Middle support mechanism for long shaft machining

Abstract

The utility model relates to a middle supporting mechanism for long shaft machining, which belongs to the technical field of machining and comprises a supporting seat. The first roller and the second roller are both rotationally mounted on the supporting seat, and the first roller and the second roller are used for supporting the long shaft from the lower left portion and the lower right portion correspondingly; the third roller and the fourth roller are rotationally mounted on the two mounting seats respectively, and the third roller and the fourth roller are used for pressing the long shaft from the upper left portion and the upper right portion respectively; the axial directions of the first roller, the second roller, the third roller and the fourth roller are the same as the long shaft; the mounting base is mounted on the supporting base in a left-right sliding mode, and a driving part used for driving the mounting base to move left and right is further mounted on the supporting base. According to the middle supporting mechanism, the first roller and the second roller are used for supporting the long shaft from the two sides of the lower portion, and the third roller and the fourth roller are used for pressing the long shaft from the two sides of the upper portion, so that the long shaft is better limited, and radial run-out generated in the long shaft machining process is more effectively eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining, and particularly relates to a center support mechanism for long shaft machining. Background Art

[0002] When machining a long shaft, one end is clamped by the three-jaw chuck of the machine tool, and the other end is machined by the tool. Since the span of the long shaft is relatively large, an additional middle support mechanism is installed on the machine tool to support the middle part of the long shaft and reduce the radial runout during the machining process.

[0003] However, most of the current center support mechanisms of this type can only support the long axis from below, but the radial runout generated during the long axis processing is not only downward, but also upward and sideways. Therefore, the current center support mechanisms of this type have limited effect in eliminating the runout generated during the long axis processing, resulting in large radial runout during the long axis processing, affecting the long axis processing accuracy. Utility Model Content

[0004] The utility model provides a center support mechanism for long shaft processing, which is used to solve the technical problem of radial runout during the long shaft processing.

[0005] The utility model is realized by the following technical scheme: a middle support mechanism for long shaft processing, comprising:

[0006] Support seat;

[0007] A first roller and a second roller are both rotatably mounted on the support seat, and the first roller and the second roller are used to support the long shaft from the lower left and lower right, respectively;

[0008] The third roller and the fourth roller are rotatably mounted on two mounting seats respectively, and the third roller and the fourth roller are used to press the long shaft from the upper left and upper right respectively;

[0009] The axial directions of the first roller, the second roller, the third roller and the fourth roller are all in the same direction as the long axis;

[0010] The mounting seat is mounted on the support seat in a slidable manner left and right, and a driving part for driving the mounting seat to move left and right is also mounted on the support seat.

[0011] Furthermore, in order to better implement the present invention, the support seat includes:

[0012] The bottom plate is provided with holes for passing external bolts;

[0013] A column, fixedly arranged in the middle of the bottom plate;

[0014] A horizontal plate is fixedly mounted on the top of the vertical column. The horizontal plate, the vertical column and the bottom plate form an I-shaped structure. The first roller and the second roller are both rotatably mounted on the horizontal plate.

[0015] The support plate is fixed on the horizontal plate. There are two support plates, which are respectively located at the left and right ends of the horizontal plate. The two mounting seats are respectively slidably mounted on the two support plates.

[0016] Furthermore, in order to better realize the utility model, the support plate is provided with two through holes, one in front and one in the back, and the mounting seat is provided with two sliding rods, which are respectively slidably inserted into the two through holes, so that the mounting seat can be slidably installed on the support plate left and right.

[0017] Furthermore, in order to better implement the present invention, the driving unit includes:

[0018] A cylinder having a piston rod;

[0019] The support plate is fixed with a mounting plate, and the cylinder is mounted on the mounting plate;

[0020] The support plate is also provided with a through hole, the piston rod is slidably inserted into the through hole, and the piston rod is connected to the mounting seat to drive the mounting seat to move left and right on the support plate.

[0021] Furthermore, in order to better implement the present invention, the through hole is located between the two through holes, and the through hole and the two through holes are respectively located on three vertices of the same isosceles triangle.

[0022] Furthermore, in order to better implement the present invention, it also includes:

[0023] The protective cover is bolted to the mounting plate, the protective cover is arranged outside the cylinder, and the protective cover is provided with heat dissipation holes for heat dissipation.

[0024] Furthermore, in order to better implement the present invention, a first reinforcing rib plate is provided between the mounting plate, the transverse plate and the column.

