Selective wave soldering equipment

Abstract

The utility model discloses selective wave soldering equipment which comprises a shell, a rack arranged in the shell, a transportation track partially arranged in the shell and erected on the rack, and a spraying module, a preheating module and a welding module which are arranged in the shell and sequentially arranged in the transportation direction of the transportation track. The conveying rail comprises a first conveying rail body and a second conveying rail body which are arranged side by side, and an adjusting assembly connected to the first conveying rail body and the second conveying rail body and arranged on the first conveying rail body and the second conveying rail body and used for adjusting the first conveying rail body and the second conveying rail body to achieve reciprocating motion. By the aid of the conveying rail, a worker can directly prepare for assembling the circuit board on another conveying rail after placing the assembled circuit board on the conveying rail in the welding production process, and the conveying rail conveys the circuit board back to the position where the assembled circuit board is initially placed after welding is completed, so that the selective wave-soldering efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, in particular to a selective wave soldering device. Background Art

[0002] In the electronics manufacturing industry, soldering is a critical process for connecting electronic components to circuit boards. Traditional soldering methods are primarily automated and manual. In manual soldering, the operator manually inserts the components and then places the assembled circuit board onto a conveyor line. Similarly, the circuit board undergoes a series of processes, including spraying, preheating, and soldering, before being removed from the production line.

[0003] In the process of implementing the prior art, the inventors found that:

[0004] During the welding process, the production cycle time of single-section track welding is long, and manual welding needs to be taken out at the rear end of the conveyor line, which also causes the welding production time to be long, which reduces production efficiency and increases labor intensity.

[0005] In order to solve these problems, the present application provides a technical solution that can increase the efficiency of selective wave soldering, so as to solve the problem of low soldering efficiency in the previous manual soldering process. Summary of the Invention

[0006] The purpose of the present invention is to provide a technical solution that can increase the efficiency of selective wave soldering, so as to solve the problem of low soldering efficiency in the previous manual soldering process.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A selective wave soldering device includes a shell, a frame arranged in the shell, a transport track partially arranged in the shell and mounted on the frame, a spray module, a preheating module, and a welding module arranged in the shell and sequentially arranged along the transport direction of the transport track, the transport track including a first transport track and a second transport track arranged side by side, and an adjustment component connected to and arranged on the first transport track and the second transport track, for adjusting the first transport track and the second transport track to achieve reciprocating motion.

[0009] The present invention is further configured as follows: the first transport track includes a carrier and a first track assembly and a second track assembly located on both sides of the carrier; the second transport track includes a carrier and a third track assembly and a fourth track assembly located on both sides of the carrier; the distance between the second track assembly and the third track assembly is smaller than the distance between the first track assembly and the fourth track assembly; the first track assembly includes at least a track and sprockets installed at both ends of the track for driving the carrier to move on the track; the sprockets at both ends of the track are connected by a chain, the carrier is connected to the chain, and the first track assembly and the second track assembly have the same structure.

[0010] The present invention is further configured as follows: the adjustment component specifically includes: a drive motor 1 connected to one of the sprockets at both ends of the track of the first track component; a drive motor 2 connected to one of the sprockets at both ends of the track of the second track component; and a drive motor electrically connected to the drive motor 1 and the drive motor 2, used to drive the sprocket of the first track component and the sprocket of the second track component to rotate so as to realize reciprocating motion of the carrier on the first transport track.

[0011] The present invention is further configured such that: the adjustment assembly further comprises a width adjustment assembly for adjusting the distance between the first transport track and the second transport track and a lifting assembly for adjusting the height of the first transport track and the second transport track.

[0012] The present invention is further configured as follows: the width adjustment component specifically includes: a width extension component 1 and a width extension component 2, which are installed perpendicularly to the transport direction of the first transport track and the second transport track at a predetermined distance; a driving component installed parallel to the outside of the track of the first track component and connected to the width extension component 1 and the width extension component 2; the width extension component 1 and the width extension component 2 have the same structure.

