A universal fixture machine for an aircraft seat armrest

Abstract

The present invention discloses a universal clamp for an aircraft seat armrest, comprising: a positioning plate, a first clamping device arranged on the positioning plate, the first clamping device comprising a first positioning component for positioning a rough armrest on the positioning plate and a lateral locking component for fixing the rough armrest to be rough-processed, a second clamping device arranged on the positioning plate, the second clamping device comprising a first positioning component for positioning a rough-processed armrest on the positioning plate and a lateral pressing component for fixing a side-processed armrest; in the above manner, the present invention can clamp armrests of different sizes and shapes, thereby reducing production costs.

Description

Technical Field

[0001] The invention relates to the field of armrest clamps, in particular to a universal clamp for aviation seat armrests. Background Art

[0002] Among aviation products, aircraft seats are frequently upgraded, providing a comfortable and reliable ride for pilots and passengers. As the seat system for pilots, its safety and reliability directly impact the flight safety of the entire aircraft. Therefore, the stability and reliability of these frequently upgraded components directly impact aircraft flight safety.

[0003] According to customer needs, armrests generally have slightly different shapes and sizes, and the armrests are irregular in shape. Generally, there are multiple holes on the armrests for connecting the armrests to the seats. In order to make different armrests able to connect to the corresponding seats, the positions of the holes on these slightly different armrests are consistent;

[0004] During the manufacturing process of handrails, the handrails need to be rough-machined from the blank, and then the rough-machined handrails need to be processed again. Therefore, the handrails need to be fixed during processing, and a fixture is needed at this time. If a special fixture is designed for each handrail, the cost will be very high, and the manual clamping method will result in poor clamping. Summary of the Invention

[0005] The main technical problem solved by the present invention is to provide a universal clamp for aviation seat armrests, which can clamp armrests of different sizes and shapes and reduce production costs.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a universal clamp for an aviation seat armrest, comprising: a positioning plate;

[0007] A first clamping device is provided on the positioning plate, the first clamping device comprising a first positioning assembly for positioning the rough handrail on the positioning plate and a lateral locking assembly for fixing the rough handrail to be rough-machined;

[0008] A second clamping device is provided on the positioning, and the second clamping device includes a first positioning component for positioning the rough-machined handrail on the positioning plate and a lateral pressing component for fixing the side-machined handrail.

[0009] Preferably, the first positioning assembly includes a first positioning pin that matches the handrail hole and a first positioning block that abuts against the side of the handrail, and the first positioning pin and the first positioning block are arranged on the positioning plate.

[0010] Preferably, the lateral locking assembly includes a lateral fixing block arranged on the positioning plate, a lateral locking block that slides with the lateral fixing block, and a lateral sliding block that slides with the lateral locking block. The lateral sliding block is abutted against the side of the armrest. A locking hole is provided on the lateral locking block, and a locking screw facing the positioning plate is fitted on the locking hole. The lateral locking block moves vertically relative to the positioning plate, and the lateral locking block moves horizontally relative to the positioning plate.

[0011] Preferably, a first limiting groove is provided on the side of the lateral fixing block close to the side locking block, and a first limiting protrusion cooperating with the first limiting groove is provided on one side of the lateral locking block, and the lateral locking block is vertically moved relative to the positioning plate through the cooperation between the first limiting protrusion and the first limiting groove, and a second limiting groove is provided on the side of the lateral sliding block close to the lateral locking block, and a second limiting protrusion cooperating with the second limiting groove is provided on the side of the lateral locking block close to the lateral sliding block, and the lateral locking block is horizontally moved relative to the positioning plate through the cooperation between the second limiting protrusion and the second limiting groove.

[0012] Preferably, the first limiting groove includes a first sliding portion and a first limiting portion, the first limiting portion is arranged on both sides of the first sliding portion, the first limiting protrusion includes a first sliding block matched with the first sliding portion and a first limiting groove matched with the first limiting portion, the second limiting protrusion includes a second sliding block and a second limiting groove arranged obliquely relative to the positioning plate, the second limiting groove includes a second sliding portion matched with the second sliding block and a second limiting portion matched with the second limiting groove, and the second limiting portions are arranged on both sides of the second sliding portion.

[0013] Preferably, the lateral clamping assembly includes a fixed seat arranged on the positioning plate, a clamping drive member arranged on the fixed seat, a direction conversion plate rotatably connected to the clamping drive member, a pressure plate rotatably connected to the direction conversion plate at one end and slidingly engaged with the fixed seat at the other end, and the pressure plate is used to press the armrest.

