Connecting device of semitrailer

Abstract

The utility model provides a connecting device of a semitrailer. The connecting device of the semitrailer comprises a traction seat plate fixedly installed on a tractor, a lock catch rotationally connected to the outer side of the traction seat plate through a first positioning column, and a first fixing column arranged on the traction seat plate. According to the connecting device of the semitrailer, a locking block can be moved out of the inner side of a second clamping groove by pushing a push plate, then limiting of the locking block to a fixing device is relieved, and the fixing device can be pushed to move through a push rod in the process that a swing arm is driven to rotate in the axial direction under driving of an air cylinder; by the adoption of the structure, limiting on the lock catch can be automatically relieved, meanwhile, the fixing device can push the push plate to move and reset, limiting on the locking block by the push plate is relieved, and therefore in the process that the fixing device is driven by the air cylinder to reset, the lock catch can be automatically locked. The locking block can be clamped into the inner side of the second clamping groove through the elastic acting force of the elastic piece, locking of the fixator is automatically completed, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of semitrailer traction, and specifically discloses a connecting device for a semitrailer. Background Art

[0002] Chinese patent application No. 202122580089.1 discloses a connection device based on a grid-type semi-trailer; it includes a traction seat plate, a wear-resistant ring, a V-shaped notch, a lock, a fixer 1, a fixer 2, a fixing seat, a fixing earring, a fixing plate, a spring, a spring 1, a spring 2, a support plate 1, a support plate 2 and a fixing column, wherein: a wear-resistant ring is provided in the middle of the surface of the traction seat plate, and a V-shaped notch is provided on one side of the surface of the wear-resistant ring, and a lock is provided directly below the wear-resistant ring; the fixer 1 and the fixer 2 are provided on one side of the surface of the traction seat plate. The setting of the fixer 1, the fixer 2 and the fixing column of the utility model can effectively buffer the lock and the fixer 2 when encountering a bumpy road section and causing a collision, and at the same time has a double fixing effect, avoiding the lock from loosening and causing the risk of falling off, which is convenient for market promotion and application.

[0003] The above-mentioned fixer 1 needs to be opened manually, and after the lock is closed, it needs to be manually operated to lock the fixer 1, which is very inconvenient to operate. At the same time, after the lock is closed, there is a limit on one side of the fixer 2, which cannot stably support the lock. Utility Model Content

[0004] In view of the above-mentioned defects or shortcomings in the prior art, the present application aims to provide a connecting device for a semi-trailer, comprising a traction seat plate fixedly installed on a tractor, a lock buckle rotatably connected to the outer side of the traction seat plate through a first positioning column, a first fixing column arranged on the traction seat plate, a second fixing column arranged on the lock buckle, and a tension spring jointly sleeved on the outer sides of the first fixing column and the second fixing column, wherein a clamping seat is arranged on the bottom surface of the traction seat plate, a fixer is slidably connected to the inner side of the clamping seat, a limiting column arranged on the bottom surface of the traction seat plate is clamped on one side of the fixer, a locking mechanism located on the outer side of the clamping seat is arranged on the surface of the traction seat plate, an automatic opening and closing mechanism arranged on the traction seat plate is arranged on the surface of the fixer, and a pressure sensor located on the outer side of the lock buckle is fixedly sleeved on the bottom surface of the traction seat plate through a mounting plate.

[0005] Preferably, the automatic opening and closing mechanism includes a second positioning column and a third positioning column arranged on the bottom surface of the traction seat plate, the outer side of the second positioning column is movably sleeved with a cylinder, the outer side of one end of the second positioning column extending outside the cylinder is clamped with a second clamping ring, the outer side of the third positioning column is movably sleeved with a swing arm located on the outside of the fixer, the outer side of one end of the third positioning column extending outside the swing arm is clamped with a third clamping ring, the inner side of one end of the cylinder is movably sleeved with a fixing pin movably sleeved inside the swing arm, the outer side of one end of the fixing pin extending outside the swing arm is clamped with a fourth clamping ring, and the inner side of the swing arm is clamped with a push rod arranged on the fixer.

