Cylinder bore chamfering device

Abstract

The utility model discloses a cylinder body hole chamfer device includes: frame, the platform of placing is set up on the frame, is equipped with the through -hole of passing through, the spinning cylinder is set up on the platform of placing, the lifting unit, and the fixed end is set up on the frame, the rotating unit, and its fixed end sets up the lifting end of lifting unit, the guide unit, controls rotating unit and moves up and down along the lifting direction of the lifting end of lifting unit, the cutting unit is set up in the last end of the pivot of selection unit, and is opposite the through -hole, the rotation limiting unit is set up in the upper end of cutting unit, and after partially or entirely passes through the through -hole, exposes the upper surface of platform of placing, and the displacement of the cylinder body that is placed on the platform of placing is limited on the plane of its hole axis vertical, the cutting limiting unit is set up in the fixed end of rotating unit, and is opposite the platform of placing, and the maximum displacement of limiting selection unit upward displacement is limited. The utility model discloses simple structure, the volume is smaller, and when chamfering, the operation is simple, and the chamfer quality also has the guarantee.

Description

Technical Field

[0001] This utility model relates to the field of cylinder component processing, specifically to a cylinder inner bore chamfering device. Background Technology

[0002] The cylinder block is the main body of the engine, connecting all the cylinders and the crankcase into one unit. It serves as the supporting framework for mounting pistons, crankshafts, and other parts and accessories. Due to installation and manufacturing requirements, the end faces of the cylinder block need to be chamfered between themselves and the inner wall of the bore.

[0003] Currently, chamfering of cylinder inner bores is mostly done using machine tools. However, machine tools are expensive, require a large area, have high unit time operating costs (consumables and maintenance), and are somewhat difficult to operate (requiring tool control and programming, etc.). Using machine tools for chamfering cylinder inner bores is relatively inefficient, but there are currently no other good low-cost, miniaturized, and easy-to-operate devices that can perform this chamfering process. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the purpose of this utility model is to provide a cylinder bore chamfering device with simple structure, small size, simple operation during chamfering, and guaranteed chamfering quality.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] The cylinder bore chamfering device includes:

[0007] frame;

[0008] The platform is set on the frame and has a through hole. The upper surface is provided with several positioning blocks.

[0009] A spinning cylinder is installed on the placement platform, with its spinning end facing the through hole; the cylinder body located on the placement platform is fixed to the placement platform;

[0010] The lifting unit has its fixed end mounted on the frame, with its lifting end pointing vertically upwards.

[0011] A rotating unit, the fixed end of which is set on the lifting end of the lifting unit, and its rotation axis is parallel to the lifting direction of the lifting end of the lifting unit;

[0012] The guide unit, with its fixed end mounted on the frame, controls the rotating unit to move up and down along the lifting direction of the lifting end of the lifting unit.

[0013] The cutting unit is located at the end of the rotating shaft of the selection unit, directly opposite the through hole; under the control of the lifting unit, the cutting part of the cutting unit passes through the through hole to chamfer the inner bore of the cylinder located on the placement platform.

[0014] A rotation limiting unit is set at the upper end of the cutting unit, and partially or completely passes through the through hole and is exposed on the upper surface of the placement platform to limit the displacement of the cylinder body placed on the placement platform in a plane perpendicular to its inner hole axis.

[0015] The cutting limit unit is set on the fixed end of the rotating unit, facing the placement platform, and limits the maximum upward displacement of the selection unit.

[0016] Furthermore, the rotating unit has a groove at the end of its rotating shaft;

[0017] The cutting unit includes:

[0018] The mounting column has its lower end set in a groove and is fixedly connected to the rotating shaft of the rotating unit;

[0019] A cutting seat is disposed at the upper end of the mounting column; the axis of the through hole is collinear with the axis of the cutting seat; the diameter of the through hole is larger than the diameter of the cutting seat; the rotation limiting unit is disposed at the upper end of the cutting seat.

[0020] A cutting section is provided on the upper surface of the cutting seat, and the cutting edge of the cutting section is inclined; the angle between the straight line where the cutting edge is located and the axis of the inner hole of the cylinder body is an acute angle, and the angle between the straight line where the cutting edge is located and the lower end face of the cylinder body is an acute angle.

