A cleaning device for mechanical equipment maintenance
Through the engagement components driven by hydraulic cylinder and motor, the brush and combing mechanism are combined with the brush and the combing mechanism, the problem of flour accumulation on the surface of the conveyor belt is solved, and the efficient cleaning and self-cleaning functions of the brush are realized, which improves the cleaning efficiency and brush life.
Patent Information
- Application Number
- CN202411335700.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2044-09-24
AI Technical Summary
In mechanical equipment, the convex strips on the surface of the conveyor belt accumulate a large amount of flour due to the long-term transportation of flour bags, which makes it difficult to clean, and the prior art is difficult to efficiently clean.
A cleaning device for maintenance of mechanical equipment is designed, including hydraulic cylinders, motor-driven engagement components, brushes and combing mechanisms, to clean the surface of the convex strips through lateral movement of the engagement components and reciprocating scanning of the brushes, combining the cylinder and the combing needle. Cleaning function to achieve efficient cleaning of the surface of the conveyor belt.
Effectively remove flour from the surface of the conveyor belt, improves cleaning efficiency, and through the coordination of the combing needle and the air nozzle, the service life of the brush is extended and the cleanliness is ensured.
Smart Images

Figure CN118850679B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field related to mechanical equipment, and specifically provides a cleaning device for maintaining mechanical equipment. Background Art
[0002] There are many types of mechanical equipment. When the mechanical equipment is in operation, some of its parts or even the mechanical equipment itself can perform different forms of mechanical movement. Mechanical equipment is composed of drive devices, speed change devices, transmission devices, working devices, braking devices, protective devices, lubrication systems, cooling systems, etc.
[0003] Cleaning equipment, as the name implies, is mechanical equipment designed for cleaning. Modern industries involving cleaning include: municipal sanitation, aviation terminals, business buildings, public places, manufacturing workshops, warehousing and logistics, hotels, medical and health care, retail, sports stadiums, etc. Cleaning equipment plays an efficient cleaning role in these places. It reduces the labor cost of cleaning while also improving work efficiency and cleanliness, which is indispensable in modern society.
[0004] When conveying flour bags, conveying equipment generally uses a belt conveyor. There are horizontal convex strips on the surface of the conveyor belt to increase the friction resistance with the transported objects, so as to meet the transportation needs well. However, after transporting flour bags for a long time, a lot of flour will accumulate on the convex strips and the surface of the conveyor belt, which needs to be cleaned. Therefore, we need to improve the above problems. Summary of the invention
[0005] The purpose of the present invention is to solve the problems existing in the background technology and to propose a cleaning device for mechanical equipment maintenance.
[0006] In order to achieve the above objectives, the present invention provides a cleaning device for mechanical equipment maintenance, comprising: a base, a bracket is fixedly installed on the upper surface of one side of the base, a pump body is fixedly installed on the upper surface of the base away from the bracket, the upper surface of the base away from the pump body is connected to a support seat via a lifting mechanism, a slide is sleeved on the outer side of the support seat, the slide and the bracket are slidably matched, an L-shaped mounting seat is connected to the upper outer side of the support seat via a telescopic mechanism, the rear end of the L-shaped mounting seat is slidably matched with the inner side of the support seat, slides are slidably installed inside both sides of the L-shaped mounting seat, meshing components are arranged on the outer sides of the two groups of slides, the middle of the inner side of the L-shaped mounting seat is connected to the meshing component via a driving mechanism, and a cleaning mechanism is arranged at the lower end of the meshing component.
[0007] In the above scheme, further, the lifting mechanism includes a first hydraulic cylinder fixedly installed on the upper surface of one side of the base, the telescopic end of the first hydraulic cylinder is connected to the lower surface of the support seat, two reinforcement rods are symmetrically arranged above the base, the two reinforcement rods are connected to the outer side of the bracket, the inner sides of the two reinforcement rods are threadedly connected to abutment pins, and the two abutment pins are in contact with the outer side of the first hydraulic cylinder.
[0008] In the above scheme, further, the telescopic mechanism includes a second hydraulic cylinder fixedly mounted on the outer side of the slide seat, the second hydraulic cylinder is located above the support seat, and the telescopic end of the second hydraulic cylinder is connected to the outer side of the L-shaped mounting seat.
[0009] In the above scheme, further, the driving mechanism includes a motor fixedly mounted in the middle of the inner side of the L-shaped mounting seat, and a gear is sleeved on the outer side of the output end of the motor, and the gear is meshingly connected with the meshing component.
