A middle locking device of a covered wagon with a cover

Abstract

This invention discloses a locking device for the center of a covered wagon, comprising a plug-in portion and a locking portion respectively disposed on two top covers, with a transmission portion between the plug-in portion and the locking portion. The plug-in portion has a locking hole. The transmission portion includes a connecting locking rod and a locking handle fixed thereon. The locking handle is used to drive the connecting locking rod to rotate, so that the connecting locking rod and the locking hole form an axial connection. The locking portion includes a linear mechanism and a locking mechanism. The linear mechanism is fixedly connected to one end of the connecting locking rod, allowing the connecting locking rod to be pushed into the locking hole before axial connection and pulled back to tighten the connecting locking rod and the plug-in portion after axial connection. The locking mechanism is used to lock the position of the locking handle. The plug-in portion, transmission portion, and locking portion are all disposed on the outer side of the top cover, with one top cover having an operating window, and the locking portion correspondingly disposed at the operating window. This invention achieves center locking of the split top cover, ensuring a tight closure and even force distribution, and eliminating the need for climbing to operate.

Description

Technical Field

[0001] This invention relates to the field of locking technology for the center of a split roof, and more specifically to a locking device for the center of a covered shed. Background Technology

[0002] Patent application CN121247274A discloses a synchronous split-opening canopy transmission device, comprising: a mounting frame; a track connected to the mounting frame; a split-opening canopy movably mounted on the track and including a first canopy and a second canopy; and a driving device for driving the first and second canopies to open or close synchronously. Driving the first and second canopies to open or close synchronously via the driving device simplifies operation, improves the use of split-opening canopies, increases loading and unloading efficiency, and enhances operational convenience, reliability, and safety. However, after loading goods and closing the first and second canopies, there is no locking device at their connection. Current solutions include using end wedge blocks to press the first and second canopies together for locking, and installing locking devices outside the vehicle. However, these methods suffer from uneven force distribution leading to incomplete closure in the middle, and require external operation from elevated positions. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a central locking device for covered wagons, which improves the sealing performance and structural integrity after the top cover is closed, thus ensuring the protective effect of cargo transportation.

[0004] To solve the above-mentioned technical problems, the present invention provides a locking device for the middle of a covered covered wagon, comprising a plug-in part and a locking part respectively disposed on two top covers, and a transmission part disposed between the plug-in part and the locking part; The connector has a locking hole; The transmission part includes a connecting locking rod, on which a locking handle is fixedly mounted. The locking handle is used to rotate the connecting locking rod so that the connecting locking rod is axially connected to the locking hole. The locking part includes a linear mechanism and a locking mechanism. The linear mechanism is fixedly connected to one end of the connecting locking rod and is used to push the other end of the connecting locking rod into the locking hole before the connecting locking rod is axially connected to the locking hole, and to pull back the other end of the connecting locking rod after the connecting locking rod is axially connected to the locking hole so that the connecting locking rod and the insertion part are tightened. The locking mechanism is used to lock the locking handle. The insertion part, transmission part and locking part are located on the outside of the top cover, and one of the top covers has an operation window, with the locking part located at the operation window.

[0005] In some embodiments, the locking part includes a support frame, and the locking mechanism includes two handle lock seats. The two handle lock seats are fixed on the support frame. The locking handle is provided with a first working position and a second working position. The first working position is the position of locking the handle when the other end of the connecting rod is not inserted into the locking hole, and the second working position is the position of locking the handle when the other end of the connecting rod is tightened with the insertion part. The two handle lock seats are respectively used to lock the locking handle in the first working position and the second working position.

[0006] In some embodiments, the handle lock seat includes a mounting seat and a rotating seat. The mounting seat is fixed on a support frame, and the rotating seat is rotatably connected to the mounting seat so that the rotating seat does not interfere with the locking handle. A first pin hole is provided on the rotating seat, and a second pin hole is provided on the locking handle. A handle lock pin is provided on the first pin hole, and the handle lock pin locks the locking handle by passing through the first pin hole and the second pin hole.

