阅读说明：本技术 一种用于数控机床的丝杆预拉伸机构 (Screw rod pre-stretching mechanism for numerical control machine tool ) 是由 刘业成 于 2019-11-18 设计创作，主要内容包括：本发明公开了一种用于数控机床的丝杆预拉伸机构,包括电机座、丝杆以及轴承座；本发明通过将丝杆外围两端通过第一固定螺母、第二固定螺母和第三固定螺母分别与电机座和轴承座通过电机座盖、电机座衬套、第一轴承、第二轴承、第一轴承座衬套、第二轴承座衬套、第三轴承以及第四轴承实施连接定位,从而使得丝杆在实施预拉伸时能够更好的实现丝杆的预拉伸效果,且可保证丝杆在运行中的稳定性使得加工工件的精度得以有效的获取保证,同时不仅可以增加现有轴承的使用寿命,而且也保障了丝杆的使用寿命从而极大的减少了大量的量产成本并有效的提高了生产的效率,进而实现更加合理化的丝杆预拉伸结构以弥补现有技术中的不足。(The invention discloses a screw rod pre-stretching mechanism for a numerical control machine tool, which comprises a motor base, a screw rod and a bearing seat, wherein the motor base is provided with a motor shaft; according to the invention, two ends of the periphery of the screw rod are respectively connected and positioned with the motor base and the bearing seat through the motor base cover, the motor base bushing, the first bearing, the second bearing, the first bearing base bushing, the second bearing base bushing, the third bearing and the fourth bearing through the first fixing nut, the second fixing nut and the third fixing nut, so that the pre-stretching effect of the screw rod can be better realized when the pre-stretching is carried out on the screw rod, the stability of the screw rod in the operation can be ensured, the precision of a processed workpiece can be effectively ensured, meanwhile, the service life of the existing bearing can be prolonged, the service life of the screw rod is also ensured, a large amount of mass production cost is greatly reduced, the production efficiency is effectively improved, and a more reasonable screw rod pre-stretching structure is further realized to make up for the defects in the prior art.)

1. A lead screw pretension mechanism for a numerical control machine tool, characterized by comprising:

a motor base (1);

a screw rod (7); and

a bearing seat (10);

the motor base cover (3) is fixedly connected to one side of the middle of the upper surface of the motor base (1) through bolts, a screw rod (7) is inserted into the motor base cover (3), one end of the periphery of the screw rod (7) penetrates through the motor base cover (3) and is connected with a first fixing nut (2) in a threaded mode, one side of the middle of the upper surface of the bearing base (10) is fixedly connected with a bearing base cover (13) through bolts, the interior of the bearing base cover (13) is inserted into the screw rod (7), and the other end of the periphery of the screw rod (7) penetrates through the bearing base cover (13) and is connected with a third fixing nut (15) in a;

wherein, screw thread is opened on one side of the periphery of the screw rod (7), and the screw thread and the periphery of the screw rod (7) are in the same direction.

2. The screw rod pretensioning mechanism for the numerical control machine according to claim 1, characterized in that: the motor base cover (3) further comprises:

a motor base bushing (4);

the inner wall of the motor base cover (3) is fixedly connected with a motor base bushing (4) through a clamping piece and a bolt, and the inside of the motor base bushing (4) is sleeved with the screw rod (7).

3. The screw rod pretensioning mechanism for the numerical control machine according to claim 2, characterized in that: the motor cabinet (1) further comprises:

a first bearing (5);

wherein, motor cabinet (1) upper surface middle part one side is close to the edge and passes through fastener and bolt fixedly connected with first bearing (5), first bearing (5) inner wall with lead screw (7) cup joint, first bearing (5) are used for as lead screw (7) positioning mechanism on motor cabinet (1).

4. The screw rod pretensioning mechanism for the numerical control machine according to claim 3, characterized in that: the motor cabinet (1) further comprises:

a second bearing (6);

the motor base is characterized in that the upper surface of the motor base (1) on one side of the first bearing (5) is fixedly connected with a second bearing (6) through a bolt and a clamping piece, the inner wall of the second bearing (6) is sleeved with the screw rod (7), and the second bearing (6) is used as a limiting mechanism of the screw rod (7) on the motor base (1).