[0021] Furthermore, the mounting post is inserted into the rotating shaft of the rotating unit via a threaded connection; the upper end of the mounting post is provided with an internal threaded hole;

[0022] The outer contour of the cutting seat is fusiform, and the upper end of the cutting seat has a through stepped hole in the axial direction; the cutting seat is threaded to the internal threaded hole on the mounting seat by a screw passing through the stepped hole, thereby fixing the cutting seat and the mounting post together.

[0023] The inner wall of the large hole of the stepped hole is provided with internal threads; the rotation limiting unit and the cutting seat are connected by internal threads in the large hole of the stepped hole.

[0024] Furthermore, the rotation limiting unit includes:

[0025] The connecting column has external threads on its outer surface, and its lower end is fixedly connected to the drilled thread of the stepped hole on the cutting seat;

[0026] The lower limit ring has an internal thread on its inner wall and is sleeved on the connecting column.

[0027] The upper limit ring has an internal thread on its inner wall and is sleeved on the connecting post, located above the lower limit ring;

[0028] The bearing is sleeved on the connecting column, with the upper end of its inner ring abutting against the lower surface of the upper limit ring, and the lower end of its inner ring abutting against the upper surface of the lower upper ring; the bearing is fixed to the connecting column by the upper limit ring and the lower limit ring.

[0029] The rotating sleeve is fitted over the outer ring of the bearing. When the cylinder body is fitted over the rotating sleeve, the outer ring surface of the rotating sleeve contacts the inner bore wall of the cylinder body. A chamfer is provided at the junction of the upper end face of the rotating sleeve and its cylindrical surface.

[0030] Furthermore, it also includes a pendulum limiting unit; the pendulum limiting unit includes:

[0031] The pendulum column is coaxially positioned at the upper end of the connecting column, and a chamfer is provided at the junction of its upper end surface and its cylindrical surface.

[0032] A swing limiter is provided on the lower surface of the spinning end of the spinning cylinder, and a circular groove is provided on its lower surface. The inner diameter of the circular groove is the same as the outer diameter of the swing limiter.

[0033] The swing limit spring is coaxially set at the bottom of the circular groove, and its upper end is fixed to the bottom of the circular groove. When the cylinder body is fixed on the placement platform, the inner hole of the cylinder body is limited by the rotating sleeve. The upper end of the swing limit column passes through the swing display seat and abuts against the lower end of the swing limit spring. The remaining compressible amount of the swing limit spring is greater than the height required for the cutting part to complete the chamfering of the inner hole of the cylinder body.

[0034] Furthermore, the rotating unit includes:

[0035] The lower end of the outer frame is fixedly connected to the lifting end of the lifting unit;

[0036] A rotary motor is installed inside the outer frame and fixedly connected to it; the rotating shaft of the rotary motor passes through the outer frame and faces the through hole.

[0037] The cutting limiting unit includes:

[0038] At least two sets of limiting components, all of which are arranged in a uniform circumferential array around the axis of the rotating unit;

[0039] The limiting component includes:

[0040] The limiting post is fixed to the outer frame at its lower end and faces the lower surface of the placement platform at its upper end. When the cutting unit completes the chamfering of the inner bore of the cylinder, the upper end of the limiting post abuts against the lower surface of the placement platform.

[0041] Furthermore, the limiting component also includes:

[0042] The lower collar has an inner diameter that is the same as the diameter of the limiting post. It is sleeved on the outer surface of the limiting post and has a fixing hole with internal threads on its surface. The lower collar is fixed to the limiting post by screws passing through the fixing hole and abutting against the limiting post.

[0043] The upper collar is coaxially fixed to the upper end face of the lower collar, and the inner diameter of the upper collar is larger than the inner diameter of the lower collar.

[0044] An anti-impact spring is sleeved on a limiting post, with its lower part located within the space maintained by the upper collar and the outer surface of the limiting post. The lower end of the anti-impact spring is fixedly connected to the upper end face of the lower collar. The outer diameter of the anti-impact spring is the same as the inner diameter of the upper collar. In its natural state, the upper end of the anti-impact spring extends beyond the upper end face of the limiting post.

