Concrete dumper

Abstract

The utility model relates to the technical field of constructional engineering, in particular to a concrete dumper which comprises a frame, a charging barrel, a walking assembly, a transmission assembly and a stirring assembly. The charging barrel is fixedly connected to the frame; the walking assembly comprises a first rotating shaft and at least two wheels, the first rotating shaft is rotationally connected to the frame, the first rotating shaft is parallel to the first direction along the rotating axis of the frame, and the wheels are coaxially and fixedly connected to the first rotating shaft; the transmission assembly comprises a first bevel gear, a second rotating shaft and a second bevel gear; the first bevel gear coaxially and fixedly sleeves the first rotating shaft; one end of the second rotating shaft is located in the charging barrel, the other end of the second rotating shaft penetrates through the barrel bottom wall of the charging barrel and then extends to the outer side of the charging barrel, the second rotating shaft is rotationally connected to the charging barrel, the rotating axis of the second rotating shaft and the depth direction of the charging barrel are parallel to the second direction, and the second direction is perpendicular to the first direction; the dumper has the effect of achieving the stirring effect under the condition of no power supply driving in the process of pushing the dumper to walk.

Description

Technical Field

[0001] The present application relates to the technical field of construction engineering, and in particular to a concrete transport vehicle. Background Art

[0002] During the construction process, construction materials such as cement and concrete need to be transported over a certain distance, and small material transport trucks are generally used to transport concrete.

[0003] In the related art, a small material transport vehicle is used to transport concrete. For example, Chinese patent application number 201310079531.X discloses a stirring type material transport vehicle, which includes a barrel, a rotating shaft, a motor, and spiral blades. The barrel is provided with a rotating shaft, and the rotating shaft is provided with spiral blades. The rotating shaft is connected to the motor to drive the spiral blades to rotate so as to achieve stirring of the material in the barrel. Another example is Chinese patent application number 201720360397.4, which discloses a material transport vehicle for construction projects, which includes a material transport vehicle body, a motor, and a stirring shaft. The motor is fixed to the outer end of the material transport vehicle body, and the motor shaft is connected to the rotating shaft at one end of the stirring shaft through a gear reducer, and the other end of the stirring shaft is rotatably connected to a sleeve fixed on the inner wall of the material transport vehicle body.

[0004] The material transport vehicles under the related art are all driven by motors to stir the materials in the barrel. The motors need to be connected to a power source for use. When it rains, the motors of the material transport vehicles placed in an open-air environment may be damaged after contact with water. In addition, the structure of the material transport vehicles under the related art cannot solve the problem of material adhesion in the barrel, resulting in low transportation efficiency. Therefore, there is an urgent need for a material transport vehicle that can achieve stirring without the need for power drive during the moving process of the material transport vehicle. Utility Model Content

[0005] In order to achieve a stirring effect when pushing the material transport vehicle without power drive, the present application provides a concrete material transport vehicle.

[0006] The concrete transport vehicle provided in this application adopts the following technical solution:

[0007] A concrete material transport vehicle comprises a vehicle frame, a material barrel, a travel assembly, a transmission assembly and a mixing assembly;

[0008] The barrel is fixedly connected to the frame;

[0009] The travel assembly includes a first rotating shaft and at least two wheels, the first rotating shaft is rotatably connected to the frame, the first rotating shaft is parallel to the first direction along the rotating axis of the frame, and the wheels are coaxially fixedly connected to the first rotating shaft;

[0010] The transmission assembly includes a first bevel gear, a second rotating shaft and a second bevel gear;

[0011] The first bevel gear is coaxially fixedly sleeved on the first rotating shaft;

[0012] One end of the second rotating shaft is located in the barrel, and the other end is arranged through the bottom wall of the barrel and then extends to the outside of the barrel. The second rotating shaft is rotatably connected to the barrel, and the rotation axis of the second rotating shaft and the depth direction of the barrel are both arranged parallel to the second direction, and the second direction is perpendicular to the first direction;

[0013] The second bevel gear is coaxially fixedly connected to the second rotating shaft, and the second bevel gear is meshingly connected with the first bevel gear;

[0014] The stirring component is located in the barrel and is fixedly connected to the second rotating shaft.

