Automatic riveting device for clamp trunnion

Abstract

The invention discloses an automatic riveting device for a clamp trunnion. The automatic riveting device comprises a machine table, a trunnion main body pressing unit, a trunnion cap pressing unit, a trunnion main body feeding unit and a trunnion cap feeding unit, a supporting rod is fixed to the machine table and corresponds to the trunnion main body feeding unit, and the trunnion main body feeding unit conveys trunnion main bodies to a pressing station on the supporting rod. The trunnion cap press-fit unit is arranged on the machine table and located below the press-fit station, the trunnion cap feeding unit conveys trunnion caps to the trunnion cap press-fit unit one by one, and the trunnion cap press-fit unit comprises a vertically-arranged trunnion cap ejector rod and a trunnion cap ejector rod driving mechanism for driving the trunnion cap ejector rod to move up and down; according to the automatic riveting device for the clamp trunnion, automatic feeding, pressing and sleeving of the trunnion main body and the trunnion cap are achieved through full-automatic cooperative operation, the labor intensity is effectively reduced, the production efficiency and the product yield are improved, and the automatic riveting device for the clamp trunnion has good practicability and generalizability.

Description

Technical Field

[0001] This invention relates to the field of clamp production equipment technology, specifically to an automatic riveting device for clamp trunnions. Background Technology

[0002] Clamps, as commonly used fasteners, are widely used in automobiles, pipelines, and machinery. Their function is to securely connect two components through clamping force, ensuring the connection's sealing and stability. Trunnions are a core load-bearing component of existing clamps, used in conjunction with bolts and other fasteners to lock and loosen the clamp. The quality of the riveting between the trunnion body and the trunnion cap directly determines the clamp's structural strength and service life. If the riveting is not secure, the clamp may loosen or fall off during use, severely affecting the normal operation of the equipment.

[0003] Currently, the riveting process between the trunnion body and the trunnion cap is mostly done manually. This manual riveting method requires operators to manually place the trunnion body in the designated position, then manually place the trunnion cap, and finally complete the riveting using a pressing tool. This method is not only labor-intensive and inefficient, but the operator's skill level and sense of responsibility directly affect the riveting accuracy, making it difficult to meet the demands of large-volume, high-precision production. Summary of the Invention

[0004] In view of the shortcomings pointed out in the background art, the present invention provides an automatic riveting device for clamp trunnions that improves production efficiency by increasing the degree of automation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides an automatic riveting device for trunnions, including a machine base, a trunnion body pressing unit, a trunnion cap pressing unit, a trunnion body feeding unit, and a trunnion cap feeding unit. A support rod is fixed to the machine base via a connecting bracket. The support rod is connected to the trunnion body feeding unit and extends forward along the front-back direction to the trunnion body pressing unit. The trunnion body feeding unit feeds trunnion bodies one by one to the pressing station on the support rod. The trunnion cap pressing unit is located on the machine base and below the pressing station. The trunnion cap feeding unit feeds trunnion caps one by one to the trunnion cap pressing unit. The trunnion cap pressing unit includes a vertically arranged trunnion cap top rod and a trunnion cap top rod driving mechanism for driving the trunnion cap top rod to move up and down. The trunnion body pressing unit presses the trunnion body at the pressing station on the support rod, and the trunnion cap top rod lifts the trunnion cap upwards to fit it onto the lower end of the trunnion body.

[0007] Furthermore, the trunnion body feeding unit includes a trunnion body vibratory plate, a trunnion body conveying mechanism, a trunnion body blocking mechanism, and a trunnion body pushing mechanism. The feeding end of the trunnion body conveying mechanism is connected to the trunnion body vibratory plate, and the discharging end of the trunnion body conveying mechanism extends close to the support rod. The trunnion body blocking mechanism is provided corresponding to the trunnion body conveying mechanism and is used to block and release the trunnion bodies conveyed by the trunnion body conveying mechanism one by one. The trunnion body pushing mechanism is used to push the individual trunnion bodies that have fallen on the support rod forward to the pressing station.

[0008] Furthermore, the trunnion body conveying mechanism includes an upper feeding track and a lower feeding track that are sequentially connected along the trunnion body conveying direction. The upper feeding track and the lower feeding track are inclined. The upper feeding track is mounted on the first direct vibration mechanism. The trunnion body blocking mechanism is set corresponding to the lower feeding track. The lower end of the lower feeding track is close to the support rod and there is a clearance between the two.

[0009] Furthermore, the trunnion body pushing mechanism includes a trunnion body push block that can move back and forth and a trunnion body driving mechanism that drives the trunnion body push block to move back and forth. The longitudinal cross-sectional shape of the trunnion body push block is an open annular shape and is arranged to surround the support rod.

[0010] Further, the trunnion body retaining mechanism includes a drive cylinder, a slider, a retaining rod, and a pressing rod; the slider is positioned above the lower feeding track and is driven to move by the drive cylinder, with its moving direction being the same as the extension direction of the lower feeding track; the slider has a first drive hole and a second drive hole; the retaining rod and the pressing rod are mounted on the mounting base one after the other along the extension direction of the lower feeding track, and the pressing rod and the retaining rod can be moved perpendicular to the extension direction of the lower feeding track; the end of the retaining rod away from the lower feeding track has a first transmission wheel that cooperates with the first drive hole, and the end of the pressing rod away from the lower feeding track has a second transmission wheel that cooperates with the second drive hole; the slider moves between a first position and a second position under the drive of the drive cylinder, and the slider moves from the second position to the first position along the first direction; when the slider is in the second position, the retaining rod is positioned close to the first position. When the slider is in the first position, the stop rod is in a position away from the lower feed track and does not block the trunnion body; the stop rod is close to the trunnion body and presses down on it. Specifically, when the slider moves in the first direction, the first drive hole drives the stop rod to move away from the lower feed track to release the foremost trunnion body. Before the stop rod releases the foremost trunnion body, the second drive hole drives the stop rod to move towards the lower feed track to press down on the next trunnion body immediately following the foremost trunnion body. When the slider moves in the second direction opposite to the first direction, the stop rod moves towards the lower feed track to block the trunnion body. Before the stop rod releases the trunnion body it presses down, the stop rod has moved to the blocking position.

