Balancing weight limiting device and crane

Through the limiting mechanism of casing, telescopic tube and pressing rod, combined with the design of pins, bosses and grooves, the problems of inconvenient limiting of the crane weight and easy damage to the fixing bolts are solved, and the verticality of different quantities of balance weights is achieved The limit and operation are simple, reducing the risk of loss.

CN222293466UActive Publication Date: 2025-01-03XUZHOU HEAVY MASCH CO LTD
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Patent Information

Application Number
CN202420299322.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-02-18
Publication Date
2025-01-03
Estimated Expiration
2034-02-18

AI Technical Summary

Technical Problem

When carrying a counterweight, existing cranes are difficult to effectively limit the vertical direction, and the fixing bolts are inconvenient to operate, which are easy to damage and easily lost.

Method used

Using the limiting mechanism of casing, telescopic tube, compression rod and storage components, the expansion and contraction length can be adjusted and precisely matched through the fitting of the pin and the boss and groove, ensuring the limit of the balance weight, and quickly plugging and unplugging the pin. and store components to prevent loss.

Benefits of technology

The vertical limit for different quantities of balanced weights is achieved, which is easy to operate, reduces economic losses, and improves safety and limit accuracy.

✦ Generated by Eureka AI based on patent content.

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Abstract

The counterweight limiting device comprises a limiting mechanism, and the limiting mechanism comprises a sleeve, a telescopic pipe, a pressing rod, a plug pin and a storage assembly. A telescopic pipe is installed in an inner cavity of the sleeve, and the position of the telescopic pipe in the sleeve is limited through a plug pin. The pressing rod is sleeved with the telescopic pipe in a threaded mode. The storage assembly is installed on the outer surface of the sleeve, and a plug pin is arranged in the storage assembly. The sleeve, the telescopic pipe and the pressing rod are arranged and matched with one another so that the telescopic length can be adjusted, and the limiting requirements of different numbers of balancing weights can be met; meanwhile, the telescopic pipe is in threaded connection with the pressing rod, the length can be accurately matched, the balance weight is pressed, and limiting of the balance weight is ensured; the plug pin is stored through the storage assembly, so that the plug pin can be quickly inserted and pulled, and the operation is convenient; meanwhile, the bolt is prevented from being lost.
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Description

Technical Field

[0001] The utility model belongs to the technical field of cranes, and in particular relates to a counterweight limiting device and a crane. Background Art

[0002] Existing wheeled cranes often need to carry a counterweight when going out for operation. The counterweight is used to balance the load, ensure that the crane remains balanced during lifting, and prevent overturning.

[0003] Domestic cranes usually place the counterweight on the frame and use limit blocks to limit the horizontal direction, but do not limit the vertical direction of the counterweight. This leads to the risk of the counterweight being thrown up when the vehicle is carrying the counterweight and driving quickly over an undulating road surface. At the same time, the braking force generated during braking has a large impact on the limit blocks, which can easily cause damage to the limit blocks and increase economic costs. Foreign cranes often limit the throwing of the counterweight by directly fixing the counterweight to the frame with fixing bolts. This method requires the disassembly and assembly of the fixing bolts, which is not easy to operate. In addition, when the vehicle carries counterweights of different numbers, the length of the fixing bolts needs to be changed. The storage of standard parts such as fixing bolts after disassembly is also a problem, and improper storage can easily lead to loss.

[0004] Therefore, the problem to be solved urgently is to be able to limit the vertical direction of different numbers of counterweights, and to make the operation easy and convenient to prevent the loss of workpieces. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and to provide a counterweight limiting device and a crane, which are suitable for carrying different numbers of counterweights and can be quickly adjusted to prevent the loss of workpieces.

[0006] The utility model provides the following technical solutions:

[0007] In a first aspect, a counterweight limiting device is provided, comprising a limiting mechanism, wherein the limiting mechanism comprises a sleeve, a telescopic tube, a pressure rod, a latch and a storage assembly; the telescopic tube is installed in the inner cavity of the sleeve, and the position of the telescopic tube in the sleeve is limited by the latch; the pressure rod is threadedly sleeved on the inside of the telescopic tube; the storage assembly is installed on the outer surface of the sleeve, and the latch is provided in the storage assembly.

