A grease sampling device for turntable bearing

Abstract

The present invention belongs to the technical field of mechanical lubrication, and proposes a grease sampling device for a turntable bearing. The proposed grease sampling device for a turntable bearing is installed at the grease injection hole of the turntable bearing; the grease sampling device has an external hexagonal thread seat; the external hexagonal thread seat is a cylinder with an annular boss at the center of the outer circumferential surface; the annular boss divides the external hexagonal thread seat into two parts; one part of the external hexagonal thread seat has an external thread on the outer wall surface that matches the internal thread of the grease injection hole of the turntable bearing; a round tube for inserting into the turntable bearing is connected to a part of the external hexagonal thread seat with the external thread; the end face of the round tube inserted into the external hexagonal thread seat has a tapered hole that matches the tapered top end of the sealing tapered rod; the other end of the round tube has a through hole; a piston is arranged in the round tube; the piston is elastically supported in the round tube by a spring. The present invention can timely judge the use status of the turntable bearing grease, and has the characteristics of simple structure and convenient use.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical lubrication, and mainly relates to a grease sampling device for a turntable bearing. Background Art

[0002] Currently, slewing bearings are mostly lubricated with grease. After a period of use, it is necessary to understand the internal grease contamination and loss to decide whether to add grease. Since the grease is enclosed in a space by the inner and outer rings and the upper and lower rubber seals, it is usually impossible to observe and can only be added regularly. If the grease addition cycle is unreasonable, the turntable bearing may be damaged early due to lack of grease, or grease may be wasted due to excessive grease addition. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a grease sampling device.

[0004] The present invention adopts the following technical solutions to complete its invention task:

[0005] A grease sampling device for a turntable bearing, the grease sampling device is installed at the grease injection hole of the turntable bearing; the grease sampling device has an external hexagonal threaded seat; the external hexagonal threaded seat is a cylinder with an annular boss at the center of the outer circumferential surface; the annular boss divides the external hexagonal threaded seat into two parts; one part of the external hexagonal threaded seat has an external thread on the outer wall surface that matches the internal thread of the grease injection hole of the turntable bearing; a round tube for inserting into the turntable bearing is connected to a part of the external hexagonal threaded seat with the external thread; the end face of one end of the round tube inserted into the external hexagonal threaded seat has a tapered hole that matches the tapered top end of the sealing tapered rod; the other end of the round tube has a through hole for collecting the grease in the turntable bearing; a piston is arranged in the round tube; the piston is elastically supported in the round tube by a spring; one end of the spring One end is elastically connected to the piston, and the other end is fixed to the bottom surface of the other end of the circular tube; a pull rod is provided corresponding to the piston to pull it to move horizontally in the circular tube; the pull rod passes through the through hole at the other end of the circular tube and is located on the outside of the circular tube; the sealing cone rod is threadedly connected to the center of the other part of the external hexagonal threaded seat, and the cone top end of the sealing cone rod matches the cone hole on the circular tube; a closed space for air gathering is formed between the sealing cone rod, the piston and the circular tube; when the grease sampling device is in use, the piston is pushed to suck the grease in the turntable bearing under the action of the spring force, and the size of the exhaust gap is adjusted to adjust the speed at which the spring pushes the piston, so that the internal grease has time to gather at the grease sampling device and enter the grease sampling device during the rotation of the turntable bearing, thereby completing the grease sampling.

[0006] A grease sampling device proposed in the present invention adopts the above-mentioned technical scheme and is installed at the grease injection hole of the turntable bearing. Under the action of the spring force, the air in the circular tube forms a suction force, and the grease in the turntable bearing is adsorbed in the circular tube, so that the usage status of the turntable bearing grease can be judged in time. The device has the characteristics of simple structure and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 Schematic diagram of the structure of the grease sampling device.