[0011] Furthermore, the first driving hole and the second driving hole are arranged in a figure-eight shape; the first driving hole is a strip-shaped hole arranged at an angle to the movable direction of the slider; the second driving hole includes a first hole segment and a second hole segment that are connected, the first hole segment is a strip-shaped hole arranged at an angle to the movable direction of the slider, and the second hole segment is a strip-shaped hole arranged along the movable direction of the slider; when the slider is in the second position, the second transmission wheel is located in the first hole segment; when the slider is in the first position, the second transmission wheel is located in the second hole segment.

[0012] Furthermore, the lower feeding track is rod-shaped, and the end of the pressing rod near the lower feeding track is provided with a pressing block, and the pressing block is provided with a rubber pad; the end of the blocking rod near the lower feeding track is provided with a blocking block, and the blocking block is provided with an opening groove facing the direction of the lower feeding track for avoiding the lower feeding track.

[0013] Furthermore, the trunnion cap feeding unit includes a first trunnion cap feeding track arranged in the front-to-back direction, a trunnion cap pusher block movably arranged on the first trunnion cap feeding track, a trunnion cap pusher block driving cylinder for driving the trunnion cap pusher block to move back and forth, a second trunnion cap feeding track perpendicular to the first trunnion cap feeding track, and a trunnion cap vibrating plate connected to the second trunnion cap feeding track; the end of the second trunnion cap feeding track is connected to the middle of the first trunnion cap feeding track, and a trunnion cap positioning groove is provided on the first trunnion cap feeding track below the pressing station. The trunnion cap positioning groove is suitable for accommodating a trunnion cap, the trunnion cap top rod corresponds to the position of the trunnion cap positioning groove, and a positioning shaft suitable for engaging with the trunnion cap is provided at the top of the trunnion cap top rod.

[0014] Furthermore, the trunnion body pressing unit includes a left pressing block and a right pressing block that are opposite to each other, a left limiting slider module and a right limiting slider module for restricting the left pressing block and the right pressing block to move in the left and right direction, and a pressing block driving module for driving the left pressing block and the right pressing block to move closer and further away synchronously; the pressing block driving module includes a driving block that can move up and down and an up and down driving unit for driving the driving block to move up and down, and the left and right ends of the driving block are provided with a left oblique part and a right oblique part that respectively wedge with the left pressing block and the right pressing block, and the left oblique part and the right oblique part are arranged in a figure-eight shape that opens outward from top to bottom.

[0015] The positive effects of this invention are as follows: The automatic trunnion riveting device of this invention has an optimized structure and significantly improved automation. Through the coordinated operation of the trunnion body pressing unit, the trunnion cap pressing unit, the trunnion body feeding unit, and the trunnion cap feeding unit, the entire process of automatic feeding of the trunnion body, closing, automatic feeding of the trunnion cap, and assembly is fully automated. There is no need for manual assistance in feeding, positioning, and pressing, which reduces the labor intensity of operators, eliminates the efficiency bottleneck caused by manual operation, adapts to the needs of large-scale production, reduces human error, lowers the product defect rate, and further controls production costs. It has good practicality and promotional value. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art are briefly introduced below. Similar elements or parts in the drawings are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the automatic riveting device for clamp trunnions in this invention.

[0018] Figure 2 for Figure 1The diagram shows a top view of the automatic riveting device for clamp trunnions.

[0019] Figure 3 For along Figure 2 A sectional view cut along line AA.

[0020] Figure 4 For along Figure 3 A magnified view of a section at point B.

[0021] Figure 5 for Figure 1 The side view of the automatic riveting device for clamp trunnions shown.

[0022] Figure 6 For along Figure 5 A sectional view cut along the CC line.

[0023] Figure 7 This is a schematic diagram of the trunnion body feeding unit in this invention.

[0024] Figure 8 This is a partial structural schematic diagram of the trunnion body feeding unit in this invention.

[0025] Figures 9 to 11 This is a schematic diagram of the slider in the trunnion body retaining mechanism of the present invention at different positions.

[0026] Figure 12 This is a partial view of the stop bar in this invention.

[0027] Figure 13 This is a schematic diagram of the trunnion assembly state.

[0028] Figure 14 This is an exploded view of the trunnion.

