A locking device and a water hose bridge assembly trolley fixing device

Abstract

This utility model discloses a locking device and a hose bridge assembly trolley fixing device. The locking device is configured on the connecting frame of the truck body. The interior of the truck body frame has a receiving cavity for accommodating at least two trolleys. The bottom inner wall of the receiving cavity has multiple spaced first fixing holes. At least two trolleys abut against each other along the length of the receiving cavity and are arranged sequentially, with the first trolley abutting against the inner side wall of the receiving cavity. The device includes a connecting body and an elastic locking member. The connecting body is connected to the trolley located at the rear. The elastic locking member includes a first locking body and an elastic part. The first locking body is disposed opposite to the first fixing hole and is slidably connected to one end of the connecting body. The elastic part is connected to the first locking body and the connecting body and is used to push the first locking body into the first fixing hole to restrict the movement of the trolley relative to the truck body frame. This utility model can solve the problem of inconvenient access and operation when multiple fire truck accessory trolleys are fixed separately inside the truck body.

Description

Technical Field

[0001] This utility model relates to the field of fire truck technology, specifically to a locking device and a hose bridge assembly truck fixing device. Background Technology

[0002] To prevent goods from being damaged due to shaking during transportation, a trolley fixing and locking device was developed.

[0003] For example, Chinese utility model patent CN206606104U, entitled "A Trolley Fixing and Locking Device," is installed between the trolley and the bottom of the vehicle body. It includes an upper limit device installed at the bottom of the trolley, a lower limit device installed on the transport vehicle, and a fixing device on the same horizontal plane as the upper limit device. The lower part of the upper limit device interlocks with the upper part of the lower limit device. The upper limit device includes two parallel channel steels with a central folding plate between them. The opening of the upper limit device extends outwards on both sides, forming a bend that facilitates the entry of the trolley. The lower limit device has the same shape and size as the upper limit device. The fixing device includes a top post fixed to the bottom of the vehicle body, with one end of a stud connected to the top post and the other end fitted with a handwheel. A top cone is mounted on the upper end of the handwheel. This device is easy to operate, highly practical, easy to manufacture, low in cost, and suitable for mass production. It ensures that the trolleys will not collide with each other during transportation, preventing unnecessary losses.

[0004] Typically, securing multiple fire truck accessory trolleys inside the truck bed requires securing each trolley individually, which not only wastes resources but also presents inconvenience when retrieving and storing them. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a locking device and a hose bridge assembly trolley fixing device to solve the technical problem in the prior art that it is inconvenient to retrieve and store multiple fire truck accessory trolleys because each trolley needs to be fixed separately when fixing multiple fire truck accessory trolleys inside the truck compartment.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a locking device configured on a connecting carriage frame. The carriage frame has an internal cavity for accommodating at least two trolleys. The bottom inner wall of the cavity has a plurality of first fixing holes spaced apart along its length. At least two trolleys abut against each other along the length of the cavity and are arranged sequentially, with the first trolley abutting against the inner wall of the cavity. The device includes: A connector, attached to the trolley located at the rear; and The elastic locking member includes a first locking body and an elastic part. The first locking body is disposed opposite to the first fixing hole and slidably connected to one end of the connecting body. The elastic part is connected to the first locking body and the connecting body and is used to push the first locking body into the first fixing hole to restrict the movement of at least two of the trolleys relative to the carriage frame.

[0007] In some embodiments, the elastic snap-fit ​​component further includes a first connecting sleeve, the first connecting sleeve being hollow inside, one end of the first connecting sleeve being detachably connected to one end of the connecting body, and the other end having a slot connected to its interior, the first lock body being placed inside the first connecting sleeve, and one end of the first lock body sliding through the slot and inserted into the first fixing hole, one end of the elastic part being connected to the connecting body, and the other end being connected to the other end of the first lock body.

[0008] In some embodiments, one end of the connector is provided with a first guide hole, and the elastic snap-fit ​​member further includes a guide rod, one end of which is connected to the first lock body and the other end is slidably inserted into the first guide hole.

[0009] In some embodiments, the first connecting sleeve is further provided with a sliding groove communicating with its interior, and the elastic snap-fit ​​member further includes a sliding rod, one end of which passes through the sliding groove and is connected to the first lock body, and the other end is placed outside the first connecting sleeve.

