Shaft body support for machining motor shaft

Abstract

The invention relates to motor shaft machining, in particular to a shaft body support for motor shaft machining, and is characterized in that a hook-shaped hanging plate arranged in a hanging mode is provided with a downward hooking face, the hooking face is an arc face matched with the peripheral wall of the equal-diameter section of a machine tool center, one side of the hanging plate is connected with a bracket through a connecting frame, and the bracket is provided with a V-shaped groove with an upward opening; the round core of the hooking face is located in the angular bisection face of the V-shaped groove, and a limiting fit for limiting the bracket to be close to or away from the round core of the hooking face is arranged between the connecting frame and the bracket. The arc-shaped hooking surface on the hanger plate is matched with the center of the machine tool in a hooking manner, the shaft to be machined is supported in the V-shaped groove in the bracket, and the concentricity of the shaft to be machined and the center of the machine tool can be adjusted only by adjusting the height of the bracket. And the negative influence of the mounting error between the bracket and the lathe bed and the matching error between the lathe center and the lathe bed on the concentricity of the to-be-processed shaft and the lathe center is eliminated.

Description

Technical Field

[0001] This invention relates to motor shaft machining, and more specifically to a shaft support for motor shaft machining. Background Technology

[0002] When machining motor shaft parts using machine tools, such as in grinding operations, the head and tail centers on the machine tool bed are used to insert the shaft parts into the center holes at both ends to achieve horizontal clamping. Considering the weight of the shaft being machined, lifting tools or supports are needed for loading and unloading the parts.

[0003] The patent document entitled "A Machine Tool" (publication number CN204195282U) discloses a technical solution including a machine tool bed, a shaft machining bracket on the machine tool bed, a bracket base, a vertically extending guide sleeve on the bracket base, a support screw slidably mounted in the guide sleeve, and an adjusting nut screwed on the support screw for pressing against the upper end of the guide sleeve during use and rotatably engaging with the upper end of the guide sleeve. An arc-shaped support plate with a concave arc surface facing upwards, engaging with the outer circumference of the machined shaft and supporting the machined shaft, is fixedly connected to the upper end of the support screw.

[0004] The patent document entitled "An Adjustable Centered High-Top Lathe Equipment for Motor Machining" (Publication No. CN222919650U, hereinafter referred to as Document 1) discloses a lathe body, with a lathe spindle at one end and a tailstock at the other end. The lathe spindle has a left center, and the tailstock has a right center. A motor to be machined is mounted between the left and right centers. The lathe body has a lifting seat capable of supporting the motor. A support slot plate is provided on the support frame, and the upper end of the support slot plate has a tapered groove for supporting the motor shaft. The support slot plate can move up and down on the support frame, thereby adjusting the support height for the motor shaft.

[0005] In the aforementioned technical solution, the bracket is connected to the machine tool bed, and the shaft to be processed is mounted on the bracket. By adjusting the height of the bracket, the height of the shaft core is positioned appropriately so that the machine tool center can insert into the center hole of the shaft's end face. However, in actual operation, it was found that because the bracket is installed with the machine tool bed as a reference, it has no direct connection with the machine tool center. Errors in the bracket's own structure, installation errors between the bracket and the bed, and installation errors between the machine tool center and the bed all affect the concentricity of the center hole of the shaft's end face and the machine tool center. Because of these errors, it is difficult to guarantee the concentricity of the shaft and the machine tool center simply by adjusting the height. This makes it easy for the center to cause severe eccentricity problems when inserting into the center hole of the shaft's end face, potentially damaging the center hole. Summary of the Invention

[0006] This invention provides a shaft support for machining motor shafts, which is mounted on the machine tool tip and uses the machine tool tip as an adjustment reference to eliminate the effects of installation errors between the support and the machine bed, and between the machine tool tip and the machine bed, thereby improving the concentricity of the shaft to be machined and the machine tool tip.

