Rotary arm device

Abstract

The invention discloses a rotary arm device which comprises a shifting fork device and is characterized in that the shifting fork device is connected with a bearing seat assembling device through a key, the bearing seat assembling device is connected with a planetary chain wheel device through a key, and the bearing seat assembling device is fixedly connected with a swing arm device through a bolt. A chain tensioning device is fixed on the swing arm through a bolt, and the tensioning degree of the chain is adjusted through the bolt; the integrated swing arm prevents the swing arm from being stressed and deformed, the rotary supporting fork uses the integrated bearing seat, quick replacement is facilitated, a framework oil seal, an O-shaped ring and a labyrinth sleeve are installed on the bearing seat, the rotary supporting fork is suitable for working in severe environments such as water and ferric oxide, and the rotary supporting fork is simple in structure, low in failure rate and convenient to maintain.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment, in particular to a slewing arm device suitable for harsh environments such as water and iron oxide. Background Art

[0002] At present, the slewing arms used by seamless steel pipe companies in the same industry have the following problems: 1. The conventional slewing arms are open-type swing arms, which are easily deformed under stress; 2. The fork shaft and copper washers are subject to large amounts of daily rust and wear, and the machine replacement time is long. The service life of the fork shaft and copper washers is 6 months; 3. The slewing arms are in harsh environments such as high temperature, iron oxide, and water, and the failure rate and maintenance cost are too high. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a swivel arm device to solve the problems of high failure rate and high maintenance cost of the swivel arm.

[0004] The technical solution provided by the present invention is: a slewing arm device, including a fork device, which is special in that the fork device is connected to the bearing seat assembly device through a key, the bearing seat assembly device is connected to the planetary sprocket device through a key, the bearing seat assembly device is fixedly connected to the swing arm device through bolts, a chain tensioner is fixed to the swing arm device through bolts, and the position of the chain tensioner is adjusted through bolts, thereby achieving the purpose of adjusting the chain tension; The shift fork device is composed of a shift fork, a first shaft end baffle, and a key; the shift fork is axially fixed to the shaft through the first shaft end baffle, and the shift fork and the shaft are radially fixed through the key, and the shift fork is an integrated structure; The bearing seat assembly device is composed of a positioning sleeve, a first skeleton oil seal, a labyrinth retaining ring, a shaft, a first O-ring, a bearing seat, a second skeleton oil seal, a second O-ring, a bearing pressure cover, a first spherical roller bearing, a bearing positioning sleeve, a second spherical roller bearing, and a bearing outer ring spacer; two sets of spherical roller bearings are arranged in the bearing seat, namely, the first spherical roller bearing and the second spherical roller bearing; the bearing pressure cover is fixed on the swing arm, the first spherical roller bearing positions the outer ring of the bearing through the bearing pressure cover, the shaft shoulder positions the inner ring of the bearing, and the second spherical roller bearing is fixed on the swing arm. The spherical roller bearing positions the outer ring of the bearing through the bearing seat, and the positioning sleeve positions the inner ring of the bearing; the first spherical roller bearing and the second spherical roller bearing are positioned by the bearing positioning sleeve, and the outer ring of the bearing is positioned by the bearing outer ring spacer sleeve; the first skeleton oil seal and the first O-ring are installed on one side of the bearing seat, and the second skeleton oil seal and the second O-ring are installed on the other side. Labyrinth retaining rings are installed on both sides of the bearing seat, one side cooperates with the labyrinth groove of the shift fork, and the other side cooperates with the welded labyrinth sleeve to prevent water, iron oxide and other debris from entering the bearing seat and damaging the bearing; The planetary sprocket device is composed of a planetary sprocket, a first shaft end baffle, a welded labyrinth sleeve, and a key; the first shaft end baffle is axially fixed to the shaft, the planetary sprocket is radially fixed to the shaft through a key, and the welded labyrinth sleeve is welded to the planetary sprocket; The swing arm device is composed of a swing arm and a counterweight, the swing arm and the counterweight are fixed on the swing arm shaft, and the swing arm is an integrated swing arm; The chain tensioner is composed of a second shaft end baffle, a tensioning wheel shaft, a second shaft sleeve, and a tensioning sprocket; the second shaft end baffle fixes the second shaft sleeve and the tensioning sprocket on the tensioning wheel shaft by bolts, and the second shaft sleeve cooperates with the tensioning sprocket to realize the rotation of the tensioning sprocket.

[0005] Furthermore, the bearing seat assembly device is an integrated assembly and can be assembled and disassembled as a whole.

[0006] Furthermore, the chain adjustment device is fixed with two stainless steel M24 adjustment bolts.