[0015] By adopting the above technical scheme, when transporting materials, due to the long time sometimes, the concrete will produce stratification in the barrel, affecting the final unloading. For this reason, a stirring assembly is provided in the barrel. To drive the stirring assembly to achieve the stirring effect, it is necessary to enable the stirring assembly to rotate along the barrel. Generally, a motor is used for driving. However, in rainy weather, the motor is easily damaged. For this reason, a structure that does not require a motor drive can be provided. During the movement of the material transport vehicle, since the walking assembly rotates along the frame, a first bevel gear is sleeved on the first rotating shaft of the walking assembly, and the second bevel gear is meshed with the first bevel gear, and the rotation axis of the second bevel gear is perpendicular to the rotation axis of the second rotating shaft, so that the walking assembly drives the stirring assembly to rotate through the transmission assembly, mainly through the first bevel gear and the second bevel gear in the transmission assembly to drive the second rotating shaft to rotate along the barrel, so that the first rotating shaft can drive the stirring assembly to rotate during the rotation of the wheel. Therefore, the present application can enable the material transport vehicle to achieve the stirring effect in the barrel while walking.

[0016] Optionally, the number of teeth of the first bevel gear is greater than the number of teeth of the second bevel gear.

[0017] By adopting the above technical solution, since the material transport vehicle is driven by manpower and the concrete in the barrel also has a certain weight, when the wheel speed is constant, in order to maximize the speed of the mixing component, the number of teeth of the first bevel gear is greater than the number of teeth of the second bevel gear, so that in the process of the first rotating shaft driving the first bevel gear and the second bevel gear to rotate, the second bevel gear can provide the mixing component with greater power to stir the concrete in the barrel. Therefore, the present application can provide the mixing component with greater stirring power.

[0018] Optionally, the stirring assembly includes a third rotating shaft and a plurality of connecting rods, the third rotating shaft is coaxially fixedly connected to the second rotating shaft, the connecting rods are connected to the third rotating shaft, and the angle between the connecting rods and the third rotating shaft is greater than 0° and less than 180°.

[0019] By adopting the above technical solution, since the concrete in the barrel has a certain weight, in order to be able to mix it more evenly, a plurality of connecting rods are connected to the third shaft. Under the action of the plurality of connecting rods, a greater stirring force can be provided to achieve a more uniform stirring effect.

[0020] Optionally, the stirring assembly further comprises a scraper, one end of the scraper is connected to the connecting rod, and the other end of the scraper is in contact with the inner circumferential wall of the barrel.

[0021] By adopting the above technical solution, under the action of the stirring assembly, since the concrete will still adhere to the inner wall of the barrel to form residue, for this reason, a scraper is connected to the connecting rod, and the scraper is directly in contact with the side wall of the barrel, so that the scraper is driven to rotate by the third shaft through the connecting rod, and the scraper further scrapes off the concrete on the side wall of the barrel. Therefore, the present application can scrape off the concrete adhered to the side wall of the barrel by the scraper.

[0022] Optionally, the thickness of the scraper itself gradually decreases toward the end away from the connecting rod.

[0023] By adopting the above technical solution, in order to achieve better scraping effect and higher efficiency, the thickness of the scraper itself gradually decreases at the end away from the connecting rod, so that the side of the scraper away from the third rotating shaft is in line contact with the barrel wall as much as possible, so as to achieve better scraping effect.

[0024] Optionally, a plurality of tooth grooves are spaced apart at one end of the scraper close to the side wall of the barrel, and a scraping tooth is formed between every two adjacent tooth grooves.

[0025] By adopting the above technical solution, since hard adhesion may be adhered to the inner wall of the barrel, during the rotation of the scraper along the barrel, the hard adhesion will further hinder the scraper from continuing to rotate. For this reason, a plurality of tooth grooves are provided on the scraper at intervals so that the hard adhesion may exist in the tooth grooves. Therefore, the present application can avoid as much as possible the situation where the scraper is blocked by hard adhesion and cannot rotate.

[0026] Optionally, the connecting rod is slidably connected to the third rotating shaft along the second direction.

[0027] By adopting the above technical solution, in order to enable the scraper to avoid hard adhesions as much as possible, the connecting rod is connected to the third rotating shaft by sliding, so that the scraper connected to the connecting rod can also generate a force to shake up and down along the side wall of the barrel. In the process of shaking up and down, the hard adhesions can be avoided, thereby not affecting the scraper to continue to rotate along the barrel.

