A variable pitch device

Abstract

The present application relates to the technical field of chip handling, and discloses a pitch-changing device, including a machine table, and the machine table is provided with a driving structure, and further includes: a moving main frame, a plurality of suction head modules, and a pitch-changing module; the moving main frame is slidably arranged on the machine table, and the moving main frame is in transmission connection with the driving structure; a sliding shaft is fixedly arranged on the moving main frame; the sliding shaft penetrates through each of the suction head modules, and the suction head modules are slidably connected to the sliding shaft; the pitch-changing module is fixedly arranged on the machine table, and the pitch-changing module has a telescopic part that can be used for clamping and limiting the suction head modules; the moving main frame and the pitch-changing module are arranged at intervals on the machine table. It can realize the diversification of the pitch between each suction head module to adapt to the chip pitch in different tapes, and realize the flexible adjustment of the pitch between each suction head module.

Description

Technical Field

[0001] This application relates to the technical field of chip handling and relates to a pitch-changing device. Background Art

[0002] With the development of technology, the market demand for chips is increasing day by day, and the requirements for chips are also increasing day by day. The detection and handling of chips are both completed with the participation of a suction head module. Generally, there are multiple suction head modules to improve the handling efficiency at one time. However, for chips in different positions, it is necessary to adjust the distance between the suction head modules to better suck and handle the chips.

[0003] The existing distance adjustment of the suction head module, such as the patent number CN219393371U, the patent name is a nozzle device, drives each suction head module to move by the rotation of a camshaft with a guiding groove, thereby adjusting the distance between the suction head modules. This method of adjusting the distance has limitations. The adjustment range of the distance between the suction head modules is small, and when the camshaft rotates, all the suction head modules change simultaneously, and it is impossible to adjust the distance of a single suction head module, and the position of the suction head module cannot be flexibly changed. Summary of the Invention

[0004] This application provides a pitch-changing device, aiming to solve the problem that the position of the suction head module cannot be flexibly changed in the prior art.

[0005] In one solution, a pitch-changing device is provided, including a machine table, and the machine table has a driving structure, and further includes: a moving main frame, a plurality of suction head modules, and a pitch-changing module;

[0006] The moving main frame is slidably arranged on the machine table, and the moving main frame is in transmission connection with the driving structure; a sliding shaft is fixedly arranged on the moving main frame; the sliding shaft penetrates through each suction head module, and the suction head module is slidably connected with the sliding shaft;

[0007] The pitch-changing module is fixedly arranged on the machine table, and the pitch-changing module has a telescopic part that can be used to clamp and limit the suction head module; the moving main frame and the pitch-changing module are arranged at intervals on the machine table.

[0008] Among them, the driving structure includes X, Y, Z-axis drive rods or drive sprockets or slide rails for driving the moving main frame to move on the X, Y, and Z axes; there is a certain frictional force between the suction head module and the sliding shaft, that is, a certain external force intervention is required to realize the sliding of the suction head module on the sliding shaft.

[0009] The driving method for driving the telescopic part to expand and contract is pneumatic driving. The suction head module is connected to a negative pressure air source, and the negative pressure of the negative pressure air source is 53.33 kPa.

[0010] In one solution, the suction head module includes: a telescopic rod having an air passage, a suction nozzle communicating with the air passage, and a sliding member slidably connected to the telescopic rod; the sliding member is slidably connected to the sliding shaft.

[0011] Specifically, the air passage communicates with a negative pressure air source; the telescopic rod can telescopically move relative to the sliding member.

[0012] In one solution, the number of the sliding shafts is two, and the two sliding shafts are arranged in parallel; both of the two sliding shafts pass through the suction head module.

[0013] Specifically, the sliding shaft is columnar.

[0014] In one solution, the sliding member includes: a first sliding block and a second sliding block; both the first sliding block and the second sliding block are provided with first through holes for the sliding shaft to pass through; both the first sliding block and the second sliding block are provided with second through holes for the telescopic rod to pass through.

[0015] Specifically, a first sensor is further provided on the second sliding block.

