CN213748612U

CN213748612U - Large meter movement

Info

Publication number: CN213748612U
Application number: CN202023226117.1U
Authority: CN
Inventors: 张新忠; 金林峰; 李磊; 孙雪海
Original assignee: Wenling Younio Water Meter Co ltd
Current assignee: Wenling Younio Water Meter Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-07-20
Anticipated expiration: 2030-12-28

Abstract

The utility model belongs to the technical field of water gauge equipment, concretely relates to big table core. The problem that the assembly precision between an existing impeller and a shell is not high is solved. This big table core, which comprises a housin, the casing includes preceding shell and backshell, and the internal rotation of casing is connected with the impeller, its characterized in that, the recess is provided with the constant head tank on the inner wall of backshell, and the protrusion is provided with the location lug with constant head tank matched with on the lateral wall of preceding shell, has seted up preceding mounting hole on the preceding shell, has seted up the back mounting hole on the backshell, be equipped with the pivot that runs through the impeller on the impeller, and peg graft respectively in preceding mounting hole and back mounting hole in the both ends of pivot. The utility model provides high assembly precision between impeller and the casing.

Description

Large meter movement

Technical Field

The utility model belongs to the technical field of water gauge equipment, concretely relates to big table core.

Background

The water meter is a flow meter which calculates the volume of water flowing through a tap water pipe by using the direct mechanical movement process of a movable wall volume measuring chamber or the action of the flow rate of water on a wing wheel.

The spiral-wing type water meter belongs to the speed type water meter, including three categories of horizontal spiral-wing type (turbine type water meter), vertical spiral-wing type and detachable horizontal spiral-wing type. When water flows into the water meter, the spiral blade type impeller of the water meter is impacted along the axial direction to rotate and then flows out, the rotating speed of the impeller is in direct proportion to the water flow speed, and the total amount of the water passing through the water meter is displayed on the indicating device after the water is transmitted by the reduction gear.

For example, chinese patent application No. 201320503393.9 discloses a spiral wing type water meter movement, wherein a housing of the movement has a three-stage structure, an impeller is connected to the housing through a pin connected to the housing, a front housing is connected to a middle housing, and the middle housing is connected to a rear housing, so that two assembly errors are generated, and the two assembly errors are accumulated in the assembly between the impeller and the housing, resulting in the reduction of the assembly accuracy between the impeller and the housing.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a big table core, the utility model aims to solve the technical problem that: how to improve the assembly accuracy between the impeller and the casing.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a big table watch movement, includes the casing, the casing includes preceding shell and backshell, and the rotation is connected with the impeller in the casing, its characterized in that, the recess is provided with the constant head tank on the inner wall of backshell, and the protrusion is provided with the location lug with constant head tank matched with on the lateral wall of preceding shell, has seted up preceding mounting hole on the preceding shell, has seted up the back mounting hole on the backshell, be equipped with the pivot that runs through the impeller on the impeller, and peg graft respectively in preceding mounting hole and back mounting hole in the both ends of pivot.

The casing in the big table core adopts and is connected between preceding shell and the backshell, when assembling with the impeller, the impeller is connected in the mounting hole and the back mounting hole in the front through the pivot, compare the housing connection of syllogic among the prior art, the concentricity between preceding mounting hole on the casing and the back mounting hole obtains promoting in this big table core, and the constant head tank cooperation that sets up on the locating lug that sets up on the preceding shell and the backshell, assembly precision between casing and the backshell before further promotion, thereby improve the assembly precision between impeller and the casing.

In the watch movement, the inner wall of the back shell is provided with a plurality of positioning grooves at intervals along the circumferential direction, the outer side wall of the front shell is provided with a plurality of positioning lugs at intervals along the circumferential direction, and the plurality of positioning grooves are in one-to-one correspondence with the plurality of positioning lugs and are matched with the positioning lugs. A plurality of constant head tank that sets up on the backshell cooperates one by one with a plurality of location lug that sets up on the preceding shell, and the assembly precision between shell and the backshell before further promotion, the concentricity between preceding mounting hole and the back mounting hole obtains promoting to improve the assembly precision between impeller and the casing.

In the watch movement, the peripheral wall of the front shell is provided with a limiting convex rib along the circumferential direction of the front shell, and the limiting convex rib abuts against the end face of the rear shell. The setting of spacing protruding muscle can prevent to pass through between preceding shell and the backshell and peg graft, promotes the assembly precision between pivot and preceding shell, the backshell.

