CN220842732U

CN220842732U - Tyre lifter

Info

Publication number: CN220842732U
Application number: CN202322840018.XU
Authority: CN
Inventors: 李谢宠
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-10-23
Filing date: 2023-10-23
Publication date: 2024-04-26
Anticipated expiration: 2033-10-23

Abstract

The utility model relates to a tire lifter, and belongs to the technical field of automobile accessories. The technical proposal is as follows: a locking wheel (3) is arranged at the position, close to the front bracket (1), on the rotating shaft (29); a plurality of grooves (25) are formed in the circumference of the locking wheel (3), a locking wheel baffle (4) is arranged above the locking wheel (3), and a clamping block (26) matched with the grooves (25) on the locking wheel (3) is arranged on the locking wheel baffle (4); the front support (1) above the locking wheel (3) is provided with a guide column (19), the locking wheel baffle (4) is provided with a guide hole matched with the guide column (19), and the locking wheel baffle (4) slides back and forth on the guide column (19). The utility model has the beneficial effects that: the gear set is adopted for transmission, the transmission ratio is improved, and the transmission shaft is locked and positioned through the matching of the locking wheel and the locking wheel baffle; because of the protection of the shell, even a small amount of sediment is permeated into the shell, the gear set transmission is not greatly influenced, and the time and labor are saved when the spare tire is lifted.

Description

Tyre lifter

Technical Field

The utility model relates to a tire lifter, in particular to a lifter for lifting a spare tire of a freight car, and belongs to the technical field of car accessories.

Background

The spare tire is a replacement tire prepared for preventing the vehicle from running abnormally due to the abnormal use of the tire in the running process of the vehicle, and has the function of ensuring that the vehicle can run to the nearest maintenance station. The spare tire is usually installed on the bottom of the truck, the diameter of the rim of the spare tire of the medium-sized truck is 18-24 inches, the dead weight exceeds 100kg, and when the spare tire is required to be replaced if the tire is in fault during the running process of the truck, the spare tire of the truck is lifted, so that the truck is very time-consuming and labor-consuming; the spare tire lifting is generally completed by using a spare tire lifter fixed on a girder of a vehicle body, so that a driver can conveniently replace an abnormal tire. The prior art tire lifter installed on the girder of a truck is mainly composed of a worm gear mechanism, for example: chinese patent CN2023211943051 entitled "truck spare tire lifter", CN2015202092652 entitled "lifting mechanism of an automobile spare tire lifter", etc., but since the tire lifter for a truck is mounted on a girder under a carriage, under the vehicle body, the environment is bad, the tire lifter is easy to enter silt, and once the silt enters a worm gear mechanism, it is very laborious to rotate the worm; if the tyre lifter uses gear set transmission, the transmission ratio can be improved, but the problem of locking and positioning of the transmission shaft after the tyre is lifted is faced.

Disclosure of utility model

The utility model aims to provide a tire lifter, which adopts gear set transmission to improve transmission ratio and locks and positions a transmission shaft through matching of a locking wheel and a locking wheel baffle plate; because the shell protects, even a small amount of sediment is permeated into the shell, the gear set transmission is not greatly influenced, the spare tire is lifted, time and labor are saved, and the technical problems existing in the prior art are solved.

The technical scheme of the utility model is as follows:

A tyre lifter comprises a front bracket, a rear bracket, a chain wheel, a lifting chain, a rotating shaft, a ratchet pawl mechanism and a gear set, wherein the front bracket and the rear bracket are arranged in parallel through screw rod support; a rotating shaft is arranged on the front support, a locking wheel is arranged on the rotating shaft close to the front support, and a ratchet pawl mechanism is arranged on the rotating shaft; the front end of the rotating shaft is provided with a rotating wheel which is matched with the crank, and the rotating power of the rotating shaft is provided by rotating the crank; the rear end of the rotating shaft is connected with the chain wheel after the speed change through the gear set; the circumference of the locking wheel is provided with a plurality of grooves, a locking wheel baffle is arranged above the locking wheel, and a clamping block matched with the grooves on the locking wheel is arranged on the locking wheel baffle; the front support above the locking wheel is provided with a guide post, the locking wheel baffle is provided with a guide hole matched with the guide post, the locking wheel baffle slides back and forth on the guide post to drive a clamping block on the locking wheel baffle to be clamped or separated from a groove on the locking wheel, and the rotating shaft is locked or released.

Further, the front bracket is provided with a front cover, and the locking wheel, the ratchet and pawl mechanism, the locking wheel and the locking wheel baffle are arranged in the front cover; the rear bracket is provided with a rear cover, and the gear set is arranged in the rear cover.