[0029] The reference numerals in the figure are as follows: 1. Machine base; 11. Connecting bracket; 12. Support rod; 2. Trunnion body pressing unit; 21. Left pressing block; 22. Right pressing block; 23. Left limit slider module; 24. Right limit slider module; 25. Pressing block drive module; 251. Drive block; 2511. Left inclined part; 2512. Right inclined part; 252. Upper and lower drive unit; 253. Inclined slide rail pair; 3. Trunnion cap pressing unit; 31. Trunnion cap top rod; 311. Positioning shaft; 32. Trunnion cap top rod drive mechanism; 4. Trunnion body feeding unit; 41. Trunnion body vibratory feeder; 42. Trunnion body conveying mechanism; 421. Upper feeding track; 422. Lower feeding track; 423. First direct vibration mechanism; 43. Trunnion body blocking mechanism; 431. Drive cylinder; 432, slider; 4321, first drive hole; 4322, second drive hole; 43221, first hole section; 43222, second hole section; 433, stop bar; 4331, first transmission wheel; 4332, stop block; 4333, opening slot; 434, pressure bar; 4341, second transmission wheel; 4342, pressure block; 4343, rubber pad; 435, mounting base; 44, trunnion body pushing mechanism; 441, trunnion body push block; 442, trunnion body drive mechanism; 5, trunnion cap feeding unit; 51, first trunnion cap feeding track; 511, trunnion cap positioning slot; 52, trunnion cap push block; 53, trunnion cap push block drive cylinder; 54, second trunnion cap feeding track; 55, trunnion cap vibratory feeder; 6, trunnion body; 7, trunnion cap. Detailed Implementation

[0030] The embodiments of the technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore merely examples and should not be used to limit the scope of protection of the present invention.

[0031] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0032] The structure of the automatic riveting device for clamp trunnions in this embodiment of the invention is as follows: Figures 1 to 12 As shown, it includes a machine base 1, a trunnion body pressing unit 2, a trunnion cap pressing unit 3, a trunnion body feeding unit 4, and a trunnion cap feeding unit 5.

[0033] A support rod 12 is fixed on the machine base 1 by a connecting bracket 11. The connecting bracket 11 is used to suspend and support the support rod 12 above the machine base 1. The support rod 12 is connected to the trunnion body feeding unit 4. The support rod 12 is arranged in the front-back direction and extends forward to the trunnion body pressing unit 2. The support rod 12 adopts a rigid rod structure and is preferably made of high-strength stainless steel, which has sufficient structural strength and wear resistance. The diameter of the support rod 12 is smaller than the inner diameter of the trunnion body 6, which is used to support the trunnion body 6 and allow the trunnion body 6 to slide along the support rod 12. The trunnion body feeding unit 4 can convey the trunnion bodies 6 one by one to the pressing station on the support rod 12; the trunnion cap pressing unit 3 is located on the machine base 1 and below the pressing station, and the trunnion cap feeding unit 5 conveys the trunnion caps 7 one by one to the trunnion cap pressing unit 3. The trunnion cap pressing unit 3 includes a vertically arranged trunnion cap top rod 31 and a trunnion cap top rod driving mechanism 32 that drives the trunnion cap top rod 31 to move up and down; during operation, the trunnion body pressing unit 2 presses the trunnion bodies 6 on the support rod 12 at the pressing station, thereby closing the trunnion bodies 6 together. Then, by controlling the trunnion cap top rod 31, the trunnion cap 7 is pushed upward to fit onto the lower outer periphery of the closed trunnion body 6 (the trunnion cap 7 and the lower end of the trunnion body 6 are interference fit), thereby forming a complete trunnion. The shape of the trunnion body 6 and the trunnion cap 7 before riveting is as follows. Figure 14 As shown, the trunnion after riveting and assembly has the following shape. Figure 13 As shown.

[0034] Further, see Figures 5 to 8 As shown, the trunnion body feeding unit 4 includes a trunnion body vibratory plate 41, a trunnion body conveying mechanism 42, a trunnion body blocking mechanism 43, and a trunnion body pushing mechanism 44. The feeding end of the trunnion body conveying mechanism 42 is connected to the trunnion body vibratory plate 41 to arrange and output the disordered trunnion bodies 6 in an orderly manner. The discharge end of the trunnion body conveying mechanism 42 extends close to the support rod 12 so that the trunnion bodies 6 output by the trunnion body conveying mechanism 42 can fall onto the support rod 12. The trunnion body blocking mechanism 43 is set corresponding to the trunnion body conveying mechanism 42 and is used to block and release the trunnion bodies 6 conveyed by the trunnion body conveying mechanism 42 one by one, ensuring that only one trunnion body 6 falls onto the support rod 12 at a time. The trunnion body pushing mechanism 44 is used to push the single trunnion body 6 that has fallen onto the support rod 12 forward to the pressing station. This trunnion body feeding unit is designed to realize the automatic sorting, quantitative release, and precise feeding of the trunnion bodies 6.

[0035] As a further improvement to the above embodiments, such as Figure 7As shown, the trunnion body conveying mechanism 42 includes an upper feeding track 421 and a lower feeding track 422 sequentially connected along the conveying direction of the trunnion body 6. Both the upper feeding track 421 and the lower feeding track 422 are inclined so that the trunnion body 6 has a tendency to slide downward under the action of gravity. The upper feeding track 421 is mounted on a first vibration mechanism 423. The first vibration mechanism 423 provides high-frequency micro-amplitude vibration during operation, so that the trunnion body 6 on the upper feeding track 421 keeps creeping forward and moves smoothly to the lower feeding track 422. At the same time, the upper feeding track 421 and the lower feeding track 422 adopt a split structure design, with an interval at the docking point. This interval can effectively block the transmission of vibration, so that when the upper feeding track 421 vibrates under the drive of the first vibration mechanism 423, it will not cause the lower feeding track 422 to vibrate synchronously. This ensures that the trunnion body 6 at the end of the lower feeding track 422 is in a relatively stationary state when entering the blocking and dropping stage, thus improving the accuracy and reliability of the blocking mechanism. The trunnion body blocking mechanism 43 is set corresponding to the lower feeding track 422 and is used to block and release the trunnion bodies 6 sliding down the lower feeding track 422 one by one. The lower end of the lower feeding track 422 is close to the support rod 12 so that the trunnion bodies sliding down the lower feeding track 422 can fall smoothly onto the support rod 12. A clearance is left between the lower feeding track 422 and the support rod 12. When the trunnion body pusher 441 pushes the trunnion body 6 forward along the support rod 12, the clearance can ensure that the trunnion body pusher 441 and the trunnion body 6 have no contact interference with the lower end of the lower feeding track 422, thus ensuring smooth pushing action and improving the stability of the feeding and pushing process.

