Efficient sampling device for road detection

Abstract

The invention discloses an efficient sampling device for road detection, and relates to the technical field of road detection sampling. Comprising a vehicle body, wheels are arranged at the bottom of the vehicle body, a track is installed on the vehicle body, the track is of an L-shaped structure, the corner of the track is in smooth transition, a sampling mechanism is installed on the track, the sampling mechanism comprises a supporting frame, a wheel frame is detachably installed on the back of the supporting frame, moving wheels are installed on the wheel frame, and the moving wheels roll in the track. A sliding base is slidably connected into the supporting frame. By arranging the sampling mechanism, during use, a supporting frame can be adjusted in a track, the supporting frame is erected, the supporting frame is kept stable by treading a pedal, and downward drilling sampling is realized based on cooperation of a lifting driving motor and a sampler main body; after drilling is completed, the sample can be clamped out through the clamping clamps; and when not in use, the support frame can be adjusted to the other end of the track, so that the support frame is flatly placed in the vehicle body and is convenient to store.

Description

Technical Field

[0001] The invention relates to the technical field of highway detection sampling, and in particular to a high-efficiency sampling device for highway detection. Background Art

[0002] Traditional highway sampling methods usually rely on manual operations, which are not only inefficient, but also labor-intensive and have certain safety risks. With the development of technology, automated and mechanized sampling devices have gradually been introduced into the field of highway inspection, improving the efficiency and accuracy of sampling.

[0003] After searching, the application scheme of Chinese patent application number CN202310408142.0 discloses a road sampling device and sampling method for highway detection, including a sampling vehicle for road sampling, an integrated board with integrated parts installed on the upper surface of the rear floor of the sampling vehicle, a lifting and steering mechanism is arranged on the upper surface of the integrated board, a sampling mechanism is also arranged connected to the lifting and steering mechanism, and a cutting mechanism is arranged inside the sampling mechanism. The road sampling device and sampling method applied to highway detection, through the piston rod of the telescopic cylinder, pushes the adjusting rod up and down inside the action cavity, and the adjusting rod drives the slider to move up and down on the outer surface of the slider when moving up and down, and compresses the reset spring, so that the spiral rod threadedly sleeved inside the adjusting rod drives the cutting knife to rotate, so as to cut off the surrounding of the sample soil, and then the sample soil can be taken out when the sampling tube rotates in the opposite direction. The sampling device in the above-mentioned document has the following shortcomings: although it can meet the sampling needs, since the sampling mechanism is arranged on the outside of the sampling vehicle, the vertical movement stroke is long, the longitudinal dimension of the structure is large, and it is not easy to arrange; if the longitudinal dimension is reduced, the initial position of the sampling tube is required to be closer to the ground, which is easily affected by the terrain; therefore, there is still room for improvement. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an efficient sampling device for highway detection.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An efficient sampling device for highway inspection includes a vehicle body, a wheel is arranged at the bottom of the vehicle body, a track is installed on the vehicle body, the track is in an L-shaped structure, and the corner of the track has a smooth transition, and a sampling mechanism is installed on the track, and the sampling mechanism includes:

[0007] A support frame, a wheel frame is detachably mounted on the back of the support frame, a moving wheel is mounted on the wheel frame, the moving wheel rolls in the track, and a slide seat is slidably connected in the support frame;

[0008] A lifting drive motor, the lifting drive motor is installed on the support frame, the output end of the lifting drive motor is transmission-connected with a lifting drive screw, the lifting drive screw is rotatably installed in the support frame, and the lifting drive screw is connected to the inner wall of the slide seat through a thread;

[0009] The sampler body is installed on the slide, the output end of the sampler body is provided with a sampling head, the vehicle body is provided with a liquid supply device, and the output end of the liquid supply device is connected to the sampler body through a liquid supply pipe;

[0010] A pedal, a connecting column is arranged on the side wall of the end of the pedal close to the support frame, one end of the connecting column is fixed on the support frame; the pedal is arranged vertically to the sampling head;

[0011] A card seat, which is fixed on the top of the support frame;

[0012] The clamping clamp is detachably connected to the clamping seat, the clamping clamp is a U-shaped structure, and a limiting block is arranged on the clamping clamp, and the diameter of the limiting block is greater than the inner diameter of the clamping seat.

