An automated tensioner assembly assembly system

Abstract

The application discloses a tensioner assembly automatic assembly system, which comprises a shell assembly work station, a large tooth frame assembly work station, a guide block assembly work station, a small tooth frame assembly work station, a spring assembly work station and an assembly work station. The large tooth frame assembly work station is suitable for assembling a large tooth frame into an inner groove of a shell to form a shell assembly. The small tooth frame assembly work station and the spring assembly work station are suitable for assembling the small tooth frame into an inner groove of the guide block and assembling the spring into an outer wall of the guide block to form a guide block assembly. The assembly work station is suitable for assembling the shell assembly and the guide block assembly to form a tensioner assembly. The oiling process of the outer wall of the guide block is arranged behind the spring assembly work station, so that the oil loss is reduced, and the oil stain problem in the system is reduced. When the oiling is performed, the spring can be compressed, the outer wall of the guide block is exposed when the spring is deformed, and thus the oiling can be directly performed.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts manufacturing, and in particular to an automated assembly system for a tensioner assembly. Background Art

[0002] The assembly of a type I tensioner assembly generally involves the following steps: (1) assembling the housing and the large tooth frame to form the housing assembly; (2) assembling the guide block, small tooth frame, and spring to form the guide block assembly; (3) installing the tooth block and brushing oil into the groove; and (4) assembling the housing assembly and the guide block assembly to form the tensioner assembly. After assembly, the spring pressure during assembly must be tested to ensure it is less than the set value to meet technical requirements, and then the material is printed and discharged.

[0003] When installing the tooth block groove, brushing oil mainly means oiling the inner groove and outer wall of the guide block. In the past, the guide block was directly coated inside and outside at the same time when oiling. When installing the small tooth bracket, it was directly installed in the inner groove of the guide block. At this time, the impact was not significant. When the guide block assembly is installed inside the housing assembly, the oil is easily lost due to too long time after the outer side of the guide block is oiled, resulting in insufficient oil. At the same time, oil drips into the assembly system, causing oil contamination. Summary of the Invention

[0004] The purpose of this application is to provide an automated assembly system for a tensioner assembly.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: an automated assembly system for a tensioner assembly, which is used to assemble and form a housing, a large tooth rack, a guide block, a small tooth rack and a spring, and mainly includes a housing assembly station, a large tooth rack assembly station, a guide block assembly station, a small tooth rack assembly station, a spring assembly station and a component assembly station, wherein the large tooth rack assembly station is suitable for assembling the large tooth rack into the inner groove of the housing to form a housing assembly, the small tooth rack assembly station and the spring assembly station are suitable for assembling the small tooth rack into the inner groove of the guide block and assembling the spring into the outer wall of the guide block to form a guide block assembly, and the component assembly station is suitable for assembling the housing assembly and the guide block assembly to form a tensioner assembly;

[0006] The automated assembly system also includes a first oiling station arranged between the guide block assembly station and the small tooth rack assembly station, and a second oiling station arranged between the spring assembly station and the component assembly station. The first oiling station is suitable for oiling the inner groove of the guide block before assembling the small tooth rack. The second oiling station includes an oiling groove with an inner diameter greater than or equal to the outer wall of the guide block and smaller than the outer diameter of the spring. The second oiling station is suitable for oiling the outer wall of the guide block of the guide block assembly after the spring is assembled and before the component assembly station. During the process, the oiling groove first moves toward one side of the guide block and compresses the spring to avoid the outer wall of the guide block to be oiled.

[0007] As a preferred embodiment, the first oiling station and the second oiling station are both provided with a metering valve, the first oiling station comprises a first transfer portion and a first oiling block, and the second oiling station comprises a second transfer portion and a second oiling block;

[0008] The first oiling block is controlled by the first transfer unit to enter and leave the inner groove of the guide block from the top of the guide block, and is oiled through the metering valve during the leaving process;

[0009] The oiling groove is formed inside the second oiling block, and the second transferring part controls the second oiling block to start from the bottom of the guide block, wrap the outer wall of the guide block, and move upward first and then downward. During the upward movement process, it abuts and compresses the spring, and during the downward movement process, quantitative oiling is performed through the quantitative valve.

[0010] As a preference, the second oiling station further includes a flip loading mechanism and a transverse movement mechanism, and the component assembly station includes a guide block component loading mechanism.

[0011] After the guide block assembly is assembled in the workstation by the spring assembly, it is in a horizontal state. The flip loading mechanism is suitable for clamping and picking up the guide block assembly in the horizontal state from both ends toward the inside, flipping it 90°, and then moving it horizontally to the transverse mechanism. The transverse mechanism clamps and picks up the guide block assembly from the side of the guide block assembly, and clamps the guide block and the spring at the same time during the process, and then moves it horizontally and transfers it to the top of the second oiling block. The second transfer part is suitable for driving the second oiling block to rise, compressing the spring to the oiling height during the process, and then the second transfer part drives the second oiling block to descend and oils it during the process, and the spring recovers with the descending process; after oiling, the guide block assembly loading mechanism fixes the guide block assembly by the top of the guide block and moves it to the component assembly workstation for assembly.

[0012] As a preferred embodiment, a first oil outlet hole is provided at the bottom of the outer wall of the first oiling block, and oil is discharged through the first oil outlet hole during the process of the first oiling block entering the bottom of the inner groove of the guide block and rising;

[0013] The second oiling block is provided with a second oil outlet at the top of its inner cavity; the inner cavity of the second oiling block is provided with an avoidance space below the second bottom, and the avoidance space does not contact the bottom part of the guide block; during assembly, the bottom of the guide block assembly is inserted into the top of the shell assembly.

[0014] As a preferred embodiment, the automatic assembly equipment includes a first workbench and a second workbench, the shell assembly station, the large rack assembly station and the component assembly station are all arranged on the first workbench; the guide block assembly station, the first oiling station, the small rack assembly station and the spring assembly station are all arranged on the second workbench; the second oiling station is arranged in the middle part between the first workbench and the second workbench.

