A torsion spring lock for locking railway freight cars

Abstract

A torsion spring lock for locking a railway freight car comprises: a pair of support plates, the pair of support plates are parallel to each other and fixed on the railway freight car, and a lock hole is provided on the railway freight car; a lock rod, the lock rod is passed through the support plates and can slide and rotate relative to the pair of support plates; a lock plate, the lock plate is fixedly connected to one end of the lock rod; a reset device, the reset device is provided on the lock rod, and can reset the lock rod and drive the lock plate to be clamped in the lock hole when the lock rod rotates relative to the pair of support plates. The torsion spring lock for locking a railway freight car according to the present invention can be effectively locked, and the reset device can reset the rotation of the lock rod and drive the lock plate to be clamped in the lock hole. It is simple and convenient to operate, can meet the use conditions of most freight cars, has low cost, and is easy to replace.

Description

Technical Field

[0001] The present invention belongs to the technical field of railway freight car locking devices, and more specifically, relates to a torsion spring lock for locking railway freight cars. Background Art

[0002] At present, the locking methods of the locking devices used in domestic railway freight cars are mainly to lock by inserting the spring-supported locking rod into the lock hole to form interference, and to lock by forming self-locking between the lock iron and the lock iron seat by friction. The locking devices designed based on the principle of interference locking by supporting the lock rod with a spring are generally relatively large in size. In this way, the weight of the lock rod itself is completely applied to the supporting spring, and after the superposition of the unstable stress generated during the operation of the vehicle, there is a risk that the lock rod will slip out of the lock hole. For the locking devices designed based on the principle of self-locking by friction, after the superposition of the unstable stress generated during the operation of the vehicle, the risk of the lock iron jumping out and causing locking failure is relatively greater. The problems reported during the operation of railway freight cars over the years have well verified the above situation.

[0003] Therefore, a torsion spring lock for locking railway freight cars is desired, which can avoid the problem of locking failure caused by vibration caused by alternating stress during driving. Summary of the invention

[0004] The purpose of the present invention is to provide a torsion spring lock for locking a railway freight car, which can avoid the problem of locking failure caused by vibration caused by alternating stress during driving.

[0005] In order to achieve the above-mentioned object, the present invention provides a torsion spring lock for locking a railway freight car, comprising:

[0006] A pair of support plates, the pair of support plates are parallel to each other and fixed on the railway freight car, and the railway freight car is provided with a lock hole;

[0007] A locking rod, which is passed through the support plate and can slide and rotate relative to the pair of support plates;

[0008] A lock plate, the lock plate being fixedly connected to one end of the lock rod;

[0009] A reset device is arranged on the lock rod and can reset the lock rod and drive the lock plate to be clamped in the lock hole when the lock rod rotates relative to the pair of support plates.

[0010] Preferably, the resetting device comprises:

[0011] A fixing rod, two ends of which are respectively connected to the pair of support plates and are parallel to the locking rod;

[0012] A fixing block, the fixing block being arranged on a side wall of the locking rod;

[0013] A torsion spring is sleeved on the locking rod, one end of the torsion spring is fixedly connected to the fixing block, and the other end of the torsion spring is slidably connected to the fixing rod.

[0014] Preferably, the maximum torsion angle of the torsion spring is no greater than 130°.

[0015] Preferably, the fixing rod is a round rod, a blocking piece is provided on the fixing rod, and the other end of the torsion spring is sleeved on the fixing rod and is located on a side of the blocking piece facing the locking plate.

[0016] Preferably, the fixing rod is a round rod with a smooth surface, the surface roughness of the fixing rod is not greater than 1.6 μm, and the gap between the other end of the torsion spring and the fixing rod is not greater than 2 mm.

[0017] Preferably, the fixing rod is a square rod, an L-shaped sliding groove is provided on the fixing rod, and the other end of the torsion spring is slidably connected in the sliding groove.

[0018] Preferably, the gap between the locking rod and the torsion spring is no more than 1 mm.

