Automatic lock

Abstract

An automatic lock belongs to the field of transportation tools and is suitable for locking and unlocking of fixed connection of a freight box and a framework vehicle. The automatic lock is mounted between a freight box and a framework vehicle and comprises a driving device, a mounting device, a lifting device, a swinging device and a locking device, the driving device is mounted on the framework vehicle, is positioned in a framework vehicle cross beam, is connected with the framework vehicle through the mounting device and is connected with the power source; the power source is divided into a power supply, a pneumatic system, an electric control system or a hydraulic system according to different types of driving devices; the driving device can drive the lifting device and drive the locking device to move so that the locking device can enter or exit from a lock box on a freight box. The device has the characteristics of high automation degree and compact structure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of transport tools, and particularly relates to an automatic lock for locking and unlocking a freight box and a skeleton vehicle during a transport operation using the freight box. BACKGROUND

[0002] The freight box, also known as a container, is a commonly used transport tool in the field of freight transportation, and has the advantages of high loading and unloading efficiency, no scattering, and easy lifting, and is widely used. With the progress of technology, the use of freight boxes for transportation has been more widely applied, such as the setting of smart ports and smart stations, which basically use unmanned operation modes, and therefore, the use of freight boxes has more advantages. In the application, it is found that the locking and unlocking of the existing freight box and the skeleton vehicle is mostly performed manually, which not only has low efficiency and high labor intensity, but also more seriously, when unmanned vehicles are used for transportation, problems may occur due to locking and unlocking, and personnel need to be additionally arranged, which reduces work efficiency and does not match the intelligence and automation. SUMMARY

[0003] The present application provides an automatic lock which can realize the automatic locking and unlocking between the skeleton car and the freight container, and the specific technical scheme is as follows: an automatic lock characterized in that: the automatic lock is suitable for the locking and unlocking of the fixed connection between the freight container and the skeleton car; the automatic lock is installed between the freight container and the skeleton car and comprises a driving device, a mounting device, a lifting device, a swinging device and a locking device; the driving device is installed on the skeleton car and located inside the frame cross beam (so as to reduce the space occupation, hide and be compact), connected with the skeleton car through the mounting device and connected with a power source; the power source is divided into an electric power source, a pneumatic system, an electric control system or a hydraulic system according to the type of the driving device; the driving device can drive the lifting device and drive the locking device to move so as to realize the entering or exiting of the locking device into or out of the lock box on the freight container; the driving device can also drive the swinging device and drive the lock head on the locking device to swing so as to realize the locking and unlocking of the lock head on the lock box on the freight container; the mounting device is installed inside the frame cross beam and connected with the frame cross beam, and can support and install the driving device, the lifting device and the swinging device; the lifting device is installed on the mounting device and connected with the mounting device, the driving device and the front and rear side walls of the frame cross beam; and the lifting device is connected with the locking device and can drive the moving part of the locking device to move up and down; the swinging device is installed on the mounting device and connected with the mounting device, and connected with the driving device and the swinging part of the locking device; the locking device is installed inside the frame cross beam and connected with the frame cross beam, and comprises a fixed lock sleeve and a movable lock head, and is connected with the lifting device and the swinging device, and can realize the up and down movement and the swinging around the own axis of the movable lock head under the driving of the lifting device and the swinging device.

[0004] Further, the driving device is a pneumatic cylinder or a hydraulic cylinder or an electric push rod or a servo motor.

[0005] Further, the pneumatic cylinder comprises a cylinder body, a cylinder connecting frame, a piston rod head and pneumatic accessories.

[0006] Further, the mounting device comprises a mounting plate and fasteners; the mounting plate is installed inside the frame cross beam and connected with the frame cross beam through the fasteners; the fasteners are installed between the mounting plate and the frame cross beam and can fix the mounting plate on the frame cross beam; and the fasteners are screws or bolts.

[0007] Further, the mounting plate is provided with a guide groove, a supporting wheel track installation hole and a driving device installation hole.

