Tailstock

Abstract

The utility model provides a tailstock belongs to mechanical technical field, it has solved the inconvenient operation problem when adjusting height of existing tailstock, the tailstock, including base and the main part of setting in the base upper portion, the main part and the base between horizontal setting all are the board shape's upper adjusting plate and lower adjusting plate, the bottom surface of upper adjusting plate and the top surface of lower adjusting plate all are the inclined surface of relative to horizontal direction inclined setting, the inclined direction and the inclination angle of the bottom surface of upper adjusting plate and the top surface of lower adjusting plate are same and two are abutting, the rear side fixed limit block of main part bottom, the horizontal wear and set of adjusting screw in the limit block upper with upper adjusting plate position corresponding place, this tailstock has the advantage that convenient operation.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a tailstock. Background Technology

[0002] High-end CNC machine tools possess multiple functions such as high speed, high precision, intelligence, composite operation, multi-axis linkage, and internet communication. Their development level is an important indicator of a country's modern industrialization. Installing and using a five-axis rotary table on a machine tool can improve production efficiency. Modern five-axis machining centers are manufactured with very advanced technology, achieving higher precision standards and completing complex operating procedures. Today, five-axis machining centers are widely used.

[0003] The existing five-axis machining center has a cradle turntable in the middle, one end of which is connected to the spindle for driving, and the other end is connected to a tailstock for auxiliary support. The tailstock is an important component of the cradle turntable's swing axis: ① ensuring the coaxiality of the rotation center of the main drive end and the rotation center of the tail end; ② improving the rigidity of the swing axis; ③ ensuring that the A-axis and C-axis intersect perpendicularly.

[0004] When installing and debugging a cradle turntable on-site, the coaxiality of the swing axis (A-axis) needs to be adjusted, that is, the coaxiality between the tailstock and the spindle. Currently, the common practice is to place an adjusting shim on the mounting surface at the bottom of the tailstock and adjust the tailstock's installation height by grinding the shim. However, in actual debugging, the grinding amount of the adjusting shim needs to be determined based on on-site measurement errors, often requiring several operations to achieve the correct adjustment, making the process cumbersome. Furthermore, during long-term use, five-axis machining centers experience changes in the zero point of the rotary axis due to machining vibration, environmental conditions, and improper operation. This necessitates removing the tailstock, re-measuring, and replacing the adjusting shim. Therefore, the existing tailstock presents a problem of inconvenient operation when adjusting its height. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a tail seat that solves the problem of inconvenient operation when adjusting the height of the existing tail seat.

[0006] The objective of this utility model can be achieved through the following technical solutions: A tailstock includes a base and a main body disposed above the base. The main body is detachably connected to the base by vertically arranged fasteners. The main body and the base are characterized by the horizontal arrangement of an upper adjusting plate and a lower adjusting plate, both plate-shaped, between the main body and the base. The upper adjusting plate is positioned above the lower adjusting plate, and both the top and bottom surfaces of the upper and lower adjusting plates are horizontally oriented planes. The lower adjusting plate is fixed to the base. Both the bottom and top surfaces of the upper and lower adjusting plates are inclined surfaces relative to the horizontal direction. The inclination direction and angle of the bottom and top surfaces of the upper and lower adjusting plates are the same and they are in contact with each other. The front of both inclined surfaces is higher than the rear. A limiting block is fixed to the rear side of the bottom of the main body. An adjusting screw is horizontally inserted through the limiting block at a position corresponding to the upper adjusting plate. When the adjusting screw rotates circumferentially, it can push the upper adjusting plate to move back and forth relative to the lower adjusting plate.