[0006] Preferably, the locking mechanism includes a first guide column, a second guide column and a fixed seat arranged on the bottom surface of the traction seat plate, the outer sides of the first guide column and the second guide column are movably sleeved with a push plate, and the outer sides of one end of the first guide column and the second guide column extending out of the push plate are clamped with a first clamping ring, the inner side of the fixed seat is clamped with a spring sheet, the inner side of the spring sheet is movably sleeved with a bolt threadedly sleeved inside the fixed seat, the outer side of the push plate is sleeved with a locking block located on the inner side of the clamping seat, and the inner side of the locking block is fixedly sleeved with a fixing rod located on the outer side of the push plate.

[0007] Preferably, the outer side of the fixer is provided with a first slot and a second slot respectively matched with the limiting column and the locking block.

[0008] Preferably, an arc-shaped groove matching the fixing rod is provided on the outer side of the push plate.

[0009] Beneficial effects:

[0010] 1. The connecting device of the semi-trailer can move the locking block out from the inner side of the second slot by pushing the push plate, thereby releasing the limit of the locking block on the fixer, and can drive the swing arm to rotate around the axial direction under the drive of the cylinder. The fixer can be pushed to move by the push rod, thereby releasing the limit of the fixer on the lock buckle. This structure can automatically release the limit of the lock buckle, and at the same time, the fixer can push the push plate to move and reset, and release the limit of the locking block on the push plate, so that when the fixer is reset under the drive of the cylinder, the locking block can be clamped into the inner side of the second slot by the elastic force of the spring sheet, and the fixing is automatically locked, which is convenient to operate.

[0011] 2. The connecting device of the semi-trailer can provide position-limiting support for the fastener through the clamping seat and the limit column, so that there are limit positions on both sides of the fastener, ensuring that the fastener can stably provide position-limiting support for the lock after the lock is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0013] Figure 1 It is a bottom schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 A magnified schematic diagram of the structure at center A;

[0015] Figure 3 It is a bottom top view of the structure of the utility model;

[0016] Figure 4 for Figure 3 Schematic diagram of pushing the middle push plate;

[0017] Figure 5 for Figure 4 Schematic diagram of opening the middle lock;

[0018] Figure 6 for Figure 4 A magnified schematic diagram of the structure at B in the figure.

[0019] In the figure: 1, traction seat plate; 2, first positioning column; 3, lock; 4, first fixing column; 5, second fixing column; 6, tension spring; 7, clamping seat; 8, fixer; 9, limit column; 10, locking mechanism; 101, first guide column; 102, second guide column; 103, fixing seat; 104, push plate; 105, first clamping ring; 106, spring; 107, bolt; 108, locking block; 109, fixing rod; 11, automatic opening and closing mechanism; 111, second positioning column; 112, third positioning column; 113, cylinder; 114, second clamping ring; 115, swing arm; 116, third clamping ring; 117, fixing pin; 118, fourth clamping ring; 119, push rod; 12, mounting plate; 13, pressure sensor; 14, first clamping groove; 15, second clamping groove; 16, arc groove. DETAILED DESCRIPTION

[0020] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0021] The accompanying drawings in the embodiments of the present invention: different types of section lines in the drawings are not marked according to national standards, nor do they impose any requirements on the materials of the components. Instead, they are used to distinguish the cross-sectional views of the components in the drawings.

[0022] See also Figure 1-6A connecting device for a semi-trailer comprises a traction seat plate 1 fixedly mounted on a tractor, a lock buckle 3 rotatably connected to the outer side of the traction seat plate 1 through a first positioning column 2, a first fixing column 4 arranged on the traction seat plate 1, a second fixing column 5 arranged on the lock buckle 3, and a tension spring 6 which is jointly sleeved on the outer sides of the first fixing column 4 and the second fixing column 5. A clamping seat 7 is arranged on the bottom surface of the traction seat plate 1, and a fixer 8 is slidably connected to the inner side of the clamping seat 7. The fixer 8 can be limited and guided by the clamping seat 7 so that the fixer 8 can move stably. A limiting column 9 arranged on the bottom surface of the traction seat plate 1 is clamped on one side of the fixer 8. The limit column 9 can provide limit support for the lock buckle 3 and the fixer 8 respectively. The surface of the traction seat plate 1 is provided with a locking mechanism 10 located on the outside of the card seat 7. The surface of the fixer 8 is provided with an automatic opening and closing mechanism 11 arranged on the traction seat plate 1. The bottom surface of the traction seat plate 1 is fixedly sleeved with a pressure sensor 13 located on the outside of the lock buckle 3 through a mounting plate 12. The lock buckle 3 can be detected by the pressure sensor 13 and it can be ensured that after the traction pin is inserted into the inner side of the lock buckle 3, the lock buckle 3 is in a closed state. At this time, the fixer 8 can be pushed to move by starting the cylinder 113 and the lock buckle 3 can be limited and supported by the fixer 8 at the same time.