[0015] As a preferred embodiment, the first workbench and the second workbench are both divider turntables, and a mounting area is provided in the middle of the divider turntable, the mounting area does not rotate with the divider turntable, and the workpiece is transferred by the rotation of the divider turntable;

[0016] The first workbench is provided with a shell fixing mechanism at each workstation thereof, and a positioning hole for vertical insertion of the shell is provided at the middle of the top of the shell fixing mechanism;

[0017] A guide block positioning mechanism is provided on each workstation of the second workbench, and the guide block positioning mechanism includes a guide block center positioning part, a guide block clamping part and a guide block support structure. The installation area in the middle of the second workbench is provided with an ejection mechanism. During installation, the guide block is placed on the guide block support structure, and the first end and the bottom of the guide block are both against the guide block support structure. When the ejection mechanism is working, it is suitable for acting on the guide block clamping part so that the guide block clamping part abuts against the other end of the guide block to complete the positioning of the guide block.

[0018] As a preferred embodiment, the housing fixing mechanism includes a spring locking assembly, which forms a restricted state and a release state by lateral movement. The installation area in the center of the first workbench is provided with a plurality of driving mechanisms, and the spring locking assembly rotates synchronously with the first workbench. The driving mechanism cooperates with the spring locking assembly at a set position to drive the spring locking assembly to move to switch the working state; the guide block assembly is provided with one end of the spring inserted into the housing, and the spring locking assembly acts on the top end of the guide block;

[0019] The spring locking assembly includes a positioning portion that can be laterally moved toward the direction of the shell fixing mechanism and a transmission portion arranged on the outside of the positioning portion. The driving mechanism is provided with a transmission groove, and a limiting structure is provided at the end of the transmission portion. When the shell rotates to the set position, the limiting structure rotates into the range of the transmission groove. When the driving mechanism is extended, it acts on the limiting structure and the transmission portion to move the positioning portion toward the shell and clamp it. Before leaving the position, the driving mechanism is reset, and the action on the limiting structure and the transmission portion is correspondingly released.

[0020] As a preferred embodiment, the automated assembly system also includes an elastic force detection station, which is arranged on the first workbench and located behind the component assembly station. The elastic force detection station includes a testing mechanism for elastically compressing the tensioner assembly, and the testing mechanism includes a test head, a pressure sensor and a displacement sensor. The pressure sensor is used to record the force applied when the tensioner assembly is elastically compressed, and the displacement sensor is used to record the corresponding displacement distance of the tensioner assembly when it is under pressure in the recording state of the pressure sensor. The spring locking assembly is suitable for restricting the assembled tensioner assembly during the process to prevent parts from scattering due to sudden resetting of the spring in the tensioner assembly after the pressure test of the tensioner assembly is completed.

[0021] As a preferred embodiment, the automated assembly system further comprises a safety lock clamp assembly station, a defective product rejection station and a finished product inkjet printing and discharging station; the safety lock clamp is used to limit the elastic deformation of the tensioner assembly;

[0022] The workpieces that pass the inspection at the elastic force inspection station are installed with safety lock clamps at the safety lock clamp assembly station, and then enter the finished product coding and discharging station for coding and discharging. The workpieces that fail the inspection at the elastic force inspection station are rejected by the defective product rejection station.

[0023] As a preference, the automated assembly system includes several loading mechanisms, which provide accommodation space and perform quantitative loading for one or more of the shell, large tooth rack, small tooth rack, guide block, and spring, and the loading mechanism includes a shortage sensing structure and a full material sensing structure.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] On the one hand, the present application sets the oiling process of the outer wall of the guide block behind the spring assembly station. After the spring is assembled to form the guide block assembly, it is oiled and immediately assembled with the shell assembly. This can reduce oil loss, thereby ensuring that the oil performance is not affected after the installation is completed, and effectively reduce the oil pollution problem inside the assembly system.

[0026] On the other hand, the inner diameter of the oiling groove, the outer diameter of the outer wall of the guide block and the outer diameter of the spring are limited so that the spring can be compressed during oiling, and the outer wall of the guide block is exposed when the spring is deformed, thereby facilitating direct contact for oil coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 2 yes Figure 1A top view from another angle after part of the outer shell is removed.

[0029] Figure 3 yes Figure 2 Schematic diagram of the combined structure of the second oiling station and part of the assembly station structure.

[0030] Figure 4 yes Figure 3 An enlarged schematic diagram of the structure at another angle.

[0031] Figure 5 yes Figure 3 Schematic diagram of the structure in a top-down view.

[0032] Figure 6 It is a schematic diagram of the shell assembly station.

[0033] Figure 7 This is a schematic diagram of the large tooth frame group entering the work station.

[0034] Figure 8 It is a schematic diagram of the guide block assembly entering the work station.

[0035] Figure 9 This is a schematic diagram of the first oiling station.

[0036] Figure 10 This is a schematic diagram of the first oiler standing at another angle.

[0037] Figure 11 This is a schematic diagram of the small tooth rack group entering the work station.

[0038] Figure 12 It is a schematic diagram of the spring assembly station.

[0039] Figure 13 This is a schematic diagram of the spring assembly station from another angle.

[0040] Figure 14 This is a schematic diagram of the elastic force testing station.

[0041] Figure 15 is a schematic diagram of the safety lock clip assembly station.

[0042] Figure 16 This is a schematic diagram of the defective product rejection station and the finished product coding and discharge station.

[0043] Figure 17 is a schematic diagram of the tensioner assembly.

[0044] Figure 18 yes Figure 17 Schematic diagram of the dispersion of the structure.