[0013] The present invention is further configured as follows: the width extension component 1 specifically includes: a connecting frame perpendicular to the transport direction of the first transport track and the second transport track; a connecting column provided on the tracks of the first track assembly, the second track assembly, the third track assembly, and the fourth track assembly and movably connected to the connecting frame; an adjusting screw rod for adjusting the distance between the first track assembly and the second track assembly and the third track assembly and the fourth track assembly is connected through the connecting column of the first track assembly, the second track assembly, the third track assembly, and the fourth track assembly; the adjusting screw rod is provided with a bevel gear connected to the drive assembly at one end close to the drive assembly.

[0014] The present invention is further configured as follows: the driving assembly specifically includes: an aluminum profile connected between a connecting frame of width extension assembly one and a connecting frame of width extension assembly two; a driving rod mounted on the aluminum profile and used to engage with the bevel gear of the adjusting screw; a driving motor installed on the aluminum profile; and a driving motor three installed on the aluminum profile; wherein, a transmission gear one is provided on the driving rod, a transmission gear two is provided on the driving motor, and the transmission gear one and the transmission gear two are driven by a synchronous belt.

[0015] The present invention is further configured as follows: the lifting assembly includes several lifting assemblies installed at the bottom of the aluminum profile outside the track of the first track assembly and several lifting assemblies installed at the bottom of the aluminum profile outside the track of the fourth track assembly; the aluminum profile outside the track of the fourth track assembly is connected to the connecting frame of the width extension assembly one and the connecting frame of the width extension assembly two; the lifting assembly specifically includes a lifting platform and a lifting rod connected to the lifting platform for lifting.

[0016] The present invention is further configured as follows: the spray module specifically includes: a base mounted on a frame; a slide rail installed on the base; a spray unit movably connected to the slide rail; the base is also provided with a drive motor four for driving the spray unit to reciprocate on the slide rail; the drive motor four is electrically connected to the controller.

[0017] In summary, the beneficial technical effects of the present invention are:

[0018] With the selective wave soldering equipment provided by the present application, two transport tracks are provided, and each transport track enables the carrier of the track to realize reciprocating motion, so that during the welding production process, the staff can place the assembled circuit board on the transport track and then directly prepare for the assembly of the circuit board on another transport track. After the welding is completed, the transport track transports it back to the original position where the assembled circuit board was placed, thereby increasing the efficiency of selective wave soldering. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0020] Figure 2 This is a schematic structural diagram of an embodiment of the present invention without the outer shell;

[0021] Figure 3 It is a schematic structural diagram of a transport track according to an embodiment of the present invention.

[0022] Figure 4 is a schematic diagram of a spraying module according to an embodiment of the present invention;

[0023] Figure 5 2 is a schematic structural diagram of a preheating module according to an embodiment of the present invention;

[0024] Figure 6 It is a structural schematic diagram of a welding module according to an embodiment of the present invention.

[0025] In the figure, 100, selective wave soldering equipment;

[0026] 1. Shell;

[0027] 2. Transport track; 21. First transport track; 211. First track assembly; 2111. Track; 2112. Sprocket; 2113. Carrier; 212. Second track assembly; 213. Third track assembly; 214. Fourth track assembly; 22. Second transport track;

[0028] 3. Adjustment component; 31. Drive motor 1; 32. Drive motor 2; 33. Controller;

[0029] 34. Width adjustment component;

[0030] 341. Width extension assembly 1; 3411. Connecting frame; 3412. Connecting column; 3413. Adjusting screw;

[0031] 3414, bevel gear;

[0032] 342, width extension component 2;

[0033] 343, drive assembly; 3431, aluminum profile; 3432, drive rod; 3433, drive motor three; 3434, transmission gear one; 3435, transmission gear two;

[0034] 35. Lifting assembly;

[0035] 4. Lifting unit; 41. Lifting platform; 42. Lifting rod;

[0036] 5. Spraying module; 51. Base; 52. Slide rail; 53. Spraying unit; 54. Drive motor 4;

[0037] 6. Preheating module;

[0038] 7. Welding module. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0040] Reference Figure 1 and Figure 2A selective wave soldering device 100 includes a shell 1, a frame arranged in the shell 1, a transport track 2 partially arranged in the shell 1 and mounted on the frame, a spraying module 5, a preheating module 6, and a welding module 7 arranged in the shell 1 and sequentially arranged along the transport direction of the transport track 2, the transport track 2 including a first transport track 21 and a second transport track 22 arranged side by side, and an adjustment component connected to and arranged on the first transport track 21 and the second transport track 22 for adjusting the first transport track 21 and the second transport track 22 to achieve reciprocating motion.

