices have fixed pressure plate sizes, which often fail to provide good adaptability when dealing with round rubber products of varying diameters. For rubber products with smaller diameters, the fixed-size pressure plate may not be able to completely cover their edges, causing the rubber products to easily move or wobble during the trimming process, affecting the trimming accuracy and quality. For rubber products with larger diameters, the pressure plate may not be able to provide sufficient pressure distribution, similarly failing to guarantee trimming stability. This necessitates frequent pressure plate changes for different sized rubber products in actual production, increasing production and time costs. Furthermore, positioning deviations during pressure plate changes may further affect trimming accuracy. Therefore, we propose a trimming device for rubber product manufacturing. Utility Model Content

[0004] The purpose of this invention is to provide a trimming device for manufacturing rubber products, so as to solve the problem mentioned in the background art that the pressure plate cannot be adjusted according to the diameter of the circular rubber product.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a trimming device for manufacturing rubber products, comprising: a trimming device body,

[0006] It also includes: a rotating assembly, which is located in the middle of the trimming device body and is used to drive the rubber product to rotate;

[0007] The pressure plate assembly is located on the upper part of the trimming device body and is used to press and limit the rubber product placed on the upper part of the rotating assembly.

[0008] Several support components are arranged on the upper part of the trimming device body. The support components are used to support and connect the pressure plate assembly.

[0009] The pressure plate assembly includes an electric push rod 1, several telescopic rods 1 and several telescopic rods 2. The upper part of the electric push rod 1 is fixedly connected to the upper part of the trimming device body. The upper parts of the several telescopic rods 1 are all fixedly connected to the upper part of the trimming device body. The piston rod output end of the telescopic rod 1 is fixedly connected to the pressure plate body 2. The upper parts of the several telescopic rods 2 are all fixedly connected to the upper part of the trimming device body. The piston rod output end of the telescopic rod 2 is fixedly connected to the pressure plate body 1. Several snap-fit ​​components are fixedly connected in a ring array to the upper parts of the pressure plate body 2 and the upper parts of the pressure plate body 1. The piston rod output end of the electric push rod 1 is fixedly connected to the pressure plate body 3. The upper part of the pressure plate body 3 is provided with push rod components in a ring array. The push rod components are used to connect with adjacent snap-fit ​​components.

[0010] The push rod assembly includes a support plate two that is fixedly connected to the upper end of the pressure plate body three. An electric push rod two is provided on the side of the support plate two near the snap-fit ​​assembly. Several limiting blocks are fixedly connected in a ring array at the upper end of the pressure plate body three. An electromagnet one is fixedly connected to the output end of the piston rod of the electric push rod two. The piston rod of the electric push rod two is slidably connected to the limiting block.

[0011] The snap-fit ​​assembly includes a support block, a pressure plate body 2 whose upper end is fixedly connected to the lower end of an adjacent support block, a pressure plate body 1 whose upper end is fixedly connected to the lower end of an adjacent support block, a docking block 1 whose side of the support block is close to the push rod assembly, a docking block 2 whose side of the support block is far from the push rod assembly, a T-shaped block whose inner cavity is symmetrically slidably connected to the support block, a guide rod whose inner cavity is symmetrically fixedly connected to the support block, an outer surface of the guide rod whose outer surface is slidably connected to an adjacent T-shaped block, a spring 1 whose outer surface is fitted on each guide rod, and two sides of the spring 1 on the same side whose opposite sides are fixedly connected to the docking block 2 and the T-shaped block respectively, a slide rod whose side of the two T-shaped blocks is close to each other, an electromagnet 2 whose side of the slide rod is far from the push rod assembly, and a magnet whose side of the slide rod is close to the push rod assembly.

[0012] The support assembly includes two connecting plates, the upper ends of which are fixedly connected to the upper part of the trimming device body. One of the connecting plates has a controller on one side. Both connecting plates have a connecting block fixedly connected to their lower parts. Several plug-in components are fixedly connected to the sides of the two connecting blocks that are close to each other.

[0013] The plug-in assembly includes a connecting block two that is fixedly connected to the connecting block one. A shell is fixedly connected to the inner cavity of the connecting block two. A magnetic plug rod is slidably connected to the inner cavity of the shell. A spring two is sleeved on the outer surface of the magnetic plug rod. An electromagnet three is provided on the side of the inner cavity of the shell away from the snap-fit ​​assembly. The two sides of the spring two are fixedly connected to the side of the inner cavity of the shell close to the snap-fit ​​assembly and the side of the spring two away from the snap-fit ​​assembly, respectively.