5. The screw rod pretensioning mechanism for the numerical control machine according to claim 4, characterized in that: the bearing seat (10) further comprises:

a second fixing nut (8);

and a second fixing nut (8) is sleeved on the periphery of the screw rod (7) on one side of the bearing seat (10) in a threaded manner, and the second fixing nut (8) is used as a positioning mechanism of the screw rod (7) in the bearing seat (10).

6. The screw rod pretensioning mechanism for the numerical control machine according to claim 5, characterized in that: the bearing seat (10) further comprises:

a first bearing block bushing (9);

one side of the middle part of the upper surface of the bearing seat (10) is fixedly connected with a first bearing seat lining (9) through a bolt and a clamping piece, and the inner wall of the first bearing seat lining (9) is sleeved with the screw rod (7).

7. The screw rod pretensioning mechanism for the numerical control machine according to claim 6, characterized in that: the bearing seat (10) further comprises:

a third bearing (11);

the other side of the middle part of the upper surface of the bearing seat (10) is fixedly connected with a third bearing (11) through a bolt and a clamping piece, the inner wall of the third bearing (11) is sleeved with the screw rod (7), and the third bearing (11) is used as a positioning mechanism of the screw rod (7) on the bearing seat (10).

8. The screw rod pretensioning mechanism for the numerical control machine according to claim 7, characterized in that: the bearing seat (10) further comprises:

a fourth bearing (12);

the upper surface of the bearing seat (10) on one side of the third bearing (11) is fixedly connected with a fourth bearing (12) through a bolt and a clamping piece, the fourth bearing (12) is sleeved with the screw rod (7), and the fourth bearing (12) is used as a limiting mechanism of the screw rod (7) on the bearing seat (10).

9. The screw rod pretensioning mechanism for the numerical control machine according to claim 8, characterized in that: the bearing seat (10) further comprises:

a second bearing block bushing (14);

the edge of one side of the middle of the upper surface of the bearing seat (10) is fixedly connected with a second bearing seat lining (14) through a bolt, and the inner wall of the second bearing seat lining (14) is sleeved with the screw rod (7).

10. The screw rod pretensioning mechanism for the numerical control machine according to claim 1, characterized in that: motor cabinet (1) and bearing frame (10) upper surface one side all through bolt fixedly connected with connecting piece, and between two connecting pieces one side and motor cabinet (1) and bearing frame (10) through fastener fixedly connected with elongate the bolster, and elongate the bolster both sides middle part all through the tensile canceling release mechanical system of bolt fixedly connected with, elongate the bolster with tensile canceling release mechanical system middle part all with lead screw (7) threaded connection.

Technical Field

The invention relates to the technical field of pre-stretching mechanisms, in particular to a screw rod pre-stretching mechanism for a numerical control machine tool.

Background

The ball screw is the most commonly used transmission element on the tool machinery and precision machinery, its main function is to convert the rotary motion into linear motion, or convert the torque into the axial repeated acting force, and has the characteristics of high precision, reversibility and high efficiency, because of the very small frictional resistance, the ball screw is widely used in various industrial equipments and precision instruments, the numerical control machine is a short name of the numerical control machine, it is an automatic machine equipped with a program control system, the control system can logically process the program with control code or other symbol instruction, and decode it, and express it with coded number, input it into the numerical control device through the information carrier, the numerical control device sends out various control signals through the operation process, controls the action of the machine, according to the shape and size required by the drawing, automatically processes the parts, the prestretching structure of the screw rod is used for the numerical control machine in the processing operation, the precision of the processed workpiece plays a crucial role, and the pretensioning mechanism for the screw rod in the prior art has certain defects in practical application, such as:

Disclosure of Invention

The invention aims to provide a screw rod pre-stretching mechanism for a numerical control machine tool, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a lead screw prestretching mechanism for digit control machine tool, includes motor cabinet, lead screw and bearing frame, there is the motor seat lid motor cabinet middle part one side through bolt fixedly connected with, the inside lead screw that pegs graft of motor cabinet lid, the peripheral one end of lead screw runs through motor cabinet lid threaded connection and has first fixation nut, there is the bearing cabinet lid bearing frame upper surface middle part one side through bolt fixedly connected with, inside the bearing cabinet lid with the lead screw pegs graft, the peripheral other end of lead screw runs through bearing cabinet lid threaded connection and has the third fixation nut, screw thread has been seted up to peripheral one side of lead screw, and the screw thread with the lead screw periphery is the syntropy.

