Pin shaft inserting and pulling device for annularly-arranged pin shafts and crane

Abstract

The utility model relates to the field of engineering machinery, and discloses a pin shaft inserting and pulling device for annularly arranged pin shafts and a crane. The pin shaft inserting and pulling device comprises a disc assembly, the disc assembly comprises a movable disc which is coaxially arranged in a center cavity surrounded by a plurality of pin shafts to be inserted and pulled, and the movable disc can be driven to move in the axial direction; the transmission connecting rod assemblies are arranged around the movable disc at intervals in the circumferential direction and are used for driving the multiple pin shafts to be inserted and pulled in a one-to-one correspondence mode; the moving disc moving in the axial direction can drive the transmission connecting rod assembly to move in the radial direction so as to push the pin shaft to be inserted and pulled to be inserted and pulled. The crane comprises a slewing bearing and the pin shaft inserting and pulling device for annularly arranging the pin shaft, and the pin shaft inserting and pulling device is used for integrally inserting and pulling the annularly arranged pin shaft of the slewing bearing. According to the pin shaft inserting and pulling device for the annularly-arranged pin shaft and the crane, the difficulty of pulling and pulling the pin shaft to be inserted and pulled and the stroke space needed by moving the disc can be reduced.

Description

Technical Field

[0001] The present application belongs to the field of engineering machinery, and in particular, relates to a pin insertion and extraction device for annularly arranged pins and a crane. Background Art

[0002] In construction cranes, the frame and the turntable are often connected by a latch. In order to ensure the reliability of the connection between the frame and the turntable, a large number of latches are used during the connection, resulting in low disassembly and assembly efficiency. In the prior art, a single cylinder is generally arranged in correspondence with a single pin shaft, or a set of mobile cylinders is arranged in correspondence with multiple latches to achieve the disassembly and assembly of the latch. However, there are still problems such as the force direction of the latch is not parallel to the movement direction, the difficulty of plugging and unplugging, and the latch drive requires a large stroke, which wastes installation space. Summary of the invention

[0003] The purpose of the present application is to provide a pin insertion and extraction device and a crane for annularly arranged pins to improve the efficiency of pin disassembly and assembly.

[0004] To achieve the above-mentioned purpose, the present application provides, on one hand, a pin shaft plugging and pulling device for annularly arranged pin shafts, the pin shaft plugging and pulling device comprising:

[0005] A disc assembly, comprising a movable disc coaxially arranged in a central cavity surrounded by a plurality of pins to be plugged in and out, the movable disc being capable of being driven to move axially; and

[0006] The transmission connecting rod assembly is arranged around the moving disc at intervals in the circumferential direction and is used to drive a plurality of pin shafts to be inserted and removed in a one-to-one correspondence;

[0007] The axially movable disc can drive the transmission connecting rod assembly to move radially to push the pin shaft to be inserted or removed.

[0008] In some embodiments, the disc assembly comprises:

[0009] A plurality of vertical racks are arranged at intervals in the circumferential direction on the circumference of the moving disc and arranged in the vertical direction;

[0010] The transmission connecting rod assembly includes a transmission gear and a connecting rod assembly that are meshed with the corresponding vertical rack for transmission. The rotating transmission gear can drive the pin shaft to be inserted and removed to move radially through the connecting rod assembly.

[0011] In some embodiments, the connecting rod assembly includes:

[0012] A first four-bar linkage, the first four-bar linkage comprising a first active rod, a transmission gear being fixedly mounted on a hinged end of the first active rod; and

[0013] A second four-bar connecting rod, the second four-bar connecting rod comprising a second connecting rod, and the pin shaft to be inserted and removed is installed on the second connecting rod;

[0014] The first four-bar connecting rod and the second four-bar connecting rod swing synchronously.

[0015] In some embodiments, both the first four-bar linkage and the second four-bar linkage are parallelogram mechanisms.

[0016] In some embodiments, the connecting rod assembly includes:

[0017] The gear transmission group includes a first gear and a second gear for meshing transmission. The first gear is installed at the hinge point between the driven rod of the first four-bar linkage and the first link, and the second gear is installed at the hinge end of the second active rod of the second four-bar linkage.

[0018] In some embodiments, the connecting rod assembly includes:

[0019] The integrated connecting rod frame comprises a first connecting rod of a first four-linking rod and a second connecting rod frame of a second four-linking rod.

