Swing mechanism with vertical direction fixing device

Abstract

The utility model discloses a slewing mechanism with a vertical direction fixing device, and relates to the technical field of slewing mechanisms. The slewing mechanism comprises a fixed base. The pivotal bearing is arranged at the top of the fixed base and comprises a pivotal bearing outer ring and a pivotal bearing inner ring, the pivotal bearing outer ring is rotationally arranged outside the pivotal bearing inner ring, and the pivotal bearing inner ring is fixedly connected with the fixed base; the rotary component is rotationally arranged at the top of the rotary bearing and is fixedly connected with the outer ring of the rotary bearing; and the action mechanism is arranged on the top face of the rotary component in a penetrating mode and comprises a driving assembly and a pin shaft, and the driving assembly is used for enabling the pin shaft to move in the vertical direction. According to the utility model, an independent reversing device does not need to be mounted to realize locking and loosening, the locking cavity can be directly formed in the inner ring of the slewing bearing, and an independent module does not need to be additionally arranged to form the locking cavity, so that the slewing component is simpler in structure, and the volume of the slewing mechanism is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary mechanisms, in particular to a rotary mechanism with a vertical direction fixing device. Background Art

[0002] The slewing mechanism's direction-fixing device is a crucial component in the operation of excavators, cranes, fire-fighting aerial platforms, and other equipment. It reliably secures the slewing mechanism, preventing damage to components from vibration and impact during operation and releasing the locking restriction during slewing. To ensure rapid response, the direction-fixing device must operate swiftly and agilely between locked and released states, minimizing transition time. When locked, the direction-fixing device is subject to significant stress due to the inertia and impact forces of the slewing mechanism, so sufficient strength and rigidity are essential.

[0003] The traditional slewing mechanism's direction fixing device is a lever-type action mechanism, with its locking action pin installed on the slewing part of the vehicle body. When locking, the locking pin is inserted into the locking cavity reserved in the vehicle body chassis. However, the current traditional slewing mechanism has the following problems:

[0004] 1. Since the direction fixing device of the traditional rotary mechanism is a lever-type action mechanism, its pin shaft needs to change direction when locking and releasing. Therefore, a separate reversing device needs to be installed to achieve locking and releasing, and a separate module needs to be added to open the locking cavity, resulting in a more complex structure and larger volume of the rotary mechanism.

[0005] 2. Since the locking pin and the cavity are respectively installed on the rotating component and the chassis fixing component, the pin of the direction fixing device needs to be inserted into the locking cavity inside the chassis fixing component from the side, so the relative assembly accuracy of the locking pin and the locking cavity is required to be high. Utility Model Content

[0006] In view of the defects in the prior art, the technical problem solved by the present invention is: how to reduce the volume of the rotary mechanism.

[0007] To achieve the above objectives, the present invention provides a rotary mechanism with a vertical direction fixing device, comprising:

[0008] Fixed base;

[0009] A slewing bearing is disposed on top of the fixed base and includes a slewing bearing outer ring and a slewing bearing inner ring. The slewing bearing outer ring is rotatably disposed outside the slewing bearing inner ring, and the slewing bearing inner ring is fixedly connected to the fixed base.

[0010] A rotary component is rotatably disposed on the top of the rotary bearing and is fixedly connected to the outer ring of the rotary bearing;

[0011] The action mechanism is arranged on the top surface of the rotary component and includes a driving assembly and a pin shaft. The driving assembly is used to move the pin shaft in the vertical direction, and the pin shaft is used to be inserted into the locking cavity opened on the inner ring of the rotary bearing.

[0012] In one embodiment, the actuating mechanism further includes a guide sleeve, a mounting flange, a cartridge seat and a connecting flange. The pin shaft is movably arranged inside the guide sleeve. The top of the guide sleeve is provided with a cartridge seat through the mounting flange. The top of the cartridge seat is connected to the driving assembly through the connecting flange.

[0013] In one embodiment, the drive assembly includes a cylinder, a cylinder housing, a cylinder output shaft, a return spring and a connecting sleeve. The cylinder housing is arranged on the top of the cylinder seat through a connecting flange, and the cylinder is arranged inside the cylinder housing. One end of the cylinder output shaft is connected to the cylinder, and the other end thereof is located inside the cylinder seat. The end of the cylinder output shaft is fixedly connected to the connecting pin at the end of the pin shaft through a connecting sleeve, and one end of the return spring is connected to the connecting flange, and the other end thereof is connected to the pin shaft.

[0014] In one embodiment, a first positioning shoulder is provided on the connecting flange, a second positioning shoulder is provided on the pin shaft, one end of the return spring is clamped to the first positioning shoulder, and the other end thereof is clamped to the second positioning shoulder.

