Cutting machining equipment for frame of two-wheeled electric vehicle

Abstract

The invention discloses two-wheeled electric vehicle frame cutting machining equipment, and relates to the technical field of frame cutting machining, the two-wheeled electric vehicle frame cutting machining equipment comprises a base, and a mounting inclined plate is arranged at the top of the vertical end of the base and used for positioning a mounting rod piece; a laser cutting mechanism is arranged at the vertical end of the base and used for cutting the end of the rod piece. A collecting mechanism is arranged at the horizontal end of the base and used for collecting sweeps. A detection mechanism is arranged on the installation inclined plate and used for detecting the spacing distance between the two sides of the rod piece. The detection mechanism comprises a sliding frame arranged on the mounting inclined plate, a sliding block is arranged on the sliding frame in a sliding manner, a detection electric cylinder is arranged on the sliding block, and a buffer ejection mechanism is arranged at the inclined lower end of the sliding frame; straightening mechanisms are arranged on the two sides of the mounting inclined plate correspondingly and used for conducting straightening treatment on the two sides of the rod piece; the rod piece cutting and straightening device can cut and machine rod pieces, is rich in function, can detect and straighten the rod pieces before cutting, and guarantees the subsequent cutting and machining quality.

Description

Technical Field

[0001] The invention relates to the technical field of frame cutting and processing, and in particular to a two-wheeled electric vehicle frame cutting and processing equipment. Background Art

[0002] The frame of an electric two-wheeled vehicle is one of the core components of the vehicle. Different electric vehicles have different requirements on the material, shape, size and strength of the frame according to their uses and design styles. The frame is generally welded from different structural rods, and the ends of the rods are generally cut, that is, during the production process, the ends of the rods need to be repaired by cutting due to errors in the previous processing process. The existing cutting equipment has relatively simple functions and can only perform simple cutting processing. If there are defects in the structural form of the rod, it will have a certain impact on the subsequent cutting processing. Based on this, the present invention proposes a cutting equipment that can cut and process the rods, has rich functions, and can detect and straighten the rods before cutting to ensure the quality of subsequent cutting processing. Summary of the invention

[0003] In view of the above technical problems, the present invention can perform cutting processing on rods, has rich functions, and can detect and straighten the rods before cutting to ensure the quality of subsequent cutting processing.

[0004] The scheme used in the present invention is: a two-wheeled electric vehicle frame cutting and processing equipment, including a base, a mounting inclined plate is arranged on the top of the vertical end of the base for positioning and installing the rod; a laser cutting mechanism is arranged on the vertical end of the base for cutting and processing the end of the rod; a collecting mechanism is arranged on the horizontal end of the base for collecting waste chips; the collecting mechanism includes a guide plate slidably arranged on the base; a processing mechanism is arranged below the guide plate for processing burrs in the cutting area; a detection mechanism is arranged on the mounting inclined plate for detecting the spacing distance between the two sides of the rod; the detection mechanism includes a sliding frame arranged on the mounting inclined plate A sliding block is slidably arranged on the sliding frame, a detection electric cylinder is arranged on the sliding block, and a contact part is telescopically arranged on the telescopic rod of the detection electric cylinder; a magnetic attraction part is arranged at the oblique upper end of the sliding frame, and the magnetic attraction part is used for magnetically fixing the sliding block; a buffer ejection mechanism is arranged at the oblique lower end of the sliding frame, which is used for buffering and supporting the sliding block, and ejecting and pushing the sliding block; straightening mechanisms are respectively arranged on both sides of the mounting inclined plate, which are used for straightening both sides of the rod; the straightening mechanism includes a straightening slide seat slidably arranged on the mounting inclined plate, a straightening seat is slidably arranged on the straightening slide seat, two limit seats are slidably arranged on the straightening seat, and limit wheels are arranged on the limit seats.

[0005] Furthermore, the laser cutting mechanism includes a positioning electric cylinder arranged on the base, a mounting frame is arranged on the telescopic rod of the positioning electric cylinder, a motor 1 and a screw 1 are arranged on the mounting frame, and the motor 1 is used to drive the screw 1; a slide seat 1 is slidably installed on the mounting frame, and the slide seat 1 and the screw 1 form a spiral pair; a processing electric cylinder is arranged on the slide seat 1, and a laser cutting part and a release part are arranged on the telescopic rod of the processing electric cylinder, and an airflow box is arranged on the base, and the airflow box is connected with the release part to transmit cooling airflow.

