CN218693939U

CN218693939U - Tail seat assembly of machine tool

Info

Publication number: CN218693939U
Application number: CN202223121475.5U
Authority: CN
Inventors: 杨秀良; 吴挺; 张存玉; 金根初; 何欣荣
Original assignee: Wenling Taisheng Machine Tool Co ltd
Current assignee: Wenling Taisheng Machine Tool Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-03-24
Anticipated expiration: 2032-11-22

Abstract

The utility model provides a lathe tailstock subassembly belongs to mechanical technical field. It has solved the current short-lived problem of tailstock. The tailstock assembly of the machine tool comprises a base and a tailstock body arranged on the base, guide rails are arranged in front and back between the tailstock body and the base, the guide rails are distributed in the left and right direction, the guide rails are cross roller guide rails, each guide rail comprises a first guide rail and a second guide rail, the first guide rail is fixedly connected with the tailstock body, a row of mounting holes which are arranged in the front and back direction vertically penetrate through the second guide rail, a first threaded hole is formed in the base, the number of the first threaded holes is the same as that of the mounting holes, the positions of the first threaded holes correspond to those of the mounting holes one by one, a bolt which is screwed into the corresponding first threaded hole to fixedly connect the corresponding second guide rail with the base is arranged in each mounting hole, and the outer diameter of the rod part of the bolt is smaller than the inner diameter of the mounting hole so that the second guide rail can move left and right relative to the corresponding first guide rail; and a pre-tightening mechanism is arranged between each second guide rail and the base, and the pre-tightening mechanisms enable the second guide rails to have the trend of moving towards the first corresponding guide rails. The tailstock component of the machine tool has long service life.

Description

Machine tool tailstock assembly

Technical Field

The utility model belongs to the technical field of machinery, a tailstock subassembly, especially a machine tool tailstock subassembly are related to.

Background

The tailstock of the machine tool is mainly used for supporting long-shaft products so as to ensure the processing stability and precision of the whole product.

The existing tail seat generally adopts a hard rail (a shovel is matched after cast iron is subjected to high-frequency quenching) or a linear guide rail for moving and guiding. When the hard rail is used, the center height of the tailstock is lower and lower along with the abrasion of the two guide rail surfaces, so that the problem is brought to the precision of a subsequent product, the replacement of the hard rail needs to replace the whole part, and the subsequent maintenance cost is high; the linear guide transmission is because its equipment congenital clearance can't be eliminated, and the clearance of slider and guide rail exists always in the guide rail, and the rigidity is less than and more big along with the aggravation of guide rail wearing and tearing in the use, and stability in the product processing just receives serious influence, and follow-up also needs wholly to change.

Therefore, the hard rail or the linear guide rail can be replaced as a whole after being worn, and the problems of short service life and high maintenance cost exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a long service life's lathe tailstock subassembly.

The purpose of the utility model can be realized by the following technical proposal: a machine tool tailstock assembly comprises a base, a tailstock body arranged on the base and a driving part used for driving the tailstock body to move back and forth, wherein guide rails are arranged between the tailstock body and the base in a front-back mode, and are distributed in a left-right mode; and a pre-tightening mechanism is arranged between each second guide rail and the base, and the pre-tightening mechanisms enable the second guide rails to have the trend of moving towards the first corresponding guide rails.

In practical products, the cross roller guide rail further comprises a roller assembly arranged between the first guide rail and the second guide rail.

Under the common cooperation of the bolt rod part outer diameter smaller than the mounting hole inner diameter and the pre-tightening mechanism, the second guide rail can move towards the corresponding guide rail direction, so that a gap formed between the roller assembly and the corresponding first guide rail and the second guide rail under the long-term use of the guide rail is eliminated, the guide rail can still keep higher linear precision under the long-term use, the service life of the guide rail is effectively prolonged, the service life is long, and the later maintenance cost can be effectively reduced.

In the above-mentioned machine tool tailstock assembly, the above-mentioned mounting hole is formed by an upper hole and a lower hole which are coaxially arranged and communicated, the hole diameter of the upper hole is larger than that of the lower hole, the bolt head is positioned in the upper hole and tightly pressed on the bottom wall of the upper hole, the inner diameter of the upper hole is larger than the outer diameter of the bolt head, and the inner diameter of the lower hole is larger than the outer diameter of the bolt rod. The bolt is completely hidden between the mounting hole and the threaded hole I, so that after the guide rail is mounted, the top surface of the guide rail is free of protrusions, and the tailstock body is convenient to mount and design.