[0008] As a preferred technical solution of the utility model, the outer side surface of the sleeve is provided with a latch hole corresponding to the latch; the outer side surface of the telescopic tube is relatively provided with a fixing hole; the telescopic tube is fixed in the sleeve by the latch pin passing through the fixing hole and inserted into the latch hole.

[0009] As a preferred technical solution of the utility model, the inner surface of the sleeve is provided with a groove, and the groove includes an upper groove, a connecting groove and a lower groove; the upper groove is connected to the top of the sleeve, and the lower groove is connected to the bottom of the sleeve; the upper groove and the lower groove are connected by the connecting groove; the outer surface of the telescopic tube is provided with a boss that cooperates with the groove; the telescopic tube moves in the groove through the boss and then moves in the sleeve.

[0010] As a preferred technical solution of the utility model, a mounting seat is provided on the outer surface of the sleeve, and the storage assembly is installed on the mounting seat.

[0011] As a preferred technical solution of the utility model, a baffle is installed on the end of the storage component away from the sleeve by screws; a first slot, a transverse slot and a second slot are provided on the storage component; the first slot is located on the end of the storage component away from the sleeve; the second slot is located on the end of the storage component close to the sleeve; the first slot and the second slot are connected through the transverse slot.

[0012] As a preferred technical solution of the utility model, the latch includes a pin shaft and a handle; the pin shaft is installed in the cavity of the storage component; and the handle is clamped in the first slot hole or the second slot hole.

[0013] In a second aspect, a crane is provided, comprising the counterweight limiting device described in the first aspect.

[0014] As a preferred technical solution of the utility model, it also includes a lifting arm; a sleeve is fixedly connected below the lifting arm.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The counterweight limiting device provided by the utility model adopts a sleeve, a telescopic tube and a pressure rod, which cooperate with each other to adjust the telescopic length of the limiting mechanism to achieve the limiting requirements of different numbers of counterweights; and the telescopic tube and the pressure rod are threadedly connected, which can accurately match the length, press the counterweight tightly, and ensure the limiting of the counterweight.

[0017] 2. The counterweight limit device provided by the utility model adopts a storage assembly to store the latch, which can realize the rapid insertion and removal of the latch and facilitate the adjustment of the telescopic length of the limit mechanism; at the same time, it prevents the loss of the latch and reduces economic losses.

[0018] 3. The counterweight limit device provided by the utility model adopts a boss and a groove to cooperate with each other, which can prevent the telescopic tube from falling when the pin is pulled out, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a crane in an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the counterweight limiting device in the embodiment of the utility model;

[0021] Figure 3 It is a cross-sectional view of the sleeve in the embodiment of the utility model;

[0022] Figure 4 A top view of a sleeve in an embodiment of the utility model;

[0023] Figure 5 A side view of a sleeve in an embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the telescopic tube in the embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the fully extended state of the limiting mechanism in the embodiment of the utility model;

[0026] Figure 8 This is a schematic diagram of the fully retracted state of the limiting mechanism in the embodiment of the utility model;

[0027] Fig. 9 This is a schematic diagram of the structure of the storage assembly in the embodiment of the utility model;

[0028] Fig.10 This is a schematic diagram of the structure of the latch in the embodiment of the utility model;

[0029] Fig.11 It is a schematic diagram of the counterweight limiting device in the embodiment of the utility model pressing two counterweights;

[0030] Fig.12 It is a schematic diagram of the counterweight limiting device in the embodiment of the utility model pressing three counterweights.

[0031] The markings in the figure are: 1. limit mechanism; 2. lifting arm; 3. counterweight; 4. frame; 11. sleeve; 111. mounting seat; 112. latch hole; 113. groove; 12. telescopic tube; 121. boss; 122. fixing hole; 13. pressure rod; 14. latch; 141. pin shaft; 142. handle; 15. storage assembly; 151. screw; 152. baffle; 153. transverse groove; 154. first slot hole; 155. second slot hole. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0033] Example 1

[0034] This embodiment provides a counterweight limiting device, such as Figure 1 As shown, the counterweight limiting device is installed on the crane to press the counterweight 3 onto the frame 4.

