CN106476817A - A kind of semitrailer fixing device for railway transportation - Google Patents

Abstract

The invention provides a semi-trailer fixing device for railway transportation, which belongs to the technical field of machinery. It solves the problems of troublesome operation and poor stability of the existing semi-trailer fixing device. The semi-trailer fixing device used for railway transportation includes a flat car bottom frame, a support frame is provided on the flat car bottom frame, and a clamping piece is arranged on the support frame. The clamping piece includes two oppositely arranged clamping arms, two The lower ends of the clamp arms each have a support portion extending toward the other clamp arm, and the upper ends of the two clamp arms each have a pressing portion extending toward the other clamp arm. The clamp arms are slidably connected to the support frame, and the two clamp arms are upward It can be opened when moving, and can be close to each other when moving downward, and the pressing part is pressed on the wheel, and a locking piece that can limit the upward movement of the clamp arm is also provided between one of the clamp arms and the support frame. The fixing device for the semi-trailer can realize the limitation in the front, rear, left and right, and up and down directions after the semi-trailer is hoisted and fixed, and there is no deviation during transportation, and the stability is good.

Description

A semi-trailer fixing device for railway transportation

technical field

The invention belongs to the technical field of machinery and relates to a semi-trailer fixing device for railway transportation.

Background technique

Flat cars are mainly used to transport steel, wood, automobiles, mechanical equipment and other bulky or heavy goods, and other goods can also be transported by means of containers. In railway transportation, containers are generally placed in flat cars for transportation.

As Chinese patent application (Application No.: 201020622291.5) discloses a special flat car underframe for railway containers, the underframe includes a well-type concave bottom structure assembled and welded by side beams, large and small beams, and locking devices; The side beams are assembled and welded by bending side wall panels matching the railway limits, carrying special-shaped steel and built-in bending side columns, and guide plates are installed on the side beams; the large beams are placed in the container in the device The load-bearing position is a box-shaped structure welded by the bottom plate and the top plate. The top plate is folded into an ingot shape, and is welded together with the side columns and the lower side beams in the side beams through several oval holes; the lock head is The fixed lock head is arranged at the end of the device. When in use, the container is placed in the concave bottom structure, and the lock holes at the bottom of the container are plugged into the lock head one by one, so that the container can be positioned. The above-mentioned flat car underframe has the following defects: 1. Since the size of the concave bottom structure is fixed, the flat car can only fix a certain size and type of container, and the versatility is poor; 2. The container is fixed through the fixed lock head and keyhole It is fixed with the cooperation, and the up and down direction cannot be fixed, so it needs to be fixed with other binding parts. This kind of fixing method is not only troublesome to operate, but also difficult to guarantee the stability; 3. The container is hoisted from the car to the flat car. It takes a long time. After the driver transports the goods to the destination, he needs to wait for the loading and unloading process of the container, which is a waste of time.

For this reason, people have just thought of some new conveying methods, such as Chinese patent application (application number: 201610505052.3) discloses a kind of wheeled vehicle transportation device suitable for railway transportation, and this device is by hoisting the whole semi-trailer on the flat car Transport, so as to improve the limitation of the size of the container, and reduce the time for loading and unloading, but this device only limits the rolling direction of the wheels of the vehicle, that is, it can only limit the front and rear positions of the semi-trailer. There is no limit on the left and right positions and the up and down positions, therefore, it still needs to be fixed with other binding parts, which is not only troublesome to operate, but also the stability of the fixation is still poor.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems in the existing technology, and propose a semi-trailer fixing device for railway transportation. The technical problem to be solved by the present invention is: how to improve the stability and ease of operation of the semi-trailer after fixing sex.