[0014] Preferably, the pressure plate includes a connecting part and a sliding part, the connecting part is rotatably connected to the direction conversion plate, the sliding part is slidably matched with the fixed seat, the fixed seat is provided with a special-shaped long hole that limits the formation range of the pressure plate, the end of the sliding part close to the connecting part is connected to a first connecting pin that slidably matches the special-shaped long hole, the end of the sliding part away from the connecting part is provided with a limiting long hole that guides the pressure plate to move toward the armrest and press, and the fixed seat is provided with a second connecting pin that matches the limiting long hole.

[0015] Preferably, the locking screw is connected to a control assembly, which includes a control drive, a connecting head connected to the drive control member, a connecting rod rotatably connected to the connecting head, and a connecting pull rod connected to the connecting rod rotating rod, and the locking screw is connected to the connecting rod.

[0016] Preferably, a threaded hole is provided on the positioning plate, and the locking screw is threadably matched with the threaded hole.

[0017] Preferably, a support block for supporting the roughly processed handrail is provided on the positioning plate, a fixing threaded hole is opened on the support block, and a fixing screw is threadedly matched with the fixing threaded hole, and the fixing screw is against the handrail.

[0018] The beneficial effects of the present invention are:

[0019] 1. The armrest blank is clamped by the first clamping device. The lateral fixing block, lateral locking block, and lateral sliding block in the lateral locking assembly cooperate to convert the vertical force into a force toward the side of the armrest. As a result, the lateral locking block can abut and fix the side of armrests of different sizes.

[0020] 2. The rough-machined handrail is fixed again by the second clamping device to facilitate further processing. The force of the pressing driver, the direction conversion plate and the pressing plate in the lateral pressing assembly cooperate with each other to convert the force of the pressing driver into a push-pull force on the pressing plate. The pressing plate cooperates with the special-shaped long hole and the limiting long hole to facilitate the adjustment of the length of the pressing plate and the direction of movement, so that the pressing plate presses down the handrail to be processed.

[0021] 3. Through the mutual rotation of the connecting rod and the connecting pull rod, the clamping force can be automatically adjusted according to the size of the handrail shape, and then the connecting pull rod moves downward at different distances according to the different shapes of the handrail, so that the connecting rod will have a certain inclination to cooperate with the displacement of the connecting pull rod, and finally the handrail is clamped and processed in its natural state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a universal clamp for an aviation seat armrest and the positional relationship of the armrest;

[0023] Figure 2 This is a schematic diagram of the overall structure of a universal clamp for removing an armrest of an aviation seat according to the present invention;

[0024] Figure 3 This is a structural schematic diagram of a lateral locking assembly of a universal clamp for an aviation seat armrest according to the present invention;

[0025] Figure 4 This is a schematic diagram of the exploded structure of a lateral locking assembly of a universal clamp for an aviation seat armrest according to the present invention;

[0026] Figure 5 This is a schematic structural diagram of a control assembly of a universal clamp for an aviation seat armrest according to the present invention;

[0027] Figure 6This is a structural schematic diagram of a lateral pressing assembly of a universal clamp for an aviation seat armrest according to the present invention;

[0028] Figure 7 The diagram is a schematic diagram of the exploded structure of a lateral pressing assembly of a universal clamp for an aviation seat armrest according to the present invention.

[0029] The markings of the components in the accompanying drawings are as follows:

[0030] 1. Base plate; 10. Support column; 11. Positioning plate; 12. Support block; 122. Fixing screw; 123. Pressure ring plate;

[0031] 211, first positioning pin; 212, first positioning block; 22, lateral locking assembly; 221, lateral fixing block; 2211, first limiting groove; 22111, first sliding portion; 22112, first limiting portion;

[0032] 222, lateral locking block; 2221, first limiting protrusion; 22211, first sliding block; 22212, first limiting groove; 2222, notch; 2223, locking hole; 2224, locking screw; 2225, second

[0033] Limiting protrusion; 22251, second sliding block; 22252, second limiting groove;

[0034] 223, lateral sliding block; 2231, second limiting groove; 22311, second sliding portion; 22312, second limiting portion;

