A new type of engine valve boring and milling machine with electric spindle

Abstract

The application relates to a novel electric spindle for an engine valve boring and milling machine, which comprises a spindle box and a spindle arranged in the spindle box, one side of the spindle box near the end of the spindle is provided with a spindle support sleeve, and the spindle is provided with a rotating part at the position in the spindle box, wherein the rotating part and the spindle are mutually sleeved, a length extension unit is further cooperatively arranged on one side of the spindle support sleeve, the length extension unit comprises a body and mounting seats arranged on the two sides of the body, and the spindle support sleeve and the mounting seat are fixedly connected through threads of screws. The rotating runout of the spindle is limited by the rolling bearing, the spindle support sleeve and the length extension unit, the influence of the large spindle extension stroke on machining precision is avoided, the precision is improved, the length extension unit can be assembled according to needs, the length extension units are fixedly connected through bolts and nuts, the higher the matching strength between the length extension units and the spindle is, the smaller the error is, and the lubricating degree between the spindle support sleeve, the inner wall of the body and the spindle is improved by adding lubricating oil into the length extension unit through lubricating holes.

Description

Technical Field

[0001] This application relates to the field of boring and milling machine technology, and more specifically, to a novel electric spindle for an engine valve boring and milling machine. Background Technology

[0002] The spindle structure of a boring and milling machine includes a milling spindle and an extendable milling spindle. After mounting the cutting tool on the spindle, high-speed rotary cutting can be achieved. The spindle's rotational accuracy is a key factor determining machining quality. The spindle's travel stroke is typically 600mm or 900mm. Traditional manual grinding or general-purpose boring machines are insufficient for high-precision, mass production needs and are inefficient. The problem is that when the spindle's extension stroke is large, the overhang length is significant, leading to spindle sagging. This results in poor spindle rotational runout accuracy during rotary machining, tool vibration, and large errors in workpiece flatness, roundness, and surface finish, leading to poor machining consistency, high rework rates, and reduced tool life. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a new type of electric spindle for engine valve boring and milling machine, which uses rolling bearings, spindle support sleeve and length extension unit to limit the rotational runout of the spindle, avoid the influence of large spindle extension stroke on machining accuracy, and improve machining accuracy. At the same time, the length extension unit can be assembled as needed, and the higher the fit strength between it and the spindle, the smaller the error.

[0004] The objective of this application is achieved through the following technical solution: A novel electric spindle for an engine valve boring and milling machine includes a spindle box and a spindle disposed inside the spindle box. A spindle support sleeve is provided on one side of the spindle box near the end of the spindle. The spindle box has a cavity inside. A rotating component is located inside the spindle box and is sleeved with the spindle. The spindle support sleeve is threadedly connected to the spindle box with screws. A length extension unit is also fitted onto one side of the spindle support sleeve. The length extension unit includes a body and mounting seats on both sides of the body. The mounting seats have threaded holes. The spindle support sleeve has a mounting hole on the side near the end of the spindle. The spindle support sleeve and the mounting seats are threadedly connected with screws.

[0005] As a further improvement of this application, the rotating component is a rolling bearing, and the outer wall of the rolling bearing is interference-fitted with the inner wall of the spindle box bearing.

[0006] As a further improvement to this application, the rotating component is provided in 1-3 parts.

[0007] As a further improvement of this application, both the main body and the spindle support sleeve are provided with through holes in the center, and the diameter of the through holes is equal to that of the spindle.

[0008] As a further improvement of this application, a connector is detachably mounted at the end of the spindle.

[0009] As a further improvement of this application, both the spindle support sleeve and the body are provided with lubrication holes.

[0010] As a further improvement of this application, the length extension unit is provided in multiple sets, and the multiple sets of length extension units are arranged sequentially, and the length extension units are fixedly connected to each other by bolts and nuts.

[0011] As a further improvement of this application, the spindle support sleeve is provided with a cooling oil inlet and an outlet.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes rolling bearings, a spindle support sleeve, and a length extension unit to limit the rotational runout of the spindle, avoiding the impact of a large spindle extension stroke on machining accuracy and improving machining accuracy. At the same time, the length extension unit can be assembled as needed, and the various length extension units are fixedly connected by bolts and nuts. The higher the fit strength with the spindle, the smaller the error. Lubricating oil is added to it through the lubrication hole to improve the lubrication between the spindle support sleeve and the inner wall of the body and the spindle. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure of a novel electric spindle for an engine valve boring and milling machine, provided for some embodiments of this application; Figure 2 A front view of a novel electric spindle for an engine valve boring and milling machine, provided for some embodiments of this application; Figure 3 for Figure 2 Sectional view at point AA; Figure 4 A schematic diagram of the rotating component mounting / connection structure provided for some embodiments of this application.

[0014] Icons: 1. Spindle box; 2. Spindle; 3. Spindle support sleeve; 4. Rotating component; 5. Mounting hole; 6. Length extension unit; 7. Body; 8. Mounting base; 9. Threaded hole; 10. Connector; 11. Lubrication hole; 12. Cooling oil inlet; 13. Outlet. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments. The same reference numerals in the accompanying drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.

