Plug-in type angle-adjusting shaft joint and float switch

Abstract

The utility model discloses a plug-in type angle-adjustable shaft joint and a float switch, and belongs to the technical field of shaft joints. Comprising a fixed arm and a rotating arm; the end, close to the fixed arm, of the rotating arm is provided with a plurality of protruding parts distributed circumferentially at intervals. The protruding part is made of an elastic material so as to have the capacity of elastic deformation towards or away from the circle center. Oblique tooth parts are fixedly arranged at the end parts of the convex parts; chamfers are formed in the peripheries of the helical tooth parts; a limiting convex strip is arranged on the periphery of the helical tooth part; limiting rings are arranged at the ends, close to the rotating arms, of the fixed arms. The inner diameter of the limiting ring is smaller than the outer diameter formed by the limiting protruding strips in the normal state. In a normal state, the outer diameter formed by the middles of the protruding parts is matched with the inner diameter of the limiting ring. The length of the protruding part is matched with the thickness of the limiting ring. During installation, the abutting face of the limiting protruding strip abuts against the end face of the limiting ring. The rotary arm and the fixed arm can be connected in an inserted mode through the limiting piece, so that the angle can be adjusted, and the rotary arm and the fixed arm can be fixed.

Description

Technical Field

[0001] The utility model belongs to the technical field of shaft joints, and more specifically, relates to a shaft joint with plug-in angle adjustment and a float switch. Background Art

[0002] With the increasing quality of life, people are paying more and more attention to the problem of drinking water health. In order to make drinking water purer, water purifiers have emerged and are widely used in families and office places.

[0003] Among them, a float switch for controlling the water level and automatically replenishing water is installed on the water purifier. In the prior art, when a staff member needs to adjust the included angle between the float and the float joint, it is usually necessary to unscrew the fastening screw, readjust the angle, and then use the fastening screw to fix the float and the float joint. However, the above process of disassembling and adjusting the angle is very cumbersome and often wastes a lot of time of the staff.

[0004] For example, the shaft joint and float switch with convenient angle adjustment with the patent number CN201720695823.X limits the connection between two joints through a limit shaft or a limit cap. Although the angle can be conveniently adjusted, the cost is relatively high and the practicability is relatively low. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a shaft joint with plug-in angle adjustment and a float switch, which can realize the way that the angle between the rotating arm and the fixed arm can be adjusted and fixed by plugging through a limiting member.

[0006] The shaft joint with plug-in angle adjustment of the utility model includes a fixed arm and a rotating arm; several protruding parts are arranged at one end of the rotating arm close to the fixed arm at circumferential intervals; the protruding parts are made of elastic materials to have the ability of elastic deformation towards or away from the center of the circle; inclined tooth parts are fixedly arranged at the ends of the protruding parts; chamfers are arranged on the outer periphery of the inclined tooth parts; limiting convex strips are arranged on the outer periphery of the inclined tooth parts; a limiting ring is arranged at one end of the fixed arm close to the rotating arm; the inner diameter of the limiting ring is smaller than the outer diameter formed by several limiting convex strips under normal state; under normal state, the outer diameter formed by the middle parts of several protruding parts matches the inner diameter of the limiting ring; the length of the protruding part matches the thickness of the limiting ring; during installation, the abutting surface of the limiting convex strip abuts against the end surface of the limiting ring.

[0007] As a further improvement of the utility model, the limiting ring is rotatably sleeved on the rotating arm; a plurality of circumferentially arranged limiting tooth grooves are arranged on the outer periphery of the limiting ring along the axial direction, the limiting tooth grooves extend from one side to the other side of the outer periphery of the limiting ring along the axial direction, and there is a distance between the limiting tooth grooves and the other side of the outer periphery of the limiting ring along the axial direction.