The purpose of the present invention can be achieved through the following technical solutions: a semi-trailer fixing device for railway transportation, comprising a flat car chassis, the flat car chassis is provided with wheels for placement and can adjust the front and rear positions of the semi-trailer The position-limiting support frame is characterized in that the support frame is provided with a clamping piece capable of holding the wheel tightly, and the clamping piece includes two oppositely arranged clamping arms, and the lower ends of the two clamping arms have A supporting part extending in the direction of the clamping arm. The upper ends of the two clamping arms each have a pressing part extending in the direction of the other clamping arm and capable of pressing the wheel. The clamping arm is slidably connected to the support frame. The two clamping arms It can be opened when moving upwards, and the two clamping arms can be moved closer to each other when moving downwards, and the pressing part is pressed on the wheel, and a locking piece that can limit the upward movement of the clamping arms is also provided between one of the clamping arms and the support frame.

The support frame of the fixing device is mounted on the bottom frame of the flat car, so that the container and the semi-trailer can be directly hoisted onto the flat car for transportation. During the hoisting process, the two opposite clamping arms are kept open, the crane controls the semi-trailer to move down, and the wheels of the semi-trailer are against the support, so that the two clamping arms move forward together with the semi-trailer. Move down and get closer to each other, and then hold the wheel tightly. At this time, the pressing part of the clamp arm is pressed on the hub of the wheel, and then the clamp arm and the support frame are locked by the locking piece. When it needs to be loaded and unloaded after being transported to the destination, the locking part is opened, and then the semi-trailer is lifted by the crane to move upward. Since the pressing part of the clamp arm is pressed on the hub of the wheel, it can drive the two clamp arms to move upward together. And opened, the semi-trailer can be lifted out smoothly.

The supporting frame of the fixing device can be used for placing the wheels of the semi-trailer and limiting the front and rear directions, and the clamping arms are arranged on the supporting frame, and the corresponding two clamping arms are respectively located on both sides of the wheel, which can hold the wheel tightly to realize the positioning of the semi-trailer. The limit in the left and right direction, at the same time, the support part of the clamp arm is pressed downward by the wheel, and the pressing part can be pressed on the hub of the wheel to realize the limit in the up and down direction of the semi-trailer, through the locking effect of the locking part , the upward movement of the two clamping arms is locked, so that the front and rear, left and right, and up and down directions of the semi-trailer are well limited after being fixed, and there will be no deviation during transportation, and the stability is good. Moreover, the downward movement of the jig arm to move closer to hold the wheel and the upward movement to open both can be completed synchronously during the lifting, loading and unloading process, and the operation is relatively simple.

In the above-mentioned semi-trailer fixing device for railway transportation, the support frame has a support seat, and the support seat includes two slide plates arranged side by side, and both slide plates are provided with chute, and the chute includes The vertical slot and the inclined slot that is inclined outward relative to the vertical slot, the clamp arm is located between the two sliding plates, the clamp arm is pierced with a connecting shaft and the two ends of the connecting shaft pass through the clamp arm and are respectively slidably connected In the chute of the two sliding plates. There is a chute on the sliding plate, and the clamp arm is slidably connected in the chute. The chute includes a vertical groove and an inclined groove. Through the cooperation of the two, the two clamp arms can be opened when they move upward, and the two clamp arms can move downward. When the semi-trailer is fixed, it can get close to each other and hold the wheels tightly, so that the front and rear, left and right, and up and down directions of the semi-trailer are well limited, and there will be no deviation during transportation, and the stability is good. At the same time, the clamping arm is connected in the chute through the connecting shaft, and the clamping arm itself can swing around the connecting shaft, so that it is easier to open when the clamping arm moves upward, and when it moves downward, the wheel presses on the supporting part. The tightening part can be pressed tightly on the hub of the wheel, and the stability is better after being fixed. Moreover, the downward movement of the clamp arm along the chute to close and hold the wheel and the upward movement to open are both completed synchronously, without being driven by other driving parts, and the operation is relatively simple.

