Autorotation clamp for machining ship engine cylinder sleeve
By designing a rotating fixture for machining of marine engine cylinder liners, the rotation of the connecting shaft and the base is achieved by using dual-axis bearing connections, the problem of difficult direct processing of the end surface and inner hole positions in marine diesel engine cylinder liners is solved, and processing efficiency and accuracy are improved, and safety risks are reduced.
Patent Information
- Application Number
- CN202420636232.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-03-29
AI Technical Summary
During the maritime diesel engine cylinder liner lathe processing, it is difficult to directly process the end face and the inner holes in the end face, resulting in multiple turnovers and installation of the central bracket, resulting in wasted time and accuracy errors, and safety hazards.
A rotation fixture for processing the cylinder liner of a ship engine is designed. By setting a dual-axis bearing connection between the connecting shaft and the base, the rotation function between the connecting shaft and the base is realized, and the machine tool needs for high-speed rotation conditions.
The stable operation of the rotating fixture during high-speed rotation processing is achieved, which reduces the waste of time and accuracy errors caused by multiple clamping, and reduces safety hazards.
Smart Images
Figure CN222660898U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of ship engine cylinder liner processing, in particular to a self-rotating clamp used for processing ship engine cylinder liner. Background Art
[0002] When lathe machining the cylinder liner of a marine diesel engine, most of the end faces and the inner holes of the end faces cannot be directly machined by using a chuck or a center clamp. They need to be turned around and the center bracket installed for machining multiple times. As a result, multiple clamping will cause time waste and accumulation of precision errors. In addition, the clamping processing mode of the center bracket is equivalent to adding a transition fixture as a force-bearing part, which poses certain safety hazards during the high-speed rotation of the machine tool. Utility Model Content
[0003] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0004] A self-rotating fixture for machining a ship engine cylinder liner, wherein a connecting shaft for connecting to a machine tool is arranged on the base, and the connecting shaft and the base are connected via a double-axis bearing set so that the connecting shaft can rotate relative to the base.
[0005] Furthermore, the double-circumferential bearing kit includes a first bearing group and a second bearing group, both of which have outer rings that are interference fit in the base. The first bearing group and the second bearing group are coaxially arranged and share a bearing inner ring, and the connecting shaft is engaged with the bearing inner ring through a shaft neck.
[0006] Furthermore, an upper chamber for accommodating the first bearing group and a lower chamber for accommodating the second bearing group are opened at the center position of the base along its axial direction, and a connecting hole is provided between the upper chamber and the lower chamber, and the inner ring of the bearing passes through the connecting hole to connect with the first bearing group and the second bearing group.
[0007] Furthermore, a dust-proof cover is provided on the upper side of the first bearing group.
[0008] Furthermore, a detachable end kit is provided at the upper end of the connecting shaft, a mounting hole is provided at the center of the end kit, and the end kit is connected to the upper end of the connecting shaft via a fixing hole arranged at the end.
[0009] Furthermore, the outer edge of the upper end portion of the connecting shaft is provided with a plurality of inner grooves which are equally spaced around the axis thereof, and the openings of the inner grooves face outwards.
[0010] Furthermore, the first bearing group and the second bearing group are spherical roller bearings.
[0011] The beneficial effects of the utility model are:
[0012] The utility model provides a self-rotating fixture for processing a ship engine cylinder liner, which realizes the rotation function between the connecting shaft and the base by arranging a double-axis bearing connection between the connecting shaft and the base. The double-axis bearing adopts a structure of a common inner ring to ensure that the connecting shaft can adapt to the high-speed rotation working condition of the machine tool, and is used in conjunction with a fixed bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0015] Figure 2 yes Figure 1 sectional view of .
[0016] Figure 3 is a cross-sectional view of the base.
[0017] Figure 4 It is an exploded view of the utility model.
[0018] Figure 5 This is a schematic diagram of another embodiment of the connecting shaft. Figure 1 .
[0019] Figure 6 This is a schematic diagram of another embodiment of the connecting shaft. Figure 2 . DETAILED DESCRIPTION
[0020] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings. The above description is simplified for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.
[0021] The singular forms "a", "said" and "the" used in the specification include plural forms unless clearly indicated. The word "comprising" used in the specification indicates the existence of claimed features, but does not exclude the existence of one or more other features.
[0022] The following will describe exemplary embodiments of the present application with reference to the accompanying drawings. However, it should be understood that the present application can be presented in a variety of different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments. In all drawings, the same reference numerals represent the same or functionally identical elements.