[0008] Further, the lifting device comprises a swing shaft, an upper swing arm, a supporting wheel, a supporting wheel shaft and a supporting wheel track; the swing shaft is installed on the two side walls of the frame crossbeam or the mounting frame of the mounting device and is connected with the frame crossbeam or the mounting device; the upper swing arm is installed on the swing shaft, is sleeved with the swing shaft at one end and can swing around the swing shaft or together with the swing shaft on the frame crossbeam or the mounting device, and the other end extends into the locking device and is in contact with the movable sleeve of the locking device to drive the movable sleeve to move upward; the supporting wheel is installed on the supporting wheel shaft and can rotate around the supporting wheel shaft or together with the supporting wheel shaft; the supporting wheel shaft is installed on the power output element of the driving device and is connected with the power output element, and the two ends are connected with the two supporting wheels; the supporting wheel shaft can rotate on the power output element or the two supporting wheels can rotate on the supporting wheel shaft, or both of the above relative rotations exist; the supporting wheel track is installed above the mounting plate of the mounting device and is fixedly connected with the mounting plate; the number of the supporting wheel tracks matches the number of the supporting wheels, the thickness of the supporting wheel track matches the width of the outer circumferential groove of the supporting wheel, and the installation direction of the supporting wheel track is consistent with the movement direction of the supporting wheel.

[0009] Further, the upper swing arm has two parallel installations.

[0010] Further, the lower edge of the upper swing arm in contact with the supporting wheel is wedge-shaped, that is, when the supporting wheel moves horizontally and linearly, the upper swing arm can be driven to swing around the swing shaft.

[0011] Further, the supporting wheel has two corresponding upper swing arms.

[0012] Further, the outer circumference of the supporting wheel has a groove, and the width of the groove is greater than or equal to the thickness of the upper swing arm and the supporting wheel track.

[0013] Further, the swing device comprises a pushing block, a pushing arm, a limiting device, a return pin, a lower swing rod, a return spring and a spring seat; the pushing block is installed on the driving device and is connected with the driving device and located in the guide groove of the mounting plate, the lower end of the pushing block is connected with the pushing arm and can drive the pushing arm to move together; the pushing arm is installed on the pushing block and is connected with the pushing block, one end is connected with the pushing block, and the other end is provided with the return pin; the limiting device is installed on the mounting plate or the frame crossbeam and is connected with the mounting plate or the frame; the return pin is installed on one end of the pushing arm, and the end is located adjacent to the lower swing rod; the lower swing rod is installed on the lower end of the locking device and is separately connected with the movable lock head of the locking device and can drive the movable lock head to rotate in the locking device; the return spring is installed between one end of the lower swing rod and the spring seat and is a tensile spring, which can drive the lower swing rod to swing when there is no obstruction or reverse external force; the spring seat is installed on the mounting plate or the frame crossbeam and can hang the return spring.

[0014] Further, the position limiting device is connected with the mounting plate or the cross beam of the frame, and the connection position can be adjusted to facilitate adjustment of the relative position of the position limiting device and the swing rod.

[0015] Further, the position limiting device has two levels of position limiting, the low level of position limiting limits the swing height of the swing rod, and the swing rod can swing above the low level of position limiting; the high level of position limiting limits the end position of the swing range of the swing rod.

[0016] Further, the connection position of the return pin and the push arm can be adjusted to adapt to the position change of the swing rod when the swing rod is lifted and lowered by the locking device.

[0017] Further, the length of one end of the swing rod is adapted to the installation position of the position limiting device, and the other end is hung with a return spring.