[0007] The front side of the tailstock refers to the side of the tailstock facing the cradle turntable, and the connection point on the tailstock for connecting with the cradle turntable is located on the front side of the top of the main body. To adjust the height of the tailstock, first loosen the fasteners connecting the main body and the base, then rotate the adjusting screw. This applies force to the upper adjusting plate, causing it to move back and forth. Because the bottom surface of the upper adjusting plate and the top surface of the lower adjusting plate are both inclined, and the front is higher than the back, when the upper adjusting plate moves forward relative to the lower adjusting plate, the main body rises relative to the base; conversely, when the upper adjusting plate moves backward, the main body lowers relative to the base. This adjusts the height of the tailstock, thereby adjusting the height of the connection point on the main body for connecting with the cradle turntable, ensuring coaxiality. After adjusting the overall height of the tailstock, re-tighten the fasteners to fix the relative position of the main body and the base. This adjustment process only requires loosening and tightening the fasteners and rotating the adjusting screw to adjust the height of the tailstock; it does not require disassembling the entire tailstock and performing multiple grinding operations, making the adjustment operation quite convenient. In addition, the limiting block and adjusting screw are located on the rear side of the main body, which can limit the upper adjusting plate to prevent it from moving backward along the inclined surface and ensure the stability of the overall structure.

[0008] In one of the aforementioned tailstock configurations, the adjusting screws include a push screw and a pull screw, both horizontally arranged along the front-to-back direction. The push screw is threadedly connected to the limiting block, and its front end abuts against the rear side of the upper adjusting plate. The pull screw is axially fixed to the limiting block, and its front end is threadedly connected to the rear of the upper adjusting plate. When the push screw rotates, its front end applies a force to the rear side of the upper adjusting plate, causing it to move forward. Conversely, when the pull screw rotates, it moves the upper adjusting plate backward. The push screw and pull screw achieve two-point positioning of the upper adjusting plate, further ensuring the stability of its position. Of course, in actual adjustment, both the push screw and pull screw need to be rotated for adjustment regardless of whether the upper adjusting plate moves forward or backward.

[0009] In one of the aforementioned tailstock designs, the upper adjusting plate has a vertically extending adjusting groove. This groove is elongated and its length extends along the front-to-back direction. The fastener passes through the adjusting groove and can move back and forth along its length. Passing the fastener through the adjusting groove does not affect the fixation between the main body and the base, and it also guides the upper adjusting plate as it moves back and forth, making adjustment convenient.

[0010] In one of the aforementioned tailstock designs, a vertically extending insertion hole is formed at the bottom of the main body. A pin is inserted into this insertion hole, with its lower end passing through the upper and lower adjustment plates and then into the base. This pin further enhances the stability of the connection between the main body and the base.

[0011] In one of the aforementioned tailstock designs, the front side of the limiting block abuts against the rear side of the bottom of the main body. The lower rear side of the limiting block has a downwardly protruding, block-shaped convex portion, and there is a gap between the front side of the convex portion and the rear side of the upper adjusting plate. The adjusting screw passes through the convex portion. The front side of the limiting block abuts against the main body, which can shield the top of the adjusting screw and protect it. The gap between the convex portion and the upper adjusting plate allows direct viewing of the adjusting screw, facilitating observation of its position and working status, and making adjustment operations more convenient.

[0012] Compared with existing technologies, the height of this tailstock can be adjusted simply by tightening and loosening the fasteners and rotating the adjusting screw. It does not require disassembling the entire tailstock and performing multiple grinding operations, making the adjustment operation more convenient. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the tailstock.

[0014] Figure 2 This is a structural diagram of the tailstock from another perspective.

[0015] Figure 3 This is a cross-sectional structural diagram of the tailstock fastener.

[0016] Figure 4 This is a cross-sectional view of the tailstock adjusting screw.

[0017] In the diagram, 1 is the base; 2 is the main body; 21 is the insertion hole; 3 is the fastener; 4 is the upper adjusting plate; 41 is the adjusting groove; 5 is the lower adjusting plate; 6 is the inclined surface; 7 is the limiting block; 71 is the protrusion; 8 is the adjusting screw; 81 is the front push screw; 82 is the back pull screw; and 9 is the pin. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1 and Figure 2 As shown, this tailstock includes a base 1 and a main body 2 disposed above the base 1. The main body 2 is detachably connected to the base 1 by a vertically arranged fastener 3.

