Limiting assembly and crane
By designing the limiting and locking structures of the limiting components, the problem of the rope guide bar falling off was solved, improving the safety and stability of the crane and simplifying the operation process.
Patent Information
- Application Number
- CN202511296461.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-11
- Publication Date
- 2025-12-02
AI Technical Summary
The rope guards on existing cranes are prone to falling off during use, posing a safety risk and affecting normal operation. Furthermore, the disassembly and installation processes are complex.
A limiting component is designed, including first and second mounting seats, a stop bar, and a locking structure. The combination of the limiting structure and the locking structure ensures that the stop bar is fixed between the mounting seats to prevent it from falling off, and allows the stop bar to move to avoid falling off when the locking structure fails.
It improves the safety of rope guards and the stability of cranes, simplifies the disassembly and installation process of rope guards, and avoids the risk of rope guards being lost or falling off.
Smart Images
Figure CN121044484A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of crane technology, and more specifically to limiting components and cranes. Background Technology
[0002] Cranes are essential operating machinery in the construction of large-scale infrastructure. The rope guard is an important component on the boom to prevent rope jumping, tangling, and detachment. It is also an indispensable part of the crane. Before the boom enters the working state, the wire rope needs to be installed. During the installation process, the rope guard must be removed before the wire rope can be installed. After the wire rope is installed, the rope guard is reinstalled.
[0003] Currently, existing rope guide rods are usually straight shafts. After passing through two mounting holes on the boom, the rope guide rod is locked at both ends to prevent it from coming off the boom. When disassembling the rope guide rod, the locking piece at one end is usually removed, and then the entire rope guide rod is removed from the boom. In actual crane operation, if the locking piece at one end of the rope guide rod fails or is forgotten to be installed, the rope guide rod is prone to falling off the boom, posing a risk to its use. Summary of the Invention
[0004] In view of this, the present invention provides a limiting component and a crane to solve the problem of the risk of using the rope guide bar on the existing crane.
[0005] In a first aspect, the present invention provides a limiting assembly for limiting a wire rope on a crane boom, comprising: a mounting structure including a first mounting base and a second mounting base, the first mounting base having a first mounting hole and the second mounting base having a second mounting hole; a stop bar including a first mating section, a connecting section, and a second mating section connected in sequence, the first mating section passing through the first mounting hole and the second mating section passing through the second mounting hole, the first mating section being provided with a limiting structure configured to prevent passage through the second mounting hole; a first locking structure detachably connected to the first mating section and located on the side of the first mounting base opposite to the second mounting base, configured to prevent passage through the first mounting hole; and a second locking structure disposed on the second mating section and located on the side of the second mounting base opposite to the first mounting base, configured to prevent passage through the second mounting hole.
[0006] Beneficial effects: By setting a first locking structure, a second locking structure, and a limiting structure on the stop bar, the first and second locking structures can be assembled to restrict the stop bar between the two mounting seats. If one of the locking structures fails, the stop bar can move towards the remaining locking structure. Due to the existence of the limiting structure, when the limiting structure abuts against any mounting seat, the stop bar can no longer move, effectively preventing the stop bar from falling off the mounting structure. This not only improves the safety of the stop bar but also prevents it from being lost, improving the stability of the crane and effectively solving the problem of usage risks associated with existing rope-stopping rods on cranes.
[0007] In one alternative embodiment, the limiting structure protrudes from the outer wall of the first mating section, and the outer diameter of the limiting structure is larger than the inner diameter of the second mounting hole.
[0008] Beneficial effects: This type of limiting structure is simple and reliable, and can effectively abut against the second mounting base.
[0009] In one alternative implementation, the outer diameter of the limiting structure is less than or equal to the inner diameter of the first mounting hole.
[0010] Beneficial effects: With this type of limiting structure, when the stop bar needs to be removed, it can be pulled out directly through the first mounting hole without disassembling the limiting structure, which can effectively improve the convenience of removing the stop bar.