[0018] Further, the locking device comprises a spring lower seat, a compression spring, a fixed guide sleeve, a sliding ring, a movable sliding sleeve and a movable lock head; the spring lower seat is arranged at the bottom of the movable sliding sleeve and connected with the movable sliding sleeve; the outer diameter of the spring lower seat is larger than the bottom diameter of the movable sliding sleeve; the compression spring is installed on the spring lower seat and sleeved on the lower outer periphery of the movable sliding sleeve; the compression spring is a spiral compression spring; the fixed guide sleeve is installed inside the cross beam of the frame and fixedly connected with the inner side of the upper wall of the cross beam, and the middle sliding block hole of the fixed guide sleeve corresponds to the position of the lock hole of the freight box lock box arranged on the upper wall of the cross beam; the middle of the fixed guide sleeve is provided with a sliding block hole, which is a special-shaped hole, a polygonal hole or a circular hole with a guide element such as a key or a spline; the cross-sectional shape and size of the sliding block hole match those of the part of the movable sliding sleeve located in the sliding block hole of the fixed guide; the sliding ring is installed on the movable sliding sleeve and located at the lower part of the movable sliding sleeve and above the compression spring; the sliding ring can slide on the movable sliding sleeve; the movable lock head is installed in the movable sliding sleeve and can rotate in the movable sliding sleeve; the bottom of the movable sliding sleeve is connected with the swing rod of the swing device; the top of the movable lock head is provided with a tapered lock head, and the lower part of the lock head is a cross section in the shape of a rectangle, when the movable lock head rotates, the bottom of the tapered lock head on the movable lock head will lap on the long hole on the bottom of the freight box bottom lock box and will not fall off, when the tapered lock head is rotated to the bottom surface consistent with the cross-sectional direction geometric shape of the sliding block hole on the fixed guide sleeve, the tapered lock head can be taken out from the lock hole of the freight box bottom lock box together with the movable lock head.

[0019] Further, the cross-sectional shape of the sliding block hole on the fixed guide sleeve is a long circular hole composed of two straight sides and two circular arc sides.

[0020] Further, the upper part of the movable sliding sleeve has a cross-sectional shape matching that of the sliding block hole of the fixed guide sleeve.

[0021] Further, the compression and effective extension stroke of the compression spring is greater than or equal to the movement stroke of the movable lock sleeve.

[0022] Advantages

[0023] The application has the advantages that the lock block can be automatically opened and closed when the freight container is loaded and unloaded on the skeleton vehicle, which provides favorable conditions for intelligent wharf and station yard, reduces the labor intensity of the operator, and improves the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the structure schematic diagram of the freight container placed on the skeleton vehicle frame

[0025] Figure 2 is the structure schematic diagram of the automatic lock installed on the skeleton vehicle frame beam

[0026] Figure 3 is the structure schematic diagram of the automatic lock installed on the inside of the beam after removing one side of the beam

[0027] Figure 4 is the structure schematic diagram of one embodiment of the automatic lock in the original state

[0028] Figure 5 is the structure schematic diagram of the other side of Figure 4

[0029] Figure 6 is the structure schematic diagram of the side view of Figure 4

[0030] Figure 7 is the structure schematic diagram of the movable lock head rising to the high point and rotating

[0031] Figure 8 is the structure schematic diagram of the inside of Figure 7 after removing the fixed guide sleeve

[0032] Figure 9 is the structure schematic diagram of the inside of Figure 7 after further removing the movable sliding sleeve

[0033] Figure 10 is the structure schematic diagram of one embodiment of the fixed guide sleeve

[0034] ​​A. frame of skeleton vehicle, B. freight box, C. automatic lock, A1. frame longitudinal beam, A2. frame cross beam, A21. upper wall of cross beam, A22. left wall of cross beam, A23. lower wall of cross beam, A24. right arm of cross beam, 1. driving device, 2. mounting device, 3. lifting device, 4. swinging device, 5. locking device, 6. mounting mandrel, 11. piston rod, 31. swinging shaft, 32. upper swinging arm, 33. supporting wheel, 34. track of supporting wheel, 41. pushing block, 42. pushing arm, 43. limiting device, 44. return pin, 45. lower swinging rod, 46. return spring, 47. spring seat, 51. lower spring seat, 52. compression spring, 53. fixed guide sleeve, 54. sliding ring, 55. movable sliding sleeve, 56. movable lock head, 531. sleeve body, 532. sliding block hole, 533. swinging arm movement hole. DETAILED DESCRIPTION