[0045] In the figure: 1. Assembly station; 2. Oiling control cabinet; 3. Loading station; 4. Second workbench; 5. First workbench; 6. Inkjet printer; 7. Guide block assembly station; 71. CCD camera; 72. Guide block clamp; 73. Guide block support structure; 74. Guide block flipping structure; 8. First oiling station; 82. First transfer unit; 9. Small tooth rack assembly station; 10. Spring assembly station; 101. Translational walking structure; 102. Guide rail; 103. Spring clamp; 104. Guide block clamping structure; 11. Component assembly station; 111. Housing component fixing clamp; 112. Guide block component driving unit; 113. Guide block component loading mechanism; 12. Housing assembly station; 13. Large tooth rack assembly station; 14. Elastic force detection station; 141. Test head; 142. Displacement sensor; 15. Safety lock clamp assembly station; 16. Defective products Rejection station; 17. Finished product inkjet printing discharge station; 18. Flip loading mechanism; 181. Flip unit; 182. Transverse shift unit; 183. First drive unit; 184. Guide block assembly clamp; 19. Transverse shift mechanism; 191. Second drive unit; 192. Position-limiting transverse shift block; 193. Oiling material transfer clamp; 20. Guide block positioning mechanism; 21. Housing fixing mechanism; 22. Housing; 24. Spring locking assembly; 25. Guide block; 26. Spring; 27. Safety lock clamp; 311. Large tooth rack clamp; 312. Large tooth rack loading channel; 31. Large tooth rack loading tray; 32. Guide block loading tray; 33. Small tooth rack loading tray; 34. Spring loading tray; 35. Safety lock clamp loading tray; 36. Shell loading tray; 361. Shell loading channel; 28. Second oiling station; 281. Second oiling block; 29. ​​Small tooth rack; 30. Large tooth rack. DETAILED DESCRIPTION

[0046] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0047] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating the orientation and position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0048] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0049] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0050] Example:

[0051] Reference Figures 1 to 18 As shown, the present application proposes a tensioner assembly automated assembly system for assembling Figure 18 The shell 22, large tooth frame 30, guide block 25, small tooth frame 29 and spring 26 shown are assembled and formed. The specific assembly steps are as follows: first assemble the shell and the large tooth frame to form a shell assembly; install the small tooth frame into the inner groove of the guide block, and then put the spring on the outside of the guide block to form a guide block assembly. Finally, insert one end of the guide block assembly mounting spring into the inner cavity of the shell. The spring is compressed under the abutment of the shell, and the safety lock clip is installed to keep it as shown. Figure 17 fixed posture, thereby completing the assembly of the tensioner assembly.

[0052] Since the shell assembly and the guide block assembly need to be plugged in and assembled in the end, the preferred shell installation method of this application is vertical, with the inner cavity of the shell facing upwards; so that when the guide block assembly is assembled and plugged in, it is only necessary to flip the guide block assembly to a position where the installation spring end faces downwards and insert it into the shell to complete the assembly. The installation posture of the shell can be referred to Figure 14 .

[0053] This automated assembly system includes a shell assembly station 12, a large tooth rack assembly station 13, a guide block assembly station 7, a small tooth rack assembly station 9, a spring assembly station 10 and a component assembly station 11. The shell assembly station 12 assembles and fixes the shell in a fixed posture. The large tooth rack assembly station 13 is suitable for assembling the large tooth rack into the inner groove of the shell to form a shell assembly; the guide block assembly station 7 assembles and fixes the guide block in a fixed posture, and then the small tooth rack assembly station 9 and the spring assembly station 10 are suitable for assembling the small tooth rack into the inner groove of the guide block and assembling the spring into the outer wall of the guide block to form a guide block assembly; finally, the component assembly station 11 is suitable for assembling the shell assembly and the guide block assembly to form a tensioner assembly.

[0054] The automated assembly system further includes a first oiling station 8 disposed between the guide block assembly station 7 and the small tooth frame assembly station 9 and a second oiling station 28 disposed between the spring assembly station 10 and the component assembly station 11 .

[0055] The first oiling station 8 is suitable for oiling the inner groove of the guide block before the small tooth frame is assembled. The second oiling station 28 includes an oiling groove with an inner diameter greater than or equal to the outer wall of the guide block and smaller than the outer diameter of the spring. The second oiling station 28 is suitable for oiling the outer wall of the guide block of the guide block assembly after the spring is assembled and before the assembly station 11. During the process, the oiling groove first moves toward the guide block and compresses the spring to avoid the outer wall of the guide block to be oiled. Due to the deformation characteristics of the spring, it is difficult to assemble the spring by clamping the two ends of the spring in the present automated assembly process. Therefore, in the present application, the spring needs to be clamped from the side and then moved to the outer wall of the guide block for installation. In addition, the inner wall of the spring and the inner wall of the guide block will inevitably contact each other during the installation process. At this time, if the outer wall of the guide block is oiled first, after the spring is installed, the oil loss on the outer wall of the guide block will be large due to the long time after oiling and the contact during the installation of the spring. On the one hand, it will cause insufficient oil on the surface of the subsequent guide block and affect the performance. On the other hand, the lost oil will drip onto the assembly station and cause oil contamination, which is difficult to clean. Therefore, the present application sets the oiling process of the outer wall of the guide block behind the spring assembly station 10. After the spring is assembled to form the guide block assembly, it is oiled immediately and assembled with the housing assembly immediately after oiling. This can reduce the loss of oil, thereby ensuring that the performance of the oil is not affected after the installation is completed, and effectively reduce the oil pollution problem inside the assembly system.

[0056] Both the first and second oiling stations 8, 28 are equipped with metering valves. These valves control the oil output based on the specific strokes of the first and second oiling stations 8, 28. Given the same assembly process, the metering valves ensure that the oil output is roughly equal each time. The first oiling station includes a first transfer unit 82 and a first oiling block, while the second oiling station 28 includes a second transfer unit and a second oiling block 281.

