Novel improved four-point type lathe center frame

Abstract

The utility model discloses a novel improved four-point type lathe center frame which comprises a base, a fixed outer ring is installed on the base, a rolling inner ring is arranged on an inner ring of the fixed outer ring, and an adjustable bearing seat is arranged on an outer ring of the fixed outer ring. Rolling bearings are arranged on the adjustable bearing seats, the rolling bearings abut against the outer ring of the rolling inner ring, locking mechanisms are arranged on the adjustable bearing seats, and the locking mechanisms are used for locking the adjustable bearing seats on the fixed outer ring; operation is convenient, time and labor are saved, and product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe center stand structure field, a novel improvement four point formula lathe center stand. BACKGROUND

[0002] The center stand has important significance for the machining of long barrel rotary parts, and various center stands of different types and different specifications have been developed on the market, and the experience and technology are very mature. However, with the continuous development and progress of the aerospace field, parts gradually develop towards high precision and light weight. At present, for the turning machining of long barrel rotary parts, a horizontal lathe is usually used in cooperation with a center stand. The center stand is a very important auxiliary tool in lathe machining, mainly used for supporting long shaft workpieces. The center stand is installed on the guide rail of the lathe. The rotary part is prevented from sagging due to its own weight under the support of the center stand, and at the same time, the rotary center of the part is ensured to coincide with the main shaft of the machine tool, preventing the part from bending or vibrating due to its own weight or cutting force during machining, thereby ensuring the machining quality of the product.

[0003] The currently used lathe center stand structure includes a rolling inner ring and a fixed outer ring. The fixed outer ring is connected with the rolling inner ring by using a three-point rolling bearing, and the rolling inner ring is connected with the workpiece by using a four-point adjusting bolt, so that the rolling inner ring connected with the workpiece rotates with the main shaft at the same frequency.

[0004] However, there are still some disadvantages in the prior art:

[0005] (1) The number of support points is small, the stability is poor, the rolling inner ring is easy to shake, and the workpiece is easy to shift, even scrapped;

[0006] (2) The three-point adjusting support mode is a non-symmetrical structure, it is difficult to align the center of the rolling inner ring of the center stand with the center of the main shaft of the machine tool, and it is difficult to operate, time-consuming and laborious; INVENTION CONTENTS

[0007] To solve the above technical problems, the utility model provides a novel improvement four point formula lathe center stand.

[0008] The utility model discloses the following technical scheme can be realized.

[0009] The utility model provides a novel improvement four point formula lathe center stand, including the base, install the fixed outer ring on the base, set up the rolling inner ring on the inner ring of fixed outer ring, set up the adjustable bearing seat on the outer ring of fixed outer ring, adjustable bearing seat all sets up the rolling bearing, and the outer ring of rolling inner ring is in contact with rolling bearing, set up the locking mechanism on adjustable bearing seat, and the locking mechanism is used for locking adjustable bearing seat on the fixed outer ring.

[0010] Preferably, four adjustable bearing seats are arranged, and the four adjustable bearing seats are equidistantly arranged along the outer ring of the fixed outer ring.

[0011] Preferably, the locking mechanism comprises a fixed screw, a locking nut, a floating nut and an adjusting nut, the fixed screw is threaded on the adjustable bearing seat and is screwed to the fixed outer ring, the locking nut is threaded on the fixed screw and abuts against the outer ring of the fixed outer ring, the floating nut is sleeved on the fixed screw and abuts against the upper end surface of the adjustable bearing seat, and the adjusting nut is sleeved on the fixed screw and abuts against the floating nut.

[0012] Preferably, the fixed outer ring is composed of an upper outer ring and a lower outer ring, one end of the upper outer ring and the lower outer ring is rotationally connected through a rotating shaft, and the other end of the upper outer ring and the lower outer ring is connected through a fixed bolt.

[0013] Preferably, the side surface of the rolling inner ring is fixedly connected with a plurality of sleeves, the adjusting screw is threaded in the sleeve, the adjusting screw is directed to the center of the rolling inner ring, and the end of the adjusting screw close to the center of the rolling inner ring is fixedly connected with a pad.

[0014] Preferably, the fixed outer ring is provided with an oil hole.

[0015] Preferably, the fixed outer ring is provided with a lifting bolt.

[0016] Preferably, the outer ring of the rolling inner ring is provided with a guide rail in the circumferential direction, and the rolling bearing is abuttingly installed on the guide rail.

