JP5850692B2 - Swivel post device - Google Patents

Description

  The present invention relates to a swivel post device.

  In general, a construction machine such as a jib crane has a configuration in which an upper turning body is provided on a post or a lower traveling body standing from the ground so as to be turnable via a turning device.

  As the turning device, for example, there is a turning ring 1 as shown in FIGS. 8 and 9, which includes an inner ring 2 attached to the post and the lower traveling body (not shown) by tightening a bolt 3 a, a bolt An outer ring 4 attached to an upper revolving body (not shown) by tightening 3b, a sphere 5 is interposed between the outer ring 4 and the inner ring 2, and an inner tooth 6 is disposed on the inner peripheral surface of the inner ring 2. Is engraved. In FIG. 9, 2a and 4a are seal members provided so as to close the gap between the inner ring 2 and the outer ring 4, and are filled between the inner ring 2 and the outer ring 4 by the seal members 2a and 4a. The grease for lubricating the sphere 5 is prevented from leaking outside.

  Further, a hydraulic or electric motor 7 and a speed reducer 8 are arranged on the upper swing body, and a pinion 9 that meshes with the inner teeth 6 of the inner ring 2 in the swing ring 1 is fitted on the output shaft of the speed reducer 8. Thus, a swivel device is constructed.

  In the turning device as described above, when the pinion 9 is rotated via the speed reducer 8 by driving the motor 7, the inner ring 2 in the turning ring 1 is fixed to the post or the lower traveling body side. While rotating, it rolls along the inner teeth 6 of the inner ring 2, and the upper swing body supported by the outer ring 4 in the swing ring 1 rotates with respect to the post and the lower traveling body.

  For example, Patent Document 1 shows a general technical level related to the above-described swivel device.

JP 2011-142766 A

  However, the swivel ring 1 as the swivel device as described above has high installation accuracy requirements, cannot cope with the eccentricity associated with the swing of the swivel shaft, and is very expensive and has a long delivery time. It had the disadvantage that it could not be done easily.

  In addition to the swivel ring 1, the swivel device includes, for example, a foot step bearing 10 as shown in FIG. 10, which is provided on the base 11 at the lower end of a support column 12 extending in the vertical direction. The pivot pin 13 is supported in a vertical direction by a spherical thrust roller bearing 14 that receives a compressive load in the vertical direction and a spherical radial bearing 15 that receives a load in a direction intersecting the axis O of the pivot pin 13 in a vertical direction. In addition, it is possible to cope with a load in the lateral direction and to cope with eccentricity associated with the swing of the support column 12.

  However, in the foot step bearing 10, due to the capability of the spherical thrust roller bearing 14, it is difficult to cope with a very large compressive load acting on the support column 12, while the load at which the support column 12 tends to rise is a spherical radial. Since the shape is received on the upper surface side of the bearing 15, it is still difficult to cope with a large load, and the installation accuracy is not as high as that of the swivel ring 1, but it corresponds to the eccentricity caused by the swinging of the column 12. Therefore, the rotational center C of the spherical radial bearing 15 and the spherical thrust roller bearing 14 needs to coincide with each other, and the arrangement is limited.

  In addition to the swivel ring 1 and the foot step bearing 10, the swivel device includes, for example, a so-called center post, and the center post can support a lateral load. However, it cannot receive a load in the vertical direction.

  In view of such a situation, the present invention can cope with a large compressive load in the vertical direction and a lateral load, can also cope with the eccentricity associated with the swinging of the support column, and can easily exchange parts. A swivel post device is to be provided.

The present invention is a base post provided with a base flange at the upper end of a base post body fixedly arranged around an axis extending in the vertical direction;
A swivel post provided with a swivel flange at a lower end of a swivel post main body disposed on an axis extension line of the base post, and the swivel flange is slidably mounted on the base flange;
A main bushing interposed between the swivel flange of the swivel post and the base flange so as to receive a vertical compressive load;
The swingably distribution by spherical bushings provided in the upper portion of the swing post on the outer circumference of the pivotally mounted and the connecting pin through the connecting pin extending in the axial perpendicular direction of the base post with respect to the axis of the base post A supporting column,
A flange receiving unit that supports in the form of surrounding the base flange and swivel flange,
An upper surface bush attached to the flange receiving unit so as to receive an upward tensile load acting on the support column in contact with the upper surface of the turning flange;
A swivel post device comprising an outer peripheral surface bush attached to the flange receiving unit so as to receive a load in a direction perpendicular to the axis of the base post acting on the support column in contact with the outer peripheral surface of the swivel flange. It depends on.

