Adjustable bottom plate, drive unit and scraper conveyor

Abstract

This utility model discloses an adjustable base plate, comprising an integrally formed first body and a second body. The first body includes multiple fixed seats arranged symmetrically in two rows and two columns. The two rows of fixed seats are symmetrically distributed around the working center line of the drive frame groove of the drive unit, and the two columns of fixed seats are symmetrically distributed around the center line of the working section. The second body extends to one side along the width direction of the first body. This utility model also discloses a drive unit and a scraper conveyor. The beneficial effects of this utility model are: it meets the overall structural dimensional accuracy and performance requirements, eliminates the need for large-scale machining equipment, and significantly reduces the difficulty and cost of manufacturing; moreover, the symmetrical distribution of the fixed seats makes positioning simple, accurate, stable, and reliable.

Description

Technical Field

[0001] This utility model relates to the field of coal mine transportation technology, and in particular to an adjustable bottom plate, a drive unit, and a scraper conveyor. Background Technology

[0002] A scraper conveyor is a continuously operating transport machine that uses a flexible body as its traction mechanism. Scraper conveyors are primarily used in longwall coal mining faces and are currently the only transport equipment in longwall coal mining faces. They can also be used in mining roadways, connecting eyes, mining inclines, and tunneling faces, mainly undertaking the task of coal transportation. In addition to transporting coal and materials, scraper conveyors also serve as the running track for coal mining machines, making them an indispensable main piece of equipment in modern coal mining technology. As long as the scraper conveyor continues to operate continuously, production can proceed normally. Otherwise, the entire coal mining face will be shut down, causing a complete production interruption.

[0003] Currently, domestic scraper conveyors mainly consist of a drive unit (head), trough, and tail. The drive unit is the core power source for the entire scraper conveyor. Traditionally, the drive unit is placed at one end or both ends of the scraper conveyor; alternatively, intermediate drive scraper conveyors have been introduced, placing the drive unit in the middle of the scraper conveyor, thus expanding the variety of scraper conveyor products.

[0004] To adapt to the different working conditions of various mine faces, the installation and installation requirements vary. For example, the motor reducer of the scraper head needs to be positioned on the side furthest from the coal face during on-site installation, according to the mining and transportation directions of the coal face. This reduces the gap between the scraper conveyor and the coal face, allowing the scraper conveyor body to receive coal and rock that collapses from the coal face as early as possible during mining operations. The power unit (motor, coupler, reducer, etc.) of the scraper conveyor drive unit needs to have a structure that allows for symmetrical interchangeable installation on the left and right sides (e.g., when standing at the head facing the tail, with the coal face on the left side of the scraper conveyor, the motor reducer is installed on the right side; if standing at the head facing the tail, with the coal face on the right side of the scraper conveyor, the motor reducer is installed on the left side).

[0005] Because the weight of the power unit (motor, coupler, reducer, etc.) is relatively large compared to the main structure of the machine head, the overall center of gravity of the drive unit is easily unbalanced during installation, which may cause it to tip over and endanger personal safety. Therefore, it is usually necessary to design and configure a push beam (pad) or other auxiliary anti-tipping components at the bottom of the drive unit (machine head) so that its outline exceeds the overall center of gravity range after installation, in order to ensure that the overall center of gravity of the entire drive unit is stable and safe during operation and movement, and to form reliable support.

[0006] The overall structure of the drive unit is relatively complex. When the scraper conveyor needs to be adjusted to change the orientation of the working face, the power unit needs to be moved to the opposite side of the machine body, and related auxiliary components such as the push beam (pad frame) also need to be disassembled and repositioned accordingly. To ensure the stability of the overall structure of the drive unit, these auxiliary components need to meet high manufacturing precision requirements, and on-site assembly is relatively complex. For large and heavy scraper conveyors, due to the need to consider the maximum safe lifting weight of individual components and the size limitations of the shaft during manufacturing and transportation, the overall structure of the drive frame often needs to be designed as a segmented combination structure of the drive frame (head frame) plus transition grooves, making its manufacturing and on-site installation even more complex and difficult.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0008] The technical problem to be solved by this utility model is: how to solve the difficulties in manufacturing and installing the current anti-tipping methods.