[0036] See Figure 7 and Figure 8 As shown, the trunnion body pushing mechanism 44 includes a trunnion body pushing block 441 that can move back and forth and a trunnion body driving mechanism 442 that drives the trunnion body pushing block 441 to move back and forth. The longitudinal cross-sectional shape of the trunnion body pushing block 441 is an open annular shape (such as C-shaped, n-shaped, etc.) and is arranged to surround the support rod 12. Preferably, a gap is left between the trunnion body pushing block 441 and the support rod 12 to avoid friction between the two. The opening of the trunnion body pushing block 441 can avoid the connecting frame 11 when pushing the trunnion body 6. When the trunnion body pushing block 441 moves forward, its front end abuts against the trunnion body 6 and pushes it forward.

[0037] As a further improvement to the above embodiments, see Figure 5 , Figures 9 to 11The trunnion body blocking mechanism 43 is used to feed the trunnion bodies 6 one by one sequentially, preventing multiple trunnion bodies 6 from falling into the support rod 12 at the same time and affecting subsequent pushing and pressing. Specifically, the trunnion body blocking mechanism 43 includes a drive cylinder 431, a slider 432, a blocking rod 433, and a pressing rod 434; the slider 432 is located above the lower feeding track 422 and is driven to move by the drive cylinder 431, and its moving direction is in the same direction as the extension direction of the lower feeding track 422; the slider 432 has a first drive hole 4321 and a second drive hole 4322, and the blocking rod 433 and the pressing rod 434 extend along the lower feeding track 422. The pressure rod 434 and the stop rod 433 are mounted one after the other on the mounting base 435, and are movable along a direction perpendicular to the extension of the lower feeding track 422. Specifically, the mounting base 435 is provided with a first limiting hole and a second limiting hole for the pressure rod 434 and the stop rod 433 to pass through, so as to realize the installation limiting and movement guidance of the stop rod 433 and the pressure rod 434; the end of the stop rod 433 away from the lower feeding track 422 is provided with a hole that cooperates with the first driving hole 4321. The first drive wheel 4331, the end of the pressure rod 434 away from the lower feeding track 422 is provided with a second drive wheel 4341 that cooperates with the second drive hole 4322. Through the cooperation of the first drive hole 4321 with the first drive wheel 4331 and the second drive hole 4322 with the second drive wheel 4341, the pressure rod 434 and the stop rod 433 are linked with the slider 432, ensuring flexible and smooth operation. The first drive wheel 4331 and the second drive wheel 4341 can be rollers or bearings. The slider 432 moves between a first position and a second position under the drive of the drive cylinder 431: the slider 432 moves from the second position to the first position along the first direction; when the slider 432 is in the second position, the stop rod 433 is in a position close to the lower feeding track 422 and blocking the trunnion body 6, and the pressure rod 434 is in a position separated from the trunnion body 6. At this time, the stop rod 433 blocks the trunnion body 6 on the lower feeding track 422 (e.g., Figure 9 (As shown); when the slider 432 is in the first position, the stop rod 433 is in a position away from the lower feed track 422 and does not obstruct the trunnion body 6, and the pressure rod 434 is close to the trunnion body 6 and presses down on the trunnion body 6 (as shown). Figure 11(As shown). During operation, when the slider 432 moves along the first direction, the first drive hole 4321 drives the stop rod 433 to move away from the lower feed track 422 to release the foremost trunnion body 6. Before the stop rod 433 releases the trunnion body 6, the second drive hole 4322 has already driven the pressure rod 434 to move towards the lower feed track 422 to press down the trunnion body 6 that is immediately following the foremost trunnion body. When the slider 432 moves along the second direction opposite to the first direction, the stop rod 433 moves towards the lower feed track 422 to block the trunnion body 6, and then the pressure rod 434 moves towards... The trunnion body 6 is moved away from the lower feeding track 422 to release the trunnion body 6 that is pressed down by it, thereby causing the trunnion body on the lower feeding track 422 to move down by the width of one trunnion body. Through the above structure, the trunnion body blocking mechanism 43 can realize the alternating action of the blocking rod 433 and the pressing rod 434 by using a single drive cylinder 431 and slider 432. This ensures the smooth release of the foremost trunnion body 6 and can reliably press down the trunnion body 6, effectively preventing multiple trunnion bodies from falling at the same time. This realizes the sequential feeding of trunnion bodies 6, improves the stability of feeding and the continuity of riveting operations, and has a simple structure and reliable operation.