[0007] To achieve the above objectives, the technical solution adopted is as follows: a shaft support for machining motor shafts, wherein a hook-shaped hanging plate arranged in a vertical manner is provided with a hook surface facing downwards. The hook surface is an arc surface that matches the peripheral wall of the same diameter section of the machine tool tip. A bracket is connected to one side of the hanging plate through a connecting frame. The bracket is provided with an upward-opening V-shaped groove. The core of the hook surface is located in the angle bisector of the V-shaped groove. A limiting fit is provided between the connecting frame and the bracket to limit the bracket to approach or move away from the core of the hook surface.

[0008] Compared with the prior art, the technical advantages of this invention are as follows: When mounting the shaft to be processed on the top, the arc-shaped hook surface on the hanging plate is engaged with the peripheral wall of the equal-diameter section of the machine tool tip. The shaft to be processed is placed in the V-groove on the bracket. With the center of the hook surface located within the bisector of the V-groove, the shaft core of the shaft to be processed and the shaft core of the machine tool tip naturally share the same vertical plane. Only the height of the bracket needs to be adjusted to achieve the concentricity adjustment between the shaft to be processed and the machine tool tip. At the same time, since the shaft support is directly set on the machine tool tip, compared with the traditional support connected to the machine tool bed, the negative impact of the installation error between the support and the bed and the fit error between the machine tool tip and the bed on the concentricity of the shaft to be processed and the machine tool tip is eliminated. The concentricity of the shaft to be processed and the machine tool tip is more accurate, and the adjustment is also more convenient. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the present invention;

[0010] Figure 2 for Figure 1 Cross-sectional view along the KK axis;

[0011] Figure 3 This is a schematic diagram of the first embodiment of the suspended platform;

[0012] Figure 4 This is a schematic diagram of the assembly of the present invention with the machine tool center;

[0013] Figure 5 This is a schematic diagram of a second embodiment of the suspended platform. Detailed Implementation

[0014] The following is in conjunction with the appendix Figure 1-5 The present invention will be further described in detail below, including related content:

[0015] A shaft support for machining motor shafts includes a hook-shaped hanging plate 10 arranged in a vertical manner with a downward-facing hook surface 11. The hook surface 11 is an arc surface that matches the peripheral wall of the equal-diameter section A of the machine tool tip. A bracket 30 is connected to one side of the hanging plate 10 via a connecting frame 20. The bracket 30 has an upward-facing V-groove 31. The core of the hook surface 11 is located within the angle bisector of the V-groove 31. A limiting fit is provided between the connecting frame 20 and the bracket 30 to limit the bracket 30 from approaching or moving away from the core of the hook surface 11.

[0016] In the above technical solutions, such as Figure 4 As shown, when mounting the shaft B to be processed on the top, the arc-shaped hook surface 11 on the hanging plate 10 is engaged with the equal-diameter section of the shaft body of the machine tool center A. The hook surface 11 can fit tightly with the equal-diameter section of the shaft body of the machine tool center A, so that the core of the arc-shaped hook surface 11 is arranged cocentrically with the machine tool center A. At the same time, one side plate of the hanging plate 10 is set at the position that abuts against the center ring seat A1, and the center ring seat A1 is used for limiting and ensuring the stability of the hanging plate 10.

[0017] The shaft B to be processed is placed in the V-groove 31 on the bracket 30. The two side walls of the V-groove 31 support the shaft body of the shaft B, and the shaft core of the shaft B is naturally located within the angular bisecting plane of the V-groove 31. Furthermore, since the core of the hook surface 11 is located within the angular bisecting plane of the V-groove 31, and a limiting fit is provided between the connecting frame 20 and the bracket 30 to limit the support plate 30 to approach or move away from the core of the hook surface 11, the shaft core of the shaft B to be processed is naturally in the same vertical plane as the shaft core of the machine tool center A. Therefore, only the height of the bracket 30 needs to be adjusted to achieve the concentricity adjustment of the shaft B to be processed and the machine tool center A. Meanwhile, the hanging plate 10 uses the machine tool center A as the positioning base, thus directly setting the spindle support on the machine tool center A. Compared with the traditional support connected to the machine tool bed, it eliminates the negative impact of installation error between the support and the bed, and matching error between the machine tool center A and the bed on the concentricity of the axis to be processed B and the machine tool center A. The concentricity of the axis to be processed B and the machine tool center A is naturally more accurate, and it is also more convenient to adjust.