[0035] In order to better illustrate the technical solutions of the present application, the specific embodiments and working principles of the present application will be further described in combination with the drawings, such as Figures 1-10 In this example, the frame of skeleton vehicle and the freight box commonly used in the industry are selected as the frame of skeleton vehicle A and the freight box B of this example, the fixed guide sleeve 53 is selected to include the sleeve body 531, the sliding block hole 532 and the swinging arm movement hole 533, the sliding block hole 531 is designed to have a shape matching the shape of the lock hole on the lock box at the bottom of the freight box B as the cross-sectional shape of the sliding block hole 532, so that it can be easily matched with the freight box B and improve the adaptability of the device; and the number of the swinging arm movement hole 533 is matched with the number of the upper swinging arm 32, the length is matched with the total stroke of the upper swinging arm 32, and the width is matched with the thickness of the upper swinging arm 32, so as to form the fixed guide sleeve 53 of this example; the upper end face of the fixed guide sleeve 53 is provided with a threaded hole, and the cross beam upper wall A21 of the frame cross beam A2 is provided with a counterbore capable of accommodating the head of the screw, which is matched with the threaded hole, and the fixed guide sleeve 53 and the frame cross beam A2 are fixedly connected by screws, in order to ensure the accuracy of the fixed position, a positioning pin can be arranged near the screw to ensure that the installation position of the fixed guide sleeve 53 is stable and unchanged. In this way, the implementation of the fixed guide sleeve 53 is completed.

[0036] In this example, the locking device 5 includes a lower spring seat 51, a compression spring 52, a fixed guide sleeve 53, a slip ring 54, a movable sliding sleeve 55, and a movable lock head 56. The lower spring seat 51 is an annular structure, located at the bottom of the movable sliding sleeve 55 and connected to it. The outer diameter of the lower spring seat 51 is greater than or equal to the diameter of the compression spring 52. A commonly used helical compression spring is used as the compression spring 52. The compression spring 52 is installed on the lower spring seat 51 and fitted onto the lower outer circumference of the movable sliding sleeve 55. The fixed guide sleeve 53 is installed inside the frame crossbeam A2 and fixedly connected to the upper wall A21 of the crossbeam. The slider hole 532 of the fixed guide sleeve 53 is aligned with the cargo handling equipment on the upper wall A21 of the crossbeam. The lock hole positions on the lock box correspond; in this example, an annular sliding sleeve is selected as the sliding ring 54, and the sliding ring 54 is installed on the movable sliding sleeve 55, located at the lower part of the movable sliding sleeve 55 and above the compression spring 52; ensuring that the sliding ring 53 can slide on the movable sliding sleeve 55; a lock head with the same shape and size as the lock head commonly used in this industry is selected as the conical lock head at the top of the movable lock head 56 in this example, and a cylindrical tail is set at the lower part of the conical lock head as the movable lock head 56. The movable lock head 56 is fitted into the movable sliding sleeve 55, can rotate within the movable sliding sleeve 55, and can move up and down with the movable sliding sleeve 55; and the bottom of the movable lock head 56 is connected to the lower swing rod 45 of the swing device 4; thus, the locking device 5 is implemented.