[0009] This utility model solves the above-mentioned technical problems through the following technical means:

[0010] The adjustable base plate includes an integrally formed first body and a second body. The first body includes multiple fixed seats, which are arranged symmetrically in two rows and two columns. The two rows of fixed seats are symmetrically distributed with respect to the working center line of the drive frame groove of the drive unit, and the two columns of fixed seats are symmetrically distributed with respect to the working section center line. The second body extends to one side along the width direction of the first body.

[0011] This utility model adopts an integrated adjustable base plate, replacing the traditional fixed base plate and pad structure, which simplifies the structure and facilitates the manufacturing and assembly of drive frame components. The detachable base plate is a single-layer steel plate structure, which can be easily pressed into shape after CNC flame cutting. The fixed seat and upper hanging seat and other accessories are prefabricated products and welded on site. The relatively simple production and manufacturing process ensures that the overall structural dimensional accuracy and performance are met after the drive frame body and the adjustable base plate are assembled. It does not require large-scale machining equipment, and the difficulty and cost of production and manufacturing are significantly reduced. Moreover, the fixed seats are symmetrically distributed, which can ensure accurate installation. The fixed seats can be detachably connected to the upper hanging seat of the drive frame body, and the positioning is simple, accurate, stable and reliable.

[0012] Preferably, the first body is a rectangular plate structure, and the second body is a trapezoidal structure with folded edges forming upward and inward on the two inclined sides of the second body.

[0013] Preferably, the angle of the folded edge is 30-50°.

[0014] Folding the edges can improve the equipment's adaptability to the tunnel floor during horizontal movement.

[0015] Preferably, the side of the fixing seat is provided with an anti-rotation T-slot, and the upper dimension of the anti-rotation T-slot is smaller than the lower dimension.

[0016] In this invention, the lower width of the anti-rotation T-slot is matched with the parallel surface dimension of the hexagonal head of the fixing bolt (single-sided gap ≤ 0.75), so that the hexagonal head of the bolt, which is fastened in the slot after assembly, is restricted from rotating when tightening the nut. This eliminates the need to use additional tools such as wrenches to hold the bolt head in place to prevent it from rotating when tightening the nut. It can be easily operated with one hand, thus greatly facilitating on-site assembly operations.

[0017] Preferably, the fixing seats located at both ends of the first body along its length further include limiting bosses, which are located on the opposite side of the anti-rotation T-slot.

[0018] Of the six fixing seats in this utility model, the two in the middle are ordinary fixing seats, used to strengthen the connection strength between the adjustable base plate and the drive frame body; the two at both ends are limiting fixing seats, which serve to fix the lateral spacing of the lower edge of the side plate of the drive frame body and at the same time constrain the longitudinal position of the base plate of the drive frame body.

[0019] The limiting fixing seat has an additional limiting boss on the inner side compared to the ordinary fixing seat. Two limiting notches are set on each side of the lower edge of the side plate of the drive frame body. During assembly, the head width of the limiting boss matches the limiting notch of the side plate, which can accurately constrain the longitudinal assembly position of the base plate in the drive frame. The shoulder plane of the limiting boss is flush with the outer side of the side plate, which can limit the working distance of the lower edge of the side plate in the width direction of the drive frame body, thereby ensuring that the adjustable base plate is accurate in size and position and has a solid and reliable structure after assembly.

[0020] This utility model also discloses a drive unit, including a drive frame body and an adjustable base plate. The drive frame body has multiple upper brackets on both sides. The fixed base of the adjustable base plate is inserted into the bottom of the upper bracket. The upper bracket and the fixed base are detachably connected.

[0021] Preferably, the upper mounting bases located at both ends of the first body length direction also include limiting notches below them, and the fixing bases located at both ends of the first body length direction also include limiting bosses, which are engaged in the limiting notches.

[0022] Preferably, the side of the fixed seat has an anti-rotation T-slot, the upper bracket and the fixed seat are connected by bolts, the head of the bolt is stuck in the lower part of the anti-rotation T-slot, the shank of the bolt is located in the upper part of the anti-rotation T-slot, and the top of the bolt passes through the upper bracket and is connected to a washer and a nut.

[0023] Preferably, the upper bracket is a U-shaped frame structure, with holes for bolts to pass through at the bottom of the U-shaped frame.

