Fire fighting truck, engineering machinery, boom structure and locking device

Abstract

The utility model provides a fire fighting truck, engineering machinery, a boom structure and a locking device.The locking device comprises a lock seat, a lock rod, a reset piece and an unlocking piece, a spring bolt is installed on the lock seat in a reciprocating sliding mode between a locking position and an unlocking position, the reset piece is arranged on the lock seat and connected with the spring bolt, and the reset piece is connected with the lock rod. The unlocking piece is configured to provide acting force for maintaining the locking position for the spring bolt, in the process that the second base piece gets close to the first base piece, the spring bolt is promoted to slide to the unlocking position through the lock rod, after the lock rod penetrates through the spring bolt, the spring bolt is promoted to slide to the locking position through the reset piece so that the lock rod can be locked to the spring bolt, and the unlocking piece is arranged on the lock seat and connected with the spring bolt. And the acting force is provided for the spring bolt to slide towards the unlocking position. According to the locking device, the locking device can be conveniently unlocked, the unlocking difficulty is reduced, and the locking device can be conveniently applied to the complex environment where the position is high and manual arrival is difficult.

Description

Technical Field

[0001] This application relates to locking technology, and more particularly to a fire truck, engineering machinery, boom structure, and locking device. Background Technology

[0002] A boom structure is installed on engineering machinery (such as cranes) and special vehicles (such as fire trucks). This boom structure includes a boom body and a movable boom. The movable boom can be raised and lowered relative to the boom body to perform high-altitude operations. After use, the movable boom is retracted into the boom body.

[0003] To more stably constrain the boom to the boom body, a locking structure has emerged in related technologies. This locking structure achieves the locking of the boom and the boom body by cooperating with a locking hook set on the boom and a locking tongue set on the boom body.

[0004] However, in this solution, when the boom is unlocked from the boom body, the drive lock hook needs to be manually separated from the locking tongue. Since the boom structure is generally set on the top of construction machinery or special vehicles, this manual unlocking method increases the difficulty of unlocking and is not conducive to the unlocking by the staff. Utility Model Content

[0005] This application provides a locking device that is easy to unlock.

[0006] In a first aspect, embodiments of this application provide a locking device for locking or unlocking a first base member and a second base member, comprising: a lock seat for mounting on the first base member; a lock bar for mounting on the second base member; a lock tongue for reciprocatingly sliding between a locked position and an unlocked position on the lock seat; and a reset member disposed on the lock seat and connected to the lock tongue, configured such that the lock tongue provides a force to maintain the locked position. The locking device is configured such that, as the second base member approaches the first base member, the lock bar causes the lock tongue to slide to the unlocked position, and after the lock bar passes through the lock tongue, the reset member causes the lock tongue to slide to the locked position to lock the lock bar to the lock tongue. The locking device further comprises: an unlocking member disposed on the lock seat and connected to the lock tongue, configured such that the lock tongue provides a sliding force toward the unlocked position.

[0007] In one possible implementation, the interior of the lock seat defines a locking track for the bolt to slide.

[0008] In one possible implementation, the lock seat has a sliding hole that connects the lock track to the outside of the lock seat; and the unlocking component further includes: a driving part fixed to the lock housing, the driving part having a push rod configured to extend and retract along the sliding direction of the bolt; and a connecting part passing through the sliding hole and connecting the push rod and the bolt.

[0009] In one possible implementation, the drive unit is configured as a power cylinder.

[0010] In one possible implementation, the latch has an inclined wall configured to extend obliquely along the direction from the unlocked position to the locked position and in a direction close to the first base member.

[0011] In one possible implementation, the locking device further includes: a lock housing fixed to a first base member, the lock housing defining an installation space; and a lock seat rotatably mounted in the installation space.

[0012] In one possible implementation, the locking device further includes: at least one pulling part, the at least one pulling part being disposed in the mounting space, each pulling part being disposed between the inner wall of the mounting space near the first base member and the lock seat, to pull the lock seat.

[0013] In one possible implementation, the locking device further includes a position detection unit disposed on the lock seat and configured to detect the position of the bolt.

[0014] Secondly, embodiments of this application provide a boom structure, including: a boom body; a movable arm movably connected to the boom body; and a locking device of any of the above, wherein the locking device is disposed between the boom body and the movable arm, wherein the boom body is configured as a first base member and the movable arm is configured as a second base member.

[0015] Thirdly, embodiments of this application provide an engineering machinery, including the boom structure described above.