[0018] It should be noted that the machine tool center A includes a head center and a tail center. When mounting the spindle B to be machined, the spindle support of this application needs to be hung on both the head center and the tail center to adjust the height of the two ends of the spindle B. After the spindle B is mounted on the machine tool center A, the spindle support needs to be removed from the machine tool center A and the spindle B to avoid interference with the rotation of the machine tool center A and the spindle B. Secondly, the center ring seat A1 can be understood as part of the mounting base of the machine tool center A, and will not be explained in detail here.

[0019] As a preferred option, the length direction of the V-groove 31 is arranged parallel to the core direction of the hook surface 11. With the core of the machining shaft B parallel to the core of the machine tool tip A, the shaft B to be machined can form a surface contact fit with the groove wall of the V-groove 31 as much as possible. This ensures the stability of the support while increasing the contact area between the V-groove 31 and the shaft B to be machined, and avoids excessive stress at the contact position between the V-groove 31 and the shaft B to be machined, which could cause damage to the shaft.

[0020] As a preferred option, such as Figure 2 and Figure 3 As shown, the cross-sectional profile of the hook surface 11 in the direction perpendicular to its core is semi-circular. While ensuring that the hanging plate 10 can be hooked onto the machine tool tip A, the contact area between the hook surface 11 and the machine tool tip A is increased, thereby improving the stability of the hanging plate 10 on the machine tool tip A.

[0021] Furthermore, the angle bisector of the central angle of the hook surface 11 is coplanar with the angle bisector of the V-groove 31. After the shaft B to be processed is mounted in the V-groove 31, the hook surface 11 can fit against the upper half of the shaft body of the same diameter section of the machine tool center A, which can limit the position of the hanging plate 10 in the horizontal radial direction of the machine tool center A, while ensuring the hanging stability of the hanging plate 10 on the machine tool center A.

[0022] Combination Figure 3 and Figure 5 As shown, regarding the structure of the hanging plate 10, this application provides the following two specific design forms:

[0023] Firstly, such as Figure 3 As shown, the hanging plate 10 is composed of a split upper plate half 10a and a lower plate half 10b. The upper plate half 10a is arranged in a C-shape with the opening facing downwards, and the concave bottom surface of the upper plate half 10a forms a hook surface 11. The lower plate half 10b is L-shaped. The free end of the vertical section of the lower plate half 10b is hinged to one end of the upper plate half 10a through a hinge shaft 12. The free end of the horizontal section of the lower plate half 10b extends over the side of the upper plate half 10a away from the hinge shaft 12. A pin shaft 13 is provided in the overlapping area of ​​the free end of the vertical section of the lower plate half 10b and the upper plate half 10a, which passes through the upper plate half 10a and the lower plate half 10b. The axis direction of the pin shaft 13 and the hinge shaft 12 is consistent with the axis direction of the hook surface 11. The connecting frame 20 is connected to the horizontal section of the lower plate half 10b.

[0024] In this design, the hanging plate 10 is composed of an upper plate half 10a and a lower plate half 10b that are hinged together. Since the lower plate half 10b is L-shaped, there is a gap between the free end of the horizontal section of the lower plate half 10b and the free end of the upper plate half 10a. When installing the bracket on the machine tool center A, this gap facilitates the insertion (or removal) of the equal-diameter section of the machine tool center A so that the hook surface 11 can be hung on the peripheral wall of the equal-diameter section of the machine tool center A. After the shaft B to be processed is mounted on the V-groove 31 and the machine tool center A, the pin 13 is pulled out from the corresponding pin holes on the upper plate half 10a and the lower plate half 10b. This removes the relative rotation restriction between the upper plate half 10a and the lower plate half 10b, allowing them to open relative to each other without the bracket 30 interfering with the mounted shaft B. This also allows the lifting plate 10 to be removed from the machine tool without affecting the processing of the shaft B. Conversely, when a bracket needs to be installed on the machine tool center A, the pin 13 must be reinserted into the corresponding pin holes on the upper plate half 10a and the lower plate half 10b to restrict their relative rotation.