In foretell lathe tailstock subassembly, pretension mechanism runs through a plurality of screw holes two that set up on the base including controlling, and a plurality of screw holes are two-row that divides into about the distribution, are in and arrange around a plurality of screw holes two with one row, and two screw holes of two rows correspond two guide rails settings respectively, all are equipped with the screw in every screw hole two, and the screw rod portion sticiss on corresponding guide rail two. The screw is rotated to push the guide rail II to move, so that the guide rail I and the guide rail II are matched with the roller assembly without a gap, and the device has the advantages of simple structure and convenience in operation.

In the machine tool tailstock assembly, the guide structure used for moving and guiding the corresponding guide rail II is arranged between the screw and the corresponding guide rail II, so that the two-position adjustment of the guide rail is further facilitated, and the later maintenance is facilitated.

In foretell lathe tailstock subassembly, guide structure is including seting up the bar groove on the guide rail side, and two bar grooves correspond two rows of screw hole two settings respectively, and the bar groove length extends around, and the bar groove both ends are all uncovered, and the height in bar groove matches with screw rod portion external diameter, and screw rod portion terminal surface sticiss on bar groove diapire. The strip-shaped groove is matched with the screw, and meanwhile, the installation and the adjustment guiding of the second guide rail are realized, so that the assembly and the maintenance are further convenient.

As another scheme, in the above machine tool tailstock assembly, the guide structure includes guide holes provided on both sides of the guide rail, the number of the guide holes and the number of the threaded holes are the same, and the positions of the guide holes and the threaded holes are in one-to-one correspondence, the outer diameter of the screw rod portion is matched with the inner diameter of the guide hole, and the screw rod portion is inserted into the corresponding guide hole.

As another scheme, in the above machine tool tailstock assembly, the pre-tightening mechanism includes a push plate attached to one side of the second guide rail, the second guide rail is located between the two push plates, the base is fixed with the two linear guide rails, the two linear guide rails are both provided with locking slide blocks, and the two locking slide blocks are respectively and fixedly connected with the two push plates so that the push plates can horizontally move left and right.

Compared with the prior art, the tailstock assembly of the machine tool has the following advantages:

1. under the common cooperation of the bolt rod part outer diameter smaller than the mounting hole inner diameter and the pre-tightening mechanism, the second guide rail can move towards the corresponding guide rail direction, so that a gap formed between the roller assembly and the corresponding first guide rail and the second guide rail under the long-term use of the guide rail is eliminated, the guide rail can still keep higher linear precision under the long-term use, the service life of the guide rail is effectively prolonged, the service life is long, and the later maintenance cost can be effectively reduced.

2. The screw is rotated to push the guide rail II to move, so that the guide rail I and the guide rail II are matched with the roller assembly without a gap, and the device has the advantages of simple structure and convenience in operation.

3. The strip-shaped groove is matched with the screw, and meanwhile, the installation and the adjustment guiding of the second guide rail are realized, so that the assembly and the maintenance are further convenient.

Drawings

Fig. 1 is a perspective structure schematic diagram of the tailstock assembly of the machine tool.

Fig. 2 is a schematic view of a connection structure of the guide rail and the base.

Fig. 3 is a perspective view of the guide rail.

In the figure, 1, a base; 2. a tailstock body; 3. a lead screw; 4. a motor; 5. a guide rail; 5a, a first guide rail; 5b, a second guide rail; 5b1, mounting holes; 5b1a, upper holes; 5b1b, lower hole; 5b2, a strip groove; 5c, a roller assembly; 6. a bolt; 7. and (4) screws.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1, the tailstock assembly of the machine tool comprises a base 1, a tailstock body 2 arranged on the base 1, and a driving component for driving the tailstock body 2 to move back and forth. In the actual product, the drive assembly includes lead screw 3, installs nut on lead screw 3 and is used for driving lead screw 3 pivoted motor 4, and wherein, lead screw 3 rotates through the bearing and supports on base 1, and the nut links firmly with tailstock body 2.

In particular, the present invention relates to a method for producing,

the front and back of the tailstock body 2 and the base 1 are provided with two guide rails 5 which are distributed left and right. The guide rail 5 is a cross roller guide, which is a conventional product and is commercially available, and the guide rail 5 includes a first guide rail 5a, a second guide rail 5b, and a roller assembly 5c disposed between the first guide rail 5a and the second guide rail 5 b.

Wherein the content of the first and second substances,

the roller assembly 5c comprises a retainer and a row of rollers arranged on the retainer, and V-shaped grooves matched with the rollers are formed in two adjacent sides of the first guide rail 5a and the second guide rail 5 b.