[0010] In some embodiments, the connector has a weight-reducing groove around its perimeter, and the first connecting sleeve has a first connecting hole relative to the weight-reducing groove. The elastic snap-fit ​​component also includes four first connecting blocks and four first screws. The first connecting blocks are arranged one-to-one with the weight-reducing groove and are slidably embedded in the weight-reducing groove. The first connecting block has a first threaded hole, and the threaded end of the first screw passes through the first connecting hole and is threadedly connected to the first threaded hole.

[0011] In some embodiments, the top inner wall of the receiving cavity is provided with a second fixing hole opposite to the first fixing hole, and the locking device further includes a second lock body, which is inserted into the second fixing hole. The connecting body abuts against the trolley located at the rear, and the first lock body is detachably connected to the first fixing hole to restrict the trolley from sliding relative to the carriage frame.

[0012] In some embodiments, the other end of the connector is provided with a second guide hole, the second lock body has a large diameter section and a small diameter section, the large diameter section of the second lock body is inserted into the second guide hole, and the locking device further includes a second connecting sleeve, the second connecting sleeve is detachably sleeved on the other end of the connector, and is provided with a through hole relative to the second guide hole to allow the small diameter section of the second lock body to pass through.

[0013] In some embodiments, the second connecting sleeve has a second connecting hole relative to the weight reduction groove, and the locking device further includes four second connecting blocks and four second screws. The second connecting blocks are arranged one-to-one with the weight reduction groove and are slidably embedded in the weight reduction groove. The second connecting block has a second threaded hole, and the threaded end of the second screw passes through the second connecting hole and is threadedly connected to the second threaded hole.

[0014] In some embodiments, the first lock body has a spherical connecting end relative to the first fixing hole.

[0015] Secondly, this utility model also provides a water hose bridge assembly trolley fixing device, including: a carriage frame and at least one locking device as described above. The carriage frame has an internal cavity for accommodating at least two trolleys. The bottom inner wall of the cavity has a plurality of first fixing holes, which are spaced apart along their length. At least two trolleys abut against each other along the length of the cavity and are arranged sequentially. The first trolley abuts against the inner side wall of the cavity. A connecting body is connected to the trolley at the rear. A first lock body is disposed opposite to the first fixing hole and slidably connected to one end of the connecting body. An elastic part is connected to the first lock body and the connecting body and is used to push the first lock body into the first fixing hole to restrict the movement of the trolley relative to the carriage frame.

[0016] Compared with the prior art, the advantages of the locking device and water hose bridge assembly trolley fixing device provided by this utility model include: the connecting body is connected to one of at least two trolleys, the first locking body is disposed opposite to the first fixing hole on the carriage frame and is slidably connected to the connecting body, and under the action of the elastic restoring force of the elastic part, the first locking body can be inserted into the first fixing hole, so that at least two mutually abutting trolleys abut against the inner wall of the carriage frame's receiving cavity and the connecting body respectively, thereby restricting the movement of the trolleys relative to the carriage frame. Compared to existing technologies, the new technology utilizes a connector to link the trolley located at the rear, and forms a detachable connection structure between the trolley and the bottom inner wall of the receiving cavity via a first locking body and an elastic part. This allows the connector to restrict the movement of the outermost trolley relative to the vehicle frame, and locks at least two trolleys that abut against each other and are arranged sequentially within the receiving cavity. When retrieving and storing the trolley, only the outermost trolley needs to be released or locked, which is convenient to operate and saves on the cost of the locking structure. This technology solves the technical problem in existing technologies where multiple fire truck accessory trolleys need to be fixed individually inside the vehicle, resulting in inconvenient retrieval and storage operations. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of a locking device provided in an embodiment of the present invention; Figure 2 It is along Figure 1 Enlarged view of point A in the middle; Figure 3 It is along Figure 1 Enlarged view of point B in the middle; Figure 4 This is a three-dimensional view of a locking device provided in one embodiment of the present invention from another perspective; Figure 5 This is a three-dimensional view of a locking device connected to a carriage frame and multiple trolleys according to an embodiment of the present invention; Figure 6 This is a three-dimensional view from another perspective of a locking device connected to a carriage frame and multiple trolleys according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: Carriage frame 100; first fixing hole 110; second fixing hole 120; trolley 200; connector 300; elastic snap-fit ​​component 400; first lock body 410; elastic part 420; first connecting sleeve 430; guide rod 440; slide rod 450; first connecting block 460; first screw 470; second lock body 500; second connecting sleeve 600; second connecting block 700; second screw 800. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problem that securing multiple fire truck accessory trolleys 200 inside the truck compartment requires individually fixing each trolley 200, leading to inconvenience in retrieval and storage, this utility model provides a locking device and a hose bridge assembly trolley 200 fixing device. This device utilizes a connector 300 connected to the trolley 200 located at the rear, and a detachable connection structure is formed between the connector 300 and the bottom inner wall of the receiving cavity via a first locking body 410 and an elastic part 420. This allows the connector 300 to restrict the movement of the outermost trolley 200 relative to the truck compartment frame 100, and locks at least two mutually abutting and sequentially arranged trolleys 200 within the receiving cavity. Retrieval and storage only require unlocking or locking the outermost trolley 200, making operation convenient and saving on the cost of the locking structure.