[0041] Specifically, the selective wave soldering equipment 100 provided in the present application mainly improves its transport track 2 to improve the soldering efficiency of the soldering equipment. That is, it can be understood that the spray module 5, preheating module 6, and welding module 7 arranged along the transport track 2 are still the previous structures, or on the basis of improvements made in the transport direction of the transport track 2, a movable or rotatable structure of the spray module 5, preheating module 6, and welding module 7 is added. For example, the transport track 2 in the present application is set in a parallel type, and the corresponding spray module 5, preheating module 6, and welding module 7 can be arranged in a direction perpendicular to the transport direction. It is understandable that for those skilled in the art, it is conceivable to add a movable or rotatable structure to the spray module 5, preheating module 6, and welding module 7, so it will not be repeated here.

[0042] The present application changes the conventional one transport track 2 to two transport tracks 2 because the conventional one transport track 2 has a long cycle time for product processing, and the extra time can be used to process products on another transport track 2. Therefore, the present application sets up two tracks for the same selective wave soldering equipment 100, and the two tracks work alternately, thereby increasing the soldering efficiency of the soldering equipment.

[0043] Preferably, the transport track 2 includes a first transport track 21 and a second transport track 22 arranged side by side. The first transport track 21 includes a carrier 2113 and a first track assembly 211 and a second track assembly 212 located on either side of the carrier 2113. The second transport track 22 includes a carrier 2113 and a third track assembly 213 and a fourth track assembly 2144 located on either side of the carrier 2113. It will be understood that the first track assembly 211 and the second track assembly 212 are used to enable the carrier 2113 of the first transport track 21 to move along the track, while the third track assembly 213 and the fourth track assembly 2144 are used to enable the carrier 2113 of the second transport track 22 to move along the track 2111. The distance between the second track assembly 212 and the third track assembly 213 is less than the distance between the first track assembly 211 and the fourth track assembly 2144, i.e., the second track assembly 212 of the first transport track 21 is closer to the third track assembly 213.

[0044] It should be noted that the structures of the first track assembly 211, the second track assembly 212, the third track assembly 213, and the fourth track assembly 2144 are identical, namely, they include a track 2111 and sprockets 2112 mounted at both ends of the track 2111 for driving a carrier 2113 to move along the track 2111. The sprockets 2112 at both ends of the track 2111 are connected by a chain. The carrier 2113 is connected to the chains of the first track assembly 2111 and the second track assembly 212, respectively, which can be understood as being welded to the chain. The carrier 2113 is used to carry welded products, which in this application primarily refers to circuit boards.

[0045] Preferably, the adjustment component 3 specifically includes: a drive motor 1 (not shown in the figure) connected to one of the sprockets 2112 at the two ends of the track 2111 of the first track component 211; a drive motor 2 (not shown in the figure) connected to one of the sprockets 2112 at the two ends of the track 2111 of the second track component 212; a controller (not shown in the figure) electrically connected to the drive motor 1 and the drive motor 2, and used to drive the sprocket 2112 of the first track component 211 and the sprocket 2112 of the second track component 212 to rotate so as to realize the reciprocating motion of the carrier 2113 on the first transport track 21.

[0046] It can be understood that the adjustment component 3 is used to adjust the rotation of the sprocket 2112 on the first track component 211, the second track component 212, the third track component 213, and the fourth track component 2144, thereby driving the chain thereon to rotate, and the corresponding carrier 2113 connected to the chain is moved.

[0047] It should also be understood that in this application, the controller simultaneously controls the drive motor 1 connected to the sprocket 2112 of the first track assembly 211 and the drive motor 2 connected to the sprocket 2112 of the second track assembly 212, so that the carrier 2113 can move along the transport track 2. Accordingly, by controlling the drive motors to reverse, the carrier 2113 can move in the opposite direction, thereby achieving reciprocating movement of the carrier 2113. It should be noted that when the carrier 2113 moves, the sprocket 2112 of the first track assembly 211 and the sprocket 2112 of the second track assembly 212 rotate in opposite directions under the drive of the drive motors 1 and 2. Accordingly, the third track assembly 213 and the fourth track assembly 2144 are also controlled by the controller to achieve the movement of the carrier 2113 driven by the first track assembly 211 and the second track assembly 212 as described above. It should be noted that the controller is a device with control functions, that is, it can be a PLC controller or other device with control functions.

