A step difference adjustment device and a screed board

Abstract

The present invention discloses a step difference adjusting device and a screed board, which comprise a frame body, a power component, a driving wheel, a driven wheel, a mounting seat, a screw rod, a threaded block, a sliding block and a side plate. The power component is connected to the frame body; the driving wheel is connected to the power component and driven by the power component to rotate; the driven wheel is connected to the driving wheel through a chain and driven by the driving wheel to rotate; the mounting seat is connected to the frame body; the screw rod is connected to the mounting seat through a bearing and is connected to the driven wheel, and is driven by the driven wheel to rotate in the mounting seat; the threaded block is in threaded cooperation with the screw rod; the sliding block is connected to the threaded block and is slidably arranged in a chute on the frame body close to the side plate; the extending direction of the side plate is the same as that of the screw rod and is connected to the sliding block. The structure of the present invention is simple, firm and reliable. The driving by a power component (such as a hydraulic motor) replaces manual adjustment, eliminating the tediousness of manual adjustment, reducing the labor intensity and improving the rapidity of adjustment.

Description

Technical Field

[0001] The present invention specifically relates to a step difference adjusting device and a screed board. Background Art

[0002] The step difference adjusting device is an essential component of the telescopic screed board. Currently, it mainly includes the screw group mechanism as shown in Figure 1 and the four-link mechanism as shown in Figure 2 The adjustment methods of both are manual adjustments. Figure 1 When adjusting the screw group mechanism in , the fastening bolts need to be loosened, and the chain needs to be disassembled to adjust the pre-elevation angle. The operation is relatively cumbersome, and the overall rigidity of this structure is poor, and the stability is insufficient, weakening the anti-torsion ability of the telescopic section; Figure 2 The overall structure of the four-link mechanism in has good rigidity and stability. The height difference and elevation angle are adjusted by manually operating the screw and nut, and the operation is relatively convenient. However, it is difficult to achieve electro-hydraulic drive, and it is impossible to further reduce the labor intensity, affecting the timeliness of adjustment. Summary of the Invention

[0003] In view of the above problems, the present invention provides a step difference adjusting device and a screed board, which have a simple structure, are firm and reliable, are driven by a power component (such as a hydraulic motor) instead of manual adjustment, eliminating the cumbersome manual adjustment, reducing the labor intensity, and improving the rapidity of adjustment.

[0004] In order to achieve the above technical objectives and reach the above technical effects, the present invention is realized through the following technical solutions:

[0005] In a first aspect, the present invention provides a step difference adjusting device, including:

[0006] A frame;

[0007] A power component, connected to the frame;

[0008] A driving wheel, connected to the power component and driven by the power component to rotate self - sufficiently;

[0009] A driven wheel, connected to the driving wheel through a chain and driven by the driving wheel to rotate self - sufficiently;

[0010] A mounting seat, connected to the frame;

[0011] A screw, connected to the mounting seat through a bearing and connected to the driven wheel, and driven by the driven wheel to rotate self - sufficiently within the mounting seat;

[0012] A threaded block, in threaded cooperation with the screw;

[0013] A slider, connected to the threaded block and sliding within a chute on the frame close to the side plate;

[0014] The side plate extends in the same direction as the screw and is connected to the slider.

[0015] Optionally, the driven sprocket is fixed on the screw with a flat key and a retaining ring.

[0016] Optionally, a U-shaped groove is provided on the slider, and the threaded block is located in the U-shaped groove.

[0017] Optionally, the step difference adjusting device further includes a pin shaft and a first pressing plate. The pin shaft passes through the slider and the side plate at the same time. The first pressing plate is installed on the pin shaft with screws to limit the axial movement of the pin shaft.

[0018] Optionally, the step difference adjusting device further includes an eccentric shaft, a second pressing plate and a disc spring group. The eccentric shaft is in threaded fit with the side plate, and the eccentric part of the eccentric shaft penetrates into the long circular hole on the slider. The second pressing plate is pressed on the eccentric shaft with a nut to limit the rotation of the eccentric shaft. The disc spring group is installed through the first bolt to press the side plate and the frame together.

[0019] Optionally, the number of the disc spring groups is 2, and the two disc spring groups are arranged oppositely.

[0020] Optionally, the step difference adjusting device further includes a drag chain plate, which is connected to the frame and supports the chain.