[0019] Preferably, it further comprises a bottom plate and an outer cover, wherein the bottom plate is fixed on the railway freight car, the pair of support plates are fixedly connected to the bottom plate, and the outer cover is detachably connected to the bottom plate and is arranged outside the resetting device;

[0020] The outer cover and the pair of support plates are both provided with a locking rod through hole, and the locking rod is inserted into the locking rod through hole.

[0021] Preferably, it further comprises a handle, which is an arc-shaped plate and is fixedly connected to the other end of the locking rod.

[0022] Preferably, the locking hole comprises a circular hole portion and a strip-shaped hole portion which are interconnected, and an angle is formed between a length direction of the strip-shaped hole portion and an initial direction of the locking plate, and the angle is not greater than 90°.

[0023] The invention relates to a torsion spring lock for locking a railway freight car, which has the beneficial effects of being able to lock effectively, resetting the rotation of the lock rod through a resetting device and driving the lock plate to be clamped in the lock hole, being simple and convenient to operate, being able to meet the use conditions of most freight cars, being low in cost and easy to replace.

[0024] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0026] Figure 1 A schematic structural diagram of a torsion spring lock for locking a railway freight car according to an exemplary embodiment of the present invention is shown;

[0027] Figure 2 A schematic structural diagram showing a reset device in a torsion spring lock for locking a railway freight car according to an exemplary embodiment of the present invention;

[0028] Figure 3 A side view of a torsion spring lock for locking a railway freight car showing an exemplary embodiment of the present invention;

[0029] Description of reference numerals:

[0030] 1 support plate, 2 locking rod, 3 locking plate, 4 fixing rod, 5 fixing block, 6 torsion spring, 7 bottom plate, 8 outer cover, 9 locking hole, 10 handle. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0032] In order to solve the problems existing in the prior art, the present invention provides a torsion spring lock for locking a railway freight car, comprising:

[0033] A pair of support plates, the pair of support plates are parallel to each other and fixed on the railway freight car, and the railway freight car is provided with a locking hole;

[0034] A locking rod, which is disposed through the support plate and can slide and rotate relative to the pair of support plates;

[0035] A locking plate, the locking plate being fixedly connected to one end of the locking rod;

[0036] The reset device is arranged on the lock rod and can reset the lock rod and drive the lock plate to be clamped in the lock hole when the lock rod rotates relative to the pair of support plates.

[0037] The torsion spring lock for locking a railway freight car according to the present invention can effectively lock the vehicle, and can reset the rotation of the lock rod through a reset device and drive the lock plate to be clamped in the lock hole. The operation is simple and convenient, and the use conditions of most freight cars can be met. The cost is low and the replacement is convenient.

[0038] Preferably, the resetting device comprises:

[0039] A fixing rod, both ends of which are respectively connected to a pair of support plates and are parallel to the locking rod;

[0040] A fixing block, which is arranged on the side wall of the locking rod;

[0041] The torsion spring is sleeved on the locking rod, one end of the torsion spring is fixedly connected to the fixing block, and the other end of the torsion spring is slidably connected to the fixing rod.

[0042] The fixed block is fixedly connected to the lock rod. Rotating the lock rod can drive the fixed block to drive one end of the torsion spring to rotate toward the other end, thereby compressing the torsion spring to achieve the purpose of energy storage. The lock rod is kept in a rotating state to push the lock rod to make the lock plate enter the lock hole. When the external force on the lock rod is removed, the fixed block of the lock rod drives the lock rod back to the initial state under the action of the extension force of the torsion spring, that is, the restoring force, and the lock plate rotates with the lock rod and is stuck by the side wall of the lock hole to achieve locking. Conversely, the lock rod can be kept in a rotating state and the lock rod can be pulled out to make the lock plate detach from the lock hole, so that unlocking can be completed. The torsion spring can keep the lock plate in position after the locked state is formed without rotating, which can effectively filter out the locking failure caused by the vibration caused by the alternating stress during driving.

[0043] Preferably, the fixing block and the locking rod are connected by welding or are integrally formed. The fixing block can have a certain limiting effect on the axial movement of the locking rod.