[0025] Furthermore, when the lower plate half 10b swings about the hinge shaft 12, the free end of the vertical section of the lower plate half 10b is in a position that avoids the cylindrical surface where the hook surface 11 is located. In this way, when the upper plate half 10a and the lower plate half 10b swing relative to each other and open, the plate part of the lower plate half 10b will not interfere with the machine tool center A and affect the opening of the upper plate half 10a and the lower plate half 10b.

[0026] Furthermore, a counterweight 14 is provided at the free end of the horizontal section of the lower plate half 10b. When the hanging plate 10 is hung on the peripheral wall of the equal diameter section of the machine tool tip A through the hook surface 11 on the upper plate half 10a, the angle bisector of the V-groove 31 is a vertical plane.

[0027] Considering that the lower plate half 10b is L-shaped, when the hanging plate 10 is hung on the equal-diameter section of the machine tool center A, the side with the vertical section on the lower plate half 10b is heavier than the other side due to the natural hanging position of the hanging plate 10. This may cause the entire hanging plate 10 to sway about the free end of the horizontal section of the lower plate half 10b with the machine tool center A as the axis, thus adversely affecting the core alignment operation of the shaft B to be processed. This solution uses a counterweight block 14 at the free end of the horizontal section of the lower plate half 10b to balance the weight of the two sides of the lower plate half 10b. After the hanging plate 10 is hung on the equal-diameter section of the machine tool center A, the angle bisector of the V-groove 31 on the bracket 30 is a vertical plane. Subsequently, by adjusting the height of the shaft B to be processed, the center hole of the end face of the shaft B to be processed is more reliably aligned with the machine tool center A.

[0028] Secondly, such as Figure 5As shown, the hanging plate 10 is composed of a split upper plate half 10a and a lower plate half 10b. The upper plate half 10a and the lower plate half 10b are C-shaped and their openings are arranged opposite each other. The bottom end faces of the upper plate half 10a are provided with constricted mortise grooves 10a1, and the groove length direction of the mortise grooves 10a1 is consistent with the circular core direction of the hook surface 11. The mortise grooves 10a1 penetrate the opposite side plate surfaces of the upper plate half 10a. The top ends of the lower plate half 10b are provided with tenons 10b1 that match the shape and size of the mortise grooves 10a1. The tenons 10b1 are embedded in the mortise grooves 10a1, and the tenons 10b1 and the groove walls and bottom of the mortise grooves 10a1 form a close-fitting sliding connection. The connecting frame 20 is connected at the lower end of the lower plate half 10b.

[0029] In this design, a mortise and tenon joint is used to create a detachable fit between the upper plate half 10a and the lower plate half 10b. After the shaft B to be processed is mounted on the V-groove 31 and the machine tool center A, the upper plate half 10a and the lower plate half 10b can be separated by controlling their relative sliding along the length of the mortise groove 10a1. This allows the entire bracket to be quickly removed from the machine tool center A and the shaft B to be processed without interference. Conversely, by inserting the tenon 10b1 into the mortise groove 10a1, the upper plate half 10a and the lower plate half 10b can be connected.

[0030] Combination Figure 2 and Figure 4 As shown, the connecting frame 20 is provided with a guide rod 21 arranged parallel to the bisector of the V-groove 31. The core direction of the guide rod 21 is perpendicular to the core of the hook surface 11. The bracket 30 is provided with a guide hole 32 for the guide rod 21 to pass through. The connecting frame 20 located below the bracket 30 is provided with an adjusting bolt 22. The adjusting bolt 22 is threadedly connected to the through hole 23 on the connecting frame 20 and is arranged parallel to the guide rod 21.

