Slewing support bearing for special equipment

Abstract

The utility model discloses a slewing bearing for special equipment, which comprises an inner ring, an outer ring, a steel ball and a retainer, the outer ring is coaxially sleeved on the outer side wall of the inner ring, the retainer is positioned between the outer side wall of the inner ring and the inner side wall of the outer ring, the steel ball is arranged in the retainer, a plurality of lightening holes are arranged on the end face of the retainer, and the inner side wall of the inner ring is provided with a plurality of bearing holes. And the plurality of lightening holes are uniformly and circumferentially distributed on the retainer. According to the slewing bearing for the special equipment disclosed by the utility model, the friction torque can be effectively reduced through the arrangement of the lightening holes.

Description

Technical Field

[0001] The utility model relates to a bearing, more specifically to a slewing bearing for special equipment. Background Art

[0002] At present, the performance requirements of bearings used in special equipment are different from those of ordinary equipment. For example, the utility model patent No. 202220630352.5 applied for by the applicant in 2022, entitled Slewing Bearing for Special Equipment, discloses the effect of fixing the cable through a positioning component with a fan-shaped groove. However, the bearings used in the guide heads of some special equipment need to operate at low speeds and light loads and require flexible rotation, and the above-mentioned slewing bearings are obviously unable to meet the requirements of the guide heads of the special equipment. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a slewing bearing for special equipment that can be effectively applied to the working conditions required by the guide head of the special equipment.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a slewing bearing for special equipment, comprising an inner ring, an outer ring, a steel ball and a retaining frame, wherein the outer ring is coaxially sleeved on the outer side wall of the inner ring, the retaining frame is located between the outer side wall of the inner ring and the inner side wall of the outer ring, the steel ball is arranged in the retaining frame, and a plurality of weight-reducing holes are opened on the end face of the retaining frame, and the plurality of weight-reducing holes are evenly distributed on the retaining frame in a circular shape.

[0005] As a further improvement of the utility model, the retaining frame is provided with a plurality of pockets, the steel balls are placed in the plurality of pockets one by one, the cross section of the pockets is barrel-shaped, and the two ends of the barrel are contracted.

[0006] As a further improvement of the utility model, the retaining frame is formed by butting two ends of two half-ring frame bodies together.

[0007] As a further improvement of the utility model, a plurality of bolt holes are provided on the end face of the frame body, and mounting ring plates are respectively fixed on both ends of the inner ring, and a plurality of mounting screws and mounting nuts are fixed on the end face of the mounting ring plate. The end of the mounting screw penetrates the mounting ring plate and then passes through the bolt hole to penetrate the two end faces of the frame body, and the mounting nut is threadedly fixed on the screw to fix the frame body on the mounting ring plate, so that the two ends of the frame body of the two half rings are butt-jointed and combined to form a retaining frame.

[0008] As a further improvement of the present invention, the frame is made of PTFE+MoS+glass fiber material.

[0009] The beneficial effects of the utility model are as follows: through the arrangement of the inner ring, the outer ring, the retaining frame and the steel ball, a slewing bearing structure can be effectively formed, which can be applied to external special equipment; and by adopting the method of opening a weight-reducing hole on the retaining frame, the friction torque can be reduced; and the ball-less structure, the ball filling angle of 8 degrees, does not need to design a ball filling gap, and the operating friction torque is reduced; the integral retaining frame has an extra-large pocket hole, which reduces the contact area between the ball and the pocket hole, and reduces the operating friction torque; the integral screw connection structure is easy to install and disassemble, and there is no damage; the retaining frame material is PTFE+MoS+glass fiber, which has a self-lubricating function, does not need to add grease, and reduces the operating friction torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the overall structure diagram of the slewing bearing for special equipment of the utility model;

[0011] Figure 2 It is a cross-sectional schematic diagram of a slewing bearing for special equipment of the utility model;

[0012] Figure 3 for Figure 1 The overall structure diagram of the middle frame. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the embodiments given in the accompanying drawings.

