Small-sized pavement milling machine with handrail damping function
By designing a multi-layered shock-absorbing component on a small road milling machine, including a lightweight alloy handrail, shock-absorbing springs, and rubber elastic blocks, the problem of hand numbness and muscle strain caused by high-frequency vibration is solved, and the operating accuracy and processing stability are improved.
Patent Information
- Application Number
- CN202522573886.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-12-04
AI Technical Summary
During operation, the high-frequency vibration of existing small road milling machines causes numbness and muscle strain in the operator's hands, affecting the accuracy of operation and the stability of processing.
It adopts a multi-layer shock absorption component, including a lightweight alloy handrail body, shock absorption spring, inclined plate slider structure and rubber elastic block, which absorbs vibration energy through multi-angle transformation and elastic deformation, reducing the amplitude of vibration transmitted to the hand-held body.
It significantly reduces the intensity of vibration perceived by the operator's hands, avoids hand numbness and muscle strain, and ensures the stability and accuracy of road milling.
Smart Images
Figure CN223780687U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of road milling technology, and in particular to a small road milling machine with handrail shock absorption function. Background Technology
[0002] As one of the core pieces of equipment in asphalt and concrete pavement maintenance, road milling machines are widely used for road surface roughening, old layer removal, defect treatment, and surface leveling. Driven by an engine, the milling rotor rotates at high speed, using cutters on the rotor to directly contact and cut the road surface material, achieving refined treatment of old pavements. Among them, small road milling machines, due to their compact size and high mobility, demonstrate irreplaceable advantages in narrow working conditions such as municipal alleys, courtyard floors, and bridge repairs, becoming the preferred equipment for small-scale maintenance projects. However, in actual operation, the continuous contact between the milling rotor and the hard road surface generates severe vibrations. These vibrations are directly transmitted to the operating handle through the machine frame. Since small milling machines mostly use a hand-held operating mode, operators need to hold the handle for extended periods to control the direction and depth of the equipment. High-frequency vibrations can cause numbness and muscle strain in the operator's hands, affecting operational accuracy and thus the stability of the road milling process. Utility Model Content
[0003] The technical problem to be solved by this utility model is that the existing technology has the disadvantage that the operator needs to hold the handrail for a long time to control the direction and depth of the equipment. High-frequency vibration will cause numbness and muscle strain in the operator's hands, affecting the accuracy of operation and thus affecting the stability of road milling. To this end, we propose a small road milling machine with handrail shock absorption function.
[0004] To achieve the above objectives, this application adopts the following technical solution: a small road milling machine with handrail shock absorption function, comprising a milling machine body, a transfer wheel body and a milling cutter head installed at the lower end of the milling machine body, a handrail assembly provided at the upper end of the milling machine body, the handrail assembly comprising a handrail rod movably installed at the upper end of the milling machine body, a shock absorption component provided at the end of the handrail rod away from the milling machine body, and a hand-held body provided at the end of the shock absorption component away from the handrail rod;
[0005] The shock-absorbing assembly includes a first connecting block with one end fixedly connected to the handrail body, and a second connecting block with one end fixedly connected to the handheld body. A first inclined plate and a second inclined plate are axially connected to the end of the first connecting block near the second connecting block. A first slider is axially connected to the end of the first inclined plate away from the first connecting block. A second slider is axially connected to the end of the second inclined plate away from the first connecting block. An active channel is formed on the outer wall of the end of the second connecting block near the first connecting block. Both the first slider and the second slider are slidably connected to the inner wall of the active channel. A sliding hole is formed on the side of the first slider near the second slider. A sliding rod is slidably connected to the inner wall of the sliding hole. One end of the sliding rod is fixedly connected to the second slider. A shock-absorbing spring is sleeved on the outer wall of the sliding rod. One end of the shock-absorbing spring is fixedly connected to the first slider, and the other end of the shock-absorbing spring is fixedly connected to the second slider.
[0006] Furthermore, the first inclined plate and the second inclined plate are symmetrically distributed about the center of the first connecting block.
[0007] Furthermore, a movable groove is formed on the outer wall of the first connecting block near the second connecting block. A movable block is slidably connected to the inner wall of the movable groove. A side connecting rod is fixedly connected to the outer wall of the movable block. The end of the side connecting rod away from the movable block is fixedly connected to the second connecting block. An elastic element is fixedly connected to the end of the movable block away from the side connecting rod. The elastic element is fixedly connected to the bottom of the cavity of the movable groove away from the movable block.
[0008] Furthermore, the movable groove, movable block, side connecting rod and elastic element are each provided in two sets and are evenly distributed on both sides of the movable channel.
[0009] Furthermore, an elastic block is fixedly connected to the inner wall of the active channel.