Further, a connecting rod is arranged on the locking wheel baffle, a connecting rod stop block is arranged at the end part of the connecting rod, a spring is arranged on the connecting rod between the locking wheel baffle and the connecting rod stop block, an L-shaped clamping groove is formed in the end part of the connecting rod stop block, a claw matched with the L-shaped clamping groove is arranged on the end part of the push-pull rod, the claw is clamped in the L-shaped clamping groove, and the locking wheel baffle is driven to move back and forth on the guide post by pulling out or pushing in the push-pull rod.

Further, two guide posts are parallel to each other and are perpendicular to the front support, and two guide holes are formed in the locking wheel baffle; the end of the guide post is provided with a check ring to prevent the baffle plate of the locking wheel from sliding out of the guide post.

Further, a crank hole and a push-pull rod hole are formed in the front cover, and the crank and the push-pull rod are respectively inserted from the crank hole and the push-pull rod hole.

Further, a pressing chain wheel is arranged beside the chain wheel between the front bracket and the rear bracket, and the chain wheel is matched with the pressing chain wheel to press the lifting chain.

Further, the crank and the rotating wheel are in a detachable structure, the push-pull rod and the connecting rod stop block are in a detachable structure, and the crank and the push-pull rod are independently arranged.

Furthermore, the crank and the rotating wheel can not be separated, and the push-pull rod and the connecting rod stop block can not be separated, so that the crank or the push-pull rod does not need to be placed independently.

The utility model is fixedly arranged on a girder of a truck body and positioned at the bottom of the truck. For example: bolt holes are arranged on the front bracket and the rear bracket, and the utility model is fixedly arranged on a girder of a truck body or a mounting bracket arranged on the girder through bolts. The spare tyre of the truck is hoisted and stored by the lifting chain, the push-pull rod is pushed backwards, and the clamping blocks on the baffle plate of the locking wheel are clamped in the grooves on the locking wheel to be locked and positioned. If the spare tire is needed, the push-pull rod is pulled out forwards, the clamping block on the baffle plate of the locking wheel is separated from the groove on the locking wheel, the locking positioning is invalid, the rotating wheel and the rotating shaft are rotated by the crank, and the spare tire is put down for replacing the tire; the replaced tire is lifted by the utility model, and the tire replacement of the truck is completed.

The utility model has the beneficial effects that: the gear set is adopted for transmission, the transmission ratio is improved, and the transmission shaft is locked and positioned through the matching of the locking wheel and the locking wheel baffle; because of the protection of the shell, even a small amount of sediment is permeated into the shell, the gear set transmission is not greatly influenced, and the time and labor are saved when the spare tire is lifted.

Drawings

FIG. 1 is a schematic diagram of the internal structure of an embodiment of the present utility model;

FIG. 2 is a schematic top view of an embodiment of the present utility model;

FIG. 3 is a schematic diagram illustrating a locked state according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram illustrating an operation state of an embodiment of the present utility model;

FIG. 5 is an enlarged schematic view of a portion of an embodiment of the present utility model;

In the figure: the front bracket 1, the rear bracket 2, the locking wheel 3, the locking wheel baffle 4, the push-pull rod 5, the friction plate 6, the ratchet wheel 7, the friction cover 8, the rotating wheel 9, the front cover 10, the driving wheel 11, the rear cover 12, the lifting chain 13, the pawl 14, the spindle gear 15, the chain wheel driving wheel 16, the chain wheel 17, the pressing chain wheel 18, the guide post 19, the retainer ring 20, the screw 21, the spring 22, the clamping groove 23, the clamping claw 24, the groove 25, the clamping block 26, the connecting rod 27, the connecting rod stop 28, the rotating shaft 29, the crank 30, the crank hole 31 and the push-pull rod hole 32.

Description of the embodiments

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings.

A tire lifter comprises a front bracket 1, a rear bracket 2, a chain wheel 17, a lifting chain 13, a rotating shaft 29, a ratchet pawl mechanism and a gear set, wherein the front bracket 1 and the rear bracket 2 are supported by a screw 21 to be arranged in parallel, the chain wheel 17 is arranged between the front bracket 1 and the rear bracket 2, and the lifting chain 13 is arranged on the chain wheel 17; a rotating shaft 29 is arranged on the front bracket 1, a locking wheel 3 is arranged on the rotating shaft 29 at a position close to the front bracket 1, and a ratchet and pawl mechanism is arranged on the rotating shaft 29; the front end of the rotating shaft 29 is provided with a rotating wheel 9, the rotating wheel 9 is matched with a crank 30, and the rotating power of the rotating shaft 29 is provided by rotating the crank 30; the rear end of the rotating shaft 29 is connected with the chain wheel 17 after being changed in speed by a gear set; a plurality of grooves 25 are formed in the circumference of the locking wheel 3, a locking wheel baffle 4 is arranged above the locking wheel 3, and a clamping block 26 matched with the grooves 25 on the locking wheel 3 is arranged on the locking wheel baffle 4; the front support 1 above the locking wheel 3 is provided with a guide post 19, the locking wheel baffle 4 is provided with a guide hole matched with the guide post 19, the locking wheel baffle 4 slides back and forth on the guide post 19 to drive a clamping block 26 on the locking wheel baffle 4 to be clamped or separated from a groove 25 on the locking wheel 3, and a rotating shaft 29 is locked or released.