[0007] The beneficial effects of the present invention are as follows: 1. An integrated swing arm is adopted and a reinforcing rib plate is added to prevent the swing arm from being deformed under stress; 2. An integrated bearing seat is used for the rotation of the shift fork, and bearings are used inside to avoid wear and tear, which is convenient for quick replacement, and the service life of the worn parts is increased from 6 months to more than 3 years; 3. Skeleton oil seals, O-rings and labyrinth sleeves are installed on both sides of the bearing seat to adapt to working in harsh environments such as water and iron oxide, and the failure rate and maintenance cost are greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the parts assembly structure of the present invention.

[0009] In the figure: 2.1 fork device, 2.2 bearing seat assembly device, 2.3 planetary sprocket device, 2.4 swing arm device, 2.5 chain tensioner, 3 key, 4 fork, 5 positioning sleeve, 6 first skeleton oil seal, 8 labyrinth retaining ring, 9 shaft, 10 first O-ring, 11 bearing seat, 12 second shaft end baffle, 13 tensioner shaft, 14 swing arm, 15 counterweight, 17 second shaft sleeve, 18 tensioner sprocket, 22 second skeleton oil seal, 23 welding labyrinth sleeve, 24 planetary sprocket, 26 second O-ring, 27 bearing gland, 28 first spherical roller bearing, 29 bearing positioning sleeve, 30 second spherical roller bearing, 31 first shaft end baffle, 32 bearing outer ring spacer. DETAILED DESCRIPTION

[0010] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings.

[0011] like Figure 1 , 2As shown, a slewing arm device is composed of a fork device 2.1, a bearing seat assembly device 2.2, a planetary sprocket device 2.3, a swing arm device 2.4, and a chain tensioning device 2.5; The shift fork device 2.1 is composed of a shift fork 4, a first shaft end baffle 31, and a key 3; the shift fork 4 is an integrated structure, the shift fork 4 is axially fixed to the shaft 9 through the first shaft end baffle 31, and the shift fork 4 and the shaft 9 are radially fixed through the key 3, which facilitates the normal transmission of torque and avoids keyway wear caused by improper installation of the two-piece shift fork; The bearing seat assembly device 2.2 is an integrated assembly and can be disassembled and assembled as a whole. It consists of a positioning sleeve 5, a first skeleton oil seal 6, a labyrinth retaining ring 8, a shaft 9, a first O-ring 10, a bearing seat 11, a second skeleton oil seal 22, a second O-ring 26, a bearing pressure cover 27, a first spherical roller bearing 28, a bearing positioning sleeve 29, a second spherical roller bearing 30, and a bearing outer ring spacer 32; two sets of spherical roller bearings, namely the first spherical roller bearing 28 and the second spherical roller bearing 30, are installed in the bearing seat 11; the bearing pressure cover 27 is fixed to the swing arm 14 by bolts, the first spherical roller bearing 28 is positioned on the bearing outer ring through the bearing pressure cover 27, and the shaft 9 The inner ring of the bearing is positioned by the shoulder, the outer ring of the bearing is positioned by the second spherical roller bearing 30 through the bearing seat 11, the inner ring of the bearing is positioned by the positioning sleeve 5, the inner ring of the bearing is positioned by the bearing positioning sleeve 29 between the first spherical roller bearing 28 and the second spherical roller bearing 30, and the outer ring of the bearing is positioned by the bearing outer ring spacer 32; the first skeleton oil seal 6 and the first O-ring 10 are installed on one side of the bearing seat 11, and the second skeleton oil seal 22 and the second O-ring 26 are installed on the other side, and the labyrinth retaining ring 8 is installed on both sides of the bearing seat 11, one side cooperates with the labyrinth groove of the shift fork 4, and the other side cooperates with the welded labyrinth sleeve 23 to prevent water, iron oxide and other debris from entering the bearing seat and damaging the bearing; The planetary sprocket device 2.3 is composed of a planetary sprocket 24, a first shaft end baffle 31, a welded labyrinth sleeve 23, and a key 3; the first shaft end baffle 31 is axially fixed to the shaft 9, the planetary sprocket 24 is radially fixed to the shaft 9 through the key 3, and the welded labyrinth sleeve 23 is welded to the planetary sprocket 24; The swing arm device 2.4 is composed of a swing arm 14 and a counterweight 15, wherein the swing arm 14 and the counterweight 15 are fixed to the swing arm shaft by hexagon socket bolts, wherein the swing arm 14 is an integrated swing arm; The chain tensioner 2.5 is composed of a second shaft end baffle 12, a tensioner shaft 13, a second shaft sleeve 17, and a tensioner sprocket 18; the second shaft end baffle 12 fixes the second shaft sleeve 17 and the tensioner sprocket 18 to the tensioner shaft 13 by bolts, and the second shaft sleeve 17 cooperates with the tensioner sprocket 18 to realize the rotation of the tensioner sprocket 18; The fork device 2.1 is connected to the bearing seat assembly device 2.2 through a key, the planetary sprocket device 2.3 is connected to the bearing seat assembly device 2.2 through a key, the bearing seat assembly device 2.2 is fixedly connected to the swing arm device 2.4 through bolts, the chain tensioner 2.5 is fixed to the swing arm 2.4 through two stainless steel M24 adjusting bolts, and the position of the chain tensioner 2.5 is adjusted by adjusting the bolts, thereby achieving the purpose of adjusting the chain tension.

