CN215429666U

CN215429666U - Spray head for automobile hub paint spraying

Info

Publication number: CN215429666U
Application number: CN202121152642.5U
Authority: CN
Inventors: 方钧; 严月超; 贺小平
Original assignee: Yichang Fuqiang Auto Parts Co ltd
Current assignee: Yichang Fuqiang Auto Parts Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-01-07
Anticipated expiration: 2031-05-26

Abstract

The utility model discloses a spray head for spraying paint on an automobile hub, which comprises a spray head body and a paint guide pipe detachably connected with the spray head body, wherein a plurality of first liquid spraying holes are formed in the liquid spraying surface of the spray head body, an adjusting plate is rotatably attached to the liquid spraying surface of the spray head body, a plurality of second liquid spraying holes matched with the first liquid spraying holes one by one are formed in the adjusting plate, and the adjusting plate is rotated to enable each first liquid spraying hole and the second liquid spraying hole matched with the first liquid spraying hole to be completely communicated or the holes to be staggered so as to be locally communicated. Compared with the prior art, the utility model can adjust the paint outlet flow during paint spraying, is convenient for the operation of workers and saves time.

Description

Spray head for automobile hub paint spraying

Technical Field

The utility model relates to the technical field of paint spraying devices, in particular to a spray head for spraying paint on an automobile hub.

Background

After the automobile hub is used for a long time, the hub can generate a yellow corrosion phenomenon, so that the appearance is influenced, the use performance of the hub is seriously influenced, the service life of the hub is shortened, and the hub is sprayed with paint to be repaired as soon as possible; the spray painting refers to spray painting, which is dispersed into uniform and fine fog drops by a spray gun or a butterfly type atomizer with the help of pressure or centrifugal force, and the fog drops are applied to the surface of the automobile hub to prevent the automobile hub from yellowing and rotting or repairing and prolong the service life of the automobile hub.

The existing automatic paint spraying device for the automobile hub cannot adjust the spraying amount during spraying, so that the spray head needs to be frequently replaced, and a lot of inconvenience is caused in the using process, therefore, the provision of the adjustable spray head is particularly necessary.

SUMMERY OF THE UTILITY MODEL

Aiming at the problem that the spray head in the prior art cannot adjust the sprayed fluid amount during paint spraying, the utility model aims to provide the spray head capable of adjusting the sprayed fluid amount so as to solve the problem that the fluid amount cannot be adjusted in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a shower nozzle that automobile wheel hub sprays paint, includes the shower nozzle body and can dismantle the lacquer pipe of being connected with the shower nozzle body, seted up a plurality of first hydrojet holes on the liquid spray face of shower nozzle body, it has the regulating plate to rotate the laminating on the hydrojet face of shower nozzle body, has seted up a plurality of and first hydrojet hole a plurality of second hydrojet holes of one-to-one complex on the regulating plate, rotates the regulating plate and makes every first hydrojet hole and rather than the second hydrojet hole of complex complete switch-on or the hole is crisscross to switch on with the part.

The working principle is as follows: when a large-area fluid volume needs to be sprayed, a worker rotates the adjusting plate to enable the first fluid spraying holes and the second fluid spraying holes to be completely aligned and communicated, and the fluid can be sprayed out through the first fluid spraying holes and the second fluid spraying holes to act on a wheel hub; when a small-area fluid volume needs to be sprayed, a worker rotates the adjusting plate to enable the first liquid spraying holes and the second liquid spraying holes to be correspondingly communicated in a staggered mode one by one, and the holes are formed in a staggered mode to be adjusted to be small in flow for paint spraying processing; the adjustment of the spray head between large flow and small flow can be realized by rotating the adjusting plate so as to meet the use requirement.

Compared with the prior art, the utility model has the following beneficial effects: this automobile wheel hub's shower nozzle rotates through the hydrojet face at the shower nozzle body and connects an regulating plate, and the staff can rotate the regulating plate and make and align whole the switching on of a plurality of second hydrojet holes on through the regulating plate and a plurality of first hydrojet holes on the hydrojet face and spout large tracts of land fluid volume or the crisscross part of hole switches on the part and aligns the small-area fluid volume of spouting and act on wheel hub, and the staff need not change the shower nozzle and can realize adjusting the fluid volume size when needing adjusting the fluid volume, makes the remote operation of staff more convenient.