[0045] Furthermore, the outer frame has a through mounting hole directly opposite the limiting post, and the inner wall of the mounting hole has an internal thread; the lower part of the limiting post has an external thread, and the lower thread of the limiting post is connected to the mounting hole.

[0046] The lower surface of the outer frame is provided with a sealing plate facing the mounting hole; after the limiting column is installed, its lower end face abuts against the upper plate surface of the sealing plate.

[0047] Furthermore, the guiding unit includes at least two guiding components, all of which are arranged in a uniform circumferential array around the axis of the rotating unit; the guiding components include:

[0048] The guide column is fixed at its upper end to the lower surface of the platform, and its axis is parallel to the lifting direction of the lifting end of the lifting unit; the outer frame is provided with guide holes corresponding to several guide columns.

[0049] The guide ring is located inside the guide hole and is slidably connected to the guide post.

[0050] Furthermore, the external frame includes:

[0051] The upper guide plate is fixedly connected to the fixed end of the rotary motor, and the lower end of the limiting post is fixedly connected to the upper guide plate;

[0052] The lower guide plate is located below the rotary motor and is fixedly connected to the lifting end of the lifting unit;

[0053] Several struts are arranged in a uniform circumferential array around the rotary motor, with their upper ends fixed to the lower surface of the upper guide plate and their lower ends fixed to the upper surface of the lower guide plate.

[0054] It also includes several sliding guide components, the fixed end of which is fixedly connected to the frame, and the sliding end is slidably connected to the lower guide plate to guide the lifting and lowering of the lower guide plate.

[0055] Due to the adoption of the above technical solution, this utility model has the following advantages:

[0056] 1. Based on the structure of the cylinder body and the chamfered area of ​​the inner hole, a specific cutting unit is set up to achieve directional chamfering of the inner hole of the cylinder body, without relying on the chamfering tool of a lathe or machining center.

[0057] 2. Set up a placement platform to fix the cylinder body. The lifting unit drives the rotating unit to rise and fall, and the rotating unit drives the cutting unit to rotate, so that the cutter on the cutting unit chamfers the inner hole of the cylinder body. The whole process is simple, highly controllable, and easy to operate.

[0058] 3. During the chamfering process, the rotation limiting unit not only limits the cylinder body, but also rotates relative to the chamfer of the inner hole of the cylinder body, so that the cutting unit does not affect the cylinder body when it is working.

[0059] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0060] The accompanying drawings of this utility model are described below:

[0061] Figure 1 This is a first three-dimensional structural schematic diagram of the cylinder bore chamfering device in the embodiment.

[0062] Figure 2 This is a schematic diagram of the second three-dimensional structure of the cylinder bore chamfering device in the embodiment.

[0063] Figure 3 This is a front view schematic diagram of the cylinder bore chamfering device in the embodiment.

[0064] Figure 4 for Figure 3 Schematic diagram of the structure at section AA in the middle.

[0065] Figure 5 for Figure 4 Enlarged structural diagram at point B.

[0066] Figure 6 for Figure 4 Enlarged structural diagram at point D.

[0067] Figure 7 for Figure 4 Enlarged structural diagram at point D.

[0068] Figure 8 for Figure 4 Enlarged structural diagram at point E in the middle.

[0069] Figure 9This is a schematic diagram of the left-side structure of the cylinder bore chamfering device in the embodiment.

[0070] Figure 10 for Figure 9 Schematic diagram of the structure at the FF section.

[0071] Figure 11 for Figure 10 Enlarged structural diagram at point G in the middle.

[0072] Figure 12 This is a three-dimensional structural diagram of the cylinder bore chamfering device in use during the embodiment.

[0073] Figure 13 This is a cross-sectional view of the cylinder bore chamfering device in use, as shown in the embodiment.

[0074] Figure 14 for Figure 13 Enlarged structural diagram at point H.

