CN219997485U

CN219997485U - Mechanical timer for controlling star-delta conversion time

Info

Publication number: CN219997485U
Application number: CN202320848432.2U
Authority: CN
Inventors: 周文明
Original assignee: Chengde Ruiqiao Water Supply Equipment Co ltd
Current assignee: Chengde Ruiqiao Water Supply Equipment Co ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-11-10
Anticipated expiration: 2033-04-17

Abstract

The utility model discloses a mechanical timer for controlling star-delta conversion time, which comprises the following steps: the device comprises a spring, a main shaft big gear, a transmission gear set, a counterweight gear set, a bayonet lever and a main shaft; the two ends of the main shaft are a main shaft B end and a main shaft A end respectively, a spring is arranged at the main shaft B end, a bayonet lever is arranged at the main shaft A end, and the spring is in torsion fit with the bayonet lever; the drive gear set includes a plurality of sub-speed gear sets including at least: a first speed gear set comprising: a fixed one-way ratchet wheel and a variable output large gear; the rotatable direction of the unidirectional ratchet wheel is the same as the tightening direction of the spring; the main shaft is fixedly connected with a main shaft big gear, the main shaft big gear is meshed with a unidirectional ratchet wheel, and the unidirectional ratchet wheel is fixedly connected with a variable output big gear; the counterweight gear set includes: the output end of the transmission gear set is meshed with the counterweight driven pinion. The scheme can accurately time within 2-15 seconds, and the accuracy is controlled to be plus or minus 5%.

Description

Mechanical timer for controlling star-delta conversion time

Technical Field

The utility model relates to the technical field of fire-fighting machinery emergency devices, in particular to a mechanical timer for controlling star-delta conversion time.

Background

At present, the shortest time of the plastic mechanical timer applied in China is 60 seconds, the precision is plus or minus 5%, when the time is needed within 2-15 seconds, an electronic timer is generally adopted, the influence of humidity and temperature on the plastic mechanical timer in the use process is large, the influence of humidity and temperature on the plastic mechanical timer is very small and negligible, and no precedent for successful development of the timer within 2-15 seconds is available at home and abroad.

Disclosure of Invention

In view of this, the present utility model provides a mechanical timer for controlling the star-delta time, which can be used in fire-fighting machinery emergency devices to accurately control the star-delta time and complete the star-delta power.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a mechanical timer for controlling star-to-angle transition time, comprising: the device comprises a spring, a main shaft big gear, a transmission gear set, a counterweight gear set, a bayonet lever and a main shaft;

the two ends of the main shaft are a main shaft B end and a main shaft A end respectively, the spring is arranged at the main shaft B end, the bayonet lever is arranged at the main shaft A end, and the spring is in torsion fit with the bayonet lever;

the transmission gear set comprises a plurality of sub-speed gear sets, and at least comprises: a first speed gearset, the first speed gearset comprising: a fixed one-way ratchet wheel and a variable output large gear; the rotatable direction of the unidirectional ratchet wheel is the same as the tightening direction of the spring;

the main shaft is fixedly connected with the main shaft big gear, the main shaft big gear is meshed with the unidirectional ratchet wheel, and the unidirectional ratchet wheel is fixedly connected with a variable output big gear;

the counterweight gearset includes: the output end of the transmission gear set is meshed with the counterweight driven pinion.

Preferably, the transmission ratio of the main shaft big gear to the unidirectional ratchet wheel is 8.5:1.

preferably, the sub-speed gear sets and the counterweight gear sets are arranged along the circumferential direction of the main shaft, and the first speed gear set and the counterweight gear sets are respectively positioned at two radial sides of the main shaft.

Preferably, the transmission gear set includes at least: a second speed gearset, the second speed gearset comprising: the fixed connection of the two variable output large gears and the two variable driven small gears;

the first variable output large gear is meshed with the second variable driven small gear.

Preferably, the transmission ratio of the first variable output large gear to the second variable driven small gear is 9.25:1.

preferably, the transmission gear set includes at least: a third speed gearset, the second speed gearset comprising: the three-variable output large gear and the three-variable driven small gear are fixedly connected;

the second variable output large gear is meshed with the third variable driven small gear, and the third variable output large gear is meshed with the counterweight driven small gear.

