A slewing bearing for a riot water cannon

Abstract

This utility model discloses a slewing bearing for a riot control water cannon vehicle, relating to the field of slewing bearing technology for special vehicles. It includes a T-shaped outer ring for the slewing bearing, with the outer ring facing upwards; the T-shaped outer ring refers to half of its cross-section being T-shaped. An L-shaped inner ring for the slewing bearing is positioned downwards; the L-shaped inner ring refers to half of its cross-section being L-shaped. Rolling elements are radially installed between the inner and outer rings of the slewing bearing. An oil passage is provided within the inner ring and communicates with the rolling elements. A dovetail groove sealing strip is installed between the inner and outer rings. A plug is installed in a mounting hole on the outer ring of the slewing bearing, and the plug is connected to the outside of the rolling elements. A tapered pin is installed within the outer ring of the slewing bearing to solve the aforementioned technical problems of large clearance, large runout, and easy grease leakage due to plugging.

Description

Technical Field

[0001] This utility model relates to the field of slewing bearing technology for special vehicles, specifically a slewing bearing for a riot control water cannon vehicle. Background Technology

[0002] Slewing bearings are crucial force-transmitting components in engineering machinery, capable of withstanding axial forces, radial forces, and overturning moments. They are widely used in industry and are often referred to as the "joints of machines." They are extensively used in truck cranes, port cranes, railway cranes, marine cranes, container cranes, metallurgical cranes, excavators, filling machines, nautical instruments, and in high-precision, cutting-edge fields such as CT scanners, standing wave therapy devices, radar antenna mounts, missile launchers, tanks, robots, and revolving restaurants. The complex stress conditions of slewing bearings place high demands on their performance. However, the technology and production equipment of most domestic slewing bearing manufacturers are currently insufficient to meet these requirements.

[0003] Riot control water cannon trucks are specialized vehicles designed to control large-scale riots and disperse illegal gatherings. They combine a high-pressure water cannon with protective features. The high-pressure water cannon is a rotatable device, designed to be both rotatable and stable, taking into account the stress conditions and the requirements for relative rotation and fixation. Installation locations include... Figure 3 As shown. Figure 2 This is a schematic diagram of an existing ordinary L-type slewing bearing.

[0004] The existing slewing bearing structure has the following problems:

[0005] 1) When the slewing bearing of the anti-riot water cannon vehicle is working, the ordinary L-type slewing bearing has the disadvantages of large gap and large runout, which leads to a significant decline in tightness over time; the structure of the L-type slewing bearing is shown in the single-row four-point contact ball slewing bearing in reference CN201220250488.X.

[0006] 2) Because there is no sealing structure at the blockage location, it is easy to fall off under vibration conditions, which can easily lead to leakage and cause grease to flow out.

[0007] To address these issues, we provide a slewing bearing for riot control water cannon vehicles. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a slewing bearing for riot control water cannon vehicles to solve the aforementioned technical problems of large gaps, large runout, and easy grease leakage when clogged.

[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0010] A slewing bearing for a riot control water cannon vehicle includes:

[0011] The outer ring of the slewing bearing is T-shaped; the outer ring of the slewing bearing is positioned upwards; here, the T-shaped outer ring refers to a cross-section where half of the cross-section is T-shaped.

[0012] The inner ring of the slewing bearing is L-shaped; the inner ring of the slewing bearing is positioned downwards; here, the L-shaped inner ring refers to half of the cross-section having an L-shaped structure.

[0013] Rolling elements are radially installed between the inner ring and the outer ring of the slewing bearing; an oil passage is provided in the inner ring of the slewing bearing and communicates with the rolling elements;

[0014] Dovetail groove type sealing strip, the dovetail groove sealing strip is installed between the inner ring and the outer ring of the slewing bearing;

[0015] A plug is provided with a mounting hole on the outer ring of the slewing bearing, and the plug is installed in the mounting hole; the plug is mounted and connected to the outside of the rolling element; a tapered pin is installed inside the outer ring of the slewing bearing; the tapered pin is adapted to axially penetrate the plug and is fixed inside the outer ring of the slewing bearing.

[0016] In a further technical solution, a constriction groove is provided on the plug body, and a sealing ring is installed on the constriction groove; the outer diameter of the plug body is adapted to the inner diameter of the mounting hole.

[0017] In a further technical solution, an oil hole set screw is installed at the end of the oil circuit.

[0018] In a further technical solution, a first connecting hole is provided on the outer side of the outer ring of the slewing bearing, and a second connecting hole is provided on the outer side of the inner ring of the slewing bearing; a T-slot bolt is detachably installed between the first connecting hole and the second connecting hole, and is installed from the second connecting hole towards the first connecting hole; a nut is also installed on the T-slot bolt, the nut is threaded onto the T-slot bolt, and is installed outside the second connecting hole.