[0014] Reference Figures 1 to 3 As shown, a slewing bearing for special equipment of this embodiment comprises an inner ring 1, an outer ring 2, a steel ball 3 and a retainer 4, wherein the outer ring 2 is coaxially sleeved on the outer side wall of the inner ring 1, the retainer 4 is located between the outer side wall of the inner ring 1 and the inner side wall of the outer ring 2, and the steel ball 3 is arranged in the retainer 4, characterized in that: a plurality of weight-reducing holes 5 are opened on the end surface of the retainer 4, and the plurality of weight-reducing holes 5 are evenly distributed on the retainer 4. In the process of using the slewing bearing of this embodiment, it is only necessary to install the inner ring 1 and the outer ring 2 to the special equipment. The guide head can be placed on the guide head, and during the operation of the bearing, the cooperation of the steel ball 3 and the retaining frame 4 can be utilized to realize the relative rotation of the inner ring 1 and the outer ring 2. In addition, the setting of the weight-reducing hole 5 of the retaining frame 4 in this embodiment can effectively reduce the friction torque, and is well suitable for the low-speed and light-load working conditions of the guide head. The outer wall of the inner ring 1 and the inner wall of the outer ring 2 in this embodiment are formed with a groove for the steel ball 3 to roll, and the bottom of the groove is provided with a groove with an arc-shaped cross-section. Through the action of this groove, the contact area between the steel ball 3 and the groove can be further reduced.

[0015] As an improved specific implementation method, a plurality of pockets 6 are provided on the retaining frame 4, and the steel balls 3 are placed in the plurality of pockets 6 in a one-to-one correspondence. The cross-section of the pockets 6 is barrel-shaped, and the two ends of the barrel are contracted. Through the setting of the above structure, a ball-less structure can be achieved, and the ball filling angle is 182.5 degrees. There is no need to design a ball filling gap, thereby reducing the operating friction torque; the overall retaining frame has extra-large pockets, which reduces the contact area between the balls and the pockets, thereby reducing the operating friction torque.

[0016] As an improved specific implementation, the retaining frame 4 is formed by butting two ends of two half-ring frame bodies 41 together.

[0017] As an improved specific implementation, a plurality of bolt holes are opened on the end face of the frame body 41, and mounting ring plates are respectively fixed at both ends of the inner ring 1, and a plurality of mounting screws and mounting nuts are fixed on the end face of the mounting ring plate. The end of the mounting screw penetrates the mounting ring plate and then passes through the bolt hole to penetrate the two end faces of the frame body 41, and the mounting nut is threadedly fixed on the screw to fix the frame body 41 on the mounting ring plate, so that the two ends of the frame body 41 of the two half rings are butt-jointed and combined to form a retaining frame 4. Through the setting of the above-mentioned structure, the overall screw connection structure is convenient for installation and disassembly without damage.

[0018] As an improved specific implementation, the frame 41 is made of PTFE+MoS2+glass fiber material, has a self-lubricating function, does not need to add grease, and reduces the operating friction torque.

[0019] In summary, the slewing bearing for special equipment of this embodiment can effectively reduce the friction torque by opening the weight-reducing hole 5 on the retaining frame 4, so that the bearing can be well applied to the low-speed and light-load working conditions such as the guide head of special equipment.

[0020] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A slewing bearing for special equipment, comprising an inner ring (1), an outer ring (2), a steel ball (3) and a retaining frame (4), wherein the outer ring (2) is coaxially sleeved on the outer side wall of the inner ring (1), the retaining frame (4) is located between the outer side wall of the inner ring (1) and the inner side wall of the outer ring (2), and the steel ball (3) is arranged in the retaining frame (4), characterized in that: A plurality of weight-reducing holes (5) are provided on the end surface of the retaining frame (4), and the plurality of weight-reducing holes (5) are evenly distributed on the retaining frame (4) in a circular pattern.

2. The slewing bearing for special equipment according to claim 1, characterized in that: The retaining frame (4) is provided with a plurality of pockets (6), and the steel balls (3) are placed in the plurality of pockets (6) in a one-to-one correspondence. The pockets (6) have a barrel-shaped cross section, and the two ends of the barrel are arranged in a contracted manner.

3. The slewing bearing for special equipment according to claim 2, characterized in that: The retaining frame (4) is formed by butting two ends of two half-ring frame bodies (41) together.

4. The slewing bearing for special equipment according to claim 3, characterized in that: A plurality of bolt holes are provided on the end surface of the frame body (41), and mounting ring plates are respectively fixed at both ends of the inner ring (1). A plurality of mounting screws and mounting nuts are fixed on the end surface of the mounting ring plate. The ends of the mounting screws penetrate the mounting ring plate and then pass through the bolt holes to penetrate the two end surfaces of the frame body (41). The mounting nuts are threadedly fixed on the screws to fix the frame body (41) on the mounting ring plate, so that the two ends of the frame body (41) of the two half rings are butt-jointed to form a retaining frame (4).

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