[0015] In one embodiment, a photoelectric travel switch is provided on the inner wall of the cylinder seat, and the photoelectric travel switch is used to identify the position of the second positioning shoulder.

[0016] In one embodiment, a positioning keyway is provided on the side surface of the pin shaft in the vertical direction, a set screw is passed through the side surface of the guide sleeve, and one end of the set screw is located inside the positioning keyway.

[0017] In one embodiment, the end of the pin shaft close to the locking cavity is tapered.

[0018] In one embodiment, the locking cavity is in a conical shape that matches the end of the pin.

[0019] In one embodiment, the action mechanism and the rotating component are fixedly connected via a bolt assembly.

[0020] In one embodiment, the slewing component is fixedly connected to the outer ring of the slewing bearing via a bolt assembly.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] The present invention has a slewing bearing disposed on the top of its fixed base, a slewing component disposed on the top of the slewing bearing, and an actuating mechanism extending through the top of the slewing component. During rotation, a driving assembly drives a pin to retract, thereby disengaging the pin from a locking cavity defined in the inner ring of the slewing bearing. The outer ring of the slewing bearing rotates synchronously with the slewing component, while the inner ring of the slewing bearing and the fixed base remain stationary. When locking is required, the driving assembly drives the pin to extend and insert into the locking cavity. Since the actuating mechanism is fixedly connected to the slewing component, the slewing component stops rotating. Compared to existing slewing mechanisms, the actuating mechanism of this slewing mechanism is a vertically retractable pin that can be directly inserted into or out of the locking cavity, eliminating the need for a separate reversing device to achieve locking and releasing. Furthermore, the locking cavity can be directly defined in the inner ring of the slewing bearing, eliminating the need for a separate module to define the locking cavity. Therefore, the structure of the slewing component is relatively simple, thereby reducing the size of the slewing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a rotary mechanism with a vertical direction fixing device according to an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 Front cross-sectional view of

[0025] Figure 3 This is a cross-sectional view of the action mechanism of an embodiment of the present utility model;

[0026] Figure 4 for Figure 3 Side cross-sectional view of .

[0027] In the figure: 1-acting mechanism, 2-slewing bearing, 201-slewing bearing outer ring, 202-slewing bearing inner ring, 203-locking cavity, 3-fixed base, 4-slewing component, 5-pin shaft, 6-guide sleeve, 7-mounting flange, 8-connecting pin shaft, 9-cylinder seat, 10-connecting sleeve, 11-reset spring, 12-connecting flange, 13-photoelectric travel switch, 14-cylinder output shaft, 15-setting screw, 16-cylinder housing, 17-cylinder, 18-first positioning shoulder, 19-second positioning shoulder. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0029] The rotary mechanism with vertical direction fixing device in the embodiment of the present utility model is shown in FIG. Figure 1-2As shown, it includes a fixed base 3, a slewing bearing 2 is provided on the top of the fixed base 3, and the slewing bearing 2 includes a slewing bearing outer ring 201 and a slewing bearing inner ring 202. The slewing bearing outer ring 201 is rotatably arranged outside the slewing bearing inner ring 202, and the slewing bearing inner ring 202 is fixedly connected to the fixed base 3, that is, the slewing bearing inner ring 202 will not rotate; a slewing component 4 is provided on the top of the slewing bearing 2, and the slewing component 4 is fixedly connected to the slewing bearing outer ring 201, that is, the slewing bearing outer ring 201 rotates with the slewing component 4; an action mechanism 1 is penetrated on the top surface of the slewing component 4, and the action mechanism 1 includes a driving assembly and a pin 5. The driving assembly is used to move the pin 5 in the vertical direction, and the pin 5 is used to be inserted into the locking cavity 203 opened on the slewing bearing inner ring 202.

[0030] It can be seen from this that the utility model is provided with a slewing bearing 2 on the top of its fixed base 3, and a slewing component 4 is provided on the top of the slewing bearing 2. An action mechanism 1 is penetrated on the top of the slewing component 4. When rotating, the driving component drives the pin shaft 5 to retract so that it disengages from the locking cavity 203 opened on the slewing bearing inner ring 202. The slewing bearing outer ring 201 rotates synchronously with the slewing component 4, and the slewing bearing inner ring 202 and the fixed base 3 are stationary. When locking is required, the driving component drives the pin shaft 5 to extend and insert into the locking cavity 203. Since the action mechanism 1 and the slewing component 4 are fixedly connected, the slewing component 4 stops rotating. Compared with the existing rotary mechanism, the action mechanism 1 of the rotary mechanism is a vertically telescopic pin shaft 5, which can be directly inserted into or disengaged from the locking cavity 203. There is no need to install a separate reversing device to achieve locking and loosening. The locking cavity 203 can be directly opened on the inner ring 202 of the rotary bearing. There is no need to add a separate module to open the locking cavity. Therefore, the structure of the rotary component is relatively simple, thereby reducing the volume of the rotary mechanism.