[0023] Figure 1 The overall structure of a self-rotating fixture for processing a ship engine cylinder liner is shown. The connecting shaft 10 is rotatably arranged on a base 20, and a dustproof cover 31 is added from the upper side at the connection between the two. A plurality of tensioning mechanisms 21 are also arranged on the outer periphery of the base 20, which are fixed to the inner hole of the cylinder liner by a tensioning action by changing the outer diameter size.
[0024] Combined with reference Figure 2 and Figure 3 A cylindrical shape is provided at the center of the base 20 along its axial direction for accommodating the dual-axis bearing kit 30 ( Figure 4 ), the connecting hole 23 in the cavity divides the cavity into an upper chamber 24 and a lower chamber 23, and the aperture of the connecting hole 23 is smaller than the apertures of the upper and lower chambers 23, 24. The first bearing group 32 in the dual-axis bearing kit is arranged in the upper chamber 24, and the second bearing group 34 is arranged in the lower chamber 25. Specifically, the first bearing outer ring 33 of the first bearing group 32 is tightly engaged with the inner wall of the upper chamber 24, and the second bearing outer ring 35 of the second bearing group 34 is tightly engaged with the inner wall of the lower chamber 25. The first bearing group 32 and the second bearing group 34 share a bearing inner ring 36, so the inner ring 36 passes through the connecting hole 23 and its inner side is interference-connected with the lower journal 11 of the connecting shaft 10, thereby realizing the rotation function between the connecting shaft 10 and the base 20.
[0025] refer to Figure 4 The upper end of the connecting shaft 10 is provided with an end set 12 which is detachably connected thereto by means of a matching fastener and a fixing hole 14. A mounting hole 13 is provided at the center of the end set 12. The detachable connection mode enables the end set 12 to be connected to the machine tool through the mounting hole 13 before the connecting shaft 10 and the end set 12 are assembled when the fixture is assembled with the machine tool.
[0026] Figure 5 and Figure 6 Another embodiment of the connecting shaft is shown, in which a plurality of inner grooves 16 are arranged equally around the axis on the outer edge of the upper end 15, and the openings of the inner grooves 16 face outwards to cooperate with the clamping jaws of the machine tool for fixing.
[0027] In one embodiment, the first bearing group 32 and the second bearing group 34 are spherical roller bearings.
[0028] In the specification, when an element is referred to as being “on,” “fixed” to, “connected to,” “engaged to,” or the like, the element may be directly on, fixed to, connected to, engaged to, or contacting the other element, or intervening elements may be present.
[0029] It is to be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, a first element may be referred to as a second element without departing from the teachings of the present application.
Claims
1. A self-rotating fixture for processing a ship engine cylinder liner, characterized in that: A connecting shaft for connecting with a machine tool is arranged on the base, and the connecting shaft is connected to the base via a double-axis bearing set so that the connecting shaft can rotate relative to the base.
2. A self-rotating fixture for machining a ship engine cylinder liner as claimed in claim 1, characterized in that: The dual-axis bearing kit includes a first bearing group and a second bearing group whose outer rings are interference fit in the base. The first bearing group and the second bearing group are coaxially arranged and share a bearing inner ring. The connecting shaft is engaged with the bearing inner ring through a journal.
3. A self-rotating fixture for machining a ship engine cylinder liner as claimed in claim 2, characterized in that: An upper chamber for accommodating the first bearing group and a lower chamber for accommodating the second bearing group are opened at the center position of the base along its axial direction, a connecting hole is provided between the upper chamber and the lower chamber, and the inner ring of the bearing passes through the connecting hole to connect with the first bearing group and the second bearing group.
4. A self-rotating fixture for machining a ship engine cylinder liner as claimed in claim 3, characterized in that: A dust-proof cover is arranged on the upper side of the first bearing assembly.
5. The self-rotating fixture for machining a ship engine cylinder liner according to claim 2, characterized in that: The upper end of the connecting shaft is provided with a detachable end kit, a mounting hole is opened at the center of the end kit, and the end kit is connected to the upper end of the connecting shaft through a fixing hole arranged at the end.
6. A self-rotating fixture for machining a ship engine cylinder liner as claimed in claim 2, characterized in that: The outer edge of the upper end of the connecting shaft is provided with a plurality of inner grooves which are equally spaced around the axis thereof, and the openings of the inner grooves face outwards.
7. A self-rotating fixture for machining a ship engine cylinder liner according to any one of claims 2 to 6, characterized in that: The first bearing group and the second bearing group are spherical roller bearings.