[0037] In this example, the swing device 4 includes a push block 41, a push arm 42, a limiting device 43, a return pin 44, a lower swing rod 45, a return spring 46, and a spring seat 47. In this example, a commonly used connecting block is selected as the push block 41. The push block 41 is mounted on the drive device 1, connected to the drive device 1, and located in the guide groove of the mounting plate of the mounting device 2, allowing it to slide along the guide groove. The lower end of the push block 41 is connected to the push arm 42, enabling the push arm 42 to move together with the push block 41. In this example, an irregularly shaped plate-like body is selected as the push arm 42, which can adapt to the overall structure and the internal structure of the frame crossbeam A2. The push arm 42 is mounted on the push block 31, connecting the push block 31 with the push arm 42. Connection 41, one end connected to push block 41, the other end equipped with return pin 44; in this example, a quasi-L-shaped structure is selected as the limiting device 43, which is installed on the mounting plate or frame crossbeam A2 and connected to the mounting plate or frame crossbeam A2. The main consideration is to determine where it is most convenient to install to achieve its function and ease of use; the main structure of the limiting device 43 consists of a short column and a long column, a connecting part connecting the lower ends of the two columns, and a mounting part at the upper end of the long column; the function of the short column is to limit the starting swing height of the lower swing arm 45, thus avoiding interference between the upward movement and the swinging movement of the locking device 5; the function of the long column is to limit the downward swing. The maximum swing angle of lever 45; at the same time, it is necessary to ensure that the mounting part set at the upper end of the long column, whether connected to the frame crossbeam A2 or the mounting plate, has an adjustable connection point, so as to facilitate adjustment of the position of the limiting device 43 and better match the lower swing lever 45; in this example, a cylindrical pin with adjustment function is selected as the return pin 44, which is installed at one end of the push arm 42, and this end is located near the lower swing lever 45, so that the height position of the return pin 44 on the push arm 42 can be adjusted to better match the adjustment of the height position of the lower swing lever 45; in this example, a swing lever with both ends extending and the middle swinging, which is common in the industry, is selected as the lower swing lever 45, which is installed at the lower end of the locking device 5 and is connected to the locking device. The movable lock head 56 of the locking device 5 is connected separately and can drive the movable lock head 56 to rotate within the locking device 5. A helical tension spring commonly used in this industry is selected as the return spring 46, or a body elastic body such as a rubber strip can be selected as the return spring 46. The return spring 46 is installed between one end of the lower swing rod 45 and the spring seat 47, located at the opposite end of the return pin 44, and can provide elastic force to the lower swing rod 45. A spring hanger commonly used in this industry is selected as the spring seat 47, or holes, slots, protrusions, etc. in the existing structure can be used as the spring seat 47, as long as it can hang the tension spring. The spring seat 47 is installed on the mounting plate or the crossbeam A2 of the frame, and can hang the return spring 46. In this way, the implementation of the swing device 4 is completed.

[0038] In this example, the lifting device 3 includes a swing shaft 31, an upper swing arm 32, a support roller 33, a support roller shaft, and a support roller rail 34. A hollow shaft, commonly used in this industry, is selected as the swing shaft 31. The swing shaft 31 is installed between the left wall A22 and the right arm A24 of the crossbeam. A core shaft with fixing devices at both ends, commonly used in this industry, is fixedly connected to the left wall A22 and the right arm A24 of the crossbeam. In this example, the swing shaft 31 and the core shaft are designed to swing, with the core shaft fixed and the upper swing arm 32 fixedly connected to the swing arm shaft 31. This design facilitates the use of multiple upper swing arms. The structure of the swing arm 32 is simplified; of course, depending on the internal installation of the frame beam A2, the swing shaft 31 can also be installed on the mounting bracket of the mounting device 1 and connected to the frame beam A2 or the mounting device 1; in this example, two upper swing arms 32 are selected and installed on the swing shaft 31 in pairs. The upper swing arms 32 are plate-shaped with a wedge-shaped lower edge. The height difference of the wedge matches the stroke of the movable sliding sleeve 55 of the locking device 5. The other end of the upper swing arm 32 passes through the elongated hole on the fixed guide sleeve 53 and contacts the movable sliding sleeve 55 of the locking device 5, which can drive the movable sliding sleeve 55 to move up and down; two The upper swing arms 32 are located on both sides of the axis of the movable sliding sleeve 55, thus preventing the upper swing arms 32 from detaching from the movable sliding sleeve 55 when swinging. In this example, industry-standard pulleys with grooves on their outer circumference are selected as support rollers 33. Similarly, two are selected, each corresponding to one of the two upper swing arms 32. The support rollers 33 are mounted on the support roller shaft, and the support roller shaft is mounted on the power output element of the drive device 1. Since a cylinder is used as the drive device 1 in this example, the support roller shaft is mounted on the fork-shaped element at the end of the cylinder piston rod 11. The two ends of the support roller shaft are connected to the two support rollers 33 to ensure that the two support rollers 33 are connected. Wheel 33 can rotate on the support roller shaft; alternatively, the support roller shaft can rotate, or both the support roller shaft and the support roller 33 can rotate. The outer circumferential groove of the support roller 33 is fitted onto the upper swing arm 32 to prevent it from falling off and detaching from the upper swing arm 32. In this example, a plate-shaped rail is selected as the support roller rail 34. There are two of them. The support roller rail 34 is installed on the mounting plate of the mounting device 2 and fixedly connected to the mounting plate. The thickness of the support roller rail 34 matches the width of the outer circumferential groove of the support roller 33, and the installation direction of the support roller rail 34 is consistent with the movement direction of the support roller 33. This completes the implementation of the lifting device 3.