[0028] Optionally, the stirring assembly further includes an elastic member, one end of the elastic member is fixedly connected to the third rotating shaft, and the other end of the elastic member is fixedly connected to the connecting rod, and the extension direction of the elastic member is parallel to the second direction.

[0029] By adopting the above-mentioned technical solution, during the interaction of the connecting rod along the third rotating shaft, due to the gravity factor, the connecting rod will slide down instantly and cannot swing up and down. For this reason, the elastic part connected between the connecting rod and the third rotating shaft can play a buffering role to prevent the connecting rod from being unable to swing up and down. Therefore, the present application can play a buffering role for the up and down sliding of the connecting rod on the third rotating shaft.

[0030] Optionally, a flow guide nozzle is protrudingly provided on the barrel wall close to the opening.

[0031] By adopting the above technical solution, in order to pour the concrete out of the barrel in a gathered form, the concrete can be poured out through the guide nozzle at the opening of the barrel, which is more convenient for people to pour.

[0032] Optionally, it also includes a barrel cover, which is detachably connected to the open end of the barrel, and a first groove is formed at one end of the barrel cover close to the bottom wall of the barrel, and an end of the third rotating shaft away from the second rotating shaft is located in the first groove.

[0033] By adopting the above technical solution, since the concrete will flow out from the opening of the barrel when pouring, a barrel cover is detachably connected to the opening of the barrel so that the barrel cover plays a drainage role and the concrete can be discharged from the diversion nozzle. Therefore, when unloading, the present application can play a diversion role.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. The walking assembly in this application drives the stirring assembly to rotate along the barrel through the transmission assembly to achieve stirring of the concrete;

[0036] 2. This application uses a scraper to scrape off the adhered matter;

[0037] 3. This application allows the scraper to swing up and down along the barrel to avoid the scraper from stopping after touching hard adhesives. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural diagram of a concrete transport truck from the first perspective;

[0039] Figure 2 This is a structural diagram of a concrete transport truck from a second perspective.

[0040] Figure 3 It is a schematic diagram of the structure of the stirring assembly and the barrel;

[0041] Figure 4 It is an enlarged view of part A;

[0042] Figure 5 It is a schematic diagram of the structure of the scraper and the connecting rod;

[0043] Figure 6 It is a schematic diagram of the structure of Part B;

[0044] Figure 7 is a partial cross-sectional view of the stirring assembly;

[0045] Figure 8 It is an overall cross-sectional view of a concrete transport truck.

[0046] Explanation of the reference numerals in the accompanying drawings: 1. frame; 11. handle; 12. upright pole; 2. barrel; 21. guide nozzle; 3. walking assembly; 31. first rotating shaft; 32. wheel; 33. bearing; 4. transmission assembly; 41. first bevel gear; 42. second bevel gear; 43. second rotating shaft; 5. stirring assembly; 51. third rotating shaft; 511. dovetail groove; 52. connecting rod; 521. dovetail block; 53. scraper; 531. tooth groove; 532. scraping teeth; 54. elastic member; 6. barrel cover; 61. first groove; 7. screw. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-8 This application is described in further detail.

[0048] The present application embodiment discloses a concrete transport vehicle. Figure 1 A concrete material transport vehicle includes a frame 1, a barrel 2, a traveling assembly 3 and a transmission assembly 4. The frame 1 is used to support the barrel 2, the traveling assembly 3 is rotatably connected to the frame 1, and the transmission assembly 4 is rotatably connected to the barrel 2 through the traveling assembly 3 to realize the rotation of the transmission assembly 4 along the barrel 2.

[0049] Reference Figure 1 Two parallel handles 11 are welded on the frame 1. In order to facilitate the handles 11 to be supported on the ground, a vertical pole 12 is welded on each handle 11. When in use, a person pushes the handles 11 to push the frame 1 to move. The walking assembly 3 is connected to the frame 1 to facilitate the frame 1 to move on the ground.