The front bracket 1 is provided with a front cover 10, and the locking wheel 3, the ratchet and pawl mechanism, the locking wheel 3 and the locking wheel baffle 4 are arranged in the front cover 10; the rear bracket 2 is provided with a rear cover 12, and a gear set is disposed in the rear cover 12.

The locking wheel baffle 4 is provided with a connecting rod 27, the end part of the connecting rod 27 is provided with a connecting rod stop block 28, the connecting rod 27 between the locking wheel baffle 4 and the connecting rod stop block 28 is provided with a spring 22, the end part of the connecting rod stop block 28 is provided with an L-shaped clamping groove 23, the end part of the push-pull rod 5 is provided with a claw 24 matched with the L-shaped clamping groove 23, the claw 24 is clamped in the L-shaped clamping groove 23, and the locking wheel baffle 4 is driven to move back and forth on the guide post 19 by pulling out or pushing in the push-pull rod 5.

The two guide posts 19 are parallel to each other and are perpendicular to the front bracket 1, and two guide holes are formed in the locking wheel baffle 4; the end of the guide post 19 is provided with a retainer ring 20 to prevent the locking wheel baffle 4 from sliding out of the guide post 19.

The front cover 10 is provided with a crank hole 31 and a push-pull rod hole 32, and the crank 20 and the push-pull rod 5 are respectively inserted from the crank hole 31 and the push-pull rod hole 32.

A pressing chain wheel 18 is arranged beside the chain wheel 17 between the front bracket 1 and the rear bracket 2, and the chain wheel 17 is matched with the pressing chain wheel 18 to press the lifting chain 13.

The crank 20 and the rotating wheel are in a detachable structure, the push-pull rod 5 and the connecting rod stop block 28 are in a detachable structure, and the crank 20 and the push-pull rod 5 are independently arranged.

The crank 20 and the rotating wheel are not separated, the push-pull rod 5 and the connecting rod stop block 28 are not separated, and the crank 20 or the push-pull rod 5 is not required to be placed separately.

The utility model is fixedly arranged on a girder of a truck body and positioned at the bottom of the truck. For example: bolt holes are arranged on the front bracket 1 and the rear bracket 2, and the utility model is fixedly arranged on a girder of a truck body or a mounting bracket arranged on the girder through bolts. The spare tyre of the truck is lifted and stored by the lifting chain 13, the push-pull rod 5 is pushed backwards, the clamping blocks 26 on the locking wheel baffle 4 are clamped in the grooves 25 on the locking wheels 3, and locking and positioning are performed (refer to figure 3). If a spare tire is needed, the push-pull rod 5 is pulled out forwards, the clamping blocks 26 on the locking wheel baffle 4 are separated from the grooves 25 on the locking wheel 3, and the locking positioning is invalid. (refer to fig. 4) the rotating wheel 9 and the rotating shaft 29 are rotated by the crank 30, and the spare tire is put down for tire replacement; the replaced tire is lifted by the utility model, and the tire replacement of the truck is completed.

In an embodiment, the ratchet-pawl mechanism comprises a friction plate 6, a ratchet 7 and a pawl 14, wherein the friction plate 6 and the ratchet 7 are arranged on a rotating shaft 29, the pawl 14 is arranged on the front bracket 1, and the ratchet 7 and the pawl 14 are matched to prevent the rotating shaft 29 from reversing.

The rotating shaft 29 is a common two-axis concentric shaft known in the art, for example, a double-axis concentric rotating device named as CN200820059071.9, and the rotating shaft 29 is composed of an outer rotating shaft and an inner rotating shaft, and the two shafts are concentric.