[0024] This utility model also discloses a scraper conveyor, including a drive unit and a power unit. The power unit is connected to the side of the drive frame body, and a second body adjustable to the bottom plate is located below the power unit.

[0025] This invention breaks with conventional scraper conveyor product design thinking. By adopting a single-layer, detachable, adjustable base plate, it replaces the traditional scraper conveyor's drive unit, which requires a separately manufactured anti-tipping beam or pushing part (pad) installed under the fixed base plate of the drive frame body. This adjustable base plate, installed in the unbalanced support area on the same side as the power unit (motor, reducer, etc.), perfectly enables the scraper conveyor's power unit (motor, reducer) to be installed interchangeably on the left and right sides. During on-site assembly, the drive frame body is simply lifted and aligned with the limiting fixing seat and limiting groove on the adjustable base plate. The limiting fixing seat is connected to the ordinary fixing seat and the upper hanging seat by bolts. When installing the bolts, only one hand is needed to place the bolt into the anti-rotation T-slot of the fixing seat, add the washer and nut, and tighten. The entire process can be easily completed by one person without the need for other personnel or tools. Compared to the traditional structure where multiple people are required to operate the drive unit, this significantly reduces the on-site operation difficulty and labor intensity, greatly improving work efficiency.

[0026] The advantages of this utility model are:

[0027] This utility model adopts an integrated adjustable base plate, replacing the traditional fixed base plate and pad structure, which simplifies the structure and facilitates the manufacturing and assembly of drive frame components. The detachable base plate is a single-layer steel plate structure, which can be easily pressed into shape after CNC flame cutting. The fixed seat and upper hanging seat and other accessories are prefabricated products and welded on site. The relatively simple production and manufacturing process ensures that the overall structural dimensional accuracy and performance are met after the drive frame body and the adjustable base plate are assembled. It does not require large-scale machining equipment, and the difficulty and cost of production and manufacturing are significantly reduced. Moreover, the fixed seats are symmetrically distributed, which can ensure accurate installation. The fixed seats can be detachably connected to the upper hanging seat of the drive frame body, and the positioning is simple, accurate, stable and reliable.

[0028] Folding the edges can improve the equipment's adaptability to the tunnel floor during horizontal movement.

[0029] In this invention, the lower width of the anti-rotation T-slot is matched with the parallel surface dimension of the hexagonal head of the fixing bolt (single-sided gap ≤ 0.75), so that the hexagonal head of the bolt, which is fastened in the slot after assembly, is restricted from rotating when tightening the nut. This eliminates the need to use additional tools such as wrenches to hold the bolt head in place to prevent it from rotating when tightening the nut. It can be easily operated with one hand, thus greatly facilitating on-site assembly operations.

[0030] The limiting fixing seat has an additional limiting boss on the inner side compared to the ordinary fixing seat. Two limiting notches are set on each side of the lower edge of the side plate of the drive frame body. During assembly, the head width of the limiting boss matches the limiting notch of the side plate, which can accurately constrain the longitudinal assembly position of the base plate in the drive frame. The shoulder plane of the limiting boss is flush with the outer side of the side plate, which can limit the working distance of the lower edge of the side plate in the width direction of the drive frame body, thereby ensuring that the adjustable base plate is accurate in size and position and has a solid and reliable structure after assembly.

[0031] This invention breaks with conventional scraper conveyor product design thinking. By adopting a single-layer, detachable, adjustable base plate, it replaces the traditional scraper conveyor's drive unit, which requires a separately manufactured anti-tipping beam or pushing part (pad) installed under the fixed base plate of the drive frame body. This adjustable base plate, installed in the unbalanced support area on the same side as the power unit (motor reducer, etc.), perfectly enables the scraper conveyor's power unit (motor reducer) to be installed on either side. During on-site assembly, the drive frame body is simply lifted and aligned with the limiting fixing seat and limiting groove on the adjustable base plate. The limiting fixing seat is connected to the ordinary fixing seat and the upper hanging seat via bolts. When installing the bolts, only one hand is needed to place the bolt into the anti-rotation T-slot of the fixing seat, add the washer and nut, and tighten. The entire process can be easily completed by one person without the need for other personnel or tools. Compared to the traditional structure where multiple people are required to operate the drive unit during assembly, this significantly reduces the on-site operation difficulty and labor intensity, greatly improving work efficiency. Attached Figure Description

