CN116176506A

CN116176506A - A track device used in a new car washing machine

Info

Publication number: CN116176506A
Application number: CN202310082615.2A
Authority: CN
Inventors: 钱峰
Original assignee: Shanghai Keling Naike Intelligent Equipment Co ltd
Current assignee: Shanghai Keling Naike Intelligent Equipment Co ltd
Priority date: 2022-07-27
Filing date: 2023-01-18
Publication date: 2023-05-30
Also published as: CN219446938U

Abstract

The invention relates to the technical field of vehicle manufacturing, and discloses a novel track device used in a car washing machine. In order to solve the problem that the distance between the guide rails changes and the car washing machine cannot be used normally, the following technical solutions are proposed. The driving wheel shaft (10) has a shaft shoulder, that is, the middle section is thick and the two sides are thin; the middle section of the driving wheel shaft (10) is fixedly connected with the driving wheel (6); the driving wheel shaft (10), one side and the first bearing The seat assembly is slidingly connected; the other side is slidingly connected with the second bearing block assembly; the driven wheel shaft (13) has a shoulder, that is, the middle section is thick and the two sides are thin; each bearing block assembly includes a bearing seat (9) and a bearing ( 8). The setting situation of driven wheel shaft (13) is identical with the setting situation of driving wheel shaft (10). The beneficial effect is that the car washing machine can still move normally and smoothly when the distance between the guide rails changes.

Description

Novel track device for car washer

Technical Field

The invention relates to the technical field of vehicle manufacturing, in particular to a novel track device for a car washer.

Background

After a period of use, the outer surface of the car needs to be cleaned to keep clean and beautiful appearance. In the past, cleaning was performed manually; in recent years, fully automatic car washes are increasingly occurring.

The full-automatic car washer is arranged to be of a portal frame structure, and the car washer is used for cleaning the car when the car to be cleaned is parked in the center in front of the car washer, and after a driver of the car gets off the car, the car washer cleans the car. In the cleaning process, the car washer moves back and forth repeatedly through the wheels at the bottom and the two guide rails on the ground, so that all parts of the car surface are cleaned.

Considering the cost factor and the relation of car washing charge amount, generally, the engineering construction of the ground provided with the guide rail is relatively simple, that is, the construction with high strength requirement on the ground with thick reinforced cement is not generally carried out. Because the ground construction is comparatively simple and thin, when the car washer is used for a period of time, the concrete ground subsides unevenly, so that the guide rails deform, and the distance between the two guide rails changes. Such changes result in unsmooth forward and backward movement of the car washer due to light weight, and in the car washer being blocked and not working due to heavy weight.

For the problems caused by the change of the guide rail distance of the car washer, the manufacturers and the users related to the car washer want to have a solution.

Disclosure of Invention

In order to solve the problem that the car washer cannot work normally due to the change of the distance between the guide rails, the invention provides the following technical scheme.

A novel rail set that car washer used includes: the guide rail, car washer frame, and wheels arranged at the lower part of the frame; the guide rail and the wheel are embedded;

the car washer is of a gantry structure with symmetrical left and right sides; each side is symmetrically provided with a walking motor, a transmission mechanism, a driving wheel mechanism and a driven wheel mechanism;

an output shaft of the walking motor is in transmission connection with the driving wheel mechanism through a transmission mechanism;

the driving wheel mechanism comprises: the device comprises a driving wheel, a driving wheel shaft, a first bearing seat assembly, a second bearing seat assembly and a driving wheel mounting frame; the driving wheel mounting frame is fixedly connected with the frame; the first bearing seat assembly and the second bearing seat assembly are fixedly connected with the driving wheel mounting frame; the driving wheel axle is provided with a shaft shoulder, namely, the middle section is thick and the two sides are thin; the middle section of the driving wheel shaft is fixedly connected with the driving wheel; one side of the driving wheel shaft is in sliding connection with the first bearing seat assembly; the other side of the first bearing assembly is connected with the second bearing assembly in a sliding way;