[0020] In some embodiments, the disc assembly comprises:

[0021] A fixed disc is provided with a plurality of frame plates which are arranged at intervals along the circumferential direction, and the frame plate is the first frame of the first four-bar linkage.

[0022] In some embodiments, the movable disc is overlapped with the fixed disc and arranged on the first side of the fixed disc with the frame plate, and the pin shaft plugging and pulling device includes a power machine installed on the second side of the fixed disc, the power machine is installed at the center position of the fixed disc and is used to drive the movable disc to move axially.

[0023] In some embodiments, the power machine is a linear drive motor.

[0024] On one hand, the present application provides a crane, including a slewing bearing and the above-mentioned pin shaft plugging and pulling device for annularly arranged pin shafts, wherein the pin shaft plugging and pulling device is used for integrally plugging and pulling out the annularly arranged pin shafts of the slewing bearing.

[0025] In the technical solution of the present application, through the axial movement of the moving disc, multiple sets of transmission connecting rod assemblies spaced circumferentially and arranged around the moving disc can be synchronously driven, thereby driving the pins to be plugged in and out, and then realizing the radial pushing out action or radial retracting action of multiple sets of pins to be plugged in and out. Compared with the arrangement of a single oil cylinder and a single pin to be plugged in and out, the arrangement of the present application can realize the synchronous plugging and pulling action of multiple pins to be plugged in and out, and has a simple structure, high practicality and economy.

[0026] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0028] Figure 1 It is a structural schematic diagram of a pin shaft plugging and extracting device according to a specific embodiment of the present application;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure of the pin shaft plugging and pulling device in the top view;

[0030] Figure 3 It is a structural schematic diagram of an active component according to a specific implementation method of the present application;

[0031] Figure 4 It is a structural schematic diagram of a support plate according to a specific embodiment of the present application;

[0032] Figure 5 It is a structural schematic diagram of a connecting rod assembly when a connecting pin shaft connects an upper vehicle body and a lower vehicle body according to a specific embodiment of the present application;

[0033] Figure 6 for Figure 5 A schematic diagram of the structure of the connecting rod assembly when the connecting pin shaft is not connected to the upper body and the lower body.

[0034] Description of Reference Numerals

[0035] 100 Pin shaft to be inserted and removed 321b Follower rod

[0036] 200 disc assembly 321c first connecting rod

[0037] 210 moving disc 322 second four-link

[0038] 211 vertical rack 322a second connecting rod

[0039] 220 fixed disc 322b second active rod

[0040] 221 rack plate 322c second rack

[0041] 300 Transmission connecting rod assembly 323 Gear transmission group

[0042] 310 transmission gear 323a first gear

[0043] 320 transmission connecting rod assembly 323b second gear

[0044] 321 First four-link 324 Integrated connecting rod frame

[0045] 321a First active rod 400 Power machine DETAILED DESCRIPTION

[0046] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0047] The pin insertion and extraction device and the crane for annularly arranged pins according to the present application are described below with reference to the accompanying drawings.

[0048] The present application discloses a pin insertion and extraction device for annularly arranged pins. Figure 1 and Figure 2 As shown, a pin shaft plugging and pulling device in a specific embodiment includes:

[0049] The disc assembly 200 includes a movable disc 210 coaxially disposed in a central cavity surrounded by a plurality of pins 100 to be plugged in and out, and the movable disc 210 can be driven to move axially; and

[0050] The transmission connecting rod assembly 300 is arranged around the moving disc 210 at intervals in the circumferential direction and is used to drive a plurality of pin shafts 100 to be inserted or removed in a one-to-one correspondence;

[0051] The axially movable disk 210 can drive the transmission connecting rod assembly 300 to move radially to push the pin shaft 100 to be inserted or removed.

[0052] Specifically, the moving disc 210 is coupled with multiple sets of transmission link assemblies 300. The axial movement of the moving disc 210 in the central cavity of the disc assembly 200 can synchronously drive multiple sets of transmission link assemblies 300 that are circumferentially spaced and arranged around the moving disc 210, and through the movement of multiple sets of transmission link assemblies 300, the pins 100 to be plugged and unplugged corresponding to the transmission link assemblies 300 are driven, so that the pins 100 to be plugged and unplugged can be synchronously telescopic along the radial direction of the disc assembly 200. When the pins 100 to be plugged and unplugged are extended, the frame and the turntable can be connected to achieve the fixation of the turntable relative to the frame; when the pins 100 to be plugged and unplugged are retracted, the connection between the frame and the turntable can be released, so that the turntable can rotate by itself. Compared with the arrangement of a single oil cylinder and a single pin, the arrangement of the pin plugging and unplugging device of the present application can realize the synchronous plugging and unplugging of multiple pins 100 to be plugged and unplugged, and the structure is simple, and the practicality and economy are high. Of course, the movement of the moving disk 210 is not limited to axial movement, but may also be circumferential rotation, and the rotation of the moving disk 210 drives the transmission connecting rod assembly 300 to move, thereby driving the pin shaft 100 to be inserted or removed.