[0031] Preferably, see Figure 3 As shown, the action mechanism 1 also includes a guide sleeve 6, a mounting flange 7, a cartridge seat 9 and a connecting flange 12. The inner diameter of the guide sleeve 6 is slightly larger than the diameter of the pin 5. The pin 5 is movably arranged inside the guide sleeve 6. The guide sleeve 6 guides the pin 5 to avoid deviation in the telescopic direction of the pin 5. The top of the guide sleeve 6 is provided with a cartridge seat 9 through the mounting flange 7. The top of the cartridge seat 9 is connected to the drive assembly through the connecting flange 12.

[0032] Preferably, see Figure 3 As shown, a specific structure of a drive component is provided:

[0033] The driving assembly includes a cylinder 17, a cylinder housing 16, a cylinder output shaft 14, a return spring 11 and a connecting sleeve 10. The cylinder housing 16 is arranged on the top of the cylinder seat 9 through a connecting flange 12, and the cylinder 17 is arranged inside the cylinder housing 16. The cylinder housing 16 can prevent the cylinder 17 from colliding with the outside and being damaged during the rotation of the action mechanism 1, so as to improve the service life of the device; one end of the cylinder output shaft 14 is connected to the cylinder 17, and the other end is located inside the cylinder seat 9. The end of the cylinder output shaft 14 is fixedly connected to the connecting pin 8 at the end of the pin shaft 5 through a connecting sleeve 10. Of course, the connecting sleeve 10 and the connecting pin shaft 8 here can be replaced with other connecting components. It is only necessary to satisfy the fixed connection between the cylinder output shaft 14 and the pin shaft 5, so as to provide the cylinder output shaft 14 to drive the pin shaft 5 to move. One end of the return spring 11 is connected to the connecting flange 12, and the other end is connected to the pin shaft 5.

[0034] Furthermore, a connection method of the return spring 11 is provided:

[0035] A first positioning shoulder 18 is provided on the connecting flange 12 , and a second positioning shoulder 19 is provided on the pin shaft 5 . One end of the return spring 11 is engaged with the first positioning shoulder 18 , and the other end thereof is engaged with the second positioning shoulder 19 .

[0036] Another connection method of the return spring 11 is provided:

[0037] The connecting flange 12 is connected to one end of the return spring 11 through a first locking member, and the pin 5 is connected to the other end of the return spring 11 through a second locking member.

[0038] Furthermore, a photoelectric travel switch 13 is provided on the inner wall of the cylinder seat 9 , and the photoelectric travel switch 13 is used to identify the position of the second positioning shoulder 19 .

[0039] It should be noted that the second positioning shoulder 19 is an inverted T-shaped structure, the reset spring 11 is sleeved in the narrower part, and the photoelectric limit switch 13 determines whether the pin shaft 5 has moved into place by identifying the wider part, that is, whether the pin shaft 5 is fully inserted into the locking cavity 203, or completely pulled out from the locking cavity 203.

[0040] Preferably, see Figure 3-4 As shown, a positioning keyway is provided on the side of the pin shaft 5 in the vertical direction, and a set screw 15 is passed through the side of the guide sleeve 6, with one end of the set screw 15 located inside the positioning keyway; alternatively, the set screw 15 passes through the positioning keyway, and its two ends are respectively fixed to both sides of the guide sleeve 6.

[0041] It should be noted that the above design can prevent the pin shaft 5 from rotating during the movement process.

[0042] Preferably, the end of the pin 5 close to the locking cavity 203 is tapered.

[0043] Furthermore, the locking cavity 203 is tapered to match the end of the pin 5 .

[0044] It is understandable that the pin 5 and the locking cavity 203 can also be designed into other shapes, such as a cylinder or a cuboid, but the shapes of the two are designed to match each other in order to avoid the jamming phenomenon during the locking and releasing actions;

[0045] Furthermore, flattening both sides of the conical surface can ensure that there is no air compression when the pin 5 is inserted into the locking cavity 203.

[0046] Preferably, the action mechanism 1 and the rotating component 4 are fixedly connected by a bolt assembly.

[0047] Preferably, the rotary component 4 is fixedly connected to the rotary bearing outer ring 201 by a bolt assembly.

[0048] It should be noted that the connection method provided above is only one of the connection methods, and connection can also be performed through other fixed connection methods, such as locks, snap connectors, etc.