Preferably, the paint guide pipe comprises an inner rod with a larger diameter and a joint pipe which is fixedly connected with the inner rod and has a smaller diameter, the diameter of the joint end of the spray head body is larger than that of the joint pipe and is detachably connected with the joint pipe, and a protective cover is slidably sleeved on the joint pipe; when the joint end on the nozzle body is connected with the joint pipe, the elastic clamping assembly arranged on the joint pipe is fixed on the protective cover by the force generated by the movement of the joint end on the nozzle body along the outer wall of the joint pipe.

Through adopting above-mentioned technical scheme, because the theory of operation of paint is when the blowout is even and tiny fog drop form is wafted and is dispersed to the air, the staff can receive certain injury when carrying out the work of spraying paint, is close shower nozzle body department at the pipe of leading the lacquer and installs a protection casing and can reduce the injury to the staff health.

Preferably, the protection casing is hemispherical, and is provided with an opening on the surface thereof, the opening is convenient for passing through the joint pipe, the elastic clamping assembly comprises an annular limiting table formed at the joint of the liquid guide pipe and the joint pipe and two elastic pieces hinged on the outer wall of the joint pipe, the opening on the surface of the protection casing is abutted between the annular limiting table and the elastic pieces, and the joint pipe pushes the non-hinged end of the elastic pieces to move in the direction away from the wall of the joint pipe to compress and fix the protection casing when the joint end of the nozzle body is inserted into the joint end of the nozzle body and connected with the joint end.

Through adopting above-mentioned technical scheme, the protection casing butt is in the contained angle department of annular spacing platform to compress tightly it through the flexure strip but can rotate as required, rotatory protection casing was observed when being convenient for the staff need observe the hydrojet situation, is favorable to the staff to operate.

Preferably, one side of each elastic sheet close to the joint pipe is fixedly provided with a stop block for preventing the elastic sheet from being attached to the joint pipe.

By adopting the technical scheme, when the joint pipe is inserted into the joint of the spray head body, the elastic sheet is pushed by the joint of the spray head body and is opened in the direction away from the side wall of the joint pipe, and the abutting stop block is fixedly arranged on the surface of the elastic sheet close to one side of the joint pipe, so that a certain distance is reserved between the elastic sheet and the joint pipe, and the joint pipe and the spray head body can be connected more conveniently by workers.

Preferably, the liquid spraying surface of the sprayer body is provided with annular clamping grooves which are arranged outside the first liquid spraying holes, and the adjusting plate is connected with an annular clamping block which is rotatably clamped in the annular clamping grooves.

By adopting the technical scheme, the annular clamping block on the adjusting plate can be inserted into the annular clamping groove, so that the adjusting plate is tightly attached to the liquid spraying surface of the sprayer body, and the possibility of liquid leakage is reduced.

Preferably, the circumferential side surface of the adjusting plate is fixedly connected with an adjusting rod, the side surface of the spray head body, which is close to the spray surface of the spray head body, is connected with two first limiting columns which are arranged at intervals, and the adjusting rod is positioned between the two limiting columns to move; when the adjusting rod is abutted against any limiting column, each first liquid spraying hole and the second liquid spraying hole matched with the first liquid spraying hole are conducted completely or are conducted locally in a staggered mode.

Through adopting above-mentioned technical scheme, it is more convenient when installing an regulation pole on the regulating plate and can making the staff rotate the regulating plate, it pulls between two first spacing posts to adjust the pole, pull and make a plurality of first hydrojet holes and a plurality of second hydrojet hole align completely when to one of them first spacing post, it can be spacing so that reduce to rock to adjust the pole when being close to one of them first spacing post, it partially switches on to make first hydrojet hole and second hydrojet hole staggered portion overlap when pulling to the first spacing post of opposite side, it can reduce to rock to adjust the pole when the first spacing post of opposite side is spacing.

Preferably, the liquid sending pipe further comprises an outer pipe which is sleeved at one end of the inner pipe in a sliding mode, one end, far away from the outer pipe, of the inner pipe is connected with the connector of the sprayer body, and a locking structure used for controlling the relative movement state of the inner pipe and the outer pipe is arranged between the inner pipe and the outer pipe.

By adopting the technical scheme, the inner pipe sleeve is arranged in the inner cavity of the outer pipe and is in sliding connection with the outer pipe, and when the height of the liquid sending pipe needs to be adjusted by a worker, the inner pipe is pulled to slide in the outer pipe, so that the height of the liquid sending pipe can be adjusted.