[0010] In the above scheme, further, the meshing assembly includes racks that are both arranged on the outside of the slide, the inner sides of both ends of the racks are connected to the inner side of the slide through positioning bolts, and the racks are meshed with the gear.
[0011] In the above scheme, further, the cleaning mechanism includes mounting rods respectively mounted on the lower surfaces of both ends of the rack, and a clamping rod is fixedly mounted on the inner sides of the two mounting rods, and a plurality of groups of brushes are mounted on the inner sides of the clamping rods.
[0012] In the above scheme, further, a reinforcement seat is installed between the two mounting rods on the same side, a U-shaped plate is fixedly connected to the outside of the reinforcement seat, sliding grooves are provided on the inner sides of both ends of the U-shaped plate, sliders are slidably installed on the inner sides of the two groups of sliding grooves, sliding sleeves are inserted on the upper inner sides of the two sliders, sliding rods are slidably installed on the inner sides of the two sliding sleeves, a screw pin inserted through a thread on the inside of one side of the corresponding sliding sleeve is against the surface of the sliding rod, a cylinder is provided on the outer side of one end of the corresponding sliding sleeve, and the cylinder is fixedly installed on the upper surface of the U-shaped plate.
[0013] In the above scheme, further, an air inlet pipe is arranged below the U-shaped plate, and multiple groups of combing mechanisms are arranged on the outer side of the air inlet pipe.
[0014] In the above scheme, further, multiple groups of combing mechanisms include blocks that are all sleeved on the outside of the air inlet pipe, wherein two of the blocks are connected to the bottom ends of the sliding rods at the corresponding two ends, and one end of the air inlet pipe is connected to the pump body through a connecting pipe, so the air inlet pipe and the inner side of the block are connected and an air nozzle is installed together, and connecting rods are fixedly installed on the outside of the block and on both sides of the air nozzle, and curved paddle plates are fixedly installed on the ends of the two connecting rods away from the blocks, and multiple clamping shafts are inserted through the inner sides of the two paddle plates, and clamping sleeves are rotatably installed on the outer sides of both ends of the multiple clamping shafts, and frames are installed at equal distances along the circumferential direction on the outsides of the two clamping sleeves, and multiple groups of combing needles are interspersed on the inside of the frames.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] The driving mechanism provided can cause the meshing components at both ends to move back and forth horizontally, so that the corresponding brushes below can sweep back and forth on the surface of the conveyor belt, thereby adapting to the convex strips and cleaning the flour that is easily hidden on both sides of the convex strips. The brushes move back and forth horizontally on both sides, and the direction of the brushes will be deformed. At this time, in order to increase the service life of the brushes and clean the brushes themselves, the slide rod drives the air intake pipe at the lower end to move to the brush position, and the corresponding cylinder can drive the slider and the slide rod assembly to move back and forth, so that the two curved paddles on one side of the sleeve are interspersed with the inner sides of multiple groups of brushes. The curved paddles can push the inside of the brushes to both ends, and the frame and the combing needles contact the surfaces of multiple groups of brushes during the pushing process, which can not only comb the direction of the brushes, but also cooperate with the air nozzle at the rear end to clean the flour adhered to the outside of the brushes, thereby ensuring the cleanliness of the brushes and improving the cleaning effect of the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0018] Figure 2 It is a schematic diagram of the connection between the L-shaped mounting seat and the cleaning mechanism part of the present invention;
[0019] Figure 3 It is a schematic diagram of the connection structure between the brush and the clamping rod of the present invention;
[0020] Figure 4 It is a schematic diagram of the connection structure between the L-shaped mounting seat and the driving mechanism of the present invention;
[0021] Figure 5 This is a schematic diagram of the connection structure of the L-shaped mounting base of the present invention;
[0022] Figure 6 It is a schematic diagram of the connection between the paddle and the sleeve block of the present invention;
[0023] Figure 7It is a schematic diagram of the connection between the U-shaped plate and the cylinder of the present invention;
[0024] Figure 8 For the present invention Figure 6 Enlarged schematic diagram at point A in the middle.