In the above-mentioned semi-trailer fixing device for railway transportation, a tension spring is provided between the clamp arm and the support frame so that the clamp arm always has a tendency to move upward, one end of the tension spring is connected to the support frame, and the other end is connected to the support frame. One end is connected on the connecting shaft. During the hoisting process, under the action of the tension spring, the clamp arms are in an open state, which makes the hoisting more convenient. The crane controls the semi-trailer to move down, and the wheels of the semi-trailer are against the support part, so that the two clamp arms follow the The semi-trailer moves down together and closes to each other and holds the wheels tightly, so that after the semi-trailer is fixed, the front and rear, left and right, and up and down directions are well limited, and there will be no deviation during transportation, and the stability is good. At this time , under the gravity of the semi-trailer, the extension spring is stretched. When it needs to be loaded and unloaded after being transported to the destination, the semi-trailer is lifted by the crane to move upward, so that the clamp arm can be moved upward. Since the tension spring is in a stretched state, the tension spring also has an upward pull on the clamp arm, so that Semi-trailer loading and unloading is more convenient and smooth.

In the above-mentioned semi-trailer fixing device for railway transportation, there are two extension springs, the two extension springs are respectively located on both sides of the clip arm, and the two ends of the two extension springs are connected to the support seat and the connecting shaft respectively. ends. By arranging tension springs on both sides, it is difficult to unilaterally deviate when the clip arm slides, and the stability is better, so as to ensure that the clip arm can hold the wheel stably.

In the aforementioned semi-trailer fixing device for railway transportation, there are two connecting shafts, and the two connecting shafts are arranged in parallel. A rectangle can be formed between the two connecting shafts and the chute groove walls of the two sliding plates, and the clamp arm can only tilt and swing under the cooperation of the inclined groove and the vertical groove, so that the stability of the clamp arm is more stable after the clamp arm hugs the wheel Well, not prone to offsets.

In the above-mentioned semi-trailer fixing device for railway transportation, the two connecting shafts are arranged near the bottom end of the clip arm, and the distance between the two connecting shafts is less than the length of the vertical groove and the length of the inclined groove, and the extension spring It is connected to the connecting shaft closer to the upper end of the jig arm. Two connecting shafts are arranged near the bottom of the clamp arm. When the clamp arm slides from the inclined groove into the vertical groove, since the wheel is pressed on the supporting part, the pressing part can be pressed against the wheel through the principle of leverage. On the hub, the stability is better after fixing. Moreover, the distance between the two connecting shafts is smaller than the length of the vertical groove and the inclined groove, so that the two connecting shafts can be located in the same chute when the clamp arm is in a tight state and when it is in an open state, further ensuring stability.

In the above-mentioned semi-trailer fixing device for railway transportation, there are connecting parts at both ends of the connecting shaft, the diameter of the connecting part is smaller than the diameter of the connecting shaft, and the connecting part is set in the chute, so The diameter of the connecting shaft is greater than the width of the chute. The above-mentioned design makes the connecting shaft have a limit position in the front and rear directions, and it is not easy to fall off from the chute, which further ensures the stability of the semi-trailer after it is fixed.

In the above-mentioned semi-trailer fixing device for railway transportation, the support part of one of the clamp arms has a hinge groove and the support part is pierced with a hinge shaft, and the other clamp arm has a mounting protrusion, and the mounting protrusion The bar has sliding grooves that run through the two side walls of the mounting protruding bar, the mounting protruding bar is set in the hinged groove and the hinge shaft passes through the sliding groove. The support parts of the two opposite clamping arms are connected by a hinge shaft, so that the relative position between the two clamping arms will not shift, ensuring better stability of the semi-trailer after it is fixed. At the same time, the coordinated design of the sliding groove and the hinge shaft can ensure that the two clamping arms can be opened and moved closer to each other.

In the above-mentioned semi-trailer fixing device for railway transportation, the locking member includes a locking tooth plate with one-way locking teeth on the plate surface, and the locking tooth plate is hinged on the support frame through a rotating shaft, One of the clamp arms has a one-way tooth groove, the locking tooth plate is arranged opposite to the clamp arm, and the one-way locking tooth can be locked in the one-way tooth groove. Through the joint action of the one-way locking teeth of the locking tooth plate and the one-way tooth groove on the clamp arm, the locking tooth plate presses the clamp arm downward, and the clamp arm is restricted from moving upward, so that the clamp arm It can hold the wheels very well. After the semi-trailer is fixed, the front and rear, left and right, and up and down directions are well limited. During transportation, there will be no deviation and good stability.

