Lifting device for side shields of a paver

Abstract

The application discloses a paving machine side baffle lifting device and paving machine in the technical field of paving machine side baffle, and aims to solve the problems of slow lifting baffle lifting response speed, unsmooth lifting sliding and abnormal sound in the prior art. It comprises: a motor driving screw lifting device makes the lifting baffle slide along the lifting direction and the lifting frame, the control sensitivity is high and the reaction is flexible, the long sliding block is used for the sliding connection of the sliding groove, the contact area is large, and the abnormal sound and friction are reduced in addition to preventing the plate body from falling out, the lifting baffle is supported by at least two lifting frames and the screw lifting device, the connecting point of the screw and the fixed frame is located between the two supporting points of the fixed frame, and the structure reliability of the supporting frame and the lifting baffle is high; the motor is connected with the paving machine control panel electric signal, and the control of the lifting baffle is integrated into the control system of the paving machine.

Description

Technical Field

[0001] This invention relates to a paver side guard lifting device and a paver, belonging to the field of paver side guard technology. Background Technology

[0002] Due to operational requirements, the screed area of ​​a paver has a certain unfolded width. During paving operations, material must be blocked on both sides of the auger distribution area, and the side guards are functional components that serve this purpose. The side guards are raised and lowered to adapt to the position of the road surface. Currently, paver side guard lifting devices include manual and hydraulic types. Given the high temperature of the paved surface, and the fact that the side guard lifting devices are made of metal, manually adjusting the threaded screw can easily cause burns and fatigue for personnel. Hydraulic paver side guard lifting devices generally draw power from the paver's hydraulic system, resulting in a slow response time. The paving process takes place on the roadbed, and existing roadbed construction processes adjust the elevation at each stage to accommodate paving operations; therefore, the roadbed height is frequently adjusted relative to the design height. There are exaggerated cumulative elevation errors of several centimeters, exceeding the design error range of the roadbed surface. It is difficult to encounter such errors in current technology when paving operations are carried out according to the design elevation of the roadbed. In actual construction, the paving process requires the driver to constantly adjust the height of the baffles according to the rapidly changing actual elevation of the roadbed and the design elevation of the pavement surface. The hydraulic method has a transmission delay, and experienced drivers need to anticipate the amount of time to eliminate the effect of the transmission delay and form the paved asphalt material at the appropriate height on the roadbed. Obviously, the manual and hydraulic side baffle lifting devices of the paver are not conducive to standardized and efficient paving operations. In addition, the lifting baffles are positioned by clamping steel plates together, and friction noise and even jamming are easy to occur during the up and down sliding of the plates. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a paver sideboard lifting device with fast response speed and smooth lifting and sliding, and a paver that integrates sideboard lifting control into the vehicle control system.

[0004] To achieve the above objectives, the present invention is implemented using the following technical solution: In a first aspect, a paver sidestop lifting device includes: The support frame connected to the paver includes a main boom and lifting frames, with at least two lifting frames connected to the main boom, and also includes a fixing frame, with at least two support points of the fixing frame fixed to adjacent lifting frames; The screw lifting device installed on the support frame includes a first bearing installed on the main arm and a second bearing installed between two adjacent support points of the fixed frame. It also includes a screw and a motor that is driven by the screw. The two support ends of the screw are respectively connected to the support frame through the first bearing and the second bearing. The motor is fixedly connected to the support frame. The lifting sleeve is fitted into the screw. A lifting baffle that is slidably connected to the lifting frame includes a plate body, and a threaded sleeve seat that is fixedly connected to the lifting threaded sleeve is provided on the side of the plate body facing the support frame; The lifting frame has a sliding groove along the lifting direction, and the side of the plate facing the support frame is provided with a long slider that slides and engages with the sliding groove; or, the lifting frame is provided with a long slider along the lifting direction, and the side of the plate facing the support frame is provided with a sliding groove that slides and engages with the long slider.

[0005] In some embodiments of the first aspect, the groove includes a dovetail groove, and the elongated slider includes a dovetail slider that matches the shape of the dovetail groove.

[0006] In some embodiments of the first aspect, the lifting frame is connected to the dovetail groove by a plurality of first bolts, and the plate is connected to the dovetail slider by a plurality of second bolts.