[0006] Furthermore, the collecting mechanism comprises a second control electric cylinder arranged on the base, a collecting box one is arranged on the telescopic rod of the second control electric cylinder, and a guide plate is arranged on the top of the collecting box one.

[0007] Furthermore, the processing mechanism includes a control electric cylinder 1 arranged on the base, a flip motor is arranged on the telescopic rod of the control electric cylinder 1, a mounting ring is arranged on the output shaft of the flip motor, a processing motor is arranged on the mounting ring, and a grinding sleeve is arranged on the output shaft of the processing motor for grinding the cutting area, and a collection box 2 is arranged on the base and below the processing motor for collecting waste chips.

[0008] Furthermore, a fixing mechanism is provided on the mounting inclined plate for fixing the rod, and the fixing mechanism includes a fixed support frame arranged on the mounting inclined plate, a supporting electric cylinder is arranged on the inner side of the fixed support frame, and a supporting plate is arranged on the telescopic rod of the supporting electric cylinder for supporting the inner side of the fixed rod; a fixed electric cylinder is arranged on the mounting inclined plate, and a fixing plate is arranged on the telescopic rod of the fixed electric cylinder for fixing the top of the rod.

[0009] Furthermore, the detection mechanism includes a second magnetic attraction portion arranged on the sliding block, and the second magnetic attraction portion is magnetically fixed by the first magnetic attraction portion; a detector is arranged between the contact portion and the telescopic rod of the detection electric cylinder, and the detector is used to output a telescopic displacement signal of the feedback contact portion.

[0010] Furthermore, the buffer ejection mechanism includes an ejection electric cylinder and a buffer plate arranged obliquely below the sliding frame. A spring is connected between the buffer plate and the obliquely below the sliding frame. The buffer plate buffers and supports the sliding block, and the ejection electric cylinder pushes the buffer plate to eject and push the sliding block.

[0011] Furthermore, the straightening mechanism includes racks arranged on both sides of the mounting inclined plate, a moving motor is arranged on the straightening slide, a moving gear is arranged on the output shaft of the moving motor, and the moving gear is meshed with the rack; a straightening position electric cylinder is arranged on the straightening slide, and the telescopic rod of the straightening position electric cylinder is connected to the straightening seat.

[0012] Furthermore, a limit electric cylinder is arranged on the straightening seat, a push wheel is arranged on the telescopic rod of the limit electric cylinder, and a limit spring is connected between the two limit seats; a contact pushing part is arranged on the limit seat, and the contact pushing part is pushed by the push wheel.

[0013] Furthermore, when cutting, the height of the mounting frame is controlled by the position electric cylinder. When the motor works, the lead screw rotates, and the slide moves, the cutting position is controlled; the processing electric cylinder controls the movement of the laser cutting part, and laser cutting is performed in the cutting area of ​​the rod; the airflow box transmits the cooling airflow, and releases the cooling airflow through the release part, that is, cooling is performed during cutting.

[0014] Compared with the prior art, the present invention has the following advantages: (1) before cutting, the spacing distance between the two sides of the rod is detected, that is, whether the two sides of the rod are bent or skewed; specifically, the sliding block is located obliquely above the sliding frame, and the magnetic attraction part 1 is magnetically fixed to the magnetic attraction part 2, that is, the sliding block is fixed. When the fixed state of the sliding block is released, the sliding block slides along the sliding frame under the action of the gravity component until it is obliquely below the sliding frame. At the oblique lower part of the sliding frame, it can be buffered and supported by the buffer plate, eliminating the need for an external power source. During the sliding process, the detection electric cylinder controls the contact part to contact the inner side of the rod, that is, the contact part contacts and moves on the rod, and the detector outputs feedback on the telescopic displacement of the contact part, that is, whether the spacing between the two sides of the rod is uniform; (2) when the rod is detected to be skewed, the straightening position electric cylinder can be operated and the straightening seat can be moved to make the limit wheels located on both sides of the rod. , the push wheel is controlled to move by the limit electric cylinder, and the push wheel pushes the contact push part, thereby moving the limit seat, and the limit wheel contacts the rod. The moving motor works and the straightening slide moves under the gear rack transmission, that is, it moves along the oblique direction of the rod to straighten the two sides of the rod, which is beneficial to the subsequent laser cutting process; (3) The waste chips generated by the cutting can be guided to slide down by the guide plate, that is, collected in the collection box one. Further, when the cutting area is processed, the control electric cylinder two controls the transfer of the guide plate, that is, it is staggered with the cutting area of ​​the rod. The control electric cylinder one controls the movement of the processing motor so that the grinding sleeve is located in the cutting area. The processing motor works and the grinding sleeve rotates to remove burrs from the cutting area. Then the grinding sleeve is flipped by the flip motor, and the waste chips remaining on the inner side of the grinding sleeve can be dumped into the collection box two to complete the collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the structure of the collecting mechanism of the present invention.