[0016] Fourthly, embodiments of this application provide a fire truck, including the boom structure described above.

[0017] The locking device provided in this application embodiment has a locking tongue that is reciprocally slidably mounted on a lock seat between a locked position and an unlocked position. A reset member is disposed on the lock seat and connected to the locking tongue. As the second base member approaches the first base member, the locking rod abuts against the locking tongue in the locked position, causing the locking tongue to slide to the unlocked position, and the locking rod passes through the locking tongue. After the locking rod passes through the locking tongue, the locking rod separates from the locking tongue, and the reset member causes the locking tongue to slide to the locked position, thereby locking the locking rod to the locking tongue. The unlocking member is disposed on the lock seat and connected to the locking tongue. When unlocking is required, the unlocking member can be controlled to apply a sliding force to the locking tongue toward the unlocked position, thereby unlocking the second base member. By designing the unlocking member, the locking device can be easily unlocked, reducing the difficulty of unlocking, which is beneficial for the application of this locking device in complex environments where the location is high and difficult for humans to reach. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] Figure 1 A cross-section of the locking device in one embodiment of this application. Figure 1 ;

[0020] Figure 2 A cross-section of the locking device in one embodiment of this application. Figure 2 ;

[0021] Figure 3 A cross-section of the locking device in one embodiment of this application. Figure 3 ;

[0022] Figure 4 A cross-section of the locking device in one embodiment of this application. Figure 4 ;

[0023] Figure 5 This is a schematic diagram of the boom structure in one embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Boom body; 20. Movable boom; 100. First base component; 200. Second base component; 300. Locking device; 310. Lock seat; 312. Lock track; 314. Sliding hole; 320. Locking rod; 330. Locking tongue; 332. Inclined wall; 340. Reset component; 350. Unlocking component; 352. Drive unit; 352a. Push rod; 354. Connecting part; 360. Lock housing; 362. Installation space; 364. Protective part; 366. Support platform; 370. Pulling part; 380. Position detection part; 390. Connecting frame.

[0026] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0027] A boom structure is installed on engineering machinery (such as cranes) and special vehicles (such as fire trucks). This boom structure includes a boom body and a movable boom. The movable boom can be raised and lowered relative to the boom body to perform high-altitude operations. After use, the movable boom is retracted into the boom body.

[0028] To more stably constrain the boom to the boom body, a locking structure has emerged in related technologies. This locking structure achieves the locking of the boom and the boom body by cooperating with a locking hook set on the boom and a locking tongue set on the boom body.

[0029] However, in this solution, when the boom is unlocked from the boom body, the drive lock hook needs to be manually separated from the locking tongue. Since the boom structure is generally set on the top of construction machinery or special vehicles, this manual unlocking method increases the difficulty of unlocking and is not conducive to the unlocking by the staff.

[0030] Based on this, this application provides a locking device that is easy to unlock. The unlocking component applies a sliding force to the bolt towards the unlocking position to achieve unlocking, thereby reducing the difficulty of unlocking. This makes it easier for the locking device to be used in complex environments that are high up and difficult for people to reach.

[0031] The following is combined Figures 1 to 4 The locking device 300 of the present application is described. In some embodiments, the locking device 300 can be used to lock or unlock the first base 100 and the second base 200. The locking device 300 may include a lock seat 310, a lock bar 320, a lock tongue 330 and a reset member 340.

[0032] A lock base 310 is mounted on a first base 100. A lock lever 320 is mounted on a second base 200. A latch 330 is slidably mounted on the lock base 310 between a locked position and an unlocked position. A reset member 340 is disposed on the lock base 310 and connected to the latch 330, configured such that the latch 330 provides a force to maintain the lock position.

[0033] As the second base member 200 approaches the first base member 100, the locking rod 320 abuts against the locking tongue 330 in the locked position, causing the locking tongue 330 to slide to the unlocked position so that the locking rod 320 passes through the locking tongue 330; after the locking rod 320 passes through the locking tongue 330, the locking rod 320 separates from the locking tongue 330, and the reset member 340 causes the locking tongue 330 to slide to the locked position so as to lock the locking rod 320 to the locking tongue 330.

[0034] It should be noted that the movement of the second base member 200 toward the first base member 100 is not particularly limited. That is, the locking device 300 in this embodiment can be applied to scenarios where the second base member 200 approaches the first base member 100 in a straight line or in a curved direction.

[0035] In some specific embodiments, the reset element 340 may be a compression spring.