[0035] like Figure 2 As shown, the counterweight limiting device includes a limiting mechanism 1. The limiting mechanism 1 includes a sleeve 11, a telescopic tube 12, a pressure rod 13, a latch 14 and a storage assembly 15. The number of the limiting mechanism 1, the sleeve 11, the telescopic tube 12, the pressure rod 13, the latch 14 and the storage assembly 15 can be adjusted according to actual conditions. The limiting device in this embodiment includes two limiting mechanisms 1. The sleeve 11, the telescopic tube 12 and the pressure rod 13 in the limiting mechanism 1 are each provided. Two storage assemblies 15 are provided, located at the upper and lower ends of the sleeve 11. Two latches 14 are also provided, respectively located in each storage assembly 15.

[0036] The telescopic tube 12 is installed in the inner cavity of the sleeve 11, and the position of the telescopic tube 12 in the sleeve 11 is limited by the latch 14. The telescopic tube 12 can be extended and retracted in the sleeve 11 by the latch 14, which is convenient and fast to operate, and the limiting device can be applied to different numbers of counterweights 3.

[0037] Specifically, Figure 3 and Figure 6 As shown, the outer side of the sleeve 11 is provided with a latch hole 112 corresponding to the latch 14, and the outer side of the telescopic tube 12 is oppositely provided with a fixing hole 122. The telescopic tube 12 is fixed in the sleeve 11 by inserting the latch hole 112 through the fixing hole 122 through the latch 14.

[0038] Furthermore, if Figure 3 , Figure 4 and Figure 6 As shown, the inner surface of the sleeve 11 is provided with a groove 113, and the groove 113 includes an upper groove, a connecting groove and a lower groove. The upper groove is connected to the top of the sleeve 11, and the lower groove is connected to the bottom of the sleeve 11. The upper groove and the lower groove are connected through the connecting groove. The outer surface of the telescopic tube 12 is provided with a boss 121 that matches the groove 113. The telescopic tube 12 moves in the groove 113 through the boss 121 and then moves in the sleeve 11.

[0039] Figure 7 The limiting mechanism 1 is in a fully extended state. Figure 8It is the fully retracted state of the limiting mechanism 1. When the telescopic tube 12 is adjusted from the fully retracted state to the fully extended state, first pull out the upper end pin 14, and the telescopic tube 12 moves downward along the upper groove. When the telescopic tube 12 moves to the connecting groove, the boss 121 will be stuck by the connecting groove, which can prevent the telescopic tube 12 from suddenly falling during the descent process and play a protective role. Insert the pin 14 at the lower end to complete the displacement of the telescopic tube 12 to the fully extended state. If the telescopic tube 12 needs to be removed, it needs to be rotated to the center angle corresponding to the connecting groove to the lower groove and pulled out through the lower groove. In this embodiment, the center angle corresponding to the connecting groove is 180°.

[0040] The compression rod 13 is threadedly sleeved inside the telescopic tube 12, and can achieve precise adjustment of the telescopic length through the thread, so that the limit device can press the balance middle-aged in the vertical direction. The storage component 15 is installed on the outer surface of the sleeve 11, and the latch 14 is arranged inside the storage component 15. The storage component 15 can realize the plugging, unplugging and storage functions of the latch 14, which is easy to operate and prevents the latch 14 from being lost.

[0041] Specifically, Figure 5 As shown, a mounting seat 111 is provided on the outer surface of the sleeve 11 , and the storage assembly 15 is installed on the mounting seat 111 .

[0042] Furthermore, if Fig. 9 As shown. A baffle 152 is installed on the end of the storage component 15 away from the sleeve 11 through a screw 151, and the baffle 152 can prevent the latch 14 from detaching from the storage component 15. The storage component 15 is provided with a first slot 154, a transverse slot 153, and a second slot 155. The first slot 154 is located at the end of the storage component 15 away from the sleeve 11, and the second slot 155 is located at the end of the storage component 15 close to the sleeve 11. The first slot 154 and the second slot 155 are connected through the transverse slot 153.

[0043] like Fig. 9 and Fig.10 As shown, the latch 14 includes a pin shaft 141 and a handle 142. The pin shaft 141 is installed in the cavity of the storage assembly 15. After the handle 142 moves in the transverse groove 153, it is locked in the first slot hole 154 or the second slot hole 155.