[0019] In a further technical solution, the cross-section of the dovetail groove sealing strip is bent upwards from the bottom, including a lower part, a bent part one, and a bent part two; an installation groove is provided on the side of the outer ring of the slewing bearing facing the inner ring of the slewing bearing, and the lower part is connected to the installation groove.

[0020] A first bend and a second bend are provided on the lower part facing the inner ring of the slewing bearing; the first bend and the second bend are opposite to each other and bend to both sides.

[0021] In a further technical solution, the sealing ring is an O-ring.

[0022] Compared with existing technologies, it has the following beneficial effects:

[0023] This utility model aims to design a novel slewing bearing connecting fixing box and mounting cylinder to meet the flexible steering requirements of water cannons. It can achieve 360° rotation and load transfer, while requiring the overall vehicle structure to be compact, easy to guide rotation, easy to install, and easy to maintain.

[0024] This invention achieves a lower center of gravity and a compact structure by designing the inner ring of the slewing bearing as an L-shape and the outer ring as a T-shape, with the two rings distributed vertically. The slewing bearing also features small clearances and minimal vertical movement, reducing gaps and runout.

[0025] When using riot control water cannons, precise directional control is achieved. When a fixed direction is required, the inner and outer rings of the slewing bearing must be locked to prevent mutual rotation. A T-slot design uses bolts and nuts to lock the inner and outer rings.

[0026] This invention prevents the added grease from leaking out of the blockage by designing a constricting annular groove on the blockage and installing an O-ring seal to achieve an effective sealing effect between the blockage body and the mounting hole. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the slewing bearing of this utility model. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of an existing ordinary L-type slewing bearing;

[0029] Figure 3 This is a schematic diagram showing the location of the slewing bearing of this application installed on the riot control water cannon vehicle;

[0030] Figure 4 This is a cross-sectional view of the slewing bearing of this utility model. Figure 2 ;

[0031] Figure 5 for Figure 4 Enlarged view of part A;

[0032] Figure 6 This is a cross-sectional view of the slewing bearing of this utility model. Figure 3 ;

[0033] Figure 7 This is a structural diagram of the plug of this utility model;

[0034] Figure 8 This is a cross-sectional schematic diagram of the plug of this utility model.

[0035] In the picture:

[0036] 1. Slewing bearing outer ring; 11. Connecting hole one; 12. Mounting slot;

[0037] 2. Slewing bearing inner ring; 21. Connecting hole two;

[0038] 3. Dovetail groove type sealing strip; 31. Lower part; 32. Bend part one; 33. Bend part two;

[0039] 4. Rolling elements;

[0040] 5. Bolts for T-slots;

[0041] 6. Oil hole set screw;

[0042] 7. Blockage body; 71. Closing annular groove;

[0043] 8. O-rings;

[0044] 9. Tapered pin;

[0045] 10. Nuts; Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0047] Figure 2 This is a schematic diagram of an existing ordinary L-type slewing bearing, with the center of gravity relatively high. Figure 3 The installation location of the slewing bearing in the anti-riot water cannon vehicle.

[0048] Example 1

[0049] Please see Figure 1 , 3 As shown in Figures 4 and 5, this utility model provides a technical solution: a slewing bearing for a riot control water cannon vehicle, comprising:

[0050] Slewing bearing outer ring 1, slewing bearing outer ring 1 is T-shaped outer ring; slewing bearing outer ring 1 is upwardly oriented;

[0051] Slewing bearing inner ring 2, slewing bearing inner ring 2 is L-shaped inner ring; slewing bearing inner ring 2 is set downward;

[0052] Rolling elements 4 are radially mounted between the inner ring 2 and the outer ring 1 of the slewing bearing. An oil passage is provided within the inner ring 2 of the slewing bearing and communicates with the rolling elements 4. The rolling elements and nylon spacers are spaced apart on the same circumference; this is a conventional structure. The nylon spacers serve to separate the rolling elements and reduce friction and wear. The nylon spacers are not shown in the figure.

[0053] Dovetail groove type sealing strip 3, the dovetail groove sealing strip is installed between the inner ring 2 and the outer ring 1 of the slewing bearing;

[0054] A plug 7 is provided with a mounting hole on the outer ring 1 of the slewing bearing, and the plug 7 is installed in the mounting hole. The plug 7 is installed and connected to the outside of the rolling element 4. A tapered pin 9 is installed inside the outer ring 1 of the slewing bearing. The tapered pin 9 is adapted to axially penetrate the plug 7 and is fixed inside the outer ring 1 of the slewing bearing.

[0055] A constriction groove 71 is provided on the plug body 7, which is opened before installation. A sealing ring, namely an O-ring 8, is installed on the constriction groove 71. The outer diameter of the plug body 7 is adapted to the inner diameter of the mounting hole. To prevent the added grease from leaking out of the plug, a constriction groove is designed on the plug, and an O-ring is installed. The constriction groove compresses the O-ring to form a radial seal, optimizing the effective seal between the plug body and the mounting hole. An oil hole set screw 6 is installed at the end of the oil passage.