In the aforementioned semi-trailer fixing device for railway transportation, a torsion spring is sheathed on the rotating shaft, one end of the torsion spring is connected to the support frame, and the other end is connected to the locking tooth plate. By setting the torsion spring, the locking tooth plate can always have a tendency to be clamped on the clamp arm. After the hoisting is completed, the limit effect on the clamp arm is better and the stability is better. And because the locking direction is one-way, there is no need for manual operation during hoisting.

In the above-mentioned semi-trailer fixing device for railway transportation, there is also a relief groove on the support frame, the relief groove is set corresponding to the clamping piece, and the support part of the clamping arm can be embedded in the corresponding Give way to the slot. After the hoisting is completed, the support part of the clamp arm can be embedded in the relief groove, so that the support part and the bottom surface of the support frame are on the same level, which further ensures the stability of the semi-trailer after it is fixed.

In the above-mentioned semi-trailer fixing device for railway transportation, buffer patches are further provided on the upper end of the clamp arm and the pressing part. After the hoisting is completed, the two clamping arms clamp and hold the wheel of the semi-trailer tightly, and the pressing part is pressed against the wheel hub of the wheel. By setting the buffer patch on the upper end of the clamping arm and the pressing part, a buffering protection can be achieved. To prevent the wear of the hub of the wheel and to prevent abnormal noise caused by friction, the buffer patch is made of rubber material.

In the above-mentioned semi-trailer fixing device for railway transportation, the support frame has a support seat, and the support seat includes two sliding bars arranged side by side, and the sliding bar has a vertical section and a vertical section facing outwards. The inclined section arranged obliquely, the clamp arm is located between the two sliding rods, the clamp arm is pierced with a connecting shaft, the two ends of the connecting shaft pass through the clamp arm and both ends of the connecting shaft have connection holes, The two sliding rods respectively pass through the connecting holes at the two ends of the connecting shaft, and the connecting shaft can slide up and down along the sliding rod. The clamping arm can slide up and down along the sliding rod, and the sliding rod has a vertical section and an inclined section. Through the cooperation of the two, the two clamping arms can be opened when moving upward, and the two clamping arms can move closer and embrace each other when moving downward. Tighten the wheels, so that the front and rear, left and right, and up and down directions of the semi-trailer are well limited after being fixed, and there will be no deviation during transportation, and the stability is good. At the same time, the clamp arm is connected by a connecting shaft, and the clamp arm itself can swing around the connecting shaft, so that it is easier to open when the clamp arm moves upward, and when it moves downward, the wheel presses on the supporting part. Through the principle of leverage, the pressing part can be pressed Tight on the hub of the wheel, better stability after fixing.

In the above-mentioned semi-trailer fixing device for railway transportation, the locking member includes a locking bolt, the support frame has a threaded hole, and the clamp arm has a positioning hole, and the locking bolt is threaded on the In the threaded hole and the end can pass into the positioning hole. The locking bolt is threaded on the support frame. After the hoisting is completed, tighten the locking bolt so that the end of the locking bolt penetrates into the positioning hole on the clamp arm, so that the clamp arm is locked and cannot move up and down, so that the clamp The arm can hold the wheel very well. After the semi-trailer is fixed, the front and rear, left and right, and up and down directions are well limited. There will be no deviation during transportation, and the stability is good. When it needs to be unloaded after being transported to the destination, it is only necessary to loosen the lock nut so that its end exits the positioning hole of the clamp arm.

In the above-mentioned semi-trailer fixing device for railway transportation, the pressing part is formed by bending the upper end of the clamp arm to the direction of the other clamp arm, and the support part is bent from the lower end of the clamp arm to the direction of the other clamp arm. Fold to form. The pressing part and the supporting part are respectively formed by bending the two ends of the clamp arm, which is convenient for processing.