[0008] As a further improvement of the present utility model, the fixed arm further includes a connecting rod and a floating ball connecting part. The limiting ring is fixedly connected to the upper end of the connecting rod, and the lower end of the connecting rod is fixedly connected to the floating ball connecting part. The limiting ring, the connecting rod and the floating ball connecting part are integrally formed. The upper end of the floating ball connecting part is fixedly connected to the connecting rod, and the lower end of the floating ball connecting part is detachably connected to the floating ball.

[0009] As a further improvement of the present utility model, the abutting groove is located at one end of the connecting arm close to the limiting member, and the abutting groove is arc-shaped to wrap the outer periphery of the limiting ring. The inner arc size of the abutting groove matches the outer periphery size of the limiting ring. A plurality of limiting tooth parts matching the limiting tooth grooves are further provided on the inner wall of the abutting groove. The limiting tooth groove is the gap between two adjacent limiting tooth parts, and the limiting tooth groove and the limiting tooth part are adapted.

[0010] As a further improvement of the present utility model, under normal conditions, the groove height of the abutting groove matches the ring height of the limiting ring.

[0011] As a further improvement of the present utility model, under normal conditions, the maximum outer diameter of the helical tooth part is greater than the outer diameter size formed by the middle parts of several protruding parts.

[0012] The present utility model also discloses a floating ball switch, which includes the plug-in type angle-adjustable shaft joint described above, and further includes a floating ball, and the floating ball is connected to the outer end of the fixed arm or the rotating arm.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, when the fixed arm and the rotating arm rotate, the limiting tooth part on the abutting groove of the rotating arm is embedded into the limiting tooth groove on the outer periphery of the limiting ring of the fixed arm, so as to fix the two when the fixed arm and the rotating arm rotate to an appropriate angle. The above-mentioned limiting tooth groove is the gap between two adjacent limiting tooth parts, and the limiting tooth groove and the limiting tooth part are adapted, so that the tooth part will not rotate by itself without external force. Therefore, it can replace the use of bolts to fix the fixed arm and the rotating arm in the traditional technology. However, compared with the bolt fixation, the above solution is more convenient for the user to adjust the angle between the two rotating arms. And in the present utility model, the fixing method between the fixed arm and the rotating arm in the prior art is also changed. The original devices such as the shaft, the limiting cap and the hemispherical fixing head are changed to the limiting member in the present utility model, which greatly reduces the manufacturing cost and the fixing effect is basically the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0016] Figure 2 is a three-dimensional structure schematic diagram of the fixed arm of the present utility model;

[0017] Figure 3 Schematic diagram of the three-dimensional structure of the movable arm of the present utility model;

[0018] Figure 4 Schematic diagram of the side view structure of the movable arm of the present utility model.

[0019] Description of the reference numerals in the figure:

[0020] Float ball 1, fixed arm 2, limit ring 21, limit tooth groove 211, float ball connection part 22, rotating arm 3, limiting member 31, abutting groove 32, limiting tooth part 321. Specific embodiments

[0021] Specific embodiment 1: Please refer to Figure 2-4 The plug-in adjustable-angle shaft joint, including a fixed arm 2 and a rotating arm 3, and the rotating arm 3 is detachably and rotatably connected to the other end of the fixed arm 2.

[0022] The fixed arm 2 includes a limit ring 21, a connecting rod, and a float ball connection part 22. A through hole is provided in the middle of the limit ring 21, and the limit ring 21 is rotatably sleeved on the rotating arm 3. The outer periphery of the limit ring 21 is a smooth surface, and a plurality of circumferentially arranged limit tooth grooves 211 are further provided on the outer periphery of the limit ring 21 along the axial direction. The limit tooth grooves 211 extend from one side to the other side of the outer periphery of the limit ring 21 along the axial direction, and there is a distance between the limit tooth grooves 211 and the other side of the outer periphery of the limit ring 21 along the axial direction. The limit ring 21 is fixedly connected to the upper end of the connecting rod, the lower end of the connecting rod is fixedly connected to the float ball connection part 22, and the limit ring 21, the connecting rod, and the float ball connection part 22 are integrally formed in terms of technology. The upper end of the float ball connection part 22 is fixedly connected to the connecting rod, and the lower end of the float ball connection part 22 is detachably connected to an external component.