[0007] In some embodiments, the support frame includes a support frame and a top cap, the support frame is fixed at the operation window, the top cap is sealed and fixedly connected to the top of the support frame, and the linear mechanism and the locking mechanism are both located inside the support frame.

[0008] In some embodiments, the linear mechanism includes a limiting support, on which a locking screw is threadedly connected. The locking screw is coaxially arranged with a connecting locking rod. A collar is detachably fitted at one end of the locking screw near the connecting locking rod. A nut sleeve is welded to one end of the collar. The connecting locking rod is fixedly connected to the nut sleeve.

[0009] In some embodiments, the end of the locking screw away from the connecting locking rod is provided with a polygonal corner.

[0010] In some embodiments, a support rod is provided on the limiting support, the axis of the support rod is parallel to the locking screw, and an anti-rotation plate is slidably provided on the support rod. After the anti-rotation plate moves above the locking screw, it is locked onto the locking screw to prevent the locking screw from rotating.

[0011] In some embodiments, a third pin hole is provided at the end of the locking screw away from the connecting locking rod, and a stop pin is provided in the third pin hole.

[0012] In some embodiments, the locking hole includes an insertion hole, a rotating groove is formed on the wall of the insertion hole, and a T-shaped lock head is provided at one end of the connecting locking rod. The T-shaped lock head is used to extend into the insertion hole and screw into the rotating groove, so that the connecting locking rod is axially connected to the locking hole.

[0013] In some embodiments, the transmission part includes a support base disposed near the insertion part, and a support hole is provided on the support base. The support hole and the locking hole are arranged coaxially, and one end of the connecting locking rod passes through the support hole and slides with it.

[0014] The beneficial effects of this invention are as follows: 1. The present invention provides a locking device at the midpoint of the two split-top covers. A linear mechanism pulls back the locking rod to form a centering tension force, so that the mating surfaces of the top covers fit tightly together. This avoids the problems of incomplete closure and uneven gaps caused by end-squeezing locking, improves the sealing performance and structural integrity of the top covers after closure, and ensures the protective effect of goods transportation.

[0015] 2. The locking part of the present invention is integrated into the operation window of the top cover. The operator can complete all locking and unlocking operations through the operation window from the side or inside of the carriage without having to climb to the roof to work, thus completely eliminating the safety hazards of working at heights, while greatly shortening the operation time and improving the efficiency of loading and unloading operations.

[0016] 3. On the one hand, the present invention uses a locking mechanism to lock the two working positions of the locking handle with pins to prevent the connecting locking rod from rotating and disengaging; on the other hand, the linear mechanism adopts a threaded locking structure and is equipped with an anti-rotation plate for limiting, which can effectively resist the vibration and impact during vehicle operation, prevent the connecting locking rod from retracting and loosening on its own, and ensure a stable locking state.

[0017] 4. The entire device of the present invention is integrated on the outside of the top cover, without occupying the cargo space inside the carriage; the support frame adopts a sealed top structure, which can protect the internal transmission components from rainwater and dust erosion, and has a long service life; the connection structure of each component is simple, which can be adapted to newly built covered wagons, or to the addition and modification of the top cover of existing wagons, and has a wide range of applications. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the installation position of the locking device in the middle of the covered wagon according to the present invention; Figure 2 This is a schematic diagram of the structure of the locking device in the middle of the covered wagon of the present invention; Figure 3 This is a schematic diagram of the structure of the fixing base and the T-shaped lock head of the present invention; Figure 4 This is a schematic diagram illustrating the cooperation between the fixing base and the T-shaped lock head of the present invention; Figure 5 This is a schematic diagram of the locking part of the present invention; Figure 6 This is a schematic diagram of the structure of the locking part and the transmission part at the rotating connection part of the present invention; Figure 7 This is a schematic diagram showing the cooperation between the locking part and the transmission part of the present invention.