[0025] In the figure: 1. base; 2. bracket; 3. first hydraulic cylinder; 4. reinforcement rod; 5. abutment pin; 6. support seat; 7. second hydraulic cylinder; 8. slide seat; 9. L-shaped mounting seat; 10. slide table; 11. mounting rod; 12. positioning bolt; 13. U-shaped plate; 14. sleeve block; 15. air inlet pipe; 16. brush; 17. reinforcement seat; 18. clamping rod; 19. rack; 20. gear; 21. motor; 22. pump body; 23. cylinder; 24. screw pin; 25. sliding sleeve; 26. slide groove; 27. sliding rod; 28. clamping sleeve; 29. clamping shaft; 30. dial plate; 31. frame; 32. combing needle; 33. connecting rod; 34. slider; 35. air nozzle; 36. connecting pipe. DETAILED DESCRIPTION
[0026] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0028] like Figure 1-Figure 8 The cleaning device for mechanical equipment maintenance shown in the figure comprises: a base 1, a bracket 2 is fixedly installed on one side of the upper surface of the base 1, a pump body 22 is fixedly installed on the side of the upper surface of the base 1 away from the bracket 2, a support seat 6 is connected to the side of the upper surface of the base 1 away from the pump body 22 through a lifting mechanism, a slide seat 8 is slidably fitted on the bracket 2, the slide seat 8 is sleeved on the outer side of the support seat 6, a telescopic mechanism is arranged above the outer side of the support seat 6, an L-shaped mounting seat 9 is connected to the end of the telescopic mechanism, the rear end of the L-shaped mounting seat 9 is slidably fitted with the inner side of the support seat 6, slides 10 are slidably installed inside both sides of the L-shaped mounting seat 9, meshing components are arranged on the outer sides of the two groups of slides 10, the middle of the inner side of the L-shaped mounting seat 9 is connected to the meshing component through a driving mechanism, and a cleaning mechanism is arranged at the lower end of the meshing component.
[0029] The lifting mechanism includes a first hydraulic cylinder 3 fixedly mounted on the upper surface of one side of the base 1. The telescopic end of the first hydraulic cylinder 3 is connected to the lower surface of the support seat 6. Two reinforcement rods 4 are symmetrically arranged above the base 1. The two reinforcement rods 4 are connected to the outer side of the bracket 2. The inner sides of the two reinforcement rods 4 are threadedly connected to the abutment pins 5. The two abutment pins 5 are in contact with the outer side of the first hydraulic cylinder 3.
[0030] The first hydraulic cylinder 3 can drive the upper support seat 6 and the slide seat 8 to slide in the vertical direction on the outside of the bracket 2, so that the height can be adjusted. The reinforcement rods 4 and the abutment pins 5 are arranged on both sides of the first hydraulic cylinder 3 to increase the connection strength between the first hydraulic cylinder 3 and the base 1 and the bracket 2 externally.
[0031] The telescopic mechanism includes a second hydraulic cylinder 7 fixedly mounted on the outside of the slide seat 8 . The second hydraulic cylinder 7 is located above the support seat 6 . The telescopic end of the second hydraulic cylinder 7 is connected to the outside of the L-shaped mounting seat 9 .
[0032] The second hydraulic cylinder 7 can drive the L-shaped mounting seat 9 to telescopically move in the horizontal direction, and then adjust the L-shaped mounting seat 9 in accordance with the position of the conveyor belt.
[0033] The driving mechanism includes a motor 21 fixedly mounted in the middle of the inner side of the L-shaped mounting seat 9, a gear 20 is mounted on the outer side of the output end of the motor 21, the gear 20 is meshed with the meshing assembly, the meshing assembly includes racks 19 both arranged on the outer side of the slide 10, the inner sides of both ends of the rack 19 are connected to the inner side of the slide 10 through the positioning bolts 12, and the rack 19 is meshed with the gear 20;
[0034] After the motor 21 is connected to the power supply, it drives the gear 20 at the output end to rotate, meshing with the racks 19 on both sides, so that the slide 10 slides on the inner side of the L-shaped mounting seat 9. The reverse lateral movement along the horizontal direction can fit the convex strips on the surface of the conveyor belt to clean the flour on the inner side of the convex strips.
[0035] Under the connection of the positioning bolts 12 , the two sets of racks 19 are stably arranged on the outside of the slide 10 .
[0036] The cleaning mechanism comprises mounting rods 11 respectively mounted at two ends of the lower surface of the rack 19 , a clamping rod 18 is fixedly mounted on the inner sides of the two mounting rods 11 , and a plurality of groups of brushes 16 are mounted on the inner sides of the clamping rod 18 .
[0037] The multiple groups of brushes 16 are made of plastic material, which is wear-resistant and low-cost, and are installed at the lower end of the rack 19 through the clamping rod 18 for use.
