Lifting arm pull pin interlocking device, lifting arm and lifting equipment
By designing the boom pulling pin interlocking device, the mechanical structure of the limit block and the fork pulling sheet can be used to achieve interlocking and unlocking of the cylinder pin and arm pin, which solves the problem of simultaneously pulling out the cylinder pin and arm pin in the prior art, and improves the safety and reliability of the lifting equipment.
Patent Information
- Application Number
- CN202421292226.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-06
AI Technical Summary
In the prior art, the cylinder pin and the arm pin are easily pulled out simultaneously during the telescopic process of the lifting equipment, resulting in unsafe equipment and the reliability of the telescopic process cannot be effectively guaranteed.
A boom pulling pin interlocking device is designed. By installing a limit block and a pulling piece on the cylinder pin and arm pin, the mechanical structure of the telescopic drive and connecting rod is used to achieve interlocking and unlocking of the cylinder pin and arm pin to avoid pulling out simultaneously.
It effectively avoids the cylinder pin and arm pin being pulled out simultaneously during the pull-out process, improves the safety and reliability of the lifting equipment and ensures the stability of the telescopic process.
Smart Images
Figure CN222630914U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lifting equipment, in particular to a boom pin interlocking device, a lifting boom and a lifting equipment. Background Art
[0002] Lifting equipment refers to a multi-action lifting equipment that can lift and carry heavy objects vertically and horizontally within a certain range. The lifting equipment has a turntable and a boom. When the lifting equipment is not performing lifting operations, the hydraulic system is controlled to make the boom as a whole be in a retracted state and extend in the horizontal direction; when the lifting equipment is required to perform lifting operations, the hydraulic system of the lifting equipment is controlled to rotate the boom relative to the turntable until the boom as a whole is lifted to the working position. During the lifting process or after being lifted to the working position, the telescopic boom can be extended and retracted.
[0003] The single-cylinder pin-type telescopic boom technology is a typical mechanical, electrical and hydraulic integrated system. As the actuator of the telescopic boom, it is mainly composed of a telescopic cylinder, a pin-pulling mechanism, a cylinder pin, an arm pin, etc. In order to ensure the safety and reliability of the telescopic boom extension process, the cylinder pin and the arm pin cannot be pulled out at the same time. Therefore, it is necessary to design a boom pin-pulling interlocking device to ensure that the cylinder pin and the arm pin will not be pulled out at the same time. Utility Model Content
[0004] In view of the above problems in the prior art, the present application proposes a boom pin pulling interlocking device, a lifting arm and a lifting equipment, which can ensure that the cylinder pin and the arm pin will not be pulled out at the same time.
[0005] The utility model provides a boom pin-pulling interlocking device, which is applied to a lifting arm. The boom pin-pulling interlocking device includes a boom telescopic oil cylinder, a piston rod of the boom telescopic oil cylinder can be fixedly installed on the lifting equipment, a cylinder pin, a first pin-pulling mechanism and a second pin-pulling mechanism are installed on the cylinder barrel of the boom telescopic oil cylinder, the first pin-pulling mechanism is used to drive the cylinder pin to be pulled out from the boom of the lifting arm, the second pin-pulling mechanism includes a telescopic driving member, a connecting rod and two fork pieces horizontally hinged to each other, the telescopic end of the telescopic driving member is connected to the first end of the fork piece through the connecting rod, and the telescopic end of the telescopic driving member is extended to drive the second ends of the two fork pieces to approach each other to pull the arm pin out of the boom of the lifting arm, and a limiting block is installed on the cylinder pin. When the first pin-pulling mechanism drives the cylinder pin to be pulled out from the boom of the lifting arm, the limiting block abuts against the fork piece to limit the movement of the second end of the fork piece.
[0006] As a further improvement of the above technical solution:
[0007] The above-mentioned boom pin pulling interlocking device, further, the first pin pulling mechanism includes a telescopic driving cylinder installed on the cylinder barrel of the boom telescopic cylinder, the piston rod of the telescopic driving cylinder can be connected with the cylinder pin, and a cylinder pin barrel is installed on the cylinder barrel of the boom telescopic cylinder, the cylinder pin is slidably installed in the cylinder pin barrel, and a cylinder pin spring is provided between the cylinder pin and the bottom of the cylinder pin barrel, and the cylinder pin spring can drive the cylinder pin to extend to the boom of the lifting arm.