In the watch movement, the front mounting hole is internally provided with a first bushing, and one end of the rotating shaft is inserted into the first bushing. The first bushing can reduce friction between the rotating shaft and the front mounting hole.

In the watch movement, a second bushing is arranged in the rear mounting hole, and the other end of the rotating shaft is inserted into the second bushing. The friction between the rotating shaft and the rear mounting hole can be reduced due to the arrangement of the second bushing.

In the watch movement, the first bushing is internally provided with a first through hole into which the rotating shaft can be inserted, and the first through hole is in a conical hole shape with the outer end aperture larger than the inner end aperture towards the inserting direction of the rotating shaft. The first through hole is in a conical hole shape with the outer end aperture larger than the inner end aperture towards the insertion direction of the rotating shaft, so that the rotating shaft can be conveniently inserted.

In the watch movement, the second bushing is internally provided with a second through hole into which the rotating shaft can be inserted, and the second through hole is in a conical hole shape with the outer end aperture larger than the inner end aperture towards the inserting direction of the rotating shaft. The second through hole is in a conical hole shape with the outer end aperture larger than the inner end aperture towards the insertion direction of the rotating shaft, so that the rotating shaft can be conveniently inserted.

Compared with the prior art, the large watch movement has the following advantages:

through preceding shell is direct to be connected with the backshell, can promote the concentricity between preceding mounting hole and the back mounting hole, and then improve the assembly precision between impeller and the casing.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is a schematic diagram of the explosion structure of the present invention.

Fig. 3 is a cross-sectional view of the present invention.

In the figure, 1, a housing; 1a, a front shell; 1a1, positioning lug; 1a2, front mounting hole; 1a3, a limiting convex rib; 1b, a rear shell; 1b1, positioning groove; 1b2, rear mounting holes; 2. an impeller; 3. a rotating shaft; 4. a first bushing; 4a, a first through hole; 5. a second bushing; 5a and a second through hole.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 3, the large watch movement includes a housing 1, and an impeller 2 is rotatably connected to the housing 1. Wherein casing 1 includes preceding shell 1a and backshell 1b, preceding shell 1a directly links to each other with backshell 1b, preceding shell 1a is connected with backshell 1b and is formed the cavity that is used for holding impeller 2, preceding shell 1a is cylindricly with backshell 1b department of linking, it is provided with location lug 1a1 to bulge along its circumference interval on the lateral wall of preceding shell 1a, location lug 1a1 is the cuboid form, be equipped with constant head tank 1b1 along its circumference on the inside wall of backshell 1b, a plurality of constant head tank 1b1 and a plurality of constant head tank 1a1 one-to-one and mutually support and insert. The number of the positioning protrusions 1a1 can be 3, 4 or 5, and the number of the positioning grooves 1b1 is the same as that of the positioning blocks.

Specifically, as shown in fig. 1 to 3, a limiting rib 1a3 is provided on the outer peripheral wall of the front shell 1a in a protruding manner along the circumferential direction thereof, and the limiting rib 1a3 abuts against the end face of the rear shell 1 b. The arrangement of the limiting convex rib 1a3 can prevent the transition splicing between the front shell 1a and the rear shell 1b, and improve the assembly precision between the rotating shaft 3 and the front shell 1a and the rear shell 1 b.

Further, as shown in fig. 1 to 3, a positioning groove 1b1 is formed at the top of the rear case 1b, a first mounting hole communicated with the positioning groove 1b1 is formed at the top of the rear case 1b, a positioning protrusion 1a1 is formed at the top of the front case 1a, and a second mounting hole communicated with the first mounting hole is formed in the positioning protrusion 1a 1. The front shell 1a and the rear shell 1b are connected through fasteners, and the fasteners penetrate through the first mounting holes and the second mounting holes to connect the front shell 1a and the rear shell 1b together.

As shown in fig. 1 to 3, a front mounting hole 1a2 is opened on the front casing 1a, a rear mounting hole 1b2 is opened on the rear casing 1b, a rotating shaft 3 penetrating the impeller 2 is provided on the impeller 2, and two ends of the rotating shaft 3 are respectively connected with the inside of the front mounting hole 1a2 and the inside of the rear mounting hole 1b 2.