[0011] In one optional embodiment, the inner diameter of the first mounting hole is larger than the inner diameter of the second mounting hole, the outer diameter of the first mating section is larger than the outer diameter of the second mating section, the connecting surface of the first mating section and the connecting section forms an abutting surface, the abutting surface is used to abut and mate with the second mounting seat, and the abutting surface forms a limiting structure.
[0012] Beneficial effects: The structure is simple and reliable. The limiting structure can be formed by the structure of the first mating section itself. The structure has high strength and is easy to process and manufacture.
[0013] In one alternative embodiment, an elastic element is further provided on the abutting surface, and the abutting surface abuts and engages with the second mounting base through the elastic element.
[0014] Beneficial effects: The elastic element can act as a buffer, preventing rigid collisions between the contact surface and the second mounting seat during contact, thus reducing the wear rate of the stop bar and the second mounting seat and extending their service life.
[0015] In one optional embodiment, the first locking structure includes a first locking pin, and the end of the first mating section is provided with a first through hole extending radially through it. The first locking pin is detachably connected to the first through hole.
[0016] Beneficial effects: The first locking structure has a simple and reliable structure and locking method.
[0017] In one alternative implementation, the first locking pin is a resilient pin.
[0018] Beneficial effects: This type of first locking pin not only achieves the locking function, but also allows for flexible and quick assembly and disassembly.
[0019] In one optional embodiment, the second locking structure includes a second locking pin, and the end of the second mating section is provided with a second through hole that extends radially through it. The second locking pin is detachably connected to the second through hole.
[0020] Beneficial effects: The second locking structure has a simple and reliable structure and locking method.
[0021] In one alternative embodiment, the second locking structure further includes a washer fitted onto the second mating section and located between the second locking pin and the second mounting base, and / or, the second locking pin is a cotter pin.
[0022] Beneficial effects: The washer can act as a buffer between the second locking pin and the second mounting seat, avoiding frequent friction between the second locking pin and the second mounting seat. In addition, this type of second locking pin can reliably connect with the second mating section by deforming its own end. Since the stop bar does not need to be completely removed frequently during normal operation, the second locking pin can maintain a reliable locked state for a long time after being installed on the second mating section.
[0023] Secondly, the present invention also provides a crane, comprising: a body; a boom disposed on the body, wherein a pulley is rotatably disposed on the boom; a wire rope disposed on the boom and cooperating with the pulley; and the aforementioned limiting component disposed on the boom, wherein the stop bar of the limiting component is located on the side of the wire rope opposite to the pulley. Attached Figure Description
[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0025] Figure 1 This is a three-dimensional schematic diagram of a limiting component after assembly according to an embodiment of the present invention;
[0026] Figure 2 for Figure 1 The diagram shown is a three-dimensional representation of the limit assembly without the stop bar installed.
[0027] Figure 3 for Figure 1 A three-dimensional schematic diagram of the stop bar of the limit assembly shown;
[0028] Figure 4 for Figure 1 A three-dimensional schematic diagram of the first locking structure of the limiting component when it fails.
[0029] Explanation of reference numerals in the attached figures:
[0030] 1. Mounting structure; 101. First mounting base; 1011. First mounting hole; 102. Second mounting base; 1021. Second mounting hole;
[0031] 2. Stop bar; 201. First mating section; 2011. First through hole; 202. Connecting section; 203. Second mating section; 2031. Second through hole; 204. Abutment surface; 205. Elastic element;
[0032] 3. First locking structure; 4. Second locking structure; 401. Second locking pin; 402. Washer;
[0033] 5. Boom; 6. Pulley; 7. Wire rope; 8. Limiting structure;
[0034] X, the first direction. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0036] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.
[0037] In related technologies, because the locking components of the rope guide bar need to be frequently disassembled during assembly or disassembly, there are situations in actual use where operators forget to install the locking components, or the locking components fail during long-term use. When the crane is working normally, the rope guide bar is usually located at the far end of the boom and at a high height. In actual operation, if the rope guide bar falls off, it will become a falling object from a height, which can easily cause a safety accident. In addition, if the rope guide bar falls off during the crane's travel, it is easy to lose, which will affect the crane's subsequent normal operation and thus delay subsequent construction.