[0057] The first oiling station 8 oils the inner groove of the guide block. The first oiling block is controlled by the first transfer unit 82 to enter and leave the inner groove of the guide block from the top of the guide block, and is oiled through a metering valve during the leaving process. At this time, the oiling hole of the first oiling block is preferably set on the outside of its bottom. In the process of the first oiling block moving upward from the bottom of the inner groove of the guide block, the bottom of the first oiling block begins to oil the bottom of the inner groove of the guide block until the first oiling block leaves the inner groove of the guide block. The depth of the inner groove of the guide block may change, and the shape of the corresponding first oiling block only needs to match the shape of the inner groove of the guide block. Please refer to Figure 9 、 Figure 10 As shown, Figure 10An oiling block is provided at the bottom of the first transfer portion 82, and the oiling block enters the inner groove of the guide block fixed by the guide block positioning mechanism to apply oil.

[0058] Installing the spring first and then lubricating the guide block's outer wall presents difficulties because the spring blocks the lubricating equipment from directly contacting the guide block's outer wall. This poses the challenge of how the lubricating station can evenly apply the oil to the guide block's outer wall. Conventional contact lubrication requires consideration of how to prevent the spring from falling off while also addressing the spring's obstruction. The following proposes a specific solution for a second lubricating station 28 to address this difficulty in lubricating the guide block's outer wall after spring installation.

[0059] The second oiling station 28 oils the outer wall of the guide block. The second transfer unit controls the second oiling block 281 to start from the bottom of the guide block, wrap the outer wall of the guide block, and move it up first and then down. During the upward movement, the spring is compressed and limited. During the downward movement, the quantitative valve is used to apply quantitative oil. Figure 4 、 Figure 5 As shown, when oiling, the guide block assembly is installed with the spring side facing downward. At this time, the structure used to fix the guide block assembly needs to clamp the spring at the same time so that the spring does not fall off in this posture; then the second oiling block 281 rises, starting from the bottom of the guide block assembly, and continues to rise after contacting the spring, and compresses the spring. When the spring is compressed, the outer wall of the guide block is exposed. At this time and during the subsequent descent of the second oiling block 281, the second oiling block 281 can be wrapped around the outer wall of the guide block for oiling, and the oiling is not affected by the spring.

[0060] like Figure 1 、 Figure 2 As shown, the automatic assembly equipment includes a first workbench 5 and a second workbench 4. Preferably, the first workbench 5 and the second workbench 4 are both in the form of a divider turntable. The shell assembly station 12, the large tooth rack assembly station 13 and the component assembly station 11 are all arranged on the first workbench 5, while the guide block assembly station 7, the first oiling station 8 for oiling the guide block inner groove, the small tooth rack assembly station 9 and the spring assembly station 10 are arranged on the second workbench 4. In some embodiments, the workbench can also be in the form of a long table. In this case, the automatic assembly equipment forms a linear assembly line, and then the two assembly lines converge at the component assembly station 11. This application takes the turntable form as an example for explanation.

[0061] The working principle of the guide shoe assembly and the housing assembly during assembly will be described in detail below in conjunction with the structures of the second oiling station 28 and the assembly part assembly station.

[0062] The second oiling station 28 further includes a transverse moving part 182 and a transverse moving mechanism 19, and the component assembly station 11 includes a guide block assembly loading mechanism 113, which is driven by a guide block assembly driving part 112. The transverse moving mechanism 19 includes a second driving part 191, a position limiting transverse moving block 192 and an oiling material moving clamp 193. Figure 3 、 Figure 4 As shown, the transverse moving part 182, the transverse moving mechanism 19 and the guide block assembly feeding mechanism 113 are schematic diagrams of their different working states. Figure 3 The guide block positioning mechanism at the bottom is taken out, turned over and moved to the corresponding position of the transverse mechanism 19. At this time, the transverse mechanism 19 clamps the guide block assembly, and the transverse part 182 releases the guide block assembly. The transverse mechanism 19 moves the guide block assembly transversely to the second oiling station 28. After oiling, the transverse mechanism 19 returns the guide block assembly (at this time, Figure 3 The left position of the limit traverse block 192 shown in FIG), and then the guide block assembly feeding mechanism 113 is Figure 3 The guide block assembly is removed by moving from the upper part to the lower part, and the lateral movement mechanism releases the guide block assembly. The guide block assembly loading mechanism 113 sends the guide block assembly to the shell fixing mechanism 21 of the first workbench 5, and then the guide block pressing mechanism is set to assemble it. The lateral movement part 182 can be Figure 3 、 Figure 4 The flipping portion 181, the transverse portion, the first driving portion 183, and the guide block assembly clamp 184 shown are used to complete the material picking and feeding. The first driving portion 183 drives the transverse portion to move transversely. The flipping portion 181 is provided on the transverse portion, and the guide block assembly clamp 184 is provided on the flipping portion 181. Without further explanation, the driving portion and driving mechanism in this application can be selected from suitable driving devices such as cylinders and motors according to their linear travel or rotational travel.

[0063] The guide block positioning mechanism for positioning the guide block on the second workbench 4 is as follows: Figure 9 As shown, after the guide block is installed, it is in a horizontal position. The guide block assembly assembled by the spring assembly into the workstation 10 is also initially in a horizontal position. At this time, the transverse moving portion 182 is suitable for clamping and lifting the guide block assembly in the horizontal position from both ends, turning it 90 degrees, and then transversely moving it to the transverse moving mechanism. The transverse moving mechanism clamps and lifts the guide block assembly from the side of the guide block assembly, and in the process, simultaneously clamps the guide block and the spring, and then transversely moves and transfers it to the top of the second oiling block 281. The second transfer portion is suitable for driving the second oiling block 281 to rise, compressing the spring to the oiling height during the process, and then the second transfer portion drives the second oiling block 281 to descend and oil it during the process, while the spring recovers during the descending process; after oiling, the guide block assembly loading mechanism 113 fixes the guide block assembly at the top of the guide block and moves it to the assembly assembly workstation 11 for assembly.