[0053] When the disc assembly 200 drives the transmission connecting rod assembly 300 in axial motion, as shown in FIG. Figure 3 , Figure 4 and Figure 5 As shown, the disk assembly 200 may include:

[0054] A plurality of vertical racks 211 are arranged at intervals in the circumferential direction on the circumference of the moving disc 210 and arranged in the vertical direction;

[0055] The transmission connecting rod assembly 300 includes a transmission gear 310 and a connecting rod assembly 320 that mesh with the corresponding vertical rack 211. The rotating transmission gear 310 can drive the pin shaft 100 to be inserted and removed to move radially through the connecting rod assembly 320. Figure 3 and Figure 4 . When the moving disc 210 moves axially, the vertical rack 211 can be driven to move, and the vertical rack 211 meshes with the transmission gear 310 and drives the transmission gear 310 to rotate. The rotational movement of the transmission gear 310 can drive the connecting rod assembly 320 to move radially. Since the connecting rod assembly 320 is driven by the transmission gear 310, under the premise that the transmission gear 310 rotates a fixed angle, the length of the connecting rod of the connecting rod assembly 320 can be lengthened, thereby increasing the range of motion of the connecting rod assembly 320. In other words, with the cooperation of the transmission gear 310 and the connecting rod assembly 320, the length of the connecting rod of the connecting rod assembly 320 can be lengthened, so that the vertical rack 211 only needs a smaller stroke to drive the pin shaft 100 to be plugged in and out to extend and retract, saving the stroke space of the vertical rack 211, thereby reducing the installation space required for the pin shaft plugging and pulling device.

[0056] Of course, when the disk assembly 200 drives the driving link assembly 300 with a circumferential rotational motion, the disk assembly 200 may include helical teeth, wherein the driving gear 310 is a helical gear that can mesh with the helical teeth and be driven to rotate by the helical teeth.

[0057] When the connecting rod assembly 320 is driven by the transmission gear 310, as shown in FIG. Figure 5 , Figure 6 As shown, the connecting rod assembly 320 may include:

[0058] A first four-link 321, wherein the first four-link 321 includes a first active rod 321a, and a transmission gear 310 is fixedly mounted on a hinged end of the first active rod 321a; and

[0059] A second four-link rod 322, the second four-link rod 322 comprises a second link rod 322a, and the pin shaft 100 to be inserted and removed is installed on the second link rod 322a;

[0060] The first four-link 321 and the second four-link 322 swing synchronously.

[0061] Specifically, see Figure 5 and Figure 6 In order to realize the radial movement of the pin shaft 100 to be plugged in and out, the first four-link 321 and the second four-link 322 that swing synchronously can be introduced. Among them, the second four-link 322 is used to transmit the swinging motion of the connecting rod of the first four-link 321 to the pin shaft 100 to be plugged in and out, and convert the swinging motion of the connecting rod of the first four-link 321 into the radial movement of the pin shaft 100 to be plugged in and out along the moving disk 210. Such a setting is conducive to the driving force of the pin shaft 100 to be plugged in and out being parallel to the movement direction of the pin shaft 100 to be plugged in and out, thereby facilitating the plugging and unplugging of the pin shaft 100 to be plugged in and out, and further improving the disassembly efficiency of the pin shaft 100 to be plugged in and out.

[0062] In order to better convert the swinging motion of the connecting rod of the first four-bar connecting rod 321 into the radial motion of the pin shaft 100 to be inserted and removed along the moving disk 210, as shown in FIG. Figure 5 and Figure 6 As shown, both the first four-bar link 321 and the second four-bar link 322 can be parallelogram mechanisms.