[0013] As a preferred embodiment of the present invention: a first fixing buckle is installed on the vehicle body, and the first fixing buckle is matched with the clamping clip.

[0014] As a preferred embodiment of the present invention: a second fixing buckle is installed on the vehicle body, and the shape of the second fixing buckle is matched with the connecting column.

[0015] As a preferred embodiment of the present invention: a buckle is fixed to an outer wall of one side of the support frame, a liquid suction bag is detachably clamped on the buckle, and a liquid suction tube is arranged at one end of the liquid suction bag.

[0016] As a preferred embodiment of the present invention: a cleaning mechanism is installed on the vehicle body, and the cleaning mechanism comprises:

[0017] An annular frame, the annular frame is installed in the vehicle body through a bracket, and an annular groove is provided on the annular frame;

[0018] A movable frame, on which a roller is rotatably mounted, and the roller rolls in an annular groove;

[0019] A mobile driving assembly, the mobile driving assembly is used to drive the mobile frame to move along the annular groove of the annular frame;

[0020] A first electric telescopic cylinder, the first electric telescopic cylinder is installed on the moving frame, and a brush plate is installed at the output end of the first electric telescopic cylinder;

[0021] The clamping assembly is used to clamp the sample.

[0022] As a preferred embodiment of the present invention: the mobile driving component includes:

[0023] A mobile driving motor, the mobile driving motor is installed on an outer wall of one side of the mobile frame;

[0024] The track is rotatably installed on the mobile frame through an axis, the output end of the mobile driving motor is connected to the shaft transmission of the gear, and the inner side of the annular frame is provided with convex teeth distributed along the circumference, and the gear is meshed with the convex teeth.

[0025] As a preferred embodiment of the present invention: one side of the annular frame is connected to the limiting frame by a connecting rod, the limiting frame is concentrically arranged with the annular frame, and the limiting frame has a corrugated structure close to the annular frame; a slide rail is fixed to one end of the movable frame, a movable seat is slidably connected in the slide rail, a ball head rod is fixed to one end of the movable seat, the ball head rod and the movable frame are connected by a spring, and based on the support of the spring, the ball head rod slides on the corrugated structural surface of the limiting frame; the first electric telescopic cylinder is fixed on the movable seat.

[0026] As a preferred embodiment of the present invention: the output end of the liquid supply device is connected to a cleaning nozzle, and one end of the cleaning nozzle extends to one side of the annular frame.

[0027] As a preferred embodiment of the present invention: the clamping assembly comprises:

[0028] A mounting seat, wherein a plurality of mounting seats are mounted on an outer wall of one side of the annular frame, and the plurality of mounting seats are arranged in a circumferential distribution;

[0029] The second electric telescopic cylinder is installed on the mounting seat, and an arc plate is installed at the output end of the second electric telescopic cylinder.

[0030] As a preferred embodiment of the present invention: a rubber wheel is rotatably mounted on the arc plate, a rubber wheel driving motor is mounted on one side of the arc plate, and an output end of the rubber wheel driving motor is drivingly connected to the shaft of the caster.

[0031] The beneficial effects of the present invention are:

[0032] 1. The present invention is provided with a sampling mechanism. When in use, the support frame can be adjusted within the track, the support frame can be erected, and the support frame can be kept stable by stepping on the pedal. Based on the cooperation of the lifting drive motor and the sampler body, downward drilling sampling can be achieved; after drilling, the sample can be clamped out with a clamp; when not in use, the support frame can be adjusted to the other end of the track so that it can be laid flat in the vehicle body for easy storage.

[0033] 2. The present invention is provided with a clamping clip, which can not only clamp the sample when sampling, but also be installed in the holder when not in use and used as a handle, so it is highly practical.

[0034] 3. The present invention provides a first fixing buckle, so that when the sampling mechanism is stored in the vehicle body, the clamping clip can be clamped and fixed by the first fixing buckle to ensure the stability of the storage state; and provides a second fixing buckle, so that when the sampling mechanism is stored in the vehicle body, the connecting column can be clamped and fixed by the second fixing buckle to further improve the stability of the storage state.

