Support back milling cutter for commercial truck chassis trunnion suspension

Abstract

The utility model relates to a support back milling cutter for a business truck chassis trunnion suspension, which comprises a cutter handle used for being connected with a main shaft of a horizontal machining center, one end of the cutter handle is coaxially provided with a cutter head used for penetrating through an oval groove from the back face, and the peripheral side portion of one end, penetrating through the oval groove, of the cutter head is provided with a blade. The cutting edge part of the blade is positioned at one end facing the knife handle; the cutter head and the cutter handle are cylindrical, and the diameter of the cutter handle is larger than that of the cutter head; a connecting block is fixed to the peripheral side of the end, penetrating through the oval groove, of the tool bit, a blade fixing groove is formed in the connecting block, the blade is fixedly arranged in the blade fixing groove, and the cutting edge of the blade extends out of the blade fixing groove. The tool changing device is simple in structure, short in tool, capable of effectively reducing machining vibration and guaranteeing that the machining size is qualified, and capable of solving the machining condition that a long tool of a horizontal machining center cannot be changed.

Description

Technical Field

[0001] The utility model relates to a back milling cutter for a bracket of a business truck chassis trunnion suspension. Background Art

[0002] The elliptical groove on the back of the bracket for the business truck chassis trunnion suspension is relatively deep. When machining the end face of the elliptical groove, a cutter with a length of more than 444 mm is required for machining (as Figure 1 shown), but due to the long cutter, chatter will occur during machining, and the machining dimensions cannot be guaranteed. At the same time, the most important problem is that the cutter is too long, and the horizontal machining center cannot change the cutter, so machining from the front cannot be achieved. Therefore, it is necessary to improve the above technical problems, and this case is thus born. Summary of the Utility Model

[0003] The utility model makes improvements to the above-mentioned existing technical problems, that is, the technical problem to be solved by the utility model is to provide a back milling cutter for a bracket of a business truck chassis trunnion suspension.

[0004] In order to achieve the above object, the technical solution adopted by the utility model is: a back milling cutter for a bracket of a business truck chassis trunnion suspension, including a cutter handle for connecting with the spindle of a horizontal machining center, one end of the cutter handle is coaxially provided with a cutter head for passing through the elliptical groove from the back, a blade is arranged on the circumferential side of the end of the cutter head passing through the elliptical groove, and the cutting edge of the blade is located at one end facing the cutter handle.

[0005] Further, both the cutter head and the cutter handle are cylindrical, and the diameter of the cutter handle is larger than that of the cutter head.

[0006] Further, a connecting block is fixed on the circumferential side of the end of the cutter head passing through the elliptical groove, a blade fixing groove is arranged on the connecting block, the blade is fixedly arranged in the blade fixing groove, and the cutting edge of the blade extends out of the blade fixing groove.

[0007] Further, the included angle between the blade and the axis of the cutter head is 10 degrees.

[0008] Further, the connecting block is fixedly welded to the cutter head, and the blade is fixedly welded in the blade fixing groove.

[0009] Further, the included angle between the cutting edge of the blade and the axis of the cutter head is 89 degrees.

[0010] Further, the total length of the cutter is 120 mm.

[0011] Compared with the prior art, the utility model has the following effects: the structure of the utility model is simple, the cutter is short, which can effectively reduce machining chatter and ensure qualified machining dimensions, and can solve the machining situation where a longer cutter cannot be changed by a horizontal machining center. Brief Description of the Drawings

[0012] Figure 1 is a schematic diagram of machining the end face of the elliptical groove on the back of the bracket for the trunnion suspension of a conventional commercial truck chassis;

[0013] Figure 2 is a schematic diagram of machining the end face of the elliptical groove on the back of the bracket for the trunnion suspension of a commercial truck chassis in an embodiment of the present invention;

[0014] Figure 3 is a front view structural schematic diagram of an embodiment of the present invention;

[0015] Figure 4 is a side view structural schematic diagram of an embodiment of the present invention;

[0016] Figure 5 is a schematic diagram of the cooperation between the cutting tool and the bracket for the trunnion suspension of a commercial truck chassis in an embodiment of the present invention. Detailed Description of the Embodiment

[0017] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0018] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0019] As Figures 2 to 4 shown, a back milling cutter 1 for a bracket of a trunnion suspension of a commercial truck chassis according to the present invention includes a tool holder 3 for connecting to the spindle 2 of a horizontal machining center 11. One end of the tool holder 3 away from the spindle of the horizontal machining center is coaxially provided with a tool head 4. The tool head 4 is used to pass through an elliptical groove 6 from the back of the bracket 5 for the trunnion suspension of a commercial truck chassis. A cutting blade 7 is provided on the circumferential side of one end of the tool head 4 passing through the elliptical groove 6. After the tool head passes through the elliptical groove, the cutting blade is located on the front of the elliptical groove. The cutting edge 8 of the cutting blade 7 is located at one end facing the tool holder 3, and the cutting edge of the cutting blade is used to contact the end face of the elliptical groove to achieve machining.