Preferably, the motor base cover further comprises a motor base lining, the inner wall of the motor base cover is fixedly connected with the motor base lining through a clamping piece and a bolt, and the inside of the motor base lining is sleeved with the screw rod.

Preferably, the motor cabinet still includes first bearing, motor cabinet upper surface middle part one side is close to the edge and passes through fastener and the first bearing of bolt fixedly connected with, first bearing inner wall with the lead screw cup joints, first bearing is used for as the positioning mechanism of lead screw on the motor cabinet.

Preferably, the motor cabinet further comprises a second bearing, the upper surface of the motor cabinet on one side of the first bearing is fixedly connected with the second bearing through a bolt and a clamping piece, the inner wall of the second bearing is sleeved with the screw rod, and the second bearing is used as a limiting mechanism of the screw rod on the motor cabinet.

Preferably, the bearing seat further comprises a second fixing nut, the second fixing nut is sleeved on the peripheral thread of the screw rod on one side of the bearing seat, and the second fixing nut is used as a positioning mechanism of the screw rod in the bearing seat.

Preferably, the bearing seat further comprises a first bearing seat lining, one side of the middle part of the upper surface of the bearing seat is fixedly connected with the first bearing seat lining through a bolt and a clamping piece, and the inner wall of the first bearing seat lining is sleeved with the screw rod.

Preferably, the bearing frame still includes the third bearing, bearing frame upper surface middle part opposite side is through bolt and fastener fixedly connected with third bearing, the third bearing inner wall with the lead screw cup joints, the third bearing is used for as the positioning mechanism of lead screw on the bearing frame.

Preferably, the bearing frame still includes the fourth bearing, third bearing one side the bearing frame upper surface is through bolt and fastener fixedly connected with fourth bearing, the fourth bearing with the lead screw cup joints, the fourth bearing is used for being as the stop gear of lead screw on the bearing frame.

Preferably, the bearing seat further comprises a second bearing seat bushing, the edge of one side of the middle part of the upper surface of the bearing seat is fixedly connected with the second bearing seat bushing through a bolt, and the inner wall of the second bearing seat bushing is sleeved with the screw rod.

Preferably, all through bolt fixedly connected with connecting piece on one side of motor cabinet and bearing frame upper surface, and stretch the bolster through fastener fixedly connected with between two connecting piece one sides and motor cabinet and the bearing frame, and stretch the bolster both sides middle part and all through the tensile canceling release mechanical system of bolt fixedly connected with, stretch the bolster with tensile canceling release mechanical system middle part all with lead screw threaded connection.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, two ends of the periphery of the screw rod are respectively connected and positioned with the motor base and the bearing seat through the motor base cover, the motor base bushing, the first bearing, the second bearing, the first bearing base bushing, the second bearing base bushing, the third bearing and the fourth bearing through the first fixing nut, the second fixing nut and the third fixing nut, so that the pre-stretching effect of the screw rod can be better realized when the pre-stretching is carried out on the screw rod, the stability of the screw rod in the operation can be ensured, the precision of a processed workpiece can be effectively ensured, meanwhile, the service life of the existing bearing can be prolonged, the service life of the screw rod is also ensured, a large amount of mass production cost is greatly reduced, the production efficiency is effectively improved, and a more reasonable screw rod pre-stretching structure is further realized to make up for the defects in the prior art.

Drawings

FIG. 1 is a schematic top view of a half-section of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 3 is an enlarged schematic view of B in fig. 1.

In the figure: 1-a motor base; 2-a first fixing nut; 3-motor seat cover; 4-motor base bushing; 5-a first bearing; 6-a second bearing; 7-a screw rod; 8-a second fixing nut; 9-a first bearing block bushing; 10-a bearing seat; 11-a third bearing; 12-a fourth bearing; 13-a bearing block cover; 14-a second bearing block bushing; 15-third fixing nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.