[0017] Figure 3 It is a schematic diagram of the processing mechanism structure of the present invention.

[0018] Figure 4 It is a schematic diagram of the structure of the laser cutting mechanism of the present invention.

[0019] Figure 5This is a schematic diagram of the inclined plate structure of the present invention.

[0020] Figure 6 It is a schematic diagram of the structure of the detection mechanism of the present invention.

[0021] Figure 7 This is a schematic diagram of the installation structure of the detection mechanism of the present invention.

[0022] Figure 8 It is a schematic diagram of the structure of the straightening mechanism of the present invention.

[0023] Fig. 9 It is a schematic structural diagram of the straightening mechanism of the present invention from another angle.

[0024] Fig.10 It is a schematic diagram of the local structure of the straightening mechanism of the present invention.

[0025] Figure numerals: 1-base; 2-mounting inclined plate; 3-collection box 1; 4-guide plate; 5-collection box 2; 6-control electric cylinder 1; 7-control electric cylinder 2; 8-flip motor; 9-processing motor; 10-grinding sleeve; 11-mounting ring; 12-position electric cylinder; 13-mounting frame; 14-motor 1; 15-screw rod 1; 16-slide seat 1; 17-processing electric cylinder; 18-airflow box; 19-laser cutting part; 20-releasing part; 21-sliding frame; 22-fixed support frame; 23-rack; 24-fixed Electric cylinder; 25-fixed plate; 26-ejection electric cylinder; 27-buffer plate; 28-spring; 29-slide block; 30-magnetic attraction part one; 31-magnetic attraction part two; 32-support electric cylinder; 33-detection electric cylinder; 34-contact part; 35-detector; 36-support plate; 37-straightening slide; 38-moving gear; 39-moving motor; 40-straightening position electric cylinder; 41-straightening seat; 42-limiting electric cylinder; 43-push wheel; 44-limiting spring; 45-limiting seat; 46-limiting wheel; 47-contact pushing part. DETAILED DESCRIPTION

[0026] Example: Figures 1 to 10 As shown, a mounting inclined plate 2 is provided at the top of the vertical end of the base 1 for positioning and installing the rod; a laser cutting mechanism is provided on the vertical end of the base 1 for cutting the end of the rod; a collecting mechanism is provided on the horizontal end of the base 1 for collecting waste chips; the collecting mechanism includes a guide plate 4 slidably arranged on the base 1; a processing mechanism is provided below the guide plate 4 for processing burrs in the cutting area.

[0027] The laser cutting mechanism includes a positioning electric cylinder 12 arranged on a base 1, a mounting frame 13 is arranged on the telescopic rod of the positioning electric cylinder 12, a motor 14 and a screw 15 are arranged on the mounting frame 13, and the motor 14 is used to drive the screw 15; a slide 16 is slidably installed on the mounting frame 13, and the slide 16 and the screw 15 form a spiral pair; a processing electric cylinder 17 is arranged on the slide 16, and a laser cutting part 19 and a releasing part 20 are arranged on the telescopic rod of the processing electric cylinder 17, and an airflow box 18 is arranged on the base 1, and the airflow box 18 is connected with the releasing part 20 to transmit cooling airflow.