[0075] In the diagram: 1. Frame; 2. Placement platform; 21. Through hole; 22. Positioning block; 3. Spinning cylinder; 4. Lifting unit; 511. Upper guide plate; 5111. Mounting hole; 5112. Sealing plate; 5113. Guide hole; 512. Lower guide plate; 513. Support rod; 52. Rotary motor; 61. Guide column; 62. Guide ring; 71. Mounting column; 72. Cutting seat; 721. Stepped hole; 73. Cutting section; 81. Connecting column; 82. Upper limit ring; 83. Lower limit ring; 84. Bearing; 85. Rotating sleeve; 91. Limiting column; 92. Lower sleeve ring; 93. Upper sleeve ring; 94. Anti-impact spring; 101. Limiting column; 102. Limiting seat; 103. Limiting spring; 11. Guide assembly; 100. Cylinder body. Detailed Implementation

[0076] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0077] Example:

[0078] like Figures 1 to 11 As shown, the cylinder body 100 inner bore chamfering device includes:

[0079] Rack 1;

[0080] The placement platform 2 is set on the frame 1 and has a through hole 21. The upper surface is provided with several positioning blocks 22.

[0081] A spinning cylinder 3 is mounted on a placement platform 2, with its spinning end facing the through hole 21; the cylinder body 100 located on the placement platform 2 is fixed to the placement platform 2.

[0082] The lifting unit 4 has its fixed end mounted on the frame 1, with its lifting end pointing vertically upwards.

[0083] The rotating unit has its fixed end set on the lifting end of the lifting unit 4, and its rotation axis is parallel to the lifting direction of the lifting end of the lifting unit 4.

[0084] The guide unit, with its fixed end mounted on the frame 1, controls the rotating unit to move up and down along the lifting direction of the lifting end of the lifting unit 4.

[0085] The cutting unit is located at the end of the rotating shaft of the selection unit, directly opposite the through hole 21; under the control of the lifting unit 4, the cutting part 73 of the cutting unit passes through the through hole 21 to chamfer the inner hole of the cylinder body 100 located on the placement platform 2.

[0086] A rotation limiting unit is set at the upper end of the cutting unit, and partially or completely passes through the through hole 21 and is exposed on the upper surface of the placement platform 2. It limits the displacement of the cylinder body 100 placed on the placement platform 2 on the plane perpendicular to its inner hole axis.

[0087] The cutting limit unit is set on the fixed end of the rotating unit, facing the placement platform 2, to limit the maximum upward displacement of the selection unit.

[0088] A specific cutting unit is set up according to the structure of the cylinder body 100 and the chamfered area of ​​the inner hole to achieve directional chamfering of the inner hole of the cylinder body 100 without relying on the chamfering tool of a lathe or machining center. A placement platform 2 is set up to fix the cylinder body 100. The lifting unit 4 drives the rotating unit to rise and fall, and the rotating unit drives the cutting unit to rotate, so that the tool on the cutting unit chamfers the inner hole of the cylinder body 100. The whole process is simple, highly controllable, and easy to operate. During the chamfering process, the rotation limiting unit not only limits the cylinder body 100, but also rotates relative to the chamfer of the inner hole of the cylinder body 100, so that the operation of the cutting unit does not affect the cylinder body 100.

[0089] In this embodiment, the end of the rotating shaft of the rotating unit is provided with a groove;

[0090] The cutting unit includes:

[0091] Mounting column 71, with its lower end set in a groove, is fixedly connected to the rotating shaft of the rotating unit;

[0092] A cutting seat 72 is disposed at the upper end of the mounting post 71; the axis of the through hole 21 is collinear with the axis of the cutting seat 72; the diameter of the through hole 21 is larger than the diameter of the cutting seat 72; the rotation limiting unit is disposed at the upper end of the cutting seat 72.

[0093] A cutting section 73 is disposed on the upper surface of the cutting seat 72, and the cutting edge of the cutting section 73 is inclined; the angle between the straight line where the cutting edge is located and the axis of the inner hole of the cylinder body 100 is an acute angle, and the angle between the straight line where the cutting edge is located and the lower end face of the cylinder body 100 is an acute angle.

[0094] The cutting unit can be divided into multiple structural parts for easy replacement and maintenance, or the cutting base 72 and the mounting post 71 can be integrated into one structure.

[0095] The cutting part 73 (beveling knife) is provided with several locking grooves on the cutting seat 72; the cutting part 73 is set in the locking grooves and is fixed to the cutting seat 72 by fastening screws.