the driven wheel mechanism includes: the device comprises a driven wheel, a driven wheel shaft, a third bearing seat assembly, a fourth bearing seat assembly and a driven wheel mounting frame; the driven wheel mounting frame is fixedly connected with the frame; the third bearing seat assembly and the fourth bearing seat assembly are fixedly connected with the driven wheel mounting frame; the driven wheel axle is provided with a shaft shoulder, namely, the middle section is thick and the two sides are thin; the middle section of the driven wheel shaft is fixedly connected with the driven wheel; one side of the driven wheel shaft is in sliding connection with the third bearing seat assembly; the other side of the first bearing seat is connected with a fourth bearing seat component in a sliding way;

a first bearing housing assembly, a second bearing housing assembly, a third bearing housing assembly, a fourth bearing housing assembly, the aforementioned four bearing housing assemblies each comprising a bearing housing and a bearing.

The beneficial effects of the invention are as follows: under the condition that the distance between the guide rails changes, the distance between the wheels of the car washer can be adjusted in a self-adaptive mode, so that the car washer can move normally and smoothly, and the situation that the wheels are clamped is avoided.

Drawings

FIG. 1 is a schematic perspective view of a car washer, with arrows representing the direction of front view;

FIG. 2 is a front view of the track assembly of the present invention, the view of the view being in the direction of the arrow in FIG. 1, and the view omitting the upper portion of the car washer;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at I, with an enlargement ratio of 3:1;

FIG. 5 is a schematic view of the driven wheel mechanism of the present invention;

FIG. 6 is one of the schematic diagrams of the rail and wheel inlay situation;

FIG. 7 is a second schematic illustration of rail and wheel nesting;

FIG. 8 is a third schematic illustration of rail and wheel nesting;

FIG. 9 is a fourth schematic illustration of a rail and wheel inlay situation;

FIG. 10 is a schematic diagram of one of the second embodiment, wherein the driving wheel, the driving axle, etc. are assembled together;

FIG. 11 is a schematic view of the active axle of FIG. 10;

FIG. 12 is a schematic view of the assembly of FIG. 10 assembled into a bearing housing assembly at each end;

FIG. 13 is a schematic view of the drive axle of FIG. 12 with the drive wheel slid to the left;

FIG. 14 is a schematic view of the drive axle of FIG. 12 with the drive wheel slid to the right;

FIG. 15 is a second schematic view of the second embodiment, showing the driven wheel, driven axle, and bearing housing assembly together;

fig. 16 is a schematic view of the track device according to the second embodiment of the present invention, in which the wheels and the guide rail are separated vertically.

Reference numerals in the drawings indicate

1. A car washer; 2. a guide rail; 3. a walking motor; 4. a frame; 5. a chain; 6. a driving wheel; 7. a main wheel mounting rack; 8. a bearing seat; 9. a bearing; 10. a driving wheel axle; 11. driven wheel; 12. a driven wheel mounting rack; 13. driven wheel axle; 14. a driven sprocket set screw; 15. a driven sprocket; 20. a first bearing housing assembly; 21. a passive sprocket attachment tab. A. The left side gap of the driving wheel shaft; B. the right side gap of the driving wheel shaft; C. left side gap of driven wheel axle; D. the right side gap of the driven wheel shaft; q, forward looking direction; w, guide rail spacing.

The invention is described in further detail below with reference to the drawings and the detailed description.

Detailed Description

In the prior art, when the car washer is used for a period of time, the distance between the two guide rails can change. Such changes result in unsmooth forward and backward movement of the car washer due to light weight, and in the car washer being blocked and not working due to heavy weight.

In order to solve the problems caused by the change of the distance between the guide rails, the invention provides the following general technical scheme.