[0028] The collecting mechanism includes a control electric cylinder 2 7 arranged on the base 1, a collecting box 3 is arranged on the telescopic rod of the control electric cylinder 2 7, and a guide plate 4 is arranged on the top of the collecting box 3; the processing mechanism includes a control electric cylinder 1 6 arranged on the base 1, a flip motor 8 is arranged on the telescopic rod of the control electric cylinder 6, a mounting ring 11 is arranged on the output shaft of the flip motor 8, a processing motor 9 is arranged on the mounting ring 11, and a grinding sleeve 10 is arranged on the output shaft of the processing motor 9 for grinding the cutting area, and a collecting box 2 5 is arranged on the base 1 and below the processing motor 9 for collecting waste chips.

[0029] A fixing mechanism is provided on the mounting inclined plate 2 for fixing the rod, and the fixing mechanism includes a fixed support frame 22 provided on the mounting inclined plate 2, a supporting electric cylinder 32 is provided on the inner side of the fixed support frame 22, and a supporting plate 36 is provided on the telescopic rod of the supporting electric cylinder 32 for supporting the inner side of the fixed rod; a fixed electric cylinder 24 is provided on the mounting inclined plate 2, and a fixing plate 25 is provided on the telescopic rod of the fixed electric cylinder 24 for fixing the top of the rod.

[0030] A detection mechanism is provided on the mounting inclined plate 2 for detecting the spacing distance between the two sides of the rod; the detection mechanism comprises a sliding frame 21 provided on the mounting inclined plate 2, a sliding block 29 is slidably provided on the sliding frame 21, a detection electric cylinder 33 is provided on the sliding block 29, and a contact portion 34 is telescopically provided on the telescopic rod of the detection electric cylinder 33; a magnetic attraction portion 30 is provided at the upper oblique end of the sliding frame 21, and the magnetic attraction portion 30 is used for magnetically fixing the sliding block 29; a buffer ejection mechanism is provided at the lower oblique end of the sliding frame 21 for buffering and supporting the sliding block 29, and ejecting and pushing the sliding block 29; the detection mechanism includes It includes a magnetic attraction portion 21 31 arranged on the sliding block 29, and the magnetic attraction portion 21 is magnetically fixed by a magnetic attraction portion 1 30; a detector 35 is arranged between the contact portion 34 and the telescopic rod of the detection electric cylinder 33, and the detector 35 is used to output a telescopic displacement signal of the feedback contact portion 34; the buffer ejection mechanism includes an ejection electric cylinder 26 and a buffer plate 27 arranged obliquely below the sliding frame 21, and a spring 28 is connected between the buffer plate 27 and the oblique lower part of the sliding frame 21, and the sliding block 29 is buffered and supported by the buffer plate 27, and the buffer plate 27 is pushed by the ejection electric cylinder 26 to eject and push the sliding block 29.

[0031] Straightening mechanisms are respectively provided on both sides of the mounting inclined plate 2 for straightening both sides of the rod; the straightening mechanism comprises a straightening slide 37 slidably provided on the mounting inclined plate 2, a straightening seat 41 slidably provided on the straightening slide 37, two limit seats 45 slidably provided on the straightening seat 41, and a limit wheel 46 provided on the limit seat 45; the straightening mechanism comprises a rack 23 provided on both sides of the mounting inclined plate 2, a moving motor 39 provided on the straightening slide 37, and a moving motor 39 A moving gear 38 is provided on the output shaft, and the moving gear 38 is meshed with the rack 23; a straightening position electric cylinder 40 is provided on the straightening slide 37, and the telescopic rod of the straightening position electric cylinder 40 is connected to the straightening seat 41; a limit electric cylinder 42 is provided on the straightening seat 41, and a push wheel 43 is provided on the telescopic rod of the limit electric cylinder 42, and a limit spring 44 is connected between the two limit seats 45; a contact pushing portion 47 is provided on the limit seat 45, and the contact pushing portion 47 is pushed by the push wheel 43.