  According to the above means, the following operation can be obtained.

  As described above, the compressive load in the vertical direction is received by the main bush, and the upward tensile load acting on the column is received via the upper surface bush contacting the upper surface of the swivel flange and the base post acting on the column. If the load in the direction perpendicular to the axis of the bearing is received via the outer peripheral surface bush that is in contact with the outer peripheral surface of the swivel flange, the pressure receiving area can be arbitrarily set, and a very large compressive load acts on the column. Even if a tensile load is applied, or a load in a direction perpendicular to the axis of the base post is applied, it is possible to cope with it.

  In the swivel post device, an upper surface bush that is disposed so as to sandwich the lower surface of the base flange and the upper surface of the swivel flange and is in contact with the upper surface of the swivel flange, and an outer peripheral surface bush that is in contact with the outer peripheral surface of the swivel flange are attached. By connecting and arranging a plurality of U-shaped blocks in the circumferential direction of the base flange and the swivel flange, the flange receiving unit can be configured. In this way, the blocks are sequentially separated during maintenance. Accordingly, it is possible to easily replace the upper surface bush and the outer peripheral surface bush attached to the block of the flange receiving unit. Also, the main bushing provided between the base flange and the swivel flange can be easily replaced by pulling out the connecting pin and removing the swivel post from between the base post and the strut while the column is supported by a jack. Is possible.

  Further, in the turning post device, it is effective to apply to a jib crane in which a jib is mounted up and down freely on the upper part of a leg frame arranged to be turned by driving a turning traveling wheel with the support column as a turning center. In the case of such a jib crane, the displacement accompanying the vertical movement when the turning wheel rolls during turning is transmitted to the support column. A spherical bush is provided on the outer periphery of the connection pin, and the support column is provided by the spherical bush. Is disposed so as to be swingable with respect to the axis of the base post, so that the displacement accompanying the up and down movement when the turning wheel rolls is reliably absorbed, and the support post, the turning post and the base post are absorbed. There is no worry that excessive force will work.

  As a result, compared to the conventional swirl ring, high accuracy is not required for installation, and it can cope with eccentricity caused by swinging of the column. Furthermore, the price is reduced and delivery time is shortened, and parts can be replaced easily. Can be done.

  In addition, unlike the conventional foot step bearing, the main bush is used instead of the spherical thrust roller bearing, so that it is possible to cope with a very large compressive load acting on the column, while the column is likely to float. Since the load to be received is received by the upper surface bush instead of the spherical radial bearing, it is possible to cope with a large load.

  Furthermore, unlike a conventional center post, it can receive not only a lateral load but also a vertical load.

  According to the swivel post device of the present invention, it is possible to cope with large compressive loads in the vertical direction and lateral loads, and to cope with the eccentricity accompanying the swing of the support column, and further, it is possible to easily replace the parts. An excellent effect can be achieved.