1. A novel rail set that car washer used includes: the guide rail 2, the car washer rack 4 and wheels arranged at the lower part of the rack 4; the guide rail 2 and the wheels are embedded;

the car washer 1 is of a gantry structure with symmetrical left and right sides; each side is symmetrically provided with a walking motor 3, a transmission mechanism, a driving wheel mechanism and a driven wheel mechanism;

an output shaft of the walking motor 3 is in transmission connection with the driving wheel mechanism through a transmission mechanism;

the driving wheel mechanism comprises: a driving wheel 6, a driving wheel shaft 10, a first bearing seat assembly, a second bearing seat assembly and a driving wheel mounting frame 7; the driving wheel mounting frame 7 is fixedly connected with the frame 4; the first bearing seat assembly and the second bearing seat assembly are fixedly connected with the driving wheel mounting frame 7; the driving wheel axle 10 is provided with a shaft shoulder, namely, the middle section is thick and the two sides are thin; the middle section of the driving wheel shaft 10 is fixedly connected with the driving wheel 6; one side of the driving wheel axle 10 is in sliding connection with the first bearing seat assembly; the other side of the first bearing assembly is connected with the second bearing assembly in a sliding way;

the driven wheel mechanism includes: driven wheel 11, driven wheel axle 13, third bearing block assembly, fourth bearing block assembly, and driven wheel mount 12; the driven wheel mounting frame 12 is fixedly connected with the frame 4; the third bearing seat assembly and the fourth bearing seat assembly are fixedly connected with the driven wheel mounting frame 12; the driven wheel shaft 13 is provided with a shaft shoulder, namely, the middle section is thick and the two sides are thin; the middle section of the driven wheel shaft 13 is fixedly connected with the driven wheel 11; one side of the driven wheel shaft 13 is in sliding connection with the third bearing seat assembly; the other side of the first bearing seat is connected with a fourth bearing seat component in a sliding way;

a first bearing housing assembly, a second bearing housing assembly, a third bearing housing assembly, a fourth bearing housing assembly, the aforementioned four bearing housing assemblies each comprising a bearing housing 9 and a bearing 8.

The above is a general technical solution of the present invention. Next, description and explanation are made with reference to fig. 1, 2, 3, 4 and 5.

FIG. 1 is a schematic perspective view of a car washer, with arrows representing the direction of front view; FIG. 2 is a front view of the track assembly of the present invention, the view of the view being in the direction of the arrow in FIG. 1, and the view omitting the upper portion of the car washer; FIG. 3 is a left side view of FIG. 2; FIG. 4 is an enlarged view of a portion of FIG. 3 at I, with an enlargement ratio of 3:1; fig. 5 is a schematic view of the driven wheel mechanism of the present invention.

1. As shown in fig. 1, the car washer 1 has a gantry structure with symmetry on the left and right sides.

Each side is symmetrically provided with a walking motor 3, a transmission mechanism, a driving wheel mechanism and a driven wheel mechanism. And (3) injection: these mechanisms, etc., are not depicted in fig. 1, but can be seen from fig. 2, 3, 4 and 5.

2. See fig. 2, 3, 4. An output shaft of the walking motor 3 is in transmission connection with the driving wheel mechanism through a transmission mechanism; the transmission in fig. 3 is a chain transmission. The output shaft of the walking motor 3 drives the gearbox equipment to enable the rotating speed to be proper, then drives the driving sprocket to operate, and then drives the driven sprocket 15 to rotate through a chain. The driven sprocket 15, the driving wheel shaft 10 and the driving wheel 6 are coaxially fixed together, so that when the driven sprocket 15 rotates, the driving wheel 6 also rotates synchronously. The transmission mechanism may be a synchronous belt transmission, or a gear transmission, or the like, in addition to the chain transmission.

3. The diameter of the driving wheel axle 10 is smaller than that of the middle section of the wheel axle, and the driving wheel axle 10 and the middle section of the wheel axle are respectively connected with a bearing seat assembly in a sliding manner. I.e. each side of the driving axle 10, passes through bearings in the bearing housing. The portions of the drive axle 10 on both sides with a small diameter may also be referred to as journals.