[0035] 4. The present invention provides a liquid suction bag and a liquid suction tube, which can facilitate the suction of residual accumulated fluid after sampling and facilitate filling and repair.

[0036] 5. The present invention provides a cleaning structure, which can clamp the sample in the middle of the annular frame through the clamping assembly. Based on the operation of the mobile driving assembly, the mobile frame is driven to move along the annular groove of the annular frame. During the process, the first electric telescopic cylinder controls the brush plate to clean the outside of the sample, thereby improving practicality.

[0037] 6. The present invention provides structures such as a limit frame, so that during the movement of the movable frame, based on the limit support of the limit frame on the ball head rod, the brush plate can move axially on the annular frame, thereby improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the structure of an efficient sampling device for highway detection proposed by the present invention;

[0039] Figure 2 A schematic diagram of the structure of a sampling mechanism, a cleaning mechanism and a liquid supply device of a high-efficiency sampling device for highway inspection proposed by the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of a cleaning mechanism of a high-efficiency sampling device for highway inspection proposed by the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of the ball head rod and the limit frame of a high-efficiency sampling device for highway inspection proposed by the present invention;

[0042] Figure 5 This is a schematic diagram of the structure of the track and sampling mechanism of an efficient sampling device for highway inspection proposed by the present invention;

[0043] Figure 6 A schematic diagram of the structure of a sampling mechanism of a high-efficiency sampling device for highway detection proposed by the present invention;

[0044] Figure 7 This is a schematic structural diagram of a high-efficiency sampling device for highway inspection proposed by the present invention, in which a clamping clip and a liquid suction bag are removed from a supporting frame.

[0045] In the figure: 1 body, 2 annular frame, 3 holding frame, 4 cleaning nozzle, 5 liquid supply device, 6 second fixing buckle, 7 liquid supply tube, 8 sampler body, 9 pedal, 10 sampling head, 11 wheel, 12 first fixing buckle, 13 limit frame, 14 second electric telescopic cylinder, 15 convex teeth, 16 rubber wheel drive motor, 17 mobile drive motor, 18 first electric telescopic cylinder, 19 mounting seat, 20 mobile frame, 21 roller, 22 ball head rod, 23 spring, 24 brush plate, 25 mobile seat, 26 slide rail, 27 gear, 28 track, 29 clamping clamp, 30 lifting drive motor, 31 lifting drive screw, 32 support frame, 33 limit block, 34 card seat, 35 card buckle, 36 suction bag, 37 suction tube, 38 mobile wheel. DETAILED DESCRIPTION

[0046] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] Embodiment 1:

[0049] An efficient sampling device for highway inspection, such as Figure 1-7 As shown, the vehicle body 1 includes a vehicle body 1, a wheel 11 is arranged at the bottom of the vehicle body 1, a track 28 is installed on the vehicle body 1, the track 28 is an L-shaped structure, and the corner of the track 28 has a smooth transition, and a sampling mechanism is installed on the track 28, and the sampling mechanism includes:

[0050] A support frame 32, a wheel frame is detachably mounted on the back of the support frame 32, a moving wheel 38 is mounted on the wheel frame, the moving wheel 38 rolls in the track 28, and a slide seat is slidably connected in the support frame 32;

[0051] A lifting drive motor 30, the lifting drive motor 30 is installed on a support frame 32, the output end of the lifting drive motor 30 is drivingly connected to a lifting drive screw 31, the lifting drive screw 31 is rotatably installed in the support frame 32, and the lifting drive screw 31 is connected to the inner wall of the slide seat through a thread;

[0052] The sampler body 8 is mounted on the slide, and a sampling head 10 is provided at the output end of the sampler body 8. A liquid supply device 5 is provided on the vehicle body 1, and the output end of the liquid supply device 5 is connected to the sampler body 8 through a liquid supply pipe 7. The sampler body 8, the liquid supply device 5 and the sampling head 10 can adopt the existing technology, which will not be described in detail here.