[0019] Reference numerals: First top cover 11; Second top cover 12; Operation window 121; Plug-in part 2; Fixing base 21; Locking hole 211; Insertion hole 2111; Rotating groove 2112; Transmission unit 3; T-shaped lock head 31; support base 32; connecting lock rod 33; locking handle 34; Locking part 4; handle lock seat 41; mounting seat 411; rotating seat 412; handle lock pin 413; stop pin 42; rotating connecting piece 43; nut sleeve 431; collar 432; pin 433; locking screw 44; limit support 45; support rod 46; anti-rotation plate 47; support frame 48; support frame 481; capping 482. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] like Figure 1 , 2 As shown, the central locking device for a covered wagon of the present invention is applied to a double-opening covered wagon, which includes a first top cover 11 and a second top cover 12. The central locking device includes a connector 2 and a locking part 4 respectively disposed on the two top covers, with a transmission part 3 disposed between the connector 2 and the locking part 4. In this embodiment, the connector 2 is fixedly installed on the outside of the first top cover 11, and the transmission part 3 and the locking part 4 are fixedly installed on the outside of the second top cover 12, without occupying the cargo space inside the wagon. An operating window 121 is provided on the second top cover 12, and the locking part 4 is correspondingly disposed at the operating window 121. Operators can operate the locking part 4 through the operating window 121 without climbing onto the roof.

[0022] like Figure 3 , 4 As shown, the insertion part 2 includes a fixing seat 21, which is fixed to the first top cover 11 by welding or bolt fastening. The fixing seat 21 is provided with a locking hole 211, which includes an axially opened insertion hole 2111. A rotating groove 2112 is provided circumferentially on the inner wall of the insertion hole 2111. The insertion hole 2111 and the rotating groove 2112 together form a locking groove structure.

[0023] like Figure 2 As shown, the transmission unit 3 includes a support base 32, a connecting locking rod 33, and a locking handle 34.

[0024] like Figure 3As shown, a T-shaped locking head 31 is fixedly provided at one end of the connecting locking rod 33 near the insertion part 2. The cross-sectional shape of the T-shaped locking head 31 is adapted to the cross-sectional shape of the insertion hole 2111 and can extend into the insertion hole 2111 axially. When the connecting locking rod 33 rotates around its own axis, the T-shaped locking head 31 can be screwed into the rotating groove 2112. Through the axial limiting effect of the rotating groove 2112, the axial connection between the connecting locking rod 33 and the locking hole 211 is realized, so that the connecting locking rod 33 cannot be dislodged from the locking hole 211 axially.

[0025] like Figure 2 As shown, the support base 32 is located near the insertion part 2 and is fixedly installed on the outer side wall of the second top cover 12. The support base 32 has a support hole, which is coaxially arranged with the locking hole 211. The connecting locking rod 33 passes through the support hole and slides in the support hole. The support base 32 provides radial support for the connecting locking rod 33, ensuring the coaxiality and stability of its axial movement and circumferential rotation.

[0026] The locking handle 34 is vertically fixed on the rod body of the connecting locking rod 33. The operator can drive the connecting locking rod 33 to rotate circumferentially by moving the locking handle 34, so as to realize the axial connection and release of the T-shaped lock head 31 and the locking hole 211.

[0027] like Figure 1 , 5 As shown, the locking part 4 includes a support frame 48, a linear mechanism, and a locking mechanism, both of which are integrated and installed inside the support frame 48.

[0028] like Figure 1 As shown, the support frame 48 includes a support frame 481 and a cap 482. The support frame 481 is fixedly installed at the operation window 121 of the second top cover 12. The open side of the support frame 481 corresponds to the operation window 121, making it easy for operators to reach in and operate. The cap 482 is sealed and fixedly connected to the top of the support frame 481, which can prevent rainwater and dust from entering the interior of the support frame 48, protect the internal transmission components, and extend the service life of the device.