Each side of the driving wheel axle 10 is respectively penetrated in a bearing in the bearing seat; the side of the driving axle 10 has a diameter slightly smaller than the inner diameter of the bearing, as long as the side of the driving axle 10 can slide axially in the bearing or can move axially. Further, the side diameter of the drive axle 10 cannot be too small; too small a diameter, the driving axle 10 may shake when rotating; and sloshing is to be avoided.

Further, the amplitude of the axial movement is limited within a certain range, and when the shoulder step of the driving axle 10 hits the bearing seat (or hits the bearing), the axial sliding cannot be continued, but the axial sliding in the opposite direction can still be performed. The above can be understood by combining the two elliptical ring portions drawn by the two-dot chain line in fig. 4.

The car washer has been used for a long time, the interval between the two guide rails can be changed; however, such variations are also generally within certain limits in engineering practice. Therefore, the value of the change of the distance between the guide rails can be estimated according to the working experience, and then the range of the axial sliding value of the driving wheel axle 10 is determined in advance during design and manufacture, so that the expected purpose can be achieved. When the distance between the two guide rails changes, the two driving wheel shafts 10 which are symmetrically arranged left and right can adaptively react, the distance between the guide rails is reduced, and the two driving wheel shafts 10 move towards each other, namely, move towards the center, so that the distance between the two driving wheels is reduced; on the contrary, the guide rail distance is increased, and the two driving wheel shafts 10 move away from each other, namely, the two driving wheel shafts 10 move outwards respectively, so that the distance between the two driving wheels is also increased; therefore, the car washer can smoothly move back and forth under the condition that the distance between the guide rails is changed.

4. The sliding principle of the driven wheel shaft is identical with that of the driving wheel shaft; the sliding principle of the driven axle is also understood when the axial sliding of the driving axle 10 is understood. May be understood in conjunction with fig. 5 and with reference to fig. 4.

5. Since the rails 2 and the wheels are embedded, when the distance between the two rails 2 is changed, the wheels are pushed by the rails 2. 1. When the distance between the guide rails 2 becomes large, the wheels are subjected to an outward thrust, and the driving wheel shafts 10 are also subjected to an outward thrust, so that the driving wheel shafts 10 slide outward, resulting in a large distance between the two driving wheels 6. The situation is the same for the driven wheel 11. 2. When the distance between the guide rails 2 becomes smaller, the wheels receive inward thrust, i.e., thrust in the center direction, and the driving wheel shafts 10 receive inward thrust, so that the driving wheel shafts 10 slide inward, resulting in a smaller distance between the two driving wheels 6. The situation is the same for the driven wheel 11.

Example 1

The guide rail 2 and the wheels are embedded to ensure that the wheels always move in the guide rail; there are many patterns for the two mosaics, and 4 kinds are exemplified below.

1. The periphery of the wheel is an inward triangle, the upper side of the guide rail 2 is a convex triangle, and the two triangles are matched and embedded; as will be appreciated in connection with fig. 6. In fig. 6, 7 and 8, the upper part of the figures is a wheel.

2. The periphery of the wheel is a convex triangle, the upper side of the guide rail 2 is a sunken triangle, and the two triangles are matched and embedded; as will be appreciated in connection with fig. 7.

3. The periphery of the wheel is in an inward-sinking platform shape, the upper side of the guide rail 2 is in a convex platform shape, and the two platforms are matched and embedded in shape; as will be appreciated in connection with fig. 8.

4. The periphery of the wheel is in a convex platform shape, the upper side of the guide rail 2 is in a sunken platform shape, and the two platforms are matched and embedded in shape; as will be appreciated in connection with fig. 9.

Example two

In this embodiment, the distance between the two guide rails is 3200mm; correspondingly, the distance between the two driving wheels and the distance between the two driven wheels are 3200mm.