[0096] In this embodiment, the mounting post 71 is inserted into the rotating shaft of the rotating unit by means of a threaded connection; the upper end of the mounting post 71 is provided with an internal threaded hole;

[0097] The cutting seat 72 has a spindle-shaped outer contour, and the upper end of the cutting seat 72 has a through stepped hole 721 in the axial direction; the cutting seat 72 is threaded to the internal threaded hole on the mounting seat by a screw passing through the stepped hole 721, thereby fixing the cutting seat 72 and the mounting post 71.

[0098] The inner wall of the large hole of the stepped hole 721 is provided with internal threads; the rotation limiting unit and the cutting seat 72 are connected by the internal threads in the large hole of the stepped hole 721.

[0099] In this embodiment, the rotation limiting unit includes:

[0100] The connecting post 81 has an external thread on its outer surface, and its lower end is fixedly connected to the drilled thread of the stepped hole 721 on the cutting seat 72.

[0101] The lower limit ring 83 has an internal thread on its inner wall and is sleeved on the connecting post 81.

[0102] The upper limit ring 82 has an internal thread on its inner wall and is sleeved on the connecting post 81, located above the lower limit ring 83;

[0103] The bearing 84 is sleeved on the connecting column 81, with the upper end of its inner ring abutting against the lower surface of the upper limit ring 82, and the lower end of its inner ring abutting against the upper surface of the lower upper ring; the bearing 84 is limited and fixed on the connecting column 81 by the upper limit ring 82 and the lower limit ring 83.

[0104] The rotating sleeve 85 is sleeved on the outer ring of the bearing 84. When the cylinder body 100 is sleeved on the rotating sleeve 85, the outer ring surface of the rotating sleeve 85 contacts the inner wall of the cylinder body 100. The upper end face of the rotating sleeve 85 is chamfered at the junction with its cylindrical surface.

[0105] The bearing 84 is replaceable and maintainable by means of upper limit ring 82 and lower limit ring 83, while avoiding the rotation of the rotating sleeve 85 when loading and unloading the cylinder body 100.

[0106] In this embodiment, a pendulum limiting unit is also included; the pendulum limiting unit includes:

[0107] The pendulum column 101 is coaxially arranged at the upper end of the connecting column 81, and a chamfer is provided at the junction of its upper end surface and its cylindrical surface.

[0108] The swing limit seat 102 is set on the lower surface of the spinning end of the spinning cylinder 3, and a circular groove is provided on its lower surface. The inner diameter of the circular groove is the same as the outer diameter of the swing limit column 101.

[0109] The swing-limiting spring 103 is coaxially set at the bottom of the circular groove, and its upper end is fixed to the bottom of the circular groove. When the cylinder body 100 is fixed on the placement platform 2, the inner hole of the cylinder body 100 is limited by the rotating sleeve 85. The upper end of the swing-limiting column 101 passes through the swing seat and abuts against the lower end of the swing-limiting spring 103. The remaining compressible amount of the swing-limiting spring 103 is greater than the height required for the cutting part 73 to complete the chamfering of the inner hole of the cylinder body 100.

[0110] To prevent the cutting seat 72 from swaying after prolonged use, which could lead to instability in the chamfering process, a sway limiting unit is installed. This unit displays the amount of sway of the cutting seat 72 by limiting the sway of the sway limit post 101 and the sway limit seat 102. The sway limiting unit can restrict the lifting speed of the lifting unit 4, while also preventing the lifting unit 4 from malfunctioning and causing uncontrolled upward damage to the cutting section 73 (chamfering blade).

[0111] In this embodiment, the rotating unit includes:

[0112] The lower end of the outer frame is fixedly connected to the lifting end of the lifting unit 4;

[0113] A rotary motor 52 is installed inside the outer frame and is fixedly connected to the outer frame; the rotating shaft of the rotary motor 52 passes through the outer frame and faces the through hole 21.

[0114] The cutting limiting unit includes:

[0115] At least two sets of limiting components, all of which are arranged in a uniform circumferential array around the axis of the rotating unit;

[0116] The limiting component includes:

[0117] The lower end of the limiting post 91 is fixed to the outer frame, and the upper end is directly opposite the lower surface of the placement platform 2. When the cutting unit completes the chamfering of the inner hole of the cylinder body 100, the upper end of the limiting post 91 abuts against the lower surface of the placement platform 2.