[0021] Please see Figures 1 to 6 , Figure 1 , Figure 4 and Figure 5This is a schematic diagram of the structure of a locking device and a water hose bridge assembly trolley 200 fixing device according to an embodiment of the present invention. The locking device is disposed on the connecting carriage frame 100. The carriage frame 100 has a receiving cavity for accommodating at least two trolleys 200. The bottom inner wall of the receiving cavity has a plurality of first fixing holes 110, which are spaced apart along its length. At least two trolleys 200 abut against each other along the length of the receiving cavity and are arranged sequentially, with the first trolley 200 abutting against the receiving cavity. The inner wall of the vehicle is characterized by comprising: a connecting body 300 and an elastic locking member 400. The connecting body 300 is connected to the trolley 200 located at the rear. The elastic locking member 400 includes a first locking body 410 and an elastic part 420. The first locking body 410 is disposed opposite to the first fixing hole 110 and is slidably connected to one end of the connecting body 300. The elastic part 420 is connected to the first locking body 410 and the connecting body 300 and is used to push the first locking body 410 into the first fixing hole 110 to restrict the movement of the trolley 200 relative to the carriage frame 100.

[0022] In this device, compared with the prior art, the connecting body 300 is connected to the trolley 200 located at the rear, and a detachable connection structure is formed between the first locking body 410 and the elastic part 420 and the bottom inner wall of the receiving cavity. This allows the connecting body 300 to restrict the movement of the outermost trolley 200 relative to the vehicle frame 100, and to lock at least two mutually abutting and sequentially arranged trolleys 200 in the receiving cavity. When taking them out and storing them, only the outermost trolley 200 needs to be released or locked. This is convenient to operate and saves the cost of the locking structure. It can solve the technical problem in the prior art that it is inconvenient to take out and store multiple fire truck accessory trolleys 200 because each trolley 200 needs to be fixed separately when fixing multiple fire truck accessory trolleys 200 inside the vehicle.

[0023] Furthermore, to facilitate the transfer of the hose bridge assembly, it is usually secured to the trolley 200 using straps. Then, multiple trailers are arranged in sequence and abut against each other within the receiving cavity of the carriage frame 100. This will not be elaborated further here. The hose bridge assembly is a common and readily available device on the market and is a conventional setup known to those skilled in the art. For reference, please refer to Chinese Utility Model Patent No. CN213177033U, entitled "A Lightweight Anti-detachment Pipeline Crossing Device". This will not be elaborated further here.

[0024] In some embodiments, the bottom inner wall of the receiving cavity is provided with two rows of first fixing holes 110 along its length direction, and the distance between two adjacent first fixing holes 110 is equal to the width of the trolley 200, so that the connector 300 can be connected to any one of the first fixing holes 110 to limit the movement of multiple trolleys 200, which will not be elaborated here.

[0025] Furthermore, the elastic part 420 here is a spring, elastic block and spring sheet that are common and easy to purchase on the market. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0026] In one embodiment, please refer to Figure 2 , Figure 4 The first lock body 410 has a spherical connecting end relative to the first fixing hole 110.

[0027] The first lock body 410 is cylindrical, and its diameter gradually decreases along the direction close to the first fixing hole 110, forming a spherical connecting end, which makes it convenient for the user to insert the first lock body 410 into the first fixing hole 110 for easy operation.

[0028] In this embodiment, as Figure 2 As shown, the elastic snap-fit ​​component 400 also includes a first connecting sleeve 430. The first connecting sleeve 430 is hollow inside. One end of the first connecting sleeve 430 is detachably connected to one end of the connecting body 300, and the other end has a slot for connecting to its interior. The first lock body 410 is built into the first connecting sleeve 430, and one end of it slides through the slot and is inserted into the first fixing hole 110. One end of the elastic part 420 is connected to the connecting body 300, and the other end is connected to the other end of the first lock body 410.