Preferably, the transmission ratio of the second variable output large gear to the third variable driven small gear is 8.75:1, the transmission ratio of the three-variable output large gear to the balance weight driven small gear is 8.5:1.

preferably, the first speed change gear set, the second speed change gear set, the third speed change gear set and the counterweight gear set are sequentially arranged along the circumferential direction of the main shaft, and the first speed change gear set and the counterweight gear set are respectively positioned at two radial sides of the main shaft.

Preferably, the maximum rotation angle of the bayonet lever is 315 DEG

According to the technical scheme, the mechanical timer for controlling the star-delta conversion time provided by the utility model can successfully solve the problem that the plastic timer can accurately time within 2-15 seconds, and the accuracy is controlled to be plus or minus 5%.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a tangent structure of a mechanical timer for controlling star-delta transition time according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an A-end top view structure of a mechanical timer for controlling star-delta transition time according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram showing a B-side top view of a mechanical timer for controlling star-delta transition time according to an embodiment of the present utility model

Fig. 4 is a schematic diagram of a side-cut structure of a mechanical timer for controlling star-delta conversion time according to an embodiment of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but 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.

A mechanical timer for controlling star-to-angle transition time, comprising: 1: spring, 2: main shaft big gear, 3, first speed change gear set (including 3-1 unidirectional ratchet wheel, 3-2 first variable output big gear) 4 second speed change gear set (including 4-1 second variable output big gear, 4-2 second variable driven small gear), 5: the third speed change gear set (comprising a 5-1 three-variable output large gear and a 5-2 three-variable driven small gear) is provided with a 6-counterweight gear set (comprising a 6-1 counterweight driven small gear and a 6-2 counterweight wheel), a 7-bayonet lever and an 8-spindle (comprising an 8-1 spindle A end and an 8-2 spindle B end).

The working principle is that the tightening preparation process comprises the following steps: the end B of the 8-1 main shaft rotates anticlockwise, as shown in figures 1 and 3, the 2 main shaft big gear is driven to rotate and simultaneously the 1 spring is enabled to store energy, and the 2 main shaft big gear drives the 3-1 unidirectional ratchet wheel to rotate; as shown in fig. 2 and 4, the 3-2 first-variable output large gear is fixed and drives the 8-2 main shaft A end and the 7-bayonet lever to rotate anticlockwise; as shown in fig. 2, the raised head part of the end A of the 8-2 main shaft is propped against the upper part of the right side shell of the main shaft, so that the original potential energy of the 1 spring is not zero, and a certain potential energy is maintained; the end A of the 8-2 spindle rotates 315 degrees anticlockwise and then touches the lower part of the shell to automatically limit.

Then, the timing implementation process is: the end B of the 8-1 main shaft is loosened, the 1 spring starts to release energy to drive the 2 main shaft big gear to rotate, the 2 main shaft big gear drives the 3-1 unidirectional ratchet wheel to move, and the ratchet wheel drives the 3-2 first variable speed output big gear to rotate, wherein: the transmission ratio of the 2 main shaft big gear to the 3-1 unidirectional ratchet wheel is 8.5:1. Simultaneously, the 3-2 first variable speed output big gear drives the 4-2 second variable driven small gear to rotate; wherein the transmission ratio of the 3-2 first variable speed output big gear to the 4-2 second variable driven small gear is 9.25:1. Meanwhile, the 4-1 second variable output big gear drives the 5-2 third variable driven small gear to rotate, wherein the transmission ratio of the 4-1 second variable output big gear to the 5-2 third variable driven small gear is 8.75:1. Meanwhile, the 5-1 three-variable output big gear drives the 6-1 balance weight driven small gear to rotate, wherein the transmission ratio of the 5-1 three-variable output big gear to the 6-1 balance weight driven small gear is 8.5:1. And simultaneously, the 6-2 counterweight wheel rotates. And simultaneously, the end A of the 8-2 main shaft rotates clockwise.