Preferably, the locking structure includes that it has a plurality of first spacing grooves along its axial direction equipartition on the outer tube inner wall, and first spacing groove opening all is towards the inner chamber, has seted up the second spacing groove on the outside lateral wall of inner tube, and the opening of second spacing groove is towards the outer tube, and there is the spacing post of second spacing groove tank bottom through spring coupling, and the spacing post of second is used for wearing to establish between second spacing groove and arbitrary first spacing groove.

Through adopting above-mentioned technical scheme, when the pulling inner tube, when the spacing post of second moved the first spacing groove of co-altitude not, the spring can reset and promote the spacing post of second and get into first spacing groove and with the cell wall butt of tank bottom and first spacing groove upper end, can make inner tube and outer tube fixed thereupon for the height difference of liquid sending pipe.

Preferably, one end of the second limiting column, which is far away from the spring, is in a hemispherical shape.

Through adopting above-mentioned technical scheme, when staff's pulling inner tube removed, the one end that the spring was kept away from to the spacing post of second was the hemisphere form, and the one end that the spring was kept away from to the spacing post of second can slide and contract, reduces the friction for staff's operation is more convenient.

Drawings

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of FIG. 1;

FIG. 3 is a partial exploded view of FIG. 1;

FIG. 4 is a partial cross-sectional view of FIG. 1;

fig. 5 is a partially enlarged view of fig. 4.

Reference numerals in the drawings of the specification include: the liquid spraying device comprises a spray head body 1, a liquid spraying surface 11, a first liquid spraying hole 12, an adjusting plate 13, a second liquid spraying hole 14, an annular clamping groove 15, an annular clamping block 16, an adjusting rod 17, a first limiting column 18, a liquid sending pipe 2, an inner pipe 21, a joint pipe 22, an outer pipe 23, a locking structure 24, a first limiting groove 241, a second limiting groove 242, a spring 243, a second limiting column 244, a protective cover 3, an elastic clamping component 4, an annular limiting table 41, an elastic sheet 42 and a resisting block 43.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments:

as shown in fig. 1 and 2, an embodiment of the present invention provides a spray head for spraying paint on an automobile hub, including a conical spray head body 1 with two open ends and a liquid sending pipe 2 detachably connected to a joint end of the spray head body 1, wherein a plurality of first liquid spraying holes 12 are formed on a liquid spraying surface 11 of the spray head body 1, an adjusting plate 13 is rotatably connected to the liquid spraying surface 11 of the spray head body 1, a plurality of second liquid spraying holes 14 matched with the first liquid spraying holes 12 one by one are formed on the adjusting plate 13, and the adjusting plate 13 is rotated to align each first liquid spraying hole 12 and the second liquid spraying hole 14 matched therewith to be fully communicated or to be partially communicated.

The detailed working process of the embodiment is as follows: an adjusting plate 13 is rotatably connected to a liquid spraying surface 11 of the sprayer body 1, when a large-area fluid volume needs to be sprayed, the first liquid spraying holes 12 and the second liquid spraying holes 14 are completely aligned and completely communicated, so that the large-area fluid volume can be obtained for processing, and when a small-area fluid volume needs to be sprayed, a worker can rotate the adjusting plate 13, so that the first liquid spraying holes 12 on the outer side of the liquid spraying surface 11 and the second liquid spraying holes 14 on the adjusting plate 13 are partially communicated in a staggered and staggered mode, and a small-area fluid volume can be obtained for processing. Because can adjust the size of blowout paint fluid volume, produced the staff and need not change the shower nozzle and can realize this shower nozzle in the regulation between large-traffic and low discharge to satisfy user demand's effect.

As shown in fig. 2, according to another embodiment of the present invention, in the spray head for painting automobile wheel hubs, the liquid sending pipe 2 includes an inner pipe 21 with a larger diameter and a joint pipe 22 with a smaller diameter fixedly connected thereto, the diameter of the joint end of the spray head body 1 is larger than the diameter of the joint pipe 22 and is connected with the joint pipe 22 in a threaded manner, and the joint pipe 22 is slidably sleeved with the protective cover 3; when the joint end of the nozzle body 1 is connected to the joint pipe 22, the elastic clamping assembly 4 provided in the joint pipe 22 is fixed to the shield 3 by a force generated by the movement of the joint end of the nozzle body 1 along the joint pipe 22.