[0064] To ensure uniform oiling of the guide block's outer wall, it is preferred to oil the guide block in a vertical position. If oiling is done in a horizontal position, then due to gravity, there will be less oil on the top of the guide block and more oil on the bottom of the guide block, which will not only make the oiling less uniform, but also easily lead to oil dripping. When oiling in a vertical position, at least when oiling, the circumference of the guide block is evenly oiled at the same height. At the same time, the top side is oiled first. Even if the oil flows slowly downward, due to the longer bottom length of the guide block, it will rarely drip out of the guide block. However, relatively speaking, after the guide block has been oiled in a vertical position for a certain period of time, there is relatively more oil at the bottom of the guide block. However, during assembly, this phenomenon actually has an advantage: the guide block and the housing inner cavity are in contact when they first connect. If the oil at the bottom of the guide block and the oil at other locations on the guide block are relatively uniform, after installation, due to the guide block contacting the housing inner cavity when entering the housing, some oil will be lost. As a result, after the guide block bottom is installed on the bottom of the housing, the oil at the bottom of the guide block is relatively less. Therefore, this arrangement has the effect of further evenly distributing the oil after the guide block assembly is fully installed inside the housing assembly. The relatively short time from the second oiling station 28 to the assembly station 11 after oiling can prevent oil from escaping from the guide block, thereby achieving a better overall oiling effect.

[0065] Preferably, the outer bottom wall of the first oiling block is provided with a first oiling hole. As the first oiling block enters the bottom of the inner groove of the guide block and rises, oil is discharged through the first oiling hole. The guide block inner groove is oiled primarily to facilitate the installation and movement of the small tooth carrier within its inner groove. Since the small tooth carrier and guide block are assembled from the outset, the first oiling station 8 can perform oiling immediately before the two are assembled.

[0066] The second oiling block 281 preferably has a second oil outlet at the top of its inner cavity. A clearance space is provided in the portion of the inner cavity of the second oiling block 281 below the second bottom portion, so that the clearance space does not contact the bottom portion of the guide block. Since the oiling block rises from the bottom to supply and apply oil, its bottom portion requires a certain thickness to facilitate and quantitatively supply oil. However, the second oil outlet is relatively small (a larger outlet would make oil flow difficult to control). Therefore, to prevent or reduce oil contamination of the second oiling block 281, a clearance space is provided in the lower middle portion of the oiling groove of the second oiling block 281 (i.e., below the second oil outlet). This effectively prevents oil contamination of the second oiling block 281, thereby preventing or reducing oil contamination there.

[0067] like Figures 2 to 16As shown, the guide block assembly station 7, the first oiling station 8, the small tooth frame assembly station 9, and the spring assembly station 10 are all located on the second workbench 4; the second oiling station 28 is located between the first workbench 5 and the second workbench 4. The first workbench 5 and the second workbench 4 are preferably a divider turntable, and the middle of the divider turntable is provided with a mounting area. The mounting area does not rotate with the divider turntable, and the workpiece is transferred by the rotation of the divider turntable.

[0068] In order to facilitate the fixing of the shell, the first workbench 5 is provided with a shell fixing mechanism 21 at each station thereof, and a positioning hole for vertical insertion of the shell is provided at the top middle portion of the shell fixing mechanism 21. Figure 7 、 Figure 14 and Figure 15 As shown, the shell fixing mechanism 21 includes a seat for limiting the movement of the shell. A spring locking assembly that can be moved laterally is set on the outside of the seat. The spring locking assembly forms a restricted state and a release state through lateral adjustment. The installation area in the center of the first workbench 5 is provided with multiple driving mechanisms. The spring locking assembly rotates synchronously with the first workbench 5. The driving mechanism cooperates with the spring locking assembly at the set position to drive the spring locking assembly to move to switch the working state. The guide block assembly is installed with one end of the spring inserted into the shell, and the spring locking assembly acts on the top of the guide block. Of course, the fixing groove of the seat can be set to a semi-open form. When the shell is installed, the outside of the shell and the inside of the fixing groove of the seat are against each other, and the outside can be driven close by the driving mechanism for clamping. Alternatively, the spring locking assembly can be made into a movable clamping structure.

[0069] like Figure 7 、 Figure 14 and Figure 15 As shown, the preferred spring locking assembly includes a positioning portion that can be laterally moved toward the housing fixing mechanism 21 and a transmission portion arranged outside the positioning portion. The driving mechanism is provided with a transmission groove, and a limiting structure is provided at the end of the transmission portion. When the housing rotates to the set position, the limiting structure rotates into the range of the transmission groove. When the driving mechanism is extended, it acts on the limiting structure and the transmission portion to move the positioning portion toward the housing and clamp it. Before leaving the position, the driving mechanism is reset, and the effect on the limiting structure and the transmission portion is correspondingly released. The positioning portion is arranged as follows Figure 15 The hook shown has a top portion that limits the ejection of the guide block / spring.

[0070] When assembling components, Figure 3 As shown, the first workbench 5 can also be provided with a shell assembly fixing clamp 111, which clamps the outer wall of the shell on the basis of the shell fixing mechanism 21, thereby performing auxiliary clamping. Figure 15 As shown, it can be set at multiple stations and be set above the shell fixing mechanism 21. Figure 15 The middle jaw is shown in two clamping states for illustration purposes only; in reality, the jaw can only be in either clamping or releasing state at the same time.

