CN219336963U

CN219336963U - Screw rod bearing mechanism

Info

Publication number: CN219336963U
Application number: CN202320270111.9U
Authority: CN
Inventors: 祝烽; 刘金山
Original assignee: Guangdong Harvest Star Technology Co ltd
Current assignee: Guangdong Harvest Star Technology Co ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-07-14
Anticipated expiration: 2033-02-21

Abstract

The utility model relates to the technical field of bearing mechanisms and discloses a screw rod bearing mechanism, which comprises a bearing seat, wherein a bearing mounting hole for mounting a bearing, an oil seal mounting hole for mounting a first oil seal and a screw rod mounting hole for mounting a screw rod are sequentially formed in the bearing seat along a preset first direction; the bearing mounting hole, the oil seal mounting hole and the screw rod mounting hole are coaxial round holes, the inner diameter of the bearing mounting hole is larger than that of the oil seal mounting hole, and the inner diameter of the oil seal mounting hole is larger than that of the screw rod mounting hole. The utility model mainly solves the technical problem that the machining efficiency is reduced due to the fact that the existing bearing seat needs to be clamped and machined for many times.

Description

Screw rod bearing mechanism

Technical Field

The utility model relates to the technical field of bearing mechanisms, in particular to a screw rod bearing mechanism.

Background

The feeding transmission device of the conventional numerical control machine tool is realized in a lead screw transmission mode, and bearing seats are needed at two ends of the lead screw to support the lead screw, so that the precision of the machine tool can be directly influenced by the design of the bearing seats; in addition, the tightness of the bearing seat is also important, and during the machining operation process of the machine, cutting fluid leaks onto the screw rod, and the cutting fluid leaks into the screw rod supporting bearing along the screw rod, so that grease failure of the screw rod supporting bearing can be directly caused, the failure rate of the machine is increased, and the phenomenon is particularly obvious on a feeding device in the vertical direction.

In order to prevent cutting fluid from entering into a bearing, the traditional screw rod bearing device is often provided with an oil seal at the front end of a bearing seat, and the mounting hole of the oil seal and the mounting hole of the bearing are often designed at two ends of the bearing seat. Therefore, the processing equipment of the part has high requirements, the processing cost is high, and the processing efficiency of the product is relatively low. The bearing mechanism convenient to process is an urgent problem to be solved.

Disclosure of Invention

The embodiment of the utility model discloses a screw rod bearing mechanism which is used for solving the technical problem that the machining efficiency is reduced due to the fact that an existing bearing seat needs to be clamped and machined for multiple times.

To achieve the purpose, the utility model adopts the following technical scheme:

a lead screw bearing mechanism comprising:

the bearing seat is internally provided with a bearing mounting hole for mounting a bearing, an oil seal mounting hole for mounting a first oil seal and a screw rod mounting hole for mounting a screw rod in sequence along a preset first direction; the bearing mounting hole, the oil seal mounting hole and the screw rod mounting hole are coaxial round holes, the inner diameter of the bearing mounting hole is larger than that of the oil seal mounting hole, and the inner diameter of the oil seal mounting hole is larger than that of the screw rod mounting hole.

In one example, a first limiting step is formed at the intersection of the bearing mounting hole and the oil seal mounting hole, and a second limiting step is formed at the intersection of the oil seal mounting hole and the screw rod mounting hole;

the first limiting step comprises a first mounting surface which is connected with the inner wall of the bearing mounting hole, and the first mounting surface is used for abutting one end of the bearing; the second limiting step comprises a second mounting surface which is connected with the inner wall of the oil seal mounting hole, and the second mounting surface is used for being abutted against one end of the first oil seal.

In one example, the first oil seal comprises an inner ring used for abutting against the outer wall of the screw rod and an outer ring which is arranged around the inner ring and used for abutting against the inner wall of the oil seal mounting hole, and the inner ring is fixedly connected with the outer ring.

In one example, a first gap region for accommodating grease is formed between one end of the bearing and the other end of the first oil seal.

In one example, one end of the bearing mounting hole away from the oil seal mounting hole is abutted with a bearing gland, and the bearing gland is abutted with the other end of the bearing.

In one example, a second oil seal is provided in the bearing cover for sealing the bearing.