[0048] Preferably, the adjustment assembly 3 further includes a width adjustment assembly 34 for adjusting the distance between the first transport track 21 and the second transport track 22, and a lifting assembly (not shown in the figure) for adjusting the height of the first transport track 21 and the second transport track 22. It can be understood that the provision of the width adjustment assembly and the lifting assembly is mainly due to the fact that the welding equipment is changed from a single track to a dual track, and both tracks need to achieve reciprocating motion. Therefore, the width adjustment and lifting functions are provided to increase the purpose of increasing the adaptability of the welding equipment to products of different sizes.

[0049] The width adjustment component 34 specifically includes: a width extension component 1 341 and a width extension component 2 342 installed perpendicularly to the transport direction of the first transport track 21 and the second transport track 22 at a predetermined distance; a driving component 343 installed parallel to the outside of the track 2111 of the first track component 211 and connected to the width extension component 1 341 and the width extension component 2 342; the width extension component 1 341 and the width extension component 2 342 have the same structure.

[0050] Specifically, the first width extension component 341 and the second width extension component 342 are mainly used to adjust the distance between the first transport track 21 and the second transport track 22 to adapt the equipment to processing circuit boards of different sizes.

[0051] The width extension component 341 specifically includes: a connecting frame 3411 perpendicular to the transport direction of the first transport rail 21 and the second transport rail 22; a connecting column 3412 provided on the rail 2111 of the first rail component 211, the second rail component 212, the third rail component 213, and the fourth rail component 2144 and movably connected to the connecting frame 3411; an adjusting screw rod 3413 for adjusting the distance between the first rail component 211 and the second rail component 212 and the third rail component 213 and the fourth rail component 2144 is connected through the connecting column 3412 of the first rail component 211, the second rail component 212, the third rail component 213, and the fourth rail component 2144; the adjusting screw rod 3413 is provided with a bevel gear 3414 connected to the drive component 343 at one end close to the drive component 343.

[0052] Specifically, the connecting frame 3411 and the rails 2111 of each rail assembly are connected by connecting columns 3412. It should be noted that the connecting columns 3412 and the connecting frame 3411 are slidably connected. The several connecting columns 3412 connected to the connecting frame 3411 are penetrated by an adjusting screw 3413. That is, it can be understood that the rotation of the adjusting screw 3413 must ensure that the connecting column 3412 connected to the first transport rail 21 remains stationary, and the connecting column 3412 connected to the second transport rail 22 moves away from or closer to the first transport rail 21 along the axial direction of the adjusting screw 3413. In a preferred embodiment provided in the present application, the adjusting screw 3413 is slidably connected to the connecting column 3412 between the first transport rail 21 and is threadedly connected to the connecting column 3412 between the second transport rail 22. Of course, the connection relationship can also be set in the opposite direction.

[0053] Preferably, the driving component 343 includes: an aluminum profile 3431 connected between the connecting frame 3411 of the width extension component 1 341 and the connecting frame 3411 of the width extension component 2 342; a driving rod 3432 mounted on the aluminum profile 3431 and used to engage with the bevel gear 3414 of the adjusting screw rod 3413; a driving motor 3433 installed on the aluminum profile 3431; wherein, a transmission gear 1 3434 is provided on the driving rod 3432, and a transmission gear 2 3435 is provided on the driving motor 3433, and the transmission gear 1 3434 and the transmission gear 2 3435 are driven by a synchronous belt; and the driving motor 3433 is electrically connected to the controller.