[0032] The working principle is as follows: the rod is placed on the mounting inclined plate 2, the top support of the mounting inclined plate 2 is mounted on the fixed support frame 22, the support plate 36 is controlled by the support electric cylinder 32 to be fixed, and the fixed plate 25 is controlled by the fixed electric cylinder 24 to be pressed and fixed; before cutting, the spacing distance between the two sides of the rod is detected, that is, whether the two sides of the rod are bent or skewed; specifically, the sliding block 29 is located obliquely above the sliding frame 21, and the magnetic attraction part 1 30 is magnetically fixed to the magnetic attraction part 2 31, that is, the sliding block 29 is fixed, and when the fixed state of the sliding block 29 is released, the sliding block 29 Under the action of gravity, it slides along the sliding frame 21 until it is diagonally below the sliding frame 21. At the diagonal below the sliding frame 21, it can be buffered and supported by the buffer plate 27. During the sliding process, the detection electric cylinder 33 controls the contact part 34 to contact the inner side of the rod, that is, the contact part 34 moves in contact on the rod, and the detector 35 outputs feedback on the telescopic displacement of the contact part 34, that is, whether the spacing on both sides of the rod is uniform. Further, the buffer plate 27 can be pushed by the ejection electric cylinder 26, so that the sliding block 29 can be ejected and pushed to the diagonal above the sliding frame 21, and then magnetically fixed by the magnetic suction part 30 again.

[0033] When the rod is detected to be skewed, the straightening position electric cylinder 40 can be operated, and the straightening seat 41 can be moved to make the limit wheels 46 located on both sides of the rod. The limit electric cylinder 42 can control the movement of the push wheel 43, and the push wheel 43 pushes the contact push part 47, thereby moving the limit seat 45, and the limit wheel 46 contacts the rod. The moving motor 39 works, and under the gear rack transmission, the straightening slide 37 moves, that is, it moves along the oblique direction of the rod to straighten the two sides of the rod, which is beneficial to the subsequent laser cutting process.

[0034] Furthermore, when cutting, the height of the mounting bracket 13 is controlled by the position electric cylinder 12, the motor 14 works, the screw 15 rotates, and the slide 16 moves, thereby controlling the cutting position; the processing electric cylinder 17 controls the movement of the laser cutting part 19 to perform laser cutting processing in the cutting area of ​​the rod; the airflow box 18 transmits cooling airflow and releases the cooling airflow through the release part 20, thereby performing cooling during cutting.

[0035] The waste chips generated by cutting can be guided to slide down by the guide plate 4 and collected in the collection box 3. Furthermore, when the cutting area is processed, the electric cylinder 2 7 is controlled to control the guide plate 4 to move, that is, to stagger it with the rod cutting area. The processing motor 9 is controlled to move by the electric cylinder 6 so that the grinding sleeve 10 is located in the cutting area. The processing motor 9 is operated to rotate the grinding sleeve 10 to remove burrs from the cutting area. Then, the grinding sleeve 10 is flipped by the flipping motor 8, and the waste chips remaining on the inner side of the grinding sleeve 10 can be dumped into the collection box 2 5 to complete the collection.

Claims

1. A two-wheeled electric vehicle frame cutting and processing equipment, comprising a base (1), wherein a mounting inclined plate (2) is provided at the top of the vertical end of the base (1) for positioning and mounting a rod; characterized in that: A laser cutting mechanism is arranged on the vertical end of the base (1) for cutting the end of the rod; a collecting mechanism is arranged on the horizontal end of the base (1) for collecting waste chips; the collecting mechanism comprises a guide plate (4) slidably arranged on the base (1); a processing mechanism is arranged below the guide plate (4) for processing burrs in the cutting area; a detection mechanism is arranged on the mounting inclined plate (2) for detecting the spacing between the two sides of the rod; the detection mechanism comprises a sliding frame (21) arranged on the mounting inclined plate (2), a sliding block (29) slidably arranged on the sliding frame (21), a detection electric cylinder (33) arranged on the sliding block (29), and a telescopic arrangement on the telescopic rod of the detection electric cylinder (33) A contact portion (34) is provided; a magnetic attraction portion (30) is provided at the upper oblique end of the sliding frame (21), and the magnetic attraction portion (30) is used to magnetically fix the sliding block (29); a buffer ejection mechanism is provided at the lower oblique end of the sliding frame (21), and is used to buffer and support the sliding block (29), and eject and push the sliding block (29); straightening mechanisms are provided on both sides of the mounting inclined plate (2), and are used to straighten both sides of the rod; the straightening mechanism comprises a straightening slide seat (37) slidably provided on the mounting inclined plate (2), a straightening seat (41) is slidably provided on the straightening slide seat (37), two limit seats (45) are slidably provided on the straightening seat (41), and a limit wheel (46) is provided on the limit seat (45).