[0016] In one solution, the suction nozzle and the air passage are detachably connected together by a connecting member.

[0017] In one solution, the connecting member includes: a first buckle and a second buckle; the first buckle has a third through hole sleeved outside the telescopic rod, a first spring is arranged in the third through hole, and the first buckle can slide relative to the telescopic rod by squeezing the first spring; a flow channel communicating with the air passage is formed in the second buckle, and the suction nozzle communicates with the flow channel; the first buckle and the second buckle respectively have corresponding first hooks and second hooks; the first hook and the second hook are buckled and matched.

[0018] Specifically, the first buckle abuts against the telescopic rod through the second spring.

[0019] The connecting member and the lower end of the telescopic rod can be threadedly connected.

[0020] The number of the flow channels and the suction nozzles in each connecting member is a corresponding plurality.

[0021] In one solution, a limit pin is fixedly connected to the telescopic rod, and a card slot for the limit pin to be inserted into is formed in the second hook; in the state where the first hook and the second hook are buckled and connected, the limit pin and the card slot abut against each other.

[0022] Specifically, the resultant force of the first hook and the second hook is the first resultant force, the resultant force of the limit pin and the card slot is the second resultant force, and the resultant force of the second hook and the bottom of the telescopic rod is the third resultant force. The resultant force of the second resultant force and the third resultant force is in two-force balance with the first resultant force.

[0023] In one solution, the pitch-changing module includes: a frame; the telescopic part includes: a first telescopic member; the first telescopic member includes: a slider, a slide rail, a clamping rod, and a telescopic cylinder; the frame is fixedly connected to the machine table; the slide rail is fixedly connected to the frame; the slider is slidably connected to the slide rail; the telescopic end of the telescopic cylinder is hinged to the slider; one end of the clamping rod has a clamping groove for clamping the suction head module, and the other end is fixedly connected to the slider.

[0024] Specifically, the telescopic cylinder is fixedly connected to the frame through a fixing block; the telescopic direction of the telescopic end is parallel to the sliding direction of the slider.

[0025] Specifically, the suction nozzle is threadedly connected or clamped to the flow channel. The suction nozzle has a rubber head.

[0026] Specifically, a second sensor for detecting the moving position of the suction head module is provided on the frame.

[0027] In one solution, a limit block is hinged to the first sliding block, and a convex block for the limit block to be clamped is provided on the telescopic rod; a second spring is sleeved on the lower part of the telescopic rod; and one end of the second spring abuts against the lower end of the telescopic rod, and the other end abuts against the second sliding block.

[0028] Specifically, an elastic piece for pushing the limit block to rotate is provided on the first sliding block, and the limit block abuts against the upper part of the telescopic rod under the elastic force of the elastic piece.

[0029] In one solution, the telescopic part further includes: a second telescopic member spaced from the first telescopic member; the structure of the second telescopic member is the same as that of the first telescopic member; the clamping rod of the second telescopic member can abut against the limit block.

[0030] The beneficial effects of this application:

[0031] By separately arranging the pitch-changing module and the moving main frame, the driving structure drives the moving main frame and multiple suction head modules to move together. The suction head modules pick up the chips and transport them to the designated location. When the pitches in the incoming chips are different and the pitches of the suction head modules need to be adjusted, when each suction head module is moved close to the pitch-changing module, the telescopic part extends out to clamp the corresponding suction head module. As the moving main frame moves, the suction head module moves relative to the sliding shaft, changing the pitch between two adjacent suction head modules, completing the pitch adjustment of each suction head module. Moreover, only the pitch of one suction head module is adjusted each time, enabling diversification of the pitches of the suction head modules to adapt to the chip pitches in different tapes and achieving flexible adjustment of the pitches of the suction head modules.