[0029] The first connecting sleeve 430 is connected to one end of the connecting body 300 to realize the sliding connection between the first lock body 410 and the connecting body 300. At the same time, the first connecting sleeve 430 can restrict the separation between the first lock body 410 and the connecting body 300, thereby improving the stability of the device operation.

[0030] In one embodiment, please refer to Figure 2 , Figure 4 One end of the connector 300 is provided with a first guide hole, and the elastic snap-fit ​​component 400 also includes a guide rod 440, one end of which is connected to the first lock body 410 and the other end is slidably inserted into the first guide hole.

[0031] The guide rod 440 cooperates with the guide hole to connect and guide the sliding between the first lock body 410 and the connecting body 300.

[0032] In some embodiments, the first lock body 410 is stepped and has a large diameter section and a small diameter section, with the small diameter section of the first lock body 410 slidably inserted into the guide hole.

[0033] In one embodiment, please refer to Figure 2 , Figure 4The first connecting sleeve 430 also has a sliding groove that communicates with its interior. The elastic snap-fit ​​component 400 also includes a sliding rod 450, one end of which passes through the sliding groove and is connected to the first lock body 410, and the other end is placed outside the first connecting sleeve 430.

[0034] By driving the slide bar 450, which is externally mounted on the first connecting sleeve 430, to slide relative to the first connecting sleeve 430, the user can drive the first lock body 410 to slide relative to the first connecting sleeve 430, so that the first lock body 410 slides into the first connecting sleeve 430, thereby releasing the engagement between the first lock body 410 and the first fixing hole 110.

[0035] Furthermore, under the elastic action of the elastic part 420, the first lock body 410 slides out from the first connecting sleeve 430 and engages with the first fixing hole 110. At the same time, the slide groove limits the slide rod 450, which can restrict the sliding of the first lock body 410 relative to the first connecting sleeve 430.

[0036] In one embodiment, please refer to Figure 2 , Figure 4 The connector 300 has weight-reducing grooves around its perimeter. The first connecting sleeve 430 has a first connecting hole opposite to the weight-reducing groove. The elastic snap-fit ​​component 400 also includes four first connecting blocks 460 and four first screws 470. The first connecting blocks 460 are arranged one-to-one with the weight-reducing grooves and are slidably embedded in the weight-reducing grooves. The first connecting blocks 460 have first threaded holes. The threaded end of the first screw 470 passes through the first connecting hole and is threadedly connected to the first threaded hole.

[0037] To reduce the weight of the device, the connector 300 is strip-shaped and has weight-reducing grooves around its perimeter. The first connecting block 460, the first connecting hole and the first screw 470 form a detachable structure, so that the first connecting sleeve 430 can be detachably connected to the connector 300.

[0038] Furthermore, the connector 300 here is made of aluminum profile or aluminum alloy profile, which can reduce the weight of the device and make it easier for the user to operate.

[0039] In this embodiment, as Figure 1 , Figure 4 and Figure 6 As shown, the top inner wall of the receiving cavity has a second fixing hole 120 opposite to the first fixing hole 110. The locking device also includes a second lock body 500, which is inserted into the second fixing hole 120. The connecting body 300 abuts against the trolley 200 located at the rear. The first lock body 410 is detachably connected to the first fixing hole 110 to limit the sliding of the trolley 200 relative to the carriage frame 100.

[0040] The connector 300 abuts against the outermost trolley 200, and one end of the connector 300 is connected to the first fixing hole 110 on the bottom inner wall of the receiving cavity through the first locking body 410, and the other end of the connector 300 is connected to the second fixing hole 120 on the top inner wall of the receiving cavity through the second locking body 500. It is not only simple in structure, but also easy to operate.

[0041] In addition, in some embodiments, please refer to Figure 3 The second lock body 500 has a spherical connecting end relative to the second fixing hole 120.

[0042] The second lock body 500 is cylindrical, and its diameter gradually decreases along the direction close to the second fixing hole 120, forming a spherical connecting end, which makes it convenient for the user to insert the second lock body 500 into the second fixing hole 120 for easy operation.