[0044] Preferably, when the torsion spring is not under stress, the maximum torsion angle of the torsion spring is not greater than 130°. When one end of the torsion spring rotates toward the other end of the torsion spring, the first angle decreases accordingly, and the torsion spring is compressed, generating a certain rebound energy storage process.

[0045] Preferably, the torsion spring is made of carbon spring steel.

[0046] Preferably, the fixing rod is a round rod, a baffle is provided on the fixing rod, and the other end of the torsion spring is sleeved on the fixing rod and is located on the side of the baffle facing the locking plate. The baffle is used to limit the other end of the torsion spring to prevent the other end of the torsion spring from axial movement when the torsion spring is compressed. The baffle and the fixing rod must be formed.

[0047] Preferably, the fixing rod is a round rod with a smooth surface, the surface roughness of the fixing rod is not greater than 1.6 μm, and the gap between the other end of the torsion spring and the fixing rod is not greater than 2 mm. The surface roughness of the fixing rod has a high requirement, which is convenient for reducing the wear caused by the axial movement of the other end of the torsion spring on the fixing rod.

[0048] Preferably, the fixing rod is made of stainless steel.

[0049] Preferably, the fixing rod is a square rod, and an L-shaped slide groove is provided on the fixing rod, and the other end of the torsion spring is slidably connected in the slide groove. One end of the L-shaped slide groove is located on the side of the square rod, and the other end is located in the square rod. The other end of the torsion spring extends into the other end of the slide groove, and the other end of the torsion spring is limited in a direction perpendicular to the axial direction of the locking rod by the side wall of the slide groove to prevent the other end of the torsion spring from falling out of the slide groove. The length of the slide groove can limit the displacement of the other end of the torsion spring on the fixing rod.

[0050] Preferably, the gap between the locking rod and the torsion spring is no greater than 1 mm.

[0051] Preferably, it also includes a bottom plate and an outer cover, the bottom plate is fixed on the railway freight car, a pair of support plates are fixedly connected to the bottom plate, and the outer cover is detachably connected to the bottom plate and is arranged outside the reset device;

[0052] The outer cover and a pair of support plates are both provided with lock rod through holes, and the lock rod is inserted into the lock rod through holes. The size of the bottom plate is coordinated with the length of the support plate and the lock rod, and the overall size of the torsion spring lock can be adjusted according to demand, which is convenient for application in various working conditions; the outer cover is used to seal and protect key structures such as the reset device to prevent external factors such as rain and snow from invading and reducing the service life. The bottom of the outer cover is provided with a connecting edge, which is connected to the bottom plate by bolts for easy disassembly and maintenance.

[0053] Preferably, the lock further comprises a handle, which is an arc-shaped plate, and is fixedly connected to the other end of the lock rod. The connection between the handle and the lock rod forms a first straight line, and the connection between the lock plate and the lock rod forms a second straight line, and the first straight line and the second straight line are collinear. The arc-shaped direction of the handle forms a snap-fitting state with the bottom plate, which is convenient for manual bending. The first straight line and the second straight line are collinear, which is convenient for controlling the rotation direction and rotation angle of the lock plate through the handle when unlocking in the locked state. The handle and the lock rod are fixedly connected by welding.

[0054] Preferably, the lock hole includes a circular hole portion and a strip hole portion that are interconnected, and the length direction of the strip hole portion forms an angle with the initial direction of the lock plate, and the angle is not greater than 90°. The circular hole portion is connected to the strip hole portion, the circular hole portion is used for the lock rod to enter and exit, and the strip hole portion is used for the lock plate to enter and exit.

[0055] Example 1

[0056] like Figures 1 to 3 As shown, the present invention provides a torsion spring lock for locking a railway freight car, comprising:

[0057] A pair of support plates 1, the pair of support plates 1 are parallel to each other and fixed on a railway freight car, and a locking hole 9 is provided on the railway freight car;

[0058] A locking rod 2, which is passed through the support plate 1 and can slide and rotate relative to the pair of support plates 1;

[0059] A locking plate 3, the locking plate 3 is fixedly connected to one end of the locking rod 2;

[0060] The reset device is arranged on the lock rod 2 and can reset the lock rod 2 and drive the lock plate 3 to be clamped in the lock hole 9 when the lock rod 2 rotates relative to the pair of support plates 1 .