In one example, a second gap region for accommodating grease is formed between the second oil seal and the other end of the bearing.

In one example, a spacer is further arranged between the second oil seal and the screw rod, and a lock nut is arranged at the other end, far away from the bearing, of the spacer.

In one example, a baffle is arranged at one end of the screw rod mounting hole away from the oil seal mounting hole in a sealing manner.

Compared with the prior art, the screw rod bearing mechanism provided by the utility model has at least the following beneficial effects:

the bearing mounting hole, the oil seal mounting hole and the screw rod mounting hole of the bearing seat are arranged on the same side, the bearing seat can be machined through one-time clamping, machining accuracy can be guaranteed, machining efficiency of the bearing seat can be effectively improved, and machining cost is low.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a cross-sectional view of a screw bearing mechanism of the present utility model;

fig. 2 is a schematic diagram of the working state of the screw rod bearing mechanism for clamping the screw rod.

Illustration of:

1. a bearing seat; 11. bearing mounting holes; 111. a first mounting surface; 12. an oil seal mounting hole; 121. a second mounting surface; 13. a screw rod mounting hole; 14. a first gap region; 15. a second gap region; 2. a bearing; 3. a first oil seal; 4. a second oil seal; 5. a spacer bush; 6. a bearing gland; 7. a lock nut; 8. a screw rod; 9. and a baffle.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate the description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

Referring to fig. 1, the present embodiment provides a screw rod bearing mechanism, which includes a bearing seat 1, a bearing 2, a first oil seal 3, a second oil seal 4, a spacer 5, a bearing gland 6 and a lock nut 7.

The bearing seat 1 is internally provided with a bearing mounting hole 11 for mounting a bearing 2, an oil seal mounting hole 12 for mounting a first oil seal 3 and a screw rod mounting hole 13 for mounting a screw rod 8 in sequence along a preset first direction; wherein, bearing mounting hole 11, oil blanket mounting hole 12 and lead screw mounting hole 13 are coaxial round hole, and the internal diameter of bearing mounting hole 11 is greater than the internal diameter of oil blanket mounting hole 12, and the internal diameter of oil blanket mounting hole 12 is greater than the internal diameter of lead screw mounting hole 13. The bearing mounting holes 11, the oil seal mounting holes 12 and the screw rod mounting holes 13 are arranged in the bearing seat 1 in a stepped manner, so that the bearing seat 1 is convenient to clamp and process and mold for one time.

The intersection of the bearing mounting hole 11 and the oil seal mounting hole 12 is provided with a first limiting step, and the intersection of the oil seal mounting hole 12 and the screw rod mounting hole 13 is provided with a second limiting step; the first limiting step comprises a first mounting surface 111 which is engaged with the inner wall of the bearing mounting hole 11, and the first mounting surface 111 is used for abutting one end of the bearing 2; the second limiting step comprises a second mounting surface 121 which is engaged with the inner wall of the oil seal mounting hole 12, and the second mounting surface 121 is used for abutting against one end of the first oil seal 3. The first oil seal 3 is used for preventing cutting fluid on the screw rod 8 from entering the bearing 2. Preferably, the first oil seal 3 is annular, the first oil seal 3 comprises an inner ring for abutting against the outer wall of the screw rod 8 and an outer ring which is arranged around the inner ring and used for abutting against the inner wall of the oil seal mounting hole 12, and the inner ring is fixedly connected with the outer ring.

Wherein, be formed with the first clearance district 14 that is used for holding grease between the one end of bearing 2 and the other end of first oil blanket 3 to prevent that waste liquid such as cutting fluid from also permeating into inside bearing 2 through first oil blanket 3, this first clearance district 14 has further guaranteed the leakproofness of this bearing 2 mechanism as the buffer, thereby can promote lathe feed arrangement's stability greatly, can make the lathe equipment keep the operation under the high accuracy for a long time.