[0050] Reference Figure 1 and Figure 2The walking assembly 3 includes a first rotating shaft 31 and at least two wheels 32. In this embodiment, two wheels 32 are provided. One wheel 32 is coaxially fixedly connected to each end of the first rotating shaft 31. The first rotating shaft 31 is rotatably connected to the frame 1. The first rotating shaft 31 is parallel to the first direction along the rotation axis of the frame 1. In order to ensure that the first rotating shaft 31 can rotate smoothly along the frame 1, the first rotating shaft 31 is rotatably connected to the frame 1 through a bearing 33, and the outer peripheral wall of the first rotating shaft 31 is interference-fitted with the inner peripheral wall of the bearing 33. The outer peripheral wall of the bearing 33 is also interference-fitted with the frame 1 to ensure that the first rotating shaft 31 slides along the frame 1 while preventing the first rotating shaft 31 from sliding along the frame 1 in the first direction. When driving the frame 1 to walk, the person only needs to hold the handle 11 to drive the frame 1 to walk through the walking assembly 3.

[0051] Reference Figure 1 and Figure 2 The barrel 2 is used to hold concrete. In this embodiment, the barrel 2 is preferably cylindrical, and the top of the barrel 2 is open to facilitate personnel to pour out the concrete; the barrel 2 is penetrated by the frame 1 and fixedly connected to the frame 1, and the barrel 2 is located above the first rotating shaft 31. When the first rotating shaft 31 is in a horizontal state, the central axis of the barrel 2 and the barrel depth of the barrel 2 are arranged along the second direction, and the second direction is perpendicular to the first direction.

[0052] Reference Figure 2 and Figure 3 When using a concrete transport truck to transport concrete, the distance is sometimes long, and because the concrete contains moisture, when the concrete in the barrel 2 is left stationary for a long time, stratification of moisture and other substances such as mineral powder will occur. In order to mix the concrete, the concrete transport truck also includes a transmission component 4 and a stirring component 5. The stirring component 5 is located in the barrel 2, and the rotation of the first rotating shaft 31 along the frame 1 is used as a power source. The first rotating shaft 31 provides power for the stirring component 5 to rotate in the barrel 2 through the transmission component 4 to reduce concrete stratification.

[0053] Reference Figure 2 and Figure 4 The transmission assembly 4 includes a first bevel gear 41, a second rotating shaft 43 and a second bevel gear 42. The first bevel gear 41 is coaxially sleeved and welded to the outer peripheral wall of the first rotating shaft 31. One end of the second rotating shaft 43 is located in the barrel 2 and is connected to the stirring assembly 5, and the other end passes through the bottom wall of the barrel 2 and extends to the outside of the barrel 2. The second rotating shaft 43 is rotatably connected to the barrel 2. The second rotating shaft 43 is arranged along the rotation axis of the barrel 2 parallel to the second direction. The second bevel gear 42 is coaxially sleeved and welded to the second rotating shaft 43. The first bevel gear 41 and the second bevel gear 42 are both 45° bevel gears. The second bevel gear 42 is meshed with the first bevel gear 41, so that the second rotating shaft 43 is driven to rotate on the barrel 2 by the first rotating shaft 31 through the first bevel gear 41 and the second bevel gear 42.

[0054] In order to increase the rotation speed of the stirring assembly 5 along the barrel 2 as much as possible when the rotation speed of the wheel 31 is constant, the number of teeth of the first bevel gear 41 is set to be greater than the number of teeth of the second bevel gear 42 .

[0055] Reference Figure 3 The stirring assembly 5 includes a third rotating shaft 51 and a plurality of connecting rods 52. The third rotating shaft 51 is coaxially fixedly connected to the second rotating shaft 43. The connecting rod 52 is connected to the third rotating shaft 51, and the angle between the connecting rod 52 and the third rotating shaft 51 is greater than 0° and less than 180°. Preferably, in this embodiment, the connecting rod 52 is perpendicular to the third rotating shaft 51. In order to improve the stirring efficiency, in this embodiment, the connecting rod 52 is spaced apart in two layers along the second direction, each layer is provided with three connecting rods 52, and the three connecting rods 52 in each layer are evenly distributed along the circumference of the third rotating shaft 51.