[0035] 31. Second positioning pin; 32. Lateral pressing assembly; 321. Fixed seat; 3211. Special-shaped long hole; 32111. Opening; 3212. Sliding groove; 322. Pressing drive member; 323. Direction conversion plate; 324. Pressing plate;

[0036] 3241, connecting portion; 3242, sliding portion; 32421, first connecting pin; 32422, limiting elongated hole;

[0037] 325, driving connecting block; 326, second connecting pin;

[0038] 4. Control assembly; 41. Control drive; 42. Connector; 43. Connecting rod; 431. Shockproof pad; 44. Connecting rod;

[0039] 5. Spring stopper;

[0040] 6. Armrest; 61. Slot. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0043] Example:

[0044] refer to Figure 1 A universal fixture for aircraft seat armrests includes a base plate 1 with support columns 10 bolted to the four corners. A positioning plate 11 is connected to the end of the support column 10 away from the base plate 1. The support columns 10 support the distance between the positioning plate 11 and the base plate 1. To ensure that the planes at all positions of the positioning plate 11 remain at the same height, the support columns 10 are designed to be the same height, with a 0.5mm margin left when each support column 10 is individually machined. After the four support columns 10 are assembled with the base plate 1, the 0.5mm margin is machined off on the machine, eliminating both machining errors and height errors caused by clamping.

[0045] refer to Figure 1-Figure 4 The positioning plate 11 is used to place the handrail 6 to be processed. The positioning plate 11 is blackened with pre-hardened P20. The positioning plate 11 is provided with a first clamping device for fixing the handrail 6 blank for rough processing and a second clamping device for fixing the rough-processed handrail 6;

[0046] The first clamping device includes a first positioning assembly and a lateral locking assembly 22. The first positioning assembly includes a first positioning pin 211 and a first positioning block 212. The first positioning pin 211 is fixed to the positioning plate 11 and is used to be inserted into a hole that has been processed on the handrail 6. The first positioning block 212 is bolted to the positioning plate 11 to fix the position of the first positioning block 212 on the positioning plate 11. The first positioning block 212 is set on one side of the handrail 6 to be processed and abuts against one side of the handrail 6.

[0047] The lateral locking assembly 22 is arranged on both sides of the armrest 6. The lateral locking assembly 22 includes a lateral fixing block 221 bolted to the positioning plate 11, a lateral locking block 222 slidingly matched with the lateral fixing block 221, and a lateral sliding block 223 slidingly matched with the lateral locking block 222. The lateral locking block 222 controls the position of the lateral sliding block 223. A first limiting groove 2211 is provided on one side of the lateral fixing block 221 close to the lateral locking block 222. The first limiting groove 2211 is C-shaped. A limiting groove 2211 includes a first sliding portion 22111 and a first limiting portion 22112. The first limiting portions 22112 are provided on both sides of the first sliding portion 22111, so that the first limiting groove 2211 is C-shaped. The first limiting portions 22112 limit the position of the lateral locking block 222 on the lateral fixing block 221, thereby preventing the lateral locking block 222 from detaching from the lateral fixing block 221, and also guide the sliding of the lateral locking block 222 on the lateral fixing block 221.

[0048] The lateral locking block 222 is provided with a first limiting protrusion 2221 that slides and cooperates with the first limiting groove 2211 at one end of the lateral locking block 222 close to the lateral fixing block 221. The first limiting protrusion is set in a T shape. The first limiting protrusion 2221 includes a first sliding block 22211 that cooperates with the first sliding portion 22111 and a first limiting groove 22212 that cooperates with the first limiting portion 22112. Therefore, through the mutual cooperation between the first limiting portion 22112 and the first limiting groove 22212, the lateral locking block 222 is restricted on the lateral fixing block 221 and forced to The lateral locking block 222 can only slide along the direction of the first limiting groove 2211, so that the lateral locking block 222 moves vertically relative to the positioning plate 11. In order to reduce the friction force when the first sliding block 22211 and the first sliding portion 22111 slide, a notch 2222 is provided on the contact surface of the first sliding block 22211 and the first sliding portion 22111, thereby reducing the friction area between the first sliding block 22211 and the first sliding portion 22111, making the sliding between the lateral locking block 222 and the lateral fixing block 221 smoother;

[0049] A locking hole 2223 is formed on the lateral locking block 222. A locking screw 2224 facing the positioning plate 11 is fitted on the locking hole 2223. The locking screw 2224 passes through the locking hole 2223 and abuts against the locking hole 2223, and then abuts against the lateral locking block 222. The locking hole 2223 is a countersunk hole. By controlling the locking screw 2224 to move downward, that is, to move toward the positioning plate 11, the lateral locking block 222 is controlled to move downward, that is, to move toward the positioning plate 11.

