Oil-proof structure of slide bar and shaft sleeve

Abstract

The utility model provides an oil -proof structure of slide bar and axle sleeve belongs to sewing machine technical field. It solved the problem that the lubricating oil between the existing slide bar and axle sleeve can be thrown out. The oil -proof structure of slide bar and axle sleeve, axle sleeve is cylindrical, slide bar is round bar and is worn in the axle sleeve, the front end of slide bar is worn from the front end of axle sleeve, the oil -proof structure includes the oil -absorbing oil -cotton of circular ring and the oil guide plate fixed with the axle sleeve, the oil -cotton cover is set in the outside of slide bar front end and is matched with the clearance of slide bar, the one end of oil -cotton towards axle sleeve is attached with the front end surface of axle sleeve, the oil -guide plate includes the ring -shaped cover and the oil -guide part of strip -shaped, the cover of set -up part is set up in the outside of slide bar front end, the oil -guide part is connected to the cover set -up part downside vertically, the oil -cotton is located between cover set -up part and axle sleeve front end part and cover set -up part and oil -cotton are attached. The oil -proof structure of slide bar and axle sleeve has the advantage that lubricating oil is convenient for repeated use.

Description

Technical Field

[0001] This utility model belongs to the field of sewing machine technology and relates to an oil-proof structure for slide rods and bushings. Background Technology

[0002] A sewing machine is a machine that uses one or more sewing threads to create one or more stitches on fabric, allowing one or more layers of fabric to interweave or sew together. It is the most commonly used equipment in the clothing industry.

[0003] Sewing machines typically use an electric motor as a power source, with power transmitted through rod-like structures such as transmission rods and connecting rods rotating or moving axially, thereby completing the relevant actions in the sewing process.

[0004] The sewing machine housing contains a horizontally mounted cylindrical bushing, through which a rod-shaped slide bar slides. During operation, the slide bar can move axially relative to the bushing. Inevitably, friction occurs between the slide bar and the bushing during this movement. To reduce wear and ensure smooth slide bar movement, lubricating oil is typically placed between them for lubrication.

[0005] However, when the slide bar moves outward axially relative to the bushing, it will carry the lubricating oil between the two outward. After being carried out of the bushing, the lubricating oil will be thrown outward under its own gravity or driven by the slide bar. This not only wastes the lubricating oil, but also contaminates the entire inner cavity of the sewing machine housing, making it inconvenient to clean. Utility Model Content

[0006] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing an oil-proof structure for the slide rod and bushing, thus solving the problem that the lubricating oil between the slide rod and bushing is thrown out.

[0007] The objective of this utility model can be achieved through the following technical solutions: An oil-proof structure for a sliding rod and a bushing, wherein the bushing is cylindrical and the sliding rod is cylindrical and passes through the bushing, with the front end of the sliding rod protruding from the front end of the bushing, characterized in that the oil-proof structure includes an annular oil-absorbing cotton and an oil guide plate fixed to the bushing, the oil-absorbing cotton being sleeved on the outside of the front end of the sliding rod and clearance-fitted with the sliding rod, the end of the oil-absorbing cotton facing the bushing abutting against the front end face of the bushing, the oil guide plate including an annular sleeve portion and an elongated oil guide portion, the sleeve portion being sleeved on the outside of the front end of the sliding rod, the oil guide portion being vertically connected to the lower side of the sleeve portion, and the oil-absorbing cotton being located between the sleeve portion and the front end of the bushing, with the sleeve portion abutting against the oil-absorbing cotton.

[0008] The oil-proof structure of this slide rod and bushing features an oil-absorbing cotton and an oil guide plate at the front end of the bushing. The annular oil-absorbing cotton and the annular sleeve are both fitted onto the outside of the slide rod, without affecting its axial movement. Simultaneously, the sleeve of the oil guide plate, fixed to the bushing, axially limits the oil-absorbing cotton at the front end of the bushing, preventing gaps between the oil-absorbing cotton and the bushing. When the slide rod moves forward axially relative to the bushing, the lubricating oil carried out is absorbed by the oil-absorbing cotton, preventing lubricating oil from splashing out and contaminating the inside of the sewing machine housing. The oil-absorbing cotton can be made of cotton or wool felt, etc. Once the oil-absorbing cotton is saturated with oil, the oil flows downwards along the sleeve that is in contact with the cotton and the elongated oil guide plate connected to the lower side of the sleeve to the desired location, such as an oil reservoir.

