Bearing spacer ring structure for solving elongation of screw

Abstract

The utility model discloses a bearing spacer ring structure for solving the problem of screw elongation, which comprises a screw, a first end and a second end of the screw are respectively and fixedly sleeved with a bearing, and first spacer rings are respectively arranged on the end surfaces of two ends of the bearing at the first end; a polyurethane spacer ring is embedded in the end face of the second spacer ring, and the end face of the polyurethane spacer ring and the end face of the second spacer ring are attached to the end face of the end, facing the screw rod, of the bearing located at the second end. The characteristics of nylon, polyurethane elastomer and disc springs are utilized, so that the heating time of a machine tool is shortened, buffering is provided for thermal elongation of a screw during machining, a bearing is protected, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision machinery, in particular to a bearing spacer ring structure for solving the elongation of a screw rod. Background Art

[0002] During the operation of the machine tool, the reciprocating motion of the screw will generate a large amount of heat, causing the screw to thermally elongate. The gap reserved at the tail end seat will cause the screw to elongate to one side, greatly affecting the accuracy of the machine tool. Utility Model Content

[0003] The utility model aims to provide a bearing spacer ring structure for solving the elongation of a screw rod, and solves the precision error caused by the thermal elongation of a screw rod in the frequent high-speed movement of a high-precision instrument.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a bearing spacer ring structure for solving the elongation of a screw, comprising a screw, wherein the first end and the second end of the screw are respectively fixedly sleeved with bearings, wherein:

[0005] First spacer rings are respectively arranged on the end surfaces of both ends of the bearing located at the first end;

[0006] It also includes a second spacer ring with a urea spacer ring inlaid on the end surface, and the end surfaces of the urea spacer ring and the second spacer ring are both in contact with the end surface of the bearing located at the second end facing the end of the screw.

[0007] Preferably, it further comprises a transmission seat, wherein the transmission seat is sleeved on the first end of the screw rod, and one of the first spacer rings is located in a mounting seat provided on the transmission seat.

[0008] Preferably, a first end sleeve of the screw rod located in the transmission seat is provided with a first pressure cover, and the first pressure cover is squeezed by a first locking nut threadedly connected to the screw rod to cause the two first spacer rings to be compressed and deformed.

[0009] Preferably, an oil sealing ring is sleeved on the outer wall of the first spacer ring.

[0010] Preferably, it further comprises a tail end seat, wherein the tail end seat is sleeved on the second end of the screw rod;

[0011] A second pressure cover that abuts against the bearing end surface is inserted on the second end of the screw rod, a disc spring sleeved on the second end is placed in the second pressure cover, and a second locking nut is threadedly connected to the second end to fix the disc spring.

[0012] In the above technical scheme, the utility model provides a bearing spacer ring structure for solving the elongation of the screw, which has the following beneficial effects: the bearing on the tail end seat is fixed by the tail end seat and the second pressure cover; the inner side of the bearing is supported by the second spacer ring, and a PU rubber spacer ring is installed on the second spacer ring, and the bearing is supported by the rigidity of the PU rubber, and the screw is blocked by a disc spring on the other side of the bearing. Utilizing the rigidity of PU rubber as a plastic, the bearing and the PU rubber spacer ring are blocked and lightly pre-tensioned, so that the screw forms a blocking structure with the PU rubber spacer ring at room temperature. When the screw moves at high speed, a large amount of heat is generated, which will cause the screw to thermally elongate. At this time, the elasticity of the PU rubber spacer ring is used to fill the reserved gap until it finally hits the second spacer ring, thereby suppressing the screw from infinitely thermally elongating to one side and affecting the accuracy of the machine tool. When the second spacer ring completely supports the bearing, the PU rubber spacer ring plays a role in collecting the axial force and protecting the bearing. The disc spring installed at the tail end seat to lock the second locking nut can not only prevent loosening, but also play a strong buffering role when the screw is thermally expanded, thereby protecting the bearing and increasing the life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0014] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0015] Figure 2 A schematic cross-sectional structure diagram of a screw rod and a transmission seat provided in an embodiment of the utility model;

[0016] Figure 3 A schematic cross-sectional structure diagram of a screw rod and a tail end seat provided in an embodiment of the utility model.