Two guide rails one 5a are in between two guide rails two 5b, guide rail one 5a links firmly with tailstock body 2, it has one row of mounting hole 5b1 that is the front and back and arranges to run through vertically on the guide rail two 5b, be equipped with screw hole one on the base 1, screw hole one and mounting hole 5b1 quantity the same and position one-to-one, all be equipped with bolt 6 in every mounting hole 5b1, 6 pole portions screw in of bolt correspond screw hole one, 6 heads of bolt sticiss on corresponding guide rail two 5b to make guide rail two 5b and base 1 stable connection be in the same place.

Further, as shown in fig. 1 and fig. 2, the outer diameter of the bolt 6 is smaller than the inner diameter of the mounting hole 5b1, so that a gap exists between the rod part of the bolt 6 and the inner wall of the mounting hole 5b1, and the guide rail two 5b can move left and right relative to the corresponding guide rail one 5a on the premise of not influencing the stable positioning of the guide rail two 5b, and in the application, a pre-tightening mechanism is arranged between each guide rail two 5b and the base 1, and the pre-tightening mechanism enables the guide rail two 5b to have a tendency of moving in the direction of the corresponding guide rail one 5 a. Under the action of the outer diameter of the rod part of the bolt 6, which is smaller than the inner diameter of the mounting hole 5b1, and the pre-tightening mechanism, the guide rail II 5b can move towards the direction corresponding to the guide rail I5 a, so that a gap formed between the roller assembly 5c and the corresponding guide rail I5 a and the guide rail II 5b when the guide rail 5 is used for a long time is eliminated, the guide rail 5 can still keep high linear precision when the guide rail is used for a long time, the service life of the guide rail 5 is effectively prolonged, the service life is long, and the later maintenance cost can be effectively reduced.

Further, the mounting hole 5b1 is composed of an upper hole 5b1a and a lower hole 5b1b which are coaxially arranged and communicate with each other, the diameter of the upper hole 5b1a is larger than that of the lower hole 5b1b, the head of the bolt 6 is positioned in the upper hole 5b1a and pressed against the bottom wall of the upper hole 5b1a, the outer diameter of the upper hole 5b1a is larger than that of the head of the bolt 6, and the outer diameter of the lower hole 5b1b is larger than that of the rod of the bolt 6. The bolt 6 is completely hidden between the mounting hole 5b1 and the first threaded hole, so that after the guide rail 5 is mounted, the top surface of the guide rail has no bulge, and the tailstock body 2 is convenient to mount and design.

In the present embodiment, it is preferred that,

the pre-tightening mechanism has the following structure: as shown in fig. 1 to 3, a plurality of threaded holes two are formed in the base 1 in a left-right penetrating manner, the threaded holes are divided into two rows distributed left and right, the threaded holes two in the same row are arranged front and back, the two rows of threaded holes two correspond to the two guide rails 5b respectively, a screw 7 is arranged in each threaded hole two, and the rod part of each screw 7 is tightly pressed on the corresponding guide rail two 5 b. The screw 7 can be rotated to press the guide rail II 5b to move, so that the guide rail I5 a, the guide rail II 5b and the roller assembly 5c are matched without clearance, and the device has the advantages of simple structure and convenience in operation.

Further, a guide structure used for moving and guiding the corresponding guide rail II 5b is arranged between the screw 7 and the corresponding guide rail II 5b, so that the position of the guide rail II 5b is further convenient to adjust, and later maintenance is facilitated.

The guide structure is as follows: including seting up the bar groove 5b2 on two 5b sides of guide rail, and two bar grooves 5b2 correspond two rows of screw holes settings respectively, extend around the bar groove 5b2 length, and bar groove 5b2 both ends are all uncovered, and bar groove 5b 2's height matches with 7 pole portion external diameters of screw, and 7 pole portion terminal surfaces of screw sticiss on bar groove 5b2 diapire. The strip-shaped groove 5b2 is matched with the screw 7, and meanwhile, the installation and the adjustment guiding of the second guide rail 5b are realized, so that the assembly and the maintenance are further convenient.

Example two

The structure and principle of the second embodiment are basically the same as those of the first embodiment, and different points are as follows: the guide structure comprises guide holes arranged on the side surfaces of the second guide rails 5b, the number of the guide holes is the same as that of the threaded holes, the positions of the guide holes and the threaded holes correspond to one another, the outer diameter of the rod part of the screw 7 is matched with the inner diameter of the guide holes, and the rod part of the screw 7 is inserted into the corresponding guide holes.