[0050] A second limiting protrusion 2225 is provided on one end of the lateral locking block 222 away from the lateral fixed block 221, and is slidably engaged with the lateral sliding block 223. The second limiting protrusion 2225 is arranged in a T-shape. The second limiting protrusion 2225 is arranged obliquely, so as to form a certain angle with the vertical downward movement direction of the lateral locking block 222.

[0051] The second limiting protrusion 2225 includes a second sliding block 22251 and a second limiting groove 22252. The second sliding block 22251 and the second limiting groove 22252 are arranged obliquely.

[0052] The second limiting groove 2231 is provided on the side of the lateral sliding block 223 close to the lateral locking block 222, and the second limiting groove 2231 is matched with the second limiting protrusion 2225. The second limiting groove 2231 is set in a C shape, and the second limiting groove 2231 includes a second sliding portion 22311 and a second limiting portion 22312. The second limiting portion 22312 is set on both sides of the second sliding portion 22311, so that the second limiting groove 2231 is set in a C shape. The second sliding portion 22311 is slidably matched with the second sliding block 22251, and the second limiting portion 22312 is matched with the second limiting groove 22252, so that the lateral sliding block 223 is restricted on the lateral locking block 222 and forces the lateral sliding block 223 to slide only along the inclined direction of the second sliding block 22251. The second stop groove 22252 is arranged obliquely, so that the second sliding portion 22311 and the second stop portion 22312 are also arranged obliquely accordingly, and then, when the lateral locking block 222 moves vertically downward, the second stop protrusion 2225 forces the lateral sliding block 223 to move to one side, that is, to move toward the side of the armrest 6, so that the lateral locking block 222 moves horizontally relative to the positioning plate 11, that is, the vertical downward force of the lateral locking block 222 is converted into a lateral clamping force toward the left and right sides of the armrest 6 by the lateral sliding block 223, thereby clamping the armrest 6, and then the lateral sliding block 223 is against the side of the armrest 6, so that the armrest 6 in the blank state is fixed to the positioning plate 11 under the joint action of the first positioning block 212 and the plurality of lateral locking assemblies 22;

[0053] Because the lateral sliding block 223 and the lateral locking block 222 are in sliding fit, the distance the lateral locking block 222 moves downward can be controlled by controlling the distance the locking screw 2224 moves downward, and then the distance the lateral sliding block 223 moves downward can be controlled by controlling the distance the lateral locking block 222 moves downward, so that the lateral sliding block 223 can clamp blank armrests 6 of different sizes, so that the difference in size of the blank armrests 6 will not affect its clamping.

[0054] refer to Figure 2 and Figure 3In order to control and maintain the downward position of the lateral locking block 222, a threaded hole can be opened at the corresponding position of the positioning plate 11, and the locking screw 2224 is threadedly engaged with the positioning plate 11 through the threaded hole, so that the locking screw 2224 is abutted against the lateral locking block 222, and then under the action of the lateral locking block 222, the lateral sliding block 223 is abutted against the side of the armrest 6.

[0055] refer to Figure 2 、 Figure 3 and Figure 5 In order to control and maintain the downward movement of the lateral locking block 222, the locking screw 2224 is connected to the control component 4, which includes a control drive 41, a connecting head 42 connected to the control drive 41, a connecting rod 43 connected to the connecting head 42, and a connecting pull rod 44 connected to the connecting rod 43. The locking screw 2224 is fixedly connected to the connecting pull rod 44. The control drive 41 can be an air cylinder, an oil cylinder, a hydraulic cylinder, etc. The control drive 41 is connected to the positioning plate 11 or the base plate 1 by a bolt. The piston rod of the control drive 41 is fixedly connected to the connecting head 42, so that the piston rod drives the connecting head 42 to move up and down. The connecting head 42 is a Y-shaped connecting head 44. 2. The connecting head 42 is rotatably connected to the connecting rod 43 through a rotating shaft, so that the connecting rod 43 can rotate on the connecting head 42. Both ends of the connecting rod 43 are connected to the connecting rod 44 through a rotating shaft, so that the connecting rod 44 can rotate relative to the connecting rod 43. A through hole is provided on the positioning plate 11 to allow the connecting rod 44 to pass through. A threaded hole is provided on one end of the connecting rod 44 near the locking screw 2224, so that the connecting rod 44 passes through the through hole and is threadedly connected to the locking screw 2224, thereby controlling the driving member 41 to drive the connecting rod 44 to move up and down, thereby driving the lateral locking block 222 to move up and down, and then controlling the lateral sliding block 223 to clamp the blank handrail 6;

