Gesture detection device for luggage tractor

Abstract

The utility model relates to the technical field of tractors, in particular to a luggage tractor posture detection device. Comprising an annular encoder system, a pin shaft, a connecting frame, a cushioning spring and a position detection vehicle machine assembly, the circular encoder system comprises a magnetic grid read head and an annular magnetic grid assembly, the magnetic grid read head is arranged on the connecting frame, the annular magnetic grid assembly is arranged at the shaft shoulder of the pin shaft, the cushioning spring is installed on the upper side of the annular magnetic grid assembly, and the position detection vehicle machine assembly is electrically connected with the circular encoder system. According to the utility model, low-cost detection of the position of the tractor is realized by arranging the ring-shaped encoder system at the hinged shaft of the tractor and the trailer and the hinged shaft of the trailers, the structure is simple, and the reliability is high; and the damage probability of the annular magnetic grid in the working process is greatly reduced by arranging the magnetic grid protection ring and the cushioning spring, the reliability of the annular encoder system in various vibration interferences is ensured, and the annular encoder system is simple in structure, easy to process and assemble and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a posture detection device for a luggage tractor. Background Art

[0002] Baggage tractors are a type of airport-specific equipment widely used at airports, mainly used for baggage transportation, including a tractor head and a baggage trailer, where the tractor head and the baggage trailer, and the baggage trailers are usually connected by pins. During use, the driver generally determines the position of the subsequent trailer by visual inspection or based on experience, which causes the driver to frequently observe the rearview mirror or be distracted during driving, which can easily cause safety hazards on the apron and affect the normal operation of the airport; existing assisted driving solutions usually use a technical solution that combines multiple sensors with external equipment for judgment, which is expensive and requires a large amount of engineering work. Some solutions also require the apron to be modified, affecting the normal operation of the apron.

[0003] Therefore, there is an urgent need to provide a luggage tractor posture detection device, which can detect the position of the luggage tractor with a simple and low-cost device compared to the prior art. Utility Model Content

[0004] In order to overcome the problems existing in the prior art, the utility model aims to provide a luggage tractor posture detection device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a luggage tractor posture detection device, comprising a circular encoder system, a pin shaft, and a connecting frame, wherein the pin shaft is provided with a square shaft section and a round shaft section, wherein the round shaft section is provided below the square shaft section, wherein the maximum diagonal distance of the square shaft section is smaller than the diameter of the round shaft section, and the square shaft section and the round shaft section naturally form a first shaft shoulder; wherein the connecting frame is provided with a pin hole, wherein the size and position of the pin hole match those of the round shaft section;

[0006] The circular encoder system includes a magnetic grating reader and an annular magnetic grating assembly. The magnetic grating reader is arranged on a connecting frame, and the annular magnetic grating assembly is arranged at the first shoulder at the bottom of the square shaft section of the pin shaft. After the pin shaft is inserted into the pin hole, the magnetic grating reader can correctly sense the annular magnetic grating signal.

[0007] It should be noted that the circular encoder system needs to be a model that can identify the direction of rotation.

[0008] The utility model is further configured as follows: the annular magnetic grid assembly includes an annular magnetic grid and a magnetic grid protection ring, the magnetic grid protection ring includes a bottom ring and a retaining ring, the bottom ring is provided with a square hole, the square hole is a through hole whose geometric center axis coincides with the axis of the outer circle of the bottom ring, and the size of the square hole of the bottom ring matches the square shaft section; a mounting section is provided in the middle of the outer circle of the bottom ring, and the diameter and width of the mounting section are the same as the inner diameter of the annular magnetic grid; a protruding section is provided on one side of the mounting section, and the diameter of the protruding section is larger than the outer diameter of the annular magnetic grid; a threaded section is provided on the other side of the mounting section, and the diameter of the threaded section is smaller than the mounting section, and a second shaft shoulder is naturally formed with the mounting section;

[0009] The width of the retaining ring is the same as the width of the threaded section, and the outer diameter of the retaining ring is larger than the outer diameter of the annular magnetic grid; the retaining ring is provided with a threaded through hole, which is coaxial with the outer diameter of the retaining ring and has a size that matches the threaded section; the annular magnetic grid is installed on the mounting section of the bottom ring, and the retaining ring is fixed to the threaded section of the bottom ring by threads, and one end face of the bottom ring is in contact with the second shaft shoulder.