[0025] Furthermore, in order to better implement the present invention, a second reinforcing rib plate is provided between the first reinforcing rib plate and the bottom plate.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] The utility model provides a central support mechanism for long axis processing, which includes a support seat, a first roller, a second roller, a third roller, a fourth roller, a mounting seat and a driving unit. The first roller and the second roller are both rotatably mounted on the support seat. The first roller is used to support the long axis from the lower left, and the second roller is used to support the long axis from the lower right. The third roller and the fourth roller are respectively rotatably mounted on the two mounting seats mentioned above. The mounting seat is slidably mounted on the support seat left and right. The third roller and the fourth roller are respectively used to press the long axis from the upper left and upper right, and the axial directions of the first roller, the second roller, the third roller and the fourth roller are all in the same direction as the long axis. The driving unit is mounted on the support seat, and the driving unit is used to drive the mounting seat to move left and right on the support seat.

[0028] In the initial state, the two mounting seats carry the third roller and the fourth roller in a separated position respectively. At this time, a larger placement gap is formed between the third roller and the fourth roller, and an overlapping gap is formed between the first roller and the second roller. When in use, the long axis is placed in the overlapping gap from the placement gap, and the first roller and the second roller support the long axis from the lower left and the lower right respectively. Then, the driving part is used to drive the two mounting seats to drive the third roller and the fourth roller to approach respectively, so that the third roller and the fourth roller press the long axis from the upper left and the upper right respectively. Since the axial directions of the first roller, the second roller, the third roller and the fourth roller are in the same direction as the long axis, the long axis can rotate between the first roller, the second roller, the third roller and the fourth roller. Of course, one end of the long axis is clamped by the three-jaw chuck of the machine tool, and the other end of the long axis is processed by the tool. The center support mechanism supports the middle part of the long axis.

[0029] Through the above structure, not only the first roller and the second roller are used to support the middle part of the long axis from the lower sides, but also the third roller and the fourth roller are used to press the long axis from the upper sides. In this way, the long axis can be better limited, the radial runout generated during the long axis processing can be more effectively eliminated, and the long axis processing accuracy can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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 will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a structural schematic diagram of a middle support mechanism for long shaft processing provided by an embodiment of the utility model;

[0032] Figure 2yes Figure 1 The schematic diagram of the main structure of the middle support mechanism used for long shaft processing is shown;

[0033] Figure 3 yes Figure 1 An exploded view of the center support mechanism used for long shaft processing is shown;

[0034] Figure 4 It is a structural schematic diagram of the support base in the embodiment of the utility model;

[0035] Figure 5 It is a structural schematic diagram of the mounting base in the embodiment of the utility model.

[0036] In the figure:

[0037] 1-support seat; 11-bottom plate; 111-through hole; 12-column; 13-cross plate; 14-support plate; 141-through hole; 142-through hole; 15-mounting plate; 16-first reinforcing rib plate; 17-second reinforcing rib plate; 2-first roller; 3-second roller; 4-long axis; 5-third roller; 6-fourth roller; 7-mounting seat; 71-slide rod; 8-cylinder; 81-piston rod; 9-protective cover; 91-heat dissipation hole. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0039] The concepts of up, down, left, right, front, back, etc. in this embodiment are as follows: Figure 2 The concepts of up, down, left, right, front, back, etc. shown in the figure shall prevail. Specifically, the following Figure 2 The upper part is the top, Figure 2 The lower part is below, Figure 2 The left side is left, attached Figure 2 The right side is right, attached Figure 2 The end that extends into the paper is the front, Figure 2 The end that extends out of the paper is the back.

[0040] Embodiment 1:

[0041] like Figure 1-Figure 5 As shown, the central support mechanism for long shaft processing provided by the utility model includes a support seat 1, a first roller 2, a second roller 3, a third roller 5, a fourth roller 6, a mounting seat 7 and a driving part, wherein:

[0042] The first roller 2 and the second roller 3 are both rotatably mounted on the support seat 1. The first roller 2 and the second roller 3 are arranged side by side, and an overlapping gap for placing the long shaft 4 is formed between the first roller 2 and the second roller 3, wherein the first roller 2 is used to support the long shaft 4 from the lower left, and the second roller 3 is used to support the long shaft 4 from the lower right.

[0043] The third roller 5 and the fourth roller 6 are rotatably mounted on the two mounting seats 7, respectively. The two mounting seats 7 are slidably mounted on the support seat 1, and the two mounting seats 7 are respectively located on the left and right sides of the overlap gap. The third roller 5 and the fourth roller 6 are also arranged side by side, wherein the third roller 5 is used to press the long axis 4 from the upper left, and the fourth roller 6 is used to press the long axis 4 from the upper right. The axial directions of the first roller 2, the second roller 3, the third roller 5 and the fourth roller 6 are all in the same direction as the long axis 4.