After the car washer is used for a period of time, the distance between the two guide rails changes due to uneven sedimentation of the poured concrete ground and the like, namely, the distance between the two guide rails becomes larger or smaller. Such changes, for the car washing machine in the prior art, may cause unsmooth back and forth movement, and even cause the wheels of the car washing machine to be blocked and not work.

Hereinafter, the state of the art will be described in more detail. In the car washer of the prior art, the interval of two action wheels is fixed, and the interval of two driven wheels is also fixed. Many engineering practices show that when the distance between two guide rails changes by more than 1mm, that is, for a car washer with 3200mm guide rail distance, driving wheel distance and driven wheel distance, when the distance between two guide rails is more than 3201mm, or when the distance between two guide rails is less than 3199mm, the front and back movement of wheels of the car washer is not smooth; also, when the distance between the two rails varies by more than 1.5mm, that is, when the distance between the two rails is more than 3201.5mm, or when the distance between the two rails is less than 3198.5mm, the wheels of the car washer are caught.

In the prior art, the problems caused by the change of the guide rail spacing of the car washer can be overcome and solved by the invention, and the invention is described below.

The rails laid on the freshly poured concrete floor, we assume: the two newly arranged guide rails are parallel, and the interval between the two guide rails is 3200mm.

Fig. 10 is one of the schematic diagrams in the second embodiment, and is a schematic diagram of the assembly of the driving wheel, the driving axle, and the like. Wherein: the driven sprocket 15 is fixedly connected with the driving wheel 6 through a driven sprocket connecting sheet 21, four screws are used, and a welding process is added, so that the fixed connection is firm and reliable. -injection: in fig. 10, the driven sprocket 15 is not shown.

FIG. 11 is a schematic view of the active axle of FIG. 10; the driving wheel axle is provided with a shaft shoulder, namely, the middle section is thick and the two sides are thin; the two sides of the driving wheel axle are in sliding connection with the bearings. The selected bearing model is UCP205, and the inner diameter size of the bearing is

Two sides of the driving axle, the diameter basic dimension (also called nominal dimension) of each side of which is +.>

The practically allowable tolerance dimensions are

In other words, the upper deviation is-0.015 and the lower deviation is-0.052. Thus, the diameter of the two side details of the driving axle, either side detail, is 24.985mm for the maximum allowable dimension and 24.948mm for the minimum allowable diameter.

Further description of the above dimensions. For the bearing with an inner diameter dimension of 25mm, as referred to above, this embodiment proposes to proceed in two steps when determining the diameter dimension of its corresponding shaft.

And a first step. Taking economical, technical and processing difficulty and other factors into comprehensive consideration, selecting a base hole system and clearance fit h9 tolerance, and looking up a table to obtain: nominal size

Tolerance of the shaft, upper deviation of 0, lower deviation of-0.052; namely: the maximum diameter limit of the shaft is 25mm, the minimum diameter limit is 24.948mm, and the tolerance range (tolerance band) is 0.052.

And a second step. The present embodiment uses the table look-up result as preliminary data and then adjusts. The maximum diameter limit size of the thin shafts at the two sides of the driving wheel shaft is adjusted from 25mm to 24.985mm; while the minimum diameter limit size remains unchanged, still 24.948mm. By such adjustment, the processing and manufacturing difficulty is not greatly changed, and the sliding performance of the bearing and the shaft can be obviously improved. Therefore, the final diameter size is

Fig. 12 is a schematic view of the assembly of fig. 10 with bearing block assemblies mounted on each end. Each bearing housing set 20 includes a bearing housing and a bearing positioned therein. The thin shafts on two sides of the driving wheel shaft respectively penetrate into bearings in a bearing seat assembly, and the thin shafts and the bearings can transversely slide in a certain range.

See fig. 2, 4. The bearing seat is fixedly connected with the driving wheel mounting frame 7; the driving wheel mounting frame 7 is fixedly connected with the frame 4.