[0063] Specifically, see Figure 5 and Figure 6 When the first four-link 321 and the second four-link 322 are both symmetrically arranged parallelogram mechanisms, the swing angles of the first active rod 321a and the driven rod 321b are consistent and the symmetrical movement of the first four-link 321 and the second four-link 322 can be achieved. Among them, the movement of the first four-link 321 can be decomposed into movement in the vertical direction and the horizontal direction. Through the symmetrical movement of the first four-link 321 and the second four-link 322, the vertical movement of the first four-link 321 and the vertical movement of the second four-link 322 can be offset, thereby ensuring that the driving force of the second four-link 322 on the pin 100 to be plugged in is parallel to the movement direction required by the pin 100 to be plugged in, thereby facilitating the plugging and unplugging of the pin 100 to be plugged in, without the need to set a larger power source to drive the movement of the connecting rod assembly. Such a setting not only improves the plugging and unplugging efficiency of the pin 100 to be plugged in, but also facilitates the compactness and miniaturization of the pin plugging and unplugging device.

[0064] In order to better realize the synchronous swing of the first four-link 321 and the second four-link 322, as shown in FIG. Figure 5 and Figure 6 As shown, the connecting rod assembly 320 may include:

[0065] The gear transmission group 323 includes a first gear 323a and a second gear 323b that are meshed and transmitted. The first gear 323a is installed at the hinge point between the driven rod 321b and the first connecting rod 321c of the first four-bar connecting rod 321, and the second gear 323b is installed at the hinge end of the second active rod 322b of the second four-bar connecting rod 322.

[0066] Specifically, the yaw motion of the driven rod 321b of the first four-bar linkage 321 can drive the first gear 323a to rotate relative to the hinge point between the driven rod 321b and the first link 321c, so that the first gear 323a can drive the rotation of the second gear 323b meshing with the first gear 323a, so that the second gear 323b can drive the swing of the second active rod 322b of the second four-bar linkage 322. Such a configuration is conducive to achieving synchronous swing of the first four-bar linkage 321 and the second four-bar linkage 322.

[0067] In order to better realize the synchronous swing of the first four-link 321 and the second four-link 322, as shown in FIG. Figure 5 and Figure 6 As shown, the connecting rod assembly 320 may include:

[0068] The integrated link frame 324 includes a first link 321 c of the first four-link 321 and a second frame 322 c of the second four-link 322 .

[0069] Specifically, when the first link 321c of the first four-bar linkage 321 and the second frame 322c of the second four-bar linkage 322 are fixedly connected to form an integrated link frame 324, the integrated link frame 324 can be equivalent to the fixed frame of the active rod of the second four-bar linkage 322, so that the first four-bar linkage 321 and the second four-bar linkage 322 can swing synchronously.

[0070] Among them, Figure 5 and Figure 6 As shown, the disc assembly 200 comprises:

[0071] The fixed disk 220 is provided with a plurality of frame plates 221 arranged at intervals along the circumferential direction, and the frame plate 221 is a first frame of the first four-link 321 .

[0072] Specifically, the frame plate 221 is directly used as the first frame of the first four-link 321, so that the pin shaft plugging and extracting device has a compact structure and can also save materials.

[0073] like Figure 5 and Figure 6 As shown, the movable disc 210 is stacked with the fixed disc 220 and arranged on the first side of the fixed disc 220 together with the frame plate 221. The pin shaft plugging and pulling device includes a power machine 400 installed on the second side of the fixed disc 220. The power machine 400 is installed at the center position of the fixed disc 220 and is used to drive the movable disc 210 to move axially.

[0074] With such an arrangement, the structure of the pin shaft plug-in and pull-out device for annularly arranged pin shafts is more compact, and the power machine 400 and the movable disc 210 can be integrated, making the installation and replacement of the pin shaft plug-in and pull-out device more convenient. That is, when installing or replacing a turntable with a pin shaft plug-in and pull-out device, there is no need to connect the power machine 400 and the movable disc 210, and the turntable can be used after the installation or replacement is completed.

[0075] In this embodiment, if Figure 5 and Figure 6 As shown, the power machine 400 may be a linear drive motor.

[0076] The moving disc 210 is axially moved by the linear drive motor, thereby driving the pin shaft 100 to be inserted and removed to extend and retract. The linear drive motor is selected as the power machine 400, while ensuring the power requirement, the installation space required for the power machine 400 can be reduced, further improving the compactness of the pin shaft insertion and removal device.

[0077] Of course, the power machine 400 may also be other power sources such as a cylinder.

[0078] The present application also discloses a novel crane, comprising a slewing bearing and the above-mentioned pin shaft plugging and pulling device for annularly arranged pin shafts, wherein the pin shaft plugging and pulling device is used for integrally plugging and pulling the annularly arranged pin shafts of the slewing bearing.