[0029] like Figure 5 As shown, the linear mechanism is used to drive the connecting locking rod 33 to reciprocate along the axial direction to realize the insertion and tightening action. It includes a limit support 45, a locking screw 44 and a rotating connecting member 43.

[0030] The limiting support 45 is fixedly installed on the inner wall of the support frame 481. The limiting support 45 has an axial threaded hole, and the locking screw 44 is threaded through the threaded hole. The locking screw 44 and the connecting locking rod 33 are arranged coaxially. When the locking screw 44 is rotated, under the action of the threaded pair, the locking screw 44 can move axially back and forth relative to the limiting support 45.

[0031] like Figure 5, 6 As shown, the end of the locking screw 44 near the connecting locking rod 33 is connected to the connecting locking rod 33 via a rotating connector 43. Specifically, the rotating connector 43 includes a collar 432 and a nut sleeve 431. The collar 432 is detachably fitted onto the end of the locking screw 44, and the collar 432 and the locking screw 44 are in a circumferential rotational fit. The nut sleeve 431 is welded and fixed to the end of the collar 432 away from the locking screw 44, and the corresponding end of the connecting locking rod 33 is fixedly connected to the nut sleeve 431. This structure ensures that when the locking screw 44 rotates, the connecting locking rod 33 does not rotate circumferentially with it, but only moves axially synchronously with the locking screw 44.

[0032] In this embodiment, a limiting ring is provided at the end of the locking screw 44 near the connecting locking rod 33. The inner diameter of the end of the collar 432 away from the nut sleeve 431 is smaller than the diameter of the limiting ring, and the inner diameter of the end of the collar 432 near the nut sleeve 431 is larger than the diameter of the limiting ring. The inner diameter of the nut sleeve 431 is smaller than the diameter of the limiting ring, so that the limiting ring is restricted within the collar 432.

[0033] In this embodiment, the ends of the collar 432 and the locking screw 44 are axially limited by the pin 433 to prevent them from separating.

[0034] Furthermore, the end of the locking screw 44 away from the connecting locking rod 33 is provided with a polygonal head. In this embodiment, a hexagonal head structure is adopted, which makes it easy for operators to use wrenches or other tools to rotate the locking screw 44.

[0035] A support rod 46 is fixedly mounted on the limiting support 45. The axial direction of the support rod 46 is parallel to the axial direction of the locking screw 44. An anti-rotation plate 47 is slidably sleeved on the support rod 46. The anti-rotation plate 47 has a polygonal groove that mates with the polygonal corner head. When the locking screw 44 is adjusted to the locked position, the anti-rotation plate 47 is slid along the support rod 46 to the polygonal corner head of the locking screw 44, so that the polygonal groove of the anti-rotation plate 47 engages with the polygonal corner head, thereby restricting the circumferential rotation of the locking screw 44 and preventing the locking screw 44 from rotating and loosening on its own due to vehicle vibration, thus improving the locking reliability.

[0036] The locking screw 44 has a third pin hole at the end away from the connecting locking rod 33. A stop pin 42 is inserted in the third pin hole. The stop pin 42 is used to restrict the anti-rotation plate 47 from sliding along the support rod 46 and prevent the anti-rotation plate 47 from disengaging from the locking screw 44.

[0037] The locking mechanism is used to lock the working position of the locking handle 34, preventing the connecting locking rod 33 from rotating on its own and causing the T-shaped lock head 31 to disengage from the locking hole 211. For example... Figure 5 , 7 As shown, the locking mechanism includes two handle lock seats 41, which are fixed to the two opposite inner walls of the support frame 481 along the axial direction of the locking screw 44.

[0038] The locking handle 34 has two working positions: the first working position is when the T-shaped lock head 31 of the connecting locking rod 33 is not inserted into the locking hole 211, at which time the top cover can be opened and closed normally; the second working position is when the connecting locking rod 33 is tightened into the insertion part 2 and the T-shaped lock head 31 is fully screwed into the rotating groove 2112, at which time the handle 34 is locked, which is the locked working state. Two handle lock seats 41 are respectively set for the first and second working positions, and are used to lock and fix the locking handle 34 in the corresponding positions.

