Lifting appliance lock pin mechanism and reach stacker

Abstract

The utility model discloses a lifting appliance lockpin mechanism and reach stacker, the lockpin mechanism is arranged at the corner part of a lifting appliance frame body, the lockpin mechanism is characterized in that the lockpin mechanism is provided with a lockpin which is driven by a control pull rod to rotate, and the lockpin is provided with a first section, a second section and a third section which are connected in sequence and have unequal outer diameters; the control pull rod is connected with the lock pin through a connecting rod fixed to the second section, and the lock pin is driven to rotate by rotating the connecting rod. The connecting rod is arranged below the second section of the lock pin to reduce the vertical size of the lock pin mechanism; meanwhile, the opening and closing cover plate for overhauling the lock pin mechanism is additionally arranged on the frame body, so that the overall miniaturization of the mechanism is realized; on the other hand, the retainer with the joint face being the arc face is arranged between the lock pin and the fixing frame, the lock pin is endowed with the larger swing freedom degree, meanwhile, abrasion between mechanisms is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the fields of spreaders and reachstackers, and particularly to a spreader locking pin mechanism and a reachstacker. Background Art

[0002] Chinese Utility Model Publication No. CN203474217U discloses a spreader rotating pin mechanism. The rotating pin handle is placed at the top of the rotating pin, and the rotating pin handle has a rotating shaft protruding upward. Although this top-mounted layout structure is conducive to the rapid assembly between the rotating pin handle and the rotating pin, the top-mounted rotating pin handle occupies more upper space, which is not conducive to the miniaturization design of the locking pin.

[0003] On the other hand, there are manufacturing or installation tolerances in the position and size of the corner locking holes of the container. In the traditional locking pin mechanism, the swinging freedom degree of the locking pin is small, resulting in easy jamming, wear or even damage to the locking hole structure due to alignment deviation during the insertion of the locking pin. Especially during the collaborative operation of multiple locking pins, it is difficult for each locking pin to synchronously compensate for the tolerance, affecting the locking efficiency. Summary of the Utility Model

[0004] In order to achieve the above object, the technical solution adopted by the utility model is as follows:

[0005] A spreader locking pin mechanism, the locking pin mechanism is placed at the corner of the spreader frame body. The locking pin mechanism has a locking pin driven to rotate by a control pull rod. The locking pin has a first section, a second section and a third section which are connected in sequence and have unequal outer diameters; the control pull rod is connected to the locking pin through a connecting rod fixed on the second section, and the locking pin is driven to rotate by rotating the connecting rod.

[0006] In a preferred embodiment of the utility model, a fixing bracket is arranged on the spreader frame body, and the locking pin is rotatably arranged on the fixing bracket through a retainer.

[0007] In a preferred embodiment of the utility model, a movable cover plate is further arranged on the spreader frame body, and the locking pin mechanism is placed below the movable cover plate.

[0008] In a preferred embodiment of the utility model, the retainer has a fixing part also fixed on the fixing bracket and a rotating part sleeved on the third section, and the fixing part and the rotating part are rotatably engaged.

[0009] In a preferred embodiment of the utility model, the joint surface between the rotating part and the fixing part is an arc surface, and the arc surface enables the locking pin to have two rotating freedom degrees relative to the frame body.

[0010] In a preferred embodiment of the utility model, the locking pin is fixed by a nut sleeved on the first section in cooperation with the retainer.

[0011] In a preferred embodiment of the present utility model, a guide sleeve is sleeved on the outer periphery of the third section.

[0012] The reach stacker includes a spreader locking pin mechanism as described in any one of the above.

[0013] The beneficial effects of the present utility model are as follows:

[0014] For the spreader locking pin mechanism provided by the present utility model, the connecting rod is placed below the second section of the locking pin to reduce the vertical dimension of the locking pin mechanism. At the same time, an opening and closing cover plate for overhauling the locking pin mechanism is added to the frame body to realize the overall miniaturization of the mechanism. On the other hand, a retainer with an arc-shaped joint surface is arranged between the locking pin and the fixed frame, which gives the locking pin a greater swing freedom while reducing the wear between the mechanisms and improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below.

[0016] Figure 1 is a schematic diagram of a reach stacker.

[0017] Figure 2 is Figure 1 an enlarged schematic view of part A of

[0018] Figure 3 is a schematic cross-sectional view of the spreader locking pin mechanism.

[0019] Figure 4 is Figure 3 an enlarged schematic view of part B of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. The above description is for the convenience of describing the present utility model and simplifies the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] The singular forms "a", "the" and "said" used in the specification include the plural forms unless clearly specified. The terms "including", "comprising" and "containing" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features.

[0022] In the specification, when it is stated that one component is "on", "fixed" to, "connected" to, "joined" to, etc. another component, the component can be directly on, fixed to, connected to, joined to, or in contact with the other component, or there can be an intermediate component.

[0023] Exemplary embodiments of the present application will be described below with reference to the accompanying drawings. However, it should be understood that the present application can be presented in many different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments. In all the drawings, the same reference numerals represent the same or functionally identical components.