[0020] In this embodiment, both the tool head 4 and the tool holder 3 are cylindrical, and the diameter of the tool holder 3 is larger than the diameter of the tool head 4.

[0021] In this embodiment, a connecting block 9 is fixedly arranged on the circumferential side of one end of the cutter head 4 penetrating through the elliptical groove 6. A blade fixing groove 10 is arranged on the connecting block 9. The blade 7 is fixedly arranged in the blade fixing groove 10, and the cutting edge portion 8 of the blade 7 extends out of the blade fixing groove 10.

[0022] In this embodiment, the included angle between the axis of the blade 7 and the cutter head 4 is 10 degrees.

[0023] In this embodiment, for firm fixation, the connecting block 9 is fixedly welded to the cutter head 4, and the blade 7 is fixedly welded in the blade fixing groove 10.

[0024] In this embodiment, the included angle between the cutting edge portion 8 of the blade 7 and the axis of the cutter head 4 is 89 degrees.

[0025] In this embodiment, the total length of the tool is 120 mm.

[0026] In this embodiment, the usage process is as follows: Start the horizontal machining center, position the tool. The spindle of the horizontal machining center does not rotate. Move the tool above the elliptical groove, and the tool feeds into the elliptical groove so that the cutter head passes through the elliptical groove. Then the horizontal machining center rotates, and the end face of the elliptical groove is reverse-milled using the circumferential milling program. After machining, the spindle of the horizontal machining center stops positioning, and the tool retracts out through the elliptical groove to complete the machining of the end face of the elliptical groove.

[0027] It should be noted that Figure 1 、 2 FIG. 22 and FIG. 23 show two clamping diagrams of this embodiment and the bracket for the kingpin suspension of the commercial truck chassis in the traditional technology on the horizontal machining center. Compared with the traditional technology, in this embodiment, the bracket for the kingpin suspension of the commercial truck chassis is clamped after being rotated 180 degrees, and the corresponding fixture remains unchanged.

[0028] If the present utility model discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by integral casting process) (except when it is obviously impossible to adopt the integral forming process).

[0029] In addition, unless otherwise stated, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present utility model include states or shapes that are approximate, similar, or close to it.

[0030] Any component provided by the present utility model can either be assembled from multiple separate components or be a single component manufactured by an integral forming process.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements on some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A back milling cutter for a bracket of a trunnion suspension of a commercial truck chassis, comprising a tool shank for connecting with the spindle of a horizontal machining center, characterized in that: One end of the tool shank is coaxially provided with a tool bit for passing through the elliptical groove from the back. A blade is provided on the circumferential side of the end of the tool bit passing through the elliptical groove, and the cutting edge of the blade is located at one end facing the tool shank.

2. The back milling cutter for the bracket of the trunnion suspension of a commercial truck chassis according to claim 1, wherein: Both the tool bit and the tool shank are cylindrical, and the diameter of the tool shank is larger than that of the tool bit.

3. The back milling cutter for the bracket of the trunnion suspension of the commercial truck chassis according to claim 1, characterized in that: A connecting block is fixed on the circumferential side of the end of the tool bit passing through the elliptical groove. A blade fixing groove is provided on the connecting block, and the blade is fixedly arranged in the blade fixing groove, and the cutting edge of the blade extends out of the blade fixing groove.

4. The back milling cutter for the bracket of the kingpin suspension of the commercial truck chassis according to claim 3, characterized in that: The included angle between the blade and the axis of the tool bit is 10 degrees.

5. The back milling cutter for the bracket of the kingpin suspension of the commercial truck chassis according to claim 3, characterized in that: The connecting block is fixedly welded to the tool bit, and the blade is fixedly welded in the blade fixing groove.

6. The back milling cutter for the bracket of the trunnion suspension of a commercial truck chassis according to claim 1, characterized in that: The included angle between the cutting edge of the blade and the axis of the tool bit is 89 degrees.

7. The back milling cutter for the bracket of the kingpin suspension of the commercial truck chassis according to claim 1, wherein: The total length of the tool is 120 mm.

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