[0056] Reference Figure 5 and Figure 6 In order to scrape off the concrete adhered to the inner wall of the barrel 2, the stirring assembly 5 also includes a plurality of scrapers 53, one end of the scraper 53 is fixedly connected to the connecting rod 52, and the other end is in contact with the inner circumferential wall of the barrel 2. Specifically, each scraper 53 is connected to two connecting rods 52 distributed along the second direction to improve the firmness of the connection between the scraper 53 and the connecting rods 52; the thickness of the scraper 53 gradually decreases toward the end away from the connecting rod 52, so that the side of the scraper 53 away from the third rotating shaft 51 is in a linear contact state with the barrel wall of the barrel 2 as much as possible, thereby achieving a better scraping effect.

[0057] Reference Figure 6 and Figure 7 In addition, since the inner wall of the barrel 2 may be adhered to hard adhesives, in order to prevent the scraper 53 from being unable to continue rotating after touching the hard adhesives, a plurality of tooth grooves 531 are spaced apart at one end of the scraper 53 close to the side wall of the barrel 2, and scraping teeth 532 are formed between each two adjacent tooth grooves 531, so that the scraping teeth 532 can scrape off the concrete adhered to the side wall of the barrel 2; in order to make the hard adhesives as much as possible in the tooth grooves 531, the connecting rod 52 is slidably connected to the third rotating shaft 51 along the second direction, and the connecting rod 52 and the third rotating shaft 51 are connected. The specific connection relationship of the rotating shaft 51 is as follows: a dovetail block 521 is welded to one end of the connecting rod 52 close to the third rotating shaft 51, and a dovetail groove 531 is opened on the side wall of the third rotating shaft 51 along the second direction. The dovetail block 521 is located in the dovetail groove 531, and the dovetail block 521 can slide in the dovetail groove 531 along the second direction, so that under the sliding of the dovetail block 521, the scraper 53 is driven by the connecting rod 52 to slide along the side wall of the barrel 2, so that the hard adhesion is located in the tooth groove, so that the scraper 53 continues to rotate along the barrel 2.

[0058] Reference Figure 7In order to prevent the connecting rod 52 from being unable to shake up and down under the action of gravity to avoid hard adhesions, the stirring assembly 5 also includes a plurality of elastic members 54. In this embodiment, each connecting rod 52 is connected to two elastic members 54, and the extension direction of the elastic member 54 is arranged parallel to the second direction. The elastic member 54 is located in the dovetail groove 531, and the connecting rod 52 is located at the middle position of the dovetail groove 531 along the second direction. Each elastic member 54 is arranged between the connecting rod 52 and the end wall of the dovetail groove 531. One end of the elastic member 54 is welded to the connecting rod 52, and the other end is welded to the groove wall of the dovetail groove 531, so that the two elastic members 54 can buffer the sliding of the connecting rod 52 along the third rotating shaft 51.

[0059] Reference Figure 8 In order to facilitate pouring out the concrete, a guide nozzle 21 is protruding outward from the barrel wall near the opening of the barrel 2, so that the concrete can be discharged from the guide nozzle 21 in a concentrated form. In order to achieve a better drainage effect, the concrete transport vehicle also includes a barrel cover 6 and a plurality of screws 7. The barrel cover 6 is detachably connected to the opening of the barrel 2, and the barrel cover 6 is fixedly connected to the barrel 2 by the screws 7. In this embodiment, the barrel cover 6 is fixedly connected to the barrel 2 in an incompletely covered form, that is, the barrel cover 6 is formed by cutting off a part of a circular plate, and a gap is left between the barrel cover 6 and the guide nozzle 21; in addition, a first groove 61 for accommodating the rotation of the third rotating shaft 51 is opened at the bottom of the barrel cover 6, and one end of the third rotating shaft 51 in the barrel 2 is located in the first groove 61.