[0021] Optionally, the step difference adjusting device further includes a second bolt, which is installed on the frame and abuts against the mounting seat. When the second bolt is screwed in, the position of the mounting seat is adjusted to achieve chain tensioning.

[0022] Optionally, the chute on the frame is oblong.

[0023] In a second aspect, the present invention provides a screed board, including the step difference adjusting device according to any one of the first aspect.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] The present invention provides a step difference adjusting device and a screed board, which have a simple structure, are firm and reliable, are driven by a power component instead of manual adjustment, eliminating the cumbersome manual adjustment, reducing the labor intensity, improving the rapidity of adjustment, and being able to conveniently adjust the step difference of the elevation angle, reducing the labor intensity and quickly adjusting the step difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the content of the present invention be more clearly understood, the following further describes the present invention in detail according to specific embodiments in conjunction with the drawings, where:

[0027] Figure 1 is a schematic diagram of a step difference adjusting mechanism of a screw rod group in the prior art;

[0028] Figure 2 is a schematic diagram of a four-link step adjustment mechanism in the prior art;

[0029] Figure 3 is the front view of the present invention;

[0030] Figure 4 is the right side sectional view of the present invention;

[0031] Figure 5 is the left view of the present invention;

[0032] Among them:

[0033] 1. Power component; 2. Driving wheel; 3. Mounting seat; 4. Screw; 5. Driven wheel; 6. Threaded block; 7. Slide block; 8. Pin shaft; 9. First pressing plate; 10. Eccentric shaft; 11. Second pressing plate; 12. Nut; 13. Disc spring group; 14. Chain; 15. Chain support plate; 16. Second bolt, 17. Side plate, 18. Frame body. Specific embodiments

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the protection scope of the present invention.

[0035] The application principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Embodiment 1

[0037] A step adjustment device is provided in an embodiment of the present invention, including:

[0038] Frame body 18; In actual use, the frame body can be a frame body with a fixed structure or a telescopic frame, and the specific selection depends on the actual situation;

[0039] Power component 1, connected to the frame body 18; In actual use, the power component 1 can be selected as a motor and fixed on the frame body through a bracket;

[0040] Driving wheel 2, connected to the power component 1 and driven by the power component 1 to rotate self;

[0041] Driven wheel 5, connected to the driving wheel 2 through a chain 14 and driven by the driving wheel 2 to rotate self;

[0042] Mounting seat 3, connected to the frame body;

[0043] The screw rod 4 is connected to the mounting seat 3 through bearings and is also connected to the driven wheel 5. It rotates self - driven by the driven wheel 5 within the mounting seat 3, that is, it only makes rotational motion.

[0044] The threaded block 6 is in threaded cooperation with the screw rod 4.

[0045] The slider 7 is connected to the threaded block 6 and slides in the chute on the frame body close to the side plate 17. In the actual use process, the chute on the frame body is preferably oblong.

[0046] The side plate 17 has the same extending direction as the screw rod 4 and is connected to the slider 7.

[0047] In a specific embodiment of this embodiment, the driven sprocket is fixed on the screw rod 4 with a flat key and a retaining ring.

[0048] In a specific embodiment of this embodiment, as Figure 4 shown, the slider 7 is provided with a U - shaped groove, and the threaded block 6 is located within the U - shaped groove.

[0049] In a specific embodiment of this embodiment, the step difference adjusting device further includes a pin shaft 8 and a first pressing plate 9. The pin shaft 8 passes through the slider 7 and the side plate 17 simultaneously. The first pressing plate 9 is installed on the pin shaft 8 with screws to limit the axial movement of the pin shaft 8.

[0050] In a specific embodiment of this embodiment, the step difference adjusting device further includes an eccentric shaft 10, a second pressing plate 11, and a disc spring group 13. The eccentric shaft 10 is in threaded cooperation with the side plate 17, and the eccentric part of the eccentric shaft 10 penetrates into the oblong hole on the slider 7. The second pressing plate 11 is pressed on the eccentric shaft 10 with a nut 12 to limit the rotation of the eccentric shaft 10. The disc spring group 13 is installed through the first bolt to press the side plate 17 and the frame body together.

[0051] In a specific embodiment of this embodiment, the number of the disc spring groups 13 is 2, and the two disc spring groups 13 are arranged oppositely.

[0052] In a specific embodiment of this embodiment, the step difference adjusting device further includes a chain support plate 15. The chain support plate 15 is connected to the frame body and supports the chain 14.

