CN219438635U

CN219438635U - Engagement mechanism for telescopic legs of step stool

Info

Publication number: CN219438635U
Application number: CN202320329014.2U
Authority: CN
Inventors: 李�杰; 于波; 李凤铭
Original assignee: Tianjin Jinmao Household Items Co ltd
Current assignee: Tianjin Jinmao Household Items Co ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-08-01
Anticipated expiration: 2033-02-28

Abstract

The utility model relates to the technical field of step stools, in particular to an engagement mechanism of telescopic legs of a step stool, which comprises an engagement piece and an elastic piece, wherein a detachable rotating shaft is arranged on a first supporting rod, and tooth parts for being engaged with a height-adjusting rack are respectively arranged at two ends of the engagement piece; when the occluding part is rotationally connected with the first supporting rod through the rotating shaft, one tooth part is meshed with the heightening rack under the action of the elastic part. The utility model has simple structure, prolongs the service life of the occluding member by arranging the tooth parts at the two ends of the occluding member, can reduce the maintenance cost of the occluding mechanism at the later stage, reduces the replacement frequency of the occluding member and plays a role in saving the material resources of the occluding member to a certain extent.

Description

Engagement mechanism for telescopic legs of step stool

Technical Field

The utility model relates to the technical field of step stools, in particular to a meshing mechanism of telescopic legs of a step stool.

Background

The step stool is a common tool, comprises a step platform and a plurality of step legs arranged below the step platform, so that an operator can pedal the step platform and operate the step platform, the height of the step platform provided by the conventional step stool is certain, but in a specific use scene, the required step platform is different in height, the step legs cannot be adjusted by most step stools on the market, or the defect of complicated height adjustment operation or insufficient stability of the step legs after height adjustment exists.

The Chinese patent application with publication number of CN207660524U discloses a telescopic leg structure of a ladder stool, and the technical scheme recorded by the telescopic leg structure can be used for heightening ladder legs through a meshing mechanism, and the heightened ladder legs are stable, so that the technical problem is solved.

However, through engineering practice, in the technical scheme described in the patent with publication number CN207660524U, the tooth portion of the engaging tooth included in the engaging mechanism is easy to wear, in order to ensure smooth pushing of engineering, more engaging teeth are needed for the staff to reserve, when the tooth portion of a certain engaging tooth is damaged, a new engaging tooth is replaced, so that the later maintenance cost of the engaging mechanism is higher, the replacement frequency of the new engaging tooth and the old engaging tooth is relatively higher, and waste of engaging tooth material resources is caused to a certain extent.

Disclosure of Invention

The present utility model is directed to solving at least one of the technical problems existing in the related art. Therefore, the utility model provides a snapping mechanism of the telescopic legs of the step stool.

The utility model is realized by the following technical scheme: the engagement mechanism comprises an engagement piece and an elastic piece, wherein a detachable rotating shaft is arranged on the first support rod, and tooth parts for being meshed with the height-adjusting racks are respectively arranged at two ends of the engagement piece; when the occluding part is rotationally connected with the first supporting rod through the rotating shaft, one tooth part is meshed with the heightening rack under the action of the elastic part.

Preferably, each end of the engaging member is provided with two teeth, and the two teeth at each end of the engaging member are arranged back to back.

Preferably, the engaging member is provided with a process hole.

Preferably, a U-shaped through groove is formed in one side, away from the second support rod, of the first support rod, the engagement mechanism is arranged in the U-shaped through groove, and an avoidance hole is formed in the U-shaped through groove, close to the bottom wall of the height-adjusting rack; when the engaging member is rotatably connected to the first support rod through the rotation shaft, only one tooth portion passes through the avoidance hole and is engaged with the height-adjusting rack under the action of the elastic member.

Preferably, a sheath is arranged on one side of the occluding piece far away from the second supporting rod, clamping blocks are convexly arranged on two opposite side walls of the U-shaped through groove, and clamping grooves matched with the clamping blocks are formed in the middle of the sheath.

The above technical solutions in the embodiments of the present utility model have at least one of the following technical effects: the utility model has simple structure, prolongs the service life of the occluding member by arranging the tooth parts at the two ends of the occluding member, can reduce the maintenance cost of the occluding mechanism at the later stage, reduces the replacement frequency of the occluding member and plays a role in saving the material resources of the occluding member to a certain extent; the service life of the occluding member can be further prolonged by arranging two tooth parts at each end of the occluding member; the occlusion mechanism is arranged in the U-shaped through groove, so that the risk that a tooth part meshed with the heightening rack is accidentally separated from the heightening rack due to collision of a worker on the occlusion piece can be reduced, and the stability of the occlusion mechanism is improved; the sheath can further reduce the risk that the tooth parts meshed with the heightening rack are accidentally separated from the heightening rack due to accidental collision of the occluding piece by a worker; the process holes can reduce the weight of the engaging piece and save materials.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic view of the telescopic leg of the step stool according to the present utility model when Yu Tiping steps are installed.

Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

Fig. 3 is an exploded view of the first support bar and the second support bar according to the present utility model.

Fig. 4 is a schematic view of the structure of the engaging member according to the present utility model.

Fig. 5 is a schematic view of a jacket structure provided by the present utility model.

FIG. 6 is a schematic view of the torsion spring structure provided by the present utility model.

In the figure: 1. a ladder platform; 2. a first support bar; 201. a bottom wall; 202. a sidewall; 203. avoidance holes; 3. a second support bar; 301. height-adjusting racks; 4. a sleeve; 5. a bite piece; 501. tooth parts; 502. a process hole; 6. a sheath; 601. a clamping groove; 7. and (3) a torsion spring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.

In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

As shown in fig. 1 to 6, the utility model provides a snapping mechanism of a telescopic leg of a step stool, the telescopic leg of the step stool comprises a first supporting rod 2 and a second supporting rod 3 which can slide relatively, the first supporting rod 2 and the second supporting rod 3 are arranged side by side, in the embodiment, a sleeve 4 is sleeved on the periphery of the second supporting rod 3, the second supporting rod 3 can slide along the sleeve 4, and the sleeve 4 is fixedly connected with the first supporting rod 2. The telescopic legs of the step stool are provided with a plurality of telescopic legs of the step stool, the top end of the first supporting rod 2 is used for installing the step platform 1, one side, close to the first supporting rod 2, of the second supporting rod 3 is fixedly connected with a heightening rack 301, the engagement mechanism comprises an engagement piece 5 and an elastic piece, a detachable rotating shaft is installed on the first supporting rod 2, the rotating shaft can be specifically installed on the first supporting rod 2 in a mode of matching a shoulder screw with a nut or in a mode of matching a perforated pin with a cotter pin, tooth parts 501 used for being meshed with the heightening rack 301 are respectively arranged at two ends of the engagement piece 5, in the embodiment, the elastic piece is a torsion spring 7, the torsion spring 7 is sleeved on the rotating shaft, when the engagement piece 5 is connected to the first supporting rod 2 in a rotating mode through the rotating shaft, one torsion arm of the torsion spring 7 is abutted to the first supporting rod 2, the other torsion arm of the torsion spring 7 is abutted to one end of the engagement piece 5, the torsion spring 7 is used for applying elastic force to the engagement piece 5, one end of the engagement piece 5 is enabled to be enabled to have a tooth part 501 which moves towards the heightening rack, and the tooth part 301 is enabled to be meshed with the tooth part which moves away from the heightening rack. In the actual use process, if the tooth portion that uses at present wears out, the staff need not to change new interlock piece 5, only need adjust the installation direction of interlock piece 5 for another complete tooth portion meshes with heightening rack 301 under torsional spring 7 effect, can make interlock mechanism normally work again, and then prolonged interlock piece 5's life, can reduce interlock mechanism later maintenance cost, reduce interlock piece 5's change frequency, played the effect of saving interlock piece 5 material resource to a certain extent.

As shown in fig. 4, each end of the engaging member 5 is provided with two teeth 501, which can further prolong the service life of the engaging member 5 and reduce the maintenance cost of the engaging mechanism in the later period. The two teeth 501 at each end of the bite 5 are arranged back-to-back. Specifically, when the tooth 501 is engaged with the height-adjusting rack 301, the side of the tooth 501 opposite to the height-adjusting rack 301 is an engagement surface. The two teeth 501 at each end of the engaging member 5 are disposed back to back, which means that the engaging surfaces corresponding to the two teeth 501 at each end of the engaging member 5 face away.

The engaging member 5 is provided with two process holes 502, specifically, as shown in fig. 4, the number of the process holes 502 is two, and the two process holes 502 are respectively located between two teeth 501 at each end of the engaging member 5, so that the weight of the engaging member 5 can be reduced, and meanwhile, the material can be saved.