[0038] According to an embodiment of the present invention, in one aspect, a limiting component is provided for limiting the wire rope 7 on the crane boom 5. The limiting component includes: a mounting structure 1, a stop bar 2, a first locking structure 3, and a second locking structure 4.
[0039] Mounting structure 1 includes a first mounting base 101 and a second mounting base 102. The first mounting base 101 has a first mounting hole 1011 and the second mounting base 102 has a second mounting hole 1021.
[0040] The stop bar 2 includes a first mating section 201, a connecting section 202 and a second mating section 203 connected in sequence. The first mating section 201 passes through the first mounting hole 1011 and the second mating section 203 passes through the second mounting hole 1021. A limit structure 8 is provided on the first mating section 201. The limit structure 8 is configured to not pass through the second mounting hole 1021.
[0041] The first locking structure 3 is detachably connected to the first mating section 201 and is located on the side of the first mounting base 101 opposite to the second mounting base 102, and is configured to not pass through the first mounting hole 1011;
[0042] The second locking structure 4 is disposed in the second mating section 203 and located on the side of the second mounting base 102 opposite to the first mounting base 101, and is configured to not pass through the second mounting hole 1021.
[0043] By applying the limiting component of this embodiment, a first locking structure 3, a second locking structure 4, and a limiting structure 8 are provided on the stop bar 2. After the first locking structure 3 and the second locking structure 4 are assembled, the stop bar 2 can be restricted between the two mounting seats. If one of the locking structures fails, the stop bar 2 can move towards the direction of the remaining locking structure. Due to the existence of the limiting structure 8, when the limiting structure 8 abuts against any mounting seat, the stop bar 2 cannot continue to move, which can effectively prevent the stop bar 2 from falling off the mounting structure 1. This not only improves the safety of the stop bar 2 but also prevents the stop bar 2 from being lost, improves the stability of the crane, and effectively solves the problem of the risk of use of the rope guard bar on the existing crane.
[0044] It should be noted that, in this embodiment, the first direction X refers to Figure 2 The direction of the "X" indicated by the middle arrow.
[0045] Specifically, there is no limitation on the contact form of the limiting structure 8. The limiting structure 8 can be limited to one of the first mounting base 101 or the second mounting base 102, or it can be limited to either the first mounting base 101 or the second mounting base 102, as long as the limiting structure 8 can prevent the stop bar 2 from falling off to one side.
[0046] It is understood that, as an alternative implementation, the limiting structure 8 may also be provided on the connecting section 202 or the second mating section 203.
[0047] Furthermore, such as Figure 4 As shown, since the limiting structure 8 is set on the first mating section 201, when it is necessary to install or remove the wire rope 7, it is only necessary to remove the first locking structure 3 and move the stop bar 2 toward the direction of the second locking structure 4. At this time, the stop bar 2 abuts against the first mounting seat 101 under the action of the limiting structure 8. While preventing the stop bar 2 from falling off, it can also effectively avoid the movement path of the wire rope 7. During the loading and unloading process, the operator no longer needs to completely remove the stop bar 2, which can save the process of placing and installing the stop bar 2, and also speed up the loading and unloading process of the stop bar 2.
[0048] In one possible implementation, such as Figure 2 and Figure 3 As shown, the limiting structure 8 protrudes from the outer wall of the first mating section 201, and the outer diameter of the limiting structure 8 is larger than the inner diameter of the second mounting hole 1021. This type of limiting structure 8 is simple and reliable, and can effectively abut against the second mounting base 102.
[0049] It is understood that, as an alternative implementation, the limiting structure 8 can also be installed on the first mating section 201 and limited by its own protruding portion.
[0050] Specifically, the form of the limiting structure 8 is not limited. It can be an independent component that can be detachably connected to the first mating section 201, or it can be a structure integrally formed on the first mating section 201, as long as it can play a limiting role.