In the aforementioned semi-trailer fixing device for railway transportation, the support frame is detachably connected to the flat car chassis through fasteners. The support frame is detachable, which is convenient for replacement after damage, and the flat car can be used to hoist and fix the container after the support frame is removed, which has good versatility.

Compared with the prior art, this semi-trailer fixing device for railway transportation has the following advantages:

1. Through the cooperation of the clamping arm and the support frame, the front and rear, left and right, and up and down directions of the semi-trailer can be hoisted and fixed, and there will be no deviation during transportation, and the stability is good.

2. During the hoisting process of the semi-trailer, under the action of gravity of the semi-trailer, the clamping arm can automatically close to each other and hold the wheel tightly through the principle of leverage, with good stability. It can move up and open together with the semi-trailer, and the operation is more convenient.

3. The supporting parts of the two opposite clamping arms are connected by a hinge shaft, so that the relative position between the two clamping arms will not shift, ensuring better stability after the semi-trailer is fixed. At the same time, the sliding groove and The coordinated design of the hinge shaft can ensure that the two clamping arms can be opened and moved closer to each other.

4. The cushioning patch can act as a cushioning protection to prevent the wear of the hub of the wheel and prevent abnormal noise caused by friction.

Description of drawings

Fig. 1 is a structural diagram of the semi-trailer fixing device originally used for railway transportation in the first embodiment.

Fig. 2 is a perspective view of the semi-trailer fixing device used for railway transportation in the first embodiment.

Fig. 3 is a schematic perspective view of the three-dimensional structure of the first embodiment when the two clamping arms hold the wheel tightly.

Fig. 4 is a schematic diagram of the assembly of the support frame and the clamping member in the first embodiment.

Fig. 5 is an enlarged view at A in Fig. 4 .

Fig. 6 is an enlarged view at B in Fig. 4 .

Fig. 7 is a partial structural view of the support frame in the first embodiment.

Fig. 8 is an enlarged view at point C in Fig. 7 .

Fig. 9 is an exploded view of the clip.

Fig. 10 is a cross-sectional structure diagram of the first embodiment when the two clamping arms hold the wheel tightly.

Fig. 11 is a partial assembly diagram of the support frame and the clamping member in the second embodiment.

In the figure, 1, flat car underframe; 2, semi-trailer; 2a, wheel; 3, container; 4, support frame; 4a, support seat; 4a1, sliding plate; 4a2, chute; 4a2a, vertical groove; , inclined groove; 4a3, sliding rod; 4a3a, vertical section; 4a3b, inclined section; 4b, give way groove; 5, clamping piece; 5a, clamp arm; 5a1, support part; convex line; 5a1c, sliding groove; 5a2, pressing part; 5a3, one-way tooth groove; 6, locking piece; 6a, locking tooth plate; 7, connecting shaft; 7a, connecting part; 8, extension spring; 9 , hinged shaft; 10, rotating shaft; 11, torsion spring; 12, buffer patch.

detailed description

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

Embodiment one

As shown in Figure 1-10, the semi-trailer fixing device used for railway transportation includes a flat car underframe 1, and the flat car underframe 1 is provided with a space for placing the wheels 2a and can limit the front and rear positions of the semi-trailer 2. The support frame 4 is provided with a clamping member 5 capable of holding the wheel 2a. In this embodiment, there are two support frames 4 arranged side by side, and the support frames 4 are detachably connected to the underframe 1 of the flat car through fasteners, which is convenient for replacement after damage. Through this fixing device, the container 3 and the semi-trailer 2 can be hoisted directly on the flat car chassis 1 for transportation, and at the same time, the support frame 4 is removed, and the flat car chassis 1 can be used for hoisting and fixing the container 3, which has good versatility . Of course, it is also possible to use the two support frames 4 as an integrated structure. In this embodiment, each supporting frame 4 is provided with two clamping parts 5 , corresponding to the two front and rearmost tires of the semi-trailer 2 respectively.

