CN-224212940-U - Dustproof lower sleeve of transmission shaft of sewing machine

Abstract

The utility model belongs to the technical field of sewing machines, in particular to a lower sleeve of a transmission shaft of a dustproof sewing machine, which comprises a lower sleeve body, wherein two bearings are fixedly connected to the inner wall of the lower sleeve body, and the two bearings are fixedly connected to the same transmission shaft body. According to the utility model, the T-shaped bayonet lock is pulled to stretch the spring in the moving process, the T-shaped bayonet lock is separated from one of the clamping grooves, the T-shaped rod is rotated positively to drive the second gear to rotate, the second gear drives the screw rod to rotate through the first gear, the screw rod drives the moving plate to move, the moving plate drives the sealing cover to move, so that the two sealing covers move in the directions away from each other, the bearing leaks out, the tension on the T-shaped bayonet lock is released at the moment, the spring in the stretched state is reset, the spring drives the T-shaped bayonet lock to be clamped with the other clamping groove in the clamping grooves, the lubricating oil is conveniently added to the bearing by workers, and special tools are not needed when the sealing cover is disassembled, so that the operation is simple and convenient.

Inventors

• WANG JIMING

Assignees

• 宁波市镇海健翔机械制造有限公司

Dates

Publication Date

20260508

Application Date

20250409

Claims (1)

1. 1. The lower sleeve of the transmission shaft of the dustproof sewing machine comprises a lower sleeve body (1) and is characterized in that two bearings (2) are fixedly connected to the inner wall of the lower sleeve body (1), two bearings (2) are fixedly connected with the same transmission shaft body (3), two rectangular blocks (4) are welded at the top of the lower sleeve body (1), a screw rod (5) is rotatably connected to the rectangular blocks (4), a first gear (6) is fixedly connected to the end of the screw rod (5), a U-shaped seat (7) is welded at the top of the lower sleeve body (1), a T-shaped rod (8) is rotatably connected to the top of the U-shaped seat (7), the end of the T-shaped rod (8) extends to the lower portion of the U-shaped seat (7) and is fixedly connected with a second gear (9), the second gear (9) is meshed with the first gear (6), a moving plate (10) is connected to the screw thread on the screw rod (5), sealing covers (11) are arranged at the two ends of the lower sleeve body (1), sealing covers (11) are sleeved on the top of the sealing covers (11) and correspond to the T-shaped seat (7), the top of the T-shaped seat (7) is provided with a sealing pin (12), the T-shaped clamping pin (13) is clamped with one clamping groove (12) in the plurality of clamping grooves (12), a spring (14) is fixedly connected between the inner wall of the bottom of the T-shaped clamping pin (13) and the top of the T-shaped rod (8), and the spring (14) is movably sleeved on the T-shaped clamping pin (13); two sliding grooves (15) are formed in the top of the lower sleeve body (1), and guide rods (16) are welded between the inner walls of the two sides of the sliding grooves (15); a sliding block (17) is connected to the guide rod (16) in a sliding manner, and the top of the sliding block (17) is fixedly connected with the bottom of the corresponding moving plate (10); Two limiting grooves (19) are formed in two sides of the lower sleeve body (1), and limiting blocks (20) are connected to the limiting grooves (19) in a sliding mode; An L-shaped plate (18) is welded on one side of the limiting block (20), and one side of the L-shaped plate (18) is fixedly connected with the other side of the corresponding sealing cover (11); The movable plate (10) is provided with a thread groove, and the movable plate (10) is in threaded connection with the corresponding screw rod (5) through the thread groove.

Description

Dustproof lower sleeve of transmission shaft of sewing machine Technical Field The utility model relates to the technical field of sewing machines, in particular to a lower sleeve of a transmission shaft of a dustproof sewing machine. Background The sewing machine is a machine which uses one or more sewing threads to form one or more stitches on the sewing material to interweave or stitch one or more layers of the sewing material, and generally consists of a machine head, a machine seat, a transmission shaft and accessories, wherein a lower sleeve plays a key role for the transmission shaft. The transmission shaft of the existing sewing machine is usually arranged on the lower sleeve through a bearing, the stable support and rotation of the transmission shaft can be realized through the mode, but the anti-dust mode has obvious defects in the aspect of dust prevention, the bearing part is directly exposed in the external environment and is easy to be invaded by dust, fiber scraps and other impurities, bearing abrasion is aggravated, the rotation precision and stability of the transmission shaft are further affected, the service life of the machine is shortened, in order to improve the situation, the mode that the sealing cover is arranged on the outer side of the transmission shaft sleeve through bolts is designed for trying to achieve the anti-dust effect, however, the design reduces the invasion of dust to a certain extent, but the sealing cover is fixed through bolts, the dismounting process is relatively complicated, special tools are needed to be used for dismounting, the difficulty and the time cost of maintenance work are increased, and when lubricating oil is needed to be added to the bearing, the anti-dust mode is also very inconvenient, and therefore the problem is solved by arranging the lower sleeve of the transmission shaft of the anti-dust type sewing machine. Disclosure of utility model (One) solving the technical problems Aiming at the defects of the prior art, the utility model provides a lower sleeve of a transmission shaft of a dustproof sewing machine, which solves the problems in the background art. (II) technical scheme The utility model adopts the following technical scheme for realizing the purposes: The utility model provides a sleeve under dustproof formula sewing machine transmission shaft, includes lower sleeve body, fixedly connected with two bearings on the inner wall of lower sleeve body, two fixedly connected with is the same transmission shaft body on the bearing, the top welding of lower sleeve body has two rectangular pieces, rotate on the rectangular piece and be connected with the lead screw, the tip fixedly connected with first gear of lead screw, the top welding of lower sleeve body has the U-shaped seat, the top rotation of U-shaped seat is connected with T shape pole, the tip of T shape pole extends to the below of U-shaped seat and fixedly connected with second gear, the second gear meshes with first gear, threaded connection has the movable plate on the lead screw, the both ends of lower sleeve body all are equipped with the sealed cowling, the sealed cowling is established on the transmission shaft body, the bottom fixed connection of sealed cowling's top and the movable plate that corresponds, be equipped with T shape bayonet lock on the T shape pole, the top of U-shaped seat is the annular and has seted up a plurality of draw-in grooves, T shape bayonet lock and a bayonet lock in a plurality of draw-in grooves looks draw-in groove and the bottom, the T shape bayonet lock is established between the spring and the top is connected with the movable spring. Further, two sliding grooves are formed in the top of the lower sleeve body, and guide rods are welded between the inner walls of the two sides of the sliding grooves. Further, the guide rod is connected with a sliding block in a sliding manner, and the top of the sliding block is fixedly connected with the bottom of the corresponding moving plate. Further, two limiting grooves are formed in two sides of the lower sleeve body, and limiting blocks are connected to the limiting grooves in a sliding mode. Further, one side of the limiting block is welded with an L-shaped plate, and one side of the L-shaped plate is fixedly connected with the other side of the corresponding sealing cover. Further, a thread groove is formed in the moving plate, and the moving plate is in threaded connection with the corresponding screw rod through the thread groove. (III) beneficial effects Compared with the prior art, the utility model provides the lower sleeve of the transmission shaft of the dustproof sewing machine, which has the following beneficial effects: According to the utility model, the T-shaped bayonet lock is pulled to stretch the spring in the moving process, the T-shaped bayonet lock is separated from one of the clamping grooves, the T-shaped rod is rotated positively to drive the second gear to rotate, the second gear