[0056] By connecting the connecting rods 44 to both ends of the connecting rod 43, the control driving member 41 can control the lateral locking blocks 222 on both sides of the armrest 6, and then can control the 223 to clamp the two sides of the armrest 6 under the action of the control driving member 41, and the clamping force can be automatically adjusted according to the size of the armrest 6 under the mutual rotation cooperation of the connecting rod 43 and the connecting rod 44, and then the connecting rod 44 moves downward by different distances according to the different shapes of the armrest 6, so that the connecting rod 43 will produce a certain inclination to cooperate with the displacement of the connecting rod 44, and finally the armrest 6 is clamped and processed in its natural state, thereby preventing the stress concentration on the armrest 6 caused by conventional fixed position clamping, which leads to the defect that the processed product is deformed and cannot meet the requirements, and at the same time further improves the efficiency and stability of clamping and reduces the production cost;

[0057] In order to reduce the impact of the connecting rod 43 on the lower side of the positioning plate 11 when the connecting rod 43 moves, a shock-proof pad 431 is fixedly provided on the connecting rod 43, thereby increasing the service life of the connecting rod 43. The control drive member 41 is electrically connected to the controller;

[0058] The connecting rod 43 and the connecting pull rod 44 are made of 45# steel and are tempered to ensure a hardness of HRC28-32. In order to prevent rust, they are blackened after processing.

[0059] refer to Figure 1 、 Figure 2 、 Figure 6 and Figure 7 The second clamping device includes a second positioning assembly and a lateral pressing assembly 32. The second positioning assembly includes a second positioning pin 31, which is fixed to the positioning plate 11 and is used to insert into the hole position of the rough-machined handrail 6, thereby playing the role of positioning the handrail 6. The positioning plate 11 is bolted to a support block 12 for supporting the position of the rough-machined handrail 6. A fixing threaded hole is opened on the support block 12, and the position of the fixing threaded hole corresponds to the hole position on the handrail 6. The fixing threaded hole is threadedly matched with a fixing screw 122, so that the handrail 6 is fixed to the support block 12 by the fixing screw 122. In order to increase the pressure area of the armrest 6 and the fixing screw 122 and to enable the fixing screw 122 to press and fix the larger hole position, a pressure ring plate 123 is pressed on the head of the fixing screw 122, and the pressure ring plate 123 is pressed on the hole position of the handrail 6 by the head of the fixing screw 122, thereby better playing the role of fixing the handrail 6.

[0060] The lateral clamping component 32 is used to press the roughly processed armrest 6. At this time, a groove 61 is opened on the protrusion of the side of the armrest 6. The groove 61 of the armrest 6 is pressed by the lateral clamping component 32, thereby further stabilizing the position of the armrest 6 on the mounting plate, thereby facilitating the secondary processing of the armrest 6.

[0061] refer to Figure 6 and Figure 7The lateral pressing assembly 32 includes a fixed seat 321, a pressing driving member 322 arranged on the fixed seat 321, a direction conversion plate 323 connected to the pressing driving member 322, and a pressure plate 324 connected to the direction conversion plate 323 at one end. The pressure plate 324 is arranged on the fixed seat 321. The fixed seat 321 is used to limit the displacement range and displacement direction of the pressure plate 324. The pressing driving member 322 can be a cylinder, a hydraulic cylinder or an oil cylinder. The pressing driving member 322 is bolted to the fixed seat 321, and the fixed seat 321 is bolted to the positioning plate 11. The piston rod of the pressing driving member 322 is fixedly connected to the driving connection block 325. The cam 324 is provided with a plurality of springs, and the cam 325 is provided with a plurality of springs, and the cam 325 is provided with a plurality of springs, and the plurality of springs are provided with a plurality of springs. The cam 3221 is a substantially parallel plate 3242 that is provided on the cam 3222. The cam 3222 is a substantially parallel plate 3242 that is provided on the cam 3222. The cam 3222 is a substantially parallel plate 3242 that is provided on the cam 3222. The cam 3222 is a substantially parallel plate 3242 that is provided on the cam 3222. The first connecting pin 32421 is fixed to the elongated hole 3211 so that when the pressure plate 324 slides, the first connecting pin 32421 is restricted in the special-shaped elongated hole 3211, thereby preventing the pressure plate 324 from detaching from the fixing seat 321. The special-shaped elongated hole 3211 is provided with an opening 32111 at one end close to the armrest 6, the purpose of which is to reduce the restriction of the freedom of the first connecting pin 32421 when it moves from the special-shaped elongated hole 3211 to one end of the opening 32111, so that the first connecting pin 32421 has more room for movement. A slight ridge is provided at the opening 32111, the purpose of which is to make the first connecting pin 32421 slide more stably in the special-shaped elongated hole 3211.