[0039] In this example, a cylinder commonly used in this industry is selected as the drive device 1. The cylinder is mounted on the mounting device 2 via a cylinder mounting bracket and is fixedly connected to the mounting device 2. A standard fork-shaped element is connected to the end of the cylinder piston rod 11. The cylinder is connected to the pneumatic system of the frame vehicle through a pipe and to the corresponding control system. In this example, a plate-shaped component, preferably a steel plate, is selected to facilitate welding to the frame crossbeam A2. This plate serves as the mounting plate for the mounting device 2. Various mounting brackets can be installed on the mounting plate according to different situations to accommodate the internal space of the frame crossbeam A2. To overcome the installation inconvenience caused by space limitations, the mounting device 2 is installed in the inner cavity of the end of the frame crossbeam A2 and connected to the inner cavity. The lifting device 3 is installed inside the frame crossbeam A2 and connected to the frame crossbeam A2, and simultaneously connected to the locking device 5 and the driving device 1. The swing device 4 is installed on the mounting device 2 and connected to the mounting device 2, and simultaneously connected to the locking device 5. The locking device 5 is connected to the frame crossbeam A2 through the fixed guide sleeve 53, and simultaneously connected to the lifting device 3 and the swing device 4. This completes the implementation of the present invention.

[0040] In this example, four automatic locks are installed on the frame A of the skeleton vehicle. This conforms to the common cargo box structure in the industry. Different numbers and specifications of automatic locks can also be installed depending on the type of cargo box frequently attached to the skeleton vehicle. Initially, the locking device 5 is in its original state, such as... Figure 4In this state, the movable lock head 56 is concealed within the frame crossbeam A2, ensuring that the upper surface of the frame crossbeam A2 is flush. When the cargo box is hoisted onto the frame A of the skeleton vehicle by the lifting equipment, the start switch of the control system is activated, the cylinder of the drive device 1 is started, the piston rod 11 begins to extend, pushing the roller shaft and thus pushing the two rollers 33 to move to the left. Since the upper swing arm 32 is a wedge-shaped structure, as the rollers 33 move, the upper swing arm 32 is pushed to swing around the swing shaft 31. The left end of the upper swing arm 32, which is in contact with the movable sliding sleeve 55, moves upward, simultaneously driving the movable lock head 56 to move upward in sync. Due to the action of the limiting device 43, the lower swing arm 45 is located between the low column and the high column of the limiting device 43. The low column of the limiting device 43 blocks the swinging motion of the lower swing arm 45 caused by the spring force of the return spring 46. On the other hand, due to the movable sliding sleeve 55... When the conical lock heads of the sliding sleeve 55 and the movable lock head 56 are located inside the fixed guide sleeve 53, neither the sliding sleeve 55 nor the conical lock head of the movable lock head 56 will rotate because their cross-sectional shapes are the same or similar. At this time, the push arm 42 moves synchronously with the support roller 33. When the piston rod 11 moves to the left end, the left end of the upper swing arm 32 also rises to the highest point. At this time, the sliding sleeve 55 drives the movable lock head 56 into the lock hole of the lock box at the bottom of the cargo box. When it passes the upper edge of the lock hole, the movable lock head 56 has exceeded the constraint of the slider hole 532 of the fixed guide sleeve 53. Adjust the limiting device 43. At this time, the height of the lower swing arm 45 is above the upper end of the low column of the limiting device 43, and it is freed from the constraint of the low column. Under the action of the return spring 46, the movable lock head 56 swings and locks the lock box at the bottom of the cargo box, thus completing the locking of the cargo box.