As shown in Figures 7 and 8, a support base 4a is provided on the support frame 4, and the support base 4a includes two sliding plates 4a1 arranged side by side. Both sliding plates 4a1 are provided with a chute 4a2, and the chute 4a2 includes a vertical groove 4a2a and The inclined groove 4a2b is inclined outward relative to the vertical groove 4a2a.

As shown in Figures 3, 4 and 9, the clamping member 5 includes two opposite clamping arms 5a, the bottom end of the clamping arm 5a has a support portion 5a1, and the upper end of the clamping arm 5a has a pressing portion capable of pressing the wheel 2a 5a2, the pressing part 5a2 is formed by bending the upper end of the clamp arm 5a toward the other clamp arm 5a, and the supporting part 5a1 is formed by bending the lower end of the clamp arm 5a towards the other clamp arm 5a. The clamp arm 5a is positioned between the two slide plates 4a1, the clamp arm 5a is pierced with a connecting shaft 7 and the two ends of the connecting shaft 7 pass through the clamp arm 5a, the two ends of the connecting shaft 7 are connected to the connecting portion 7a, and the connecting portion 7a The diameter is smaller than the diameter of the connecting shaft 7, and the connecting part 7a is installed in the chute 4a2. There are two connecting shafts 7, and the two connecting shafts 7 are arranged in parallel. The spacing between the connecting shafts 7 is smaller than the length of the vertical groove 4a2a and the length of the inclined groove 4a2b. As shown in Figure 5, a tension spring 8 is provided between the clamp arm 5a and the sliding plate 4a1 so that the clamp arm 5a always has a tendency to move upward. One end of the tension spring 8 is connected to the sliding plate 4a1, and the other end is connected to the On the connecting shaft 7 at the upper end of the arm 5a, there are two extension springs 8, and the two extension springs 8 are respectively located on both sides of the two sliding plates 4a1. During the hoisting process, under the action of the tension spring 8, the two opposite clamp arms 5a are kept open, the crane controls the semi-trailer 2 to move down, and the wheel 2a of the semi-trailer 2 is against the support part 5a1 , so that the two clamping arms 5a move downward together with the semi-trailer 2, the connecting shaft 7 slides from the inclined groove 4a2b to the vertical groove 4a2a, the two clamping arms 5a move closer to each other, and then hold the wheel 2a tightly. At this time, The wheel 2a is pressed on the supporting part 5a1, and the pressing part 5a2 can be pressed on the hub of the wheel 2a through the principle of leverage, and the stability is good after fixing.

Furthermore, as shown in FIG. 9 , the support portion 5a1 of one clamp arm 5a has a hinge groove 5a1a and the support portion 5a1 is pierced with a hinge shaft 9 , and the other clamp arm 5a has a mounting protrusion 5a1b , There is a sliding groove 5a1c that runs through the two side walls of the installation convex strip 5a1b on the installation convex strip 5a1b, the installation convex strip 5a1b is set in the hinge groove 5a1a and the hinge shaft 9 passes through the slide groove 5a1c, so that the relative position between the two clamp arms 5a There will be no offset to ensure that the semi-trailer 2 has better stability after being fixed, and at the same time, it can ensure that the two clamping arms 5a can be opened and moved closer to each other.

As shown in FIGS. 1-5 , a locking member 6 capable of restricting the upward movement of the clamp arm 5 a is provided between one of the clamp arms 5 a and the support frame 4 . The locking member 6 includes a locking tooth plate 6a with one-way locking teeth on the plate surface. The locking tooth plate 6a is hinged on the support frame 4 through a rotating shaft 10. One of the clamp arms 5a has a one-way tooth groove 5a3, and the rotating shaft 10 The upper sleeve is provided with a torsion spring 11. One end of the torsion spring 11 is connected to the support frame 4, and the other end is connected to the locking tooth plate 6a. The locking tooth plate 6a is opposite to the clamp arm 5a and is locked one-way under the action of the clamp spring. The teeth can be snapped into the one-way tooth slots 5a3. Through the engagement of the one-way locking tooth of the locking tooth plate 6a and the one-way tooth groove 5a3 on the clamp arm 5a, the locking tooth plate 6a presses the clamp arm 5a downward, and the clamp arm 5a is restricted from upward Move, so that the clamp arm 5a can hold the wheel 2a well. After the semi-trailer 2 is fixed, the front and rear, left and right, and up and down directions are all well limited, and there will be no deviation during transportation, and the stability is good. And because the locking direction is one-way, there is no need for manual operation during hoisting.