[0039] Specifically, the handle lock base 41 includes a mounting base 411 and a rotating base 412. The mounting base 411 is fixed to the inner wall of the support frame 481, and the rotating base 412 is rotatably connected to the mounting base 411 via a pin. The rotating base 412 can rotate freely around the pin and can automatically avoid interference with the locking handle 34 when the locking handle 34 moves to switch positions.

[0040] A first pin hole is provided on the rotating base 412, and a second pin hole is provided at the corresponding position on the locking handle 34. When the locking handle 34 is rotated to the corresponding working position, the corresponding rotating base 412 is rotated to align the first pin hole and the second pin hole coaxially, and then the handle locking pin 413 is inserted. The handle locking pin 413 passes through both the first pin hole and the second pin hole simultaneously, thus locking the locking handle 34 in the current working position. In this embodiment, the handle locking pin 413 adopts a pin structure with a cotter pin to prevent the locking pin from falling off by itself.

[0041] The locking operation process of this invention is as follows: The first top cover 11 and the second top cover 12 move along the track to a fully closed state. At this time, the locking hole 211 of the plug part 2 and the connecting locking rod 33 of the transmission part remain coaxially aligned.

[0042] At this time, the locking handle 34 is in the first working position and is locked by the handle lock seat 41 corresponding to the first working position. The operator can unlock the locking handle 34 by pulling out the handle lock pin 413 corresponding to the first working position through the operation window 121. Then, pull out the stop pin 42, move the anti-rotation plate 47, and cancel the circumferential locking of the anti-rotation plate 47 on the locking screw 44. Use a tool to rotate the polygonal head of the locking screw 44 so that the locking screw 44 moves axially in the direction of the insertion part 2, pushing the connecting lock rod 33 forward synchronously until the T-shaped lock head 31 at the end of the connecting lock rod 33 is fully inserted into the insertion hole 2111 of the fixed seat 21.

[0043] Pulling the locking handle 34 causes the connecting locking rod 33 to rotate 90°, so that the T-shaped lock head 31 is fully screwed into the rotating groove 2112, thereby achieving axial locking between the connecting locking rod 33 and the plug part 2. At this time, the T-shaped lock head 31 cannot be dislodged from the locking hole 211 axially.

[0044] Rotate the locking screw 44 in the opposite direction to move it axially away from the insertion part 2. By rotating the connecting piece 43, pull back the locking rod 33, thereby tightening the middle mating surfaces of the first top cover 11 and the second top cover 12 to complete the middle locking.

[0045] Rotate the rotating seat 412 corresponding to the second working position, align the rotating seat 412 corresponding to the second working position with the locking handle 34, insert the handle locking pin 413 to lock the locking handle 34; at the same time, slide the anti-rotation plate 47 to the polygonal corner of the locking screw 44 to restrict the circumferential rotation of the locking screw 44, and finally insert the stop pin 42 to complete the entire locking operation.

[0046] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A locking device for the middle section of a covered wagon, characterized in that, It includes a plug-in part (2) and a locking part (4) respectively provided on two top covers, and a transmission part (3) is provided between the plug-in part (2) and the locking part (4). The plug-in part (2) has a locking hole (211). The transmission part (3) includes a connecting locking rod (33), and a locking handle (34) is fixedly provided on the connecting locking rod (33). The locking handle (34) is used to rotate the connecting locking rod (33) so that the connecting locking rod (33) is axially connected to the locking hole (211). The locking part (4) includes a linear mechanism and a locking mechanism. The linear mechanism is fixedly connected to one end of the connecting locking rod (33) and is used to push the other end of the connecting locking rod (33) into the locking hole (211) before the connecting locking rod (33) is axially connected to the locking hole (211), and to pull back the other end of the connecting locking rod (33) after the connecting locking rod (33) is axially connected to the locking hole (211) so that the connecting locking rod (33) and the plug-in part (2) are tightened. The locking mechanism is used to lock the locking handle (34). The plug-in part (2), the transmission part (3) and the locking part (4) are located on the outside of the top cover. One of the top covers (12) has an operation window (121), and the locking part (4) is located at the operation window (121).