[0023] The rotating arm 3 includes a connecting arm, a limiting member 31, and an abutting groove 32. A hole is provided in the connecting arm for connecting an outer component. The limiting member 31 is located at one end of the rotating arm 3 and is located at the end far from the hole in the connecting arm. The limiting member 31 includes a plurality of protruding portions and a plurality of helical tooth portions. The lower end of the protruding portion is fixedly connected to the wall of the rotating arm 3. The helical tooth portion is located at the upper end of the protruding portion and is fixedly connected to the protruding portion. The protruding portion and the helical tooth portion are integrally formed uniformly in the process to form a protruding helical tooth. A plurality of protruding helical teeth are arranged at circumferential intervals so that a circular groove is formed in the middle of the plurality of protruding helical teeth. The end of the protruding portion is fixedly provided with a helical tooth portion; a chamfer is provided on the outer periphery of the helical tooth portion; a limiting rib is provided on the outer periphery of the helical tooth portion. The protruding portion is made of an elastic material to have the ability of elastic deformation towards or away from the center of the circle. The outer diameter of the circular groove matches the inner diameter of the middle through hole of the limiting ring 21 so that the limiting ring 21 can be sleeved on the outside of the limiting member 31. The maximum outer diameter of the helical tooth portion is greater than the outer diameter of the circular groove so that a blocking surface is formed at the connection between the lower end surface of the helical tooth portion and the protruding portion. The limiting member 31 is made of plastic or PC material so that the limiting member 31 has toughness. The helical tooth portion inclines outward along the installation direction of the limiting ring 21 so that the upper end to the lower end of the helical tooth portion can be inserted smoothly along the installation direction of the limiting ring 21. The abutting groove 32 is located at one end of the connecting arm close to the limiting member 31, and the abutting groove 32 is arc-shaped to wrap the outer periphery of the limiting ring 21. The inner arc size of the abutting groove 32 matches the outer periphery size of the limiting ring 21 so that the outer periphery of the limiting ring 21 can abut against the inner wall in the abutting groove 32. A plurality of limiting tooth portions 321 matching the limiting tooth grooves 211 are also provided on the inner wall of the abutting groove 32. The limiting tooth grooves 211 are the gaps between two adjacent limiting tooth portions 321, and the limiting tooth grooves 211 and the limiting tooth portions 321 are adapted so that the tooth portion will not rotate along the tooth groove by itself without external force. The groove height of the abutting groove 32 matches the ring height of the limiting ring 21 so that the limiting ring 21 can be completely abutted in the abutting groove 32. The height of the protruding portion in the limiting member 31 matches the height of the inner through hole of the limiting ring 21 so that the limiting ring 21 can be completely sleeved on the limiting member 31 for limiting. In this solution, two limiting tooth portions 321 are provided, respectively located at the head and the end of the abutting groove 32. It should be noted here that the matching manner of the limiting tooth grooves 211 and the limiting tooth portions 32 in this solution is the same as the matching manner of the patent mentioned in the background art, and will not be elaborated here.

[0024] Working principle:

[0025] When this solution is in use, first detachably connect the floating ball to the floating ball connecting part, and the floating ball connecting part is located on the fixed arm. Then, pass the limiting part protruding from the rotating arm through the middle through hole of the limiting ring to sleeved the limiting ring on the limiting part. The limiting part has toughness, so that when the limiting ring abuts against the upper end inclined tooth part of the limiting part, the protruding part can be deformed due to the following force, and the limiting ring can be slid onto the limiting part. After entering, the protruding part returns to its initial state, and the connecting ring is limited and clamped by the blocking surface formed at the connection between the inclined tooth part and the protruding part. At the same time, the limiting tooth groove on the fixed arm and the limiting tooth part on the rotating arm are matched and abutted against each other to complete the limitation between the fixed arm and the rotating arm. Finally, since the limiting ring is sleeved on the limiting part and does not affect the rotation of the rotating arm or the fixed arm, the angle can be adjusted.