As shown in Figure 7, the support frame 4 also has a relief groove 4b, which is arranged corresponding to the clamping member 5, and the support portion 5a1 of the clamp arm 5a can be embedded in the corresponding relief groove 4b, so that the support portion 5a1 It is on the same level as the bottom surface of the support frame 4, which further ensures the stability of the semi-trailer 2 after it is fixed.

As shown in Figure 9, a buffer patch 12 is also provided on the upper end of the clamp arm 5a and the pressing part 5a2, which can act as a buffer protection to prevent the hub of the wheel 2a from wearing out, and can prevent friction from producing abnormal noise. 12 adopt rubber material to make.

Embodiment two

The semi-trailer fixing device of this embodiment is basically the same as that of Embodiment 1, the difference is that: as shown in Figure 11, the support frame 4 has a support seat 4a, and the support seat 4a includes two sliding rods 4a3 arranged side by side. 4a3 has a vertical section 4a3a and an inclined section 4a3b inclined outward relative to the vertical section 4a3a. The clamp arm 5a is positioned between the two sliding rods 4a3, the clamp arm 5a is pierced with a connecting shaft 7, the two ends of the connecting shaft 7 pass through the clamping arm 5a and the two ends of the connecting shaft 7 have connecting holes, and the two sliding rods 4a3 respectively The connecting shaft 7 can slide up and down along the sliding rod 4 a 3 corresponding to the connecting holes passing through the two ends of the connecting shaft 7 . The clamping arm 5a can slide up and down along the sliding rod 4a3, and the sliding rod 4a3 has a vertical section 4a3a and an inclined section 4a3b. Through the cooperation of the two, the two clamping arms 5a can be opened when moving upward, and the two clamping arms 5a can be opened downward. When moving, they can move closer to each other and hold the wheel 2a tightly.

Embodiment three

The semi-trailer fixing device of this embodiment is basically the same as the first embodiment, the difference is that the locking member 6 includes a locking bolt, the support frame 4 has a threaded hole, the clamp arm 5a has a positioning hole, and the locking bolt is threaded. Connected in the threaded hole and the end can pass through the positioning hole. After the hoisting is completed, tighten the locking bolt so that the end of the locking bolt penetrates into the positioning hole on the clamp arm 5a, so that the clamp arm 5a is locked and cannot move up and down, so that the clamp arm 5a can hold the wheel well 2a. When it needs to be unloaded after being transported to the destination, it is only necessary to unscrew the locking nut so that the end thereof exits the positioning hole of the clamp arm 5a.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (10)

1. a kind of semitrailer fixing device for railway transportation, including flatcar underframe (1), described flatcar underframe (1) is provided with Place for wheel (2a) and spacing bracing frame (4) can be carried out to semitrailer (2) front and back position it is characterised in that described support Frame (4) is provided with the holder (5) that can hold wheel (2a) tightly, and described holder (5) includes two jig arm being oppositely arranged (5a), the lower end of two jig arm (5a) is respectively provided with the supporting part (5a1) extending to another jig arm (5a) direction, two jig arm (5a) upper end is respectively provided with the compressed part (5a2) extending and can compressing wheel (2a) to another jig arm (5a) direction, described Jig arm (5a) is slidably connected on support frame as described above (4), and two jig arm (5a) can be opened when moving up, and two jig arm (5a) are downwards Can mutually draw close when mobile and compressed part (5a2) is pressed on wheel (2a), between wherein one jig arm (5a) and bracing frame (4) It is additionally provided with and can limit the locking member (6) that jig arm (5a) moves up.