[0010] Furthermore, the elastic block has an internally hollowed-out hemispherical structure, and the elastic block is a component made of rubber.
[0011] The technical effects and advantages of this utility model are as follows:
[0012] In this invention, after multi-layer synergistic shock absorption, the vibration amplitude transmitted to the handheld main body has been greatly reduced. When the operator holds the handheld main body, the vibration intensity perceived by the hand is significantly reduced, effectively avoiding hand numbness and muscle strain. This solves the problem that existing small milling machines mostly adopt a hand-held operation mode, where operators need to hold the handrail for a long time to control the direction and depth of the equipment. High-frequency vibration can cause numbness and muscle strain in the operator's hands, affecting the accuracy of operation and thus affecting the stability of road milling. Attached Figure Description
[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:
[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the overall planar structure of the present invention;
[0016] Figure 3 This is a schematic diagram of the handrail assembly structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the shock absorption component structure of this utility model.
[0018] Legend: 1. Milling machine body; 2. Transfer wheel body; 3. Milling cutter head; 4. Handrail assembly; 41. Handrail bar; 42. Shock absorption assembly; 43. Handheld body; 421. First connecting block; 422. Second connecting block; 423. First inclined plate; 424. Second inclined plate; 425. First slider; 426. Second slider; 427. Movable channel; 428. Sliding hole; 429. Sliding rod; 4210. Shock-absorbing spring; 4211. Movable groove; 4212. Movable block; 4213. Side connecting rod; 4214. Elastic element; 4215. Elastic block. Detailed Implementation
[0019] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.
[0020] Reference Figures 1-4 As shown, to address the problem that most existing small milling machines use a hand-held operation mode, requiring operators to hold the handle for extended periods to control the machine's direction and depth, and that high-frequency vibrations can cause numbness and muscle strain in the operator's hands, affecting operational accuracy and thus the stability of road milling, the following preferred technical solution is provided:
[0021] A small road milling machine with handrail vibration damping function includes a milling machine body 1, which serves as the core load-bearing component of the whole machine and provides the mounting base for various functional modules. A transfer wheel body 2, enabling flexible movement of the equipment, is mounted at the lower end of the milling machine body 1. A milling cutter head 3, which is the core component for road milling and generates high-frequency vibrations when impacted by the road surface during operation, is also mounted at the upper end of the milling machine body 1. A handrail assembly 4, which is directly in contact with the operator, is provided at the upper end of the milling machine body 1. This assembly is a key path for vibration transmission to the human body and includes a handrail bar movably mounted on the upper end of the milling machine body 1. The handrail body 41 includes a shock-absorbing component 42 located at the end of the handrail body 41 away from the milling machine body 1, and a handheld body 43 located at the end of the shock-absorbing component 42 away from the handrail body 41. The handrail body 41 serves as an intermediate structure connecting the milling machine body 1 and the shock-absorbing component 42, and is made of lightweight alloy material to reduce vibration transmission efficiency. The shock-absorbing component 42 is the core shock-absorbing unit, which absorbs vibration energy through structural deformation and elastic elements. The handheld body 43 is the part that the operator directly grips, and it needs to take into account both shock absorption effect and grip comfort.
[0022] The shock absorption component 42 includes a first connector 421 fixedly connected at one end to the handrail body 41, and a second connector 422 fixedly connected at one end to the handhold body 43. The first connector 421 is the vibration input end, which mainly receives the vibration transmitted by the handrail body 41, and the second connector 422 is the vibration output end, which needs to transmit the attenuated vibration to the handhold body 43. The first connecting block 421 is axially connected to the first inclined plate 423 and the second inclined plate 424 at one end near the second connecting block 422. The axial connection allows for multi-angle rotation and can convert vertical or horizontal vibrations into oblique forces to disperse the vibration direction. The first inclined plate 423 is axially connected to the first slider 425 at one end away from the first connecting block 421. The second inclined plate 424 is axially connected to the second slider 426 at one end away from the first connecting block 421. The second connecting block 422 has an active channel 427 on its outer wall at one end near the first connecting block 421. This channel provides sliding space for the first slider 425 and the second slider 426 and restricts the movement trajectory of the sliders to ensure structural stability. The first slider 425 and the second slider 426 are both slidably connected to the inner wall of the active channel 427. A sliding hole 428 is provided on the side of the first slider 425 near the second slider 426. A sliding rod 429 is slidably connected to the inner wall of the sliding hole 428. One end of the sliding rod 429 is fixedly connected to the second slider 426. The cooperation between the two ensures that the first slider 425 and the second slider 426 remain coaxial when sliding, avoiding vibration damping failure caused by structural misalignment. A damping spring 4210, which serves as the core elastic element, is sleeved on the outer wall of the sliding rod 429. One end of the spring 4210 is fixedly connected to the first slider 425, and the other end is fixedly connected to the second slider 426. When the first slider 425 and the second slider 426 slide due to vibration, the damping spring 4210 absorbs vibration energy through stretching deformation, converting mechanical energy into elastic potential energy of the damping spring 4210 before slowly releasing it, thus achieving vibration attenuation. Through this structure, the high-frequency vibration generated by the milling cutter head 3 is transmitted to the first receiving block 421 via the handrail body 41. Then, it undergoes a three-stage energy conversion process: guided by the first inclined plate 423 and the second inclined plate 424, slidable by the first slider 425 and the second slider 426, and deformed by the damping spring 4210. This reduces the vibration amplitude transmitted to the second receiving block 422, significantly decreasing the vibration intensity perceived by the hand. The first inclined plate 423 and the second inclined plate 424 are symmetrically distributed about the center of the first receiving block 421. This symmetrical structure ensures uniform force distribution on both sides, avoiding structural tilting or additional vibration caused by unilateral force.