[0061] In this embodiment, the resetting device includes:

[0062] A fixing rod 4, both ends of which are respectively connected to a pair of support plates 1 and are parallel to the locking rod 2;

[0063] A fixing block 5, which is arranged on the side wall of the locking rod 2;

[0064] The torsion spring 6 is sleeved on the locking rod 2 , and one end of the torsion spring 6 is fixedly connected to the fixing block 5 , and the other end of the torsion spring 6 is slidably connected to the fixing rod 4 .

[0065] The fixing block 5 is fixedly connected to the locking rod 2. Rotating the locking rod 2 can cause the fixing block 5 to drive one end of the torsion spring 6 to rotate toward the other end, thereby compressing the torsion spring 6 to achieve the purpose of energy storage. The locking rod 2 is kept in a rotating state and pushed to make the locking plate 3 enter the locking hole 9. When the external force on the locking rod 2 is removed, the fixing block 5 of the locking rod 2 drives the locking rod 2 to rotate back to the initial state under the extension force of the torsion spring 6, that is, the restoring force, and the locking plate 3 rotates with the locking rod 2 and is stuck by the side wall of the locking hole 9 to achieve locking. Conversely, the locking rod 2 can be pulled out to make the locking plate 3 disengage from the locking hole 9 while keeping the locking rod 2 in a rotating state, thereby completing unlocking.

[0066] In this embodiment, the fixing block 5 and the locking rod 2 are connected by welding.

[0067] When the torsion spring 6 is not under stress, the maximum torsion angle of the torsion spring 6 is 120°. When one end of the torsion spring 6 rotates toward the other end of the torsion spring 6, the first angle decreases accordingly, and the torsion spring 6 is compressed, generating a certain rebound energy storage process.

[0068] The torsion spring 6 is made of carbon spring steel.

[0069] The fixing rod 4 is a round rod, and a baffle is provided on the fixing rod 4. The other end of the torsion spring 6 is sleeved on the fixing rod 4 and is located on the side of the baffle facing the locking plate 3. The baffle and the fixing rod 4 are necessarily formed.

[0070] In this embodiment, the fixing rod 4 is a round rod with a smooth surface, the surface roughness of the fixing rod 4 is 1.6 μm, and the gap between the other end of the torsion spring 6 and the fixing rod 4 is 1 mm.

[0071] The fixing rod 4 is made of stainless steel. The gap between the locking rod 2 and the torsion spring 6 is 0.8 mm.

[0072] It also includes a bottom plate 7 and an outer cover 8, the bottom plate 7 is fixed on the railway freight car, a pair of support plates 1 are fixedly connected to the bottom plate 7, and the outer cover 8 is detachably connected to the bottom plate 7 and is arranged outside the reset device;

[0073] The outer cover 8 and the pair of support plates 1 are both provided with through holes for the locking rod 2, and the locking rod 2 is inserted into the through holes for the locking rod 2. The bottom of the outer cover 8 is provided with a connecting edge, which is connected to the bottom plate 7 by bolts.

[0074] The handle 10 is also included. The handle 10 is an arc-shaped plate. The handle 10 is fixedly connected to the other end of the lock rod 2. The connection between the handle 10 and the lock rod 2 forms a first straight line, and the connection between the lock plate 3 and the lock rod 2 forms a second straight line. The first straight line and the second straight line are collinear. The arc direction of the handle 10 forms a buckled state with the bottom plate 7, which is convenient for manual bending. The handle 10 is fixedly connected to the lock rod 2 by welding.

[0075] The lock hole 9 includes a circular hole portion and a strip hole portion that are connected to each other, and a second angle is formed between the length direction of the strip hole portion and the initial direction of the lock plate 3, and the second angle is 90°. The circular hole portion is connected to the strip hole portion, and the circular hole portion is used for the lock rod 2 to enter and exit, and the strip hole portion is used for the lock plate 3 to enter and exit.

