Front lifting hook fixing device and crane

Abstract

The utility model discloses a front lifting hook fixing device and a crane, and the device comprises a connecting base which is used for being connected with a frame; the circular pipe fitting is fixedly connected to the connecting base; the first end of the connecting support is rotationally connected with the circular pipe fitting, and the second end of the connecting support is connected with a first clamping groove; and the second clamping groove can be connected with the first clamping groove through a connecting piece to form a hoop structure, and the second clamping groove is used for locking and fixing the neck of the lifting hook. The connecting support can be quickly connected with a frame, the lifting hook is locked and limited in a clamping groove mode, the height of the connecting support can be adjusted through rotary connection of the circular pipe fitting, and the limiting block is installed in a limiting opening of the circular pipe fitting, so that excessive adjustment is prevented, and safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wheel crane, concretely relates to a front lifting hook fixing device and crane. BACKGROUND

[0002] The lifting hook fixing device is one of the key components of the wheel crane chassis, and the wheel crane uses the lifting hook to hoist heavy objects during operation. After the operation is completed, the lifting hook needs to be retracted and fixed on the vehicle frame by the lifting hook fixing device. The lifting hook must be fixed securely to prevent the lifting hook from changing position randomly during the travel of the crane, which may cause safety accidents. The traditional lifting hook fixing device has the problems of long installation and fixing time or poor safety.

[0003] The existing crane fixing device is mainly divided into two categories according to the placement position of the retracted lifting hook: one is hard connection fixing composed of a lifting hook locking mechanism, a chain and a hook seat placed on the vehicle frame, which is the most common placement method at present. This fixing method is safe and reliable, and is necessary for long-distance transfer. The other is soft connection fixing by a sling or a chain fixed in front of the driver.

[0004] The existing technology has the following defects: the hard connection fixing of the existing technology is reliable, but the hook placement and fixing process is complex and the operation time is long. It is difficult for a single person to complete the operation, and two people are needed to cooperate, which increases the labor cost. For some short-distance transfer, the process of fixing the lifting hook on the vehicle frame every time is complex and tedious, which seriously affects the work efficiency. The soft connection fixing (sling fixing) of the existing technology is fast, but the lifting hook is easy to swing during the transfer travel, which poses a risk of collision with surrounding objects. Moreover, the lifting hook needs to be shaken when the hook is hung, which makes the lifting hook swing near the sling. At this time, the hook is easy to pinch the hand and hit the head, which is extremely dangerous. For long-distance transfer or short-distance transfer with poor road conditions, the use of the lifting hook fixed by the sling is dangerous due to the high risk of lifting hook swinging, which violates the principle of road travel safety. CONTENT OF THE UTILITY MODEL

[0005] Objective: In view of at least one of the above technical problems, the utility model provides a front lifting hook fixing device and crane, which can be quickly fixed and installed securely in various working environments, effectively solving the problems of complex process and low efficiency of the existing lifting hook fixing device hard connection fixed on the vehicle frame, and eliminating the risk of collision with the cab when the existing lifting hook fixing device is soft connection fixed in front of the vehicle frame.

[0006] Technical scheme: In order to solve the above technical problems, the utility model adopts the technical scheme that:

[0007] In the first aspect, the utility model provides a front lifting hook fixing device, which comprises: a connecting base connected with the vehicle frame;

[0008] A circular pipe is fixedly connected to the connecting base;

[0009] A connecting support is rotatably connected to the first end of the circular pipe, and the second end of the connecting support is connected to a first clamping groove;

[0010] The second clamping groove can be connected to the first clamping groove through a connecting piece to form a clamping structure, and is used for locking and fixing the neck of the lifting hook.

[0011] Further, the connecting support has a triangular frame structure, including a first side connecting rod, a second side connecting rod, and a limiting block, which is fixedly connected to the outer periphery of the first end of the first side connecting rod and the second side connecting rod;

[0012] The circular pipe is provided with a limiting opening, and the limiting block is limitingly installed in the limiting opening, and is used for limiting the rotation angle of the connecting support relative to the circular pipe.

[0013] Further, the limiting opening has a square structure, and the limiting block has a cylindrical structure, the length of the limiting block is less than the length of the limiting opening, and the diameter of the limiting block is less than the width of the limiting opening.

[0014] Further, the connecting support further includes a connecting block, the second ends of the first side connecting rod and the second side connecting rod are fixedly connected to the connecting block, and the first clamping groove is fixedly connected to the connecting block.