[0017] The beneficial effects of the utility model lie in:

[0018] (1) the number of supporting points of the rolling bearing on the rolling inner ring is increased, the stability of the rolling inner ring during operation is improved, the displacement of the workpiece caused by shaking is avoided, and the product quality is improved;

[0019] (2) the four-point type rolling bearing symmetrical supporting mode is adopted, the center frame centering time of the lathe is greatly saved, the operation is convenient, time and labor are saved;

[0020] (3) the locking mechanism is arranged on the adjustable bearing seat, the deviation of the rolling inner ring during operation is avoided, and the product quality is improved. DRAWINGS

[0021] Figure 1 is a structural schematic view of the utility model;

[0022] In the figure: 1-base; 2-fixed outer ring; 21-upper outer ring; 22-lower outer ring; 3-rolling inner ring; 4-adjustable bearing seat; 5-rolling bearing; 6-locking mechanism; 61-fixed screw; 62-locking nut; 63-floating nut; 64-adjusting nut; 65-cover plate; 7-fixing bolt; 8-rotating shaft; 9-sleeve; 10-adjusting screw; 11-pad; 12-oil filling hole; 13-lifting bolt. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0025] In the embodiment, with reference to Figure 1 , a base 1 is provided, the base 1 is provided with a fixed outer ring 2, the fixed outer ring 2 is composed of an upper outer ring 21 and a lower outer ring 22, one end of the upper outer ring 21 and the lower outer ring 22 is rotatably connected together through a rotating shaft 8, the other end of the upper outer ring 21 and the lower outer ring 22 is connected together through a fixing bolt 7, the base 1 and the lower outer ring 22 are integrally formed, and the inner ring of the fixed outer ring 2 is movably provided with a rolling inner ring 3;

[0026] The inner ring of the fixed outer ring 2 is provided with the rolling inner ring 3, and the outer ring of the fixed outer ring 2 is provided with four adjustable bearing seats 4, the four adjustable bearing seats 4 are equidistantly distributed along the outer ring of the fixed outer ring 2, the rolling bearing 5 is arranged on the adjustable bearing seat 4, a guide rail is arranged on the outer ring of the rolling inner ring 3, the cross section of the guide rail and the edge of the rolling inner ring 3 forms a "U" shape, so that the rolling bearing 5 abuts against the guide rail, and the outer ring edge of the rolling inner ring 3 and the inner ring edge of the fixed outer ring 2 are gap-fitted, the rolling inner ring 3 is supported and positioned through the four-point rolling bearing 5, and the rolling inner ring 3 of the center frame is quickly coincided with the center of the machine tool.

[0027] In the embodiment, with reference to Figure 1Specifically, oil holes 12 are formed on the upper outer ring 21, two oil holes 12 are arranged for adding a small amount of lubricating oil into the center frame to reduce the rolling friction of the center frame and improve the service life of the center frame of the lathe; and a closing bolt is arranged on the oil hole 12 to block the oil hole 12. When it is necessary to add lubricating oil to the oil hole 12, the closing bolt is directly removed for adding, and the operation process is convenient.

[0028] In the embodiment, the upper outer ring 21 is fixedly connected with the lifting bolt 13, so that the upper outer ring 21 can be pulled out, and the installation of the entire center frame is facilitated. Figure 1

[0029] In the embodiment, the upper outer ring 21 is fixedly connected with the lifting bolt 13, so that the upper outer ring 21 can be pulled out, and the installation of the entire center frame is facilitated. Figure 1 The adjustable bearing seat 4 is provided with a locking mechanism 6, and the locking mechanism 6 is used for locking the adjustable bearing seat 4 on the fixed outer ring 2; the locking mechanism 6 comprises a fixed screw rod 61, a locking nut 62, a floating nut 63 and an adjusting nut 64, the fixed screw rod 61 is threadedly arranged on the adjustable bearing seat 4 and is threadedly connected to the fixed outer ring 2, the locking nut 62 is threadedly sleeved on the fixed screw rod 61 and abuts against the outer ring of the fixed outer ring 2, the upper end surface of the adjustable bearing seat 4 is provided with a cover plate 65, the fixed screw rod 61 is arranged through the cover plate 65, the floating nut 63 is sleeved on the fixed screw rod 61 and abuts against the cover plate 65, and the adjusting nut 64 is sleeved on the fixed screw rod 61 and abuts against the floating nut 63.

[0030] Four threaded holes are formed on the fixed outer ring 2, the four threaded holes are equidistantly distributed along the outer ring of the fixed outer ring 2, the four adjustable bearing seats 4 are sequentially arranged at the corresponding threaded holes, the fixed screw rod 61 is sequentially arranged through the adjustable bearing seat 4, the locking nut 62 is screwed at one end of the fixed screw rod 61 arranged through the adjustable bearing seat 4, the fixed screw rod 61 is sequentially screwed into the corresponding threaded hole, the locking nut 62 abuts against the outer ring surface of the fixed outer ring 2, the connection between the fixed screw rod 61 and the fixed outer ring 2 is further reinforced, the floating nut 63 is screwed into the end of the fixed screw rod 61, the floating nut 63 abuts against the upper end surface of the cover plate 65, the adjusting nut 64 is further screwed in, the adjusting nut 64 abuts against the floating nut 63, the adjustable bearing seat 4 is fixed, and the stability of the adjustable bearing seat 4 on the fixed outer ring 2 is improved.