In order to lock the screw rod bearing mechanism, one end of the bearing mounting hole 11 away from the oil seal mounting hole 12 is abutted with the bearing cover 6, and the bearing cover 6 is abutted with the other end of the bearing 2. In order to ensure tightness at the end of the bearing cap 6, a second oil seal 4 for sealing the bearing 2 is provided in the bearing cap 6. Preferably, the second oil seal 4 is annular, and the second oil seal 4 comprises an outer ring for abutting against the inner wall of the bearing gland 6 and an inner ring which is arranged around the outer ring and is used for abutting against the screw rod 8, and the inner ring is fixedly connected with the outer ring. Still further still be provided with spacer 5 between second oil blanket 4 and the lead screw 8, the other end that spacer 5 kept away from bearing 2 is provided with lock nut 7, and lock nut 7 is used for locking lead screw bearing mechanism, and spacer 5 is used for carrying out the spacing to lock nut 7's locking degree of depth.

Wherein, a second gap area 15 for accommodating grease is formed between the second oil seal 4 and the other end of the bearing 2, so as to prevent waste liquid such as cutting fluid from entering the bearing 2 through the second oil seal 4.

Wherein, baffle 9 that is used for sealed is installed to the one end that lead screw mounting hole 13 kept away from oil blanket mounting hole 12, and baffle 9 is used for the butt lead screw 8 to prevent waste liquid such as cutting fluid from entering into the region before the first oil blanket 3 from the opening of lead screw mounting hole 13. By arranging multiple sealing structures, the tightness of the screw rod bearing mechanism is ensured.

The foregoing description of the preferred embodiments of the present utility model has been provided for the purpose of illustrating the general principles of the present utility model and is not to be construed as limiting the scope of the utility model in any way. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model, and other embodiments of the present utility model as will occur to those skilled in the art without the exercise of inventive faculty, are intended to be included within the scope of the present utility model.

Claims

1. A lead screw bearing mechanism, comprising: the bearing seat (1), a bearing mounting hole (11) for mounting the bearing (2), an oil seal mounting hole (12) for mounting the first oil seal (3) and a screw rod mounting hole (13) for mounting the screw rod (8) are sequentially formed in the bearing seat (1) along a preset first direction; the bearing mounting hole (11), the oil seal mounting hole (12) and the screw rod mounting hole (13) are coaxial round holes, the inner diameter of the bearing mounting hole (11) is larger than that of the oil seal mounting hole (12), and the inner diameter of the oil seal mounting hole (12) is larger than that of the screw rod mounting hole (13).

2. Screw bearing mechanism according to claim 1, characterized in that a first limit step is formed at the intersection of the bearing mounting hole (11) and the oil seal mounting hole (12), and a second limit step is formed at the intersection of the oil seal mounting hole (12) and the screw mounting hole (13);

the first limiting step comprises a first mounting surface (111) which is connected with the inner wall of the bearing mounting hole (11), and the first mounting surface (111) is used for abutting one end of the bearing (2); the second limiting step comprises a second mounting surface (121) which is connected with the inner wall of the oil seal mounting hole (12), and the second mounting surface (121) is used for abutting one end of the first oil seal (3).

3. Screw bearing mechanism according to claim 2, characterized in that the first oil seal (3) comprises an inner ring for abutting against the outer wall of the screw (8) and an outer ring arranged around the inner ring for abutting against the inner wall of the oil seal mounting hole (12), the inner ring being fixedly connected with the outer ring.

4. A screw bearing mechanism according to claim 3, characterized in that a first clearance area (14) for accommodating grease is formed between one end of the bearing (2) and the other end of the first oil seal (3).

5. Screw bearing mechanism according to claim 2, characterized in that the end of the bearing mounting hole (11) remote from the oil seal mounting hole (12) is in abutment with a bearing cover (6), the bearing cover (6) being in abutment with the other end of the bearing (2).

6. Screw bearing mechanism according to claim 5, characterized in that a second oil seal (4) for sealing the bearing (2) is provided in the bearing gland (6).

7. Screw bearing mechanism according to claim 6, characterized in that a second gap area (15) for accommodating grease is formed between the second oil seal (4) and the other end of the bearing (2).

8. Screw rod bearing mechanism according to claim 6, characterized in that a spacer (5) is further arranged between the second oil seal (4) and the screw rod (8), and the other end of the spacer (5) away from the bearing (2) is provided with a lock nut (7).

9. Screw bearing mechanism according to claim 1, characterized in that the end of the screw mounting hole (13) remote from the oil seal mounting hole (12) is provided with a baffle (9) in a sealing manner.