[0053] A pedal 9, a connecting column is provided on the side wall of the end of the pedal 9 close to the support frame 32, one end of the connecting column is fixed on the support frame 32; the pedal 9 is vertically arranged with the sampling head 10;

[0054] A card holder 34, the card holder 34 is fixed to the top of the support frame 32;

[0055] The clamping clip 29 is detachably connected to the clamping seat 34. The clamping clip 29 is a U-shaped structure. A limit block 33 is provided on the clamping clip 29. The diameter of the limit block 33 is larger than the inner diameter of the clamping seat 34.

[0056] By setting up the sampling mechanism, when in use, the support frame 32 can be adjusted in the track 28, the support frame 32 can be erected, and the support frame 32 can be kept stable by stepping on the pedal 9. Based on the cooperation of the lifting drive motor 30 and the sampler body 8, downward drilling sampling can be achieved; after drilling, the sample can be clamped out by the clamping clamp 29; when not in use, the support frame 32 can be adjusted to the other end of the track 28, so that it can be placed flat in the vehicle body 1 for easy storage;

[0057] In addition, since the clamping clip 29 is provided, it can not only clamp the sample when sampling, but also be installed in the holder 34 when not in use and used as a handle, which is very practical; wherein, the clamping clip 29 is provided with an inwardly recessed finger groove, and the clamping clip 29 should have a certain elastic deformation ability to facilitate force pressing, thereby facilitating the clamping of the sample.

[0058] In order to facilitate storage and fixation; Figure 1 , Figure 2 , Figure 5 As shown, a first fixing buckle 12 is installed on the vehicle body 1, and the first fixing buckle 12 is adapted to the clamping clip 29;

[0059] By providing the first fixing buckle 12 , when the sampling mechanism is stored in the vehicle body 1 , the first fixing buckle 12 can be used to clamp and fix the clamping clip 29 , thereby ensuring the stability of the storage state.

[0060] In order to improve the fixation effect; Figure 1 , Figure 2 , Figure 5 As shown, a second fixing buckle 6 is installed on the vehicle body 1, and the shape of the second fixing buckle 6 is adapted to the connecting column;

[0061] By providing the second fixing buckle 6 , when the sampling mechanism is stored in the vehicle body 1 , the second fixing buckle 6 can be used to clamp and fix the connecting column, thereby further improving the stability of the storage state.

[0062] To improve practicality; Figure 1As shown, a holding frame 3 is installed at the front end of the vehicle body 1; a buckle 35 is fixed to the outer wall of one side of the support frame 32, and a liquid suction capsule 36 is detachably clamped on the buckle 35, and a liquid suction tube 37 is provided at one end of the liquid suction capsule 36;

[0063] By providing the suction bag 36 and the suction tube 37, it is possible to easily suck out the accumulated fluid remaining after sampling, so as to facilitate filling and repair.

[0064] Embodiment 2:

[0065] An efficient sampling device for highway inspection, such as Figure 1-7 As shown, in order to facilitate the cleaning of the sample, this embodiment makes the following improvements on the basis of embodiment 1: a cleaning mechanism is installed on the vehicle body 1, and the cleaning mechanism includes:

[0066] The annular frame 2 is installed in the vehicle body 1 through a bracket, and an annular groove is provided on the annular frame 2;

[0067] A movable frame 20, on which a roller 21 is rotatably mounted, and the roller 21 rolls in an annular groove;

[0068] A mobile driving assembly, the mobile driving assembly is used to drive the mobile frame 20 to move along the annular groove of the annular frame 2;

[0069] A first electric telescopic cylinder 18, the first electric telescopic cylinder 18 is installed on the moving frame 20, and a brush plate 24 is installed at the output end of the first electric telescopic cylinder 18;

[0070] A clamping assembly, the clamping assembly is used to clamp the sample;

[0071] By setting up a cleaning structure, the sample can be clamped in the middle of the annular frame 2 through the clamping component. Based on the operation of the mobile driving component, the mobile frame 20 is driven to move along the annular groove of the annular frame 2. During the process, the first electric telescopic cylinder 18 controls the brush plate 24 to clean the outside of the sample, thereby improving practicality.