[0041] When unlocking is required, during the upward movement, the push arm 42 moves synchronously with the piston rod 11. When the movable sleeve 55 rises to its highest point, the push arm 42 also drives the return pin 44 to its farthest point. When the movable sleeve 55 reaches its highest point, the lower swing rod 45 swings, causing the lower swing rod 45 located at one end inside the positioning device 43 to press against the return pin 44. Therefore, adjusting the size and position of the push arm 42, or the position of the return pin 44, can adjust the maximum swing angle of the movable lock head 56. When unlocking is required, the piston rod 11 retracts and moves to the right, and the return pin 44 first drives the lower swing rod. 45 moves towards the limiting device 43. At this time, the movable lock head 56 will not move downward due to the restriction of the lock box on the cargo box. The movement of the upper swing arm 32 is absorbed by the compression spring 52. When the return pin 44 pushes the lower swing arm 45 to swing back to the original position, the conical lock head on the movable lock head 56 swings back to the original position and loses the constraint of the lock box. Under the action of the compression spring 52 and its own weight, it begins to fall. At the same time, it drives the lower swing arm 45 to enter the space between the long column and the low column of the limiting device 43. The automatic lock returns to the original position and completes one locking and unlocking cycle.

Claims

1. An automatic lock, characterized in that: The automatic lock is applicable to locking and unlocking the fixed connection between the cargo box and the skeleton vehicle. The automatic lock is installed between the cargo box and the skeleton vehicle and includes a drive unit, a mounting device, a lifting device, a swinging device, and a locking device. The drive unit is installed on the skeleton vehicle and located inside its crossbeam, connected to the skeleton vehicle via the mounting device, and connected to a power source. The drive unit can drive the lifting device and move the locking device to allow the locking device to enter or exit the lock box on the cargo box. The drive unit can also drive the swinging device and swing the movable lock head on the locking device to lock and unlock the movable lock head on the lock box on the cargo box, thereby achieving locking and unlocking of the skeleton vehicle and the cargo box. The mounting device... The device is installed inside the crossbeam of the vehicle frame and connected to it, supporting and mounting the drive unit, lifting unit, and swinging unit. The lifting unit is mounted on the mounting device and connected to the mounting device, the drive unit, and the left and right walls of the crossbeam of the vehicle frame. It is also connected to the locking device and can drive the moving parts of the locking device to move up and down. The swinging unit is mounted on the mounting device and connected to it, and is also connected to the swinging parts of the drive unit and the locking device. The locking device is installed inside the crossbeam of the vehicle frame and connected to it. It includes a fixed guide sleeve and a movable lock head, and is connected to the lifting unit and the swinging device. Under the drive of the lifting unit and the swinging device, it can realize the up and down movement of the movable lock head and its swinging around its own axis.

2. An automatic lock according to claim 1, characterized in that: The driving device is a pneumatic cylinder, a hydraulic cylinder, an electric push rod, or a servo motor.

3. An automatic lock according to claim 1, characterized in that: The mounting device includes a mounting plate and fasteners; the mounting plate is installed inside the frame crossbeam and connected to the frame crossbeam by fasteners; the fasteners are installed between the mounting plate and the frame crossbeam, which can fix the mounting plate to the frame crossbeam; the fasteners are screws or bolts.