[0015] Further, the first clamping groove includes a first limiting bent plate and two first connecting ears connected to the outer periphery of the two ends of the first limiting bent plate, and the second clamping groove includes a second limiting bent plate and two second connecting ears connected to the outer periphery of the two ends of the second limiting bent plate; the connecting holes are arranged at corresponding positions on the first connecting ears and the second connecting ears;

[0016] When the second clamping groove is connected to the first clamping groove, the two ends of the second limiting bent plate and the first limiting bent plate are butted to form a clamping structure, the connecting holes on the first connecting ears and the second connecting ears are axially aligned, and the connecting piece is inserted into the connecting holes on the corresponding side of the first connecting ears and the second connecting ears to fix the second limiting bent plate and the first limiting bent plate together.

[0017] Further, the connecting piece is a pin shaft.

[0018] Further, the shaft portion of the pin shaft is provided with a limiting hole for inserting an opening pin to prevent the pin shaft from axially moving and falling out of the connecting hole.

[0019] Further, the connecting base is provided with a pin shaft hole for fixing the front lifting hook fixing device to the front of the vehicle frame by fixing the pin shaft.

[0020] In a second aspect, the utility model provides a kind of crane, including the front lifting hook fixing device of first aspect, the front lifting hook fixing device is installed in the front of vehicle frame.Further, the front lifting hook fixing device is connected in the front of vehicle frame by connecting base, the first clamping slot is clamped in the neck of lifting hook after being connected with second clamping slot.

[0021] Beneficial effect: the utility model provides a kind of front lifting hook fixing device and crane, with following advantages: it can be connected quickly with vehicle frame by pin shaft, and the form of clamping slot is used to lock and limit lifting hook, the height of connecting support can be adjusted by the rotary connection of circular pipe, and limiting block is installed in the limiting opening of circular pipe, to prevent excessive adjustment to ensure safety.Lifting hook is fixed on vehicle frame firmly, and it has the advantages of being quickly disassembled at the front end of vehicle frame, and the risk of existing use of binding hook easily clamping hand is eliminated, so that lifting hook is more simple, efficient and safe to take and place. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structural schematic view of the front lifting hook fixing device of the embodiment installed on crane;

[0023] Figure 2 It is the structural schematic view of the front lifting hook fixing device of the embodiment;

[0024] Figure 3 It is the structural schematic view of the rotation of connecting support relative to circular pipe in the embodiment;

[0025] Figure 4 It is one kind of structural schematic view of pin shaft in the embodiment;

[0026] Figure 5 It is another structural schematic view of pin shaft in the embodiment;

[0027] In the drawing: vehicle frame 1, lifting hook 3, steel wire rope 6, connecting seat 8, fixed pin shaft 9, lifting hook fixing device 10;

[0028] Connecting support 101, split pin 102, pin shaft 103, limiting hole 1031, second clamping slot 104;

[0029] Connecting base 1011, limiting block 1012, circular pipe 1013, limiting opening 10131, first side connecting rod 1014, connecting block 1015, first limiting bent plate 1016, first connecting lug 1017, second side connecting rod 1018;Second limiting bent plate 1041, second connecting lug 1042. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0031] The technical terms used in this application are defined as follows:

[0032] Crane hook: It usually consists of four parts: suspension device, crossbeam, lifting tool and hook block. It is a device for lifting heavy objects.

[0033] Crane hook fixing device: A device that is connected to or placed on the vehicle frame to restrict the crane hook and prevent it from moving too much.

[0034] Rigid connection: A connection method made of rigid materials such as steel pipes and iron parts, used for traction or fixation.

[0035] Flexible connection: A connection method made using soft materials such as steel ropes and slings for traction or fixation.

[0036] In this embodiment, the front-mounted lifting hook fixing device is installed at the front end of the crane frame, such as... Figures 1 to 2 As shown, a front-mounted lifting hook fixing device includes:

[0037] Connecting base 1011 is used to connect to frame 1;

[0038] A circular tube 1013 is fixedly connected to the connecting base 1011;

[0039] The connecting bracket 101 has a first end that is rotatably connected to the circular tube 1013, and a second end that is connected to a first slot.

[0040] The second slot can be connected to the first slot via a connector to form a clamp structure, which is used to lock and fix the neck of the lifting hook 3.

[0041] In some embodiments, such as Figure 2 As shown, the connecting bracket 101 has a triangular frame structure, including a first side connecting rod 1014, a second side connecting rod 1018, and a limiting block 1012. The limiting block 1012 is relatively fixedly connected to the outer periphery of the first end of the first side connecting rod 1014 and the second side connecting rod 1018.

[0042] The circular tube 1013 has a limiting opening 10131, and the limiting block 1012 is installed in the limiting opening to limit the rotation angle of the connecting bracket relative to the circular tube 1013 in the circumferential direction. In this embodiment, the limiting block 1012 can also limit the axial movement of the circular tube 1013.