[0007] In some embodiments of the first aspect, the screw lifting device further includes a bearing housing, the bearing housing including a first mounting surface connected to the main boom or the fixed frame, the first bearing or the second bearing being mounted on the first mounting surface; It also includes a second mounting surface for mounting the motor, through which the drive shaft of the motor passes, and a coupling is fixedly connected to the end of the drive shaft. The lead screw passes through the first bearing or the second bearing and is connected to the coupling for transmission.

[0008] In some embodiments of the first aspect, the motor includes a stepper motor, and the lead screw lifting device includes a control box electrically connected to the stepper motor.

[0009] In some embodiments of the first aspect, the plate is provided with a dumbbell-shaped reinforcing plate, the portion of the reinforcing plate near the lifting frame having an increased area.

[0010] In some embodiments of the first aspect, at least one of the following is included: The first mounting surface is connected to the main boom, the first bearing is mounted on the first mounting surface, and the lead screw passes through the first bearing and is connected to the coupling for transmission. The control box is located on the main arm.

[0011] In some embodiments of the first aspect, the fixed frame is parallel to the main boom, the lifting frame is perpendicular to the fixed frame and the main boom, the second bearing is installed at the midpoint of two adjacent support points of the fixed frame, and the lifting frame is symmetrically distributed about the lead screw axis; The threaded sleeve seat is located on the center line of the lifting baffle.

[0012] In some embodiments of the first aspect, the lifting sleeve and the sleeve seat are connected by a plurality of third bolts.

[0013] In a second aspect, the present invention also provides a paver, including the paver side guard lifting device as described in any one of the first aspects, wherein the motor is electrically connected to the paver control panel.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The paver side baffle lifting device provided by the present invention uses a motor-driven screw lifting device to make the lifting baffle slide relative to the lifting frame along the lifting direction. It has high control sensitivity and flexible response. The long slider has a large contact area for sliding connection of the chute, which not only prevents the plate from falling off but also reduces abnormal noise and friction. The support frame supports the lifting baffle through at least two lifting frames and the screw lifting device. The connection point between the screw and the fixed frame is located in the middle of the two support points of the fixed frame. The structure of the support frame and the lifting baffle has high reliability. The paver provided by this invention has its motor and paver control panel connected by electrical signals, thereby integrating the control of the lifting baffle into the paver's control system. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of the paver side guard lifting device provided in Embodiment 1 of the present invention; Figure 2 yes Figure 1 Exploded view; Figure 3 yes Figure 2 A schematic diagram of the lead screw lifting device, dovetail slider, and dovetail groove; Figure 4 yes Figure 1 Schematic diagram of lead screw rotation; Figure 5 yes Figure 4 Schematic diagram of plate lifting and lowering after lead screw rotation; Figure 6 yes Figure 5 Rear view; In the picture: 1-Support frame; 1.1-Main boom; 1.2-Fixed frame; 1.3-Lifting frame; 1.4-Slide groove; 1.4.1-Dovetail groove; 1.4.2-First bolt; 2-Screw lifting device; 2.1-Screw; 2.2-Lifting sleeve; 2.3-First bearing; 2.4-Motor; 2.4.1-Stepper motor; 2.5-Coupling; 2.6-Second bearing; 2.6.1-Fifth bolt; 2.7-Control box; 2.8-Bearing housing; 2.8.1-First mounting surface; 2.8.2-Second mounting surface; 2.8.3-Fourth bolt; 3-Lifting baffle; 3.1-Plate body; 3.1.1-Second bolt; 3.2-Long strip slider; 3.2.1-Dovetail slider; 3.3-Reinforcing plate; 3.4-Threaded sleeve seat; 3.4.1-Third bolt. Detailed Implementation

[0016] The technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of this application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other. Example 1

[0017] This embodiment provides a side baffle lifting device for a paver to solve the problems of slow response speed and abnormal noise during lifting in the prior art.