[0071] like Figure 12 As shown, in order to facilitate the fixing of the guide block, a guide block positioning mechanism is provided on each workstation of the second workbench 4. The guide block positioning mechanism includes a guide block center positioning portion, a guide block clamping portion and a guide block support structure. The installation area in the middle of the second workbench 4 is provided with an ejection mechanism. When installing, the guide block is placed on the guide block support structure, and the first end and the bottom of the guide block are both against the guide block support structure. When the ejection mechanism is working, it is suitable for acting on the guide block clamping portion to make the guide block clamping portion abut against the other end of the guide block to complete the positioning of the guide block. The guide block is as shown in FIG. Figure 17 As shown, there is a hole in the middle of the outer side, which can cooperate with the center positioning part of the guide block to limit the position. The cooperation between the ejection mechanism and the guide block clamping part is as follows Figure 12 As shown at the workstation 1 on the second workbench 4, similar to the cooperation between the spring locking assembly 24 and its driving mechanism, a transmission rod is provided on the outside of the clamping portion of the guide block, and a transmission groove is provided on the ejection mechanism. When the second workbench 4 rotates, the two do not interact with each other. When the two correspond to each other, if the ejection mechanism is ejected or pulled back, the transmission rod will be acted to extend (clamp) and pull back (cancel clamping).

[0072] In order to detect whether the elasticity of the tensioner assembly meets the standards, the automated assembly system also includes an elastic force detection station 14, which is arranged on the first workbench 5 and behind the component assembly station 11. The elastic force detection station 14 includes a testing mechanism for elastically compressing the tensioner assembly. The testing mechanism includes a test head 141, a pressure sensor and a displacement sensor 142. The pressure sensor is used to record the force applied when the tensioner assembly is elastically compressed, and the displacement sensor 142 is used to record the corresponding displacement distance of the tensioner assembly when it is under pressure in the recording state of the matching pressure sensor; the spring locking assembly 24 is suitable for limiting the assembled tensioner assembly during the process to prevent the parts from being scattered due to the sudden reset of the spring in the tensioner assembly after the pressure test of the tensioner assembly is completed. During this process, the spring locking assembly continues to limit.

[0073] The electric cylinder rises until the pressure sensor feedback value is 0, the spring is in a relaxed state, and the displacement sensor 142 count is reset to zero; the electric cylinder is gently pressed down and then rises. This is the test process, and the pressure and displacement are fed back to generate a curve graph; the displacement sensor 142 can obtain the deformation parameters of the tensioner assembly in real time, and the pressure sensor can obtain the pressure parameters in real time. Combined with the drawn curve graph, it can be used to determine whether the assembled tensioner assembly is qualified.

[0074] To ensure the stability of the tensioner assembly during storage and transportation, a safety clamp is installed to secure it. Therefore, this automated assembly system includes a safety clamp assembly station 15, a defective product rejection station 16, and a finished product inkjet printout station 17. The safety clamp is used to limit elastic deformation of the tensioner assembly. The safety clamp can be loaded from a safety clamp loading tray 35 and installed by a robotic arm.

[0075] The workpieces that pass the inspection at the elastic force inspection station 14 are installed with safety lock clamps at the safety lock clamp assembly station 15 and then enter the finished product coding and discharging station 17 for coding and discharging. The workpieces that fail the inspection at the elastic force inspection station 14 are rejected by the defective product rejection station 16.

[0076] The present automated assembly system includes several feeding mechanisms, which provide accommodation space for one or more of the housing 22, large tooth rack 30, small tooth rack 29, guide block 25, spring 26, and safety lock clamp 27 and perform quantitative feeding. The feeding mechanism includes a material shortage sensing structure and a material fullness sensing structure. Figure 1 、 Figure 2 As shown, the loading mechanism includes a shell loading tray 36, a large tooth rack loading tray 31, a guide block loading tray 32, a small tooth rack loading tray 33, a spring loading tray 34 and two trays on the safety lock clamp, totaling six loading trays. The loading tray can be a vibration loading tray. Material shortage sensing and material fullness sensing are common functions of the vibration loading tray, so they are not additionally limited or elaborated. The assembly station is formed by a shielding cover as shown in FIG. Figure 1 In the assembly station shown, shielding covers are placed outside each loading tray to form a loading station. A silo can also be provided for timely refilling. An oiling control cabinet 2 can be installed, and the metering valves of the first and second oiling stations 8 and 28 can be connected to the external oiling control cabinet 2 to control oil delivery.

[0077] The shell assembly station 12, large tooth rack assembly station 13, guide block assembly station 7, small tooth rack assembly station 9, spring assembly station 10, and component assembly station 11 all operate on roughly the same principle: they all clamp parts to corresponding workstations using grippers for assembly. If a specific posture is required during assembly, conventional flipping and clamping devices can be added for securing and clamping. Therefore, this application does not provide a detailed description of all assembly processes and workstations; only some key workstations are described in detail.

[0078] like Figure 6The shell assembly station 12 shown includes a shell loading tray 36, a shell loading channel 361, and a shell clamp. The shell clamp grasps the shell in the loading channel and moves it to the shell fixing mechanism 21 of the first workbench 5. The shell is then rotated to the large tooth rack assembly station 13 through the first workbench 5. A color sensor can also be provided to set different colors for shells of different specifications. The color sensor can be used to identify the color to further identify the shell, thereby clamping and assembling shells of different specifications.

[0079] like Figure 7 The large tooth rack assembly station 13 shown includes a large tooth rack loading tray 31, a large tooth rack loading channel 312, a large tooth rack clamping claw 311 and a large tooth rack pressing mechanism. The large tooth rack loading tray 31 can be provided with a selection mechanism to allow the large tooth rack to enter the large tooth rack loading channel 312 in a specific posture, be clamped to the assembly position by the large tooth rack clamping claw, and finally, the shell and the large tooth rack are assembled using the large tooth rack pressing mechanism. The large tooth rack loading tray 31 can also be provided with a color sensor to identify different large tooth racks for clamping and assembly. The shell assembly is then rotated to the assembly position of the component assembly station 11 on the first workbench 5.