[0038] Further, the first driving hole 4321 and the second driving hole 4322 are arranged in a figure-eight shape; specifically, the first driving hole 4321 is a strip-shaped hole arranged at an angle to the movable direction of the slider 432; the second driving hole 4322 includes a first hole segment 43221 and a second hole segment 43222 that are connected, the first hole segment 43221 is a strip-shaped hole arranged at an angle to the movable direction of the slider 432, and the second hole segment 43222 is a strip-shaped hole arranged along the movable direction of the slider 432. When the slider 432 is in the second position, the second transmission wheel 4341 is located in the first hole segment 43221 (see...). Figure 9 When the slider 432 is in the first position, the second transmission wheel 4341 is located within the second hole section 43222 (see...). Figure 11 Using the aforementioned figure-eight arrangement and segmented design of the second drive hole 4322, in the early stage of the slider 432 moving along the first direction: the first drive hole 4321 and the first hole segment 43221 work together to make the pressure rod 434 and the stop rod 433 move synchronously in opposite directions, thereby enabling the pressure rod 434 to complete the action of pressing the corresponding part of the trunnion body, and the stop rod 433 to gradually move in the direction of releasing the trunnion body; in the middle stage of the slider 432 moving along the first direction (see... Figure 10The second drive wheel 4341 is located at the intersection of the first hole section 43221 and the second hole section 43222. At this time, the pressure rod 434 has pressed down on the trunnion body, while the stop rod 433 has not yet released the trunnion body. Later, as the slider 432 moves along the first direction: the second drive wheel 4341 enters the second hole section 43222. At this time, the pressure rod 434 remains pressed down and does not move, while the stop rod 433 continues to move to completely release the trunnion body, allowing the foremost trunnion body to move smoothly downwards. Subsequent trunnion bodies are then pressed down by the pressure rod 434 and do not move. When the slider moves in the opposite direction (i.e., along the second direction), the stop rod 433 can first move to a position that can block the trunnion body, and then the pressure rod 434 moves to remove the pressure on the trunnion body, allowing the trunnion body to move and resist the stop rod 433. This structure makes the timing of the stop and pressure more precise and stable, improving the reliability of feeding a single trunnion body.

[0039] Furthermore, the lower feeding track 422 is rod-shaped, and the pressure rod 434 has a pressure block 4342 at one end near the lower feeding track 422. The pressure block 4342 is provided with a rubber pad 4343 (such as a rubber pad). The stop rod 433 has a stop block 4332 at one end near the lower feeding track 422. The stop block 4332 is provided with an opening slot 4333 facing the lower feeding track 422 to avoid the lower feeding track 422. By setting the pressure block 4342 and the rubber pad 4343, the pressure rod 434 can increase the contact area when pressing the trunnion body 6 and use the elastic buffer of the rubber pad 4343 to ensure reliable clamping force. The opening slot 4333 on the stop block 4332 can avoid the lower feeding track 422 when the stop block 4332 moves in the direction of the lower feeding track 422, so as to increase the movement stroke of the stop block 4332 in the stage of blocking the trunnion body, and make the stop block 4332 reliably block the trunnion body. The structure is compact and can cooperate well with the rod-shaped lower feeding track 422, further improving the smoothness and reliability of the material blocking and pressing action, and ensuring that the trunnion bodies 6 can be supplied to the pressing station on the support rod 12 one by one in sequence.

[0040] See Figure 7As shown, in order to ensure a smooth transition of the trunnion body 6 between the upper feeding track 421 and the lower feeding track 422, it is preferable that the lower end of the upper feeding track 421 and the upper end of the lower feeding track 422 are both straight along the front-back direction, and that they form a straight continuum at the joint. Specifically, the lower end of the upper feeding track 421 is set as a horizontal or nearly horizontal straight section, and the upper end of the lower feeding track 422 is correspondingly set as a straight section at the same angle. The straight section setting can effectively reduce the sliding speed of the trunnion body 6 during the transition, allowing it to enter the lower feeding track 422 in a slower and more controllable manner. This avoids the trunnion body 6 from impacting and rebounding or inertial forward thrust at the stop mechanism due to excessive speed, thereby improving the accuracy of the stop mechanism 43 in releasing the trunnion bodies 6 one by one.

[0041] As a further improvement to the above embodiments, see Figure 2 and Figure 6 The trunnion cap feeding unit 5 is used to automatically sort, feed, and precisely position the trunnion caps 7 one by one below the pressing station, so as to cooperate with the trunnion cap top rod 31 to complete the assembly pressing action. Specifically, the trunnion cap feeding unit 5 includes a first trunnion cap feeding track 51 arranged in the front-back direction, a trunnion cap pusher 52 movably arranged on the first trunnion cap feeding track 51, a trunnion cap pusher drive cylinder 53 that drives the trunnion cap pusher 52 to move back and forth, a second trunnion cap feeding track 54 perpendicular to the first trunnion cap feeding track 51, and a trunnion cap vibrating plate 55 connected to the second trunnion cap feeding track 54; the second trunnion cap feeding track 54 can be mounted on a second vertical vibration mechanism; both the first trunnion cap feeding track 51 and the second trunnion cap feeding track 54 preferably adopt a U-shaped groove structure, and the groove width is adapted to the outer diameter of the trunnion cap 7 to ensure that the trunnion cap 7 moves smoothly in the track without tipping over or getting stuck. The first trunnion cap feeding track 51 is horizontal along the front-back direction of the machine base 1. Figure 6 The second trunnion cap feeding track 54 is positioned horizontally along the left-right direction of the machine base 1 (as indicated by the middle arrow L1), with its front end extending directly below the pressing station and its rear end serving as the initial position of the trunnion cap pusher 52. Figure 6The second trunnion feeding track 54 (as indicated by the middle arrow L2) is positioned perpendicularly to the first trunnion feeding track 51. The end of the second trunnion feeding track 54 (i.e., the end closest to the first trunnion feeding track 51) connects to the middle of the first trunnion feeding track 51, forming a "T"-shaped cross-feeding structure. The inlet end of the second trunnion feeding track 54 is connected to the outlet of the trunnion vibratory plate 55. The trunnion vibratory plate 55 uses vibration to arrange the disordered trunnion caps 7 in an orderly manner and feed them into the second trunnion feeding track 54. The trunnion pusher block 52 is slidably disposed within the first trunnion feeding track 51, and its rear end is connected to the output end of the trunnion pusher block drive cylinder 53. The trunnion pusher block drive cylinder 53 is a cylinder, its cylinder body fixed on the machine base 1, used to drive the trunnion pusher block 52 to reciprocate along the first trunnion feeding track 51. The front end face of the trunnion cap pusher 52 is a pushing surface, used to push the trunnion cap 7 forward. A trunnion cap positioning groove 511 is provided on the first trunnion cap feeding track 51 directly below the pressing station. This trunnion cap positioning groove 511 is a groove structure adapted to the outer contour of the trunnion cap 7, its size is only able to accommodate one trunnion cap 7, and the bottom of the groove has a through hole for the trunnion cap top rod 31 to pass through. When the trunnion cap pusher 52 pushes the trunnion cap 7 to the trunnion cap positioning groove 511, the trunnion cap 7 falls into the trunnion cap positioning groove 511 under gravity, achieving precise pre-positioning of the trunnion cap 7. (See further...) Figure 3 and Figure 4 The trunnion cap top rod 31 is vertically positioned directly below the trunnion cap positioning groove 511, and its lower end is connected to the trunnion cap top rod drive mechanism 32 (such as a lifting cylinder or servo electric cylinder). The top end of the trunnion cap top rod 31 has an upwardly protruding positioning shaft 311. The outer diameter of the positioning shaft 311 is adapted to the inner diameter of the trunnion cap 7, and is used to form a temporary sleeve with the trunnion cap 7 during the lifting process to prevent the trunnion cap 7 from tilting or falling off during the lifting process.