[0024] Figure 1 and Figure 2 Shown is a reach stacker and a locking pin mechanism provided on its spreader. When the reach stacker 1 grips a container through the spreader 20, it first locks the container with a plurality of locking pin mechanisms 30 on its frame 21 and then lifts the container upward. In order to adapt to the shape of the upper surface of the container, the frame 21 is designed to be rectangular, and the locking pin mechanisms 30 are arranged at the four corners of the frame 21.

[0025] Figure 3 Shown is the internal structure of the locking pin mechanism. The locking pin mechanism 30 includes a locking pin 31 that is driven by a control pull rod 35 to rotate to achieve locking. The locking pin 31 is successively divided into a first section 31a, a second section 31b, and a third section 31c with unequal outer diameters from top to bottom. Among them, the second section 31b is connected to the control pull rod 35 through a connecting rod 34. The connecting rod 34 converts the linear motion of the control pull rod 35 into a rotational motion to drive the locking pin 31 to rotate, so that when the end 31d of the locking pin 31 is in the container lock hole, it is driven to rotate to achieve locking with the container. A fixing bracket 36 for fixing the locking pin mechanism 30 is provided in the frame 21, and the locking pin 31 is rotatably arranged on the fixing bracket 36 through a retainer 33. A guide sleeve 32 is also provided on the outer periphery of the third section 31c to avoid frictional collision between the third section 31c and the frame 21.

[0026] An activity cover plate 39 is also provided on the frame 21. The activity cover plate 39 is specifically located above the locking pin mechanism 30 to facilitate the assembly and maintenance of the locking pin mechanism 30. A contact pin 38 for detecting whether the frame 21 and the container are correctly loaded is also provided on the lower side of the frame 21.

[0027] In some embodiments, a nut 37 is threadedly engaged with the outer periphery of the first section 31a. The nut 37 presses the connecting rod 34 downward and cooperates with the retainer 33 to fix the locking pin 31.

[0028] The outer diameters of the first section 31a, the second section 31b, and the third section 31c are not equal to each other. This unequal-diameter design is beneficial to the assembly between the locking pin mechanism 30 and the fixing bracket 36 within the housing 21. During assembly, the third section 31c is inserted into the retainer 33, then the second section 31b is connected to the connecting rod 34, and finally the nut 37 at the first section 31a is tightened.

[0029] With reference to Figure 4 , the retainer 33 includes a fixing component 33a fixed to the fixing bracket 36 and a rotating component 33b sleeved on the third section 31c. From the perspective of a longitudinal section, the joint surface between the rotating component 33b and the fixing component 33a is a spherical arc surface, which enables the rotating component 33b to have two rotational degrees of freedom relative to the fixing component 33a, that is, the locking pin 31 can achieve rotation and swing through the retainer 33. Since the locking pin mechanism 30 needs to have a certain degree of freedom to absorb the lock hole tolerance when inserted into the container lock hole, and the locking pin mechanism 30 also has to bear a large load during the transportation of the container, the rigid retainer 33 gives the locking pin 31 a certain swing amplitude, and also reduces the friction between the locking pin 31 and the housing 21 under high-load conditions through the spherical surface, reducing local stress concentration and improving the service life.

[0030] In some embodiments, the rotating component 33b and the locking pin 31 are also fixed by threads, and the rotating component 33b cooperates with the nut 37 to lock the locking pin 31 to the connecting rod 34.

Claims

1. A sling locking pin mechanism, the locking pin mechanism is placed at the corner of the sling frame body, characterized in that, The lock pin mechanism has a lock pin that is driven to rotate by a control pull rod. The lock pin has a first section, a second section, and a third section that are connected in sequence and have unequal outer diameters. The control pull rod is connected to the lock pin through a connecting rod fixed to the second section, and the lock pin is driven to rotate by rotating the connecting rod.

2. The sling locking pin mechanism according to claim 1, characterized in that, A fixing bracket is provided on the spreader frame body, and the lock pin is rotatably arranged on the fixing bracket through a retainer.

3. The sling locking pin mechanism according to claim 2, characterized in that, A movable cover plate is further provided on the spreader frame body, and the lock pin mechanism is placed below the movable cover plate.

4. The sling locking pin mechanism according to claim 2, wherein, The retainer has a fixing component that is also fixed to the fixing bracket and a rotating component sleeved on the third section. The fixing component and the rotating component are in rotational engagement.

5. The sling locking pin mechanism according to claim 4, characterized in that, The engaging surface between the rotating component and the fixing component is an arc surface, and the arc surface enables the lock pin to have two rotational degrees of freedom relative to the frame body.

6. The sling locking pin mechanism according to claim 2, characterized in that, The lock pin is fixed by a nut sleeved on the first section in cooperation with the retainer.

7. A sling locking pin mechanism according to any one of claims 1 to 6, characterized in that, A guide sleeve is sleeved on the outer periphery of the third section.

8. Reachstacker, characterized in that, It includes a spreader lock pin mechanism according to any one of claims 1 to 7.

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