2. The two-wheeled electric vehicle frame cutting and processing equipment according to claim 1 is characterized in that: The laser cutting mechanism comprises a positioning electric cylinder (12) arranged on a base (1); a mounting frame (13) is arranged on a telescopic rod of the positioning electric cylinder (12); a motor (14) and a screw (15) are arranged on the mounting frame (13); the motor (14) is used to drive the screw (15); a slide seat (16) is slidably mounted on the mounting frame (13); the slide seat (16) and the screw (15) form a spiral pair; a processing electric cylinder (17) is arranged on the slide seat (16); a laser cutting part (19) and a release part (20) are arranged on the telescopic rod of the processing electric cylinder (17); an airflow box (18) is arranged on the base (1); the airflow box (18) is connected to the release part (20) to transmit cooling airflow.

3. The two-wheeled electric vehicle frame cutting and processing equipment according to claim 1 is characterized in that: The collecting mechanism comprises a second control electric cylinder (7) arranged on a base (1), a collecting box (3) is arranged on a telescopic rod of the second control electric cylinder (7), and a guide plate (4) is arranged on the top of the collecting box (3).

4. The two-wheeled electric vehicle frame cutting and processing equipment according to claim 1 is characterized in that: The processing mechanism comprises a control electric cylinder (6) arranged on a base (1), a tilting motor (8) being arranged on a telescopic rod of the control electric cylinder (6), a mounting ring (11) being arranged on an output shaft of the tilting motor (8), a processing motor (9) being arranged on the mounting ring (11), a grinding sleeve (10) being arranged on the output shaft of the processing motor (9) for performing grinding processing on the cutting area, and a collection box (5) being arranged on the base (1) and below the processing motor (9) for collecting waste chips.

5. The two-wheeled electric vehicle frame cutting and processing equipment according to claim 1 is characterized in that: The mounting inclined plate (2) is provided with a fixing mechanism for fixing the rod, the fixing mechanism comprising a fixing support frame (22) provided on the mounting inclined plate (2), a supporting electric cylinder (32) provided inside the fixing support frame (22), a supporting plate (36) provided on the telescopic rod of the supporting electric cylinder (32) for supporting the inside of the fixing rod; the mounting inclined plate (22) is provided with a fixing electric cylinder (24), a fixing plate (25) provided on the telescopic rod of the fixing electric cylinder (24) for fixing the top of the rod.

6. The two-wheeled electric vehicle frame cutting and processing equipment according to claim 1 is characterized in that: The detection mechanism comprises a second magnetic attraction portion (31) arranged on the sliding block (29), the second magnetic attraction portion (31) being magnetically fixed by the first magnetic attraction portion (30); a detector (35) is arranged between the contact portion (34) and the telescopic rod of the detection electric cylinder (33), the detector (35) being used to output a telescopic displacement signal of the feedback contact portion (34).

7. The two-wheeled electric vehicle frame cutting and processing equipment according to claim 1 is characterized in that: The buffer ejection mechanism comprises an ejection electric cylinder (26) and a buffer plate (27) arranged obliquely below the sliding frame (21); a spring (28) is connected between the buffer plate (27) and the obliquely below the sliding frame (21); the buffer plate (27) buffers and supports the sliding block (29); the ejection electric cylinder (26) pushes the buffer plate (27) to eject and push the sliding block (29).

8. The two-wheeled electric vehicle frame cutting and processing equipment according to claim 1 is characterized in that: The straightening mechanism comprises racks (23) arranged on both sides of the mounting inclined plate (2); a moving motor (39) is arranged on the straightening slide (37); a moving gear (38) is arranged on the output shaft of the moving motor (39); the moving gear (38) is meshed with the racks (23); a straightening position electric cylinder (40) is arranged on the straightening slide (37); a telescopic rod of the straightening position electric cylinder (40) is connected to the straightening seat (41).

9. The two-wheeled electric vehicle frame cutting and processing equipment according to claim 8, characterized in that: A limit electric cylinder (42) is arranged on the straightening seat (41), a push wheel (43) is arranged on the telescopic rod of the limit electric cylinder (42), and a limit spring (44) is connected between the two limit seats (45); a contact push portion (47) is arranged on the limit seat (45), and the contact push portion (47) is pushed by the push wheel (43).

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