[0020] The main body 2 and the base 1 are horizontally connected by an upper adjusting plate 4 and a lower adjusting plate 5, both plate-shaped. The upper adjusting plate 4 is positioned above the lower adjusting plate 5, and both the top and bottom surfaces of the upper adjusting plate 4 and the lower adjusting plate 5 are horizontal planes. The lower adjusting plate 5 is fixed to the base 1. The bottom surface of the upper adjusting plate 4 and the top surface of the lower adjusting plate 5 are inclined surfaces 6, which are inclined in the same direction and at the same angle, and are in contact with each other. Both inclined surfaces 6 are higher in the front and lower in the back. A limit block 7 is fixed to the rear side of the bottom of the main body 2 by fastening screws. An adjusting screw 8 is horizontally inserted on the limit block 7 at a position corresponding to the upper adjusting plate 4, and the adjusting screw 8 can push the upper adjusting plate 4 to move back and forth relative to the lower adjusting plate 5 when rotated circumferentially. In this embodiment, the limiting block 7 is rectangular, with its front side abutting against the rear side of the bottom of the main body 2. The lower side of the rear part of the limiting block 7 has a protruding part 71 that protrudes downward in a flat block shape, and there is a gap between the front side of the protruding part 71 and the rear side of the upper adjusting plate 4. The adjusting screw 8 passes through the protruding part 71.

[0021] Specifically, such as Figure 4 As shown, the adjusting screw 8 includes a push screw 81 and a pull screw 82, both horizontally arranged in the front-to-back direction. The push screw 81 is threadedly connected to the limiting block 7, and the front end face of the push screw 81 abuts against the rear side of the upper adjusting plate 4. The pull screw 82 is axially fixed to the limiting block 7, and the front end of the pull screw 82 is threadedly connected to the rear part of the upper adjusting plate 4. In this embodiment, the area on the limiting block 7 through which the pull screw 82 passes is a smooth hole, i.e., without internal threads. A nut is also threadedly connected to the outside of the pull screw 82, and the heads of the nut and the pull screw 82 abut against the front and rear sides of the protrusion 71, respectively.

[0022] like Figure 3 As shown, both ends of the upper adjusting plate 4 have vertically extending adjusting grooves 41. These grooves 41 are elongated and their lengths are aligned with the front-to-back direction. Fasteners 3 pass through the adjusting grooves 41 and can move back and forth along their length. In this embodiment, there are three adjusting grooves 41 on the left side of the upper adjusting plate 4, all aligned with the front-to-back direction. The three grooves 41 are spaced apart along the same straight line, with the spaces between them being solid. The upper adjusting plate 4 is solid at these spaces. There are two fasteners 3 on the left side of the main body 2, and their positions correspond to the positions of the adjusting grooves 41 at the front and back. The lower adjusting plate 5 has three vertically extending through holes, and the top of the base 1 has three vertically extending mounting holes, each corresponding to one of the through holes. The lower end of the fastener 3 passes through the main body 2, the adjusting grooves 41, and the through holes, and is threaded into the mounting hole of the base 1. The bottom of the main body 2 is vertically oriented with a insertion hole 21 between two fasteners 3. The position of the insertion hole 21 corresponds to the adjustment groove 41 in the middle position. A pin 9 is inserted into the insertion hole 21 of the main body 2, and the lower end of the pin 9 passes through the adjustment groove 41 and the through hole in sequence and is inserted into the mounting hole. Here, all three through holes are smooth holes. Among the three mounting holes, the front and rear two are threaded holes, while the middle one is a smooth hole. The upper end of the pin 9 has a recessed non-circular hole for inserting a tool to pull out the pin 9.

[0023] The front side of the tailstock refers to the side of the tailstock facing the cradle turntable, and the position on the tailstock for connecting with the cradle turntable is located on the front side of the top of the main body 2.