[0031] In this scheme, by rotating the adjusting bolt 22, the vertical displacement of the adjusting bolt 22 in the through hole 23 can be controlled, so that the adjusting bolt 22 can lift the bracket 30. Under the guidance of the guide rod 21 and the guide hole 32, the bracket 30 can be height adjusted on the connecting frame 20, thereby controlling the shaft core of the shaft to be processed B, which is mounted in the V-groove 31, to be closer to or farther away from the round core of the hook surface 11, or the shaft core of the machine tool center A.

[0032] Furthermore, to prevent the bracket 30 from rotating around the guide rod 21, symmetrical guide structures consisting of the guide rod 21 and guide holes 32 are arranged on the frame of the bracket 30 at the groove edges on both sides of the V-groove 31. By setting two sets of guide structures, the rotation of the bracket 30 around the guide rod 21 on the connecting frame 20 is restricted, ensuring the stability of the bracket 30 on the connecting frame 20. At the same time, the guide structures are set at the groove edges on both sides of the V-groove 31 to avoid interference between the guide structures and the shaft B to be processed, which is mounted in the groove cavity of the V-groove 31.

[0033] As a preferred solution, in order to avoid the problem of the bracket 30 moving in the radial direction of the guide rod 21 and affecting the concentricity of the shaft B to be processed and the machine tool center A, the rod body of the guide rod 21 is arranged to fit against the hole wall of the guide hole 32, so as to eliminate the gap in the radial direction between the guide rod 21 and the guide hole 32 as much as possible, so as to ensure the stability of the bracket 30 on the connecting frame 20.

[0034] Furthermore, the guide hole 32 is a stepped hole, and the hole wall of the small diameter section of the guide hole 32 is arranged in close contact with the smooth rod section of the guide rod 21. The top of the guide rod 21 is provided with an internal hexagon head 211, which is located in the large diameter section of the guide hole 32 and is spaced apart from the lower end face of the large diameter section of the guide hole 32. The lower end of the guide rod 21 is threadedly connected to the connecting bracket 20.

[0035] In this design, the guide rod 21 is actually a bolt. When installing the bracket 30, the guide rod 21 is inserted from top to bottom into the guide hole 32 of the bracket 30, and the lower end of the guide rod 21 is threaded into the corresponding threaded hole on the connecting frame 20, thus realizing the installation between the bracket 30 and the connecting frame 20. Here, an internal hex head 211 is provided at the upper end of the guide rod 21 to facilitate the pre-tightening operation of the bolt-like guide rod 21 in the guide hole 32. At the same time, the internal hex head 211 and the lower end face of the large-diameter section of the guide hole 32 provide a limit, preventing the bracket 30 from detaching from the connecting frame 20 and ensuring the overall structure of the bracket is stable and does not separate.

[0036] To ensure the strength of the shaft support, it is usually made of steel. Considering that the support has a certain weight, the top of the hanging plate 10 is equipped with a lifting ring 15. The support can be moved by hooking the lifting ring 15 with a sling.

Claims

1. A shaft support for machining motor shafts, characterized in that: The hanging plate (10) arranged in a vertical manner has a hook surface (11) facing downward. The hook surface (11) is an arc surface that matches the peripheral wall of the same diameter section of the machine tool tip (A). A bracket (30) is connected to one side of the hanging plate (10) through a connecting frame (20). The bracket (30) has an upward-facing V-groove (31). The core of the hook surface (11) is located in the angle bisector of the V-groove (31). A limiting fit is provided between the connecting frame (20) and the bracket (30) to limit the bracket (30) from approaching or moving away from the core of the hook surface (11).

2. The shaft support for machining motor shafts according to claim 1, characterized in that: The length direction of the V-groove (31) is parallel to the direction of the center of the hook surface (11).

3. The shaft support for machining motor shafts according to claim 1, characterized in that: The cross-sectional profile of the hook face (11) in the direction perpendicular to its core is semi-circular.

4. The shaft support for machining motor shafts according to claim 3, characterized in that: The angle bisector of the central angle of the hook face (11) is coplanar with the angle bisector of the V-groove (31).