[0043] In one embodiment, please refer to Figure 3 , Figure 4 The other end of the connecting body 300 is provided with a second guide hole. The second lock body 500 has a large diameter section and a small diameter section. The large diameter section of the second lock body 500 is inserted into the second guide hole. The locking device also includes a second connecting sleeve 600. The second connecting sleeve 600 is detachably sleeved on the other end of the connecting body 300 and has a through hole relative to the second guide hole to allow the small diameter section of the second lock body 500 to pass through.

[0044] The second lock body 500 is detachably connected to the connector 300 via the second connecting sleeve 600.

[0045] In one embodiment, please refer to Figure 4 The second connecting sleeve 600 has a second connecting hole relative to the weight reduction groove. The locking device also includes four second connecting blocks 700 and four second screws 800. The second connecting blocks 700 are arranged one-to-one with the weight reduction groove and are slidably embedded in the weight reduction groove. The second connecting blocks 700 have a second threaded hole. The threaded end of the second screw 800 passes through the second connecting hole and is threadedly connected to the second threaded hole.

[0046] A detachable structure is formed by the second connecting block 700, the second connecting hole and the second screw 800, so that the second connecting sleeve 600 can be detachably connected to the connecting body 300.

[0047] Furthermore, the second connecting sleeve 600 can also adjust the position of the second lock body 500 relative to the connecting body 300.

[0048] This embodiment also provides a fixing device for a water hose bridge assembly trolley 200, including: a carriage frame 100 and at least one locking device. The carriage frame 100 has an internal cavity for accommodating at least two trolleys 200. The bottom inner wall of the cavity has a plurality of first fixing holes 110, which are spaced apart along their length. At least two trolleys 200 abut against each other along the length of the cavity and are arranged sequentially. The first trolley 200 abuts against the inner side wall of the cavity. A connecting body 300 is connected to the trolley 200 located at the rear. A first lock body 410 is disposed opposite to the first fixing hole 110 and slidably connected to one end of the connecting body 300. An elastic part 420 is connected to the first lock body 410 and the connecting body 300 and is used to push the first lock body 410 into the first fixing hole 110 to restrict the movement of the trolley 200 relative to the carriage frame 100.

[0049] To facilitate the transfer of the hose bridge assembly, it is usually secured to the trolley 200 using straps. Then, multiple trolleys are arranged in sequence and abut against each other within the receiving cavity of the carriage frame 100. The connector 300 can restrict the movement of the outermost trolley 200 relative to the carriage frame 100, and ensure that at least two abutting and sequentially arranged trolleys 200 are locked within the receiving cavity. When using or storing the trolley, only the outermost trolley 200 needs to be released or locked.

[0050] To better understand this utility model, the following is combined with... Figures 1 to 6 The technical solution of this utility model is described in detail below: The connector 300 is connected to one of at least two trolleys 200. The first lock body 410 is disposed opposite to the first fixing hole 110 on the carriage frame 100 and is slidably connected to the connector 300. Under the elastic restoring force of the elastic part 420, the first lock body 410 can be inserted into the first fixing hole 110, so that at least two trolleys 200 abutting each other abut against the inner wall of the receiving cavity of the carriage frame 100 and the connector 300 respectively, thereby restricting the movement of the trolleys 200 relative to the carriage frame 100. Compared to existing technologies, the connector 300 is connected to the trolley 200 located at the rear, and a detachable connection structure is formed between the connector 300 and the bottom inner wall of the receiving cavity via the first locking body 410 and the elastic part 420. This allows the connector 300 to restrict the movement of the outermost trolley 200 relative to the carriage frame 100, and ensures that at least two trolleys 200 that abut against each other and are arranged in sequence are locked in the receiving cavity. When taking out and storing the trolley, only the outermost trolley 200 needs to be released or locked, which is convenient to operate and saves the cost of the locking structure.

[0051] In the specific working process of this utility model, when in use, the user places multiple trolleys 200 sequentially and abutting against each other into the receiving cavity of the carriage frame 100, so that the innermost trolley 200 abuts against the inner wall of the receiving cavity. Then, the user inserts the second lock body 500 into the second fixing hole 120, and then pulls the slide rod 450 so that the first lock body 410 slides into the first connecting sleeve 430. The user abuts the connecting body 300 against the outermost trolley 200, so that the first lock body 410 is aligned with the first fixing hole 110. Finally, the user releases the slide rod 450, and under the action of the elastic part 420, the first lock body 410 automatically inserts into the first fixing hole 110, thus limiting the multiple trolleys 200.