[0024] When adjusting the height of this tailstock, first pull out the pin 9, loosen the fastener 3 connecting the main body 2 and the base 1 but do not pull it out, so that the main body 2, the upper adjustment plate 4, the lower adjustment plate 5 and the base 1 are loose and not in a pressed state.

[0025] When it is necessary to raise the tailstock, simultaneously screw in the push screw 81 and pull screw 82 to push the upper adjusting plate 4 forward. At this time, the main body 2, the lower adjusting plate 5 and the base 1 are limited by the fastener 3 and will not move horizontally relative to each other. Then the upper adjusting plate 4 moves forward relative to the lower adjusting plate 5, the fastener 3 moves backward in the adjusting groove 41, the position of the upper adjusting plate 4 rises, and lifts the main body 2 to achieve the height adjustment of the tailstock.

[0026] Conversely, when the tailstock needs to be lowered, the push screw 81 and pull screw 82 are unscrewed in the opposite direction. The push screw 81 does not limit the rear side of the upper adjustment plate 4. The pull screw 82 pulls the upper adjustment plate 4 to move backward, and the height of the main body 2 is reduced.

[0027] After adjustment, tighten the screws that serve as fasteners 3, and then insert the pin 9 to achieve relative fixation between the main body 2 and the base 1.

[0028] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A tailstock, comprising a base (1) and a main body (2) disposed above the base (1), the main body (2) being detachably connected to the base (1) by vertically arranged fasteners (3), characterized in that, An upper adjustment plate (4) and a lower adjustment plate (5), both plate-shaped, are horizontally arranged between the main body (2) and the base (1). The upper adjustment plate (4) is located above the lower adjustment plate (5), and the top surface of the upper adjustment plate (4) and the bottom surface of the lower adjustment plate (5) are both horizontally arranged planes. The lower adjustment plate (5) is fixed to the base (1). The bottom surface of the upper adjustment plate (4) and the top surface of the lower adjustment plate (5) are both inclined surfaces (6) that are inclined relative to the horizontal direction. The inclination direction and inclination angle of the bottom surface of the upper adjustment plate (4) and the top surface of the lower adjustment plate (5) are the same and they are close to each other. The front position of the two inclined surfaces (6) is higher than the rear position. A limit block (7) is fixed to the rear side of the bottom of the main body (2). An adjusting screw (8) is horizontally inserted on the limit block (7) at the position corresponding to the upper adjustment plate (4). When the adjusting screw (8) rotates circumferentially, it can push the upper adjustment plate (4) to move back and forth relative to the lower adjustment plate (5).

2. A tailstock according to claim 1, characterized in that, The adjusting screw (8) includes a push screw (81) and a pull screw (82) that are both horizontally arranged in the front-back direction. The push screw (81) is threaded to the limiting block (7), and the front end face of the push screw (81) abuts against the rear side of the upper adjusting plate (4). The pull screw (82) is axially fixed to the limiting block (7), and the front end of the pull screw (82) is threaded to the rear of the upper adjusting plate (4).

3. A tailstock according to claim 1 or 2, characterised in that The upper adjustment plate (4) has an adjustment groove (41) extending vertically. The adjustment groove (41) is long and its length is set along the front-to-back direction. The fastener (3) passes through the adjustment groove (41) and can move back and forth along the length of the adjustment groove (41).

4. A tailstock according to claim 3, characterized in that, The bottom of the main body (2) has a vertically penetrating hole (21). A pin (9) is inserted into the hole (21) of the main body (2), and the lower end of the pin (9) passes through the upper adjustment plate (4) and the lower adjustment plate (5) in sequence and is inserted into the base (1).

5. A tailstock according to claim 1 or 2, characterised in that The front side of the limiting block (7) abuts against the rear side of the bottom of the main body (2). The lower side of the rear part of the limiting block (7) has a downward protruding block-shaped protrusion (71), and there is a gap between the front side of the protrusion (71) and the rear side of the upper adjusting plate (4). The adjusting screw (8) passes through the protrusion (71).

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