[0010] The utility model is further configured as follows: the luggage tractor position detection device also includes a fixing frame, the fixing frame is arranged at the rear end of the tractor head, the connecting frame and the fixing frame are respectively arranged at the front and rear ends of the trailer, and the fixing frame is provided with a square hole matching with the square shaft section.

[0011] The utility model is further configured as follows: the luggage tractor position detection device also includes a damping spring and a first plane, the first plane is arranged at the bottom of the fixing frame, the square shaft segment vertically passes through the first plane and cooperates with the fixing frame, the size of the first plane is larger than the damping spring, and the damping spring is installed between the first plane and the annular magnetic grid assembly.

[0012] The utility model is further configured as follows: the inner diameter of the shock absorbing spring is the same as the maximum diagonal distance of the square shaft segment, the outer diameter of the shock absorbing spring is smaller than the maximum outer diameter of the magnetic grating protection ring; the normal state length of the shock absorbing spring is set to 110% of the minimum distance from the magnetic grating protection ring to the first plane.

[0013] The utility model is further configured as follows: the luggage tractor position detection device also includes a baffle, a groove matching with the baffle is arranged above the square shaft section, and the baffle is connected to the top of the fixing frame by bolts.

[0014] The utility model is further configured as follows: the luggage tractor position detection device also includes a position detection vehicle assembly, the position detection vehicle assembly includes a data processing unit and a display device, the position detection vehicle data processing unit is arranged in the tractor head, and the display device is arranged in the cab; the position detection vehicle assembly is electrically connected to the circular encoder system.

[0015] In summary, the beneficial effects of the above technical solution of the utility model are as follows:

[0016] (1) The utility model realizes low-cost detection of the position of the tractor by setting a circular encoder system at the hinge shafts between the tractor and the trailer, and between the trailers, and has a simple structure and high reliability.

[0017] (2) The utility model greatly reduces the probability of damage to the annular magnetic grating during operation by providing a magnetic grating protection ring and a shock-absorbing spring, thereby ensuring the reliability of the circular encoder system in various vibration interferences. The utility model has a simple structure, is easy to process and assemble, and has a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a partial schematic diagram of the position detection device of the utility model.

[0020] Figure 2 It is a partial top view schematic diagram of the position detection device of the utility model.

[0021] Figure 3 It is a partially enlarged cross-sectional schematic diagram of the detection device of the utility model.

[0022] Figure 4 This is a schematic diagram of the operation of the traction vehicle group of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Magnetic grating reader; 2. Ring-shaped magnetic grating; 3. Pin shaft; 3.1. Round shaft section; 3.2. Square shaft section; 4. Connecting frame; 5. Shock-absorbing spring; 6. Retaining ring; 7. Bottom ring; 7.1. Mounting section; 7.2. Protruding section; 7.3. Threaded section; 8. Fixing frame; 8.1. First plane; 9. Baffle; 10. Tractor head; 11. Trailer; 12.1. Data processing unit; 12.2. Display device. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following is a clear and complete description of the technical solution of the present invention in conjunction with the drawings of the present invention. Based on the embodiments of the present invention, other similar embodiments obtained by ordinary technicians in the field without creative work should all fall within the scope of protection of the present invention. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the creation of the present invention.