[0056] This invention achieves a lower center of gravity and a compact structure by designing the inner ring of the slewing bearing as an L-shape and the outer ring as a T-shape, with the two rings distributed vertically. The slewing bearing also features small clearances and minimal vertical movement, reducing gaps and runout.

[0057] Example 2

[0058] like Figure 6-8 As shown, another embodiment of this utility model is provided. Based on embodiment 1, a connecting hole 11 is provided on the outer side of the outer ring 1 of the slewing bearing, and a connecting hole 21 is provided on the outer side of the inner ring 2 of the slewing bearing. A T-slot bolt 5 is detachably installed between the connecting hole 11 and the connecting hole 21, and is installed from the connecting hole 21 towards the connecting hole 11. A nut 10 is also installed on the T-slot bolt 5, and the nut 10 is threaded to the T-slot bolt 5 and installed outside the connecting hole 21. When the riot control water cannon truck sprays water, the direction is first adjusted with the inner and outer rings of the slewing bearing loose. If precise direction is required, the T-slot bolt can be tightened into the outer ring of the slewing bearing using an electric or pneumatic screwdriver to tighten the inner and outer rings.

[0059] like Figure 7 As shown, the dovetail groove sealing strip 3 has a cross-section that is bent upwards from the bottom, including a bottom part 31, a first bending part 32, and a second bending part 33; an installation slot 12 is provided on the side of the outer ring 1 of the slewing bearing facing the inner ring 2 of the slewing bearing, and the bottom part 31 is connected in the installation slot 12; the first bending part 32 and the second bending part 33 are provided on the side of the bottom part 31 facing the inner ring 2 of the slewing bearing; the first bending part 32 and the second bending part 33 are opposite to each other and bend to both sides.

[0060] Because the water spray equipment creates a humid environment, a sealing strip is needed to prevent water from entering the slewing bearing raceway. Due to the structural limitations of the slewing bearing, ordinary sealing strips cannot be installed, so a dovetail groove sealing strip was specially designed. The first bend 32 and the second bend 33 at the top of the dovetail groove sealing strip can achieve double sealing protection. The first and second bends form a double-lip seal, preventing external liquid from entering.

[0061] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A slewing bearing for a riot water cannon, characterized in that include: The outer ring (1) of the slewing bearing is T-shaped; the outer ring (1) of the slewing bearing is set upward; The inner ring (2) of the slewing bearing is L-shaped; the inner ring (2) of the slewing bearing is set downward; Rolling element (4): A rolling element (4) is radially installed between the inner ring (2) and the outer ring (1) of the slewing bearing; an oil passage is provided in the inner ring (2) of the slewing bearing and communicates with the rolling element (4); Dovetail groove sealing strip (3) is installed between the inner ring (2) of the slewing bearing and the outer ring (1) of the slewing bearing; A plug (7) is provided with a mounting hole on the outer ring (1) of the slewing bearing, and a plug (7) is installed in the mounting hole; the plug (7) is installed on the outside of the rolling element (4); a tapered pin (9) is installed in the outer ring (1) of the slewing bearing; the tapered pin (9) is adapted to axially penetrate the plug (7) and is fixed in the outer ring (1) of the slewing bearing.

2. The slew bearing for a less-lethal water cannon vehicle according to claim 1, characterized in that A closing annular groove (71) is provided on the plug (7), and a sealing ring is installed on the closing annular groove (71); the outer diameter of the plug (7) is adapted to the inner diameter of the mounting hole.

3. A slewing bearing for a riot control water cannon vehicle according to claim 1, characterized in that, An oil hole set screw (6) is installed at the end of the oil passage.

4. A slewing bearing for a riot control water cannon vehicle according to claim 1, characterized in that, A connecting hole 1 (11) is provided on the outer side of the outer ring (1) of the slewing bearing, and a connecting hole 2 (21) is provided on the outer side of the inner ring (2) of the slewing bearing; a T-slot bolt (5) is detachably installed between the connecting hole 1 (11) and the connecting hole 2 (21), and is installed from the connecting hole 2 (21) toward the connecting hole 1 (11); a nut (10) is also installed on the T-slot bolt (5), the nut (10) is threaded to the T-slot bolt (5), and is installed outside the connecting hole 2 (21).

5. A slewing bearing for a riot control water cannon vehicle according to claim 1, characterized in that, The dovetail groove sealing strip (3) has a cross-section that is bent upwards from the bottom, including a bottom part (31), a first bend (32) and a second bend (33); an installation slot (12) is provided on the side of the outer ring (1) of the slewing bearing facing the inner ring (2) of the slewing bearing, and the bottom part (31) is connected in the installation slot (12); The lower part (31) is provided with a bending part one (32) and a bending part two (33) on the side facing the inner ring (2) of the slewing bearing; the bending part one (32) and the bending part two (33) are opposite to each other and bend to both sides.

6. A slewing bearing for a riot control water cannon vehicle according to claim 2, characterized in that, The sealing ring is an O-ring (8).

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