[0043] It should be noted that the limiting block 1012, the circular pipe 1013, the first side connecting bracket 1014 and the second side connecting bracket 1018 in this embodiment form a rotating adjustable shaft sleeve structure, and the limiting block 1012 limits the rotation angle of the connecting bracket 101 relative to the circular pipe 1013; Figure 3 When the connecting bracket 101 is rotated from the solid line position to the dashed line position, the limiting block 1012 is also rotated to the position of the limiting opening edge of the circular pipe 1013, and the limiting block is blocked by the limiting opening edge of the circular pipe 1013 to stop rotating, thereby preventing excessive rotation and collision with the cab. At the same time, the connecting bracket 101 rotates relative to the circular pipe, and the height of the first limiting bent plate 1016 also rises, so that the device has an adjusting function and can easily solve the problem of difficult fixation due to the difference in the stopping position of the lifting hook. The first side connecting bracket 1014 and the second side connecting bracket 1018 are assembled with the circular pipe 1013, and the first side connecting bracket 1014, the second side connecting bracket 1018 and the limiting block 1012 can be welded.

[0044] In some embodiments, as shown in Figure 2 the limiting opening 10131 is a square structure, and the limiting block 1012 is a cylindrical structure. The length of the limiting block 1012 is less than the length of the limiting opening, and the diameter of the limiting block 1012 is less than the width of the limiting opening.

[0045] In some embodiments, as shown in Figure 2 the connecting bracket 101 further includes a connecting block 1015, and the second ends of the first side connecting rod 1014 and the second side connecting rod 1018 are fixedly connected to the connecting block 1015. The first clamping groove is fixedly connected to the connecting block 1015.

[0046] The connecting bracket 101 is a core component of the front-mounted lifting hook fixing device, which is responsible for connecting the vehicle frame 1 and the lifting hook 3, and cooperates with the circular pipe 1013 to bear external loads and resist the swinging of the lifting hook in the front-rear and left-right directions of the vehicle. The first side connecting bracket 1014 and the second side connecting bracket 1018 directly bear tensile, compressive and bending torsional loads, and different strength circular steels or steel pipes can be used according to the actual load condition. The circular pipe 1013 can also be a circular steel pipe.

[0047] In some embodiments, as shown in Figure 2 the first clamping groove includes a first limiting bent plate 1016 and two first connecting ears 1017 connected to the outer periphery of both ends of the first limiting bent plate 1016, and the second clamping groove includes a second limiting bent plate 1041 and two second connecting ears 1042 connected to the outer periphery of both ends of the second limiting bent plate 1041. Connection holes are arranged at corresponding positions on the first connecting ears 1017 and the second connecting ears 1042.

[0048] When the second clamping groove is connected with the first clamping groove, the two ends of the second limiting bent plate 1041 and the first limiting bent plate 1016 are butted to form a clamping structure, the connecting holes on the first connecting lug 1017 and the second connecting lug 1042 are axially aligned, and the connecting piece is inserted into the connecting holes on the first connecting lug 1017 and the second connecting lug 1042 on the corresponding side at the same time, so as to fix the second limiting bent plate 1041 and the first limiting bent plate 1016 together.

[0049] The second clamping groove and the first clamping groove jointly form a clamping structure for fixing the lifting hook. Further, the first limiting bent plate 1016 and the two first connecting lugs 1017 are connected by welding, and the second limiting bent plate 1041 and the two second connecting lugs 1042 are connected by welding.

[0050] The connecting piece plays a role of locking and fixing the lifting hook 3. In the embodiment, the connecting piece is a pin shaft 103. In the embodiment, the structure of the pin shaft 103 is as shown in Figure 4 In another embodiment, the connecting piece can also be a pin shaft with a handle according to the actual use condition, which is convenient for holding and disassembling, as shown in Figure 5

[0051] In some embodiments, the shaft portion of the pin shaft 103 is radially provided with a limiting hole 1031 for inserting the split pin 102, so as to prevent the pin shaft 103 from axially moving and falling out of the connecting hole.

[0052] In some embodiments, the connecting base 1011 is provided with a pin shaft hole for connecting the front lifting hook fixing device to the front of the vehicle frame 1 by the fixing pin shaft 9.

[0053] Embodiment 2: as shown in Figure 1 The embodiment provides a crane, which comprises the front lifting hook fixing device according to any one of the embodiments 1.

[0054] As shown in Figure 1 The front lifting hook fixing device 10 is connected to the front of the vehicle frame 1 through the connecting base 1011, and the first clamping groove and the second clamping groove are clamped at the neck of the lifting hook 3 after being connected.