[0031] In the embodiment, the upper outer ring 21 is fixedly connected with the lifting bolt 13, so that the upper outer ring 21 can be pulled out, and the installation of the entire center frame is facilitated. Figure 1 The side surface of the rolling inner ring 3 is fixedly connected with a plurality of sleeves 9, the adjusting screw rod 10 is threadedly arranged in the sleeve 9, the adjusting screw rod 10 is directed to the center of the rolling inner ring 3, and the end of the adjusting screw rod 10 close to the center of the rolling inner ring 3 is fixedly connected with the pad 11; the distance between the adjusting screw rod 10 and the center of the center frame is adjusted by rotating the adjusting screw rod 10, the workpiece is fixedly supported, the displacement of the workpiece is avoided, and the overall quality of the product is improved. ​

[0032] The working principle of the embodiment: by placing the workpiece into the rolling inner ring 3, the position of the rolling bearing 5 is adjusted by adjusting the adjustable bearing seat 4, which helps to quickly coincide the rolling inner ring 3 on the center frame with the center of the machine tool spindle, so that the workpiece is quickly positioned, and through the cooperation of the locking nut 62, the floating nut 63 and the adjusting nut 64, the adjustable bearing seat 4 is stably installed, so that the rolling bearing 5 is stably supported in four-point mode, avoiding the deviation of the rolling inner ring 3 during operation, and further avoiding the displacement of the workpiece caused by shaking, so as to improve the product quality, convenient operation, time and labor saving.

[0033] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made under the concept of the utility model, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A new and improved four-point lathe center rest characterized by: The base (1) is provided with the fixed outer ring (2), the inner ring of the fixed outer ring (2) is provided with the rolling inner ring (3), and the outer ring of the fixed outer ring (2) is provided with the adjustable bearing seat (4); the adjustable bearing seat (4) is provided with the rolling bearing (5), the rolling bearing (5) is in abutment with the outer ring of the rolling inner ring (3), the adjustable bearing seat (4) is provided with the locking mechanism (6), and the locking mechanism (6) is used for locking the adjustable bearing seat (4) on the fixed outer ring (2).

2. A new and improved four-point lathe center rest as defined in claim 1, characterized in that: The adjustable bearing seat (4) is provided with four adjustable bearing seats (4), and the four adjustable bearing seats (4) are distributed at equal intervals along the outer ring of the fixed outer ring (2).

3. A new and improved four-point lathe center rest as defined in claim 1, characterized in that: The locking mechanism (6) comprises a fixed screw rod (61), a locking nut (62), a floating nut (63) and an adjusting nut (64), the fixed screw rod (61) is threaded through the adjustable bearing seat (4) and is threadedly connected to the fixed outer ring (2), the locking nut (62) is threadedly sleeved on the fixed screw rod (61) and abuts against the outer ring of the fixed outer ring (2), the floating nut (63) is sleeved on the fixed screw rod (61) and abuts against the upper end face of the adjustable bearing seat (4), and the adjusting nut (64) is sleeved on the fixed screw rod (61) and abuts against the floating nut (63).

4. A new and improved four-point lathe center rest as defined in claim 1, characterized in that: The fixed outer ring (2) is composed of an upper outer ring (21) and a lower outer ring (22), one end of the upper outer ring (21) and the lower outer ring (22) is rotatably connected through the rotating shaft (8), and the other end of the upper outer ring (21) and the lower outer ring (22) is connected through the fixed bolt (7).

5. A new and improved four-point lathe center rest as defined in claim 1, wherein: The side surface of the rolling inner ring (3) is fixedly connected with a plurality of sleeves (9), the adjusting screw rod (10) is threaded through the sleeve (9), the adjusting screw rod (10) is directed to the center of the rolling inner ring (3), and the end of the adjusting screw rod (10) close to the center of the rolling inner ring (3) is fixedly connected with the pad (11).

6. A new and improved four-point lathe center rest as defined in claim 1, wherein: The fixed outer ring (2) is provided with the oil hole (12).

7. A new and improved four-point lathe center rest as defined in claim 1, wherein: The fixed outer ring (2) is provided with the lifting bolt (13).

8. A new and improved four-point lathe center rest as defined in claim 1, wherein: The outer ring of the rolling inner ring (3) is provided with the guide rail in the circumferential direction, and the rolling bearing (5) is in abutment and mounted on the guide rail.

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