[0017] Description of reference numerals:

[0018] 1. Transmission seat; 2. First pressure cover; 3. First pressure cover; 4. Bearing; 5. Screw; 12. Second spacer ring; 14. Oil seal ring; 15. First spacer ring; 7. Second locking nut; 8. Tail end seat; 10. Disc spring. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] like Figure 1-3As shown, a bearing spacer ring structure for solving the elongation of a screw includes a screw 5, characterized in that a first end and a second end of the screw 5 are respectively fixedly sleeved with bearings 4, wherein:

[0021] First spacer rings 15 are respectively provided on the end surfaces of both ends of the bearing 4 at the first end;

[0022] It also includes a second spacer ring 12 with a urea spacer ring 11 inlaid on the end surface. The end surfaces of the urea spacer ring 11 and the second spacer ring 12 are both in contact with the end surface of the bearing 4 at the second end facing the screw 5.

[0023] Specific:

[0024] Combination Figure 2 As shown, the transmission seat 1 is sleeved on the first end of the screw rod 5, and one of the first spacer rings 15 is located in the mounting seat 13 provided on the transmission seat 1. The first end of the screw rod 5 located in the transmission seat 1 is sleeved with a first gland 3, and the first gland 3 is squeezed by the first locking nut 2 threadedly connected to the screw rod 5 to make the two first spacer rings 15 deform under pressure. Secondly, the outer wall of the first spacer ring 15 is sleeved with an oil seal ring 14. The first spacer ring 15 and the oil seal ring 14 are used to ensure that the lubricating oil is located between the two first spacer rings 15, so as to provide lubrication for the bearing 4.

[0025] Combination Figure 3 As shown, the bearing 4 on the tail end seat 8 is fixed by the tail end seat 8 and the second pressure cover 9; the inner side of the bearing 4 is supported by the second spacer ring 12 to support the screw 5, and the urethane spacer ring 11 is installed on the second spacer ring 12, and the bearing 4 is supported by the rigidity of the urethane, and the screw 5 is blocked by the disc spring 10 on the other side of the bearing 4. Taking advantage of the rigidity of the urethane, the bearing 4 and the urethane spacer ring 11 are blocked and lightly pre-tensioned, so that the screw 5 forms a blocking structure with the urethane spacer ring 11 at room temperature. When the screw 5 moves at high speed, a large amount of heat is generated, which will cause the screw 5 to thermally elongate. At this time, the elasticity of the urethane spacer ring 11 is used to fill the reserved gap until it finally reaches the second spacer ring 12, so as to suppress the screw 5 from infinitely extending to one side and affecting the accuracy of the machine tool. When the second spacer ring 12 completely supports the bearing, the urethane spacer ring 11 plays the role of collecting the axial force and protecting the bearing. The disc spring 10 is installed on the tail end seat 8 to lock the second locking nut 7, which can not only ensure the anti-loosening problem, but also play a strong buffering role when the screw 5 is thermally elongated, thereby protecting the bearing and increasing the life of the bearing 4.

[0026] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A bearing spacer ring structure for solving the elongation of a screw, comprising a screw (5), characterized in that: The first end and the second end of the screw rod (5) are respectively fixedly sleeved with bearings (4), wherein: First spacer rings (15) are respectively arranged on the end surfaces of both ends of the bearing (4) located at the first end; It also includes a second spacer ring (12) with a urea spacer ring (11) embedded on the end surface, and the end surfaces of the urea spacer ring (11) and the second spacer ring (12) are both in contact with the end surface of the bearing (4) located at the second end of the screw (5) facing the end of the screw (5).

2. A bearing spacer ring structure for solving the problem of screw elongation according to claim 1, characterized in that: It also comprises a transmission seat (1), wherein the transmission seat (1) is sleeved on the first end of the screw rod (5), and one of the first spacer rings (15) is located in a mounting seat (13) provided on the transmission seat (1).

3. A bearing spacer ring structure for solving the problem of screw elongation according to claim 2, characterized in that: The first end of the screw rod (5) located in the transmission seat (1) is sleeved with a first pressure cover (3), and the first pressure cover (3) is squeezed by a first locking nut (2) threadedly connected to the screw rod (5) to cause the two first spacer rings (15) to be compressed and deformed.

4. A bearing spacer ring structure for solving the problem of screw elongation according to claim 2, characterized in that: An oil sealing ring (14) is sleeved on the outer wall of the first spacer ring (15).

5. A bearing spacer ring structure for solving the problem of screw elongation according to claim 1, characterized in that: It also includes a tail end seat (8), wherein the tail end seat (8) is sleeved on the second end of the screw rod (5); A second pressure cover (9) is inserted into the second end of the screw rod (5) and abuts against the end surface of the bearing (4). A disc spring (10) is placed inside the second pressure cover (9) and is sleeved on the second end. A second locking nut (7) is threadedly connected to the second end to fix the disc spring (10).

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