[0072] In order to facilitate the control of the movement of the mobile frame 20; Figure 3 , Figure 4 As shown, the mobile driving component includes:

[0073] A mobile driving motor 17, wherein the mobile driving motor 17 is installed on an outer wall of one side of the mobile frame 20;

[0074] Track 28 is rotatably mounted on the moving frame 20 through an axis. The output end of the moving drive motor 17 is connected to the shaft of the gear 27. The inner side of the annular frame 2 is provided with convex teeth 15 distributed along the circumference, and the gear 27 is meshed with the convex teeth 15.

[0075] To improve the cleaning effect; Figure 3, Figure 4 As shown, one side of the annular frame 2 is connected to the limit frame 13 through a connecting rod, the limit frame 13 is concentrically arranged with the annular frame 2, and the limit frame 13 is close to the annular frame 2 and has a corrugated structure; a slide rail 26 is fixed to one end of the movable frame 20, a movable seat 25 is slidably connected in the slide rail 26, a ball head rod 22 is fixed to one end of the movable seat 25, the ball head rod 22 and the movable frame 20 are connected by a spring 23, and based on the support of the spring 23, the ball head rod 22 slides on the corrugated structure surface of the limit frame 13; the first electric telescopic cylinder 18 is fixed on the movable seat 25;

[0076] By providing structures such as the limit frame 13, during the movement of the movable frame 20, based on the limit support of the limit frame 13 on the ball head rod 22, the brush plate 24 can move axially in the annular frame 2, thereby improving the cleaning effect.

[0077] To improve the cleaning effect; Figure 1 As shown, the output end of the liquid supply device 5 is connected to a cleaning nozzle 4, and one end of the cleaning nozzle 4 extends to one side of the annular frame 2;

[0078] By providing structures such as the cleaning nozzle 4, auxiliary flushing can be performed when the brush plate 24 cleans the sample to improve the cleaning effect; in addition, a collection box for collecting liquid or a discharge trough for discharging liquid can be provided under the annular frame 2.

[0079] In order to facilitate the fixation of samples; Figure 3 As shown, the clamping assembly includes:

[0080] A mounting seat 19, wherein a plurality of mounting seats 19 are mounted on an outer wall of one side of the annular frame 2, and the plurality of mounting seats 19 are arranged in a circumferential distribution;

[0081] The second electric telescopic cylinder 14 is mounted on the mounting seat 19 , and an arc plate is mounted on the output end of the second electric telescopic cylinder 14 .

[0082] To improve practicality; Figure 3 As shown, a rubber wheel is rotatably mounted on the arc plate, a rubber wheel driving motor 16 is mounted on one side of the arc plate, and an output end of the rubber wheel driving motor 16 is drivingly connected to the shaft of the caster.

[0083] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An efficient sampling device for highway detection, characterized in that: The vehicle comprises a vehicle body (1), wherein a wheel (11) is arranged at the bottom of the vehicle body (1), a track (28) is installed on the vehicle body (1), the track (28) is in an L-shaped structure, and the corner of the track (28) has a smooth transition, and a sampling mechanism is installed on the track (28), wherein the sampling mechanism comprises: A support frame (32), a wheel frame is detachably mounted on the back of the support frame (32), a moving wheel (38) is mounted on the wheel frame, the moving wheel (38) rolls in the track (28), and a slide seat is slidably connected in the support frame (32); A lifting drive motor (30), the lifting drive motor (30) is mounted on a support frame (32), the output end of the lifting drive motor (30) is drivingly connected to a lifting drive screw (31), the lifting drive screw (31) is rotatably mounted in the support frame (32), and the lifting drive screw (31) is connected to the inner wall of the slide seat through a thread; A sampler body (8), the sampler body (8) is mounted on the slide, a sampling head (10) is provided at the output end of the sampler body (8), a liquid supply device (5) is provided on the vehicle body (1), and the output end of the liquid supply device (5) is connected to the sampler body (8) through a liquid supply pipe (7); A pedal (9), wherein a connecting column is arranged on the side wall of the end of the pedal (9) close to the support frame (32), and one end of the connecting column is fixed to the support frame (32); the pedal (9) and the sampling head (10) are arranged vertically; A card seat (34), the card seat (34) is fixed on the top of the support frame (32); The clamping clamp (29) is detachably clamped on the clamping seat (34). The clamping clamp (29) is a U-shaped structure. A limit block (33) is arranged on the clamping clamp (29). The diameter of the limit block (33) is larger than the inner diameter of the clamping seat (34).