The gear set comprises a driving wheel 11, a spindle gear 15 and a chain wheel driving wheel 16, and is arranged between the rear bracket 2 and the rear cover 12, the spindle gear 15 and the chain wheel driving wheel 16 are respectively connected with a rotating shaft 29, the spindle gear 15 is smaller, and the chain wheel driving wheel 16 is larger; the driving wheel 11 is two groups of gears with the same size, the number of the driving wheels 11 is two, the driving wheels 11 are respectively arranged on two sides of the spindle gear 15 and the chain wheel driving wheel 16, the large gear of the driving wheel 11 is matched with the smaller spindle gear 15, and the small gear of the driving wheel 11 is matched with the larger chain wheel driving wheel 16. The rotation shaft 29 sequentially passes through the front bracket 1, the chain wheel 17 and the rear bracket 2, the inner rotation shaft of the rotation shaft 29 is connected with the spindle gear 15, the outer rotation shaft connects the chain wheel driving wheel 16 with the chain wheel 17, the rotation shaft 29 rotates, the spindle gear 15 is driven to rotate by the inner rotation shaft, power is transmitted through the driving wheels 11 on two sides in a variable speed manner, the chain wheel driving wheel 16 is driven to rotate, and the chain wheel driving wheel 16 drives the chain wheel 17 to rotate by the outer rotation shaft. The transmission ratio of the gear set is 7:1, and the transmission ratio of a worm gear mechanism of a tire lifting mechanism of a truck in the prior art is generally 4.5:1, the utility model rotates more lightly.

Claims

1. A tire lifter, characterized by: comprises a front bracket (1), a rear bracket (2), a chain wheel (17), a lifting chain (13), a rotating shaft (29), a ratchet pawl mechanism and a gear set, wherein the front bracket (1) and the rear bracket (2) are supported by a screw rod (21) to be arranged in parallel, the chain wheel (17) is arranged between the front bracket (1) and the rear bracket (2), and the lifting chain (13) is arranged on the chain wheel (17); a rotating shaft (29) is arranged on the front support (1), a locking wheel (3) is arranged on the rotating shaft (29) at a position close to the front support (1), and a ratchet and pawl mechanism is arranged on the rotating shaft (29); the front end of the rotating shaft (29) is provided with a rotating wheel (9), the rotating wheel (9) is matched with the crank (30), and the rotating power of the rotating shaft (29) is provided by rotating the crank (30); the rear end of the rotating shaft (29) is connected with the chain wheel (17) after gear change through a gear set; a plurality of grooves (25) are formed in the circumference of the locking wheel (3), a locking wheel baffle (4) is arranged above the locking wheel (3), and a clamping block (26) matched with the grooves (25) on the locking wheel (3) is arranged on the locking wheel baffle (4); the front support (1) above the locking wheel (3) is provided with a guide column (19), the locking wheel baffle (4) is provided with a guide hole matched with the guide column (19), the locking wheel baffle (4) slides back and forth on the guide column (19) to drive a clamping block (26) on the locking wheel baffle (4) to be clamped or separated from a groove (25) on the locking wheel (3), and a rotating shaft (29) is locked or released.

2. A tyre lifter according to claim 1, characterized in that: the front bracket (1) is provided with a front cover (10), and the locking wheel (3), the ratchet pawl mechanism, the locking wheel (3) and the locking wheel baffle (4) are arranged in the front cover (10); the rear bracket (2) is provided with a rear cover (12), and the gear set is arranged in the rear cover (12).

3. A tyre lifter according to claim 2, characterized in that: be equipped with connecting rod (27) on locking wheel baffle (4), the tip of connecting rod (27) is equipped with connecting rod dog (28), is equipped with spring (22) on connecting rod (27) between locking wheel baffle (4) and connecting rod dog (28), connecting rod dog (28) tip is equipped with draw-in groove (23) of L shape, is equipped with on the tip of push-and-pull rod (5) with draw-in groove (23) assorted jack catch (24) of L shape, jack catch (24) card is in draw-in groove (23) of L shape, through pulling out or pushing push-and-pull rod (5), drives locking wheel baffle (4) and reciprocates on guide post (19).

4. A tyre lifter according to claim 3, characterized in that: the two guide posts (19) are parallel to each other and are perpendicular to the front bracket (1), and two guide holes are formed in the locking wheel baffle (4); the end of the guide post (19) is provided with a retainer ring (20).

5. A tyre lifter according to claim 3, characterized in that: the front cover (10) is provided with a crank hole (31) and a push-pull rod hole (32), and the crank (30) and the push-pull rod (5) are respectively inserted from the crank hole (31) and the push-pull rod hole (32).

6. A tyre lifter according to claim 1 or 2, characterized in that: a pressing chain wheel (18) is arranged beside a chain wheel (17) between the front bracket (1) and the rear bracket (2), and the chain wheel (17) is matched with the pressing chain wheel (18) to press the lifting chain (13).