[0044] The driving part is installed on the support seat 1, and the driving part is used to drive the mounting seat 7 to move left and right on the support seat 1. Of course, the two mounting seats 7 are respectively installed on the support seat 1 through two driving parts, that is, the two mounting seats 7 are respectively driven to translate by two driving parts.

[0045] In the initial state, the two mounting seats 7 carry the third roller 5 and the fourth roller 6 in a separated position. At this time, a larger placement gap is formed between the third roller 5 and the fourth roller 6. When in use, the long shaft 4 is inserted from the above placement gap and the long shaft 4 is placed in the above overlap gap. The first roller 2 and the second roller 3 support the above long shaft 4 from the lower left and lower right respectively. Then, the two mounting seats 7 are driven by the driving part to drive the third roller 5 and the fourth roller 6 to approach respectively, so that the third roller 5 and the fourth roller 6 press the above long shaft 4 from the upper left and upper right respectively. Since the axial directions of the first roller 2, the second roller 3, the third roller 5 and the fourth roller 6 are all in the same direction as the above long shaft 4, the long shaft 4 can rotate between the first roller 2, the second roller 3, the third roller 5 and the fourth roller 6. Of course, one end of the long shaft 4 is clamped by the three-jaw chuck of the machine tool, and the other end of the long shaft 4 is processed by a tool. The middle support mechanism supports the middle part of the long shaft 4.

[0046] Through the above structure, not only the first roller 2 and the second roller 3 are used to support the middle part of the long axis 4 from the lower sides, but also the third roller 5 and the fourth roller 6 are used to press the long axis 4 from the upper sides. In this way, the long axis 4 can be better limited, and the radial runout generated during the processing of the long axis 4 can be more effectively eliminated, thereby improving the processing accuracy of the long axis 4. In addition, it should be noted that the "middle support" in this article refers to support from the middle, and the "middle support mechanism for long axis processing" refers to a mechanism that supports the middle part of the long axis 4 during the processing of the long axis 4. The above-mentioned first roller 2, second roller 3, third roller 5 and fourth roller 6 have a large contact area with the long axis 4, can support the long axis 4 well, and have a low cost. In this way, the entire middle support mechanism can better eliminate the radial runout generated during the processing of the long axis 4 at a lower cost, and is more practical.

[0047] An optional implementation of this embodiment is as follows: the support seat 1 includes a bottom plate 11, a column 12, a horizontal plate 13 and a support plate 14, wherein:

[0048] The bottom plate 11 is a square plate, and a through hole 111 is provided on the bottom plate 11, and the through hole 111 is used to pass an external bolt, and the external bolt is used to connect the bottom plate 11 to an external object (such as a mounting table or a working table of a machine tool). The above-mentioned column 12 is welded and fixed to the middle part of the above-mentioned bottom plate 11, and the above-mentioned cross plate 13 is welded and fixed to the top of the above-mentioned column 12. At this time, the above-mentioned cross plate 13, the column 12 and the bottom plate 11 form an "I"-shaped structure, and the above-mentioned first roller 2 and the second roller 3 are both rotatably mounted on the cross plate 13. The above-mentioned support plate 14 is welded and fixed on the above-mentioned cross plate 13. The number of the support plates 14 is two, and the two support plates 14 are respectively located at the left and right ends of the cross plate 13, and the two mounting seats 7 are respectively slidably mounted on the two support plates 14.

[0049] Specifically, two through holes 141 are provided in the support plate 14, one in front and one in the back. Two slide bars 71 are provided on the mounting seat 7. The two slide bars 71 are respectively inserted into the two through holes 141 in a sliding manner, so that the mounting seat 7 can be slidably mounted on the support plate 14. The mounting seat 7 is provided with lugs, which are used to rotate the mounting roller, and the slide bars 71 and the lugs are respectively located on both sides of the mounting seat 7. In addition, the two slide bars 71 can also position and guide the left and right translation of the mounting seat 7, so that the mounting seat 7 can only move left and right on the support seat 1. It is easy to understand that the slide bars 71 and the through holes 141 are adapted.