[0008] The above-mentioned boom pin interlocking device, further, has an arm pin cylinder installed on the arm frame of the lifting arm, the arm pin is slidably installed in the arm pin cylinder, an arm pin spring is provided between the arm pin and the top of the arm pin cylinder, the arm pin spring can drive the arm pin to extend to the arm frame of the lifting arm, the end of the arm pin can extend from the top of the arm pin cylinder, and the end of the arm pin is provided with a thread groove extending axially, an adjusting screw is installed in the thread groove in cooperation with the inner thread, and the nut of the adjusting screw can be limited at the second end of the fork piece.
[0009] The above-mentioned boom pin interlocking device further comprises a guide groove formed at the second end of the fork piece, the rod body of the adjusting screw can pass through the guide groove, and the nut of the adjusting screw abuts against the side of the fork piece facing away from the arm pin.
[0010] The above-mentioned boom pin pulling interlocking device further has an articulated seat installed on the cylinder barrel of the boom telescopic cylinder, and the telescopic driving member is hinged on the articulated seat.
[0011] The above-mentioned boom pin pulling interlocking device further has the following features: the limit block is mounted on the cylinder pin via a connecting rod, a guide cylinder is mounted on the cylinder barrel of the boom telescopic cylinder, and the connecting rod is slidably mounted in the guide cylinder.
[0012] Another aspect of the utility model provides a lifting arm, wherein the lifting arm has the above-mentioned lifting arm pin interlocking device.
[0013] Another aspect of the utility model provides a lifting device, wherein the lifting device has the lifting arm as described above.
[0014] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the utility model can be achieved.
[0015] The utility model provides a boom pin pulling interlocking device, a crane arm and a crane equipment, which have at least the following beneficial effects compared with the prior art: when the first pin pulling mechanism drives the cylinder pin to be pulled out from the boom of the crane arm, the limit block abuts against the fork piece to limit the movement of the second end of the fork piece. At this time, the telescopic driving member cannot drive the second ends of the two fork pieces to approach each other. Therefore, the arm pin can be mechanically locked to avoid the arm pin being pulled out at the same time as the cylinder pin is pulled out. When the cylinder pin is inserted into the boom of the crane arm, the limit block will not limit the movement of the fork piece. Therefore, the extension of the telescopic end of the telescopic driving member can drive the second ends of the two fork pieces to approach each other to pull the arm pin out of the boom of the crane arm to unlock the boom of the crane arm. At this time, the extension of the boom telescopic cylinder can drive the extension of the boom section of the crane arm.
[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0018] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.
[0019] Figure 1 A schematic diagram of the explosion structure of the boom pin pulling interlocking device provided by an embodiment of the utility model is shown;
[0020] Figure 2 The utility model shows a schematic diagram of the installation structure of the boom pin pulling interlocking device provided in an embodiment of the utility model.
[0021] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.
[0022] Description of reference numerals:
[0023] 100- boom pin interlocking device, 110- boom telescopic cylinder, 111- cylinder pin barrel, 112- cylinder pin spring, 113- hinged seat, 114- guide cylinder, 120- cylinder pin, 121- limit block, 122- connecting rod, 130- first pin pulling mechanism, 131- telescopic drive cylinder, 140- second pin pulling mechanism, 141- telescopic drive member, 142- connecting rod, 143- fork piece, 144- guide groove, 150- arm pin, 151- arm pin barrel, 152- adjusting screw, 153- arm pin spring. DETAILED DESCRIPTION
[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0029] The utility model will be further described below in conjunction with the accompanying drawings.
[0030] The embodiment of the utility model provides a boom pin pulling interlocking device 100, which can ensure that the cylinder pin 120 and the arm pin 150 will not be pulled out at the same time.
