JPH074934U - Universal joint - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To provide a universal joint that can investigate the degree of deterioration and excess or deficiency of the lubricant simply by stopping without removing the universal joint. A bearing 2 composed of a roller 21 and a bearing cup 22 is provided at the tip of each cross-shaped shaft 1, and a cross-shaped lubricant passage 1 is formed from the inside of the cross-shaped shaft in each bearing direction.
In the universal joint provided with 1, a universal joint in which a gauge 4 having an elongated rod portion is attached to the bearing cup 22 of each shaft tip bearing 2 of the cross-shaped shaft 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is a universal joint that can easily check the deterioration of the grease present in the end of the cross shaft or the excess or deficiency of the grease itself, especially the universal joint of the drive shaft such as the propeller shaft of the vehicle. Regarding

[0002]

[Prior art]

 The drive shaft used for the propeller shaft and the like is connected with a universal joint on the way. Inside the universal joint's cross-shaped shaft (spider), a cross-shaped lubricant filling passage is provided up to the tip of each shaft, and the bearings attached to the tip of each shaft are lubricated (grease). ) To lubricate. The bearing is usually composed of a roller and a bearing cup and is fitted into the yokes of the drive shaft and the driven shaft. However, the temperature of the bearing becomes relatively high during rotational driving, and the viscosity of the grease changes or leakage occurs. It is easy to leak or harden in the middle of the passage. Therefore, since the viscosity of the universal joint lubricant (grease) changes with temperature, it is necessary to pay sufficient attention to the degree of deterioration and filling amount. The conventional universal joint has a universal joint (special feature) in which a stirrer (ball) is arranged in the lubrication passage at the tip of the cross-shaped shaft to stir the grease inside the passage inside the cross-shaped shaft. No. 56-97628), or a protrusion that inserts a sealant between the shaft at the tip of the cross shaft and the bearing outer ring (bearing cup) and prevents the grease from leaking. A universal joint (No. Shokai 53-149158) in which a shaft is fixed to the shaft side or the bearing outer ring side is known.

[0003]

[Problems to be solved by the device]

 In order to know the degree of deterioration or lack of lubricant enclosed in the cruciform shaft of the universal joint, it is necessary to remove the universal joint from the built-in machine and disassemble it. Absent. Therefore, it is very inefficient to stop the operation and disassemble it just to judge the addition or replacement status of the lubricant (grease).

The present invention has been made in view of the above problems, and its purpose is to stop the deterioration of the lubricant (grease) and the excess or deficiency of the lubricant simply by stopping the universal joint without removing it. It is to provide a universal joint that can be investigated.

[0005]

[Means for Solving the Problems]

 That is, in order to solve the above-mentioned problems, the present invention provides a bearing consisting of a roller and a bearing cup at the tip of each cross-shaped shaft and forms a cross-shaped shape from inside the cross-shaped shaft in each bearing direction. A universal joint provided with a lubricant passage is characterized in that a gauge having an elongated rod-like portion is attached to a bearing cup of each shaft end bearing of the cross-shaped shaft.

[0006]

[Action]

 When the universal joint of the present invention is used as the above means, the gauge is removed from the bearing cup simply by stopping the machine when necessary, and the lubricant attached to the elongated bar portion of the gauge is investigated and lubricated. It is possible to judge the degree of deterioration of the agent. In addition, it is possible to determine the excess / deficiency of the lubricant by examining the extent to which the lubricant adheres to the elongated bar portion of the gauge. Therefore, it becomes easy to judge the addition or replacement of lubricant, which is extremely effective in managing lubrication.

[0007]

【Example】

 Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 (A) is a partially sectional front view of the universal saljoite of the present invention. A lubricant passage 11 having a cross shape is provided inside the cross-shaped shaft 1 of the universal joint so as to extend to the shaft end 1a. A female screw 1b for attaching a grease snipple is provided on a side surface of the cross-shaped shaft 1, and a passage 12 communicating from the female screw 1b to the cross-shaped passage 11 is provided.

Next, a bearing 2 composed of a roller 21 and a bearing cup 22 is mounted on the shaft tip portion 1a of the cross-shaped shaft 1, and a seal is provided between the bearing cup 22 and the shaft tip portion 1a. Le 3 is fitted. A female screw portion 22a is provided at the center of the bearing cup 22, and a gauge 4 is screwed into and attached to the female screw portion 22a. As shown in FIG. 1B, the gauge 4 is composed of a male screw portion 4a screwed to the female screw portion 22a of the bearing cup 22 and an elongated rod-shaped portion 4b (note that the end portion of the male screw portion 4a is (Head 4c is a hexagon that can be easily rotated with a wrench, etc.), and the surface of the elongated rod-shaped portion 4b of the gauge 4 is knurled to make it easy for grease to adhere. A fine line-shaped stamp is provided.

As described above, one gauge 4 is attached to the bearing cup 22 of the shaft tip portion 1a of the cross shaft 1, but it may be attached to all the bearing cups 22 of the shaft written by the cross shaft, but only one. When installing, attach plugs (blind plugs) 5 to the other three places to prevent lubricant leakage. The length of the elongated rod-shaped portion 4b of the gauge 4 may be set to an appropriate length according to the purpose of use, and may be a length close to the center of the cross-shaped shaft 1 or half of the shaft end 1a or it The following lengths may be used.

When the universal joint of the present invention has the above-mentioned structure, the gauge 4 is removed from the bearing cup 22 by simply stopping the machine when necessary, and attached to the elongated rod-shaped portion 4b of the gauge 4. The degree of deterioration of the lubricant can be determined by examining the lubricant (grease). Further, by checking up to which part of the elongated bar portion 4b of the gauge 4 the lubricant has adhered, it is possible to judge whether the lubricant is excessive or insufficient. Therefore, it becomes easy to judge the addition or replacement of lubricant, which is extremely effective in controlling lubrication.

[0011]

[Effect of device]

 Since the universal joint of the present invention has the structure described in detail above, the lubricant (grease) enclosed in the universal joint with the propeller shaft equipped with the universal joint mounted on the machine is used. -) It is possible to check and confirm the degree of deterioration. Therefore, the lubricant can be added or replaced at an appropriate timing, so that the service life can be extended and troubles due to insufficient lubrication can be avoided.

[Brief description of drawings]

FIG. 1 (A) is a partial cross-sectional front view of a universal saljoite of the present invention, and FIG. 1 (B) is an embodiment of a gauge.

[Explanation of symbols]

1 Cross-Shaped Shaft 1a Shaft Tip 11, 12 Lubricant Passage 2 Bearing 21 Roller 22
Bearing cup 3 Seal 4 Gauge 4a Male screw 4b
Slender bar 5 plug

Claims (1)

[Scope of utility model registration request] 1. A universal system in which a bearing comprising a roller and a bearing cup is provided at the tip of each cross-shaped shaft, and a cross-shaped lubricant passage is provided in the direction of each bearing from inside the cross-shaped shaft. In the joint, a universal joint is characterized in that a gauge having an elongated rod-like portion is attached to a bearing cup of each shaft end bearing of the cross-shaped shaft.