[0036] In this embodiment, since the lock seat 310 is used to fix to the first base member 100, the lock bar 320 is used to fix to the second base member 200, and the lock tongue 330 can be slidably installed on the lock seat 310 between the unlocked position and the locked position.

[0037] See Figure 1When the locking lever 320 is not in contact with the locking tongue 330, the locking tongue 330 is in the locked position with the support of the reset member 340 (at this time the reset member 340 can be in a naturally extended state), and the locking tongue 330 is opposite to the locking lever 320.

[0038] See Figure 2 and Figure 3 As the second base member 200 approaches the first base member 100, the locking rod 320 contacts the locking tongue 330, and the locking rod 320 presses against the locking tongue 330. This pressing force has a component force that causes the locking tongue 330 to slide towards the unlocked position. Under the action of this component force, the locking tongue 330 gradually slides to the unlocked position. When the locking tongue 330 is in the unlocked position, the locking tongue 330 and the locking rod 320 are misaligned. At this time, the reset member 340 is in a compressed state and generates a restoring force.

[0039] See Figure 4 When the latch 330 is in the unlocked position, the second base member 200 continues to move closer to the first base member 100, causing the locking rod 320 to pass through the latch 330. After the locking rod 320 passes through the latch 330, the locking rod 320 separates from the latch 330, the locking rod 320 is released from the compressive force, and under the restoring force of the reset member 340, the latch 330 returns to the locked position. In this way, the locking rod 320 is locked to the latch 330, thereby locking the second base member 200 to the first base member 100.

[0040] Furthermore, the locking device 300 may also include an unlocking member 350. The unlocking member 350 is disposed on the lock base 310 and connected to the bolt 330, configured such that the bolt 330 provides a sliding force toward the unlocked position.

[0041] When unlocking is required, the unlocking component 350 can be controlled to apply a sliding force to the latch 330 toward the unlocked position. Even if the latch 330 and the locking bar 320 are misaligned, the locking bar 320 is not obstructed by the latch 330, allowing the locking bar 320 to pass through the latch 330, thereby unlocking the second base member 200. During this process, the reset component 340 is in a compressed state and generates a restoring force.

[0042] After unlocking is complete and the second base member 200 is far away from the first base member 100, the unlocking member 350 can be controlled to remove the force. Under the restoring force of the reset member 340, the locking tongue 330 returns to the locked position, preparing for the next locking.

[0043] In this embodiment, by designing the unlocking component 350, the locking device 300 can be easily unlocked, reducing the difficulty of unlocking and making it easier for the locking device 300 to be used in complex environments that are high up and difficult for people to reach.

[0044] In some embodiments, the interior of the lock base 310 defines a lock track 312 for the sliding of the bolt 330, and the lock base 310 is provided with a sliding hole 314, which connects the lock track 312 with the exterior of the lock housing 360.

[0045] The unlocking component 350 may further include a drive portion 352 and a connecting portion 354. The drive portion 352 is fixed to the lock housing 360 and has a push rod 352a configured to extend and retract in a direction from the locked position to the unlocked position. The connecting portion 354 passes through the sliding hole 314 and connects the push rod 352a to the latch 330.

[0046] In this embodiment, the sliding hole 314 can be provided along the sliding direction of the latch 330. The connecting part 354 passes through the sliding hole 314 and connects the push rod 352a and the latch 330. When unlocking, the driving part 352 can control the push rod 352a to slide along the direction from the locked position to the unlocked position, and the push rod 352a drives the latch 330 to slide from the locked position to the unlocked position.

[0047] In some further embodiments, the drive unit 352 may also be configured as a power cylinder. A power cylinder is an actuator that converts hydraulic or pneumatic energy into mechanical energy and performs linear reciprocating motion. The piston rod of the power cylinder can then serve as a push rod 352a. During installation, the cylinder barrel of the power cylinder can be fixed to the lock seat 310 with fasteners, and the piston rod is arranged along the sliding direction of the locking tongue 330.

[0048] Since the power cylinder can directly provide linear motion force, compared with the scheme of using a motor to drive the push rod 352a for linear motion, the scheme of using the power cylinder can eliminate the need for a conversion mechanism to convert rotational force into linear force, which is simple and convenient.

[0049] In addition, the push rod 352a of the power cylinder can control the extension distance and extension speed by adjusting hydraulic or pneumatic pressure, which is simple and convenient, thus eliminating the need for a reduction gear.