[0032] Figure 1-1 This is a schematic diagram of the structure of a traditional scraper conveyor (with the drive unit at one end) in the background art;

[0033] Figure 1-2 This is a schematic diagram of the structure of an intermediate scraper conveyor (with the drive unit in the middle) in the background art;

[0034] Figure 1-3 This is a schematic diagram of the right-side installation of the motor reducer in an underground coal mining face in the background art;

[0035] Figure 1-4 This is a schematic diagram of the left-side installation of the motor reducer in an underground coal mining face in the background art;

[0036] Figure 2 This is a top view of the adjustable base plate according to an embodiment of the present invention;

[0037] Figure 3 This is a front view of the adjustable base plate according to an embodiment of the present invention;

[0038] Figure 4 This is a side view of the adjustable base plate according to an embodiment of the present invention;

[0039] Figure 5 yes Figure 2 Cross-sectional view at point BB;

[0040] Figure 6 This is a front view of a common fixing base according to an embodiment of this utility model;

[0041] Figure 7 This is a top view of a common fixing base according to an embodiment of this utility model;

[0042] Figure 8 yes Figure 6 Sectional view at CC;

[0043] Figure 9 This is a schematic diagram of the connection between the limiting fixing seat and the upper hanging seat in an embodiment of this utility model;

[0044] Figure 10 yes Figure 9 K-direction diagram;

[0045] Figure 11 yes Figure 9 Sectional view at DD;

[0046] Figure 12 This is a schematic diagram of the assembly of the drive frame body and the adjustable base plate according to an embodiment of the present invention;

[0047] Figure 13 This is a schematic diagram of the assembly of the drive frame body and the adjustable base plate according to an embodiment of the present invention;

[0048] Figure 14 This is a schematic diagram of the assembly of the drive frame body and the adjustable base plate according to an embodiment of the present invention;

[0049] Figure 15 yes Figure 12 Enlarged view at point E in the middle;

[0050] Figure 16 This is a top view of the embodiment of the present invention after the base plate is rotated 180° and assembled with the drive frame body;

[0051] Numbering on the map:

[0052] 1. Adjustable base plate; 11. First body; 12. Second body; 13. Ordinary fixing seat; 14. Limiting fixing seat; 141. Limiting boss; 15. Folded edge; 16. Anti-rotation T-slot;

[0053] 2. Drive frame body; 21. Upper mount; 22. Limiting notch; 3. Fixing bolts; 4. Power unit. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0055] Example 1:

[0056] like Figure 2 , Figure 3 , Figure 4 As shown, the adjustable base plate 1 includes an integrally formed first body 11 and a second body 12. The first body 11 is located in the transportation working area, and the second body 12 is located in the weight-bearing support area. The first body 11 includes multiple fixed seats, which are arranged symmetrically in two rows and two columns. The two rows of fixed seats are symmetrically distributed with respect to the working center line (horizontal direction) of the drive frame groove of the drive unit, and the two columns of fixed seats are symmetrically distributed with respect to the working section center line (vertical direction). The second body 12 extends to one side along the width direction of the first body 11.

[0057] Specifically, in this embodiment, the six fixing seats include a general fixing seat 13 and a limiting fixing seat 14. For example... Figure 2 As shown, the two in the middle are ordinary fixing seats 13, which are used to strengthen the connection strength between the adjustable base plate 1 and the drive frame body 2; the two at both ends are limiting fixing seats 14, which serve to fix the lateral spacing of the lower edge of the side plate of the drive frame body 2 and at the same time constrain the longitudinal position of the base plate of the drive frame body.

[0058] Both the ordinary fixing seat 13 and the limiting fixing seat 14 include an anti-rotation T-slot 16, such as Figure 6 , Figure 7 , Figure 8 As shown, the upper dimension of the anti-rotation T-slot 16 is smaller than the lower dimension. Specifically, as... Figure 7 As shown, the anti-rotation T-slot 16 has an opening on one side for inserting bolts, and the blind end of the anti-rotation T-slot 16 is semi-circular. Figure 9 , Figure 10 , Figure 11 As shown, the lower width of the anti-rotation T-slot 16 is matched with the parallel surface dimension of the hexagonal head of the fixing bolt 3 with a gap design (single-sided gap ≤ 0.75). This design ensures that the hexagonal head of the bolt, which is fastened in the anti-rotation T-slot 16 after assembly, is restricted from rotating when the nut is tightened. This eliminates the need to use additional tools such as wrenches to hold the bolt head in place to prevent it from rotating during the usual nut tightening operation. It can be easily operated with one hand, thus greatly facilitating on-site assembly work.