[0118] In this embodiment, the limiting component further includes:

[0119] The lower collar 92 has an inner diameter that is the same as the diameter of the limiting post 91. It is sleeved on the outer surface of the limiting post 91 and has a fixing hole with internal thread on its surface. The lower collar 92 is fixed to the limiting post 91 by screws passing through the fixing hole and abutting against it.

[0120] The upper collar 93 is coaxially fixed to the upper end face of the lower collar 92, and the inner diameter of the upper collar 93 is larger than the inner diameter of the lower collar 92.

[0121] An anti-impact spring 94 is sleeved on a limiting post 91, with its lower part located within the space maintained by the upper collar 93 and the outer surface of the limiting post 91. The lower end of the anti-impact spring 94 is fixedly connected to the upper end face of the lower collar 92. The outer diameter of the anti-impact spring 94 is the same as the inner diameter of the upper collar 93. In its natural state, the upper end of the anti-impact spring 94 extends beyond the upper end face of the limiting post 91.

[0122] The anti-impact spring 94 can counteract the upward movement speed of the lifting unit 4, thus forcing the lifting cylinder of the lifting unit 4 to rise more slowly, preventing the cutting part 73 from directly impacting the cylinder body 100.

[0123] In this embodiment, the outer frame is provided with a through mounting hole 5111 opposite the limiting post 91, and the inner wall of the mounting hole 5111 is provided with an internal thread; the lower part of the limiting post 91 is provided with an external thread, and the lower part of the limiting post 91 is threadedly connected to the mounting hole 5111.

[0124] The lower surface of the outer frame is provided with a sealing plate 5112 facing the mounting hole 5111; after the limiting post 91 is installed, its lower end face abuts against the upper plate surface of the sealing plate 5112.

[0125] The lower end of the limiting post 91 is abutted by the sealing plate 5112, which can ensure that the lower end of the limiting post 91 is fixed. That is, during the equipment debugging process, there is no need to consider the influence of inaccurate insertion depth of the limiting post 91 on the upper guide plate 511, which would lead to inaccurate chamfer dimensions.

[0126] In this embodiment, the guiding unit includes at least two guiding components 11, and all the guiding components 11 are arranged in a uniform circumferential array around the axis of the rotating unit; the guiding component 11 includes:

[0127] The guide column 61 is fixed at its upper end to the lower surface of the placement platform 2, and its axis is parallel to the lifting direction of the lifting end of the lifting unit 4; the outer frame is provided with guide holes 5113 corresponding to a number of guide columns 61.

[0128] The guide ring 62 is located inside the guide hole 5113 and is slidably guided to the guide post 61.

[0129] In this embodiment, the external frame includes:

[0130] The upper guide plate 511 is fixedly connected to the fixed end of the rotary motor 52, and the lower end of the limiting post 91 is fixedly connected to the upper guide plate 511.

[0131] The lower guide plate 512 is located below the rotary motor 52 and is fixedly connected to the lifting end of the lifting unit 4.

[0132] Several support rods 513 are arranged in a uniform circumferential array around the rotary motor 52, with their upper ends fixed to the lower surface of the upper guide plate 511 and their lower ends fixed to the upper surface of the lower guide plate 512.

[0133] It also includes several sliding guide components 11, the fixed end of which is fixedly connected to the frame 1, and the sliding end is slidably connected to the lower guide plate 512 to guide the lifting and lowering of the lower guide plate 512.

[0134] The structure of the sliding guide assembly 11 is the same as that of the guide assembly 11, both of which are to improve the lifting stability when the lifting unit 4 controls the lifting of the rotating unit.

[0135] like Figure 12-14 As shown, the chamfering device for the inner bore of the cylinder body 100 in this embodiment is used as follows: The spinning wall of the spinning cylinder 3 is controlled to move away from the through hole 21, and the cylinder body 100 to be chamfered is fastened onto the placement platform 2. It is initially positioned by the positioning block 22, and simultaneously, the inner bore of the cylinder body 100 is fitted onto the rotating sleeve 85, thus fixing the cylinder body 100. The spinning cylinder 3 is then controlled to reset, and the limiting seat 102 on it fits onto the upper end of the limiting post 101.