[0018] refer to Figures 1 to 6The paver sidewall lifting device provided in this embodiment includes a support frame 1 connected to the paver, a screw lifting device 2 installed on the support frame 1, and a lifting baffle 3 that blocks the paving material. The support frame 1 is used to support and transmit the weight of the paver sidewall lifting device and the lateral pressure of the paving material. The support frame 1 includes a main boom 1.1 and lifting frames 1.3. The main boom 1.1 is the foundation of the support frame 1. At least two lifting frames 1.3 are connected to the main boom 1.1, which can be welded, riveted, bolted, or snap-fitted. This embodiment only shows the case where two lifting frames 1.3 are perpendicularly intersecting and connected to the main boom 1.1. In other embodiments, the lifting frames... The intersection angle between the two lifting frames 1.3 and the main boom 1.1 can be non-right angle. The upper ends of the two lifting frames 1.3 are connected to the main boom 1.1, and the lower middle parts of the two lifting frames 1.3 are connected and fixed to the two support points of the fixed frame 1.2. The fixed frame 1.2, the lifting frames 1.3, and the main boom 1.1 form a stable load-bearing frame. The screw lifting device 2 realizes the function of the paver side panel lifting device through the screw principle, including a first bearing 2.3 installed on the main boom 1.1 and a second bearing 2.6 installed on the fixed frame 1.2. The position of the second bearing 2.6 is in the middle of the two support points of the fixed frame 1.2 to improve the load-bearing capacity of the fixed frame 1.2. The first bearing 2.3... The second bearing 2.6 is used to mount and fix the two support ends of the lead screw 2.1, thereby mounting the lead screw 2.1 on the support frame 1. The lead screw 2.1 rotates within the first bearing 2.3 and the second bearing 2.6. A motor 2.4 is installed on the support frame 1, and the housing of the motor 2.4 is fixed to the support frame 1. The lead screw 2.1 is driven by the motor 2.4. A lifting sleeve 2.2 is sleeved on the lead screw 2.1, which can move up and down due to the rotation of the lead screw 2.1. The lifting baffle 3 includes a plate body 3.1 that blocks the paving material. On the side of the plate body 3.1 facing the support frame 1, at a position corresponding to the lifting sleeve 2.2, a sleeve seat 3 is fixedly connected to the lifting sleeve 2.2. 4. In some embodiments of this invention, the threaded sleeve seat 3.4 and the lifting threaded sleeve 2.2 are connected by multiple third bolts 3.4.1. Furthermore, the lifting baffle 3 is slidably connected to the lifting frame 1.3. Specifically, the lifting frame 1.3 may have a groove 1.4 along the lifting direction, and the side of the plate 3.1 facing the support frame 1 may have a long slider 3.2 that slides and engages with the groove 1.4 at a position corresponding to the groove 1.4. Alternatively, the lifting frame 1.3 may have a long slider 3.2 along the lifting direction, and the side of the plate 3.1 facing the support frame 1 may have a groove 1.4 that slides and engages with the long slider 3.2 at a position corresponding to the long slider 3.2. (See reference...) Figure 4 The motor 2.4 drives the lead screw 2.1 to rotate within the first bearing 2.3 and the second bearing 2.6. (Reference) Figure 5 and Figure 6The lifting sleeve 2.2 is obstructed from rotating due to the fixing of the sleeve seat 3.4. The lifting sleeve 2.2 moves up and down on the screw 2.1. When the lifting sleeve 2.2 drives the plate 3.1 to move up and down via the sleeve seat 3.4, the long slider 3.2 slides within the groove 1.4. Unlike the locking and sliding between steel plates, the long slider 3.2 has a large sliding contact area with the groove 1.4, effectively solving the problems of friction noise and jamming. (Reference) Figure 2 and Figure 3 The long slider 3.2 and the slide groove 1.4 can be directly purchased as finished industrial products: dovetail sliders 3.2.1 and dovetail grooves 1.4.1. Dovetail sliders 3.2.1 and dovetail grooves 1.4.1 are mature and reliable shelving products. Compared to the simple interlocking sliding of steel plates, they produce less noise and slide more smoothly. Furthermore, the interlocking cross-sectional shape of the dovetail sliders 3.2.1 and dovetail grooves 1.4.1 resists the lateral pressure of the paving material, preventing the plate 3.1 from detaching from the support frame 1 under the pressure of the paving material. The dovetail groove 1.4.1 can be connected to the lifting frame 1.3 using multiple first bolts 1.4.2, and the dovetail slider 3.2.1... The plate 3.1 is connected to the plate body 3.1 via multiple second bolts 3.1.1; the lifting screw sleeve 2.2 is fixedly connected to the screw sleeve seat 3.4, and the dovetail slider 3.2.1 is slidably connected to the dovetail groove 1.4.1. The plate body 3.1 is reliably supported by the support frame 1 on both sides and in the middle, and is subjected to linear force on both sides in a central point shape, effectively preventing deformation of the plate body 3.1. Part of the weight of the plate body 3.1 is directly transmitted to the main arm 1.1 through the screw 2.1 above the lifting screw sleeve 2.2, and another part of the weight is transmitted to the fixed frame 1.2 through the screw 2.1 below the lifting screw sleeve 2.2, and then transmitted to the main arm 1.1 by the two adjacent lifting frames 1.3. The arm is 1.1mm long, and the stress distribution is good. Typically, the paving material is transported to the site at an angle of at least 150°. The baffle structures are all made of high-temperature resistant metal. The existing method of manually adjusting the baffle height using threaded screws can easily cause burns. Freshly paved asphalt contains many volatile toxic substances, and personnel fatigue can easily lead to errors when adjusting the height. The paving material is laid on the subgrade and compacted to reach the design height of the driving surface. Therefore, the elevation errors accumulated from the structural layers to the subgrade must be eliminated uniformly in the asphalt pavement layer. This requires adjusting the thickness of the paving material every few tens of centimeters or one meter using the lifting baffles. Lowering the height requires a high level of skill from the operator or driver. However, hydraulically driven lifting baffle structures have a low response speed and require advance prediction. The paver side baffle lifting device provided in this embodiment is driven by a 2.4-speed motor. The current speed is faster than that of hydraulic transmission, and the response speed of the 2.4-speed motor is also faster than that of hydraulic cylinders, which require hydraulic oil pressure to be transmitted to the piston surface. The response rate is timely and the adjustment accuracy is high. The adjustment tolerance is also smaller than that of hydraulic cylinders, which can realize micro-motion operation. It is suitable for high-precision paving material thickness control in places such as test tracks and airport runways. The 2.4-speed motor is controlled by electrical signals, making it easier to integrate into the paver's control system.