[0026] The utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0027] Embodiment 1:

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it is a preferred embodiment of the utility model, a luggage tractor posture detection device, comprising a circular encoder system, a pin shaft 3, and a connecting frame 4, wherein the pin shaft 3 is provided with a square shaft section 3.2 and a round shaft section 3.1, wherein the round shaft section 3.1 is arranged below the square shaft section 3.2, wherein the maximum diagonal distance of the square shaft section 3.2 is smaller than the diameter of the round shaft section 3.1, and the square shaft section 3.2 and the round shaft section 3.1 naturally form a first shaft shoulder; the connecting frame 4 is provided with a pin hole, wherein the size and position of the pin hole match the round shaft section 3.1;

[0029] The circular encoder system includes a magnetic grating reader 1 and an annular magnetic grating assembly. The magnetic grating reader 1 is arranged on a connecting frame 4, and the annular magnetic grating assembly is arranged at the first shoulder at the bottom of the square shaft section 3.2 of the pin shaft. After the pin shaft is inserted into the pin hole, the magnetic grating reader 1 can correctly sense the signal of the annular magnetic grating 2.

[0030] It should be noted that the circular encoder system needs to be a model that can identify the direction of rotation.

[0031] The utility model is further configured as follows: the annular magnetic grid assembly includes an annular magnetic grid 2 and a magnetic grid protection ring, the magnetic grid protection ring includes a bottom ring 7 and a retaining ring 6, the bottom ring 7 is provided with a square hole, the square hole is a through hole whose geometric center axis coincides with the axis of the outer circle of the bottom ring 7, and the size of the square hole of the bottom ring 7 matches the square shaft section 3.2; a mounting section 7.1 is provided in the middle of the outer circle of the bottom ring 7, and the diameter and width of the mounting section 7.1 are the same as the inner diameter of the annular magnetic grid 2; a protruding section 7.2 is provided on one side of the mounting section 7.1, and the diameter of the protruding section 7.2 is larger than the outer diameter of the annular magnetic grid 2; a threaded section 7.3 is provided on the other side of the mounting section 7.1, and the threaded section 7.3 has a diameter smaller than the mounting section 7.1, and naturally forms a second shaft shoulder with the mounting section 7.1;

[0032] The width of the retaining ring 6 is the same as that of the threaded section 7.3, and the outer diameter of the retaining ring 6 is larger than the outer diameter of the annular magnetic grid 2; the retaining ring 6 is provided with a threaded through hole, which is coaxial with the outer diameter of the retaining ring 6 and has a size that matches the threaded section 7.3; the annular magnetic grid 2 is installed on the mounting section 7.1 of the bottom ring 7, and the retaining ring 6 is fixed to the threaded section 7.3 of the bottom ring 7 by threads, and one end face of the bottom ring 7 is in contact with the second shaft shoulder.

[0033] The utility model is further configured as follows: the luggage tractor position detection device also includes a fixing frame 8, which is arranged at the rear end of the tractor head 10, and the connecting frame 4 and the fixing frame 8 are respectively arranged at the front and rear ends of the trailer 11, and the fixing frame 8 is provided with a square hole that matches the square shaft section 3.2.

[0034] The utility model is further configured as follows: the luggage tractor position detection device also includes a damping spring 5 and a first plane 8.1, the first plane 8.1 is arranged at the bottom of the fixing frame 8, the square shaft section 3.2 vertically passes through the first plane 8.1 and cooperates with the fixing frame 8, the first plane 8.1 is larger than the damping spring 5, and the damping spring 5 is installed between the first plane 8.1 and the annular magnetic grid assembly.

[0035] The utility model is further configured as follows: the inner diameter of the damping spring 5 is the same as the maximum diagonal distance of the square shaft section 3.2, and the outer diameter of the damping spring 5 is smaller than the maximum outer diameter of the magnetic grating protection ring; the normal length of the damping spring 5 is set to 110% of the minimum distance from the magnetic grating protection ring to the first plane 8.1.

[0036] The utility model is further configured as follows: the luggage tractor position detection device further comprises a baffle plate 9, a groove matching with the baffle plate 9 is arranged above the square shaft section 3.2, and the baffle plate 9 is connected to the top of the fixing frame 8 by bolts.

[0037] The utility model is further configured as follows: the luggage tractor position detection device also includes a position detection vehicle assembly, the position detection vehicle assembly includes a data processing unit 12.1 and a display device 12.2, the position detection vehicle data processing unit is arranged in the tractor head 10, and the display device 12.2 is arranged in the cab; the position detection vehicle assembly is electrically connected to the circular encoder system.