[0051] In one possible implementation, such as Figure 2 and Figure 3 As shown, the outer diameter of the limiting structure 8 is less than or equal to the inner diameter of the first mounting hole 1011. With this type of limiting structure 8, when the stop bar 2 needs to be removed, the stop bar 2 can be directly pulled out through the first mounting hole 1011 without disassembling the limiting structure 8, which can effectively improve the convenience of removing the stop bar 2.
[0052] It is understandable that, as an alternative implementation, if the limiting structure 8 can be flexibly disassembled, the outer diameter of the limiting structure 8 can also be set to be larger than the inner diameter of the first mounting hole 1011.
[0053] In one possible implementation, such as Figure 2 and Figure 3As shown, the inner diameter of the first mounting hole 1011 is larger than the inner diameter of the second mounting hole 1021, and the outer diameter of the first mating section 201 is larger than the outer diameter of the second mating section 203. The connecting surfaces of the first mating section 201 and the connecting section 202 form an abutment surface 204, which is used to abut against the second mounting base 102. The abutment surface 204 forms a limiting structure 8. The structure is simple and reliable. The limiting structure 8 can be formed by the structure of the first mating section 201 itself. The structure has high strength and is also easy to process and manufacture.
[0054] Specifically, such as Figure 3 As shown, the outer diameter of the second mating section 203 is the same as the outer diameter of the connecting section 202, and this type of stop bar 2 is easy to process and manufacture.
[0055] In one possible implementation, such as Figure 3 As shown, an elastic element 205 is also provided on the abutment surface 204. The abutment surface 204 abuts against the second mounting base 102 through the elastic element 205. The elastic element 205 can play a buffering role, avoiding rigid collision between the abutment surface 204 and the second mounting base 102 during the abutment process, which can reduce the wear rate of the stop bar 2 and the second mounting base 102 and extend the service life of the stop bar 2 and the second mounting base 102.
[0056] Specifically, such as Figure 3 As shown, the elastic element 205 has a ring-shaped structure and is located at the edge of the contact surface 204. This type of elastic element 205 can play a more reliable buffering role.
[0057] In one possible implementation, such as Figure 1 As shown, the first locking structure 3 includes a first locking pin, and the end of the first mating section 201 is provided with a first through hole 2011 that extends radially through it. The first locking pin is detachably connected to the first through hole 2011. The structure and locking method of the first locking structure 3 are simple and reliable.
[0058] It is understandable that, as an alternative implementation method, the first locking structure 3 can also be a locking structure such as a fixing clamp or a fixing bolt.
[0059] In one possible implementation, such as Figure 1 As shown, the first locking pin is a spring pin. This type of first locking pin can achieve the locking function while also allowing for flexible and quick assembly and disassembly.
[0060] In one possible implementation, such as Figure 1 As shown, the second locking structure 4 includes a second locking pin 401, and the end of the second mating section 203 is provided with a second through hole 2031 that extends radially through it. The second locking pin 401 and the second through hole 2031 are detachably connected. The structure and locking method of the second locking structure 4 are simple and reliable.
[0061] It is understandable that, as an alternative implementation, the second locking structure 4 can also be a locking structure such as a fixing clamp or a fixing bolt.
[0062] In one possible implementation, such as Figure 1 As shown, the second locking structure 4 also includes a washer 402, which is sleeved on the second mating section 203 and located between the second locking pin 401 and the second mounting seat 102. The washer 402 can play a buffering role between the second locking pin 401 and the second mounting seat 102 to avoid frequent friction between the second locking pin 401 and the second mounting seat 102.
[0063] Specifically, there is no limitation on the specific form of the washer 402. It can be a metal washer 402, a nylon washer 402, or a rubber washer 402, etc., and can be flexibly selected according to actual needs.
[0064] In one possible implementation, such as Figure 1 As shown, the second locking pin 401 is a cotter pin. This type of second locking pin 401 can reliably connect with the second mating section 203 by deforming its own end. Since the stop bar 2 does not need to be completely removed frequently during normal operation, the second locking pin 401 can maintain a reliable locking state for a long time after being installed on the second mating section 203.