[0042] With the above structure, during operation, the trunnion cap vibratory plate 55 feeds the trunnion cap 7 sequentially into the second trunnion cap feeding track 54. Under the assistance of vibration, the trunnion cap 7 moves along the second trunnion cap feeding track 54 to its end and enters the middle intersection of the first trunnion cap feeding track 51. Subsequently, the trunnion cap pusher drive cylinder 53 extends, driving the trunnion cap pusher 52 to move forward along the first trunnion cap feeding track 51, pushing the trunnion cap 7 located at the intersection forward into the trunnion cap positioning groove 511 (during this process, the trunnion cap pusher 52 blocks the trunnion cap 7 in the second trunnion cap feeding track 54), and the trunnion cap 7 is positioned in the trunnion cap positioning groove. At this time, the trunnion cap push rod drive mechanism 32 drives the trunnion cap push rod 31 to move upward, the positioning shaft 311 inserts into the inner hole of the trunnion cap 7 and pushes the trunnion cap 7 upward, so that it is removed from the trunnion cap positioning groove 511 and tightly fitted onto the lower outer periphery of the trunnion body 6 (which has been pressed) in the pressing station, thus completing the pressing and fitting of the trunnion cap 7 and the trunnion body 6.

[0043] In some embodiments, see Figure 3 and Figure 4 The trunnion body pressing unit 2 is used to close the trunnion body 6, which has been pushed to the pressing station, from its initial open state to a closed state, so that it can be subsequently riveted to the trunnion cap 7. Specifically, the trunnion body pressing unit 2 includes a left pressing block 21 and a right pressing block 22 arranged opposite to each other, a left limiting slider module 23 and a right limiting slider module 24 for restricting the left pressing block 21 and the right pressing block 22 to move in the left and right directions, and a pressing block driving module 25 for driving the left pressing block 21 and the right pressing block 22 to move closer and further away synchronously. The left pressing block 21 and the right pressing block 22 are symmetrically arranged on the left and right sides of the support rod 12, and their opposing inner surfaces are respectively provided with pressing concave surfaces that are adapted to the side shape of the trunnion body 6 to ensure stable surface contact with the side of the trunnion body 6 during the closing process. Left pressure block 21 and right pressure block 22 are respectively mounted on left limit slider module 23 and right limit slider module 24. Both left limit slider module 23 and right limit slider module 24 include a linear slide rail extending in the left-right direction and a slider that slides along the slide rail. The slide rail is fixed to the machine base 1, and the slider is fixedly connected to the left pressure block 21 and right pressure block 22 respectively, thereby restricting the left pressure block 21 and right pressure block 22 to reciprocate only in the left-right direction. The pressure block drive module 25 includes a vertically movable drive block 251 and a vertical drive unit 252 (e.g., a cylinder) that drives the drive block 251 to move vertically. The drive block 251 has a left inclined portion 2511 and a right inclined portion 2512 at its left and right ends, respectively, which are wedge-shaped to cooperate with the left pressure block 21 and the right pressure block 22. The left inclined portion 2511 and the right inclined portion 2512 are both inclined surfaces that gradually slope outward from top to bottom. They are arranged symmetrically in a figure-eight shape, that is, the left inclined portion 2511 expands outward from top to bottom to the left, and the right inclined portion 2512 expands outward from top to bottom to the right.