[0019] refer to Figure 3 The lead screw lifting device 2 includes a bearing housing 2.8, which has at least two mounting surfaces. In this embodiment, an inverted groove is used. An inner region is formed between the inner surfaces of the first mounting surface 2.8.1 and the second mounting surface 2.8.2 of the bearing housing 2.8. The first mounting surface 2.8.1 of the bearing housing 2.8 is connected to the main arm 1.1. The first bearing 2.3 is mounted on the inner or outer surface of the first mounting surface 2.8.1, or the first mounting surface 2.8.1 is connected to the fixed frame 1.2. The second bearing... Bearing 2.6 is mounted on the inner or outer surface of the first mounting surface 2.8.1; the second mounting surface 2.8.2 is used to mount the motor 2.4, which can be mounted on the outer surface of the second mounting surface 2.8.2. The drive shaft of the motor 2.4 passes through the second mounting surface 2.8.2 and enters the inner region. The end of the drive shaft of the motor 2.4 is fixedly connected to the coupling 2.5. The lead screw 2.1 passes through the first bearing 2.3 or the second bearing 2.6 and then enters the inner region to drive the coupling 2.5. (Reference) Figure 1 In this embodiment, considering that the weight of the screw lifting device 2 is ultimately borne by the main boom 1.1, and that placing the bearing seat 2.8 on the fixed frame 1.2 could easily cause asphalt particles to jam the coupling 2.5, the bearing seat 2.8 is placed on the upper part of the main boom 1.1, referring to... Figure 2 The outer side of the first mounting surface 2.8.1 is connected and fixed to the upper part of the main boom 1.1 by multiple fourth bolts 2.8.3. The first bearing 2.3 is located on the inner surface of the first mounting surface 2.8.1. The motor 2.4 is arranged upward. The lead screw 2.1 passes through the first mounting surface 2.8.1 and the first bearing 2.3 and is connected to the coupling 2.5 for transmission.

[0020] refer to Figure 1 Considering that the middle part of the plate 3.1 is relatively open and is prone to deformation when transmitting force, a dumbbell-shaped reinforcing plate 3.3 is set on the open surface of the plate 3.1. The area of ​​the reinforcing plate 3.3 near the lifting frame 1.3 is increased. Further shapes can be designed through finite element modeling analysis.