[0014] The rotating assembly includes a slider that is rotatably connected to the body of the trimming device. A turntable is fixedly connected to the upper end of the slider. A connecting shaft is fixedly connected to the middle of the lower end of the turntable. A gear is fixedly connected to the lower end of the connecting shaft. A gear is meshed with one side of the lower part of the gear. A connecting shaft is fixedly connected to the side of the gear away from the gear. A support plate is rotatably connected to the side of the connecting shaft away from the gear. The support plate is fixedly connected to the body of the trimming device. A motor is provided on the side of the support plate away from the gear. The output shaft of the motor is fixedly connected to the connecting shaft.

[0015] This utility model has at least the following beneficial effects:

[0016] By incorporating a rotating component, the circular rubber product can be rotated during trimming, facilitating trimming by the worker. The pressure plate component allows for adjustment of its size according to the diameter of the circular rubber product, enabling pressing and further facilitating trimming. A support component supports and connects the pressure plate component, preventing the device from falling and causing unnecessary damage when not in use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall structure of the present utility model. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the overall structure of the present utility model. Figure 3 ;

[0020] Figure 4 This is a schematic diagram of the pressure plate assembly of this utility model;

[0021] Figure 5 This is a schematic diagram of the push rod assembly of this utility model. Figure 1 ;

[0022] Figure 6 This is a schematic diagram of the push rod assembly of this utility model. Figure 2 ;

[0023] Figure 7 This is a schematic diagram of the snap-fit ​​assembly of this utility model;

[0024] Figure 8 This is a schematic diagram of the support component of this utility model;

[0025] Figure 9 This is a schematic diagram of the plug-in assembly of this utility model;

[0026] Figure 10 This is a schematic diagram of the rotating component of this utility model.

[0027] In the diagram: 1. Trimming device body; 2. Rotating assembly; 21. Slider; 22. Turntable; 23. Connecting shaft one; 24. Gear one; 25. Gear two; 26. Connecting shaft two; 27. Support plate one; 28. Motor; 3. Pressure plate assembly; 31. Electric push rod one; 32. Telescopic rod one; 33. Push rod assembly; 331. Support plate two; 332. Electric push rod two; 333. Electromagnet one; 334. Limiting block; 34. Snap-fit ​​assembly; 341. Support block; 342. Connecting block one; 3 43. Sliding rod; 344. T-block; 345. Guide rod; 346. Spring 1; 347. Connecting block 2; 348. Electromagnet 2; 349. Magnet; 35. Pressure plate body 1; 36. Pressure plate body 3; 37. Pressure plate body 2; 38. Telescopic rod 2; 4. Support assembly; 41. Connecting plate; 42. Controller; 43. Connecting block 1; 44. Plug-in assembly; 441. Connecting block 2; 442. Housing; 443. Magnetic plug rod; 444. Spring 2; 445. Electromagnet 3. Detailed Implementation

[0028] 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.

[0029] Example 1

[0030] Please see Figures 1 to 10 This utility model provides a technical solution: a trimming device for manufacturing rubber products, comprising: a trimming device body 1.

[0031] It also includes: a rotating component 2, which is located in the middle of the trimming device body 1 and is used to drive the rubber product to rotate;

[0032] Pressure plate assembly 3 is disposed on the upper part of the trimming device body 1. Pressure plate assembly 3 is used to press and limit the rubber product placed on the upper part of the rotating assembly 2.

[0033] Several support components 4 are disposed on the upper part of the trimming device body 1. The support components 4 are used to support and connect the pressure plate assembly 3.

[0034] By incorporating a rotating component 2, the circular rubber product can be rotated during trimming, facilitating trimming by the worker. By incorporating a pressure plate component 3, the size of the pressure plate component 3 can be adjusted according to the diameter of the circular rubber product, and the pressure plate component 3 is used to press the rubber product, facilitating trimming by the worker. By incorporating a support component 4, the pressure plate component 3 is supported and connected, preventing the device from falling and causing unnecessary damage when not in use.