[0076] Example 2

[0077] The difference between the torsion spring lock for locking a railway freight car according to this embodiment and the embodiment 1 is that:

[0078] In this embodiment, the fixing rod 4 is a square rod, and an L-shaped slide groove is provided on the fixing rod 4, and the other end of the torsion spring 6 is slidably connected in the slide groove. One end of the L-shaped slide groove is located on the side of the square rod, and the other end is located in the square rod. The other end of the torsion spring 6 extends into the other end of the slide groove, and the other end of the torsion spring 6 is limited in a direction perpendicular to the axial direction of the locking rod 2 by the side wall of the slide groove to prevent the other end of the torsion spring 6 from falling out of the slide groove. The length of the slide groove can limit the displacement of the other end of the torsion spring 6 on the fixing rod 4.

[0079] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A torsion spring lock for locking a railway freight car, characterized in that: include: A pair of support plates (1), the pair of support plates (1) being parallel to each other and fixed on a railway freight car, and a lock hole (9) is provided on the railway freight car; A locking rod (2), the locking rod (2) being inserted through the pair of support plates (1) and being capable of sliding and rotating relative to the pair of support plates (1); A locking plate (3), the locking plate (3) being fixedly connected to one end of the locking rod (2); a reset device, the reset device being arranged on the lock rod (2) and being capable of resetting the lock rod (2) and driving the lock plate (3) to be engaged in the lock hole (9) when the lock rod (2) rotates relative to the pair of support plates (1); The resetting device comprises: A fixing rod (4), wherein both ends of the fixing rod (4) are respectively connected to the pair of support plates (1) and are parallel to the locking rod (2); A fixing block (5), the fixing block (5) being arranged on a side wall of the locking rod (2); a torsion spring (6), wherein the torsion spring (6) is sleeved on the locking rod (2), and one end of the torsion spring (6) is fixedly connected to the fixing block (5), and the other end of the torsion spring (6) is slidably connected to the fixing rod (4); The maximum torsion angle of the torsion spring (6) is not greater than 130°; The fixing rod (4) is a round rod, a baffle is provided on the fixing rod (4), and the other end of the torsion spring (6) is sleeved on the fixing rod (4) and is located on the side of the baffle facing the locking plate (3).

2. The torsion spring lock for locking a railway freight car according to claim 1, characterized in that: The fixing rod (4) is a round rod with a smooth surface, the surface roughness of the fixing rod (4) is not greater than 1.6 μm, and the gap between the other end of the torsion spring and the fixing rod (4) is not greater than 2 mm.

3. The torsion spring lock for locking a railway freight car according to claim 1, characterized in that: The fixing rod is a square rod, the fixing rod (4) is provided with an L-shaped sliding groove, and the other end of the torsion spring (6) is slidably connected in the sliding groove.

4. The torsion spring lock for locking a railway freight car according to claim 1, characterized in that: The gap between the locking rod (2) and the torsion spring (6) is no greater than 1 mm.

5. The torsion spring lock for locking a railway freight car according to claim 1, characterized in that: It also comprises a bottom plate (7) and an outer cover (8), wherein the bottom plate (7) is fixed on the railway freight car, the pair of support plates (1) are fixedly connected to the bottom plate (7), and the outer cover (8) is detachably connected to the bottom plate (7) and is arranged outside the resetting device; The outer cover (8) and the pair of support plates (1) are both provided with a locking rod through hole, and the locking rod (2) is inserted into the locking rod through hole.

6. The torsion spring lock for locking a railway freight car according to claim 1, characterized in that: It also comprises a handle (10), the handle (10) being an arc-shaped plate, and the handle (10) being fixedly connected to the other end of the locking rod (2).

7. The torsion spring lock for locking a railway freight car according to claim 6, characterized in that: The locking hole (9) comprises a circular hole portion and a strip hole portion which are interconnected, and an angle is formed between the length direction of the strip hole portion and the initial direction of the locking plate (3), and the angle is not greater than 90°.

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