[0026] Specific Embodiment 2: Please refer to Figure 1 the float switch, which is mainly used in the field of water purifiers. The float switch includes the shaft joint and the floating ball mentioned in Embodiment 1. Among them, the floating ball is connected to the outer end of the fixed arm 2 or the rotating arm 3, and the rotating arm without the floating ball is connected with a float switch. Workers control the water level by adjusting the position of the floating ball.

Claims

1. A plug-in type angle-adjustable shaft joint, comprising a fixed arm (2) and a rotating arm (3); characterized in that: A plurality of protrusions are provided at one end of the rotating arm (3) close to the fixed arm (2) and are distributed at intervals around the circumference; the protrusions are made of elastic material so as to have the ability to elastically deform towards or away from the center of the circle; the ends of the protrusions are fixedly provided with oblique teeth; the outer circumference of the oblique teeth is provided with a chamfer; and the outer circumference of the oblique teeth is provided with a limiting convex strip; A limiting ring (21) is provided at one end of the fixed arm (2) close to the rotating arm (3); the inner diameter of the limiting ring (21) is smaller than the outer diameter formed by the plurality of limiting convex strips in a normal state; in a normal state, the outer diameter formed by the middle parts of the plurality of protrusions matches the inner diameter of the limiting ring (21); the length of the protrusion matches the thickness of the limiting ring (21); during installation, the abutting surface of the limiting convex strips presses against the end surface of the limiting ring (21).

2. The plug-in angle-adjustable shaft joint according to claim 1, characterized in that: The limiting ring (21) is rotatably sleeved on the rotating arm (3); a plurality of circumferentially arranged limiting tooth grooves (211) are provided on the outer periphery of the limiting ring (21) along the axial direction; the limiting tooth grooves (211) extend from one side of the outer periphery of the limiting ring (21) along the axial direction to the other side; and there is a spacing between the limiting tooth grooves (211) and the other side of the outer periphery of the limiting ring (21) along the axial direction.

3. The plug-in angle-adjustable shaft joint according to claim 2, characterized in that: The fixed arm (2) further comprises a connecting rod and a floating ball connecting part (22); the limiting ring (21) is fixedly connected to the upper end of the connecting rod; the lower end of the connecting rod is fixedly connected to the floating ball connecting part (22); the limiting ring (21), the connecting rod and the floating ball connecting part (22) are integrally formed; the upper end of the floating ball connecting part (22) is fixedly connected to the connecting rod; and the lower end of the floating ball connecting part (22) is detachably connected to an external connection piece.

4. The plug-in angle-adjustable shaft joint according to claim 2, characterized in that: The abutment groove (32) is located at one end of the connecting arm close to the limiting member (31), and the abutment groove (32) is arc-shaped to wrap around the outer circumference of the limiting ring (21); the inner arc size of the abutment groove (32) matches the outer circumference size of the limiting ring (21); the inner wall of the abutment groove (32) is also provided with a plurality of limiting tooth portions (321) that match the limiting tooth grooves (211); the limiting tooth grooves (211) are gaps between two adjacent limiting tooth portions (321), and the limiting tooth grooves (211) and the limiting tooth portions (321) are adapted to each other.

5. The plug-in angle-adjustable shaft joint according to claim 4, characterized in that: Under normal conditions, the groove height of the abutment groove (32) and the ring height of the limiting ring (21) match each other.

6. The plug-in angle-adjustable shaft joint according to claim 1, characterized in that: Under normal conditions, the maximum outer diameter of the helical tooth portion is greater than the outer diameter formed by the middle portions of the plurality of protrusions.

7. A float switch, comprising the plug-in angle-adjustable shaft joint according to any one of claims 1 to 6, characterized in that: A floating ball (1) is also provided, and the floating ball (1) is connected to the outer end of the fixed arm (2) or the rotating arm (3).

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