[0031] See also Figure 1 and Figure 2 The boom pin-pulling interlocking device 100 provided by the embodiment of the utility model is applied to a crane boom. The boom pin-pulling interlocking device 100 includes a boom telescopic oil cylinder 110. The piston rod of the boom telescopic oil cylinder 110 can be fixedly installed on the lifting equipment. A cylinder pin 120, a first pin-pulling mechanism 130 and a second pin-pulling mechanism 140 are installed on the cylinder barrel of the boom telescopic oil cylinder 110. The first pin-pulling mechanism 130 is used to drive the cylinder pin 120 to be pulled out from the boom of the crane boom. The second pin-pulling mechanism 140 includes a telescopic driving member 141 and a connecting rod 142. And two fork pieces 143 horizontally hinged to each other, the telescopic end of the telescopic driving member 141 is connected to the first end of the fork piece 143 through the connecting rod 142, the extension of the telescopic end of the telescopic driving member 141 can drive the second ends of the two fork pieces 143 to approach each other to pull the arm pin 150 out of the boom of the crane arm, and a limit block 121 is installed on the cylinder pin 120. When the first pin pulling mechanism 130 drives the cylinder pin 120 to be pulled out of the boom of the crane arm, the limit block 121 abuts against the fork piece 143 to limit the movement of the second end of the fork piece 143.
[0032] When the first pin pulling mechanism 130 drives the cylinder pin 120 to be pulled out from the boom of the crane arm, the limit block 121 abuts against the fork plate 143 to limit the movement of the second end of the fork plate 143. At this time, the telescopic driving member 141 cannot drive the second ends of the two fork plates 143 to approach each other. Therefore, the arm pin 150 can be mechanically locked to avoid the arm pin 150 being pulled out at the same time as the cylinder pin 120 is pulled out. When the cylinder pin 120 is inserted into the boom of the crane arm, the limit block 121 will not limit the movement of the fork plate 143. Therefore, the extension of the telescopic end of the telescopic driving member 141 can drive the second ends of the two fork plates 143 to approach each other to pull the arm pin 150 out of the boom of the crane arm to unlock the boom of the crane arm. At this time, the extension of the boom telescopic cylinder 110 can drive the section arm of the crane arm to extend.
[0033] The boom pin pulling interlocking device 100 provided in the embodiment of the utility model, further, please refer to Figure 1 and Figure 2 The first pin-pulling mechanism 130 includes a telescopic drive cylinder 131 installed on the cylinder barrel of the boom telescopic oil cylinder 110. The piston rod of the telescopic drive cylinder 131 can be connected with the cylinder pin 120. A cylinder pin cylinder 111 is installed on the cylinder barrel of the boom telescopic oil cylinder 110. The cylinder pin 120 is slidably installed in the cylinder pin cylinder 111. A cylinder pin spring 112 is provided between the cylinder pin 120 and the bottom of the cylinder pin cylinder 111. The cylinder pin spring 112 can drive the cylinder pin 120 to extend to the boom of the boom. When the cylinder pin 120 needs to be inserted into the boom of the boom, the telescopic drive cylinder 131 stops working, and the cylinder pin spring 112 drives the cylinder pin 120 to extend to the boom of the boom to lock the cylinder barrel of the boom telescopic oil cylinder 110 on the boom of the boom.
[0034] The boom pin pulling interlocking device 100 provided in the embodiment of the utility model, further, please refer to Figure 1 and Figure 2 The arm frame of the boom is provided with an arm pin cylinder 151, and the arm pin 150 is slidably mounted in the arm pin cylinder 151. An arm pin spring 153 is provided between the arm pin 150 and the top of the arm pin cylinder 151. The arm pin spring 153 can drive the arm pin 150 to extend to the arm frame of the boom. The end of the arm pin 150 can extend from the top of the arm pin cylinder 151, and the end of the arm pin 150 is provided with a thread groove extending in the axial direction. The thread groove is threaded with an adjusting screw 152, and the nut of the adjusting screw 152 can be limited to the second end of the fork plate 143. When the arm pin 150 needs to be inserted into the arm frame of the boom, the telescopic driving member 141 stops working, and the arm pin spring 153 drives the arm pin 150 to extend to the arm frame of the boom to lock the arm frame of the boom. By adjusting the length of the thread of the adjusting screw 152 in the thread groove, the position of the nut of the adjusting screw 152 relative to the fork plate 143 is adjusted.
[0035] In this example, see Figure 1 and Figure 2 The second end of the fork 143 is provided with a guide groove 144, and the rod body of the adjusting screw 152 can be inserted into the guide groove 144, and the nut of the adjusting screw 152 abuts against the side of the fork 143 facing away from the arm pin 150. The extension of the telescopic end of the telescopic drive member 141 can drive the second ends of the two fork pieces 143 to approach each other to pull the arm pin 150 out of the boom of the crane to unlock the boom of the crane. An articulated seat 113 is installed on the cylinder barrel of the boom telescopic oil cylinder 110, and the telescopic drive member 141 is hinged on the articulated seat 113.