[0079] Since the crane includes the above-mentioned pin shaft plug-in and pull-out device, the plug-in and pull-out efficiency of the connecting pin shaft in the integrated plug-in and pull-out slewing bearing is higher. In addition, due to the integrated design of the power machine 400 and the moving disc 210 of the above-mentioned pin shaft plug-in and pull-out device, it is no longer necessary to connect the power machine 400 and the moving disc 210, so the installation and replacement of the slewing bearing is also more convenient.

[0080] In the description of the present application, it should be understood that 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0081] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0082] 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 present application. 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.

Claims

1. A pin insertion and extraction device for annularly arranged pins, characterized in that: The pin insertion and extraction device comprises: A disc assembly (200) comprises a movable disc (210) coaxially arranged in a central cavity surrounded by a plurality of pins (100) to be plugged in and out, wherein the movable disc (210) can be driven to move axially; and A transmission connecting rod assembly (300) is arranged around the moving disc (210) at intervals in the circumferential direction and is used to drive the plurality of pin shafts (100) to be inserted or removed in a one-to-one correspondence; The axially movable disc (210) can drive the transmission connecting rod assembly (300) to move radially to push the pin shaft to be inserted or removed.

2. The pin insertion and extraction device for annularly arranged pins according to claim 1, characterized in that: The disc assembly (200) comprises: A plurality of vertical racks (211) are arranged at intervals in the circumferential direction on the peripheral portion of the moving disc (210) and arranged in the vertical direction; The transmission connecting rod assembly (300) comprises a transmission gear (310) and a connecting rod assembly (320) meshed with the corresponding vertical rack (211), and the rotating transmission gear (310) can drive the pin shaft (100) to be inserted and removed to move radially through the connecting rod assembly (320).

3. The pin insertion and extraction device for annularly arranged pins according to claim 2, characterized in that: The connecting rod assembly (320) comprises: A first four-bar linkage (321), wherein the first four-bar linkage (321) comprises a first active rod (321a), and the transmission gear (310) is fixedly mounted on a hinged end of the first active rod (321a); ​​and A second four-bar linkage (322), wherein the second four-bar linkage (322) comprises a second link (322a), and the pin shaft (100) to be inserted or removed is mounted on the second link (322a); Wherein, the first four-link (321) and the second four-link (322) swing synchronously.

4. The pin insertion and extraction device for annularly arranged pins according to claim 3, characterized in that: The first four-bar linkage (321) and the second four-bar linkage (322) are both parallelogram mechanisms.

5. The pin insertion and extraction device for annularly arranged pins according to claim 3, characterized in that: The connecting rod assembly (320) comprises: The gear transmission group (323) comprises a first gear (323a) and a second gear (323b) for meshing transmission, wherein the first gear (323a) is installed at a hinge point between a driven rod (321b) and a first connecting rod (321c) of the first four-bar connecting rod (321), and the second gear (323b) is installed at a hinge end of a second active rod (322b) of the second four-bar connecting rod (322).

6. The pin insertion and extraction device for annularly arranged pins according to claim 5, characterized in that: The connecting rod assembly (320) comprises: The integrated connecting rod frame (324) comprises a first connecting rod (321c) of the first four-link connecting rod (321) and a second frame (322c) of the second four-link connecting rod (322).

7. The pin insertion and extraction device for annularly arranged pins according to any one of claims 3 to 6, characterized in that: The disc assembly (200) comprises: A fixed disc (220) is provided with a plurality of frame plates (221) arranged at intervals in the circumferential direction, and the frame plates (221) are the first frames of the first four-link (321).

8. The pin insertion and extraction device for annularly arranged pins according to claim 7, characterized in that: The movable disc (210) is stacked with the fixed disc (220) and arranged on a first side of the fixed disc (220) together with the frame plate (221); the pin shaft plugging and pulling device comprises a power machine (400) installed on a second side of the fixed disc (220); the power machine (400) is installed at a central position of the fixed disc (220) and is used to drive the movable disc (210) to move axially.

9. The pin insertion and extraction device for annularly arranged pins according to claim 8, characterized in that: The power machine (400) is a linear drive motor.

10. A crane comprising a slewing bearing, characterized in that: The crane further comprises a pin insertion and extraction device for annularly arranged pins according to any one of claims 1 to 9, wherein the pin insertion and extraction device is used for integrally inserting and extracting the annularly arranged pins of the slewing bearing.

Images