[0012] A swivel arm device of the present invention is mainly used for the lateral movement of steel pipes. Its working principle is as follows: the transmission shaft is driven to rotate by a motor and a gear reducer, and the transmission shaft drives the swivel arm device to perform circular rotational motion. A double-row roller chain is used to ensure that the direction of the fork is always upward, thereby realizing the lateral movement of the steel pipe.

[0013] It should be understood that the technical features not elaborated in detail in this specification belong to the prior art. Although the implementation methods of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation methods, which are merely illustrative and not restrictive. Ordinary technicians in this field can make more forms under the enlightenment of the present invention without departing from the scope of protection of the present invention and the claims, which are all within the protection scope of the present invention.

Claims

1. A slewing arm device, comprising a fork device (2.1), characterized in that: The shift fork device (2.1) is connected to the bearing seat assembly device (2.2) via a key, the bearing seat assembly device (2.2) is connected to the planetary sprocket device 2.3 via a key, the bearing seat assembly device (2.2) is fixedly connected to the swing arm device (2.4) via bolts, the chain tensioning device (2.5) is fixed to the swing arm device (2.4) via bolts, and the position of the chain tensioning device (2.5) is adjusted via bolts, thereby achieving the purpose of adjusting the chain tension; The shift fork device (2.1) is composed of a shift fork (4), a first shaft end baffle (31), and a key (3); the shift fork (4) is axially fixed to the shaft (9) via the first shaft end baffle (31), the shift fork (4) and the shaft (9) are radially fixed via the key (3), and the shift fork (4) is an integrated structure; The bearing seat assembly device (2.2) is composed of a positioning sleeve (5), a first skeleton oil seal (6), a labyrinth retaining ring (8), a shaft (9), a first O-ring (10), a bearing seat (11), a second skeleton oil seal (22), a second O-ring (26), a bearing cover (27), a first spherical roller bearing (28), a bearing positioning sleeve (29), a second spherical roller bearing (30), and a bearing outer ring spacer (32); two sets of spherical roller bearings are arranged in the bearing seat (11), namely, a first spherical roller bearing (28) and a second spherical roller bearing (30); the bearing cover (27) is fixed on the swing arm (14); the first spherical roller bearing (28) is positioned on the bearing outer ring through the bearing cover (27); and the shaft (9) shoulder The inner ring of the bearing is positioned; the second spherical roller bearing (30) positions the outer ring of the bearing through the bearing seat (11); the positioning sleeve (5) positions the inner ring of the bearing; the inner ring of the bearing is positioned between the first spherical roller bearing (28) and the second spherical roller bearing (30) through the bearing positioning sleeve (29); the outer ring of the bearing is positioned by the bearing outer ring spacer (32); a first skeleton oil seal (6) and a first O-ring (10) are installed on one side of the bearing seat (11); a second skeleton oil seal (22) and a second O-ring (26) are installed on the other side; labyrinth retaining rings (8) are respectively installed on both sides of the bearing seat (11), one side cooperates with the labyrinth groove of the shift fork (4), and the other side cooperates with the welded labyrinth sleeve (23) to prevent water, iron oxide and other debris from entering the bearing seat to damage the bearing; The planetary sprocket device (2.3) is composed of a planetary sprocket (24), a first shaft end baffle (31), a welded labyrinth sleeve (23), and a key (3); the first shaft end baffle (31) is axially fixed to the shaft (9), the planetary sprocket (24) is radially fixed to the shaft (9) via the key (3), and the welded labyrinth sleeve (23) is welded to the planetary sprocket (24); The swing arm device (2.4) is composed of a swing arm (14) and a counterweight (15), wherein the swing arm (14) and the counterweight (15) are fixed on the swing arm shaft, and the swing arm (14) is an integrated swing arm; The chain tensioning device (2.5) is composed of a second shaft end baffle (12), a tensioning wheel shaft (13), a second shaft sleeve (17), and a tensioning sprocket (18); the second shaft end baffle (12) fixes the second shaft sleeve (17) and the tensioning sprocket (18) to the tensioning wheel shaft (13) by means of bolts, and the second shaft sleeve (17) cooperates with the tensioning sprocket (18) to realize the rotation of the tensioning sprocket (18).

2. A swivel arm device according to claim 1, characterized in that: The bearing seat assembly device (2.2) is an integrated assembly and can be assembled and disassembled as a whole.

3. A swivel arm device according to claim 1, characterized in that: The chain adjustment device (2.5) is fixed by two stainless steel M24 adjustment bolts.

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