[0032] Compared with the prior art, in the present invention, by separately arranging the pitch-changing module and the moving main frame, the weight of the moving main frame is reduced, the moment of inertia is greatly reduced, thereby reducing the driving load of the driving structure and lowering the energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic assembly structure diagram of the moving main frame and the suction head module in an embodiment of the present application;

[0035] Figure 2 It is a schematic assembly structure diagram of the pitch-changing module and the suction head module in an embodiment of the present application;

[0036] Figure 3 It is a schematic structure diagram of the pitch-changing module in an embodiment of the present application;

[0037] Figure 4 It is an exploded view of the pitch-changing module in an embodiment of the present application;

[0038] Figure 5 It is a schematic structure diagram of the suction head module in an embodiment of the present application;

[0039] Figure 6 It is an exploded view of the suction head module in an embodiment of the present application;

[0040] Figure 7 It is a schematic structure diagram of a connecting member of the suction head module in an embodiment of the present application;

[0041] Figure 8 It is a schematic structure diagram of another connecting member of the suction head module in an embodiment of the present application;

[0042] Reference numerals in the figures:

[0043] 1. Moving main frame; 11. Sliding shaft;

[0044] 2. Suction head module; 21. Telescopic rod; 22. Suction nozzle; 23. Sliding member; 231. First sliding block; 2311. Limiting block; 2312. Protrusion; 232. Second sliding block; 233. First through hole; 234. Second through hole; 24. Connecting member; 241. First fastening member; 242. Second fastening member; 243. Third through hole; 244. First spring; 245. First hook; 246. Second hook; 25. Limiting pin; 26. Card slot; 27. Second spring; 28. Connecting groove;

[0045] 3. Variable pitch module; 31. Telescopic part; 311. First telescopic member; 3111. Slide block; 3112. Slide rail; 3113. Clamping rod; 3114. Telescopic cylinder; 3115. Clamping groove; 312. Second telescopic member; 32. Frame body; 4. First sensor; 5. Second sensor. Detailed implementation manners

[0046] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application. Similarly, the following embodiments are only partial embodiments of the present application rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0048] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0049] In the present invention, unless otherwise clearly specified or defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified or defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0051] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] This application makes improvements and innovations and proposes the following embodiments.

[0053] In some embodiments, please refer to Figures 1 to 8 , a pitch-changing device is provided, including a machine table, and the machine table has a driving structure, and further includes: a moving main frame 1, a plurality of suction head modules 2, and a pitch-changing module 3;

[0054] The moving main frame 1 is slidably arranged on the machine table, and the moving main frame 1 is in transmission connection with the driving structure; a sliding shaft 11 is fixedly arranged on the moving main frame 1; the sliding shaft 11 penetrates through each suction head module 2, and the suction head module 2 is slidably connected to the sliding shaft 11;

[0055] The variable pitch module 3 is fixedly arranged on the machine table. The variable pitch module 3 has a telescopic part 31 that can be used to clamp and limit the suction head module 2. The moving main frame 1 and the variable pitch module 3 are arranged at intervals on the machine table.

[0056] The variable pitch module 3 and the suction head assembly are arranged oppositely. The telescopic direction of the telescopic part 31 is perpendicular to the extending direction of the sliding shaft 11. This setting facilitates the clamping of the suction head module 2 by the telescopic part 31 and ensures that the resultant force of the telescopic part 31 and the suction head module 2 is perpendicular to the sliding shaft 11. Therefore, the moving resistance of the suction head module 2 can be reduced when adjusting the distance between the suction head modules 2.

[0057] Among them, the driving structure includes X, Y, and Z-axis driving rods or driving sprockets or sliding rails 3112 for driving the moving main frame 1 to move on the X, Y, and Z axes. The driving structure enables the moving main frame 1 to move in three-dimensional space. At the same time, through the cooperation of the driving of the driving structure and the telescopic part 31 of the variable pitch module 3, the distance between the suction head modules 2 is adjusted.

[0058] There is a certain frictional force between the suction head module 2 and the sliding shaft 11, that is, a certain external force intervention is required to enable the suction head module 2 to slide on the sliding shaft 11. Having a certain frictional force can ensure that the suction head module 2 will not move randomly after the distance is adjusted, ensuring the stability of the distance, and further ensuring that the suction head module 2 can smoothly suck and transport the chip to the designated position.