[0023] The automatic opening and closing mechanism 11 includes a second positioning column 111 and a third positioning column 112 arranged on the bottom surface of the traction seat plate 1. The outer side of the second positioning column 111 is movably sleeved with a cylinder 113. The outer side of one end of the second positioning column 111 extending out of the cylinder 113 is clamped with a second clamping ring 114. The outer side of the third positioning column 112 is movably sleeved with a swing arm 115 located on the outer side of the fixer 8. The outer side of one end of the third positioning column 112 extending out of the swing arm 115 is clamped with a third clamping ring 114. Ring 116, an internal movable sleeve at one end of the cylinder 113 is provided with a fixing pin 117 movably sleeved inside the swing arm 115, and the outer side of one end of the fixing pin 117 extending outside the swing arm 115 is clamped with a fourth clamping ring 118, and the inner side of the swing arm 115 is clamped with a push rod 119 arranged on the fixer 8. After the locking block 108 is moved out from the inner side of the second clamping groove 15 by the drive of the cylinder 113, the fixer 8 can be driven to move, thereby realizing the automatic opening and closing of the fixer 8.

[0024] The locking mechanism 10 comprises a first guide column 101, a second guide column 102 and a fixed seat 103 arranged on the bottom surface of the traction seat plate 1, and the outer sides of the first guide column 101 and the second guide column 102 are movably sleeved with a push plate 104, and the push plate 104 can be limited and guided by the first guide column 101 and the second guide column 102, so as to manually push the push plate 104, and the first guide column 101 and the second guide column 102 extend out of the push plate 104. The outer side is clamped with a first clamping ring 105, and the inner side of the fixed seat 103 is clamped with a spring piece 106, and the inner movably sleeve of the spring piece 106 is threaded and sleeved on the fixed seat. The bolt 107 inside the fixed seat 103 can drive the locking block 108 to be stuck into the inner side of the second slot 15 through the elastic force of the spring piece 106, ensuring that the fixer 8 can lock itself after closing the lock buckle 3, and the outer side of the push plate 104 is sleeved with a locking block 108 located on the inner side of the seat 7, and the internal fixing sleeve of the locking block 108 is sleeved with a fixing rod 109 located on the outer side of the push plate 104. By pushing the push plate 104, the locking block 108 can be moved out from the inner side of the second slot 15 through the fixing rod 109, and then the locking block 108 can be released from the limit of the fixer 8, so that the fixer 8 can move under the drive of the cylinder 113.

[0025] The outer side of the fixing device 8 is provided with a first slot 14 and a second slot 15 which are matched with the limiting column 9 and the locking block 108 respectively.

[0026] Among them, an arc groove 16 adapted to the fixing rod 109 is opened on the outer side of the push plate 104. The push plate 104 can be limited by the cooperation of the arc groove 16 and the fixing rod 109, so that the push plate 104 is not easy to move after being manually pushed, ensuring that the push plate 104 can completely move the locking block 108 from the inner side of the second slot 15 through the fixing rod 109, and the push plate 104 can be driven to move under the movement of the fixer 8, thereby moving the arc groove 16 out from the outer side of the fixing rod 109, releasing the limit of the push plate 104 by the fixing rod 109, so that when the fixer 8 is closing the lock buckle 3, the locking block 108 can be reset under the elastic force of the spring piece 106, thereby automatically locking the fixer 8 through the locking block 108.