It is sectional drawing which shows the Example of the turning post apparatus of this invention. It is a perspective view which shows the state which partially decomposed | disassembled the block of the flange receiving unit in the Example of the turning post apparatus of this invention. It is a disassembled perspective view of the Example of the turning post apparatus of this invention. It is a perspective view which shows the block of the flange receiving unit in the Example of the turning post apparatus of this invention. It is a top view of the flange receiving unit in the Example of the turning post apparatus of this invention, Comprising: It is a VV arrow equivalent view of FIG. It is a side view which shows an example of the jib crane to which the turning post apparatus of this invention is applied. It is a figure which shows the work procedure at the time of the maintenance in the Example of the rotation post apparatus of this invention, Comprising: (a) is a figure which shows the case where the upper surface bush and outer peripheral surface bush attached to the block of the flange receiving unit are replaced | exchanged, (b) is a diagram showing a first procedure for exchanging the main bush provided between the base flange and the swivel flange, and (c) is for exchanging the main bush provided between the base flange and the swivel flange. It is a figure which shows the 2nd procedure in the case of doing. It is a general | schematic perspective view which shows an example of the conventional turning ring. It is IX-IX sectional drawing of FIG. It is sectional drawing which shows an example of the conventional foot step bearing.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 to 7 show an embodiment of a swivel post device according to the present invention, in which a base post 16 is formed by providing a base flange 16b at the upper end of a base post body 16a fixedly arranged about an axis O extending in the vertical direction. At the same time, a turning flange 17b is provided at the lower end of the turning post body 17a disposed on the axis O extension of the base post 16 to form the turning post 17, and the turning flange 17b of the turning post 17 is connected to the base flange. The support bracket 17c is mounted on the support bracket 17c so as to be pivotable through a main bush 18 that receives a compressive load in the vertical direction on the 16b, and is perpendicular to the axis O of the base post 16 with respect to the support bracket 17c. A connecting bracket 20a integrated with the lower portion of the support column 20 is pivotally attached to the connecting bracket 2 via a connecting pin 19 extending to A spherical bush 21 is interposed between the a and the connecting pin 19, and the spherical bush 21 is disposed so that the support column 20 can swing with respect to the axis O of the base post 16, and the base flange 16b and A flange receiving unit 22 is provided to support the swivel flange 17b so as to surround it.

  In the case of this embodiment, the flange receiving unit 22 has a U-shaped block 22a arranged so as to sandwich the lower surface of the base flange 16b and the upper surface of the swivel flange 17b, as shown in FIGS. Are connected and arranged in the circumferential direction of the base flange 16b and the swivel flange 17b. On the inner surface side of each block 22a, an upper surface bush 23 in contact with the upper surface of the swivel flange 17b and the swivel flange 17b. The base post 16 is attached to the outer peripheral surface bush 24 in contact with the outer peripheral surface, receives an upward tensile load acting on the support column 20 via the upper surface bush 23 in contact with the upper surface of the turning flange 17b, and acts on the support column 20. The outer peripheral surface bush 24 that contacts the outer peripheral surface of the turning flange 17b with a load perpendicular to the axis O of And are to receive in.

  As shown in FIGS. 4 and 5, connecting pieces 22b projecting radially are provided on the upper and lower portions of the outer peripheral surface of each block 22a, and the links 22c are spanned between the connecting pieces 22b of the adjacent blocks 22a. The pins 22d are dropped or connected by bolting.

  The turning post device of the present embodiment can be applied to various cranes. For example, as shown in FIG. 6, legs that are turnable by driving a turning wheel 25 with the support column 20 as a turning center. The present invention can be applied to a jib crane 28 in which a jib 27 is attached to an upper part of a frame 26 so as to be raised and lowered. In this case, the connecting pin 19 is arranged in parallel with the undulation center axis 29 of the jib 27, and the turning wheel 25 is a rail laid in a circle around the axis O. It rolls over 30.

  Next, the operation of the above embodiment will be described.

  As described above, the compressive load in the vertical direction is received by the main bush 18, and the upward tensile load acting on the support 20 is received through the upper surface bush 23 in contact with the upper surface of the turning flange 17b and applied to the support 20. If the load in the direction perpendicular to the axis O of the acting base post 16 is received via the outer peripheral bushing 24 in contact with the outer peripheral surface of the swivel flange 17b, the pressure receiving area can be arbitrarily set. When applied to a jib crane 28 as shown in FIG. 2, a very large compressive load acts on the support column 20 before lifting a heavy object, and even if a tensile load acts when the heavy object is suspended, it is possible to cope with it. Further, even if a load in a direction perpendicular to the axis O of the base post 16 is applied, it is possible to cope with it.

  In the case of the jib crane 28 as shown in FIG. 6, it cannot be said that the mounting accuracy of the rail 30 on which the turning wheel 25 rolls is very high, and when the turning wheel 25 rolls on the rail 30 during turning. Displacement due to vertical movement is transmitted to the support column 20. A spherical bush 21 is interposed between the connection bracket 20 a and the connection pin 19, and the support 20 is connected to the axis of the base post 16 by the spherical bush 21. Since the swing traveling wheel 25 rolls on the rail 30, the displacement accompanying the vertical movement is reliably absorbed, and the support column 20 and the swing post 17 are disposed. And there is no worry that an excessive force is applied to the base post 16.