[0021] The well-organized support frame 1 facilitates the even distribution of force; therefore, the fixed frame 1.2 is arranged parallel to the main boom 1.1, and the lifting frame 1.3 is perpendicular to the fixed frame 1.2 and the main boom 1.1. (Refer to...) Figure 2The second bearing 2.6 is installed at the midpoint of two adjacent support points of the fixed frame 1.2 via multiple fifth bolts 2.6.1. In this embodiment, since the support points of the fixed frame 1.2 are at both ends, the fifth bolts 2.6.1 are also located at the midpoint of the long side of the fixed frame 1.2. The lifting frame 1.3 is axially symmetrically distributed about the lead screw 2.1. Since this embodiment only describes the case of two lifting frames 1.3 symmetrically distributed about the lead screw 2.1, the two lifting frames 1.3 are symmetrically distributed between the fixed frame 1.2 and the main boom 1.1. On both sides, the fixed frame 1.2, the main boom 1.1, and the two lifting frames 1.3 form a symmetrical rectangular frame. In some preferred embodiments, the screw sleeve seat 3.4 is located on the center line of gravity of the lifting baffle 3. The center line of gravity of the lifting baffle 3 coincides with the screw 2.1. The main weight of the entire paver side baffle lifting device is symmetrically distributed with the screw 2.1 as the axis of symmetry, and is finally transmitted to the paver by the main boom 1.1. Therefore, the paver side baffle lifting device provided in this embodiment can achieve stable force under any operating state and is unlikely to experience stress concentration and adverse torque.

[0022] In this embodiment, motor 2.4 is also set as stepper motor 2.4.1. Stepper motor 2.4.1 can perform pulse action with corresponding step distance according to pulse signal, which is beneficial to system control. Therefore, a control box 2.7 connected to the stepper motor 2.4.1 is also provided. Buttons for operation by personnel can be set on the control box 2.7. The control box 2.7 is also set on the upper part of the main arm 1.1 to facilitate operation and maintenance and reduce the load on the fixed frame 1.2.

[0023] This embodiment only demonstrates a paver sidewall lifting device scheme with a single main boom 1.1, a single set of screw lifting devices 2, a single fixed frame 1.2, and two lifting frames 1.3 distributed on both sides. Those skilled in the art can expand upon this embodiment to include more embodiments, including: a series scheme based on this embodiment, which can control the lifting of multiple slabs 3.1, or a scheme with more than two lifting frames 1.3, multiple sets of screw lifting devices 2, a longer single main boom 1.1, and a longer single fixed frame 1.2; a combination of multiple screws 2.1 and multiple sets of dovetail sliders 3.2.1 and dovetail grooves 1.4.1 to lift a heavier slab 3.1; a scheme with a single main boom 1.1 and multiple fixed frames 1.2 distributed at intervals; or a scheme with more than a longer single main boom 1.1, a longer single fixed frame 1.2, two lifting frames 1.3, and a single set of screw lifting devices 2 to lift a wider but not heavy slab 3.1. Furthermore, the above schemes can be further developed to include schemes within the scope of protection of this invention.

[0024] The paver side baffle lifting device provided in this embodiment uses a motor 2.4 to drive a screw lifting device 2 to make the lifting baffle 3 slide relative to the lifting frame 1.3 along the lifting direction. It has high control sensitivity and flexible response. The long slider 3.2 has a large contact area for sliding connection with the slide groove 1.4, which not only prevents the plate 3.1 from falling out, but also reduces abnormal noise and friction. The support frame 1 supports the lifting baffle 3 through at least two lifting frames 1.3 and screw lifting device 2. The connection point of the screw 2.1 and the fixed frame 1.2 is located in the middle of the two support points of the fixed frame 1.2. The structure of the support frame 1 and the lifting baffle 3 has high reliability. Example 2

[0025] This embodiment provides a paver that uses the paver side guard lifting device provided in Embodiment 1. The motor 2.4 is electrically connected to the paver control panel. This connection can be either a direct electrical signal connection between the stepper motor 2.4.1 and the paver control panel, or an indirect electrical signal connection via the control box 2.7. The paver control panel includes cab buttons, a vehicle system, an onboard computer, and a vehicle command remote control.