[0062] When the locking cam 326 is unlocked, the locking cam 326 can be unlocked, and the winch 320 can be unlocked when the winch 320 is unlocked.

[0063] Under the action of the clamping drive member 322, the driving connecting block 325 is driven to perform reciprocating motion, thereby driving the direction conversion plate 323 to perform reciprocating motion, and then driving the pressure plate 324 to perform reciprocating operation. Since the special-shaped long hole 3211 on the fixed seat 321 limits the reciprocating motion of the first connecting pin 32421, and under the action of the hinge pair, the first connecting pin 32421 performs reciprocating motion along the two ends of the special-shaped long hole 3211, when the first connecting pin 32421 reaches one end of the special-shaped long hole 3211 close to the armrest 6, the pressure plate 324 moves downward to press the armrest 6.

[0064] The positions of the first connecting pin 32421, the second connecting pin 326 or the rotating shaft can be stabilized by providing spring stoppers 5 at both ends of the first connecting pin 32421, the second connecting pin 326 or the rotating shaft.

[0065] In order to increase the service life of the fixed seat 321, the direction conversion plate 323, the first connecting pin 32421, the second connecting pin 326 and the pressure plate 324, GCr15 material is used and heat-treated to ensure that its surface hardness reaches HRC58 or above to increase its wear resistance. In order to prevent deformation due to long-term storage, the remaining materials of the lateral clamping component 32 are C45 steel and tempered. In order to prevent the lateral clamping component 32 from rusting, it is blackened.

[0066] Operation process: Place the handrail 6 in a rough state that needs to be rough-machined on the first positioning pin 211 with one side in contact with the first positioning block 212 for positioning. Then start the control drive member 41 to drive the connecting rod 44 to move downward, thereby forcing the locking screw 2224 to move downward, thereby driving the lateral locking block 222 to move downward, thereby causing the lateral sliding block 223 to abut against the side of the handrail 6, thereby fixing the position of the handrail 6.

[0067] Take out the rough-processed armrest 6, and then place it on the second positioning pin 31 and the support block 12, use the fixing screw 122 to fix the position of the armrest 6, and then start the clamping drive member 322. Under the action of the clamping drive member 322, the driving connecting block 325 is driven to reciprocate, thereby driving the direction conversion plate 323 to reciprocate, and then driving the pressure plate 324 to reciprocate. Since the special-shaped long hole 3211 on the fixed seat 321 limits the reciprocating motion of the first connecting pin 32421, and under the action of the hinge pair, the first connecting pin 32421 reciprocates along the two ends of the special-shaped long hole 3211. When the first connecting pin 32421 reaches one end of the special-shaped long hole 3211 close to the armrest 6, with the cooperation of the limiting long hole 32422, the pressure plate 324 moves downward, thereby clamping the armrest 6.