[0065] Specifically, during normal operation, the stop lever 2 only needs to avoid the assembly path of the wire rope 7, without having to completely remove the stop lever 2. Therefore, the second locking pin 401 in the form of a cotter pin is more suitable. Although it is more difficult to disassemble, its locking ability is more stable and reliable. The second locking pin 401 can be regarded as an integral structure with the second mating section 203, so that the movement of the stop lever 2 in the first direction X can be reliably guaranteed.
[0066] According to an embodiment of the present invention, in another aspect, a crane is provided, comprising: a frame, a boom 5, a wire rope 7, and the aforementioned limiting assembly. The boom 5 is disposed on the frame, and a pulley 6 is rotatably disposed on the boom 5; the wire rope 7 is disposed on the boom 5 and cooperates with the pulley 6; the limiting assembly is disposed on the boom 5, and the stop bar 2 of the limiting assembly is located on the side of the wire rope 7 opposite to the pulley 6.
[0067] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A limiting assembly for limiting the wire rope (7) on a crane boom (5), characterized in that, include: The mounting structure (1) includes a first mounting base (101) and a second mounting base (102), wherein the first mounting base (101) has a first mounting hole (1011) and the second mounting base (102) has a second mounting hole (1021); The stop bar (2) includes a first mating section (201), a connecting section (202), and a second mating section (203) connected in sequence. The first mating section (201) passes through the first mounting hole (1011), and the second mating section (203) passes through the second mounting hole (1021). A limit structure (8) is provided on the first mating section (201), and the limit structure is configured to prevent it from passing through the second mounting hole (1021). The first locking structure (3) is detachably connected to the first mating section (201) and is located on the side of the first mounting base (101) opposite to the second mounting base (102), and is configured to not pass through the first mounting hole (1011). The second locking structure (4) is disposed in the second mating section (203) and located on the side of the second mounting base (102) opposite to the first mounting base (101), and is configured to not pass through the second mounting hole (1021).
2. The limiting component according to claim 1, characterized in that, The limiting structure (8) protrudes from the outer wall of the first mating section (201), and the outer diameter of the limiting structure (8) is larger than the inner diameter of the second mounting hole (1021).
3. The limiting component according to claim 2, characterized in that, The outer diameter of the limiting structure (8) is less than or equal to the inner diameter of the first mounting hole (1011).
4. The limiting component according to claim 3, characterized in that, The inner diameter of the first mounting hole (1011) is larger than the inner diameter of the second mounting hole (1021), the outer diameter of the first mating section (201) is larger than the outer diameter of the second mating section (203), the connecting surface of the first mating section (201) and the connecting section (202) forms an abutting surface (204), the abutting surface (204) is used to abut against the second mounting base (102), and the abutting surface (204) forms the limiting structure (8).
5. The limiting component according to claim 4, characterized in that, An elastic element (205) is also provided on the abutting surface (204), and the abutting surface (204) abuts against the second mounting base (102) through the elastic element (205).
6. The limiting component according to any one of claims 1 to 5, characterized in that, The first locking structure (3) includes a first locking pin, and the end of the first mating section (201) is provided with a first through hole (2011) that extends radially through it. The first locking pin is detachably connected to the first through hole (2011).
7. The limiting component according to claim 6, characterized in that, The first locking pin is a flexible pin.
8. The limiting component according to any one of claims 1 to 5, characterized in that, The second locking structure (4) includes a second locking pin (401), and the end of the second mating section (203) is provided with a second through hole (2031) that extends radially through it. The second locking pin (401) and the second through hole (2031) are detachably connected.
9. The limiting component according to claim 8, characterized in that, The second locking structure (4) further includes a washer (402), which is sleeved on the second mating section (203) and located between the second locking pin (401) and the second mounting base (102). And / or, the second locking pin (401) is a cotter pin.
10. A crane, characterized in that, include: body; A boom (5) is mounted on the machine body, and a pulley (6) is rotatably mounted on the boom (5); A steel wire rope (7) is installed on the boom (5) and cooperates with the pulley (6); The limiting component according to any one of claims 1 to 9 is disposed on the boom (5), and the stop bar (2) of the limiting component is located on the side of the wire rope (7) away from the pulley (6).