2. The locking device for the middle section of the covered wagon according to claim 1, characterized in that, The locking part (4) includes a support frame (48), and the locking mechanism includes two handle lock seats (41). The two handle lock seats (41) are fixed on the support frame (48). The locking handle (34) is provided with a first working position and a second working position. The first working position is the position of locking handle (34) when the other end of the connecting lock rod (33) is not inserted into the locking hole (211). The second working position is the position of locking handle (34) when the other end of the connecting lock rod (33) is tightened between the connecting part (2). The two handle lock seats (41) are respectively used to lock the locking handle (34) in the first working position and the second working position.

3. The locking device for the middle section of the covered wagon according to claim 2, characterized in that, The handle lock seat (41) includes a mounting seat (411) and a rotating seat (412). The mounting seat (411) is fixed on the support frame (48), and the rotating seat (412) is rotatably connected to the mounting seat (411) so that the rotating seat (412) will not interfere with the locking handle (34). A first pin hole is provided on the rotating seat (412), and a second pin hole is provided on the locking handle (34). A handle lock pin (413) is provided on the first pin hole. The handle lock pin (413) locks the locking handle (34) by passing through the first pin hole and the second pin hole.

4. The locking device for the middle section of the covered wagon according to claim 2, characterized in that, The support frame (48) includes a support frame (481) and a cap (482). The support frame (481) is fixed at the operation window (121). The cap (482) is sealed and fixedly connected to the top of the support frame (481). The linear mechanism and the locking mechanism are both located inside the support frame (481).

5. The locking device for the middle section of a covered wagon according to any one of claims 1 to 4, characterized in that, The linear mechanism includes a limiting support (45), on which a locking screw (44) is threadedly connected. The locking screw (44) is coaxially arranged with the connecting locking rod (33). A collar (432) is detachably fitted at one end of the locking screw (44) near the connecting locking rod (33). A nut sleeve (431) is welded to one end of the collar (432). The connecting locking rod (33) is fixedly connected to the nut sleeve (431).

6. The locking device for the middle section of the covered wagon according to claim 5, characterized in that, The locking screw (44) has a polygonal corner head at the end away from the connecting locking rod (33).

7. The locking device for the middle section of the covered wagon according to claim 5, characterized in that, The limiting support (45) is provided with a support rod (46), the axial direction of the support rod (46) is parallel to the locking screw (44), and an anti-rotation plate (47) is slidably provided on the support rod (46). After the anti-rotation plate (47) moves above the locking screw (44), it is locked on the locking screw (44) to prevent the locking screw (44) from rotating.

8. The locking device for the middle section of the covered wagon according to claim 5, characterized in that, The locking screw (44) has a third pin hole at the end away from the connecting locking rod (33), and a stop pin (42) is provided in the third pin hole.

9. The locking device for the middle section of a covered wagon according to any one of claims 1 to 4, characterized in that, The locking hole (211) includes an insertion hole (2111), and a rotating groove (2112) is provided on the hole wall of the insertion hole (2111). A T-shaped lock head (31) is provided at one end of the connecting locking rod (33). The T-shaped lock head (31) is used to extend into the insertion hole (2111) and screw into the rotating groove (2112), so that the connecting locking rod (33) is axially connected to the locking hole (211).

10. The locking device for the middle section of a covered wagon according to any one of claims 1 to 4, characterized in that, The transmission part (3) includes a support base (32), which is located near the insertion part (2). The support base (32) has a support hole, which is coaxially arranged with the locking hole (211). One end of the connecting locking rod (33) passes through the support hole and slides with it.

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