5. The shaft support for machining motor shafts according to any one of claims 1-4, characterized in that: The hanging plate (10) is composed of a split upper plate half (10a) and a lower plate half (10b). The upper plate half (10a) is arranged in a C-shape with the opening facing downwards, and the concave bottom surface of the upper plate half (10a) forms a hook surface (11). The lower plate half (10b) is L-shaped. The free end of the vertical section of the lower plate half (10b) is hinged to one end of the upper plate half (10a) through a hinge shaft (12). The free end of the horizontal section of the lower plate half (10b) is... The upper plate half (10a) extends outward from the side away from the hinge shaft (12). The free end of the vertical section of the lower plate half (10b) is provided with a pin (13) that passes through the upper plate half (10a) and the lower plate half (10b) in the overlapping area with the upper plate half (10a). The axis direction of the pin (13) and the hinge shaft (12) is parallel to the circular core direction of the hook surface (11). The connecting frame (20) is connected to the horizontal section of the lower plate half (10b).

6. The shaft support for machining motor shafts according to claim 5, characterized in that: When the lower plate half (10b) swings about the hinge axis (12), the free end of the vertical section of the lower plate half (10b) is in a position that avoids the cylindrical surface where the hook surface (11) is located.

7. The shaft support for machining motor shafts according to claim 5, characterized in that: A counterweight (14) is provided at the free end of the horizontal section of the lower plate half (10b). When the hanging plate (10) is hung on the peripheral wall of the equal diameter section of the machine tool center (A) through the hook surface (11) on the upper plate half (10a), the angle bisector of the V-groove (31) is a vertical surface.

8. The shaft support for machining motor shafts according to any one of claims 1-4, characterized in that: The hanging board (10) is composed of a split upper half (10a) and a lower half (10b). The upper half (10a) and the lower half (10b) are C-shaped and their openings are arranged opposite each other. The bottom end faces of the upper half (10a) are provided with constricted tenons (10a1), and the length direction of the tenons (10a1) is consistent with the direction of the center of the hook surface (11). The tenons (10a1) are through. The upper half (10a) and the lower half (10b) are provided with tenons (10b1) at both ends of the top, which are in the same shape and size as the mortise (10a1). The tenons (10b1) are embedded in the mortise (10a1) and the tenons (10b1) and the mortise (10a1) form a sliding connection with the groove wall and the groove bottom. The connecting frame (20) is connected at the lower end of the lower half (10b).

9. The shaft support for machining motor shafts according to claim 1 or 2, characterized in that: The connecting frame (20) is provided with a guide rod (21) arranged parallel to the bisector of the V-groove (31). The core direction of the guide rod (21) is perpendicular to the core of the hook surface (11). The bracket (30) is provided with a guide hole (32) for the guide rod (21) to pass through. The connecting frame (20) located below the bracket (30) is provided with an adjusting bolt (22). The adjusting bolt (22) is threadedly connected to the through hole (23) on the connecting frame (20) and the adjusting bolt (22) is arranged parallel to the guide rod (21).

10. The shaft support for machining motor shafts according to claim 9, characterized in that: A guide structure consisting of a guide rod (21) and a guide hole (32) is symmetrically arranged on the frame of the bracket (30) located at the groove edge position on both sides of the V-groove (31).

11. The shaft support for machining motor shafts according to claim 9, characterized in that: The rod body of the guide rod (21) is arranged to fit against the wall of the guide hole (32).

12. The shaft support for machining motor shafts according to claim 11, characterized in that: The guide hole (32) is a stepped hole. The hole wall of the small diameter section of the guide hole (32) is arranged in close contact with the smooth section of the guide rod (21). The top of the guide rod (21) is provided with an internal hexagon head (211). The internal hexagon head (211) is located in the large diameter section of the guide hole (32) and the internal hexagon head (211) is spaced apart from the lower end face of the large diameter section of the guide hole (32). The lower end section of the guide rod (21) is threadedly connected to the connecting frame (20).

13. The shaft support for machining motor shafts according to claim 1, characterized in that: The top of the hanging plate (10) is provided with a hanging ring (15).

Images