A trolley locking device

Abstract

The present invention discloses a trolley locking device in the technical field of large equipment module transport vehicle equipment facilities, aiming to solve the problems in the prior art of cumbersome operation of the locking device during trolley transportation. It affects the efficiency of taking and placing, and includes: a self-locking mechanism including a support, a movable stopper and a reset spring; a limiting groove is provided on the support; the movable stopper is movably connected to the support through a pin shaft; the movable stopper is divided into a self-locking section and a blocking section; one end of the reset spring is connected to the self-locking section; the other end is connected to the support; in the original state, the reset spring pulls the self-locking section so that the blocking section can partially block the limiting groove; when working, the axle enters the limiting groove, presses the blocking section to rotate, and causes the self-locking section to rotate and cooperate with the support to clamp the axle, thereby positioning the axle. The present invention is suitable for firefighting and construction transportation; the operator can conveniently self-lock the trolley to improve the efficiency of taking and placing.

Description

Technical Field

[0001] The invention relates to a trolley locking device and belongs to the technical field of equipment for large-scale equipment module transport vehicles. Background Art

[0002] When transporting large equipment modules to disaster relief or construction sites, they must efficiently load and unload carts. This improves rescue or construction efficiency. This puts higher demands on the deployment of these carts to the site. Existing standard fixtures require manual alignment. Once aligned, these fixtures still require manual fixation, which is time-consuming and labor-intensive. Furthermore, during urgent situations, the existing fixtures for loading and unloading carts are cumbersome, impacting efficiency. Summary of the Invention

[0003] The object of the present invention is to overcome the deficiencies in the prior art and to provide a trolley locking device that can save trolley recovery time and can stably fix the trolley in the locking device during transportation.

[0004] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0005] The present invention provides a trolley locking device, comprising a self-locking mechanism; the self-locking mechanism comprises a support, a movable stopper and a return spring; a limiting groove is provided on the support, and the movable stopper is movably connected to the support through a pin shaft; the movable stopper is divided into a self-locking section and a blocking section; one end of the return spring is connected to the self-locking section; and the other end is connected to the support; in the original state, the return spring pulls the self-locking section so that the blocking section can partially block the limiting groove; when working, the axle enters the limiting groove, pressing the blocking section to rotate, so that the self-locking section rotates and cooperates with the support to clamp the axle, thereby positioning the axle.

[0006] Furthermore, the blocking section of the movable block is provided with a spring pin; a locking hole is provided on the support; when the axle enters the limiting groove, the blocking section rotates until the spring pin is locked in the locking hole.

[0007] Furthermore, the limiting groove includes an oblique straight line surface and an arcuate surface; the oblique straight line surface and the arcuate surface are transitionally connected.

[0008] Furthermore, the self-locking section is in an inverted L shape.

[0009] Furthermore, the movable stopper close to the support side has an arc-shaped rib extending outward.

[0010] Furthermore, a fixing plate is connected to the bottom of the support.

[0011] Furthermore, it also includes a base plate; bolts pass through the fixing plate and the base plate to fix the self-locking mechanism to the base plate.

[0012] Furthermore, there are two self-locking mechanisms, which are fixedly connected to the base plate respectively.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention provides a trolley locking device. When the axle enters the limit groove, the movable stopper will be squeezed to rotate, so that the self-locking section of the movable stopper rotates to a state where it can cooperate with the support to lock the axle. During this process, the self-locking pressure of the trolley ensures that the axle enters the self-locking mechanism and is in a self-locking state.

[0015] In addition, in order to prevent the trolley in the self-locking state of the trolley locking device from generating an upward impact due to bumps during transportation and breaking free from the restraint of the trolley locking device, a spring pin is provided in the blocking section of the movable blocker. When the axle is not inserted, the telescopic end of the spring pin is pressed by the support and is in a forced retracted state; when the support cooperates with the self-locking section to lock the axle, the spring pin is driven by the blocking section to rotate to the locking hole. At this time, the telescopic end of the spring pin extends into the locking hole for secondary locking, which effectively prevents the trolley from jumping out of the locking device due to bumps and other reasons. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a trolley locking device provided by the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure in a non-working state;

[0018] Figure 3 for Figure 1 Structural diagram of the working state;

[0019] Figure 4 is the main view of the support;

[0020] Figure 5 It is a structural diagram of the movable block;

[0021] Figure 6 This is the assembly diagram for the spring pin;

[0022] Figure 7 is a three-dimensional diagram of a spring pin;

[0023] Figure 8 This is a schematic diagram of the trolley in a locked state;