Wherein, 7 bayonet levers make 1 clockwork spring keep certain torsion and make main shaft B end maximum rotation angle 315 in addition. The self structure of the 7 bayonet lever corresponds to an acute angle of 60 degrees, and is automatically blocked when the angle reaches 315 degrees. When the 8-1 main shaft B end rotates 315 degrees anticlockwise, the main shaft B end is released, the clockwise return time of the main shaft A end is 15 seconds, and the output torque is 2 KG/N. When the 8-1 main shaft end B rotates 90 degrees anticlockwise, the main shaft end B is released, the clockwise return time of the main shaft end A is 5 seconds, and the output torque is 3 KG/N.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. Similar or imitative to the product, the time is infringed as long as the product is used for a fire-fighting machinery emergency device to control the time.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mechanical timer for controlling star-to-angle transition time, comprising: a spring (1), a main shaft big gear (2), a transmission gear set, a counterweight gear set (6), a bayonet lever (7) and a main shaft (8);

the two ends of the main shaft (8) are a main shaft B end (8-1) and a main shaft A end (8-2) respectively, the spring (1) is arranged at the main shaft B end (8-1), the bayonet lever (7) is arranged at the main shaft A end (8-2), and the spring (1) is in torsion fit with the bayonet lever (7);

the transmission gear set comprises a plurality of sub-speed gear sets, and at least comprises: a first speed gearset (3), the first speed gearset (3) comprising: a fixed one-way ratchet wheel (3-1) and a variable output large gear (3-2); the rotatable direction of the unidirectional ratchet wheel (3-1) is the same as the tightening direction of the spring (1);

the main shaft (8) is fixedly connected with the main shaft big gear (2), the main shaft big gear (2) is meshed with the unidirectional ratchet wheel (3-1), and the unidirectional ratchet wheel (3-1) is fixedly connected with a variable output big gear (3-2);

the counterweight gearset (6) comprises: the output end of the transmission gear set is meshed with the counterweight driven pinion (6-1).

2. The mechanical timer for controlling star-delta transition time according to claim 1, characterized in that the transmission ratio of the main shaft gearwheel (2) to the unidirectional ratchet (3-1) is 8.5:1.

3. the mechanical timer for controlling a star-delta transition time according to claim 1, wherein the sub-speed gear sets and the weight gear sets (6) are arranged along the circumferential direction of the main shaft (8), and the first speed gear set (3) and the weight gear sets (6) are located on both radial sides of the main shaft (8), respectively.

4. The mechanical timer for controlling star-delta transition time of claim 1, wherein the drive gear set comprises at least: a second speed gear set (4), the second speed gear set (4) comprising: a fixedly connected two-variable output large gear (4-1) and two-variable driven small gears (4-2);

the primary output large gear (3-2) is meshed with the secondary driven small gear (4-2).

5. The mechanical timer for controlling star-delta transition time according to claim 4, characterized in that the transmission ratio of the primary output gearwheel (3-2) to the secondary driven pinion (4-2) is 9.25:1.

6. the mechanical timer for controlling star-delta transition time as set forth in claim 4, wherein said drive gear set comprises at least: a third speed gear set (5), the second speed gear set (4) comprising: a three-variable output large gear (5-1) and a three-variable driven small gear (5-2) which are fixedly connected;

the second variable output large gear (4-1) is meshed with the third variable driven small gear (5-2), and the third variable output large gear (5-1) is meshed with the balance weight driven small gear (6-1).

7. The mechanical timer for controlling star-delta transition time according to claim 6, characterized in that the transmission ratio of the two-variable output gearwheel (4-1) to the three-variable driven pinion (5-2) is 8.75:1, the transmission ratio of the three-variable output large gear (5-1) to the balance weight driven small gear (6-1) is 8.5:1.

8. the mechanical timer for controlling a star-delta transition time according to claim 6, wherein the first speed gear set (3), the second speed gear set (4), the third speed gear set (5) and the weight gear set (6) are sequentially arranged along the circumferential direction of the main shaft (8), and the first speed gear set (3) and the weight gear set (6) are respectively located on both radial sides of the main shaft (8).

9. Mechanical timer controlling star-angle transition time according to claim 6, characterized in that the maximum rotation angle of the bayonet lever (7) is 315 °.