[0054] Specifically, aluminum profile 3431 is located between width extension assembly 1 341 and width extension assembly 2 342, connected to width extension assembly 1 341 and width extension assembly 2 342 via connecting column 3412, and parallel to track 2111 of transport track 2. A drive rod 3432 and drive motor 3433 are mounted on aluminum profile 3431. Drive motor 3433 is connected to transmission gear 2 3435, which forms a synchronous belt drive with transmission gear 1 3434 on drive rod 3432. Through this transmission, drive rod 3432 rotates, and the bevel gears 3414 of the adjustment screw 3413 meshing with drive rod 3432 at both ends also rotate, thereby changing the distance between first transport track 21 and second transport track 22.

[0055] Preferably, the lifting assembly includes several lifting units 4 installed at the bottom of the aluminum profile 3431 outside the track 2111 of the first track assembly 211 and several lifting units 4 installed at the bottom of the aluminum profile 3431 outside the track 2111 of the fourth track assembly 2144; the aluminum profile 3431 outside the track 2111 of the fourth track assembly 2144 is connected to the connecting frame 3411 of the width extension assembly 1 341 and the connecting frame 3411 of the width extension assembly 2 342; the lifting assembly specifically includes a lifting platform 41 and a lifting rod 41 connected to the lifting platform 41 for lifting.

[0056] The lifting assembly is mainly used to adjust the height position of the transport track 2. In the present application, a lifting unit 4 is installed at the bottom of the aluminum profile 3431 on the outside of the first track assembly 211. Symmetrically, an aluminum profile 3431 is also provided on the outside of the track 2111 of the fourth track assembly 2144. The aluminum profile 3431 is also connected to the connecting frame 3411 through a connecting column 3412, and a lifting unit 4 is provided at its bottom. The lifting unit 4 installed at the bottom of the aluminum profile 3431 on the outside of the first track assembly 211 and the lifting unit 4 installed at the bottom of the aluminum profile 3431 on the outside of the fourth track assembly 2144 are lifted and lowered together to realize the lifting and lowering of the transport track 2. It can be understood that each lifting rod 41 can be driven by each lifting motor to achieve lifting and lowering, and each lifting belt motor is electrically connected to the controller and controlled by the controller.

[0057] Preferably, Figure 4 As shown, the spray module 5 specifically includes: a base 51 mounted on a frame; a slide rail installed on the base 51; a spray unit 53 movably connected to the slide rail; the base 51 is also provided with a drive motor 4 54 for driving the spray unit 53 to reciprocate on the slide rail; the drive motor 4 54 is electrically connected to the controller.

[0058] It can be understood that the spraying module 5 is the same as the spraying module 5 in the prior art, except that when the number of transport tracks 2 is increased to two, a slide rail is added so that the spraying module 5 can slide on the slide rail and spray the products carried by the carriers 2113 on the two transport tracks 2. Figure 5 and Figure 6 As shown, the preheating module 6 and the welding module 7 are also improved accordingly, just like the spraying module 5 .

[0059] In the actual application process of this application, it is specifically manifested as follows:

[0060] The selective wave soldering equipment is activated to adjust the spacing and height between the first and second transport rails 21, 22 according to the products being soldered. Specifically, the controller controls the rotation of the drive motor 3433 of the adjustment assembly 3, which in turn rotates the drive rod 3432. This in turn causes the bevel gear 3414 of the adjustment screw 3413, which engages both ends of the drive rod 3432, to rotate. This in turn causes the connecting column 3412 on the first and second transport rails 21, 22 to rotate along the axial direction of the adjustment screw 3413, thereby changing the spacing between the first and second transport rails 21, 22. The controller controls the lifting and lowering of the lifting rod 41 of the lifting assembly to achieve the change in height between the first and second transport rails 21, 22. After adjusting the width and height of transport track 2, the worker places the product on carrier 2113. The controller simultaneously controls the rotation of sprockets 2112 on the first and second track assemblies 211 and 212 to move carrier 2113 along track 2111. After passing through spray module 5, preheating module 6, and welding module 7, the product processing is completed. The controller then controls the rotation of sprockets 2112 in the opposite direction, returning carrier 2113 to its initial position. After placing the product on carrier 2113, the worker can place the product on carrier 2113 on the second transport track 22, performing the same movement as on the first transport track 21. As can be seen, this device can directly prepare the placement of products on one transport track 2 after the product is placed on the next transport track 2, thereby increasing the efficiency of selective wave soldering. Furthermore, each transport track 2 can achieve reciprocating motion, eliminating the previous need to remove the product at the rear end of the conveyor line, thereby improving the efficiency of selective wave soldering.