[0009] The oil-proof structure of this slide rod and bushing can absorb the lubricating oil carried out by the axial movement of the slide rod and guide it to the required position. This facilitates the reuse of lubricating oil, avoids waste, and prevents oil from splashing everywhere and contaminating the entire inner cavity of the housing, making it easy to clean the inner cavity of the housing.

[0010] In the aforementioned oil-proof structure of the slide rod and bushing, the inner diameter of the sleeve portion is larger than the inner diameter of the oil cotton. To ensure the stability of the connection, the sleeve portion can be made of materials such as plastic or metal with higher hardness than the oil cotton. The smaller inner diameter of the oil cotton minimizes the gap between it and the outer side of the slide rod, improving the oil absorption effect. The larger inner diameter of the sleeve portion avoids interference and friction on the movement of the slide rod, ensuring smooth movement of the slide rod while achieving the oil guiding effect.

[0011] In the aforementioned oil-proof structure of the slide bar and bushing, the horizontal width of the oil guide gradually decreases from top to bottom. This top-wide, bottom-narrow design allows for the centralized guidance and collection of the flowing oil, preventing it from spreading to other locations.

[0012] In the aforementioned oil-proof structure of the slide bar and bushing, the oil guide plate further includes a plate-shaped connecting part horizontally disposed on the upper side of the bushing. The connecting part is connected to the top of the sleeve portion, and the connecting part is fixed to the bushing by fasteners that vertically pass through the connecting part. The connecting part is connected to the upper side of the bushing, making the connection process visible and convenient to operate, and it does not divert oil overflowing downwards from the oil-soaked cotton.

[0013] In the aforementioned oil-proof structure of the slide rod and bushing, the top of the front end of the bushing has a horizontally set mounting plane, and the lower side of the connecting part abuts against the mounting plane. The mounting plane, as a plane, is fixed after abutting against the connecting part, ensuring the stability of the oil guide plate connection.

[0014] In the aforementioned oil-proof structure of the slide rod and bushing, a waist-shaped hole is provided vertically through the connecting part, and the length direction of the waist-shaped hole is consistent with the axial direction of the bushing. The waist-shaped hole allows the oil guide plate to better fit the oil cotton during installation, thus achieving oil guidance.

[0015] Compared with existing technologies, the oil-proof structure of this slide rod and bushing can absorb and guide the lubricating oil brought out by the axial movement of the slide rod to the required position, which facilitates the reuse of lubricating oil, avoids waste, and prevents oil from splashing everywhere and contaminating the entire inner cavity of the housing, making it easier to clean the inner cavity of the housing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the oil-proof structure of the slide rod and bushing.

[0017] Figure 2 This is a schematic diagram of the oil guide plate in the oil-proof structure of the slide rod and bushing.

[0018] In the figure, 1 is the bushing; 1a is the mounting plane; 2 is the slide rod; 3 is the oil cotton; 4 is the oil guide plate; 4a is the sleeve part; 4b is the oil guide part; 4c is the connecting part; and 4d is the oblong hole. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 and Figure 2 As shown, the bushing 1 is cylindrical and horizontally arranged, and the slide rod 2 is cylindrical and horizontally inserted inside the bushing 1. The front end of the slide rod 2 passes through the front end of the bushing 1 and the slide rod 2 can move axially relative to the bushing 1.

[0021] The oil-proof structure includes an annular oil-absorbing cotton 3 and an oil guide plate 4 fixed to the bushing 1. The oil-absorbing cotton 3 is sleeved on the outer side of the front end of the slide rod 2 and is clearance-fitted with the slide rod 2. The end of the oil-absorbing cotton 3 facing the bushing 1 is in contact with the front end face of the bushing 1. The oil guide plate 4 includes an annular sleeve portion 4a and an elongated oil guide portion 4b. The sleeve portion 4a is sleeved on the outer side of the front end of the slide rod 2, and the oil guide portion 4b is vertically connected to the lower side of the sleeve portion 4a. The horizontal width of the oil guide portion 4b gradually decreases from top to bottom, while the thickness remains constant. The oil-absorbing cotton 3 is located between the sleeve portion 4a and the front end of the bushing 1, and the sleeve portion 4a is in contact with the oil-absorbing cotton 3. In this embodiment, the oil-absorbing cotton 3 is made of cotton material, and the inner diameter of the sleeve portion 4a is larger than the inner diameter of the oil-absorbing cotton 3; the oil guide plate 4 is an integral structure.