[0068] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A universal fixture for an aviation seat armrest, characterized in that: include: Positioning plate (11); A first clamping device is provided on the positioning plate (11), the first clamping device comprising a first positioning assembly for positioning the rough handrail (6) on the positioning plate (11) and a lateral locking assembly (22) for fixing the rough handrail (6) to be rough-machined; A second clamping device is provided on the positioning plate (11), the second clamping device comprising a second positioning assembly for positioning the rough-machined handrail (6) on the positioning plate (11) and a lateral pressing assembly (32) for fixing the rough-machined handrail (6); The lateral pressing assembly (32) includes a fixing seat (321) provided on the positioning plate (11), a pressing driving member (322) provided on the fixing seat (321), a direction conversion plate (323) rotatably connected to the pressing driving member (322), and a pressing plate (324) rotatably connected to the direction conversion plate (323) at one end and slidingly engaged with the fixing seat (321) at the other end, wherein the pressing plate (324) is used for pressing the armrest (6); The pressure plate (324) includes a connecting portion (3241) and a sliding portion (3242), wherein the connecting portion (3241) is rotatably connected to the direction conversion plate (323), and the sliding portion (3242) is slidably matched with the fixed seat (321). The fixed seat (321) is provided with a special-shaped long hole (3211) for limiting the travel range of the pressure plate (324), and one end of the sliding portion (3242) close to the connecting portion (3241) is connected to a first connecting pin (32421) that slidably matches the special-shaped long hole (3211), and one end of the sliding portion (3242) away from the connecting portion (3241) is provided with a limiting long hole (32422) that guides the pressure plate (324) to move toward the armrest (6) and press, and the fixed seat (321) is provided with a second connecting pin (326) that matches the limiting long hole (32422).

2. The universal fixture for an aircraft seat armrest according to claim 1, characterized in that: The first positioning assembly comprises a first positioning pin (211) matched with a hole of the handrail (6) and a first positioning block (212) abutting against a side of the handrail (6); the first positioning pin (211) and the first positioning block (212) are arranged on the positioning plate (11).

3. The universal fixture for an aircraft seat armrest according to claim 1, characterized in that: The lateral locking assembly (22) includes a lateral fixing block (221) arranged on the positioning plate (11), a lateral locking block (222) slidingly matched with the lateral fixing block (221), and a lateral sliding block (223) slidingly matched with the lateral locking block (222), wherein the lateral sliding block (223) abuts against the side of the armrest (6), a locking hole (2223) is provided on the lateral locking block (222), and a locking screw (2224) facing the positioning plate (11) is matched on the locking hole (2223), the lateral locking block (222) moves vertically relative to the positioning plate (11), and the lateral sliding block (223) moves horizontally relative to the positioning plate (11).

4. The universal fixture for an aircraft seat armrest according to claim 3, characterized in that: The side fixing block (221) is provided with a first limiting groove (2211) on one side close to the side locking block (222), and the side locking block (222) is provided with a first limiting protrusion (2221) that matches the first limiting groove (2211). The first limiting protrusion (2221) and the first limiting groove (2211) cooperate with each other to enable the side locking block (222) to move vertically relative to the positioning plate (11), and the side sliding block (223 ) A second limiting groove (2231) is provided on the side close to the lateral locking block (222), and a second limiting protrusion (2225) is provided on the side close to the lateral sliding block (223) to cooperate with the second limiting groove (2231). The lateral sliding block (223) moves horizontally relative to the positioning plate (11) through the cooperation between the second limiting protrusion (2225) and the second limiting groove (2231).

5. The universal fixture for an aircraft seat armrest according to claim 4, characterized in that: The first limiting groove (2211) includes a first sliding portion (22111) and a first limiting portion (22112), the first limiting portion (22112) is arranged on both sides of the first sliding portion (22111), the first limiting protrusion (2221) includes a first sliding block (22211) matched with the first sliding portion (22111) and a first limiting groove (22212) matched with the first limiting portion (22112), and the second limiting protrusion (2225) includes a second sliding block (22251) and a second limiting groove (22252) arranged obliquely relative to the positioning plate (11), the second limiting groove (2231) includes a second sliding portion (22311) matched with the second sliding block (22251) and a second limiting portion (22312) matched with the second limiting groove (22252), and the second limiting portion (22312) is arranged on both sides of the second sliding portion (22311).

6. The universal fixture for an aircraft seat armrest according to claim 3, characterized in that: The locking screw (2224) is connected to a control assembly (4), and the control assembly (4) includes a control drive (41), a connecting head (42) connected to the control drive (41), a connecting rod (43) rotatably connected to the connecting head (42), and a connecting pull rod (44) rotatably connected to the connecting rod (43), and the locking screw (2224) is connected to the connecting rod (43).

7. The universal fixture for an aircraft seat armrest according to claim 1, characterized in that: The positioning plate (11) is provided with a support block (12) for supporting the roughly processed handrail (6), and the support block (12) is provided with a fixing threaded hole, and the fixing threaded hole is threadedly matched with a fixing screw (122), and the fixing screw (122) is against the handrail (6).

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