4. An automatic lock according to claim 1, characterized in that: The lifting device includes a swing shaft, an upper swing arm, a support roller, a support roller axle, and a support roller rail. The swing shaft is installed on the left and right side walls of the frame crossbeam or on the mounting bracket of the mounting device, and is connected to the frame crossbeam or the mounting device. The upper swing arm is installed on the swing shaft, with one end fitted onto the swing shaft, allowing it to swing around the swing shaft or together with the swing shaft on the frame crossbeam or the mounting device. The other end extends into the locking device and contacts the movable sliding sleeve of the locking device, driving the movable sliding sleeve to move upward. The support roller is installed on the support roller axle, allowing it to rotate around the support roller axle or... The roller shaft rotates together with the support roller shaft; the support roller shaft is mounted on the power output element of the drive device and connected to the power output element, and its two ends are connected to two support rollers; the support roller shaft can rotate on the power output element, or the two support rollers can rotate on the support roller shaft, or both of the aforementioned relative rotations exist; the support roller rail is mounted on the mounting plate of the mounting device and is fixedly connected to the mounting plate; the number of support roller rails matches the number of support rollers, the thickness of the support roller rail matches the width of the outer peripheral groove of the support roller, and the installation direction of the support roller rail is consistent with the movement direction of the support roller.

5. An automatic lock according to claim 4, characterized in that: There are two upper swing arms, which are installed in parallel.

6. An automatic lock according to claim 4, characterized in that: The lower edge of the upper swing arm that contacts the support roller is wedge-shaped, meaning that when the support roller moves horizontally in a straight line, it can drive the upper swing arm to swing around the swing axis.

7. An automatic lock according to claim 1, characterized in that: The swinging device includes a push block, a push arm, a limiting device, a return pin, a lower swing rod, a return spring, and a spring seat. The push block is mounted on and connected to the drive device, and is located in the guide groove of the mounting plate. The lower end of the push block is connected to the push arm, enabling it to move together with the push arm. The push arm is mounted on and connected to the push block, with one end connected to the push block and the other end fitted with a return pin. The limiting device is mounted on the mounting plate or the frame vehicle crossbeam, and is connected to the mounting plate or the frame vehicle. The return pin is mounted at one end of the push arm, located near the lower swing rod. The lower swing rod is mounted at the lower end of the locking device and is separately connected to the movable lock head of the locking device, enabling it to rotate within the locking device. The return spring is mounted between one end of the lower swing rod and the spring seat; it is a tension spring that can pull the lower swing rod to swing when there is no obstruction or reverse external force. The spring seat is mounted on the mounting plate or the frame vehicle crossbeam and can hold the return spring.

8. An automatic lock according to claim 1, characterized in that: The locking device includes a lower spring seat, a compression spring, a fixed guide sleeve, a slip ring, a movable sliding sleeve, and a movable lock head. The lower spring seat is located at the bottom of the movable sliding sleeve and is connected to it. The outer diameter of the lower spring seat is larger than the bottom diameter of the movable sliding sleeve. The compression spring is mounted on the lower spring seat and fitted onto the lower outer circumference of the movable sliding sleeve. The compression spring is a helical compression spring. The fixed guide sleeve is installed inside the crossbeam of the vehicle frame and is fixedly connected to the inner side of the upper wall of the crossbeam. The middle slider hole of the fixed sliding sleeve corresponds to the lock hole on the cargo box lock box provided on the upper wall of the crossbeam. The middle of the fixed guide sleeve is provided with a slider hole, which is an irregular hole, a polygonal hole, or a circular hole with a guide element such as a key or spline. The cross-sectional shape and size of the slider hole correspond to those of the movable sliding sleeve. The cross-sectional shape and size of the portion of the slider hole located in the fixed guide are matched; the slip ring is installed on the movable slide sleeve and is located in the lower part of the movable slide sleeve and above the compression spring; the slip ring can slide on the movable slide sleeve; the movable lock head is installed in the movable slide sleeve and can rotate in the movable slide sleeve, and the bottom of the movable slide sleeve is connected to the lower swing rod of the swing device; the top of the movable lock head is provided with a conical lock head, and the lower part of the lock head has a cross-section that is roughly rectangular. When the movable lock head rotates, the bottom of the conical lock head on the movable lock head will overlap the elongated hole on the lock box at the bottom of the cargo box without falling off. When the movable lock head is screwed on until the bottom surface of the conical lock head is consistent with the cross-sectional direction geometry of the slider hole on the fixed guide sleeve, the conical lock head can be disengaged from the lock hole of the lock box at the bottom of the cargo box together with the movable lock head.

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