[0050] In some embodiments, the interior of the lock base 310 defines a locking channel 312 for sliding of the bolt 330. The bolt 330 is slidably disposed in the locking channel 312.

[0051] Specifically, the locking channel 312 is open to one side. When in the locked position, a portion of the bolt 330 extends from the opening of the locking channel 312 to engage with the locking lever 320. When sliding from the locked position to the unlocked position, the bolt 330 slides inward toward the interior of the locking channel 312.

[0052] The reset element 340 can be a compression spring, which can be disposed in the lock channel 312. One end of the compression spring abuts against the inner wall of the lock channel 312 opposite to the opening, and the other end is connected to the latch 330 so as to cause the latch 330 to slide in the opening direction, that is, slide in the direction of the locked position.

[0053] The shape and size of the locking track 312 can be adapted to the locking tongue 330, so that the locking track 312 can also constrain the sliding trajectory of the locking tongue 330.

[0054] In some embodiments, the latch 330 has an inclined wall 332 configured to extend obliquely along the direction from the unlocked position to the locked position and in a direction close to the first base member 100.

[0055] When the bolt 330 is in the locked position, the inclined wall 332 is opposite to the locking bar 320. When the locking bar 320 abuts against the inclined wall 332, due to the inclination of the inclined wall 332, the pressing force of the locking bar 320 on the bolt 330 will inevitably have a component force that slides towards the unlocked position.

[0056] In some embodiments, the locking device 300 may further include a lock housing 360, which is fixed to the first base member 100 and defines an installation space 362. The lock seat 310 is rotatably mounted in the installation space 362.

[0057] In this embodiment, since the lock seat 310 is rotatably mounted in the installation space 362 and the lock tongue 330 is slidably disposed on the lock seat 310, the lock seat 310 can drive the lock tongue 330 to rotate. Thus, when the lock tongue 330 is locked with the lock rod 320 (i.e., when the second base 200 is locked with the first base 100), the second base 200 moves moderately away from or closer to the first base 100. In other words, after the lock seat 310 is rotatably mounted in the installation space 362, the force generated by the passive shaking of the second base 200 can be released, preventing damage to the lock tongue 330 or the lock rod 320.

[0058] Since the locking lever 320 needs to pass through the latch 330 and be locked by the latch 330 which has been reset to the locked position during the locking process, a certain distance needs to be reserved between the latch 330 and the first base member 100 to avoid the locking lever 320. And since the latch 330 is located on the lock seat 310, a certain distance also needs to be reserved between the lock seat 310 and the first base member 100. In this embodiment, the hinge point 10 of the lock housing 360 can be suspended within the mounting space 362 of the lock housing 360 to allow for the reserved distance between the latch 330 and the first base member 100. Specifically, the lock housing 360 can be provided with a support platform 366 within the mounting space 362.

[0059] Furthermore, the locking device 300 may also include at least one pulling part 370, which is disposed in the mounting space 362. Each pulling part 370 is disposed in the mounting space 362 near the inner wall of the first base member 100 and the lock seat 310 to pull the lock seat 310. This design allows the pulling part 370 to pull the lock seat 310, enabling the lock seat 310 to return to its original position, preventing unlocking difficulties caused by the lock seat 310 jamming, and making the structure more reliable.

[0060] Specifically, the pulling part 370 is a spring. One end of the spring is connected to the inner wall of the mounting space 362 near the first base member 100, and the other end is connected to the lock seat 310.

[0061] Furthermore, the locking device 300 may also include a protective portion 364 disposed on the side of the lock housing 360 facing the second base member 200. When the second base member 200 moves toward the first base member 100, the protective portion 364 cushions the second base member 200. Specifically, the protective portion 364 may be made of a soft, elastic material to cushion and protect the second base member 200.

[0062] In some embodiments, the locking device 300 may further include a connecting frame 390, one end of which is connected to the second base member 200. The locking rod 320 is fixed to the connecting frame 390.

[0063] In some embodiments, the locking device 300 may further include a position detection unit 380, which is disposed on the lock seat 310 and configured to detect the position of the bolt 330.

[0064] Specifically, the position detection unit 380 can be a position sensor. The position detector detects the position of the latch 330 so that the operator can determine the unlocked or locked state of the locking device 300 based on the position of the latch 330.

[0065] The following is through Figure 5 The structure and principle of the boom structure according to the embodiments of this application are described.