[0024] In the figure: 1. Support; 2. Movable stopper; 3. Return spring; 4. Spring pin; 5. Limiting groove; 6. Pin shaft; 7. Locking hole; 8. Oblique straight line surface; 9. Arc surface; 10. Arc rib plate; 11. Fixed plate; 12. Bottom plate. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0028] See Figures 1 to 8 This embodiment provides a trolley locking device, including a self-locking mechanism, which includes a movable stopper 2, a return spring 3 and a spring pin 4. The movable stopper 2 and the support 1 are movably connected via a pin 6, so that the movable stopper 2 can rotate around the pin 6. A limiting groove 5 is provided on the support 1 for clamping the axle of the trolley into the limiting groove 5 for limiting the position. Figure 5 As shown, for the sake of clarity of description, the movable stopper 2 is divided into two parts by the pin 6, the upper part is the self-locking section, and the lower part is the blocking section. One end of the reset spring 3 is fixedly connected to the self-locking section, and the other end is fixedly connected to the support 1. In the original state without being placed in the trolley for limiting, the reset spring 3 pulls the self-locking section away from the support 1. Since the movable stopper 2 is movably connected by the pin 6, when the self-locking section moves away from the support 1, the blocking section rotates to a position that can just block the limiting groove 5 of the support 1. Combined with Figure 3 and Figure 8As described above, during operation, the axle is fed into the limiting groove 5. During the downward pressing process, the blocking section is affected by the force so that it rotates around the pin 6, and the axle smoothly enters the limiting groove 5. It can be seen that the self-locking section rotates toward the side close to the support 1 and cooperates with the support 1 to clamp the axle, limiting the range of movement of the axle.

[0029] Optionally, in order to prevent the trolley from shaking up and down due to bumps during transportation, the self-locking section is ejected from the restriction of the self-locking mechanism. A spring pin 4 is installed on the blocking section, and a locking hole 7 is opened on the support 1. Figure 6 As shown, in the original state without being inserted into the trolley, the telescopic end of the spring pin 4 is in a retracted state under force against the side wall of the support 1. When inserted into the trolley, the spring pin 4 rotates around the pin shaft 6 along with the blocking section to reach the locking hole 7. Without the obstruction of the side wall, the telescopic end extends into the locking hole 7. Figure 7 The spring pin 4 can be a self-locking spring pin 4 of model VCN220 for assembly. When using the trolley, the spring pin 4 can be pulled out of the locking hole 7 and moved outward from the axle. The return spring 3 drives the movable stopper 2 to rotate, so that the self-locking section is away from the support 1, and the trolley can be moved away smoothly.

[0030] Optional, combined Figure 4 As shown, the limiting groove 5 is transitionally connected by an oblique straight surface 8 and an arcuate surface 9. When the axle is sent to the limiting groove 5, the oblique straight surface 8 can guide the axle, so that the axle can smoothly reach the arcuate surface 9 along the oblique straight surface 8, and unnecessary collision between the axle or the support 1 can be avoided during rapid storage.

[0031] Optionally, the self-locking section is set to an inverted L shape. When the axle is subjected to upward force, the inverted L-shaped self-locking section can have a blocking effect, preventing the axle from breaking free from the restraint of the self-locking section, and can limit the cart in the up and down directions.

[0032] Optionally, a curved rib 10 extends outward from the wall of the movable stop 2 near the support 1. During repeated storage and retrieval of the trolley, the axle may cause some damage to the movable stop 2. The curved rib 10 can extend the useful life of the movable stop 2. In addition, the curved design of the curved rib allows for smooth lowering of the axle, reducing axle friction damage.

[0033] Optionally, a fixing plate 11 is provided at the bottom of the support 1, which enables the self-locking mechanism to be directly fixed in the transport vehicle; or a base plate 12 is provided, and the two self-locking mechanisms are fixed by bolts passing through their respective fixing plates 11 and the base plate 12, thereby obtaining a trolley locking device with a double self-locking mechanism.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A trolley locking device, characterized in that: It includes a self-locking mechanism; the self-locking mechanism includes a support, a movable stopper and a return spring; the support is provided with a limit groove; the movable stopper is movably connected to the support via a pin; the movable stopper is divided into a self-locking section and a blocking section; one end of the return spring is connected to the self-locking section; the other end is connected to the support; In the original state, the return spring pulls the self-locking section so that the blocking section can partially block the limiting groove; when working, the axle enters the limiting groove, pressing the blocking section to rotate, so that the self-locking section rotates and cooperates with the support to clamp the axle, thereby positioning the axle; the blocking section of the movable block is provided with a spring pin; a locking hole is provided on the support; when the axle enters the limiting groove, the blocking section rotates until the spring pin is stuck in the locking hole.

2. A trolley locking device according to claim 1, characterized in that: The limiting groove includes an oblique straight line surface and an arcuate surface; the oblique straight line surface and the arcuate surface are transitionally connected.

3. A trolley locking device according to claim 1, characterized in that: The self-locking section is in an inverted L shape.

4. A trolley locking device according to claim 1, characterized in that: The movable stopper close to one side of the support has an arc-shaped rib extending outward.

5. A trolley locking device according to claim 1, characterized in that: The bottom of the support is connected with a fixing plate.

6. A trolley locking device according to claim 5, characterized in that: It also includes a base plate; bolts pass through the fixing plate and the base plate to fix the self-locking mechanism on the base plate.

7. A trolley locking device according to claim 6, characterized in that: There are two self-locking mechanisms, which are respectively fixedly connected to the base plate.

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