[0036] The boom pin-pulling interlocking device 100 provided by the embodiment of the utility model further comprises a stop block 121 mounted on the cylinder pin 120 via a connecting rod 122, a guide cylinder 114 is mounted on the cylinder barrel of the boom telescopic oil cylinder 110, and the connecting rod 122 is slidably mounted in the guide cylinder 114. The guide cylinder 114 can guide the connecting rod 122, so that the stop block 121 and the cylinder pin 120 move linearly synchronously.
[0037] The embodiment of the utility model also provides a crane arm, which has a crane arm pin interlocking device 100 provided by any of the above embodiments. The specific structure of the crane arm pin interlocking device 100 refers to the above embodiments. Since the crane arm adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.
[0038] The embodiment of the utility model also provides a lifting device, which has a lifting arm provided by any of the above embodiments. The specific structure of the lifting arm refers to the above embodiments. Since the lifting device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.
[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0040] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.
Claims
1. A boom pin interlocking device, applied to a crane boom, characterized in that: The boom pin pulling interlocking device includes a boom telescopic oil cylinder, a piston rod of the boom telescopic oil cylinder can be fixedly installed on the lifting equipment, a cylinder pin, a first pin pulling mechanism and a second pin pulling mechanism are installed on the cylinder barrel of the boom telescopic oil cylinder, the first pin pulling mechanism is used to drive the cylinder pin to be pulled out from the boom of the lifting arm, the second pin pulling mechanism includes a telescopic driving member, a connecting rod and two fork pieces horizontally hinged to each other, the telescopic end of the telescopic driving member is connected to the first end of the fork piece through the connecting rod, the telescopic end of the telescopic driving member is extended to drive the second ends of the two fork pieces to approach each other to pull the arm pin out of the boom of the lifting arm, a limit block is installed on the cylinder pin, when the first pin pulling mechanism drives the cylinder pin to be pulled out from the boom of the lifting arm, the limit block abuts against the fork piece to limit the movement of the second end of the fork piece 2. The boom pin pulling interlocking device according to claim 1, characterized in that: The first pin pulling mechanism includes a telescopic driving cylinder installed on the cylinder barrel of the boom telescopic cylinder, the piston rod of the telescopic driving cylinder can be connected to the cylinder pin, a cylinder pin barrel is installed on the cylinder barrel of the boom telescopic cylinder, the cylinder pin is slidably installed in the cylinder pin barrel, and a cylinder pin spring is provided between the cylinder pin and the bottom of the cylinder pin barrel, and the cylinder pin spring can drive the cylinder pin to extend to the boom of the lifting arm.
3. The boom pin pulling interlocking device according to claim 1, characterized in that: An arm pin cylinder is installed on the arm frame of the lifting arm, and the arm pin is slidably installed in the arm pin cylinder. An arm pin spring is provided between the arm pin and the top of the arm pin cylinder, and the arm pin spring can drive the arm pin to extend to the arm frame of the lifting arm. The end of the arm pin can extend from the top of the arm pin cylinder, and the end of the arm pin is provided with a thread groove extending axially, and an adjusting screw is installed in the thread groove in cooperation with the thread, and the nut of the adjusting screw can be limited at the second end of the fork piece.
4. The boom pin pulling interlocking device according to claim 3, characterized in that: A guide groove is formed at the second end of the fork plate, and the rod body of the adjusting screw can pass through the guide groove, and the nut of the adjusting screw abuts against the side of the fork plate facing away from the arm pin.
5. The boom pin pulling interlocking device according to claim 1, characterized in that: An articulated seat is installed on the cylinder barrel of the boom telescopic oil cylinder, and the telescopic driving member is hinged on the articulated seat.
6. The boom pin pulling interlocking device according to claim 1, characterized in that: The limit block is installed on the cylinder pin through a connecting rod, a guide cylinder is installed on the cylinder barrel of the arm telescopic cylinder, and the connecting rod is slidably installed in the guide cylinder.
7. A lifting arm, characterized in that: The lifting arm has a boom pin interlocking device as described in any one of claims 1 to 6.
8. A lifting device, characterized in that: The lifting equipment has a lifting boom as claimed in claim 7 .