[0055] ​Specifically, the front of the frame 1 is provided with a connecting seat 8, the connecting seat 8 is provided with a pin hole, and the pin hole on the connecting base 1011 is matched with the pin hole on the connecting seat 8, the pin hole on the connecting base 1011 is aligned with the pin hole on the connecting seat 8, then the fixed pin 9 is inserted into the pin holes on the connecting base 1011 and the connecting seat 8, and the front lifting hook fixing device 10 is connected in front of the frame 1. It should be noted that the lifting hook 3 is connected to the working arm of the crane through a pulley block and a steel wire rope 6. When the lifting hook 3 is collected and landed in front of the cab, the first clamping groove and the second clamping groove are clamped at the neck of the lifting hook 3, so that the locking and limiting of the lifting hook 3 can be realized, and the height adjustment of the connecting support 101 can be realized through the relative rotation of the connecting support 101 and the circular pipe 1013, and the limiting block can limit the rotation angle to prevent over-adjustment to ensure safety.

[0056] In summary, the front lifting hook fixing device has the following advantages:

[0057] 1. The hard connection fixing mode can adapt to various complex transfer road conditions and distances, and is fixed firmly.

[0058] 2. It has the advantages of being fixed on the frame firmly and being fixed on the front end of the frame capable of being quickly disassembled, and also eliminates the risk of easily pinching hands by using the existing binding hook, so that the taking and placing of the lifting hook is more simple, efficient and safe.

[0059] 3. The clamping mode of the hard connection fixing mode ensures that the hook head is stable and firm and does not shake, and the reliability and safety are greatly improved.

[0060] 4. The front lifting hook fixing device has a certain rotation adjustment angle, and can adapt to a large range of lifting hook suspension height deviation.

[0061] 5. It is suitable for various working conditions, can be quickly disassembled, and improves the transfer efficiency.

[0062] 6. It solves the distance limitation between the traditional lifting arm head and the cab, and realizes the goal of adapting different lifting arms with different numbers of arms and arm lengths to different chassis.

[0063] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the protection scope of the present application.

[0064] The above merely is the preferred implementation form of the present application, and it should be noted that for the ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A front-mounted lifting hook fixing device, characterized in that, include: Connecting base, used for connecting to the frame; A circular tubular fitting is fixedly connected to the connecting base. The connecting bracket has a first end that is rotatably connected to the circular tube, and a second end that is connected to a first slot. The second slot can be connected to the first slot via a connector to form a clamp structure, which is used to lock and fix the neck of the lifting hook.

2. The front-mounted lifting hook fixing device according to claim 1, characterized in that, The connecting bracket has a triangular frame structure, including a first side connecting rod, a second side connecting rod, and a limiting block. The limiting block is relatively fixedly connected to the outer periphery of the first end of the first side connecting rod and the second side connecting rod. The circular tube has a limiting opening, and the limiting block is installed in the limiting opening to limit the rotation angle of the connecting bracket relative to the circumference of the circular tube.

3. The front-mounted lifting hook fixing device according to claim 2, characterized in that, The limiting opening has a square structure, and the limiting block has a cylindrical structure. The length of the limiting block is less than the length of the limiting opening, and the diameter of the limiting block is less than the width of the limiting opening.

4. The front-mounted lifting hook fixing device according to claim 2, characterized in that, The connecting bracket further includes a connecting block, the second ends of the first side connecting rod and the second side connecting rod are fixedly connected to the connecting block, and the first slot is fixedly connected to the connecting block.

5. The front-mounted lifting hook fixing device according to claim 1, characterized in that, The first slot includes a first limiting bent plate and two first connecting ears connected to the outer periphery of both ends of the first limiting bent plate; the second slot includes a second limiting bent plate and two second connecting ears connected to the outer periphery of both ends of the second limiting bent plate; connecting holes are provided at corresponding positions on the first and second connecting ears. When the second slot is connected to the first slot, the two ends of the second limiting bent plate and the first limiting bent plate are joined to form a clamp structure. The connecting holes on the first connecting ear and the second connecting ear are axially aligned. The connecting piece is simultaneously inserted into the connecting holes on the corresponding sides of the first connecting ear and the second connecting ear to fix the second limiting bent plate together.

6. The front-mounted lifting hook fixing device according to claim 1 or 5, characterized in that, The connecting component is a pin.

7. The front-mounted lifting hook fixing device according to claim 6, characterized in that, The shaft portion of the pin has a radially opening for inserting a cotter pin, preventing the pin from axially shifting and falling out of the connection hole.

8. The front-mounted lifting hook fixing device according to claim 1, characterized in that, The connecting base is provided with a pin hole for connecting the front lifting hook fixing device to the front of the vehicle frame by fixing the pin.

9. A crane, characterized in that, Includes the front-mounted crane hook fixing device as described in any one of claims 1 to 8, wherein the front-mounted crane hook fixing device is installed at the front of the vehicle frame.

10. The crane according to claim 9, characterized in that, The front-mounted lifting hook fixing device is connected to the front of the vehicle frame via a connecting base, and the first slot and the second slot are connected and locked at the neck of the lifting hook.

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