2. the semitrailer fixing device for railway transportation according to claim 1 is it is characterised in that support frame as described above (4) there is on support base (4a), described support base (4a) includes two sliding panels (4a1) being arranged side by side, on two sliding panels (4a1) It is equipped with chute (4a2), described chute (4a2) includes vertical slots (4a2a) and the outward-dipping setting of opposed vertical groove (4a2a) Tipper (4a2b), described jig arm (5a) is located between two sliding panels (4a1), and described jig arm (5a) is equipped with connecting shaft (7) And the two ends of connecting shaft (7) pass jig arm (5a) and are slidably connected at respectively in the chute (4a2) of two sliding panels (4a1).

3. the semitrailer fixing device for railway transportation according to claim 1 is it is characterised in that support frame as described above (4) there is on support base (4a), described support base (4a) includes two sliding bars (4a3) being arranged side by side, described sliding bar (4a3) There is vertical section (4a3a) and the tilting section (4a3b) of the outward-dipping setting of opposed vertical section (4a3a), described jig arm (5a) is located at Between two sliding bars (4a3), described jig arm (5a) is equipped with connecting shaft (7), the two ends of described connecting shaft (7) pass jig arm (5a) and the two ends of connecting shaft (7) are respectively provided with connecting hole, two sliding bars (4a3) correspond to the company through connecting shaft (7) two ends respectively Connect hole, described connecting shaft (7) can slide up and down along sliding bar (4a3).

4. the semitrailer fixing device for railway transportation according to Claims 2 or 3 is it is characterised in that described jig arm (5a) it is additionally provided with the extension spring (8) making jig arm (5a) have the trend of moving up all the time, described extension spring (8) and bracing frame (4) between One end is connected on bracing frame (4), and the other end is connected in connecting shaft (7).

5. the semitrailer fixing device for railway transportation according to claim 4 is it is characterised in that described connecting shaft (7) there are two, two connecting shafts (7) be arranged in parallel.

6. the semitrailer fixing device for railway transportation according to claim 5 is it is characterised in that two connecting shafts (7) near the setting of the bottom of jig arm (5a), the length and the inclination that are smaller than vertical slots (4a3a) between two connecting shafts (7) The length of groove (4a3b), described extension spring (8) is connected in that root connecting shaft (7) of closer jig arm (5a) upper end.

7. the semitrailer fixing device for railway transportation according to claim 1 or 2 or 3 is it is characterised in that wherein one Have on the supporting part (5a1) of individual jig arm (5a) and be equipped with jointed shaft (9), separately on hinged groove (5a1a) and this supporting part (5a1) Installation raised line (5a1b) is had on one jig arm (5a), described installation raised line (5a1b) has and runs through installation raised line (5a1b) two The sliding tray (5a1c) of side wall, described installation raised line (5a1b) is located in hinged groove (5a1a) and jointed shaft (9) pass through described Sliding tray (5a1c).

8. the semitrailer fixing device for railway transportation according to claim 1 or 2 or 3 is it is characterised in that described lock Tight part (6) includes the locking tooth plate (6a) in plate face with unidirectional latch, and it is hinged that described locking tooth plate (6a) passes through rotating shaft (10) On support frame as described above (4), one of jig arm (5a) has unidirectional teeth groove (5a3), described locking tooth plate (6a) with described Jig arm (5a) is oppositely arranged and described unidirectional latch can be stuck in described unidirectional teeth groove (5a3).

9. the semitrailer fixing device for railway transportation according to claim 8 is it is characterised in that described rotating shaft (10) On be arranged with torsion spring (11), described torsion spring (11) one end is connected on bracing frame (4), the other end be connected to locking tooth plate (6a) On.

10. the semitrailer fixing device for railway transportation according to claim 1 or 2 or 3 is it is characterised in that described Slot to make way (4b) is also had on bracing frame (4), described slot to make way (4b) and described holder (5) are correspondingly arranged, described jig arm (5a) supporting part (5a1) can embed in corresponding slot to make way (4b).