[0026] This embodiment provides a paver that integrates the control of the lifting baffle 3 into the paver's control system.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A paver side guard lifting device, characterized in that, include: The support frame (1) connected to the paver includes a main boom (1.1) and a lifting frame (1.3), with at least two lifting frames (1.3) connected to the main boom (1.1), and also includes a fixing frame (1.2), with at least two support points of the fixing frame (1.2) fixed to the adjacent lifting frame (1.3). The screw lifting device (2) installed on the support frame (1) includes a first bearing (2.3) installed on the main arm (1.1) and a second bearing (2.6) installed between two adjacent support points on the fixed frame (1.2). It also includes a screw (2.1) and a motor (2.4) that is driven by the screw (2.1). The two support ends of the screw (2.1) are connected to the support frame (1) through the first bearing (2.3) and the second bearing (2.6) respectively. The motor (2.4) is fixedly connected to the support frame (1). The lifting sleeve (2.2) is fitted into the screw (2.1). The lifting baffle (3) slidably connected to the lifting frame (1.3) includes a plate body (3.1), and the side of the plate body (3.1) facing the support frame (1) is provided with a thread sleeve seat (3.4) fixedly connected to the lifting thread sleeve (2.2). The lifting frame (1.3) has a sliding groove (1.4) along the lifting direction, and the plate (3.1) has a long slider (3.2) on the side facing the support frame (1) that slides and engages with the sliding groove (1.4); or, the lifting frame (1.3) has a long slider (3.2) along the lifting direction, and the plate (3.1) has a sliding groove (1.4) on the side facing the support frame (1) that slides and engages with the long slider (3.2). The slide (1.4) includes a dovetail groove (1.4.1), and the elongated slider (3.2) includes a dovetail slider (3.2.1) that matches the shape of the dovetail groove (1.4.1). The plate (3.1) is provided with a dumbbell-shaped reinforcing plate (3.3), and the area of ​​the reinforcing plate (3.3) near the lifting frame (1.3) is increased; The lead screw lifting device (2) further includes a bearing seat (2.8), the bearing seat (2.8) includes a first mounting surface (2.8.1) connected to the main arm (1.1) or the fixed frame (1.2), and the first bearing (2.3) or the second bearing (2.6) is mounted on the first mounting surface (2.8.1). It also includes a second mounting surface (2.8.2) for mounting the motor (2.4), the drive shaft of the motor (2.4) passes through the second mounting surface (2.8.2), the end of the drive shaft is fixedly connected to a coupling (2.5), and the lead screw (2.1) passes through the first bearing (2.3) or the second bearing (2.6) and is connected to the coupling (2.5) for transmission. The motor (2.4) includes a stepper motor (2.4.1), and the lead screw lifting device (2) includes a control box (2.7) that is electrically connected to the stepper motor (2.4.1). The first mounting surface (2.8.1) is connected to the main arm (1.1), the first bearing (2.3) is mounted on the first mounting surface (2.8.1), and the lead screw (2.1) passes through the first bearing (2.3) and is connected to the coupling (2.5) for transmission. The control box (2.7) is located on the main arm (1.1). The fixed frame (1.2) is parallel to the main boom (1.1), the lifting frame (1.3) is perpendicular to the fixed frame (1.2) and the main boom (1.1), the second bearing (2.6) is installed at the midpoint of two adjacent support points of the fixed frame (1.2), and the lifting frame (1.3) is symmetrically distributed about the lead screw (2.1). The threaded sleeve seat (3.4) is located on the center line of gravity of the lifting baffle (3).

2. The paver side guard lifting device according to claim 1, characterized in that, The lifting frame (1.3) is connected to the dovetail groove (1.4.1) by multiple first bolts (1.4.2), and the plate (3.1) is connected to the dovetail groove (1.4.1) by multiple second bolts ( 3.1.1) is connected to the dovetail slider (3.2.1).

3. The paver side guard lifting device according to claim 1, characterized in that, The lifting threaded sleeve (2.2) and the threaded sleeve seat (3.4) are connected by a plurality of third bolts (3.4.1).

4. A paver, characterized in that, The device includes the paver side guard lifting device according to any one of claims 1 to 3, wherein the motor (2.4) is electrically connected to the paver control panel.

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