[0035] The pressure plate assembly 3 includes an electric push rod 31, several telescopic rods 32, and several telescopic rods 38. The upper part of the electric push rod 31 is fixedly connected to the upper part of the trimming device body 1. The upper parts of the several telescopic rods 32 are all fixedly connected to the upper part of the trimming device body 1. The piston rod output end of the telescopic rod 32 is fixedly connected to the pressure plate body 37. The upper parts of the several telescopic rods 38 are all fixedly connected to the upper part of the trimming device body 1. The piston rod output end of the telescopic rod 38 is fixedly connected to the pressure plate body 35. Several snap-fit ​​components 34 are fixedly connected in a circular array to the upper parts of the pressure plate body 37 and the upper parts of the pressure plate body 35. The piston rod output end is fixedly connected to the pressure plate body 36. The upper part of the pressure plate body 36 is provided with a push rod assembly 33 in an annular array. The push rod assembly 33 is used to connect with the adjacent snap-fit ​​assembly 34. The push rod assembly 33 includes a support plate 2 331 fixedly connected to the upper end of the pressure plate body 36. The support plate 2 331 is provided with an electric push rod 2 332 on the side near the snap-fit ​​assembly 34. Several limit blocks 334 are fixedly connected to the upper end of the pressure plate body 36 in an annular array. The piston rod output end of the electric push rod 2 332 is fixedly connected to an electromagnet 1 333. The piston rod of the electric push rod 2 332 is slidably connected to the limit block 334.

[0036] The snap-fit ​​assembly 34 includes a support block 341. The upper end of the pressure plate body 37 is fixedly connected to the lower end of the adjacent support block 341. The upper end of the pressure plate body 35 is fixedly connected to the lower end of the adjacent support block 341. A first mating block 342 is fixedly connected to the side of the support block 341 near the push rod assembly 33. A second mating block 347 is fixedly connected to the side of the support block 341 away from the push rod assembly 33. T-shaped blocks 344 are symmetrically slidably connected to the inner cavity of the support block 341. Guide rods are symmetrically fixedly connected to the inner cavity of the support block 341. 345, the outer surface of the guide rod 345 is slidably connected to the adjacent T-block 344, and the outer surface of the guide rod 345 is fitted with a spring 346. The two sides of the spring 346 on the same side are fixedly connected to the opposite surfaces of the docking block 347 and the T-block 344, respectively. The two T-blocks 344 are fixedly connected to a slide rod 343 on the side that is close to each other. The side of the slide rod 343 away from the push rod assembly 33 is fixedly connected to an electromagnet 348. The side of the slide rod 343 close to the push rod assembly 33 is provided with a magnet 349.

[0037] The support assembly 4 includes two connecting plates 41. The upper ends of the two connecting plates 41 are fixedly connected to the upper part of the trimming device body 1. A controller 42 is provided on one side of one of the connecting plates 41. A connecting block 43 is fixedly connected to the lower part of both connecting plates 41. Several plug-in assemblies 44 are fixedly connected to the side of the two connecting blocks 43 that are close to each other. The plug-in assembly 44 includes a connecting block 441 that is fixedly connected to the connecting block 43. A shell 442 is fixedly connected to the inner cavity of the connecting block 441. A magnetic rod 443 is slidably connected to the inner cavity of the shell 442. A spring 444 is sleeved on the outer surface of the magnetic rod 443. An electromagnet 445 is provided on the side of the inner cavity of the shell 442 away from the snap-fit ​​assembly 34. The two sides of the spring 444 are fixedly connected to the side of the inner cavity of the shell 442 that is close to the snap-fit ​​assembly 34 and the side of the spring 444 that is away from the snap-fit ​​assembly 34, respectively.