[0061] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structures or equivalent process changes made using the contents of the present invention's description and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A selective wave soldering device, comprising a housing, a frame disposed within the housing, a transport track partially disposed within the housing and mounted on the frame, a spraying module, a preheating module, and a soldering module disposed within the housing and sequentially arranged along the transport direction of the transport track, characterized in that: The transport track includes a first transport track and a second transport track arranged side by side, and an adjustment component connected to and arranged on the first transport track and the second transport track, for adjusting the first transport track and the second transport track to achieve reciprocating motion; The first transport track includes a carrier and a first track assembly and a second track assembly located on both sides of the carrier; the second transport track includes a carrier and a third track assembly and a fourth track assembly located on both sides of the carrier, wherein the distance between the second track assembly and the third track assembly is smaller than the distance between the first track assembly and the fourth track assembly; the first track assembly includes at least a track and sprockets mounted at both ends of the track for driving the carrier to move on the track, the sprockets at both ends of the track are connected by a chain, the carrier is connected to the chain, and the first track assembly and the second track assembly have the same structure; The adjustment assembly specifically includes: a first drive motor connected to one of the sprockets at both ends of the track of the first track assembly; a second drive motor connected to one of the sprockets at both ends of the track of the second track assembly; and a controller electrically connected to the first drive motor and the second drive motor and configured to drive the sprockets of the first track assembly and the second track assembly to rotate so as to achieve reciprocating motion of the carrier on the first transport track; The adjusting assembly further comprises a width adjusting assembly for adjusting the distance between the first transport track and the second transport track and a lifting assembly for adjusting the height of the first transport track and the second transport track.

2. The selective wave soldering equipment according to claim 1, characterized in that: The width adjustment component specifically includes: A width extension component 1 and a width extension component 2 are installed perpendicularly to the transport direction of the first transport track and the second transport track at a predetermined distance; a drive assembly mounted parallel to the outer side of the track of the first track assembly and connected to the first width extension assembly and the second width extension assembly; The width extension component 1 and the width extension component 2 have the same structure.

3. The selective wave soldering equipment according to claim 2, characterized in that: The width extension component 1 specifically includes: A connecting frame perpendicular to the transport direction of the first transport track and the second transport track; Connecting columns provided on the tracks of the first track assembly, the second track assembly, the third track assembly, and the fourth track assembly and movably connected to the connecting frame; An adjusting screw rod for adjusting the distance between the first track assembly and the second track assembly and the third track assembly and the fourth track assembly is connected through the connecting columns of the first track assembly, the second track assembly, the third track assembly and the fourth track assembly; One end of the adjusting screw rod close to the driving assembly is provided with a bevel gear connected to the driving assembly.

4. The selective wave soldering equipment according to claim 3, characterized in that: The driving component specifically includes: An aluminum profile connected between the connecting frame of the width extension component 1 and the connecting frame of the width extension component 2; A driving rod mounted on the aluminum profile and used to engage with the bevel gear of the adjusting screw; Drive motor 3 mounted on the aluminum profile; Wherein, the driving rod is provided with a transmission gear 1, the driving motor is provided with a transmission gear 2, and the transmission gear 1 and the transmission gear 2 are driven by a synchronous belt; The drive motor three is electrically connected to the controller.

5. The selective wave soldering equipment according to claim 4, characterized in that: The lifting assembly includes a plurality of lifting units installed at the bottom of the aluminum profile outside the track of the first track assembly and a plurality of lifting units installed at the bottom of the aluminum profile outside the track of the fourth track assembly; The aluminum profile on the outer side of the track of the fourth track component is connected to the connecting frame of the width extension component 1 and the connecting frame of the width extension component 2; The lifting assembly specifically includes a lifting platform and a lifting rod connected to the lifting platform for lifting.

6. The selective wave soldering equipment according to claim 1, characterized in that: The spraying module specifically includes: A base mounted on a frame; A slide rail mounted on the base; A spray unit movably connected to the slide rail; The base is also provided with a drive motor 4 for driving the spray unit to reciprocate on the slide rail; The drive motor 4 is electrically connected to the controller.

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