[0016] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of this application may have fewer components, other components not shown in the drawings, different components, differently arranged components, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0017] See appendix Figures 1-4 This application discloses a novel electric spindle for an engine valve boring and milling machine, comprising a spindle housing 1 and a spindle 2 disposed inside the spindle housing 1. A spindle support sleeve 3 is provided on the side of the spindle housing 1 near the end of the spindle 2. The spindle housing 1 has an internal cavity. A rotating component 4 is located inside the spindle housing 1 and is sleeved with the spindle 2. The spindle 2 movably traverses the interior of the spindle housing 1. The rotating component 4 is a rolling bearing, and the outer wall of the rolling bearing is interference-fitted with the inner wall of the bearing in the spindle housing 1. The spindle support sleeve 3 is threadedly connected to the spindle housing 1 by screws. A screw hole is provided on the side of the spindle housing 1 near the spindle support sleeve 3. The two are fixed together by screws. A length extension unit 6 is also installed on one side of the spindle support sleeve 3. The length extension unit 6 includes a body 7 and mounting seats 8 on both sides of the body 7. The mounting seats 8 are provided with threaded holes 9. The spindle support sleeve 3 is provided with mounting holes 5 on the side near the end of the spindle 2. The spindle support sleeve 3 and the mounting seats 8 are fixed together by screws. The number of length extension units 6 can be adjusted according to the required extension length. The length extension units 6 are arranged in sequence and fixed together by bolts and nuts. The length extension unit 6 can perfectly fit the spindle 2 and reduce the rotational runout of the spindle 2.

[0018] Specifically, there are two rotating parts 4 to increase the contact area between the spindle 2 and the spindle box 1, thus ensuring that the spindle 2 is more stable.

[0019] Specifically, both the body 7 and the spindle support sleeve 3 have through holes inside, and the diameter of the through holes is equal to that of the spindle 2. The spindle support sleeve 3 and the body 7 can perform good rotational positioning of the spindle 2, ensuring the stability of the spindle 2 during rotation and improving the accuracy of its end.

[0020] The spindle has a detachable connector 10 at its end, which is used to replace various boring tools to process various workpieces. Different boring tools can also be replaced through the connector 10 to process workpieces of different shapes.

[0021] Both the spindle support sleeve 3 and the body 7 are provided with lubrication holes 11. Lubricating oil is added into them through the lubrication holes 11 to improve the lubrication between the inner wall of the spindle support sleeve 3 and the body 7 and the spindle 2.

[0022] The spindle support sleeve 3 is equipped with a cooling oil inlet 12 and an outlet 13. The cooling oil inlet 12, in conjunction with the oil cooling box and the circulation pipe, enables the spindle support sleeve 3 to be cooled.

[0023] In use, the length extension units 6 are arranged sequentially according to the extension length of the spindle 2. The length extension units 6 are fixedly connected by bolts and nuts. A suitable boring tool is installed at the connector 10. The rolling bearing, spindle support sleeve 3 and length extension units 6 limit the rotational runout of the spindle 2, avoid the influence of the large extension stroke of the spindle 2 on the machining accuracy, and improve the machining accuracy. Lubricating oil is added to the lubrication hole 11 to improve the lubrication between the spindle support sleeve 3, the inner wall of the body 7 and the spindle 2.

[0024] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art, all of which fall within the protection scope of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A novel electric spindle for an engine valve boring and milling machine, comprising a spindle housing (1) and a spindle (2) disposed inside the spindle housing (1), characterized in that, The spindle housing (1) is provided with a spindle support sleeve (3) on one side near the end of the spindle (2). The spindle housing (1) has a cavity inside. The spindle (2) is provided with a rotating part (4) inside the spindle housing (1). The rotating part (4) is sleeved with the spindle (2). The spindle support sleeve (3) is fixed to the spindle housing (1) by screw threads. A length extension unit (6) is also installed on one side of the spindle support sleeve (3). The length extension unit (6) includes a body (7) and mounting seats (8) on both sides of the body (7). The mounting seats (8) are provided with threaded holes (9). The spindle support sleeve (3) is provided with a mounting hole (5) on one side near the end of the spindle (2). The spindle support sleeve (3) and the mounting seats (8) are fixed to each other by screw threads.

2. The novel electric spindle for an engine valve boring and milling machine according to claim 1, characterized in that, The rotating component (4) is a rolling bearing, and the outer wall of the rolling bearing is interference-fitted with the inner wall of the bearing in the spindle box (1).

3. The novel electric spindle for an engine valve boring and milling machine according to claim 1, characterized in that, The rotating component (4) is provided in 1-3 parts.

4. The novel electric spindle for an engine valve boring and milling machine according to claim 1, characterized in that, Both the main body (7) and the spindle support sleeve (3) are provided with through holes, and the diameter of the through holes is equal to that of the spindle (2).

5. The novel electric spindle for an engine valve boring and milling machine according to claim 1, characterized in that, The spindle (2) is detachably fitted with a connector (10) at its end.

6. The novel electric spindle for an engine valve boring and milling machine according to claim 1, characterized in that, Both the main shaft support sleeve (3) and the main body (7) are provided with lubrication holes (11).

7. The novel electric spindle for an engine valve boring and milling machine according to claim 1, characterized in that, The length extension unit (6) is provided in multiple sets, and the multiple sets of the length extension unit (6) are arranged sequentially. The length extension units (6) are fixedly connected to each other by bolts and nuts.

8. The novel electric spindle for an engine valve boring and milling machine according to claim 1, characterized in that, The spindle support sleeve (3) is provided with a cooling oil inlet (12) and an outlet (13).

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