[0050] Optionally, the driving part is a cylinder 8 having a piston rod 81, which is connected to a high-pressure gas source (such as a compressor) to drive the cylinder 8 to move. A mounting plate 15 is welded and fixed on the support plate 14, and the cylinder 8 is mounted on the mounting plate 15. A through hole 142 is also provided on the support plate 14, and the piston rod 81 is slidably inserted in the through hole 142. The piston rod 81 is connected to the mounting seat 7 to drive the mounting seat 7 to move left and right on the support plate 14. Specifically, when the piston rods 81 of the two cylinders 8 are extended, the two mounting seats 7 drive the third roller 5 and the fourth roller 6 to move closer, and when the piston rods 81 of the two cylinders 8 are retracted, the two mounting seats 7 drive the third roller 5 and the fourth roller 6 away. Of course, the driving part can also be an electric telescopic rod. A protective cover 9 is also bolted and fixed on the mounting plate 15, and the protective cover 9 is arranged outside the cylinder 8 to protect the cylinder 8, and the protective cover 9 is also provided with a heat dissipation hole 91 for heat dissipation.

[0051] Optimally, the through hole 142 is located between the two through holes 141, and the through hole 142 and the two through holes 141 are located at three vertices of the same isosceles triangle. In this way, the piston rod 81 of the cylinder 8 and the two slide bars 71 are located at three vertices of the same isosceles triangle.

[0052] An optional implementation of this embodiment is as follows: a first reinforcing rib plate 16 is arranged between the mounting plate 15, the cross plate 13 and the column 12, and a second reinforcing rib plate 17 is arranged between the first reinforcing rib plate 16 and the bottom plate 11. In this way, the load-bearing capacity of the entire central support mechanism is enhanced so as to support a heavier long shaft 4.

[0053] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope recorded in the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A middle support mechanism for long shaft processing, characterized in that: include: Support seat (1); The first roller (2) and the second roller (3) are both rotatably mounted on the support seat (1), and the first roller (2) and the second roller (3) are used to support the long shaft (4) from the lower left and lower right, respectively; The third roller (5) and the fourth roller (6) are rotatably mounted on two mounting seats (7) respectively, and the third roller (5) and the fourth roller (6) are used to press the long shaft (4) from the upper left and upper right respectively; The axial directions of the first roller (2), the second roller (3), the third roller (5) and the fourth roller (6) are all in the same direction as the long axis (4); The mounting seat (7) is mounted on the support seat (1) in a slidable manner to the left and right, and a driving unit for driving the mounting seat (7) to move to the left and right is also mounted on the support seat (1).

2. The middle support mechanism for long axis processing according to claim 1, characterized in that: The support base (1) comprises: The bottom plate (11) is provided with a through hole (111) for passing an external bolt; A column (12) is fixedly arranged in the middle of the bottom plate (11); A transverse plate (13) is fixedly mounted on the top of the upright column (12); the transverse plate (13), the upright column (12) and the bottom plate (11) form an "I"-shaped structure; the first roller (2) and the second roller (3) are both rotatably mounted on the transverse plate (13); A support plate (14) is fixedly mounted on the transverse plate (13). There are two support plates (14). The two support plates (14) are respectively located at the left and right ends of the transverse plate (13). The two mounting seats (7) are respectively mounted on the two support plates (14) in a left-right sliding manner.

3. The middle support mechanism for long axis processing according to claim 2, characterized in that: The support plate (14) is provided with two through holes (141) one in front and one in the back, and the mounting seat (7) is provided with two sliding rods (71). The two sliding rods (71) are respectively slidably inserted into the two through holes (141), so that the mounting seat (7) is slidably mounted on the support plate (14) leftward and rightward.

4. The middle support mechanism for long axis processing according to claim 3, characterized in that: The driving unit comprises: A cylinder (8) having a piston rod (81); The support plate (14) is fixedly provided with a mounting plate (15), and the cylinder (8) is mounted on the mounting plate (15); The support plate (14) is also provided with a through hole (142), the piston rod (81) is slidably inserted into the through hole (142), and the piston rod (81) is connected to the mounting seat (7) to drive the mounting seat (7) to move left and right on the support plate (14).

5. The middle support mechanism for long axis processing according to claim 4, characterized in that: The through hole (142) is located between the two through holes (141), and the through hole (142) and the two through holes (141) are respectively located on three vertices of the same isosceles triangle.

6. The middle support mechanism for long axis processing according to claim 4, characterized in that: Also includes: The protective cover (9) is bolted to the mounting plate (15), the protective cover (9) is arranged outside the cylinder (8), and the protective cover (9) is provided with heat dissipation holes (91) for heat dissipation.

7. The middle support mechanism for long shaft processing according to any one of claims 4 to 6, characterized in that: A first reinforcing rib plate (16) is provided between the mounting plate (15), the transverse plate (13) and the upright column (12).

8. The middle support mechanism for long shaft processing according to claim 7, characterized in that: A second reinforcing rib plate (17) is provided between the first reinforcing rib plate (16) and the bottom plate (11).

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