[0059] The driving method for driving the telescopic part 31 to expand and contract is pneumatic driving. The suction head module 2 is connected to a negative pressure air source, and the negative pressure of the negative pressure air source is 53.33 kPa. Only this air pressure value can ensure that the suction nozzle 22 module has sufficient adsorption force to ensure the stability of sucking the chip.

[0060] By separating the variable pitch module 3 from the moving main frame 1, the driving structure drives the moving main frame 1 and multiple suction head modules 2 to move together. The suction head module 2 sucks the chip and transports it to the designated location. When the distances in the chip incoming materials are different and the distances between the suction head modules 2 need to be adjusted, when each suction head module 2 is moved close to the variable pitch module 3, the telescopic part 31 extends to clamp the corresponding suction head module 2. As the moving main frame 1 moves, the suction head module 2 moves relative to the sliding shaft 11, causing the distance between two adjacent suction head modules 2 to change, completing the adjustment of the distances between the suction head modules 2. Moreover, each movement only adjusts the distance of one suction head module 2, enabling the diversification of the distances between the suction head modules 2 to adapt to the chip distances in different tapes and realizing flexible adjustment of the distances between the suction head modules 2.

[0061] In one embodiment, the suction head module 2 includes: a telescopic rod 21 with an air passage, a suction nozzle 22 communicated with the air passage, and a sliding member 23 slidably connected to the telescopic rod 21; the sliding member 23 is slidably connected to the sliding shaft 11.

[0062] The telescopic rod 21 can telescopically move relative to the sliding member 23, and thus can adjust the relative vertical height between the suction nozzles 22 to adapt to the chips on different tapes. Since the telescopic degree of the telescopic rod 21 is different, when the hair washing module descends to the chip tape, the telescopic rod 21 at a high position cannot suck the chip. Therefore, adjusting the telescopic degree of the telescopic rod 21 can flexibly select and use the corresponding telescopic rod 21 to suck the chip.

[0063] Specifically, there is a predetermined frictional force between the telescopic rod 21 and the sliding member 23, that is, without a predetermined external force, the telescopic rod 21 cannot be pushed to move relative to the sliding member 23.

[0064] Specifically, the air duct is connected to a negative pressure air source. The air duct is connected to the suction nozzle 22, and the suction nozzle 22 can suck the chip through negative pressure.

[0065] In one embodiment, the number of the sliding shafts 11 is two, and the two sliding shafts 11 are arranged in parallel; both of the two sliding shafts 11 pass through the suction head module 2. Arranging two sliding shafts 11 can ensure that the suction head module 2 cannot rotate around any one of the sliding shafts 11, ensure that the suction nozzle 22 always faces downward, and improve the ability of the suction nozzle 22 to better suck the chip.

[0066] Specifically, the sliding shaft 11 is cylindrical. Using a cylindrical shape can facilitate the better sliding of the suction head module 2.

[0067] In one embodiment, the sliding member 23 includes: a first sliding block 231 and a second sliding block 232; both the first sliding block 231 and the second sliding block 232 are provided with first through holes 233 for the sliding shafts 11 to pass through; both the first sliding block 231 and the second sliding block 232 are provided with second through holes 234 for the telescopic rod 21 to pass through. Dividing the sliding member 23 into the first sliding block 231 and the second sliding block 232, using two sliding blocks can improve the telescopic stability and movement stability compared to only one sliding block. At the same time, the two sliding blocks are arranged at intervals, which has a good stabilizing effect on the passing telescopic rod 21. Compared with using a whole large sliding member 23 with the same stability ability, dividing the sliding member 23 into the first sliding block 231 and the second sliding block 232 can reduce the weight of the sliding member 23, reduce the moment of inertia of the moving frame, and at the same time can save the use of materials and reduce the production cost.

[0068] The first sliding block 231 and the second sliding block 232 are fixedly connected by a connecting block; the two sliding shafts 11 respectively pass through the first sliding block 231 and the second sliding block 232.