The description will be continued with reference to fig. 12. A in fig. 12 is a left void size, and B is a right void size. When the active axle is in the a=b condition, we can name this state as the axle centered state. In this embodiment, in the wheel axle centered state, a=4mm, b=4mm, i.e. a=b=4mm.

When the active axle slides to the left to the end, see fig. 13, a=0 mm, b=8 mm; when the active axle slides to the right to the end, see fig. 14, a=8mm, b=0mm. The aforementioned "slide to the end" means as follows.

The driving wheel axle is provided with a shaft shoulder, namely, the middle section is thick and the two sides are thin; the details of the driving axle can slide axially (transversely) with the bearing. When the driving wheel shaft slides leftwards until the shaft shoulder touches the left bearing seat, the driving wheel shaft slides leftwards to the end; when the driving wheel shaft slides to the right until the shaft shoulder touches the right bearing seat, the driving wheel shaft slides to the right to the end; as will be appreciated with reference to fig. 11, 12, 13 and 14.

In summary, the details of the driving axle can slide left or right in the bearing; also in this embodiment, the distance from leftmost to rightmost is 8mm. Of course, if the present embodiment is overridden (i.e., disengaged), other suitable distance dimensions are possible as the case may be.

Further stated, when the active axle is in the axle centered state, it can slide 4mm to the left; and, when the active axle is in an axle-centered state, it can slide 4mm to the right.

After a thorough understanding of the principles of the above active axle slip, it will be readily appreciated upon reading fig. 15: the two side parts of the driven wheel shaft can also slide leftwards or rightwards in the bearing; also in this embodiment, the distance from the left-most to the right-most of the two side details of the driven axle is also 8mm. Also, when the driven wheel axle is in the wheel axle centering state, it can slide to the left by 4mm; and, when the driven axle is in an axle-centered state, it can slide 4mm to the right.

Fig. 16 is a schematic view of the track device of the second embodiment, in which the wheels and the guide rail are separated vertically. Reference symbol W in the figure is a rail pitch. When the distance between the guide rails changes, the guide rails can push the wheels due to the embedded relationship between the guide rails and the wheels, so that the driving wheel shaft and the driven wheel shaft slide. Further, when the guide rail distance W becomes larger, the front two driving wheel shafts slide outwards respectively, so that the distance between the two driving wheels is also increased; simultaneously, the rear two driven wheel shafts slide outwards respectively, so that the distance between the two driven wheels is also increased. Conversely, when the guide rail distance W is reduced, the front two driving wheel shafts slide towards the center respectively, so that the distance between the two driving wheels is reduced; simultaneously, the rear two driven wheel shafts slide towards the center respectively, so that the distance between the two driven wheels is also reduced.

Previously we assumed that: the two newly arranged guide rails are parallel, and the interval between the two guide rails is 3200mm. When the car washer runs for a long time, the ground is basically stable, sedimentation can be regarded as stopping, the change of the distance between the two guide rails reaches a limit value, and the change can be regarded as no longer continuous; according to the data obtained by construction and operation practice for many years, the limit value of the distance change between two guide rails is considered to be +/-5 mm, namely: the distance between the two guide rails, if larger, has a limit value of 3205mm, and does not become larger any further later; in the opposite direction, the distance between the two guide rails, if smaller, has a limit value of 3195mm and is not further smaller afterwards.

The description is continued with reference to fig. 16. 1. If the guide rail distance is increased by 5mm and reaches the limit value of 3205mm, the left driving wheel axle can slide at most by 4mm from the central state of the wheel axle, the right driving wheel axle can also slide at most by 4mm from the central state of the wheel axle, the two driving wheel axles are added in a sliding way, the maximum sliding distance is increased by 8mm, and the capability of expanding the distance between the two driving wheels by 8mm is provided, so that the guide rail distance is increased by 5mm, and the allowance is provided. In the same way, the distance between the two driven wheels has the capability of expanding 8mm, and can completely cope with the situation that the distance between the guide rails is increased by 5 mm.