The U-shaped through groove is formed in one side, away from the second support rod 3, of the first support rod 2, the length direction of the U-shaped through groove is identical to that of the first support rod 2, the engagement mechanism is arranged in the U-shaped through groove, and the bottom wall 201, close to the height-adjusting rack 301, of the U-shaped through groove is provided with an avoidance hole 203. When the occluding member 5 is rotationally connected to the first supporting rod 2 through the rotating shaft, under the action of the elastic member, only one tooth part passes through the avoidance hole 203 and is meshed with the heightening rack 301, and the occluding mechanism is arranged in the U-shaped through groove, so that the risk that the meshing member 5 is collided by a worker to cause the tooth part meshed with the heightening rack 301 to be accidentally separated from the heightening rack 301 can be reduced, and the stability of the occluding mechanism is improved.

The sheath 6 has been arranged to one side that interlock piece 5 kept away from second bracing piece 3, two opposite lateral walls 202 of U-shaped logical groove are protruding to be equipped with the fixture block, sheath 6 middle part be equipped with fixture block looks adaptation draw-in groove 601, can further reduce the unexpected interlock piece 5 that bumps with of staff lead to with the unexpected risk of adjusting up rack 301 that breaks away from of gear portion meshing with adjusting up rack 301.

The working principle of the engagement mechanism of the telescopic leg of the step stool provided by the utility model is that under the action of the torsion spring, one end of the engagement piece, which is abutted against the torsion spring, has a trend of moving away from the height-adjusting rack, and meanwhile, one tooth part at the other end of the engagement piece is stably engaged with the height-adjusting rack, and at the moment, the first support rod and the second support rod are relatively fixed, so that the ladder platform can be supported; if the length of the telescopic leg of the step stool needs to be adjusted, the occluding part is pressed, one end, which is abutted against the torsional spring, of the occluding part moves towards the direction close to the heightening rack, so that the tooth part at the other end of the occluding part is far away from the heightening rack, at the moment, under the action of the sleeve, the second supporting rod can slide relative to the first supporting rod, so that the total length of the telescopic leg of the step stool is changed, when the total length of the telescopic leg of the step stool reaches the preset length, the occluding part is released, one tooth part of the occluding part is meshed to the heightening rack again under the action of the elasticity of the torsional spring, and at the moment, the first supporting rod and the second supporting rod are kept relatively fixed again, and can play a supporting role on the step platform. The utility model has simple structure, prolongs the service life of the occluding member by arranging the tooth parts at the two ends of the occluding member, can reduce the maintenance cost of the occluding mechanism at the later stage, reduces the replacement frequency of the occluding member and plays a role in saving the material resources of the occluding member to a certain extent; the service life of the occluding member can be further prolonged by arranging two tooth parts at each end of the occluding member; the occlusion mechanism is arranged in the U-shaped through groove, so that the risk that a tooth part meshed with the heightening rack is accidentally separated from the heightening rack due to collision of a worker on the occlusion piece can be reduced, and the stability of the occlusion mechanism is improved; the sheath can further reduce the risk that the tooth parts meshed with the heightening rack are accidentally separated from the heightening rack due to accidental collision of the occluding piece by a worker; the process holes can reduce the weight of the engaging piece and save materials.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The engagement mechanism of the telescopic leg of the step stool comprises a first supporting rod and a second supporting rod which can slide relatively, and a heightening rack is fixedly connected to one side, close to the first supporting rod, of the second supporting rod;

when the occluding part is rotationally connected with the first supporting rod through the rotating shaft, one tooth part is meshed with the heightening rack under the action of the elastic part.

2. The bite mechanism for a telescopic leg of a step stool according to claim 1, wherein each end of said bite member is provided with two teeth, said two teeth of each end of said bite member being disposed back-to-back.

3. The bite mechanism for telescopic legs of a step ladder of claim 2, wherein said bite member is provided with a craft hole.

4. The engagement mechanism of the telescopic legs of the step stool according to claim 1, wherein a U-shaped through groove is formed in one side, away from the second supporting rod, of the first supporting rod, the engagement mechanism is arranged in the U-shaped through groove, and an avoidance hole is formed in the U-shaped through groove, close to the bottom wall of the heightening rack;

when the engaging member is rotatably connected to the first support rod through the rotation shaft, only one tooth portion passes through the avoidance hole and is engaged with the height-adjusting rack under the action of the elastic member.

5. The engagement mechanism for telescopic legs of a step stool according to claim 4, wherein a sheath is arranged on one side of the engagement member away from the second supporting rod, two opposite side walls of the U-shaped through groove are convexly provided with clamping blocks, and a clamping groove matched with the clamping blocks is formed in the middle of the sheath.