[0044] Continue reading Figure 3Inclined slide rail pairs 253 are respectively provided between the left pressure block 21 and the left inclined portion 2511, and between the right pressure block 22 and the right inclined portion 2512, forming a sliding connection. For example, the inclined slide rail pair 253 includes an inclined guide rail fixed to the left inclined portion 2511 and the right inclined portion 2512, and an inclined slider correspondingly fixed to the left pressure block 21 and the right pressure block 22, or vice versa. The extension direction of the inclined guide rail and the inclined slider is consistent with the inclination direction of their respective inclined portions. Through the guiding and limiting function of the inclined slide rail pair 253, a stable sliding fit relationship is formed between the left pressure block 21 and the left inclined portion 2511, and between the right pressure block 22 and the right inclined portion 2512. This ensures that when the driving block 251 descends, the wedge-shaped inclined surface can effectively push the left and right pressure blocks inward to close, and when the driving block 251 rises, the inclined slide rail pair 253 drives the left and right pressure blocks to move outward synchronously, achieving active reset. With this structure, during operation, when the upper and lower drive unit 252 drives the drive block 251 to move downward, the left inclined part 2511 and the right inclined part 2512 slide relative to the left pressure block 21 and the right pressure block 22 respectively through the inclined slide rail pair 253. Under the action of the wedge effect, the left inclined part 2511 pushes the left pressure block 21 to the left, and the right inclined part 2512 pushes the right pressure block 22 to the right, so that the left pressure block 21 and the right pressure block 22 move synchronously inward (i.e., towards each other), applying closing pressure to the trunnion body 6 located between them, thus realizing the closing and pressing of the trunnion body 6. Since the left inclined part 2511 and the right inclined part 2512 adopt a symmetrical "eight"-shaped structure and are driven by the same drive block 251, the left pressure block 21 and the right pressure block 22 always maintain synchronous movement during the closing process, ensuring that the trunnion body 6 is subjected to uniform force and avoiding the trunnion body 6 from being tilted or not pressed in place due to uneven force on one side.

[0045] The automatic riveting device for clamp trunnions according to this invention operates as follows:

[0046] First, the trunnion body feeding unit 4 starts working: the trunnion body vibratory plate 41 arranges the disordered trunnion bodies 6 into an orderly manner and feeds them into the upper feeding track 421. The first direct vibration mechanism 423 drives the upper feeding track 421 to generate high-frequency micro-amplitude vibration, causing the trunnion bodies 6 to creep forward along the upper feeding track 421 and enter the lower feeding track 422 in sequence. The trunnion body blocking mechanism 43 drives the slider 432 to move back and forth through the drive cylinder 431. By using the linkage between the first drive hole 4321 and the blocking rod 433, and the second drive hole 4322 and the pressure rod 434, the pressure rod 434 and the blocking rod 433 are alternately extended and retracted, releasing only one trunnion body 6 at a time, allowing it to fall from the end of the lower feeding track 422 onto the support rod 12.

[0047] Subsequently, the trunnion body pushing mechanism 44 operates: the trunnion body driving mechanism 442 drives the trunnion body pushing block 441 to move forward. The longitudinal section of the trunnion body pushing block 441 is an open ring that surrounds the support rod 12. When moving, it can smoothly push the trunnion body 6 forward along the axis of the support rod 12 to the pressing station.

[0048] When the trunnion body 6 reaches the pressing station, the trunnion body pressing unit 2 performs the pressing action: the upper and lower driving unit 252 drives the driving block 251 to move downward, and the left oblique part 2511 and the right oblique part 2512 at the left and right ends of the driving block 251 respectively push the left pressing block 21 and the right pressing block 22 to apply closing pressure to the trunnion body 6, so that it completes the closing pressing.

[0049] At the same time, the trunnion cap feeding unit 5 feeds material synchronously: the trunnion cap vibrating plate 55 sends the trunnion cap 7 into the second trunnion cap feeding track 54 in an orderly manner, and moves it to the middle of the intersection with the first trunnion cap feeding track 51. The trunnion cap push block driving cylinder 53 drives the trunnion cap push block 52 to move forward, pushing the trunnion cap 7 directly below the pressing station and falling into the trunnion cap positioning groove 511 to achieve positioning.

[0050] Finally, the trunnion cap pressing unit 3 performs the fitting action: the trunnion cap top rod drive mechanism 32 drives the trunnion cap top rod 31 to move upward (the positioning shaft 311 is inserted into the inner hole of the trunnion cap 7 to form a temporary sleeve), and then pushes the trunnion cap 7 upward, so that it is disengaged from the trunnion cap positioning groove 511 and accurately fitted onto the lower outer periphery of the trunnion body 6 that has been closed, thereby completing the riveting of the trunnion body 6 and the trunnion cap 7 to form a complete trunnion.

[0051] After one riveting cycle is completed, the left pressure block 21, right pressure block 22, and trunnion cap top rod 31 are reset, and each feeding unit continues to transport the next workpiece, entering the next work cycle. The riveted trunnion is taken out from the front end of the support rod 12. The entire working process is coordinated by a control system (such as a PLC control system) to achieve fully automated continuous production.

[0052] For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this invention still fall within the scope of protection of this invention.

Claims

1. An automatic riveting device for clamp trunnions, characterized in that, It includes a machine base, a trunnion body pressing unit, a trunnion cap pressing unit, a trunnion body feeding unit, and a trunnion cap feeding unit; A support rod is fixed on the machine base by a connecting bracket. The support rod is connected to the trunnion body feeding unit. The support rod is arranged in the front-back direction and extends forward to the trunnion body pressing unit. The trunnion body feeding unit feeds the trunnion bodies one by one to the pressing station on the support rod. The trunnion cap pressing unit is located on the machine platform and below the pressing station. The trunnion cap feeding unit feeds trunnion caps one by one to the trunnion cap pressing unit. The trunnion cap pressing unit includes a vertically arranged trunnion cap top rod and a trunnion cap top rod driving mechanism for driving the trunnion cap top rod to move up and down. The trunnion body pressing unit presses the trunnion body on the pressing station of the support rod, and the trunnion cap top rod pushes the trunnion cap upward so that it is fitted onto the lower end of the trunnion body.