2. If the guide rail distance is reduced by 5mm and reaches the limit value of 3195mm, the left driving wheel axle can slide by 4mm at most from the central state of the wheel axle, the right driving wheel axle can slide by 4mm at most from the central state of the wheel axle, the two driving wheel axles can slide and add up at most by 8mm, and the capability of reducing the distance between the two driving wheels by 8mm is provided, so that the guide rail distance is reduced by 5mm and the allowance is provided. In the same way, the distance between the two driven wheels has the capability of reducing the distance by 8mm, and can completely cope with the situation that the distance between the guide rails is reduced by 5 mm.

Summarizing, the distance between guide rails of the car washer is changed, and the distance between the guide rails is changed, so that the distance between the wheels can be adjusted in a self-adaptive mode by applying the technology of the invention, the situation that the movement is not smooth is completely avoided, and the situation that the wheels are blocked and cannot work is avoided.

Claims

1. Novel rail set that car washer used, characterized by: comprising the following steps: the car washer comprises a guide rail (2), a car washer rack (4) and wheels arranged at the lower part of the rack (4); the guide rail (2) and the wheels are embedded;

the car washer (1) is of a gantry structure with symmetrical left and right sides; each side is symmetrically provided with a walking motor (3), a transmission mechanism, a driving wheel mechanism and a driven wheel mechanism;

an output shaft of the walking motor (3) is in transmission connection with the driving wheel mechanism through a transmission mechanism;

the driving wheel mechanism comprises: a driving wheel (6), a driving wheel shaft (10), a first bearing seat assembly, a second bearing seat assembly and a driving wheel mounting frame (7); the driving wheel mounting frame (7) is fixedly connected with the frame (4); the first bearing seat assembly and the second bearing seat assembly are fixedly connected with a driving wheel mounting frame (7); the driving wheel axle (10) is provided with a shaft shoulder, namely, the middle section is thick and the two sides are thin; the middle section of the driving wheel shaft (10) is fixedly connected with the driving wheel (6); one side of the driving wheel shaft (10) is in sliding connection with the first bearing seat assembly; the other side of the first bearing assembly is connected with the second bearing assembly in a sliding way;

the driven wheel mechanism includes: a driven wheel (11), a driven wheel axle (13), a third bearing block assembly, a fourth bearing block assembly, and a driven wheel mounting frame (12); the driven wheel mounting frame (12) is fixedly connected with the frame (4); the third bearing seat assembly and the fourth bearing seat assembly are fixedly connected with the driven wheel mounting frame (12); the driven wheel axle (13) is provided with a shaft shoulder, namely, the middle section is thick and the two sides are thin; the middle section of the driven wheel shaft (13) is fixedly connected with the driven wheel (11); the driven wheel axle (13) is connected with the third bearing seat assembly in a sliding way on one side; the other side of the first bearing seat is connected with a fourth bearing seat component in a sliding way;

the bearing comprises a first bearing seat assembly, a second bearing seat assembly, a third bearing seat assembly and a fourth bearing seat assembly, wherein each bearing seat assembly comprises a bearing seat (9) and a bearing (8).

2. The track assembly for a new car washer according to claim 1, characterized by: the guide rail (2) and the wheels are embedded, and the guide rail is any one of the following four parts;

a. the periphery of the wheel is an inward triangle, and the upper side of the guide rail (2) is a convex triangle; the two triangles are matched and inlaid in shape;

b. the periphery of the wheel is a convex triangle, and the upper side of the guide rail (2) is a sunken triangle; the two triangles are matched and inlaid in shape;

c. the periphery of the wheel is in an inward-sinking platform shape, and the upper side of the guide rail (2) is in a convex platform shape; the two platform shapes are matched and embedded in shape;

d. the periphery of the wheel is in a convex platform shape, and the upper side of the guide rail (2) is in a sunken platform shape; the two platforms are matched and inlaid in shape.