[0038] During the installation of the tractor position detection device, if Figure 1 , Figure 2 , Figure 3As shown, the annular magnetic grating 2 is first installed on the installation section 7.1 of the bottom ring 7, and then the retaining ring 6 is installed on the threaded section 7.3 of the bottom ring 7 through threads to form a magnetic grating protection ring; the magnetic grating protection ring is installed in the middle of the square shaft section 3.2 of the pin 3 through the square hole of the bottom ring 7, and then the damping spring 5 is installed into the square shaft section 3.2, so that the damping spring 5 contacts the end surface of the magnetic grating protection ring; finally, the square shaft section 3.2 of the pin 3 is installed on the trailer 11 through the first plane 8.1, the baffle 9 is inserted into the groove of the pin 3, and then the baffle 9 is connected to the fixing frame 8 by bolts.

[0039] After the pin shaft 3 is inserted into the pin hole of the connecting frame 4, the magnetic grating protection ring is slightly lifted away from the first shaft shoulder, and the shock absorbing spring 5 is slightly compressed. At this time, if the pin shaft 3 moves upward relative to the connecting frame 4, the magnetic grating protection ring remains tightly attached to the top of the connecting frame 4 under the action of the shock absorbing spring; if the pin shaft 3 moves downward relative to the connecting frame 4, the magnetic grating protection ring compresses the shock absorbing spring 5 under the action of the connecting frame 4 and the first contact surface 8, and still remains tightly attached to the top of the connecting frame 4 unchanged, and part of the impact force generated during the up and down vibration of the pin shaft 3 and the connecting frame 4 can be absorbed by the shock absorbing spring 5.

[0040] Through the above structure, the vertical position of the annular magnetic grid in the magnetic grid protection ring relative to the connecting frame 4 remains unchanged; and the magnetic grid reader 1 is installed on the connecting frame 4 to correctly sense the position of the annular magnetic grid 2, so the vertical positions of the annular magnetic grid 2 and the magnetic grid reader 1 remain unchanged relatively, so this structure can ensure that the circular encoder system works stably during vibration.

[0041] During the operation of the tractor position detection device, if Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a set of position detection devices is provided at each connection of the tractor group. When the driver of the tractor 10 turns, the relative angle between the tractor 10 and the subsequent trailer 11 changes, and the circular encoder system reads the angle signal and transmits it to the data processing unit 12.1; since the lengths of the tractor 10 and the trailer 11 are known, the data processing unit 12.1 can easily calculate the coordinates of the subsequent trailer connection point P by the following formula, thereby obtaining the specific position of each trailer of the tractor group;

[0042] like Figure 4 As shown, in this embodiment, P0 is taken as the origin, the rear of the tractor head 10 is the positive direction of the x-axis, and the right side facing the tractor head 11 is the positive direction of the y-axis, and it can be obtained that:

[0043] P0=(0,0);

[0044] P1=[(±|cosθ1L1|), (±|sinθ1L1|)]=(x1,y1);

[0045] P2=(x1±|cosθ2L2|), (y1±|sinθ2L2|)=(x2,y2);

[0046] ………………

[0047] P n =(x n-1 ±|cosθ n L n |),(y n-1 ±|sinθ n L n |)=(x n ,y n ).

[0048] Where P n Represents the coordinates of the center point of the pin in the connection state, θ n Represents the angle between the two trailers, L n Represents P n To P n-1 The distance between n ,y n Represents P n Point abscissa and ordinate.

[0049] It should be noted that the circular encoder system uses a model that can identify the rotation direction, and the ± signs in the above formula should be determined according to the rotation direction data of the circular encoder system.

[0050] After the data processing unit 12.1 calculates the endpoint data of each trailer 11 by the above method, the display device displays the position of the tractor in an image format for the driver's reference.

[0051] In summary, the utility model provides a luggage tractor posture detection device, which can improve the problem in the prior art that the tractor driver cannot accurately judge the position of the subsequent trailer 11, and the existing auxiliary devices are expensive and require a large amount of engineering work, and some also require the apron to be modified, affecting the normal operation of the apron.

