Centralizer for machining circular shaft piece

Abstract

The utility model discloses a machining round shaft centering device which comprises a rod body, an inserting groove is formed in one end of the rod body, the inserting groove is connected with a connecting piece through a bolt assembly, and limiting assemblies used for making contact with the circumferential face of a round shaft are arranged at the ends, located outside the inserting groove, of two arm rods of the connecting piece. Compared with the prior art, the two limiting assemblies can make contact with the circumferential face of the circular shaft piece blank, so that in the rotating process of the circular shaft piece blank, the two limiting assemblies can improve the rotating stability of the circular shaft piece and avoid large shaking of the circular shaft piece, and therefore when the upper tailstock of the lathe is used for punching the circular shaft piece, the circular shaft piece is not prone to being damaged. The punching precision can be improved, and then the machining precision of the circular shaft piece blank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a centralizer for machining a circular shaft. Background Art

[0002] Circular shafts are common parts in machinery, usually made of metal round rods, used to connect different parts in the machine to achieve motion and force transmission. The blanks processed by circular shafts are generally cylindrical. When the blank is long and has a large diameter, the three-jaw chuck can only clamp a very small part of the blank, resulting in the blank away from the three-jaw chuck position. There will be obvious shaking when rotating, which will lead to large errors in the blank processing.

[0003] To solve this problem, the tailstock on the lathe is usually used to punch a hole at the end of the round shaft blank, and then a thimble is used to support the round hole to reduce the shaking of the blank. However, when punching, the blank needs to be rotated, and the end of its rotation will shake, which will cause the punching position at the end to be inaccurate. As a result, even if the thimble is supporting the round hole, the blank will still have a large processing error. Utility Model Content

[0004] The main purpose of the utility model is to provide a machined round shaft centralizer.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A machined circular shaft centralizer includes a rod body, one end of which is provided with a slot, the slot is connected to a connecting piece via a bolt assembly, and the two arm ends of the connecting piece located outside the slot are provided with a limit assembly for contacting the circumferential surface of the circular shaft.

[0007] Furthermore, the limiting assembly includes a positioning shaft and a bearing, the positioning shaft is fixed to the end of the arm, the inner ring of the bearing is fixedly connected to the positioning shaft, and the diameter of the bearing is greater than the width of the arm.

[0008] Furthermore, the bolt assembly includes a screw rod passing through a slot, and the screw rod outside the slot is threadedly connected to a nut.

[0009] Furthermore, a through hole is provided on the connecting member located in the slot, the screw rod passes through the through hole and the connecting member rotates around the screw rod as an axis.

[0010] Furthermore, the connecting piece is a V-shaped piece, and the intersection of the two arm rods is located in a slot.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The two limiting components of the present invention can contact the circumferential surface of the circular shaft blank. Therefore, during the rotation of the circular shaft blank, the two limiting components can improve the stability of the rotation of the circular shaft and avoid large shaking. Therefore, when the circular shaft is punched using the tailstock on a lathe, the punching accuracy can be improved, thereby improving the processing accuracy of the circular shaft blank.

[0013] The outer ring of the bearing of the utility model can rotate. When the outer ring of the bearing contacts the circumferential surface of the round shaft blank and the round shaft blank rotates, no large friction occurs with the round shaft blank, thereby reducing noise.

[0014] The connecting piece of the utility model can rotate with the screw as the axis, so that the contact position between the outer rings of the bearings of the two limiting assemblies and the circumferential surface of the round shaft blank can be adjusted, thereby facilitating personnel operation. It can also improve the limiting effect of the limiting assembly on the round shaft blank by changing the contact position, thereby further improving the rotational stability of the round shaft blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a front view schematic diagram of a machined round shaft centralizer.

[0016] Figure 2 The utility model is a side view schematic diagram of a machined round shaft centralizer.

[0017] Figure 3 The utility model is a schematic diagram of the connection structure of the connector and the limit assembly of a machined round shaft centralizer.

[0018] Figure 4 The utility model is a schematic diagram of the use of a machined round shaft centralizer.

[0019] In the figure: 1. Rod body; 101. Slot; 2. Connector; 201. Through hole; 202. Arm; 3. Limit assembly; 301. Positioning shaft; 302. Bearing; 4. Bolt assembly; 401. Screw; 402. Nut. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figure 1-4 As shown, a machined round shaft straightener includes a rod body 1, a slot 101 is opened at one end of the rod body 1, the slot 101 is connected to a connecting member 2 through a bolt assembly 4, and the ends of the two arms 202 of the connecting member 2 located outside the slot 101 are provided with a limiting assembly 3 for contacting the circumferential surface of the round shaft blank.

[0022] In this embodiment, if Figure 1 and Figure 3 As shown, the limiting assembly 3 includes a positioning shaft 301 and a bearing 302. The positioning shaft 301 is fixed to the end of the arm 202. The inner ring of the bearing 302 is fixedly connected to the positioning shaft 301. The diameter of the bearing 302 is greater than the width of the arm 202. Therefore, the outer ring of the bearing 302 can rotate relative to the connecting member 2, and the outer ring of the bearing 302 is located on the outside of the arm 202.