[0136] Start the rotary motor 52 to rotate, and then control the lifting end of the lifting unit 4 to rise. At this time, the cutting seat 72 moves upward, and the cutting part 73 slowly contacts the cylinder body 100, and the inner hole of the cylinder body 100 is chamfered until the upper end of the limit post 91 abuts against the lower end of the placement platform 2.

[0137] Then, the lifting end of the lifting unit 4 is reset, the rotary motor 52 is turned off, and the spinning wall of the spinning cylinder 3 is moved away from the through hole 21 to release the fixation of the cylinder body 100. Finally, the cylinder body 100 is removed to obtain the chamfered cylinder body 100.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A cylinder bore chamfering device, characterized in that, include: frame; The platform is set on the frame and has a through hole. The upper surface is provided with several positioning blocks. A spinning cylinder is installed on a placement platform, with its spinning end facing the through hole; the cylinder body located on the placement platform is fixed to the placement platform; The lifting unit has its fixed end mounted on the frame, with its lifting end pointing vertically upwards. A rotating unit, the fixed end of which is set on the lifting end of the lifting unit, and its rotation axis is parallel to the lifting direction of the lifting end of the lifting unit; The guide unit, with its fixed end mounted on the frame, controls the rotating unit to move up and down along the lifting direction of the lifting end of the lifting unit; The cutting unit is located at the end of the rotating shaft of the selection unit, directly opposite the through hole; under the control of the lifting unit, the cutting part of the cutting unit passes through the through hole to chamfer the inner bore of the cylinder located on the placement platform. A rotation limiting unit is set at the upper end of the cutting unit, and partially or completely passes through the through hole and is exposed on the upper surface of the placement platform to limit the displacement of the cylinder body placed on the placement platform in a plane perpendicular to its inner hole axis. The cutting limit unit is set on the fixed end of the rotating unit, facing the placement platform, and limits the maximum upward displacement of the selection unit.

2. The cylinder bore chamfering device according to claim 1, characterized in that, The rotating unit has a groove at the end of its rotating shaft; The cutting unit includes: The mounting column has its lower end set in a groove and is fixedly connected to the rotating shaft of the rotating unit; A cutting seat is disposed at the upper end of the mounting column; the axis of the through hole is collinear with the axis of the cutting seat; the diameter of the through hole is larger than the diameter of the cutting seat; the rotation limiting unit is disposed at the upper end of the cutting seat. A cutting section is provided on the upper surface of the cutting seat, and the cutting edge of the cutting section is inclined; the angle between the straight line where the cutting edge is located and the axis of the inner hole of the cylinder body is an acute angle, and the angle between the straight line where the cutting edge is located and the lower end face of the cylinder body is an acute angle.

3. The cylinder bore chamfering device according to claim 2, characterized in that, The mounting post is inserted into the rotating shaft of the rotating unit via a threaded connection; the upper end of the mounting post is provided with an internal threaded hole; The outer contour of the cutting seat is fusiform, and the upper end of the cutting seat has a through stepped hole in the axial direction; the cutting seat is threaded to the internal threaded hole on the mounting seat by a screw passing through the stepped hole, thereby fixing the cutting seat and the mounting post together. The inner wall of the large hole of the stepped hole is provided with internal threads; the rotation limiting unit and the cutting seat are connected by internal threads in the large hole of the stepped hole.

4. The cylinder bore chamfering device according to claim 3, characterized in that, The rotation limiting unit includes: The connecting column has external threads on its outer surface, and its lower end is fixedly connected to the drilled thread of the stepped hole on the cutting seat; The lower limit ring has an internal thread on its inner wall and is sleeved on the connecting column. The upper limit ring has an internal thread on its inner wall and is sleeved on the connecting post, located above the lower limit ring; The bearing is sleeved on the connecting column, with the upper end of its inner ring abutting against the lower surface of the upper limit ring, and the lower end of its inner ring abutting against the upper surface of the lower upper ring; the bearing is fixed to the connecting column by the upper limit ring and the lower limit ring. The rotating sleeve is fitted over the outer ring of the bearing. When the cylinder body is fitted over the rotating sleeve, the outer ring surface of the rotating sleeve contacts the inner bore wall of the cylinder body. A chamfer is provided at the junction of the upper end face of the rotating sleeve and its cylindrical surface.