[0052] This embodiment, through the above structure, can solve the technical problem in the prior art where fixing multiple fire truck accessory trolleys 200 inside the truck compartment requires fixing each individual trolley 200, resulting in inconvenience in retrieval and storage.

[0053] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A locking device disposed on a connecting carriage frame, the carriage frame having an internal cavity for accommodating at least two trolleys, the inner bottom wall of the cavity having a plurality of first fixing holes spaced apart along its length, at least two trolleys abutting against each other along the length of the cavity and arranged sequentially, the first trolley abutting against the inner sidewall of the cavity, characterized in that, include: A connector is attached to the trolley located at the rear. as well as The elastic locking member includes a first locking body and an elastic part. The first locking body is disposed opposite to the first fixing hole and slidably connected to one end of the connecting body. The elastic part is connected to the first locking body and the connecting body and is used to push the first locking body into the first fixing hole to restrict the movement of at least two of the trolleys relative to the carriage frame.

2. The locking device of claim 1, wherein The elastic snap-fit ​​component further includes a first connecting sleeve, which is hollow inside. One end of the first connecting sleeve is detachably connected to one end of the connecting body, and the other end has a slot for connecting to its interior. The first lock body is placed inside the first connecting sleeve, and one end of the first lock body slides through the slot and is inserted into the first fixing hole. One end of the elastic part is connected to the connecting body, and the other end is connected to the other end of the first lock body.

3. The locking device of claim 2, wherein One end of the connector is provided with a first guide hole, and the elastic snap-fit ​​component also includes a guide rod, one end of which is connected to the first lock body and the other end is slidably inserted into the first guide hole.

4. The locking device of claim 2, wherein The first connecting sleeve also has a sliding groove communicating with its interior. The elastic snap-fit ​​component also includes a sliding rod, one end of which passes through the sliding groove and is connected to the first lock body, and the other end is placed outside the first connecting sleeve.

5. The locking device according to claim 2, characterized in that, The connector has weight-reducing grooves around its perimeter. The first connecting sleeve has a first connecting hole relative to the weight-reducing groove. The elastic snap-fit ​​component also includes four first connecting blocks and four first screws. The first connecting blocks are arranged one-to-one with the weight-reducing grooves and are slidably embedded in the weight-reducing grooves. The first connecting blocks have first threaded holes. The threaded end of the first screw passes through the first connecting hole and is threadedly connected to the first threaded hole.

6. The locking device according to claim 5, characterized in that, The top inner wall of the receiving cavity has a second fixing hole opposite to the first fixing hole. The locking device also includes a second lock body, which is inserted into the second fixing hole. The connecting body abuts against the trolley located at the rear, and the first lock body is detachably connected to the first fixing hole to restrict the trolley from sliding relative to the carriage frame.

7. The locking device according to claim 6, characterized in that, The other end of the connector is provided with a second guide hole. The second lock body has a large diameter section and a small diameter section. The large diameter section of the second lock body is inserted into the second guide hole. The locking device also includes a second connecting sleeve. The second connecting sleeve is detachably fitted onto the other end of the connector and has a through hole relative to the second guide hole to allow the small diameter section of the second lock body to pass through.

8. The locking device according to claim 7, characterized in that, The second connecting sleeve has a second connecting hole relative to the weight reduction groove. The locking device also includes four second connecting blocks and four second screws. The second connecting blocks are arranged one-to-one with the weight reduction groove and are slidably embedded in the weight reduction groove. The second connecting block has a second threaded hole. The threaded end of the second screw passes through the second connecting hole and is threadedly connected to the second threaded hole.

9. The locking device according to claim 1, characterized in that, The first lock body has a spherical connecting end relative to the first fixing hole.

10. A water hose bridge assembly trolley fixing device, characterized in that, include: The carriage frame and at least one locking device as described in any one of claims 1-9, wherein the carriage frame has an internal cavity for accommodating at least two trolleys, the bottom inner wall of the cavity has a plurality of first fixing holes spaced apart along its length, at least two trolleys abutting each other along the length of the cavity and arranged sequentially, with the first trolley abutting against the inner side wall of the cavity, a connecting body connecting to the last trolley, a first lock body disposed opposite the first fixing hole and slidably connected to one end of the connecting body, and an elastic part connected to the first lock body and the connecting body for pushing the first lock body into the first fixing hole to restrict the movement of the trolley relative to the carriage frame.

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