[0069] In one embodiment, the suction nozzle 22 and the air duct are detachably connected together by a connecting member 24. By detachably connecting the suction nozzle 22 and the air duct, it is convenient to disassemble and replace the suction nozzle 22.

[0070] Specifically, the suction nozzle 22 is threadedly connected to the air passage.

[0071] In one embodiment, the connecting member 24 includes: a first buckle member 241 and a second buckle member 242; the first buckle member 241 has a third through hole 243 sleeved outside the telescopic rod 21, a first spring 244 is arranged in the third through hole 243, and the first buckle member 241 can slide relative to the telescopic rod 21 by squeezing the first spring 244; a flow passage communicating with the air passage is formed in the second buckle member 242, and the suction nozzle 22 communicates with the flow passage; the first buckle member 241 and the second buckle member 242 respectively have corresponding first hooks 245 and second hooks 246; the first hook 245 and the second hook 246 are in snap-fit. When the first hook 245 and the second hook 246 are in snap-fit, the first spring 244 pushes the first buckle member 241, so that the first hook 245 and the second hook 246 always remain in the snap-fit state. When an external force is applied to move the first buckle member 241, the first hook 245 slides out from the second hook 246, realizing the separation of the first buckle member 241 and the second buckle member 242, and realizing the separation of the suction nozzle 22 and the telescopic rod 21, which is convenient for quickly replacing the type of the suction nozzle 22 to better adapt to the picking and handling of different chips.

[0072] Specifically, please refer to Figure 8 A connecting groove 28 is formed in the second buckle member 242, the clamping groove 26 is arranged on the inner side wall of the connecting groove 28, and the clamping groove 26 has a lifting section. The limit pin 25 is fixedly arranged on the bottom side of the telescopic rod 21. After the bottom of the telescopic rod 21 slides into the connecting groove 28, the limit pin 25 also slides in the clamping groove 26. When the limit pin 25 slides to the lifting section, the limit pin 25 is lifted, resulting in an increase in the abutting pressure between the bottom of the telescopic rod 21 and the bottom of the connecting groove 28, and improving the airtightness of the connection between the air passage of the telescopic rod 21 and the flow passage of the second buckle member 242; at the same time, the second hook 246 is located at one end of the second buckle member 242, and the second hook 246 is spaced from the clamping groove 26. When the limit pin 25 is located at the lifting section, the first hook 245 and the second hook 246 are in snap-fit. The combined action of the snap-fit of the first hook 245 and the second hook 246 and the limit pin 25 located at the lifting section improves the airtightness of the connection between the air passage of the telescopic rod 21 and the flow passage of the second buckle member 242.

[0073] Specifically, the plane where the first hook 245 and the second hook 246 are in snap-contact is parallel to the bottom plane of the lifting section. Such a setting can avoid the situation that the plane where the first hook 245 and the second hook 246 are in snap-contact is uneven, resulting in a corresponding resultant force that causes the first hook 245 and the second hook 246 to automatically slide and separate.

[0074] Specifically, please refer to Figure 7The card slot 26 is hook-shaped, and the second hook 246 and the card slot 26 are spaced apart and distributed at both ends of the second buckle member 242; when the second hook 246 is buckled with the first hook 245, the card slot 26 is hooked on the limit pin 25. The forces received by the card slot 26 and the second hook 246 are such that the directions of the two forces are more parallel. This makes the component forces after the resultant force smaller, thus improving the airtightness of the connection between the air passage of the telescopic rod 21 and the flow passage of the second buckle member 242.

[0075] The connector 24 can be threadedly connected to the lower end of the telescopic rod 21.

[0076] The number of flow passages and suction nozzles 22 in each connector 24 is a corresponding multiple. The multiple suction nozzles 22 can improve the handling efficiency of the chip.

[0077] In one embodiment, a limit pin 25 is fixedly connected to the telescopic rod 21, and a card slot 26 for the limit pin 25 to be inserted into is provided on the second hook 246; in the state where the first hook 245 and the second hook 246 are buckled and connected, the limit pin 25 and the card slot 26 are in contact. The cooperation of the limit pin 25 and the card slot 26 can improve the firmness of the connection between the first hook 245 and the second hook 246. At the same time, the setting of the limit pin 25 can reduce the situation where the second hook 246 slides out of the first hook 245. This ensures the firmness of the connection.