[0053] In a specific embodiment of this embodiment, the step difference adjusting device further includes a second bolt 16. The second bolt 16 is installed on the frame body and abuts against the mounting seat 3. When the second bolt 16 is screwed in, the position of the mounting seat 3 is adjusted to achieve tensioning of the chain 14.

[0054] In the actual application process, the number of the driven wheels 5, the mounting seats 3, the screws 4, the threaded blocks 6, the sliders 7 and the side plates 17 is 2, and they are oppositely arranged at both ends of the frame; the working principle of the step difference adjusting device in this embodiment is as follows:

[0055] When the step difference needs to be adjusted, the power component 1 provides power to drive the driving wheel 2 to rotate, so that the chain 14 drives the screws 4 on both sides to rotate; the position of the threaded block 6 on the screw 4 changes, that is, the position of the frame 18 relative to the side plate 17 changes. The power component 1 rotates forward or reversely to drive the frame to rise or fall, realizing the adjustment of the step difference. When the elevation angle of the frame needs to be adjusted, loosen the nut 12, turn the eccentric shaft 10 with a wrench, change the angle between the frame and the side plate, realize the adjustment of the elevation angle of the frame, and tighten the nut 12 to complete the adjustment.

[0056] Embodiment 2

[0057] In the embodiment of the present invention, a screed is provided, which includes the step difference adjusting device described in any one of Embodiment 1.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A step difference adjusting device, characterized in that, Comprising: Frame body; Power component, connected to the frame body; Drive wheel, connected to the power component, driven by the power component to rotate self - rotatably; Driven wheel, connected to the drive wheel through a chain, driven by the drive wheel to rotate self - rotatably; Mounting seat, connected to the frame body; Screw rod, connected to the mounting seat through a bearing, and connected to the driven wheel, driven by the driven wheel to rotate self - rotatably within the mounting seat; Threaded block, in threaded cooperation with the screw rod; Slider, connected to the threaded block, and slidably disposed within a chute on the frame body close to the side plate; Side plate, whose extending direction is the same as that of the screw rod, and connected to the slider; The level difference adjusting device further includes an eccentric shaft, a second pressing plate and a disc spring group. The eccentric shaft is in threaded cooperation with the side plate, and the eccentric part of the eccentric shaft penetrates into an oblong hole on the slider; the second pressing plate is pressed on the eccentric shaft with a nut to limit the rotation of the eccentric shaft; the disc spring group is installed through a first bolt to press the side plate and the frame body together; When it is necessary to adjust the level difference, the power component provides power to drive the drive wheel to rotate, so that the chain drives the screw rods on both sides to rotate; the position of the threaded block on the screw rod changes, that is, the position of the frame body relative to the side plate changes. The power component rotates forward or backward to drive the frame body to rise or fall, realizing the adjustment of the level difference; When it is necessary to adjust the elevation angle of the frame body, loosen the nut, rotate the eccentric shaft, change the angle between the frame body and the side plate, realize the adjustment of the elevation angle of the frame body, and tighten the nut to complete the adjustment.

2. The step difference adjusting device according to claim 1, characterized in that: The driven wheel is fixed on the screw rod with a flat key and a retaining ring.

3. The step difference adjusting device according to claim 1, wherein: The slider is provided with a U - shaped groove, and the threaded block is located within the U - shaped groove.

4. The step difference adjusting device according to claim 1, characterized in that: The level difference adjusting device further includes a pin shaft and a first pressing plate. The pin shaft passes through the slider and the side plate at the same time; the first pressing plate is installed on the pin shaft with a screw to limit the axial movement of the pin shaft.

5. The step difference adjusting device according to claim 1, characterized in that: The number of the disc spring groups is 2, and the two disc spring groups are arranged oppositely.

6. The step difference adjusting device according to claim 1, characterized in that: The level difference adjusting device further includes a chain carrier plate, which is connected to the frame body and holds the chain.

7. The step difference adjusting device according to claim 1, wherein: The level difference adjusting device further includes a second bolt, which is installed on the frame body and abuts against the mounting seat. When the second bolt is screwed in, the position of the mounting seat is adjusted to realize the tensioning of the chain.

8. A step difference adjusting device according to claim 1, characterized in that: The chute on the frame body is oblong.

9. A screed board, characterized in that: Comprising the level difference adjusting device according to any one of claims 1 - 8.

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