[0052] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A baggage tractor posture detection device, characterized in that: The luggage tractor posture detection device comprises a circular encoder system, a pin shaft, and a connecting frame. The pin shaft is provided with a square shaft section and a round shaft section. The round shaft section is arranged below the square shaft section. The maximum diagonal distance of the square shaft section is smaller than the diameter of the round shaft section. The square shaft section and the round shaft section naturally form a first shaft shoulder. The connecting frame is provided with a pin hole. The size and position of the pin hole match the round shaft section. The circular encoder system includes a magnetic grating reader and an annular magnetic grating assembly. The magnetic grating reader is arranged on a connecting frame, and the annular magnetic grating assembly is arranged at the first shoulder at the bottom of the square shaft section of the pin shaft. After the pin shaft is inserted into the pin hole, the magnetic grating reader can correctly sense the annular magnetic grating signal.

2. A luggage tractor posture detection device according to claim 1, characterized in that: The annular magnetic grid assembly includes an annular magnetic grid and a magnetic grid protection ring, the magnetic grid protection ring includes a bottom ring and a retaining ring, the bottom ring is provided with a square hole, the square hole is a through hole whose geometric center axis coincides with the axis of the outer circle of the bottom ring, and the size of the square hole of the bottom ring matches the square shaft section; a mounting section is provided in the middle of the outer circle of the bottom ring, and the diameter and width of the mounting section are the same as the inner diameter of the annular magnetic grid; a protruding section is provided on one side of the mounting section, and the diameter of the protruding section is larger than the outer diameter of the annular magnetic grid; a threaded section is provided on the other side of the mounting section, and the diameter of the threaded section is smaller than the mounting section, and a second shaft shoulder is naturally formed with the mounting section; The width of the retaining ring is the same as the width of the threaded section, and the outer diameter of the retaining ring is larger than the outer diameter of the annular magnetic grid; the retaining ring is provided with a threaded through hole, which is coaxial with the outer diameter of the retaining ring and has a size that matches the threaded section; the annular magnetic grid is installed on the mounting section of the bottom ring, and the retaining ring is fixed to the threaded section of the bottom ring by threads, and one end face of the bottom ring is in contact with the second shaft shoulder.

3. A luggage tractor posture detection device according to claim 2, characterized in that: The luggage tractor posture detection device also includes a fixing frame, which is arranged at the rear end of the tractor head, and the connecting frame and the fixing frame are respectively arranged at the front and rear ends of the trailer, and the fixing frame is provided with a square hole that matches the square shaft section.

4. A luggage tractor posture detection device according to claim 3, characterized in that: The luggage tractor posture detection device also includes a shock-absorbing spring and a first plane, wherein the first plane is arranged at the bottom of the fixing frame, the square shaft segment vertically passes through the first plane and cooperates with the fixing frame, the first plane is larger than the shock-absorbing spring, and the shock-absorbing spring is installed between the first plane and the annular magnetic grid assembly.

5. A luggage tractor posture detection device according to claim 4, characterized in that: The inner diameter of the damping spring is the same as the maximum diagonal distance of the square shaft segment, and the outer diameter of the damping spring is smaller than the maximum outer diameter of the magnetic grating protection ring; the normal length of the damping spring is set to 110% of the minimum distance from the magnetic grating protection ring to the first plane.

6. A luggage tractor posture detection device according to claim 5, characterized in that: The luggage tractor posture detection device further comprises a baffle, a groove matching with the baffle is arranged above the square shaft section, and the baffle is connected to the top of the fixing frame by bolts.

7. A luggage tractor posture detection device according to claim 6, characterized in that: The luggage tractor posture detection device also includes a position detection vehicle machine assembly, which includes a data processing unit and a display device. The position detection vehicle machine data processing unit is arranged in the tractor head, and the display device is arranged in the cab; the position detection vehicle machine assembly is electrically connected to the circular encoder system.

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