[0038] When trimming a round rubber product, the product is placed on a turntable 22. Based on the product's diameter, the controller 42 simultaneously controls the operation of the electric push rod 332. The piston rod of the electric push rod 332 pushes the electromagnet 333 towards the inner cavity of the adjacent magnet 349 and slide rod 343. This pushes the electromagnet 333 into the slide rod 343. Since the slide rod 343 contains a magnet 349, energizing the electromagnet 348 generates a magnetic force that attracts the magnet 349, improving connection stability. When the pressure plate body 35 needs to move downwards, the controller 42 controls the electric push rod 332, and the push rod assembly 33 pushes... The adjacent slide rod 343 moves towards the slide rod 343 located above the pressure plate body 35. When the slide rod 343 moves, it will drive the T-block 344 to move in the cavity of the support block 341, and then drive the spring 346 to contract. When the electromagnet 348 enters the cavity of the slide rod 343 located above the pressure plate body 35, by energizing the electromagnet 348, a magnetic force will be generated, which can magnetically attract the magnet 349 located above the pressure plate body 35, thereby connecting the entire snap-fit ​​assembly 34 together. Through the cooperation of the docking block 347 and the docking block 342, the electromagnet 333 or the slide rod 343 located above the pressure plate body 37 can be limited, and then the device can drive the pressure plate body 35 and the pressure plate body 37 to move downward together, and then press the rubber product.

[0039] After adjusting the size of the pressure plate assembly 3 according to the diameter of the circular rubber product, it is necessary to drive the pressure plate assembly 3 to press the rubber product. Before driving the pressure plate assembly 3 to move downward, the controller 42 controls the operation of the electromagnet 3 445. When the electromagnet 3 445 is energized, it generates a magnetic force that attracts the magnetic rod 443. This causes the magnetic rod 443 to move towards the electromagnet 3 445 within the inner cavity of the outer shell 442. This then stretches the spring 2 444, separating the magnetic rod 443 from the adjacent mating block 1 342 or mating block 2 347. This releases the position restriction on the snap-fit ​​assembly 34. Then, the controller 42 controls the operation of the electric push rod 1 31. The piston rod of the electric push rod 31 pushes the pressure plate body 36 downward, which in turn drives several push rod assemblies 33 downward. Then, the push rod assemblies 33 drive several locking assemblies 34 downward together. Next, the locking assemblies 34 drive the pressure plate body 1 35 and pressure plate body 2 37 downward together. When the pressure plate body 1 35 and pressure plate body 2 37 move downward, the telescopic rod 32 will extend, thereby preventing the pressure plate body 1 35 or pressure plate body 2 37 from falling off the device. Thus, by using the cooperation of the pressure plate body 36, pressure plate body 1 35 and pressure plate body 2 37, the device can be used to press round rubber products of different diameters, thereby improving its practicality and versatility.

[0040] Example 2

[0041] The rotating assembly 2 includes a slider 21 rotatably connected to the trimming device body 1. A turntable 22 is fixedly connected to the upper end of the slider 21. A connecting shaft 23 is fixedly connected to the middle of the lower end of the turntable 22. A gear 24 is fixedly connected to the lower end of the connecting shaft 23. A gear 25 is meshed with one side of the lower part of the gear 24. A connecting shaft 26 is fixedly connected to the side of the gear 25 away from the gear 24. A support plate 27 is rotatably connected to the side of the connecting shaft 26 away from the gear 25. The support plate 27 is fixedly connected to the trimming device body 1. A motor 28 is provided on the side of the support plate 27 away from the gear 25. The output shaft of the motor 28 is fixedly connected to the connecting shaft 26.

[0042] After pressing the rubber product, the worker can manually trim the edges. After trimming one side of the rubber product, the controller 42 drives the pressure plate assembly 3 to move upward, releasing the pressure on the rubber product. Then, the controller 42 controls the motor 28 to run, using the output shaft of the motor 28 to drive the connecting shaft 26 to rotate. The connecting shaft 26 then drives the gear 25 to mesh with the adjacent gear 24, causing the gear 24 to rotate. Then, through the cooperation of the connecting shaft 23 and the gear 24, the turntable 22 can be driven to rotate slowly, causing the rubber product placed on the turntable 22 to rotate. Due to the friction of the rubber product itself and the slow rotation speed, displacement of the rubber product can be prevented during rotation. After adjusting the rotation of the rubber product, the pressure plate assembly 3 is driven to press the rubber product again, and then the worker trims the edges of the rubber product.

[0043] 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 process, method, article, or apparatus.

[0044] 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 trimming device for manufacturing rubber products, comprising: Trimming device body, Its features include: a rotating assembly, which is disposed in the middle of the trimming device body and is used to drive the rubber product to rotate; A pressure plate assembly is disposed on the upper part of the trimming device body, and the pressure plate assembly is used to press and limit the rubber product placed on the upper part of the rotating assembly. A plurality of support components are disposed on the upper part of the trimming device body, the support components being used to support and connect the pressure plate assembly.