[0059] In this embodiment, the difference between the ordinary fixing seat 13 and the limiting fixing seat 14 is that, Figure 10 As shown, the inner side of the limiting fixing seat 14 includes a limiting boss 141. Two limiting notches are provided on each side of the lower edge of the side plate of the drive frame body 2. During assembly, the head width of the limiting boss matches the limiting notch of the side plate of the drive frame body 2, which can accurately constrain the longitudinal assembly position of the base plate in the drive frame. The shoulder plane of the limiting boss is flush with the outer side of the side plate, which can limit the working distance of the lower edge of the side plate in the width direction of the drive frame body, thereby ensuring that the adjustable base plate is accurate in size and position and has a solid and reliable structure after assembly.

[0060] like Figure 2 As shown, the first body 11 is a rectangular plate structure, and the second body 12 is a trapezoidal structure, with folded edges 15 formed upward and inward on the two inclined sides of the second body 12. The angle of the folded edges 15 is 30-50°. The folded edges 15 can improve the adaptability of the equipment to the shaft floor during horizontal movement.

[0061] This embodiment uses an integrated adjustable base plate 1 instead of the traditional fixed base plate and pad structure, which simplifies the structure and facilitates the manufacturing and assembly of the drive frame components. The detachable base plate 1 is a single-layer steel plate structure, which can be easily pressed into shape after CNC flame cutting. The fixed seat and upper hanging seat 21 and other accessories are prefabricated products and welded on site. The relatively simple production and manufacturing process ensures that the overall structural dimensional accuracy and performance are met after the drive frame body and the adjustable base plate are assembled. It does not require large-scale machining equipment, and the difficulty and cost of production and manufacturing are significantly reduced. Moreover, the fixed seats are symmetrically distributed, which can ensure accurate installation. The fixed seats can be detachably connected to the upper hanging seat of the drive frame body, and the positioning is simple, accurate, stable and reliable.

[0062] Example 2

[0063] like Figure 12 , Figure 13 , Figure 14 , Figure 15 As shown, this embodiment discloses a drive unit, including a drive frame body 2 and an adjustable base plate 1. The drive frame body 2 has multiple upper brackets 21 on both sides. The fixed seat of the adjustable base plate 1 is inserted into the bottom of the upper bracket 21. The upper bracket 21 and the fixed seat are detachably connected by a bolt assembly.

[0064] like Figure 12 As shown, each side of the drive frame body 2 includes three upper mounting brackets 21, and the position and number of the upper mounting brackets 21 correspond one-to-one with the fixed brackets. The drive frame body 2 includes side plates and a bottom plate, as shown... Figure 12 , Figure 15As shown, below the upper mounting brackets 21 located at both ends of the drive frame body 21 along its length, the side plate also includes limiting notches 22, as described in Embodiment 1. The limiting fixing seat 14 also includes limiting bosses 141, as shown in Embodiment 1. Figure 13 As shown, the limiting boss 141 can be inserted into the limiting notch 22.

[0065] Both the ordinary fixing seat 13 and the limiting fixing seat 14 have anti-rotation T-slots 16 on their sides. The upper hanging seat 21 is connected to the ordinary fixing seat 13 and the limiting fixing seat 14 by fixing bolts 3. The head of the fixing bolt 3 is stuck in the lower part of the anti-rotation T-slot 16, the rod of the fixing bolt 3 is located in the upper part of the anti-rotation T-slot 16, and the top of the fixing bolt 3 passes through the upper hanging seat 21 and is connected to a washer and a nut.

[0066] In this embodiment, the upper bracket 21 is a U-shaped frame structure, and the bottom of the U-shaped frame has holes for bolts to pass through.