The detailed working process of the embodiment is as follows: the protection casing 3 is clamped and installed on the side wall of the liquid feeding pipe 2 through an elastic clamping assembly 4. Due to the fact that the protective cover 3 is installed, the effect that the injury of workers in the working process is reduced is achieved.

As shown in fig. 2, according to another embodiment of the present invention, in the spray head for spraying paint to the automobile hub, the protective cover 3 is hemispherical, and the side wall thereof is provided with an opening for the joint pipe 22 to pass through, after the spray head body 1 is connected with the joint pipe 22, the spray liquid level 11 of the spray head body 1 is partially arranged outside the protective cover 3; and the elastic clamping assembly 4 elastically fixes the shield cover so that the shield cover 3 can rotate.

The detailed working process of the embodiment is as follows: the protection casing 3 is installed at the coupling pipe outer wall, and the spray level 11 part of shower nozzle body 1 is established in the protection casing 3 outside, and the staff can suitably rotate protection casing 3 to observe operating condition.

The opening of the protection cap 3 is specifically at a position of the surface of the protection cap 3 along its axial direction 1/3 so that the liquid ejection face 11 portion of the head body 1 is left outside when mounted, facilitating the worker to observe the working state without rotating.

As shown in fig. 2, according to another embodiment of the present invention, in the spray head for spraying paint on an automobile hub, the elastic clamping assembly 4 includes an annular limiting platform 41 formed at a connection portion between the inner tube 21 and the joint tube 22, and two elastic pieces 42 hinged to and arranged opposite to each other on an outer wall of the joint tube 22, an opening on a surface of the protective cover 3 abuts between the annular limiting platform 41 and the two elastic pieces 42, and a joint end cover of the spray head body 1 is arranged to drive the two elastic pieces to separate from each other when moving outside the joint tube 22; the two elastic pieces 42 rotate away from each other to make the protection cover 3 abut against between the two elastic pieces 42 and the annular limiting table 41.

The detailed working process of the embodiment is as follows: the surface opening of the protective cover 3 is abutted between the included angle of the annular limiting table 41 and the elastic sheet 42, and the elastic sheet 42 is pushed to press and fix the protective cover 3 by the force generated by the movement of the joint end of the spray head body 1 along the outer wall of the joint pipe 22. Because protection casing 3 and liquid sending pipe 2 are fixed through the 4 joint of elasticity joint subassembly, produced the effect of being convenient for change when needing to change protection casing 3.

As shown in fig. 2, according to another embodiment of the present invention, in the spray head for spraying paint on an automobile hub, a stop 43 for preventing the elastic piece 42 from adhering to the joint pipe 22 is fixedly mounted on one side of each elastic piece 42 close to the joint pipe 22.

The detailed working process of the embodiment is as follows: when the protective cover 3 is taken down, the two elastic pieces 42 are close to the pipe wall of the liquid sending pipe 2, and the abutting stop block 43 is integrally connected to one side, close to the pipe wall of the liquid sending pipe 2, of the elastic pieces 42, so that the elastic pieces 42 can not be attached to the pipe wall of the liquid sending pipe 2, when the liquid outlet end of the spray head body 1 and the liquid outlet end of the liquid sending pipe 2 need to be connected, a worker can conveniently install the spray head body 1 and the liquid sending pipe 2 without stretching the hand to pull the elastic pieces 42 open. Based on the further improvement, because the elastic piece 42 is connected with the abutting stop 43 at the side close to the liquid sending pipe 2 in an integrated manner, the conduction pipe thread connection of the liquid sending pipe 2 and the spray head body 1 can be completed without pulling the elastic piece 42 by a worker.

As shown in fig. 2, according to another embodiment of the present invention, in the spray head for spraying paint on an automobile hub, a liquid spraying surface 11 of the spray head body 1 is provided with an annular groove 15 disposed outside a plurality of first liquid spraying holes 12, and an adjusting plate 13 is connected with an annular clamping block 16 rotatably clamped in the annular groove. The detailed working process of the embodiment is as follows: the annular clamping block 16 is rotatably connected with the annular clamping groove 15, and the adjusting plate 13 is rotated when the amount of the discharged paint is required to be adjusted.