[0078] Specifically, in the case where the first hook 245 and the second hook 246 are mutually buckled, in the direction in which the first buckle member 241 can move relative to the telescopic rod 21, the protruding length of the second buckle member 242 is greater than the protruding length of the first buckle member 241. This setting can ensure that when the telescopic rod 21 moves on a horizontal plane and encounters an obstacle, the second buckle member 242 touches the obstacle first, avoiding the situation where the first buckle member 241 touches the obstacle and then squeezes the first spring 244, causing the first hook 245 and the second hook 246 to separate. This ensures the stability of the connection.

[0079] Specifically, the resultant force of the first hook 245 and the second hook 246 is the first resultant force, the resultant force of the limit pin 25 and the card slot 26 is the second resultant force, and the resultant force of the second hook 246 and the bottom of the telescopic rod 21 is the third resultant force. The resultant force of the second resultant force and the third resultant force is in two-force balance with the first resultant force.

[0080] In one embodiment, the pitch-changing module 3 includes: a frame body 32; the telescopic part 31 includes: a first telescopic member 311; the first telescopic member 311 includes: a slider 3111, a slide rail 3112, a clamping rod 3113, and a telescopic cylinder 3114; the frame body 32 is fixedly connected to the machine table; the slide rail 3112 is fixedly connected to the frame body 32; the slider 3111 is slidably connected to the slide rail 3112; the telescopic end of the telescopic cylinder 3114 is hinged to the slider 3111; one end of the clamping rod 3113 has a clamping groove 3115 for clamping the suction head module 2, and the other end is fixedly connected to the slider 3111.

[0081] Specifically, the telescopic cylinder 3114 is fixedly connected to the frame body 32 through a fixing block; the telescopic direction of the telescopic end is parallel to the sliding direction of the slider 3111.

[0082] Specifically, the suction nozzle 22 is threadedly connected or clamped to the flow channel. The suction nozzle 22 has a rubber head.

[0083] Specifically, a first sensor 4 is further provided on the second slider 232, and a second sensor 5 for detecting the moving position of the suction nozzle 22 module is provided on the frame body 32. The first sensor 4 and the second sensor 5 are used to detect whether the clamping groove 3115 extends or retracts to a specified position, ensuring that the clamping rod 3113 can be clamped on the telescopic rod 21 during both extension and retraction, and improving the efficiency of clamping and pitch adjustment.

[0084] In one embodiment, a limiting block 2311 is hinged to the first slider 231, and a convex block 2312 for engaging with the limiting block 2311 is provided on the telescopic rod 21; a second spring 27 is sleeved on the lower part of the telescopic rod 21; and one end of the second spring 27 abuts against the lower end of the telescopic rod 21, and the other end abuts against the second slider 232.

[0085] When the moving main frame 1 moves downward, causing the lower end of the telescopic rod 21 to contact the ground, the telescopic rod 21 and the second slider 232 jointly compress the second spring 27, and the telescopic rod 21 moves upward relative to the first slider 231 and the second slider 232. When the position of the convex block 2312 on the telescopic rod 21 is higher than the limiting block 2311, the limiting block 2311 is snapped under the convex block 2312, preventing the telescopic rod 21 from moving downward under the elastic force of the second spring 27. When it is necessary to use the suction nozzle 22 in the telescopic rod 21 for work, only the limiting block 2311 and the convex block 2312 need to be separated, and the telescopic rod 21 moves downward under the elastic force of the second spring 27. If the limiting block 2311 and the convex block 2312 are not separated, the telescopic rod 21 cannot move downward, so the telescopic rod 21 is in the high position; in the vertical direction, when sucking and transporting the chip, it is always the lower telescopic rod 21 that is working. This design enables the staff to flexibly select the corresponding telescopic rod 21 for work.