Further, as shown in fig. 1 to 3, a first bushing 4 is disposed in the front mounting hole 1a2, the first bushing 4 has a first through hole 4a into which the rotating shaft 3 can be inserted, the first through hole 4a is in a conical hole shape with an outer end aperture larger than an inner end aperture toward the inserting direction of the rotating shaft 3, one end of the rotating shaft 3 is inserted into the first bushing 4, and the first through hole 4a is in a conical hole shape with an outer end aperture larger than an inner end aperture toward the inserting direction of the rotating shaft 3, so as to facilitate the inserting of the rotating shaft 3. The rotating shaft 3 is connected with the first bushing 4 in a tight fit manner, the first bushing 4 is arranged to reduce friction between the rotating shaft 3 and the front mounting hole 1a2,

further, as shown in fig. 1 to 3, a second bushing 5 is disposed in the rear mounting hole 1b2, the second bushing 5 has a second through hole 5a for inserting the rotating shaft 3, the second through hole 5a is in a conical hole shape with an outer end aperture larger than an inner end aperture toward the inserting direction of the rotating shaft 3, and the second through hole 5a is in a conical hole shape with an outer end aperture larger than an inner end aperture toward the inserting direction of the rotating shaft 3, so as to facilitate the inserting of the rotating shaft 3. The other end of the rotating shaft 3 is inserted into the second bushing 5, the rotating shaft 3 and the second bushing 5 are connected in a tight fit mode, and friction between the rotating shaft 3 and the rear mounting hole 1b2 can be reduced due to the arrangement of the second bushing 5.

As shown in fig. 1 to 3, the case 1 in the watch movement is connected between the front case 1a and the rear case 1b, and when the case 1 is assembled with the impeller 2, the impeller 2 is connected in the front mounting hole 1a2 and the rear mounting hole 1b2 through the rotating shaft 3, compared with the case 1 in the prior art, in the watch movement, the concentricity between the front mounting hole 1a2 and the rear mounting hole 1b2 is improved, and the positioning bump 1a1 arranged on the front case 1a is matched with the positioning groove 1b1 arranged on the rear case 1b, so that the assembly precision between the front case 1a and the rear case 1b is further improved, and the assembly precision between the impeller 2 and the case 1 is improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a big table core, includes casing (1), casing (1) is including preceding shell (1a) and backshell (1b), and casing (1) internal rotation is connected with impeller (2), its characterized in that, it is provided with constant head tank (1b1) to indent on the inner wall of backshell (1b), and the protrusion is provided with on the lateral wall of preceding shell (1a) with constant head tank (1b1) matched with location lug (1a1), has seted up preceding mounting hole (1a2) on preceding shell (1a), has seted up back mounting hole (1b2) on backshell (1b), be equipped with pivot (3) that run through impeller (2) on impeller (2), and peg graft respectively in preceding mounting hole (1a2) and in back mounting hole (1b2) the both ends of pivot (3).

2. The watch movement according to claim 1, wherein the inner wall of the back case (1b) is provided with a plurality of positioning grooves (1b1) at intervals along the circumferential direction thereof, the outer side wall of the front case (1a) is provided with a plurality of positioning protrusions (1a1) at intervals along the circumferential direction thereof, and the plurality of positioning grooves (1b1) and the plurality of positioning protrusions (1a1) are in one-to-one correspondence and are mutually matched.

3. The watch movement according to claim 2, wherein a limiting rib (1a3) is convexly arranged on the outer circumferential wall of the front case (1a) along the circumferential direction thereof, and the limiting rib (1a3) abuts against the end face of the rear case (1 b).

4. The watch movement according to claim 1, 2 or 3, wherein a first bush (4) is arranged in the front mounting hole (1a2), and one end of the rotating shaft (3) is inserted into the first bush (4).

5. The watch movement according to claim 1, 2 or 3, wherein a second bushing (5) is arranged in the rear mounting hole (1b2), and the other end of the rotating shaft (3) is inserted into the second bushing (5).

6. The watch movement according to claim 4, wherein the first bushing (4) has a first through hole (4a) into which the rotating shaft (3) can be inserted, and the first through hole (4a) is in a conical hole shape with an outer end aperture larger than an inner end aperture towards the insertion direction of the rotating shaft (3).

7. The watch movement according to claim 5, wherein the second bushing (5) has a second through hole (5a) into which the rotating shaft (3) can be inserted, and the second through hole (5a) is in a conical hole shape with an outer end aperture larger than an inner end aperture towards the insertion direction of the rotating shaft (3).