As shown in fig. 3, according to another embodiment of the present invention, in the spray head for spraying paint on an automobile hub, an adjusting rod 17 is fixedly connected to a circumferential side surface of the adjusting plate 13, two first limiting posts 18 are connected to a side surface of the spray head body 1 close to the liquid spraying surface 11, the adjusting rod 17 is located between the two first limiting posts 18 and moves; when the adjusting rod 17 abuts against any one of the first limiting columns 18, each first liquid spraying hole 12 is aligned with the second liquid spraying hole 14 matched with the first liquid spraying hole and is completely communicated or the holes are staggered to be partially communicated.

The detailed working process of the embodiment is as follows: first spacing post 18 is the L type, two first spacing posts 18 set up relatively, when the staff need adjust the flow, directly pull the regulation pole 17 and draw close one of them first spacing post 18 and carry on spacingly can make a plurality of first hydrojet holes 12 and a plurality of second hydrojet hole 14 align completely, so that the large tracts of land fluid volume of blowout, when needs blowout little fluid volume, pull the regulation pole 17 to the first spacing post 18 of drawing close the opposite side, make the hole crisscross part of a plurality of first hydrojet holes 12 and a plurality of second hydrojet holes 14 overlap local alignment, the small volume of fluid volume of blowout. Based on the further improvement, when the fluid quantity is adjusted, the adjusting rod 17 can be directly pulled to drive the adjusting plate 13 to rotate, and the effect of facilitating the operation of workers is achieved.

As shown in fig. 4, according to another embodiment of the present invention, in the spray head for spraying paint on an automobile hub, the liquid feeding pipe 2 further includes an outer pipe 23 slidably disposed at one end of the inner pipe 21, which is away from the outer pipe 23, is connected to the joint of the spray head body 1, and a locking structure 24 for controlling the relative movement state of the inner pipe 21 and the outer pipe 23 is disposed between the inner pipe 21 and the outer pipe 23.

The detailed working process of the embodiment is as follows: the inner tube 21 is sleeved in the outer tube 23 and is slidably connected with the outer tube 23, and when the height of the liquid delivery tube 2 needs to be adjusted, the inner tube 21 is pulled to move up and down. Based on the above-described further improvement, there is produced an advantageous effect that the height of the liquid sending pipe 2 is easily adjusted.

As shown in fig. 4, according to another embodiment of the utility model, a shower nozzle that automobile wheel hub sprays paint, locking structure 24 includes a plurality of first spacing grooves 241 along its axis direction equipartition on the outer tube 23 inner wall, and first spacing groove 241 opening is towards the inner chamber, has seted up second spacing groove 242 on the outside lateral wall of inner tube 21, and the opening of second spacing groove 242 is towards outer tube 23, and the tank bottom of second spacing groove 242 is connected with second spacing post 244 through spring 243, and second spacing post 244 is used for wearing to establish between second spacing groove 242 and arbitrary first spacing groove 241.

The detailed working process of the embodiment is as follows: when the inner tube 21 is pulled, the second limiting column 244 moves to the first limiting grooves 241 with different heights, and the spring 243 resets to push the second limiting column 244 to enter the first limiting groove 241 and abut against the groove bottom and the groove wall at the upper end of the first limiting groove 241, so that the inner tube 21 and the outer tube 23 can be fixed, and the liquid sending tubes 2 are different in height. Based on the above-described further improvement, there is produced an advantageous effect that the height of the liquid sending pipe 2 is easily adjusted.

As shown in fig. 5, according to another embodiment of the present invention, in the spray head for spraying paint on an automobile hub, one end of the second limiting post 244, which is far away from the spring 243, is shaped like a hemisphere. The detailed working process of the embodiment is as follows: because the end of the second position-limiting column 244 away from the spring 243 is shaped like a hemisphere, when the worker pulls the inner tube 21 to move, the end of the second position-limiting column 244 away from the spring 243 can slide and contract. Based on the above further improvement, the friction between the second limiting column 244 and the groove wall of the first limiting groove 241 is reduced when the inner pipe 21 is pulled, so that the inner pipe 21 is pulled by a worker smoothly.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. The utility model provides a shower nozzle that automobile wheel hub sprays paint, includes shower nozzle body (1) and can dismantle liquid delivery pipe (2) of being connected with shower nozzle body (1), seted up a plurality of first hydrojet holes (12) on hydrojet face (11) of shower nozzle body (1), its characterized in that: the liquid spraying device is characterized in that an adjusting plate (13) is attached to a liquid spraying surface (11) of the spray head body (1) in a rotating mode, a plurality of second liquid spraying holes (14) matched with the first liquid spraying holes (12) one by one are formed in the adjusting plate (13), and each first liquid spraying hole (12) is aligned with the second liquid spraying hole (14) matched with the corresponding first liquid spraying hole (12) to be completely communicated or the holes are staggered to be locally communicated by rotating the adjusting plate (13).