[0086] Specifically, a shrapnel for pushing the limiting block 2311 to rotate is provided on the first sliding block 231. The limiting block 2311 abuts against the upper part of the telescopic rod 21 under the elastic force of the shrapnel. The function of the shrapnel is to push the limiting block 2311 to rotate. When the position of the convex block 2312 on the telescopic rod 21 is higher than the limiting block 2311, the limiting block 2311 is pushed to rotate and snap under the convex block 2312 under the elastic force of the shrapnel. This avoids the situation where workers need to manually rotate the limiting block 2311 to snap into the convex block 2312.

[0087] In one embodiment, the telescopic part 31 further includes: a second telescopic member 312 arranged at an interval from the first telescopic member 311; the structure of the second telescopic member 312 is the same as that of the first telescopic member 311; the clamping rod 3113 of the second telescopic member 312 can abut against the limiting block 2311. When the second telescopic member 312 extends, it can just abut against the limiting block 2311 and push the limiting block 2311 away from the convex block 2312.

[0088] The second telescopic member 312 is used to separate the limiting block 2311 and the convex block 2312, which facilitates the rapid movement of the telescopic rod 21. There is no need to manually separate the limiting block 2311 and the convex block 2312. This reduces the workload of the staff.

[0089] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, replacements, and variations to the above embodiments within the scope of the present invention.

Claims

1. A pitch changing device, comprising a machine platform, wherein the machine platform has a driving structure, characterized in that: Also includes: Mobile main frame, multiple suction head modules, variable distance modules; The movable main frame is slidably arranged on the machine platform, and the movable main frame is transmission-connected with the driving structure; a sliding shaft is fixedly arranged on the movable main frame; the sliding shaft passes through each of the suction head modules, and the suction head modules are slidably connected with the sliding shaft; The variable distance module is fixedly arranged on the machine platform, and the variable distance module has a telescopic part which can be used to clamp and limit the suction head module; The movable main frame and the variable pitch module are spaced apart on the machine platform; The suction head module comprises: a telescopic rod with an airway, a suction nozzle connected to the airway, and a sliding member slidably connected to the telescopic rod; the sliding member is slidably connected to the sliding shaft; the suction nozzle and the airway are detachably connected together through a connecting member; the connecting member comprises: a first clip and a second clip; a connecting groove is provided on the second clip, the clip groove is arranged on the inner side wall of the connecting groove, and the clip groove has a lifting section, and a limit pin is fixedly arranged on the bottom side of the telescopic rod, and after the bottom of the telescopic rod slides into the connecting groove, the limit pin also slides in the clip groove; A first sliding block and a second sliding block; the first sliding block and the second sliding block are both provided with a first through hole for the sliding shaft to pass through; the first sliding block and the second sliding block are both provided with a second through hole for the telescopic rod to pass through; a limit block is hingedly connected to the first sliding block, and a protrusion for the limit block to be engaged is provided on the telescopic rod; a second spring is sleeved on the lower part of the telescopic rod; and one end of the second spring abuts against the lower end of the telescopic rod, and the other end abuts against the second sliding block.

2. The pitch changing device according to claim 1, characterized in that: The number of the sliding shafts is two, and the two sliding shafts are arranged in parallel; the two sliding shafts both pass through the suction head module.

3. The pitch changing device according to claim 2, characterized in that: The variable distance module includes: a frame; the telescopic part includes: a first telescopic part; the first telescopic part includes: a slider, a slide rail, a clamping rod, and a telescopic cylinder; the frame is fixedly connected to the machine; the slide rail is fixedly connected to the frame; the slider is slidably connected to the slide rail; the telescopic end of the telescopic cylinder is hinged to the slider; one end of the clamping rod has a clamping groove for clamping the suction head module, and the other end is fixedly connected to the slider.

4. The pitch changing device according to claim 3, characterized in that: The telescopic part further comprises: a second telescopic member spaced apart from the first telescopic member; the structure of the second telescopic member is the same as that of the first telescopic member; and a clamping rod of the second telescopic member can abut against the limit block.

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