[0080] like Figure 8 The guide block assembly shown in the work station 7 includes a guide block loading tray 32 ( Figure 8 Hidden in the figure), guide block feeding channel, guide block clamping claw 72, CCD camera 71, guide block supporting structure 73 and guide block flipping structure 74. The guide block is initially in a vertical state, and a guide block supporting structure 73 is set at its bottom. The guide block state is detected by the CCD camera 71. After passing the inspection, the guide block supporting structure 73 (a cylinder or other components can be set) moves horizontally to the loading position and clamps the guide block through the guide block clamping claw 72. Then, it is flipped 90° by the guide block flipping structure 74 and then transferred to the guide block positioning mechanism of the second workbench 4 for fixation. The second workbench 4 rotates to move the guide block to Figure 9 、 Figure 10 The first oiling station 8 shown is used to oil the inner groove of the guide block. The second workbench 4 then continues to rotate, moving the guide block to the small tooth rack assembly station 9. A CCD camera 71, an imaging device based on a charge-coupled device (CCD), is used to detect blockage in the guide block hole and adjust the guide block's angular position. A reject bin and a rejection device can also be provided. The CCD camera 71 detects and rejects unqualified guide blocks. The guide block loading tray 32 can also be equipped with a color sensor to accommodate guide blocks of varying specifications. Figure 8 The guide shoe jaw 72 is shown with a schematic representation on the left.

[0081] like Figure 11The small tooth rack assembly station 9 shown includes a small tooth rack loading tray 33 (hidden), a small tooth rack loading channel, a small tooth rack clamp, and a small tooth rack pressing mechanism. The small tooth rack clamp grasps the small tooth rack and places it in the assembly position, where it is assembled by the small tooth rack pressing mechanism. The small tooth rack loading tray 33 can also be equipped with a color sensor to accommodate small tooth racks of different sizes. After assembly, the second workbench 4 rotates to move the guide block to the spring assembly station 10.

[0082] like Figure 12 、 Figure 13 The spring assembly station 10 includes a spring loading tray 34 (hidden and not shown), a spring loading channel, a translation walking structure 101, a guide rail 102, a spring clamping claw 103, a guide block clamping structure 104 and a spring pressing mechanism. A guide block clamping structure 104 is also provided. When the spring is assembled, a spring clamping claw 103 is provided to clamp the spring from the side. The translation walking structure 101 and the guide rail 102 cooperate to make the spring clamping claw 103 translate with the spring. The guide block clamping structure 104 removes the guide block from the guide block positioning mechanism on the second workbench 4. The guide block clamping structure 104 clamps the end of the guide block where the spring is not installed and clamps it while maintaining a horizontal state. Then the spring clamping claw 103 moves the spring to the guide block and puts it on. Then the spring pressing mechanism presses the spring in and fixes it. A conical clamping edge or other structure can be provided on one side of the clamping end of the guide block to form an interference fit or a limit fit after the spring is pressed in, thereby fixing the spring at the fixed position of the guide block. Figure 13 The feeding direction outside the spring feeding channel shown corresponds to the installation position of the spring feeding tray 34. Figure 12 The spring clamp 103 shown has two, but in reality there is only one, one of which is used to represent the two states of the clamp, namely the initial state and the working state.

[0083] The guide block assembly is then moved to the oiling station through the transverse portion 182 and the transverse mechanism 19 of the second oiling station 28 for oiling, and is then clamped by the guide block assembly loading mechanism 113 and entered into the assembly assembly station 11 and the shell assembly for assembly.

[0084] After assembly is complete, the product is transferred from the first workbench 5 to the spring force testing station 14 for spring force testing. Products that pass the test are transferred to the safety lock clip assembly station 15 for assembly of the safety lock clip. Finally, the products are transferred to the finished product coding and discharging station 17, where they are coded by the coding equipment 6 and removed by the discharging gripper. Products that fail the test are transferred to the defective product rejection station 16 for rejection by the product handling mechanism. The product handling mechanism is commonly used for gripping and transferring products and is not specifically limited thereto.

[0085] The clamping jaws involved in this application can be selected and adapted according to needs, and any existing clamping jaw device or component that can achieve a specific clamping function can be selected.

[0086] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. An automated assembly system for a tensioner assembly, used for assembling a housing, a large tooth frame, a guide block, a small tooth frame and a spring, characterized in that: The system comprises a housing assembly station, a large tooth rack assembly station, a guide block assembly station, a small tooth rack assembly station, a spring assembly station and a component assembly station. The large tooth rack assembly station is suitable for assembling the large tooth rack into the inner groove of the housing to form a housing assembly. The small tooth rack assembly station and the spring assembly station are suitable for assembling the small tooth rack into the inner groove of the guide block and assembling the spring into the outer wall of the guide block to form a guide block assembly. The component assembly station is suitable for assembling the housing assembly and the guide block assembly to form a tensioner assembly. The automated assembly system also includes a first oiling station arranged between the guide block assembly station and the small tooth rack assembly station, and a second oiling station arranged between the spring assembly station and the component assembly station. The first oiling station is suitable for oiling the inner groove of the guide block before assembling the small tooth rack. The second oiling station includes an oiling groove with an inner diameter greater than or equal to the outer wall of the guide block and smaller than the outer diameter of the spring. The second oiling station is suitable for oiling the outer wall of the guide block of the guide block assembly after the spring is assembled and before the component assembly station. During the process, the oiling groove first moves toward one side of the guide block and compresses the spring to avoid the outer wall of the guide block to be oiled.

2. The tensioner assembly automated assembly system according to claim 1, wherein: The first oiling station and the second oiling station are both provided with a metering valve, the first oiling station comprises a first transfer unit and a first oiling block, and the second oiling station comprises a second transfer unit and a second oiling block; The first oiling block is controlled by the first transfer unit to enter and leave the inner groove of the guide block from the top of the guide block, and is oiled through the metering valve during the leaving process; The oiling groove is formed inside the second oiling block, and the second transferring part controls the second oiling block to start from the bottom of the guide block, wrap the outer wall of the guide block, and move upward first and then downward. During the upward movement process, it abuts and compresses the spring, and during the downward movement process, quantitative oiling is performed through the quantitative valve.