2. The high-efficiency sampling device for highway detection according to claim 1, characterized in that: A first fixing buckle (12) is installed on the vehicle body (1), and the first fixing buckle (12) is matched with the clamping clip (29).

3. The high-efficiency sampling device for highway detection according to claim 2, characterized in that: A second fixing buckle (6) is installed on the vehicle body (1), and the shape of the second fixing buckle (6) is compatible with the connecting column.

4. The high-efficiency sampling device for highway detection according to claim 1, characterized in that: A buckle (35) is fixed to the outer wall of one side of the support frame (32), a liquid suction bag (36) is detachably clamped on the buckle (35), and a liquid suction tube (37) is arranged at one end of the liquid suction bag (36).

5. The efficient sampling device for highway detection according to claim 1, characterized in that: The vehicle body (1) is provided with a cleaning mechanism, the cleaning mechanism comprising: An annular frame (2), the annular frame (2) is installed in the vehicle body (1) through a bracket, and an annular groove is provided on the annular frame (2); A movable frame (20), on which a roller (21) is rotatably mounted, and the roller (21) rolls in an annular groove; A mobile driving assembly, the mobile driving assembly is used to drive the mobile frame (20) to move along the annular groove of the annular frame (2); A first electric telescopic cylinder (18), the first electric telescopic cylinder (18) being mounted on a movable frame (20), and a brush plate (24) being mounted on an output end of the first electric telescopic cylinder (18); The clamping assembly is used to clamp the sample.

6. The high-efficiency sampling device for highway detection according to claim 5, characterized in that: The mobile driving component comprises: A mobile driving motor (17), wherein the mobile driving motor (17) is mounted on an outer wall of one side of the mobile frame (20); The track (28) is rotatably mounted on the moving frame (20) through an axis, the output end of the moving driving motor (17) is connected to the shaft of the gear (27) by transmission, the inner side of the annular frame (2) is provided with convex teeth (15) distributed along the circumference, and the gear (27) is meshed with the convex teeth (15).

7. The high-efficiency sampling device for highway detection according to claim 6, characterized in that: One side of the annular frame (2) is connected to a limiting frame (13) via a connecting rod. The limiting frame (13) and the annular frame (2) are arranged concentrically. The limiting frame (13) has a corrugated structure on one side close to the annular frame (2). A slide rail (26) is fixed to one end of the movable frame (20). A movable seat (25) is slidably connected in the slide rail (26). A ball head rod (22) is fixed to one end of the movable seat (25). The ball head rod (22) and the movable frame (20) are connected via a spring (23). Based on the support of the spring (23), the ball head rod (22) slides on the corrugated structure surface of the limiting frame (13). The first electric telescopic cylinder (18) is fixed on the movable seat (25).

8. The high-efficiency sampling device for highway detection according to claim 7, characterized in that: The output end of the liquid supply device (5) is connected to a cleaning nozzle (4), and one end of the cleaning nozzle (4) extends to one side of the annular frame (2).

9. The high-efficiency sampling device for highway detection according to claim 8, characterized in that: The clamping assembly comprises: A mounting seat (19), wherein a plurality of mounting seats (19) are mounted on an outer wall of one side of the annular frame (2), and the plurality of mounting seats (19) are arranged in a circumferential distribution; The second electric telescopic cylinder (14) is mounted on a mounting seat (19), and an arc plate is mounted on the output end of the second electric telescopic cylinder (14).

10. The efficient sampling device for highway detection according to claim 9, characterized in that: A rubber wheel is rotatably mounted on the arc plate, a rubber wheel driving motor (16) is mounted on one side of the arc plate, and an output end of the rubber wheel driving motor (16) is drivingly connected to the shaft of the caster.

Images