2. The trimming device for manufacturing rubber products according to claim 1, characterized in that: The pressure plate assembly includes an electric push rod 1, several telescopic rods 1 and several telescopic rods 2. The upper part of the electric push rod 1 is fixedly connected to the upper part of the trimming device body. The upper parts of the several telescopic rods 1 are jointly fixedly connected to the upper part of the trimming device body. The piston rod output end of the telescopic rod 1 is fixedly connected to the pressure plate body 2. The upper parts of the several telescopic rods 2 are jointly fixedly connected to the upper part of the trimming device body. The piston rod output end of the telescopic rod 2 is fixedly connected to the pressure plate body 1. Several snap-fit ​​components are fixedly connected in a circular array to the upper parts of the pressure plate body 2 and the upper parts of the pressure plate body 1. The piston rod output end of the electric push rod 1 is fixedly connected to the pressure plate body 3. The upper part of the pressure plate body 3 is provided with push rod assemblies in a circular array. The push rod assemblies are used to connect with adjacent snap-fit ​​components.

3. The trimming device for manufacturing rubber products according to claim 2, characterized in that: The push rod assembly includes a support plate two fixedly connected to the upper end of the pressure plate body three. An electric push rod two is provided on the side of the support plate two near the snap-fit ​​assembly. Several limiting blocks are fixedly connected in a circular array at the upper end of the pressure plate body three. An electromagnet one is fixedly connected to the piston rod output end of the electric push rod two. The piston rod of the electric push rod two is slidably connected to the limiting block.

4. The trimming device for manufacturing rubber products according to claim 2, characterized in that: The snap-fit ​​assembly includes a support block. The upper end of the pressure plate body two is fixedly connected to the lower end of the adjacent support block. The upper end of the pressure plate body one is fixedly connected to the lower end of the adjacent support block. A docking block one is fixedly connected to the side of the support block near the push rod assembly. A docking block two is fixedly connected to the side of the support block away from the push rod assembly. T-shaped blocks are symmetrically slidably connected to the inner cavity of the support block. Guide rods are symmetrically fixedly connected to the inner cavity of the support block. The outer surface of the guide rod is slidably connected to the adjacent T-shaped block. A spring one is sleeved on the outer surface of the guide rod. The two sides of the spring one on the same side are fixedly connected to the opposite surfaces of the docking block two and the T-shaped block, respectively. A sliding rod is fixedly connected to the side of the two T-shaped blocks that are close to each other. An electromagnet two is fixedly connected to the side of the sliding rod away from the push rod assembly. A magnet is provided on the side of the sliding rod near the push rod assembly.

5. The trimming device for manufacturing rubber products according to claim 1, characterized in that: The support assembly includes two connecting plates, the upper ends of which are fixedly connected to the upper part of the trimming device body. One of the connecting plates is provided with a controller on one side. A connecting block is fixedly connected to the lower part of each of the two connecting plates. Several plug-in components are fixedly connected to the sides of the two connecting blocks that are close to each other.

6. The trimming device for manufacturing rubber products according to claim 5, characterized in that: The plug-in assembly includes a second connecting block fixedly connected to the first connecting block. The inner cavity of the second connecting block is fixedly connected to a housing. A magnetic plug rod is slidably connected to the inner cavity of the housing. A second spring is sleeved on the outer surface of the magnetic plug rod. An electromagnet is provided on the side of the inner cavity of the housing away from the snap-fit ​​assembly. The two sides of the second spring are fixedly connected to the side of the inner cavity of the housing near the snap-fit ​​assembly and the side of the second spring away from the snap-fit ​​assembly, respectively.

7. The trimming device for manufacturing rubber products according to claim 1, characterized in that: The rotating assembly includes a slider rotatably connected to the body of the trimming device. A turntable is fixedly connected to the upper end of the slider. A connecting shaft is fixedly connected to the middle of the lower end of the turntable. A gear is fixedly connected to the lower end of the connecting shaft. A gear is meshed with one side of the lower part of the gear. A connecting shaft is fixedly connected to the side of the gear away from the gear. A support plate is rotatably connected to the side of the connecting shaft away from the gear. The support plate is fixedly connected to the body of the trimming device. A motor is provided on the side of the support plate away from the gear. The output shaft of the motor is fixedly connected to the connecting shaft.