[0044] Furthermore, if the handle 142 is locked in the first slot 154, it indicates that the latch 14 is in the pulled-out state. If the handle 142 is locked in the second slot 155, it indicates that the latch 14 is in the inserted state. In this embodiment, the handle 142 is rotated 45° to disengage from the first slot 154 or the second slot 155, and then the handle 142 is pulled to move in the transverse slot 153, so as to drive the pin 141 to be pulled out or inserted.

[0045] The operation method of this embodiment is as follows: the required number of counterweights 3 are placed on the vehicle frame 4 and below the limit device. According to the number of counterweights 3, the latch 14 at the upper or lower end of the sleeve 11 is inserted into the latch hole 112, and the telescopic tube 12 is adjusted to a reasonable position so that the lower end of the pressure rod 13 contacts the upper surface of the uppermost counterweight 3. Then the pressure rod 13 is rotated to press the counterweight 3.

[0046] Example 2

[0047] This embodiment provides a crane equipped with the counterweight limiting device described in Embodiment 1.

[0048] like Figure 1 As shown, the crane further comprises a boom 2 , and a sleeve 11 is fixedly connected to the lower part of the boom 2 .

[0049] Example 3

[0050] This embodiment is based on Embodiment 1 and provides two application scenarios of the counterweight limiting device.

[0051] Fig.11 This is a schematic diagram of the counterweight limit device pressing two counterweights. Fig.12 The diagram is a schematic diagram of the counterweight limiting device pressing three counterweights. It can be seen that the counterweight limiting device is suitable for the limiting requirements of different numbers of counterweights.

[0052] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A counterweight limiting device, characterized in that: The invention comprises a limiting mechanism (1), wherein the limiting mechanism (1) comprises a sleeve (11), a telescopic tube (12), a pressure rod (13), a latch (14) and a storage assembly (15); The telescopic tube (12) is installed in the inner cavity of the sleeve (11), and the position of the telescopic tube (12) in the sleeve (11) is limited by the latch (14); The compression rod (13) is threadedly sleeved inside the telescopic tube (12); The storage component (15) is installed on the outer surface of the sleeve (11), and the latch (14) is arranged inside the storage component (15).

2. The counterweight limiting device according to claim 1, characterized in that: The outer side surface of the sleeve (11) is provided with a latch hole (112) corresponding to the latch (14); The outer side surface of the telescopic tube (12) is relatively provided with fixing holes (122); The telescopic tube (12) is fixed in the sleeve (11) by inserting the latch (14) through the fixing hole (122) into the latch hole (112).

3. The counterweight limiting device according to claim 1, characterized in that: The inner surface of the sleeve (11) is provided with a groove (113), and the groove (113) comprises an upper groove, a connecting groove and a lower groove; The upper groove is connected to the top of the sleeve (11), and the lower groove is connected to the bottom of the sleeve (11); the upper groove and the lower groove are connected via a connecting groove; The outer surface of the telescopic tube (12) is provided with a boss (121) that matches the groove (113); The telescopic tube (12) moves in the groove (113) via the boss (121) and then moves in the sleeve (11).

4. The counterweight limiting device according to claim 1, characterized in that: The outer surface of the sleeve (11) is provided with a mounting seat (111), and the storage assembly (15) is mounted on the mounting seat (111).

5. The counterweight limiting device according to claim 1, characterized in that: One end of the storage assembly (15) away from the sleeve (11) is mounted with a baffle (152) via a screw (151); The storage assembly (15) is provided with a first slot hole (154), a transverse slot (153) and a second slot hole (155); The first slot hole (154) is located at an end of the storage component (15) away from the sleeve (11); the second slot hole (155) is located at an end of the storage component (15) close to the sleeve (11); the first slot hole (154) and the second slot hole (155) are connected through a transverse slot (153).

6. The counterweight limiting device according to claim 5, characterized in that: The latch (14) comprises a pin shaft (141) and a handle (142); The pin shaft (141) is installed in the cavity of the storage component (15); The handle (142) is clamped in the first slot hole (154) or the second slot hole (155).

7. A crane, characterized in that: It comprises the counterweight limiting device as claimed in any one of claims 1 to 6.

8. The crane according to claim 7, characterized in that: It also comprises a lifting arm (2); a sleeve (11) is fixedly connected below the lifting arm (2).