2. The spray head for spraying the automobile hub according to claim 1, characterized in that: the liquid sending pipe (2) comprises an inner pipe (21) and a joint pipe (22) fixedly connected with the inner pipe, the outer diameter of the inner pipe (21) is larger than that of the joint pipe (22), the diameter of the joint end of the sprayer body (1) is larger than that of the joint pipe (22) and is detachably connected with the joint pipe, and a protective cover (3) is slidably sleeved on the joint pipe (22); when the joint end of the nozzle body (1) is connected with the joint pipe (22), the elastic clamping assembly (4) arranged on the joint pipe (22) is fixed on the protective cover (3) by the force generated by the movement of the joint end of the nozzle body (1) along the outer wall of the joint pipe (22).

3. The spray head for spraying the automobile hub according to claim 2, characterized in that: the protective cover (3) is hemispherical, an opening for the joint pipe (22) to penetrate through is formed in the side wall of the protective cover, and after the spray head body (1) is connected with the joint pipe (22), the liquid spraying surface (11) of the spray head body (1) is partially arranged on the outer side of the protective cover (3); and the elastic clamping assembly (4) elastically fixes the protective cover so that the protective cover (3) can rotate.

4. The spray head for spraying the automobile hub according to claim 3, characterized in that: the elastic clamping assembly (4) comprises an annular limiting table (41) formed at the joint of the inner tube (21) and the joint tube (22) and two elastic pieces (42) hinged to the outer wall of the joint tube (22) and arranged oppositely, and an opening on the surface of the protective cover (3) abuts between the annular limiting table (41) and the two elastic pieces (42); when the joint end sleeve of the nozzle body (1) is sleeved on the outer side of the joint pipe (22) to move, the two elastic pieces (42) are driven to rotate away from each other so that the protective cover (3) is pressed against between the two elastic pieces (42) and the annular limiting table (41).

5. The spray head for spraying the automobile hub according to claim 4, characterized in that: one side of each elastic piece (42) close to the joint pipe (22) is fixedly provided with a resisting block (43) for preventing the elastic piece (42) from being attached to the joint pipe (22).

6. The spray head for spraying the automobile hub according to claim 1, characterized in that: the liquid spraying surface (11) of the spray head body (1) is provided with annular clamping grooves (15) which are arranged on the outer sides of the first liquid spraying holes (12), and the adjusting plate (13) is connected with an annular clamping block (16) which is rotatably clamped in the annular clamping grooves (15).

7. The spray head for spraying the automobile hub according to claim 6, characterized in that: an adjusting rod (17) is fixedly connected to the circumferential side surface of the adjusting plate (13), two first limiting columns (18) which are arranged at intervals are connected to the side surface, close to the liquid spraying surface (11), of the sprayer body (1), and the adjusting rod (17) is located between the two first limiting columns (18) to move; when the adjusting rod (17) is abutted against any one first limiting column (18), each first liquid spraying hole (12) is aligned with the second liquid spraying hole (14) matched with the first liquid spraying hole and is completely communicated or the holes are staggered to be partially communicated.

8. The spray head for spraying the automobile hub according to claim 2, characterized in that: the liquid sending pipe (2) further comprises an outer pipe (23) which is sleeved at one end of the inner pipe (21) in a sliding mode, and a locking structure (24) which is used for controlling the relative movement state of the inner pipe (21) and the outer pipe (23) is arranged between the inner pipe (21) and the outer pipe (23).

9. The spray head for spraying the automobile hub according to claim 8, characterized in that: locking structure (24) include a plurality of first spacing grooves (241) along its axis direction equipartition on outer tube (23) inner wall, first spacing groove (241) opening is towards the inner chamber, second spacing groove (242) have been seted up on inner tube (21) outside lateral wall, the opening of second spacing groove (242) is towards outer tube (23), the tank bottom of second spacing groove (242) is connected with spacing post (244) of second through spring (243), spacing post (244) of second is used for wearing to establish between spacing groove (242) of second and arbitrary first spacing groove (241).

10. The spray head for spraying the automobile hub according to claim 9, characterized in that: one end of the second limit column (244) far away from the spring (243) is in a hemispherical shape.