[0022] The top of the front end of the bushing 1 is cut into a flat mounting surface 1a along the horizontal direction. The oil guide plate 4 also includes a flat connecting part 4c horizontally disposed on the upper side of the bushing 1. The connecting part 4c is connected to the top of the sleeve part 4a, and the lower side of the connecting part 4c abuts against the mounting surface 1a. The connecting part 4c is fixed to the bushing 1 by a fastener that passes vertically through the connecting part 4c. In this embodiment, a waist-shaped hole 4d is opened through the connecting part 4c in the vertical direction. The length direction of the waist-shaped hole 4d is consistent with the axial direction of the bushing 1. The fastener is a screw, one end of which passes through the waist-shaped hole 4d and is threaded to the bushing 1. The head of the screw can be pressed tightly against the upper side of the connecting part 4c.

[0023] The oil-proof structure of this slide rod and bushing features an oil-absorbing cotton 3 and an oil guide plate 4 at the front end of the bushing 1. The annular oil-absorbing cotton 3 and the annular sleeve portion 4a are both sleeved on the outside of the slide rod 2, without affecting the axial movement of the slide rod 2. At the same time, the sleeve portion 4a of the oil guide plate 4, which is fixed to the bushing 1, axially limits the oil-absorbing cotton 3 to the end of the front end of the bushing 1, preventing gaps from forming between the oil-absorbing cotton 3 and the bushing 1.

[0024] When the slide bar 2 moves forward axially relative to the bushing 1, the lubricating oil it carries out is absorbed by the oil cotton 3, preventing the lubricating oil from being splashed out and contaminating the inside of the sewing machine housing. When the oil cotton 3 is full of oil, the oil will flow downward along the sleeve part 4a that is in contact with the oil cotton 3 and the long strip-shaped oil guide part 4b connected to the lower side of the sleeve part 4a to the oil storage tank located below the oil guide plate 4 inside the machine housing for reuse. For example, an oil pump can be used to transport the oil in the oil storage tank back to the location that needs lubrication.

[0025] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An oil-proof structure for a sliding rod and a bushing, wherein the bushing (1) is cylindrical, the sliding rod (2) is rod-shaped and passes through the bushing (1), and the front end of the sliding rod (2) protrudes from the front end of the bushing (1), characterized in that, The oil-proof structure includes an annular oil-absorbing cotton (3) and an oil guide plate (4) fixed to the bushing (1). The oil cotton (3) is sleeved on the outside of the front end of the slide rod (2) and is clearance-fitted with the slide rod (2). One end of the oil cotton (3) facing the bushing (1) is close to the front end face of the bushing (1). The oil guide plate (4) includes an annular sleeve part (4a) and a strip-shaped oil guide part (4b). The sleeve part (4a) is sleeved on the outside of the front end of the slide rod (2). The oil guide part (4b) is vertically connected to the lower side of the sleeve part (4a). The oil cotton (3) is located between the sleeve part (4a) and the front end of the bushing (1) and the sleeve part (4a) is close to the oil cotton (3).

2. The oil-proof structure of the slide rod and bushing according to claim 1, characterized in that, The inner diameter of the sleeve (4a) is larger than the inner diameter of the oil cotton (3).

3. The oil-proof structure for a slide rod and a bushing according to claim 1 or 2, characterized in that, The horizontal width of the oil guide section (4b) gradually decreases from top to bottom.

4. The oil-proof structure for a slide rod and a bushing according to claim 1 or 2, wherein The oil guide plate (4) also includes a plate-shaped connecting part (4c) horizontally arranged on the upper side of the bushing (1). The connecting part (4c) is connected to the top of the sleeve part (4a). The connecting part (4c) is fixed to the bushing (1) by a fastener that passes vertically through the connecting part (4c).

5. The oil-proof structure for the slide rod and bushing according to claim 4, characterized in that, The top of the front end of the bushing (1) has a horizontally set mounting plane (1a), and the lower side of the connecting part (4c) abuts against the mounting plane (1a).

6. The oil-proof structure of a slide rod and a bushing according to claim 5, wherein The connecting part (4c) has a waist-shaped hole (4d) extending vertically through it, and the length direction of the waist-shaped hole (4d) is consistent with the axial direction of the bushing (1).

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