[0060] The implementation principle of a concrete transport vehicle in the embodiment of the present application is as follows:

[0061] The concrete material is loaded into the barrel 2 from the opening, and the operator holds the handle 11 and pushes the barrel 2 to the unloading position. During the movement of the wheel 31, the first rotating shaft 31 drives the second rotating shaft 43 to rotate along the barrel 2 through the first bevel gear 41 and the second bevel gear 42, and further drives the third rotating shaft 51 and the scraper 53 to rotate along the barrel 2. The connecting rod 52 connected to the third rotating shaft 51 stirs the concrete, and the scraper 53 stirs the concrete adhered to the inner wall of the barrel 2 to avoid stratification. At the same time, the scraping teeth 531 on the scraper 53 scrape off the adhered matter on the inner wall of the barrel 2. If the scraping teeth 531 touches hard adhered matter, under the action of the elastic member 54, the scraping teeth 531 can generate an instantaneous up and down shaking force, so that the scraping teeth 531 are separated from the hard adhered matter and continue to rotate. When the unloading position is reached, the operator pushes the handle 11 upward to pour the concrete material out of the guide nozzle 21 of the barrel 2.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A concrete transport vehicle, characterized in that: It comprises a frame (1), a barrel (2), a travel assembly (3), a transmission assembly (4) and a stirring assembly (5); The barrel (2) is fixedly connected to the frame (1); The walking assembly (3) comprises a first rotating shaft (31) and at least two wheels (32), the first rotating shaft (31) being rotatably connected to the frame (1), the first rotating shaft (31) being parallel to a first direction along a rotation axis of the frame (1), and the wheels (32) being coaxially fixedly connected to the first rotating shaft (31); The transmission assembly (4) comprises a first bevel gear (41), a second rotating shaft (43) and a second bevel gear (42); The first bevel gear (41) is coaxially fixedly sleeved on the first rotating shaft (31); One end of the second rotating shaft (43) is located in the barrel (2), and the other end is passed through the bottom wall of the barrel (2) and extends to the outside of the barrel (2). The second rotating shaft (43) is rotatably connected to the barrel (2), and the rotation axis of the second rotating shaft (43) and the depth direction of the barrel (2) are parallel to the second direction, and the second direction is perpendicular to the first direction. The second bevel gear (42) is coaxially fixedly connected to the second rotating shaft (43), and the second bevel gear (42) is meshingly connected with the first bevel gear (41); The stirring component (5) is located in the barrel (2), and the stirring component (5) is fixedly connected to the second rotating shaft (43).

2. A concrete transport vehicle according to claim 1, characterized in that: The number of teeth of the first bevel gear (41) is greater than the number of teeth of the second bevel gear (42).

3. A concrete transport vehicle according to any one of claims 1-2, characterized in that: The stirring assembly (5) comprises a third rotating shaft (51) and a plurality of connecting rods (52); the third rotating shaft (51) is coaxially fixedly connected to the second rotating shaft (43); the connecting rods (52) are connected to the third rotating shaft (51); and the angle between the connecting rods (52) and the third rotating shaft (51) is greater than 0° and less than 180°.

4. A concrete transport vehicle according to claim 3, characterized in that: The stirring assembly (5) further comprises a scraper (53), one end of which is connected to the connecting rod (52) and the other end of which is in contact with the inner circumferential wall of the barrel (2).

5. A concrete transport vehicle according to claim 4, characterized in that: The thickness of the scraper (53) gradually decreases toward the end away from the connecting rod (52).

6. A concrete transport vehicle according to claim 5, characterized in that: A plurality of tooth grooves (531) are provided at intervals at one end of the scraper (53) close to the side wall of the barrel (2), and a scraping tooth (532) is formed between every two adjacent tooth grooves (531).

7. A concrete transport vehicle according to claim 6, characterized in that: The connecting rod (52) is slidably connected to the third rotating shaft (51) along the second direction.

8. A concrete transport vehicle according to claim 7, characterized in that: The stirring assembly (5) further comprises an elastic member (54), one end of the elastic member (54) being fixedly connected to the third rotating shaft (51), and the other end of the elastic member (54) being fixedly connected to the connecting rod (52), and the telescopic direction of the elastic member (54) being parallel to the second direction.

9. A concrete transport vehicle according to claim 8, characterized in that: The barrel (2) is provided with a flow guide nozzle (21) protruding from the barrel wall near the opening.

10. A concrete transport vehicle according to claim 9, characterized in that: The invention also comprises a barrel cover (6), wherein the barrel cover (6) is detachably connected to the open end of the barrel (2), and a first groove (61) is formed at one end of the barrel cover (6) close to the bottom wall of the barrel (2), and an end of the third rotating shaft (51) away from the second rotating shaft (43) is located in the first groove (61).

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