[0067] This embodiment breaks with conventional scraper conveyor product design thinking. By adopting a single-layer detachable adjustable base plate, it replaces the traditional scraper conveyor's drive unit, which requires a separately manufactured and installed anti-backward pushing beam or pushing part (pad) under the fixed base plate of its drive frame body. By installing this adjustable base plate in the unbalanced support area, on the same side as the power unit 4 (motor reducer, etc.), the function of interchangeable left and right installation of the scraper conveyor's power unit (motor reducer) can be perfectly realized.

[0068] In this embodiment, during on-site assembly, the drive frame body 2 only needs to be lifted and aligned with the limiting fixing seat 14 on the adjustable base plate 1 and the limiting groove 22. Both the limiting fixing seat 14 and the ordinary fixing seat 13 are connected to the upper hanging seat 21 by fixing bolts 3. When installing the fixing bolts 3, only one hand is needed to place the fixing bolts 3 into the anti-rotation T-slot 16 of the fixing seat, then add the washer and nut and tighten. The entire process can be easily completed by one person without the assistance of other personnel or tools. Compared with the traditional structure drive unit assembly, which requires multiple people to cooperate with auxiliary tools, this significantly reduces the on-site operation difficulty and labor intensity of the assembly work, and greatly improves work efficiency.

[0069] This embodiment also discloses a scraper conveyor, including a drive unit and a power unit 4. The power unit 4 is connected to the side of the drive frame body 2, and the second body 12, which is adjustable to the bottom plate 1, is located below the power unit 4.

[0070] When the power unit 4 needs to be reversed, the power unit 4 is disassembled, the drive frame body 2 is hoisted up, and the adjustable base plate 1 is disassembled, such as... Figure 16As shown, after the adjustable base plate 1 is rotated 180°, it is reconnected to the drive frame body 1. Then, the power unit 4 is installed, which enables the power unit 4 to steer. Since the six fixed seats of the adjustable base plate 1 are symmetrically arranged, and the drive frame body 11 is also a symmetrical structure, it can still be aligned with the drive frame body 11 after rotating 180° and connected by fixing bolts 3.

[0071] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An adjustable base plate, characterized in that, The device includes a first body and a second body that are integrally formed. The first body includes multiple fixed seats, which are arranged symmetrically in two rows and two columns. The two rows of fixed seats are symmetrically distributed with respect to the working center line of the drive frame groove of the drive unit, and the two columns of fixed seats are symmetrically distributed with respect to the working section center line. The second body extends to one side along the width direction of the first body.

2. The adjustable base plate according to claim 1, characterized in that, The first body is a rectangular plate structure, and the second body is a trapezoidal structure with folded edges forming upward and inward on the two inclined sides of the second body.

3. The adjustable base plate according to claim 2, characterized in that, The angle of the folded edge is 30-50°.

4. The adjustable base plate according to claim 1, characterized in that, The side of the fixing seat is provided with an anti-rotation T-slot, and the upper dimension of the anti-rotation T-slot is smaller than the lower dimension.

5. The adjustable base plate according to claim 4, characterized in that, The fixing seats located at both ends of the first body along its length also include limiting bosses, which are located on the opposite side of the anti-rotation T-slot.

6. A drive unit, characterized in that, The device includes a drive frame body and an adjustable base plate according to any one of claims 1-5. The drive frame body has multiple upper brackets on both sides. The fixed base of the adjustable base plate is inserted into the bottom of the upper bracket. The upper bracket and the fixed base are detachably connected.

7. The driving unit according to claim 6, characterized in that, The upper mounting bases located at both ends of the first body length direction also include limiting notches below them, and the fixing bases located at both ends of the first body length direction also include limiting bosses, which are engaged in the limiting notches.

8. The driving unit according to claim 6, characterized in that, The side of the fixed seat has an anti-rotation T-slot. The upper bracket and the fixed seat are connected by bolts. The head of the bolt is stuck in the lower part of the anti-rotation T-slot, the shank of the bolt is located in the upper part of the anti-rotation T-slot, and the top of the bolt passes through the upper bracket and connects to the washer and nut.

9. The driving unit according to claim 6, characterized in that, The upper bracket is a U-shaped frame structure, with holes at the bottom of the U-shaped frame for bolts to pass through.

10. A scraper conveyor, characterized in that, The device includes the drive unit and power unit of any one of claims 6-9, wherein the power unit is connected to the side of the drive frame body, and the second body adjustable to the base plate is located below the power unit.

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