[0023] A movable groove 4211 is formed on the outer wall of the first connecting block 421 near the second connecting block 422. This groove provides sliding space for the movable block 4212 and forms an auxiliary damping path. The movable block 4212 is slidably connected to the inner wall of the movable groove 4211. A side connecting rod 4213 is fixedly connected to the outer wall of the movable block 4212. The end of the side connecting rod 4213 away from the movable block 4212 is fixedly connected to the second connecting block 422, which can transmit the residual vibration of the second connecting block 422 to the movable block 4212. An elastic element 4214 is fixedly connected to the end of the movable block 4212 away from the side connecting rod 4213. This element is made of highly elastic polyurethane material and has both elastic and damping characteristics. When the movable block 4212 slides due to vibration, the elastic element 4214 absorbs the residual vibration energy through deformation, supplementing the damping effect of the damping spring 4210. The end of the elastic element 4214 away from the movable block 4212 is fixedly connected to the bottom of the cavity of the movable groove 4211. Two sets of movable grooves 4211, movable blocks 4212, side connecting rods 4213, and elastic elements 4214 are provided and evenly distributed on both sides of the movable channel 427. The symmetrical design on both sides further enhances the stability and comprehensiveness of shock absorption, avoids the overall shock absorption effect from the fatigue failure of a single auxiliary path, and can further improve the vibration attenuation rate, achieving dual protection of main shock absorption plus auxiliary shock absorption, effectively alleviating the numbness and muscle strain of the hands caused by the operator holding the main body 43 for a long time.
[0024] An elastic block 4215 is fixedly connected to the inner wall of the active channel 427. The elastic block 4215 has an internally hollow hemispherical structure. The hollow design can increase the elastic deformation space of the elastic block 4215, and the elastic block 4215 is a component made of rubber. Rubber has excellent elasticity and damping characteristics. When the equipment encounters road surface protrusions, sudden changes in milling depth, or other situations that cause large-amplitude vibrations, the first slider 425 and the second slider 426 will slide quickly and impact the elastic block 4215. The rubber absorbs the impact energy through instantaneous deformation, avoiding vibration rebound caused by hard contact. At the same time, the damping characteristics can quickly dissipate the impact energy, preventing large-amplitude vibrations from being transmitted to the handheld body 43. This significantly improves the shock absorption strength of the equipment in dealing with complex working conditions, ensures that the operating accuracy is not affected by sudden vibrations, and thus ensures the flatness and stability of the road milling process.
[0025] Specifically, when the small road milling machine is running, the milling cutter head 3, as the core component of road milling, comes into contact with the hard road surface and generates high-frequency vibration. First, the vibration is transmitted through the milling machine body 1 to the handrail rod 41 in the handrail assembly 4. Since the handrail rod 41 is made of lightweight alloy material, its own vibration transmission efficiency is low, which can initially weaken some vibration energy. Then the vibration continues to be transmitted to the shock absorption component 42 at the end of the handrail rod 41 and enters the core shock absorption stage.
[0026] In the damping assembly 42, the vibration first reaches the first contact block 421, which serves as the vibration input end. The first contact block 421 transmits the vibration to the first inclined plate 423 and the second inclined plate 424 connected to its shaft. With the help of the multi-angle rotation characteristics of the shaft connection, the first inclined plate 423 and the second inclined plate 424 convert the vertical or horizontal vibration into an oblique force, dispersing the vibration direction. At the same time, they transmit the vibration to the first slider 425 and the second slider 426, which are connected to their respective shafts. At this time, the first slider 425 and the second slider 426 slide in the movable channel 427 of the second contact block 422, and the two slide coaxially through the cooperation of the sliding hole 428 and the sliding rod 429 to avoid structural misalignment from affecting the damping effect. During the sliding of the slider, the damping spring 4210 sleeved on the outer wall of the sliding rod 429 is stretched. It absorbs the vibration energy through deformation, converts the mechanical energy of the vibration into its own elastic potential energy, and then slowly releases it, completing the attenuation of the vibration. At this time, most of the high-frequency vibration energy has been consumed, and the remaining small amount of residual vibration is transmitted to the second contact block 422, which serves as the vibration output end.