[0066] The boom structure of this application embodiment can be widely used in various engineering machinery (such as cranes) and various special vehicles (such as fire trucks). The boom structure may include a boom body 10 and a movable boom 20. The movable boom 20 can be used to mount working equipment (such as fire monitors or lifting platforms on fire trucks) or as part of such working equipment. The movable boom 20 is movably connected to the boom body 10 to achieve lifting and lowering relative to the boom body 10, thus allowing adjustment of the angle, height, etc., of the working equipment.

[0067] The movable boom 20 can move in various ways relative to the boom body 10. For example, the movable boom 20 can be vertically connected to the boom body 10; or, for another example, the movable boom 20 can be pivotally connected to the boom body 10, achieving a rotatable connection. After use, the movable boom 20 needs to be retracted onto the boom body 10 to facilitate the movement of construction machinery and special vehicles.

[0068] The boom structure may also include the locking device 300 in any of the above embodiments, which may be disposed between the boom body 10 and the movable boom 20. When the movable boom 20 is retracted onto the boom body 10, the locking device 300 can lock the boom body 10 and the movable boom 20 together, thus solving the problem of the movable boom 20 swaying and reducing the impact on the working equipment and instruments when the construction machinery or special vehicle is traveling on bumpy roads. When the movable boom 20 needs to be used, the locking device 300 can unlock the boom body 10 and the movable boom 20.

[0069] This application also provides an engineering machine that may include the boom structure in any of the above embodiments.

[0070] This application also provides a fire truck that may include the boom structure of any of the above embodiments.

[0071] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A locking device (300) for locking or unlocking a first base (100) and a second base (200), characterized in that, include: A lock base (310) is used for mounting on the first base member (100); Locking rod (320), said locking rod (320) is used to be mounted on the second base member (200); A locking tongue (330) is mounted on the lock seat (310) in a reciprocating sliding manner between a locked position and an unlocked position; A reset member (340) is disposed on the lock seat (310) and connected to the bolt (330), configured such that the bolt (330) provides a force to maintain the lock position; The locking device (300) is configured such that, as the second base (200) approaches the first base (100), the locking rod (320) causes the latch (330) to slide to the unlock position, and after the locking rod (320) passes through the latch (330), the reset member (340) causes the latch (330) to slide to the lock position, thereby locking the locking rod (320) to the latch (330). The locking device (300) further includes: An unlocking element (350) is disposed on the lock seat (310) and connected to the bolt (330), configured such that the bolt (330) provides a sliding force toward the unlocked position.

2. The locking device (300) according to claim 1, characterized in that, The interior of the lock seat (310) defines a locking channel (312) for the bolt (330) to slide.

3. The locking device (300) according to claim 2, characterized in that, The lock base (310) is provided with a sliding hole (314), which connects the lock channel (312) with the outside of the lock base (310); Furthermore, the unlocking component (350) also includes: A drive unit (352) is fixed to the lock seat (310). The drive unit (352) has a push rod (352a) configured to extend and retract along the sliding direction of the latch (330). A connecting part (354) passes through the sliding hole (314) and connects the push rod (352a) and the locking tongue (330).

4. The locking device (300) according to any one of claims 1 to 3, characterized in that, The latch (330) has an inclined wall (332) configured to extend obliquely along the direction from the unlock position to the locked position and in a direction close to the first base (100).

5. The locking device (300) according to any one of claims 1 to 3, characterized in that, Also includes: A lock housing (360) is fixed to the first base member (100), and an installation space (362) is defined within the lock housing (360); The lock base (310) is rotatably mounted in the mounting space (362).

6. The locking device (300) according to claim 5, characterized in that, Also includes: At least one pulling part (370) is disposed in the mounting space (362), and each pulling part (370) is disposed in the mounting space (362) between the inner wall of the first base (100) and the lock seat (310) to pull the lock seat (310).

7. The locking device (300) according to any one of claims 1 to 3, characterized in that, Also includes: A position detection unit (380) is disposed on the lock seat (310) and configured to detect the position of the bolt (330).

8. A boom structure, characterized in that, include: Boom body (10); A movable arm (20) is movably connected to the boom body (10); The locking device (300) according to any one of claims 1 to 7, the locking device (300) being disposed between the boom body (10) and the movable arm (20), wherein the boom body (10) is configured as the first base member (100) and the movable arm (20) is configured as the second base member (200).

9. An engineering machinery, characterized in that, Includes the boom structure according to claim 8.

10. A fire truck, characterized in that, Includes the boom structure according to claim 8.

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