EXAMPLE III

The structure and principle of the third embodiment are basically the same as those of the first embodiment, and different points are as follows: the pre-tightening mechanism comprises a push plate attached to one side of the second guide rail 5b, the second guide rail 5b is located between the two push plates, two linear guide rails are fixed on the base 1, locking slide blocks are mounted on the two linear guide rails, and the two locking slide blocks are fixedly connected with the two push plates respectively so that the push plates can move horizontally left and right.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The machine tool tailstock assembly comprises a base (1), a tailstock body (2) arranged on the base (1) and a driving part used for driving the tailstock body (2) to move back and forth, guide rails (5) are arranged between the tailstock body (2) and the base (1) in a front-back mode, the guide rails (5) are distributed in a left-right mode, the machine tool tailstock assembly is characterized in that the type of the guide rails (5) is a crossed roller guide rail, the guide rails (5) comprise a first guide rail (5 a) and a second guide rail (5 b) which are arranged side by side, the first guide rail (5 a) is located between the second guide rail (5 b), the first guide rail (5 a) is fixedly connected with the tailstock body (2), a row of mounting holes (5 b 1) which are arranged in the front-back mode vertically penetrates through the second guide rail (5 b), a first threaded hole is formed in the base (1), the first threaded hole is the first guide rail (5 b) and the mounting holes (5 b 1) in the same number and are in a position-to one-to-one correspondence, a bolt (6) corresponding to the first threaded hole is screwed into the corresponding threaded hole so that the second guide rail (5 b) can be fixedly connected with the base (1), and the right-left-right-to-left-right movement of the corresponding guide rail (5 b) can be smaller than the inner diameter of the first guide rail (5 b) so that the inner diameter of the first guide rail (5 a corresponding guide rail (5 b) can be smaller than the inner diameter of the first guide rail (5 b); and a pre-tightening mechanism is arranged between each second guide rail (5 b) and the base (1), and the pre-tightening mechanisms enable the second guide rails (5 b) to have a trend of moving towards the corresponding first guide rails (5 a).

2. The tailstock assembly according to claim 1, wherein the mounting hole (5 b 1) comprises an upper hole (5 b1 a) and a lower hole (5 b1 b) which are coaxially arranged and communicated, the diameter of the upper hole (5 b1 a) is larger than that of the lower hole (5 b1 b), the head of the bolt (6) is positioned in the upper hole (5 b1 a) and pressed against the bottom wall of the upper hole (5 b1 a), the inner diameter of the upper hole (5 b1 a) is larger than the outer diameter of the head of the bolt (6), and the inner diameter of the lower hole (5 b1 b) is larger than the outer diameter of the rod of the bolt (6).

3. The machine tool tailstock assembly according to claim 1 or 2, wherein the pre-tightening mechanism comprises a second plurality of threaded holes which penetrate through the base (1) from left to right, the second plurality of threaded holes are divided into two rows which are distributed from left to right, the second plurality of threaded holes in the same row are arranged in front of and behind the second plurality of threaded holes, the two rows of threaded holes are respectively arranged corresponding to the second two guide rails (5 b), a screw (7) is arranged in each second threaded hole, and the rod part of each screw (7) is tightly pressed on the corresponding second guide rail (5 b).

4. The tailstock assembly according to claim 3, characterized in that a guide structure for guiding the movement of the second counter-rail (5 b) is provided between the screw (7) and the second counter-rail (5 b).

5. The machine tool tailstock assembly according to claim 4, wherein the guiding structure comprises a strip-shaped groove (5 b 2) formed in the side surface of the second guide rail (5 b), the two strip-shaped grooves (5 b 2) are respectively arranged corresponding to the two rows of threaded holes, the length of the strip-shaped groove (5 b 2) extends forwards and backwards, the two ends of the strip-shaped groove (5 b 2) are open, the height of the strip-shaped groove (5 b 2) is matched with the outer diameter of the rod part of the screw (7), and the end surface of the rod part of the screw (7) is tightly pressed on the bottom wall of the strip-shaped groove (5 b 2).

6. The tailstock assembly according to claim 4, wherein the guide structure comprises a guide hole formed on the side of the second guide rail (5 b), the number of the guide hole and the number of the threaded holes are the same, the positions of the guide hole and the threaded holes correspond to each other, the outer diameter of the rod part of the screw (7) is matched with the inner diameter of the guide hole, and the rod part of the screw (7) is inserted into the corresponding guide hole.

7. The tailstock assembly of a machine tool according to claim 1 or 2, wherein the pre-tightening mechanism comprises a push plate abutting against one side of a second guide rail (5 b), the second guide rail (5 b) is located between the two push plates, two linear guide rails are fixed on the base (1), and locking sliding blocks are mounted on the two linear guide rails and fixedly connected with the two push plates respectively so that the push plates can move horizontally.