[0027] Next, the residual vibration on the second connecting block 422 is transmitted to the movable block 4212 through the side connecting rod 4213. The movable block 4212 slides within the movable groove 4211 of the first connecting block 421, causing the elastic element 4214 fixedly connected to it to deform. Through deformation, the elastic element 4214 further absorbs the residual vibration energy, supplementing the damping effect of the damping spring 4210.
[0028] In addition, if the equipment encounters road bumps, sudden changes in milling depth, or other situations that cause large-scale vibrations, the first slider 425 and the second slider 426 will slide rapidly within the active channel 427 and impact the elastic block 4215 fixed to the inner wall of the channel. The elastic block 4215 is made of rubber and has an internal hollow hemispherical structure. Its excellent elasticity can absorb impact energy through instantaneous deformation, avoiding vibration rebound caused by hard contact. At the same time, the damping characteristics quickly consume impact energy, preventing large-scale vibrations from being transmitted to the handheld body 43.
[0029] Ultimately, after multi-layered synergistic vibration reduction, the vibration amplitude transmitted to the handheld main body 43 has been significantly reduced. When the operator holds the handheld main body 43, the vibration intensity perceived by the hand is significantly weakened, effectively avoiding hand numbness and muscle strain. This solves the problem that most existing small milling machines adopt a hand-held operation mode, requiring operators to hold the handle for a long time to control the direction and depth of the equipment. High-frequency vibration can cause numbness and muscle strain in the operator's hands, affecting the accuracy of operation and thus affecting the stability of road milling.
[0030] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.
Claims
1. A small road milling machine with handrail shock absorption function, characterized in that, The milling machine includes a milling machine body, with a transfer wheel body and a milling cutter head installed at the lower end of the milling machine body, and a handrail assembly provided at the upper end of the milling machine body. The handrail assembly includes a handrail rod movably installed at the upper end of the milling machine body, a shock-absorbing component provided at the end of the handrail rod away from the milling machine body, and a hand-held body provided at the end of the shock-absorbing component away from the handrail rod. The shock-absorbing assembly includes a first connecting block with one end fixedly connected to the handrail body, and a second connecting block with one end fixedly connected to the handheld body. A first inclined plate and a second inclined plate are axially connected to the end of the first connecting block near the second connecting block. A first slider is axially connected to the end of the first inclined plate away from the first connecting block. A second slider is axially connected to the end of the second inclined plate away from the first connecting block. An active channel is formed on the outer wall of the end of the second connecting block near the first connecting block. Both the first slider and the second slider are slidably connected to the inner wall of the active channel. A sliding hole is formed on the side of the first slider near the second slider. A sliding rod is slidably connected to the inner wall of the sliding hole. One end of the sliding rod is fixedly connected to the second slider. A shock-absorbing spring is sleeved on the outer wall of the sliding rod. One end of the shock-absorbing spring is fixedly connected to the first slider, and the other end of the shock-absorbing spring is fixedly connected to the second slider.
2. The small road milling machine with handrail shock absorption function according to claim 1, characterized in that: The first inclined plate and the second inclined plate are symmetrically distributed about the center of the first connecting block.
3. The small road milling machine with handrail shock absorption function according to claim 1, characterized in that: The first connecting block has a movable groove on its outer wall near the second connecting block. A movable block is slidably connected to the inner wall of the movable groove. A side connecting rod is fixedly connected to the outer wall of the movable block. The end of the side connecting rod away from the movable block is fixedly connected to the second connecting block. An elastic element is fixedly connected to the end of the movable block away from the side connecting rod. The elastic element is fixedly connected to the bottom of the cavity of the movable groove away from the movable block.
4. The small road milling machine with handrail shock absorption function according to claim 3, characterized in that: The movable groove, movable block, side connecting rod and elastic element are all provided in two sets and are evenly distributed on both sides of the movable channel.
5. The small road milling machine with handrail shock absorption function according to claim 1, characterized in that: The inner wall of the active channel is fixedly connected with an elastic block.
6. The small road milling machine with handrail shock absorption function according to claim 5, characterized in that: The elastic block has an internally hollowed-out hemispherical structure and is a component made of rubber.