[0027] When the semi-trailer is connected, the status of the connection device is as follows: Figure 5As shown, through the movement of the tractor, the traction pin presses the lock buckle 3 to rotate around the axial direction of the first positioning column 2. When the pressure sensor 13 detects the pressure of the lock buckle 3, the traction pin is completely stuck in the inner side of the lock buckle 3, and the driver can start the cylinder 113. The cylinder 113 is started on the tractor. The swing arm 115 is driven by the cylinder 113 to move around the axial direction of the third positioning column 112, and the fixer 8 is pushed to move by the push rod 119. When the first slot 14 is completely stuck in the outer side of the limit column 9, the locking block 108 is automatically stuck in the inner side of the second slot 15 under the elastic force of the spring piece 106, and the connection of the semi-trailer is completed. The contents not described in detail in this description belong to the existing technology known to professional and technical personnel in this field.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A connecting device for a semi-trailer, comprising a traction seat plate (1) fixedly mounted on a tractor, a lock (3) rotatably connected to the outside of the traction seat plate (1) through a first positioning column (2), a first fixing column (4) arranged on the traction seat plate (1), a second fixing column (5) arranged on the lock (3), and a tension spring (6) mounted on the outside of the first fixing column (4) and the second fixing column (5), characterized in that: The bottom surface of the traction seat plate (1) is provided with a clamping seat (7), the inner side of the clamping seat (7) is slidably connected with a fixer (8), one side of the fixer (8) is clamped with a limiting column (9) arranged on the bottom surface of the traction seat plate (1), the surface of the traction seat plate (1) is provided with a locking mechanism (10) located outside the clamping seat (7), the surface of the fixer (8) is provided with an automatic opening and closing mechanism (11) arranged on the traction seat plate (1), and the bottom surface of the traction seat plate (1) is provided with a pressure sensor (13) located outside the lock buckle (3) through a mounting plate (12).

2. A connecting device for a semitrailer according to claim 1, characterized in that: The automatic opening and closing mechanism (11) comprises a second positioning column (111) and a third positioning column (112) arranged on the bottom surface of the traction seat plate (1); a cylinder (113) is sleeved on the outer side of the second positioning column (111); a second clamping ring (114) is clamped on the outer side of one end of the second positioning column (111) extending outside the cylinder (113); and a swing arm (115) located on the outer side of the fixer (8) is sleeved on the outer side of the third positioning column (112). The third positioning column (112) is clamped on the outer side of one end extending out of the swing arm (115), and a third clamping ring (116) is clamped on the outer side; a fixing pin (117) sleeved on the inner side of the swing arm (115) is sleeved on the inner side of one end of the cylinder (113); a fourth clamping ring (118) is clamped on the outer side of one end of the fixing pin (117) extending out of the swing arm (115); and a push rod (119) arranged on the fixer (8) is clamped on the inner side of the swing arm (115).

3. The connecting device for a semitrailer according to claim 1, characterized in that: The locking mechanism (10) comprises a first guide column (101), a second guide column (102) and a fixed seat (103) arranged on the bottom surface of the traction seat plate (1); a push plate (104) is mounted on the outer sides of the first guide column (101) and the second guide column (102); and a first clamping ring (105) is clamped on the outer sides of one end of the first guide column (101) and the second guide column (102) extending outside the push plate (104); a spring sheet (106) is clamped on the inner side of the fixed seat (103); a bolt (107) threadedly sleeved on the inner side of the spring sheet (106) is mounted on the inner side of the fixed seat (103); a locking block (108) located on the inner side of the clamping seat (7) is mounted on the outer side of the push plate (104); and a fixing rod (109) located on the outer side of the push plate (104) is mounted on the inner side of the locking block (108).

4. A connecting device for a semitrailer according to claim 3, characterized in that: The outer side of the fixer (8) is provided with a first clamping groove (14) and a second clamping groove (15) which are respectively matched with the limiting column (9) and the locking block (108).

5. The connecting device for a semitrailer according to claim 3, characterized in that: An arc-shaped groove (16) adapted to the fixing rod (109) is formed on the outer side of the push plate (104).

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