  On the other hand, the flange receiving unit 22 has a U-shaped block 22a disposed so as to sandwich the lower surface of the base flange 16b and the upper surface of the turning flange 17b, and the circumferential direction of the base flange 16b and the turning flange 17b. In the maintenance, the pin 22d is pulled out from the connecting piece 22b to remove the link 22c, and the blocks 22a are sequentially separated as shown in FIG. The upper surface bush 23 and the outer peripheral surface bush 24 attached to the block 22a of the receiving unit 22 can be easily exchanged.

  Further, as shown in FIG. 7 (b), the auxiliary frame 31 is attached to the support column 20, and the pin 22d is pulled out from the connecting piece 22b and the link 22c is removed in the same manner as described above, and then as shown in FIG. 7 (c). If the jack 32 is placed under the auxiliary frame 31 and the weight of the jib crane 28 is supported by the jack 32, the connecting pin 19 is pulled out and the turning post 17 is removed from between the base post 16 and the column 20. The main bush 18 provided between the base flange 16b and the turning flange 17b can be easily replaced.

  As a result, compared with the conventional swivel ring 1 as shown in FIGS. 8 and 9, high accuracy is not required for installation, it can cope with eccentricity caused by swinging of the support column 20, and the price can be kept low. As a result, the delivery time is shortened and parts can be replaced easily.

  Also, unlike the conventional foot step bearing 10 as shown in FIG. 10, the use of the main bush 18 instead of the spherical thrust roller bearing 14 makes it possible to cope with a very large compressive load acting on the column 20. On the other hand, the load on which the support column 20 tends to float is received not by the spherical radial bearing 15 but by the upper surface bush 23, so that it is possible to cope with a large load.

  Furthermore, unlike a conventional center post, it can receive not only a lateral load but also a vertical load.

  In this way, it is possible to cope with a large compressive load in the vertical direction and a lateral load, and it can also correspond to the eccentricity accompanying the swing of the support column 20, and the parts can be easily replaced.

  The swivel post device of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

16 base post 16a base post body 16b base flange 17 swivel post 17a swivel post body 17b swivel flange 18 main bush 19 connecting pin 20 support 20a connecting bracket 21 spherical bush 22 flange receiving unit 22a block 23 upper surface bush 24 outer peripheral surface bush 25 turning running Wheel 26 Leg frame 27 Jib 28 Jib crane O Axis

Claims (3)

A base post provided with a base flange at the upper end of a base post body fixedly arranged around an axis extending in the vertical direction;
A swivel post provided with a swivel flange at a lower end of a swivel post main body disposed on an axis extension line of the base post, and the swivel flange is slidably mounted on the base flange;
A main bushing interposed between the swivel flange of the swivel post and the base flange so as to receive a vertical compressive load;
The swingably distribution by spherical bushings provided in the upper portion of the swing post on the outer circumference of the pivotally mounted and the connecting pin through the connecting pin extending in the axial perpendicular direction of the base post with respect to the axis of the base post A supporting column,
A flange receiving unit that supports in the form of surrounding the base flange and swivel flange,
An upper surface bush attached to the flange receiving unit so as to receive an upward tensile load acting on the support column in contact with the upper surface of the turning flange;
A swivel post device comprising an outer peripheral surface bush attached to the flange receiving unit so as to receive a load in a direction perpendicular to the axis of the base post acting on the support column in contact with the outer peripheral surface of the swivel flange. .   A U-shaped cross section in which an upper surface bush that is disposed so as to sandwich the lower surface of the base flange and the upper surface of the swivel flange and is in contact with the upper surface of the swivel flange and an outer peripheral surface bush that is in contact with the outer peripheral surface of the swivel flange The turning post device according to claim 1, wherein the flange receiving unit is configured by connecting and arranging a plurality of blocks in a circumferential direction of the base flange and the turning flange.   The swivel post device according to claim 1 or 2, wherein the swivel post device is applied to a jib crane in which a jib is undulated and mounted on an upper part of a leg frame that is pivotably disposed by driving of a swivel traveling wheel with the support column as a swivel center.

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