[0023] When punching a large diameter round shaft blank, the rod body 1 can be fixed on the tool holder of the lathe first, and the tool holder can be moved so that the outer rings of the bearings 302 of the two limit assemblies 3 are in contact with the circumferential surface of the round shaft blank clamped by the three-jaw chuck. Figure 4 As shown, the main shaft of the lathe rotates, driving the round shaft blank to rotate. At this time, since the part of the round shaft blank away from the end of the three-jaw chuck is in contact with the two limit assemblies 3, the stability of the rotation of the round shaft blank can be improved, and the end thereof (away from the end of the three-jaw chuck) can be avoided from shaking greatly, so that when the tailstock on the lathe is used to punch the round shaft blank, the punching accuracy can be improved, and the outer ring of the bearing 302 can rotate. When the outer ring of the bearing 302 contacts the circumferential surface of the round shaft blank and the round shaft blank rotates, no large friction will occur with the round shaft blank, thereby reducing noise.

[0024] Among them, Figure 2 As shown, the bolt assembly 4 includes a screw rod 401 passing through the slot 101, and the screw rod 401 outside the slot 101 is threadedly connected to a nut 402, as shown in FIG. Figure 3 As shown, a through hole 201 is provided on the connector 2 located in the slot 101, a screw 401 passes through the through hole 201 and the connector 2 rotates around the screw 401. Since the connector 2 can rotate around the screw 401, the contact position between the outer rings of the bearings 302 of the two limiting assemblies 3 and the circumferential surface of the circular shaft blank can be adjusted by rotating the connector 2, thereby facilitating operation for personnel and improving the limiting effect of the limiting assembly 3 on the circular shaft blank by changing the contact position, thereby further improving the rotational stability of the circular shaft blank.

[0025] When the angle of the connector 2 is determined, the operator can rotate the nut 402 to deform the rod body 1 at the slot 101 position, thereby allowing the rod body 1 to clamp and fix the connector 2 in the slot 101, avoiding changes in the position of the limit assembly 3 during use.

[0026] like Figure 3 and Figure 2 As shown, the connecting member 2 is a V-shaped member, and the intersection of the two arm rods 202 is located in the slot 101.

[0027] Working principle: first, fix the round shaft blank on the three-jaw chuck on the lathe, and then fix the rod body 1 on the tool holder of the lathe, and use the movement of the tool holder itself to make the outer rings of the bearings 302 of the two limiting components 3 contact the circumferential surface of the round shaft blank. In this process, the connecting part 2 can be rotated with the screw 401 as the axis, and then adjust the position where the outer rings of the bearings 302 of the two limiting components 3 contact the circumferential surface of the round shaft blank. When the position is determined, the personnel use the handle to tighten the nut 402, so that the rod body 1 at the position of the slot 101 is deformed, and then the rod body 1 clamps the connecting part 2 and fixes it in the slot 101, avoiding changes in the angle of the limiting component 3. When the outer ring of the bearing 302 of the limiting component 3 contacts the circumferential surface of the circular shaft blank, the lathe spindle should be controlled to rotate, thereby driving the circular shaft blank to rotate. At this time, since the part of the circular shaft blank away from the end of the three-jaw chuck contacts the two limiting components 3, the stability of the rotation of the circular shaft blank can be improved, and its end (away from the end of the three-jaw chuck) can be avoided from shaking greatly, so that when the tailstock on the lathe is used to punch the circular shaft blank, the punching accuracy can be improved, and the outer ring of the bearing 302 can rotate. When the outer ring of the bearing 302 contacts the circumferential surface of the circular shaft blank, and when the circular shaft blank rotates, no large friction will occur with the circular shaft blank, thereby reducing noise.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A centralizer for machining a circular shaft, comprising a rod body (1), characterized in that: A slot (101) is provided at one end of the rod body (1), and the slot (101) is connected to a connecting member (2) via a bolt assembly (4). The ends of two arm rods (202) of the connecting member (2) outside the slot (101) are provided with a limiting assembly (3) for contacting the circumferential surface of the circular shaft member.

2. A machined circular shaft centralizer according to claim 1, characterized in that: The limiting assembly (3) comprises a positioning shaft (301) and a bearing (302), wherein the positioning shaft (301) is fixed to the end of the arm (202), the inner ring of the bearing (302) is fixedly connected to the positioning shaft (301), and the diameter of the bearing (302) is greater than the width of the arm (202).

3. A machined circular shaft centralizer according to claim 1 or 2, characterized in that: The bolt assembly (4) comprises a screw rod (401) passing through a slot (101), and a nut (402) is threadedly connected to the screw rod (401) outside the slot (101).

4. A machined circular shaft centralizer according to claim 3, characterized in that: A through hole (201) is provided on the connecting member (2) located in the slot (101), the screw rod (401) passes through the through hole (201), and the connecting member (2) rotates around the screw rod (401) as an axis.

5. The centralizer for machining a circular shaft according to claim 1, characterized in that: The connecting member (2) is a V-shaped member, and the junction of the two arm rods (202) is located in the slot (101).

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