2. The automatic riveting device for clamp trunnions according to claim 1, characterized in that: The trunnion body feeding unit includes a trunnion body vibratory plate, a trunnion body conveying mechanism, a trunnion body blocking mechanism, and a trunnion body pushing mechanism. The feed end of the trunnion body conveying mechanism is connected to the trunnion body vibratory plate, and the discharge end of the trunnion body conveying mechanism extends close to the support rod. The trunnion body blocking mechanism is provided corresponding to the trunnion body conveying mechanism and is used to block and release the trunnion bodies conveyed by the trunnion body conveying mechanism one by one. The trunnion body pushing mechanism is used to push the individual trunnion bodies that have fallen on the support rod forward to the pressing station.

3. The automatic riveting device for clamp trunnions according to claim 2, characterized in that, The trunnion body conveying mechanism includes an upper feeding track and a lower feeding track that are sequentially connected along the trunnion body conveying direction. The upper feeding track and the lower feeding track are inclined. The upper feeding track is mounted on the first direct vibration mechanism. The trunnion body blocking mechanism is set corresponding to the lower feeding track. The lower end of the lower feeding track is close to the support rod and there is a clearance between the two.

4. The automatic riveting device for clamp trunnions according to claim 3, characterized in that, The trunnion body pushing mechanism includes a trunnion body push block that can move back and forth and a trunnion body driving mechanism that drives the trunnion body push block to move back and forth. The longitudinal cross-section of the trunnion body push block is an open annular shape and is arranged to surround the support rod.

5. The automatic riveting device for clamp trunnions according to claim 3, characterized in that, The trunnion main body retaining mechanism includes a drive cylinder, a slider, a retaining rod, and a pressing rod. The slider is positioned above the lower feeding track and is driven to move by the drive cylinder, with its movement direction being the same as the extension direction of the lower feeding track. The slider has a first drive hole and a second drive hole. The retaining rod and the pressing rod are mounted on the mounting base one after the other along the extension direction of the lower feeding track, and the pressing rod and the retaining rod are movable in a direction perpendicular to the extension direction of the lower feeding track. The end of the retaining rod away from the lower feeding track is provided with a first transmission wheel that mates with the first drive hole. The end of the pressing rod away from the lower feeding track is provided with a first transmission wheel that mates with the first drive hole. A second transmission wheel, which mates with the second drive hole, is provided at one end of the lower feeding track. The slider moves between a first position and a second position under the drive of the driving cylinder. The slider moves from the second position to the first position along a first direction. When the slider is in the second position, the stop rod is close to the lower feeding track and blocks the trunnion body, while the pressure rod is separated from the trunnion body. When the slider is in the first position, the stop rod is away from the lower feeding track and does not block the trunnion body, while the pressure rod is close to the trunnion body and presses down on it. When the slider moves in the first direction, the first driving hole drives the stop rod to move away from the lower feeding track to release the foremost trunnion body. Before the stop rod releases the foremost trunnion body, the second driving hole drives the pressure rod to move towards the lower feeding track to press down the next trunnion body following the foremost trunnion body. When the slider moves in the second direction opposite to the first direction, the stop rod moves towards the lower feeding track to block the trunnion body. Before the pressure rod releases the trunnion body it presses down, the stop rod has moved to the blocking position.

6. The automatic riveting device for clamp trunnions according to claim 5, characterized in that, The first driving hole and the second driving hole are arranged in a figure-eight shape; The first driving hole is a strip-shaped hole set at an angle to the movable direction of the slider; The second driving hole includes a first hole segment and a second hole segment that are connected to each other. The first hole segment is a strip-shaped hole that is set at an angle to the movable direction of the slider, and the second hole segment is a strip-shaped hole that is set along the movable direction of the slider. When the slider is in the second position, the second transmission wheel is in the first hole section; when the slider is in the first position, the second transmission wheel is in the second hole section.

7. The automatic riveting device for clamp trunnions according to claim 6, characterized in that, The lower feeding track is rod-shaped, and a pressure block is provided at one end of the pressure rod near the lower feeding track. The pressure block is provided with a rubber pad. A stop block is provided at one end of the stop rod near the lower feeding track. The stop block is provided with an opening groove facing the lower feeding track to avoid the lower feeding track.

8. The automatic riveting device for clamp trunnions according to claim 3, characterized in that, The trunnion cap feeding unit includes a first trunnion cap feeding track arranged in a front-to-back direction, a trunnion cap pusher block movably arranged on the first trunnion cap feeding track, a trunnion cap pusher block driving cylinder for driving the trunnion cap pusher block to move back and forth, a second trunnion cap feeding track perpendicular to the first trunnion cap feeding track, and a trunnion cap vibrating plate connected to the second trunnion cap feeding track; the end of the second trunnion cap feeding track is connected to the middle of the first trunnion cap feeding track, and a trunnion cap positioning groove is provided on the first trunnion cap feeding track below the pressing station. The trunnion cap positioning groove is suitable for accommodating a trunnion cap, and the trunnion cap top rod corresponds to the position of the trunnion cap positioning groove, and a positioning shaft suitable for engaging with the trunnion cap is provided at the top of the trunnion cap top rod.

9. The automatic riveting device for clamp trunnions according to claim 3, characterized in that, The trunnion body pressing unit includes a left pressing block and a right pressing block facing each other, a left limiting slider module and a right limiting slider module for restricting the left pressing block and the right pressing block to move in the left and right direction, and a pressing block driving module for driving the left pressing block and the right pressing block to move closer and further away synchronously; the pressing block driving module includes a driving block that can move up and down and an up and down driving unit for driving the driving block to move up and down. The left and right ends of the driving block are provided with a left oblique part and a right oblique part that respectively wedge with the left pressing block and the right pressing block. The left oblique part and the right oblique part are arranged in a figure-eight shape that opens outward from top to bottom.

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