3. The automatic assembly system for tensioner assembly according to claim 2, characterized in that: The second oiling station also includes a flip loading mechanism and a transverse movement mechanism, and the component assembly station includes a guide block component loading mechanism. After the guide block assembly is assembled in the workstation by the spring assembly, it is in a horizontal state. The flip loading mechanism is suitable for clamping and picking up the guide block assembly in the horizontal state from both ends toward the inside, flipping it 90°, and then moving it horizontally to the transverse mechanism. The transverse mechanism clamps and picks up the guide block assembly from the side of the guide block assembly, and simultaneously clamps the guide block and the spring in the process, and then moves it horizontally and transfers it to the top of the second oiling block. The second transfer part is suitable for driving the second oiling block to rise, compressing the spring to the oiling height in the process, and then the second transfer part drives the second oiling block to descend and oils it in the process, and the spring recovers with the descending process; after oiling, the guide block assembly loading mechanism fixes the guide block assembly by the top of the guide block and moves it to the component assembly workstation for assembly.

4. The tensioner assembly automated assembly system according to claim 2, wherein: The bottom of the outer wall of the first oiling block is provided with a first oil outlet hole, and the first oiling block discharges oil through the first oil outlet hole during the process of entering the bottom of the inner groove of the guide block and rising; The second oiling block is provided with a second oil outlet at the top of its inner cavity; the inner cavity of the second oiling block is provided with an avoidance space below the bottom of the second oil outlet, and the avoidance space does not contact the bottom part of the guide block; during assembly, the bottom of the guide block assembly is inserted into the top of the shell assembly.

5. The tensioner assembly automated assembly system according to claim 1, wherein: It includes a first workbench and a second workbench, the shell assembly station, the large tooth rack assembly station and the component assembly station are all arranged on the first workbench; the guide block assembly station, the first oiling station, the small tooth rack assembly station and the spring assembly station are all arranged on the second workbench; the second oiling station is arranged in the middle part between the first workbench and the second workbench.

6. The tensioner assembly automated assembly system according to claim 5, wherein: The first workbench and the second workbench are both divider turntables, and a mounting area is provided in the middle of the divider turntable. The mounting area does not rotate with the divider turntable, and the workpiece is transferred by the rotation of the divider turntable. The first workbench is provided with a shell fixing mechanism at each workstation thereof, and a positioning hole for vertical insertion of the shell is provided at the middle of the top of the shell fixing mechanism; A guide block positioning mechanism is provided on each workstation of the second workbench, and the guide block positioning mechanism includes a guide block center positioning part, a guide block clamping part and a guide block support structure. The installation area in the middle of the second workbench is provided with an ejection mechanism. During installation, the guide block is placed on the guide block support structure, and the first end and the bottom of the guide block are both against the guide block support structure. When the ejection mechanism is working, it is suitable for acting on the guide block clamping part so that the guide block clamping part abuts against the other end of the guide block to complete the positioning of the guide block.

7. The tensioner assembly automated assembly system according to claim 6, wherein: The housing fixing mechanism includes a spring locking assembly, which forms a restricted state and a release state by lateral movement. The installation area in the center of the first workbench is provided with a plurality of driving mechanisms, and the spring locking assembly rotates synchronously with the first workbench. The driving mechanism cooperates with the spring locking assembly at a set position to drive the spring locking assembly to move to switch the working state; the guide block assembly is provided with one end of the spring inserted into the housing, and the spring locking assembly acts on the top end of the guide block; The spring locking assembly includes a positioning portion that can be laterally moved toward the direction of the shell fixing mechanism and a transmission portion arranged on the outside of the positioning portion. The driving mechanism is provided with a transmission groove, and a limiting structure is provided at the end of the transmission portion. When the shell rotates to the set position, the limiting structure rotates into the range of the transmission groove. When the driving mechanism is extended, it acts on the limiting structure and the transmission portion to move the positioning portion toward the shell and clamp it. Before leaving the position, the driving mechanism is reset, and the action on the limiting structure and the transmission portion is correspondingly released.

8. The tensioner assembly automated assembly system according to claim 7, wherein: The assembly also includes an elastic force detection station, which is arranged on the first workbench and located behind the component assembly station. The elastic force detection station includes a testing mechanism for elastically compressing the tensioner assembly. The testing mechanism includes a testing head, a pressure sensor and a displacement sensor. The pressure sensor is used to record the force applied when the tensioner assembly is elastically compressed, and the displacement sensor is used to record the corresponding displacement distance of the tensioner assembly when it is under pressure in the recording state of the pressure sensor. The spring locking assembly is suitable for restricting the assembled tensioner assembly during the process to prevent parts from being scattered due to sudden resetting of the spring in the tensioner assembly after the pressure test of the tensioner assembly is completed.

9. The tensioner assembly automated assembly system according to claim 8, wherein: It also includes a safety lock clamp assembly station, a defective product rejection station and a finished product inkjet printing and discharging station; the safety lock clamp is used to limit the elastic deformation of the tensioner assembly; The workpieces that pass the inspection at the elastic force inspection station are installed with safety lock clamps at the safety lock clamp assembly station, and then enter the finished product coding and discharging station for coding and discharging. The workpieces that fail the inspection at the elastic force inspection station are rejected by the defective product rejection station.

10. The tensioner assembly automated assembly system according to claim 9, wherein: It includes several feeding mechanisms, which provide accommodation space for one or more of the shell, the large tooth rack, the small tooth rack, the guide block, the spring, and the safety lock clamp and perform quantitative feeding. The feeding mechanism includes a lack of material sensing structure and a full material sensing structure.

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