JPH065870U - Hydraulic extractor such as bearing - Google Patents

Abstract

(57) [Summary] [Purpose] A hydraulic system such as a bearing that is suitable for pulling the bearing out of the shaft when replacing the bearing used for the wheels for trucks that move in and out of the furnace at high temperature in the ceramic industry. It is intended to provide a remover. It should be noted that the present invention can be applied to gears and pulleys that are difficult to pull out. [Structure] A cylindrical portion 3A connected to the hydraulic cylinder 2 and a bearing holding portion 3B integrally formed at the tip of the connecting cylindrical portion 3A are formed, and the bearing holding portion 3B is
The bearing 4 and the gears, pulleys, etc., which are hard to come off due to seizure on the shaft 4A, are configured to wrap from the outside, and the cylinder rod 2B of the hydraulic cylinder 2 moves forward and backward with respect to the front end face of the shaft 4A. It is freely configured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hydraulic ejector such as a bearing, and more specifically, for example, when exchanging a bearing used for a wheel for a truck that moves in and out of a furnace in a high temperature state related to a ceramic industry, to remove the bearing from the shaft. It concerns a device suitable for use. The bearing in this state is burned onto the shaft at high temperature, making it extremely difficult to pull it out. Further, the present invention is also suitable for removing a gear or pulley that is difficult to come off from the shaft for some reason.

[0002]

[Prior art]

 The conventional bearing remover is as follows. It consists of a horizontally long base frame on the left and right of the plane, a screw rod that is screwed forward and backward in the center of this base frame, and left and right locking claws that are connected to the left and right ends of the base frame with pins. There is. To use a bearing that is firmly attached to the shaft, lock the left and right locking claws on the back edge of the bearing, and then contact the screw rod with the outer end surface of the shaft. The bearing is pulled out from the shaft by pressing while screwing.

[0003]

[Problems to be solved by the device]

 Conventional bearing extractors often do not come out when the bearing is seized on the shaft. Besides, it takes time and effort to lock the left and right locking claws to the bearing. A large amount of force is required to screw in the screw rod. During operation, the left and right locking claws may come off the bearing or break, which is dangerous.

The present application has been made in view of such problems of the conventional technology, and an object of the present application is to provide a device capable of solving the above problems.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is as follows. That is, the one of the present application is composed of the hydraulic cylinder 2 and the extraction metal fitting body 3 connected to the tip 4A of the hydraulic cylinder 2, and the extraction metal fitting body 3 is connected to the hydraulic cylinder 2 and the cylindrical portion 3A. , A bearing holding portion 3B integrally formed at the tip of the connecting tubular portion 3A, and the bearing holding portion 3B is hard to come off from the shaft due to seizure or the like on the shaft 4A. 4, the cylinder, the pulley, and the like are externally wrapped, and the cylinder rod 2B of the hydraulic cylinder 2 is configured to move forward and backward with respect to the front end surface of the shaft 4A. It is a vessel.

[0006]

【Example】

 Examples will be described with reference to the drawings. Reference numeral 1 denotes a hydraulic extractor such as a bearing according to the present invention, which is composed of a extracting metal body 3 screwed to a tip 2A of a hydraulic cylinder 2. Reference numeral 4 is a bearing that should be extracted by a hydraulic extractor such as the bearing of the present invention, and is in a state of being seized on the shaft 4A.

Therefore, the metal shell body 3 is composed of a connecting tubular portion 3A for the tip 2A of the hydraulic cylinder 2 and a bearing holder 3B integrally formed at the tip of the connecting tubular portion 3A. The holding portion 3B is an outer disc-shaped body 3B1 corresponding to the front surface of the bearing 4, and a substantially U-shaped portion attached to the outer disc-shaped body so as to correspond to the outer peripheral surface of the bearing 4 from the side. 3B2, and a locking edge portion 3B3 attached to the substantially U-shaped portion on the outer periphery of the rear surface of the bearing 4 so as to be locked from the rear surface direction.

Further, a circular hole 3B11 through which the cylinder rod 2B of the hydraulic cylinder 2 advances and retracts is formed at the center of the outer disk-shaped body 3B1. As a result, the cylinder rod 2B of the hydraulic cylinder 2 moves back and forth with respect to the front end surface of the shaft 4A. In the figure, 2C is a hydraulic pump and 2D is a hydraulic hose.

Although the bearing has been described above as an example, it should be understood that the bearing of the present application is suitable for extracting gears and pulleys that are difficult to pull out for some reason.

The operation will be described. With reference to FIG. 2, the bearing 4 is covered with the bearing holder 3B. Then, when the hydraulic cylinder 2 is actuated by the force of the hydraulic pump 2C, the cylinder rod 2B presses the front end surface of the shaft 4A as shown in FIG. 3, and due to this action, it is enclosed by the bearing enclosing portion 3B. The bearing will be pulled out from the shaft. The same effect can be applied to the work of pulling out the gear and pulley that are difficult to pull out.

[0011]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. 1. Since the bearing holding portion 3B of the present invention supports about 70% or more of the side surface of the bearing, it can be removed without twisting, so that the shaft is not damaged. 2. With conventional bearing removers, it often happens that the bearing does not come off when the bearing is seized on the shaft, but if a hydraulic remover such as the bearing of the present application is used, it will easily come off and will not damage the shaft or bearing. 3. The same effect can be achieved in the work of pulling out the gear and pulley that are difficult to pull out.

[Brief description of drawings]

FIG. 1 is an overall perspective view.

FIG. 2 is a vertical sectional view illustrating a method of use.

FIG. 3 is a vertical sectional view for explaining the operation.

[Explanation of symbols]

 1 Hydraulic extractor such as bearing 2 Hydraulic cylinder 2B Cylinder rod 3 Extractor body 3A Connection cylindrical part 3B Bearing enclosing part 3B1 Outer disk-shaped body 3B2 Almost U-shaped part 3B3 Locking edge part 3B11 Circular hole 4 Bearing

Claims (1)

[Scope of utility model registration request] 1. A hydraulic cylinder (2) and a main body (3) of a metal fitting connected to a tip (4A) of the hydraulic cylinder.
The metal shell body (3) comprises a tubular portion (3A) connected to the hydraulic cylinder (2) and a bearing holding portion (3) integrally formed at the tip of the tubular portion (3A). 3B) and a bearing holding part (3B)
Is configured to externally enclose the bearing (4), gears, pulleys, etc. that are hard to come off from the shaft (4A) due to seizure or the like, and the cylinder rod of the hydraulic cylinder (2). (2B)
Is a hydraulic extractor such as a bearing, which is configured to be movable back and forth with respect to the front end surface of the shaft (4A).