[0038] A reinforcement seat 17 is installed between the two mounting rods 11 on the same side, and a U-shaped plate 13 is fixedly connected to the outside of the reinforcement seat 17. Slide grooves 26 are provided on the inner sides of both ends of the U-shaped plate 13. Slide blocks 34 are slidably installed on the inner sides of the two sets of slide grooves 26. Slide sleeves 25 are inserted on the upper inner sides of the two slide blocks 34. Slide rods 27 are slidably installed on the inner sides of the two slide sleeves 25. The inner sides of the corresponding one side of the slide sleeve 25 are respectively threaded with screw pins 24 that are against the surface of the slide rod 27. The outer sides of the corresponding one end of the slide sleeve 25 are respectively provided with cylinders 23, and the cylinders 23 are fixedly installed on the upper surface of the U-shaped plate 13.
[0039] The reinforcement seat 17 can fix the U-shaped plate 13 on the lower end of the rack 19, so that the inner slider 34, the slide rod 27, the sleeve 25 and other components can correspond to the position of the brush 16, thereby facilitating the self-cleaning of the brush 16 later.
[0040] An air inlet pipe 15 is arranged below the U-shaped plate 13, and multiple combing mechanisms are arranged outside the air inlet pipe 15. The multiple combing mechanisms include sleeve blocks 14 that are sleeved on the outside of the air inlet pipe 15, wherein two sleeve blocks 14 are connected to the bottom ends of the slide bars 27 at the corresponding two ends, one end of the air inlet pipe 15 is connected to the pump body 22 through a connecting pipe 36 that is installed in communication, and an air nozzle 35 is installed on the inner side of the air inlet pipe 15 and the sleeve blocks 14 that are connected together;
[0041] The pump body 22 is an air pump that, after being connected to a power source, delivers airflow to the corresponding air inlet pipe 15 through the connecting pipe 36 , and then sprays out through the air nozzle 35 , so as to clean the flour inside the brush 16 .
[0042] Connecting rods 33 are fixedly installed on the outside of the sleeve block 14 and on both sides of the air nozzle 35. A curved paddle plate 30 is fixedly installed on one end of the two connecting rods 33 away from the sleeve block 14. Multiple card shafts 29 are inserted through the inner sides of the two paddle plates 30. Card sleeves 28 are rotatably installed on the outer sides of both ends of the multiple card shafts 29. Frames 31 are installed at equal distances along the circumferential direction on the outside of the two card sleeves 28. Multiple groups of combing needles 32 are interspersed on the inner side of the frame 31. The curved paddle plate 30 can push the inside of the multiple groups of brushes 16 to both ends during the movement. The frame 31 and the combing needles 32 contact the surfaces of the multiple groups of brushes 16 by friction during the pushing process. The frame 31 and the combing needles 32 rotate, and the combing needles 32 comb the deformed brushes 16, and can also cooperate with the air nozzle 35 at the rear end to clean the flour adhered to the outside of the brush 16.
[0043] Working principle: When in use, place the device on one side of the conveyor belt, then start the conveyor belt, and through the driving of the lifting mechanism and the telescopic mechanism, the L-shaped mounting seat 9 assembly is close to the surface of the conveyor belt, and multiple groups of brushes 16 contact the surface of the conveyor belt. Then, driven by the driving mechanism, the slides 10 at both ends and the clamping rods 18 are driven to move back and forth, so that the brushes 16 at the corresponding lower side can sweep back and forth on the surface of the conveyor belt, thereby cleaning the flour that is easily hidden on both sides of the convex strip. After stopping, the worker removes the screw pin 24 on the outer side of the sliding sleeve 25, and the sliding rod 27 drives the air intake pipe at the lower end. 15 moves to the position of the brush 16, and the corresponding cylinder 23 can drive the slider 34 and the slide rod 27 assembly to move back and forth, so that the two curved paddles 30 on one side of the sleeve block 14 are reciprocated and inserted into the inner side of the multiple groups of brushes 16, and the curved paddles 30 can push the inside of the brush 16 to both ends, and the frame 31 and the combing needle 32 are in contact with the surface of the multiple groups of brushes 16 during the pushing process, which can not only comb the direction of the brush 16, but also cooperate with the air nozzle 35 at the rear end to clean the flour adhered to the outer side of the brush 16, thereby ensuring the cleanliness of the brush 16 and improving the cleaning effect of the conveyor belt.
[0044] As described above, in order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.
[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0047] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, it can be understood that the specific meanings of the above terms in the present invention are only the preferred embodiments of the present invention, and are not other forms of limitations on the present invention. Any technician familiar with this profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.