[0008] In the figure: 1, external hexagonal thread seat, 1-1, annular boss, 1-2, external thread 2, sealing cone rod, 4, piston, 5, O-ring, 6, spring, 7, pull rod. DETAILED DESCRIPTION

[0009] The present invention is described with reference to the accompanying drawings and embodiments:

[0010] like Figure 1As shown, a grease sampling device for a turntable bearing, the grease sampling device is installed at the grease injection hole of the turntable bearing; the grease sampling device has an external hexagonal thread seat 1; the external hexagonal thread seat 1 is a cylinder with an annular boss 1-1 at the center of the outer circumference; the annular boss divides the external hexagonal thread seat into two parts; one part of the external hexagonal thread seat has an external thread 1-2 on the outer wall surface that matches the internal thread of the turntable bearing grease injection hole; the part of the external hexagonal thread seat with the external thread 1-1 is connected with a round tube for inserting into the turntable bearing; the The end face of the round tube inserted into the external hexagonal threaded seat 1 has a tapered hole that matches the tapered top of the sealing cone rod; the other end of the round tube has a through hole 3-1 for collecting grease in the turntable bearing; a piston 4 is arranged in the round tube; the piston 4 is elastically supported in the round tube by a spring 6; one end of the spring 6 is elastically connected to the piston 4, and the other end is fixed to the bottom surface of the other end of the round tube; a pull rod 7 is provided corresponding to the piston 4 for pulling it to move horizontally in the round tube; the pull rod 7 passes through the through hole at the other end of the round tube and is located on the outside of the round tube; the sealing cone rod 2 thread The thread is connected to the center of the other part of the external hexagonal thread seat 1, and the 2 cone tops of the sealing cone rod match the tapered hole on the round tube; a closed space for air gathering is formed between the sealing cone rod 2, the piston 4 and the round tube; when the grease sampling device is in use, the grease sampling device is inserted from the grease injection hole of the turntable bearing, and the external hexagonal thread seat 1 is tightened (the thread of the external hexagonal thread seat and the thread of the oil cup at the original grease injection hole have the same specifications), the sealing cone rod 2 is first loosened to allow air to flow in, and the pull rod 7 connected to the piston 4 through the thread is pulled to compress the spring 6 to move the piston 4 To one end, tighten the sealing cone rod 2, and unscrew the pull rod 7. Due to the closed space formed by 1, the sealing cone rod 2, the round tube, the piston 4, and the O-ring seal 5, the spring 6 remains in a compressed state, and the piston stays at the end of the round tube; then slightly loosen the sealing cone rod 2 to allow the air to be discharged slowly; at this time, operate the turntable bearing, and under the impetus of the flow force of the internal grease when the spring 6 and the turntable bearing rotate, the air inside the grease sampling device is slowly discharged from the gap between the sealing cone rod and the external hexagonal threaded seat, and the grease in the turntable bearing gathers at the grease sampling device and enters the inside of the round tube, so the grease inside the turntable bearing can be taken out.

Claims

1. A grease sampling device for a turntable bearing, characterized in that: The grease sampling device is installed at the grease injection hole of the turntable bearing; the grease sampling device has an external hexagonal threaded seat; the external hexagonal threaded seat is a cylinder with an annular boss at the center of the outer circumferential surface; the annular boss divides the external hexagonal threaded seat into two parts; one of the external hexagonal threaded seats has an external thread on the outer wall surface that matches the internal thread of the turntable bearing grease injection hole; a round tube for inserting into the turntable bearing is connected to a part of the external hexagonal threaded seat with the external thread; the end surface of one end of the round tube inserted into the external hexagonal threaded seat has a tapered hole that matches the tapered top end of the sealing tapered rod; the other end of the round tube has a through hole for collecting the grease in the turntable bearing; a piston is arranged in the round tube; the piston is elastically supported in the round tube by a spring; one end of the spring is elastically connected to the piston The piston is connected with the cylindrical body through a threaded connection, and the other end is fixed on the bottom surface of the other end of the cylindrical tube; a pull rod is provided corresponding to the piston to pull it to move horizontally in the cylindrical tube; the pull rod passes through the through hole at the other end of the cylindrical tube and is located on the outside of the cylindrical tube; the sealing cone rod is threadedly connected to the center of the other part of the external hexagonal threaded seat, and the cone top of the sealing cone rod matches the cone hole on the cylindrical tube; a closed space for air gathering is formed between the sealing cone rod, the piston and the cylindrical tube; when the grease sampling device is in use, the piston is pushed to suck the grease in the turntable bearing under the action of the spring force, and the size of the exhaust gap is adjusted to adjust the speed at which the spring pushes the piston, so that the internal grease has time to gather at the grease sampling device and enter the grease sampling device during the rotation of the turntable bearing, thereby completing the grease sampling.

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