[0049] Preferably, the action process of the rotary mechanism is provided:

[0050] When the direction is locked, the rotary component 4 rotates to a fixed position, the cylinder 17 is depressurized, and the pin 5 is inserted into the locking cavity 203 of the inner ring 202 of the rotary bearing under the action of the return spring 11. After the locking action is in place, the second positioning shoulder 19 at the end of the pin 5 enters the recognition range of the photoelectric travel switch 13, and the photoelectric travel switch 13 gives a locking signal.

[0051] When the direction is released, the cylinder 17 is pressurized, and the cylinder output shaft 14 drives the pin 5 to be pulled out of the locking cavity 203 of the inner ring 202 of the rotary bearing to achieve release. During the release process, the pin 5 compresses the reset spring 11. After the release action is in place, the second positioning shoulder 19 at the end of the pin 5 enters the recognition range of the photoelectric travel switch 13, and the photoelectric travel switch 13 gives a release in place signal.

[0052] In the description of this application, it should be noted that the terms "upper" and "lower" 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 this application and simplifying the description, and do not indicate or imply 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 this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0054] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A slewing mechanism with a vertical direction fixing device, characterized in that: It includes: A fixed base (3); A slewing bearing (2) is arranged on the top of the fixed base (3), and comprises a slewing bearing outer ring (201) and a slewing bearing inner ring (202), wherein the slewing bearing outer ring (201) is rotatably arranged outside the slewing bearing inner ring (202), and the slewing bearing inner ring (202) is fixedly connected to the fixed base (3); A slewing component (4) rotatably disposed on the top of the slewing bearing (2) and fixedly connected to the outer ring (201) of the slewing bearing; The action mechanism (1) is arranged on the top surface of the rotating component (4), and comprises a driving assembly and a pin (5). The driving assembly is used to move the pin (5) in a vertical direction, and the pin (5) is used to be inserted into a locking cavity (203) provided on the inner ring (202) of the rotating bearing.

2. The swivel mechanism with a vertical direction fixing device according to claim 1, characterized in that: The action mechanism (1) further comprises a guide sleeve (6), a mounting flange (7), a cartridge seat (9) and a connecting flange (12); the pin shaft (5) is movably arranged inside the guide sleeve (6); the top of the guide sleeve (6) is provided with a cartridge seat (9) via the mounting flange (7); the top of the cartridge seat (9) is connected to the driving assembly via the connecting flange (12).

3. The swivel mechanism with a vertical direction fixing device as claimed in claim 2, characterized in that: The driving assembly comprises a cylinder (17), a cylinder housing (16), a cylinder output shaft (14), a return spring (11) and a connecting sleeve (10); the cylinder housing (16) is arranged on the top of a cylinder seat (9) via a connecting flange (12); the cylinder (17) is arranged inside the cylinder housing (16); one end of the cylinder output shaft (14) is connected to the cylinder (17), and the other end thereof is located inside the cylinder seat (9); the end of the cylinder output shaft (14) is fixedly connected to a connecting pin (8) at the end of a pin shaft (5) via a connecting sleeve (10); one end of the return spring (11) is connected to the connecting flange (12), and the other end thereof is connected to the pin shaft (5).

4. The swivel mechanism with a vertical direction fixing device as claimed in claim 2, characterized in that: The connecting flange (12) is provided with a first positioning shoulder (18), the pin shaft (5) is provided with a second positioning shoulder (19), one end of the return spring (11) is clamped with the first positioning shoulder (18), and the other end thereof is clamped with the second positioning shoulder (19).

5. The swivel mechanism with a vertical direction fixing device as claimed in claim 4, characterized in that: A photoelectric travel switch (13) is arranged on the inner wall of the cylinder seat (9), and the photoelectric travel switch (13) is used to identify the position of the second positioning shoulder (19).

6. The swivel mechanism with a vertical direction fixing device as claimed in claim 2, characterized in that: A positioning keyway is provided on the side of the pin shaft (5) in the vertical direction, a set screw (15) is penetrated through the side of the guide sleeve (6), and one end of the set screw (15) is located inside the positioning keyway.

7. The swivel mechanism with a vertical direction fixing device according to claim 1, characterized in that: One end of the pin shaft (5) close to the locking cavity (203) is tapered.

8. The swivel mechanism with a vertical direction fixing device as claimed in claim 7, characterized in that: The locking cavity (203) is in a conical shape that matches the end of the pin shaft (5).

9. The swivel mechanism with a vertical direction fixing device according to claim 1, characterized in that: The action mechanism (1) and the rotating component (4) are fixedly connected via a bolt assembly.

10. The swivel mechanism with a vertical direction fixing device according to claim 1, characterized in that: The slewing component (4) is fixedly connected to the slewing bearing outer ring (201) via a bolt assembly.

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