5. The cylinder bore chamfering device according to claim 4, characterized in that, It also includes a pendulum limiting unit; the pendulum limiting unit includes: The pendulum column is coaxially positioned at the upper end of the connecting column, and a chamfer is provided at the junction of its upper end surface and its cylindrical surface. A swing limiter is provided on the lower surface of the spinning end of the spinning cylinder, and a circular groove is provided on its lower surface. The inner diameter of the circular groove is the same as the outer diameter of the swing limiter. The swing limit spring is coaxially set at the bottom of the circular groove, and its upper end is fixed to the bottom of the circular groove. When the cylinder body is fixed on the placement platform, the inner hole of the cylinder body is limited by the rotating sleeve. The upper end of the swing limit column passes through the swing display seat and abuts against the lower end of the swing limit spring. The remaining compressible amount of the swing limit spring is greater than the height required for the cutting part to complete the chamfering of the inner hole of the cylinder body.

6. The cylinder bore chamfering device according to claim 1, characterized in that, The rotating unit includes: The lower end of the outer frame is fixedly connected to the lifting end of the lifting unit; A rotary motor is installed inside the outer frame and fixedly connected to it; the rotating shaft of the rotary motor passes through the outer frame and faces the through hole. The cutting limiting unit includes: At least two sets of limiting components, all of which are arranged in a uniform circumferential array around the axis of the rotating unit; The limiting component includes: The limiting post is fixed to the outer frame at its lower end and faces the lower surface of the placement platform at its upper end. When the cutting unit completes the chamfering of the cylinder inner bore, the upper end of the limiting post abuts against the lower surface of the placement platform.

7. The cylinder bore chamfering device according to claim 6, characterized in that, The limiting component also includes: The lower collar has an inner diameter that is the same as the diameter of the limiting post. It is sleeved on the outer surface of the limiting post and has a fixing hole with internal threads on its surface. The lower collar is fixed to the limiting post by screws passing through the fixing hole and abutting against the limiting post. The upper collar is coaxially fixed to the upper end face of the lower collar, and the inner diameter of the upper collar is larger than the inner diameter of the lower collar. An anti-impact spring is sleeved on a limiting post, with its lower part located within the space maintained by the upper collar and the outer surface of the limiting post. The lower end of the anti-impact spring is fixedly connected to the upper end face of the lower collar. The outer diameter of the anti-impact spring is the same as the inner diameter of the upper collar. In its natural state, the upper end of the anti-impact spring extends beyond the upper end face of the limiting post.

8. The cylinder bore chamfering device according to claim 7, characterized in that, The outer frame has a through mounting hole directly opposite the limiting post, and the inner wall of the mounting hole has an internal thread; the lower part of the limiting post has an external thread, and the lower thread of the limiting post is connected to the mounting hole. The lower surface of the outer frame is provided with a sealing plate facing the mounting hole; after the limiting column is installed, its lower end face abuts against the upper plate surface of the sealing plate.

9. The cylinder bore chamfering device according to claim 6, characterized in that, The guiding unit includes at least two guiding components, all of which are arranged in a uniform circumferential array around the axis of the rotating unit; the guiding components include: The guide column is fixed at its upper end to the lower surface of the platform, and its axis is parallel to the lifting direction of the lifting end of the lifting unit; the outer frame is provided with guide holes corresponding to several guide columns. The guide ring is located inside the guide hole and is slidably connected to the guide post.

10. The cylinder bore chamfering device according to claim 6, characterized in that, The external frame includes: The upper guide plate is fixedly connected to the fixed end of the rotary motor, and the lower end of the limiting post is fixedly connected to the upper guide plate; The lower guide plate is located below the rotary motor and is fixedly connected to the lifting end of the lifting unit; Several struts are arranged in a uniform circumferential array around the rotary motor, with their upper ends fixed to the lower surface of the upper guide plate and their lower ends fixed to the upper surface of the lower guide plate. It also includes several sliding guide components, the fixed end of which is fixedly connected to the frame, and the sliding end is slidably connected to the lower guide plate to guide the lifting and lowering of the lower guide plate.

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