Claims
1. A cleaning device for mechanical equipment maintenance, include: The base (1) is characterized in that: a bracket (2) is fixedly mounted on the upper surface of one side of the base (1), a pump body (22) is fixedly mounted on the upper surface of the side of the base (1) away from the bracket (2), the upper surface of the side of the base (1) away from the pump body (22) is connected to a support seat (6) through a lifting mechanism, a slide seat (8) is sleeved on the outer side of the support seat (6), the slide seat (8) and the bracket (2) are slidably matched, an L-shaped mounting seat (9) is connected to the upper outer side of the support seat (6) through a telescopic mechanism, the rear end of the L-shaped mounting seat (9) is slidably matched with the inner side of the support seat (6), slides (10) are slidably mounted on the inside of both sides of the L-shaped mounting seat (9), the outer sides of the two groups of slides (10) are provided with meshing components, the middle of the inner side of the L-shaped mounting seat (9) is connected to the meshing component through a driving mechanism, and the lower end of the meshing component is provided with a cleaning mechanism; The cleaning mechanism comprises mounting rods (11) respectively mounted on the lower surfaces of both ends of the rack (19), a clamping rod (18) being fixedly mounted on the inner sides of the two mounting rods (11), and a plurality of groups of brushes (16) being mounted on the inner sides of the clamping rods (18); A reinforcement seat (17) is installed between the two mounting rods (11) on the same side. A U-shaped plate (13) is fixedly connected to the outer side of the reinforcement seat (17). Slide grooves (26) are provided on the inner sides of both ends of the U-shaped plate (13). Slide blocks (34) are slidably installed on the inner sides of the two groups of slide grooves (26). Slide sleeves (25) are inserted on the upper inner sides of the two slide blocks (34). Slide rods (27) are slidably installed on the inner sides of the two slide sleeves (25). A screw pin (24) inserted through a thread is abutted against the surface of the slide rod (27) on the inner side of the corresponding one side of the slide sleeve (25). A cylinder (23) is provided on the outer side of one end of the corresponding slide sleeve (25). The cylinder (23) is fixedly installed on the upper surface of the U-shaped plate (13). An air inlet pipe (15) is arranged below the U-shaped plate (13), and a plurality of combing mechanisms are arranged outside the air inlet pipe (15); The plurality of combing mechanisms include sleeve blocks (14) each sleeved on the outside of an air inlet pipe (15), wherein two of the sleeve blocks (14) are connected to the bottom ends of the slide bars (27) at the corresponding two ends, one end of the air inlet pipe (15) is connected to the pump body (22) via a connecting pipe (36) which is connected thereto, so that the air inlet pipe (15) and the inner side of the sleeve block (14) are connected thereto and an air nozzle (35) is installed thereon, connecting rods (33) are fixedly installed on the outside of the sleeve block (14) and on both sides of the air nozzle (35), a bent paddle plate (30) is fixedly installed on one end of the two connecting rods (33) away from the sleeve block (14), a plurality of clamping shafts (29) are inserted through the inner sides of the two paddle plates (30), a plurality of clamping shafts (29) are rotatably installed on the outer sides of the two ends of the plurality of clamping shafts (29), a frame (31) is installed on the outer sides of the two clamping shafts (28) at equal distances in the circumferential direction, and a plurality of combing needles (32) are inserted inside the frame (31).
2. A cleaning device for mechanical equipment maintenance according to claim 1, Features: The lifting mechanism comprises a first hydraulic cylinder (3) fixedly mounted on an upper surface of one side of the base (1); a telescopic end of the first hydraulic cylinder (3) is connected to a lower surface of a support seat (6); two reinforcing rods (4) are symmetrically arranged above the base (1); the two reinforcing rods (4) are connected to an outer side of the bracket (2); the inner sides of the two reinforcing rods (4) are both threadedly connected to abutment pins (5); and the two abutment pins (5) are in contact with the outer side of the first hydraulic cylinder (3).
3. A cleaning device for mechanical equipment maintenance according to claim 1, Features: The telescopic mechanism comprises a second hydraulic cylinder (7) fixedly mounted on the outside of a sliding seat (8), the second hydraulic cylinder (7) being located above the supporting seat (6), and the telescopic end of the second hydraulic cylinder (7) being connected to the outside of an L-shaped mounting seat (9).
4. A cleaning device for mechanical equipment maintenance according to claim 1, Features: The driving mechanism comprises a motor (21) fixedly mounted in the middle of the inner side of the L-shaped mounting seat (9), a gear (20) being sleeved on the outer side of the output end of the motor (21), and the gear (20) is meshingly connected with the meshing assembly.
5. A cleaning device for mechanical equipment maintenance according to claim 4, Features: The meshing assembly comprises racks (19) both arranged on the outside of the slide (10), the inner sides of both ends of the racks (19) being connected to the inner side of the slide (10) via positioning bolts (12), and the racks (19) are meshed with the gear (20).
