Tool for quickly installing power license plate

Abstract

The invention discloses a tool for quickly installing an electric power number plate, and relates to the field of auxiliary installation of the electric power number plate, the tool comprises an installation plate, two side edges of the installation plate are fixedly connected with side clamping mechanisms, the other end of each side clamping mechanism is fixedly connected with a moving mechanism, and one side of the installation plate is provided with a plate pressing mechanism. According to the electric pole number plate clamping device, an electric pole number plate is attracted through multiple sets of magnet blocks, two sets of side claws are stressed to clamp the electric pole number plate, clamping of the electric pole number plates with different lengths is achieved within a certain range, movable rods of two sets of second electric cylinders are controlled to stretch at the same time, the side claws corresponding to the movable rods are pushed at the same time, and the two sets of side claws press the two ends of the electric pole number plate to be attached to the surface of an electric pole; and the magnet block is installed on the third spring which is bent and deformed, so that the magnet block always attracts the middle of the electric power number plate, it is guaranteed that the electric power number plate does not fall off, after the electric power number plate is completely attached to the electric pole, an operator does not need to hold the electric power number plate with hands or fix screws with two hands, at the moment, operation is convenient, and the installation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of auxiliary installation of electric power license plates, in particular to a tool for quickly installing electric power license plates. Background Art

[0002] The power number plate is an important identification tool used to identify equipment in the power system, aiming to achieve effective management and safe control of power resources. It is usually composed of numbers and designed according to different specifications and requirements to facilitate the rapid identification of related objects in power operation, maintenance and daily management.

[0003] However, in the prior art, most power number plates are installed on electric poles. The operator climbs up the pole with the help of tools, holds the power number plate with one hand, and screws the screws with the other hand. However, it is very inconvenient to screw the screws with one hand. In addition, the electric pole is hard, and the screws can easily fall over, resulting in troublesome installation operations and low efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a tool for quickly installing a power plate, so as to solve the problem proposed in the above background technology that the operator climbs up the pole with the help of the tool, holds the power plate with one hand, and screws the screws with the other hand. However, it is very inconvenient to screw the screws with one hand. In addition, the pole is hard, and the screws can easily fall over, resulting in troublesome installation operations and low efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tool for quickly installing a power license plate, comprising a mounting plate, both sides of the mounting plate are fixedly connected with side clamping mechanisms, the other end of each group of the side clamping mechanisms is fixedly connected with a moving mechanism, one side of the mounting plate is provided with a card pressing mechanism, and the card pressing mechanism is located above the side clamping mechanism; The side clamping mechanism and the moving mechanism form a single-sided clamping mechanism. The two sets of single-sided clamping mechanisms are used to clamp the electric pole. The moving mechanism is used to drive the electric number plate to move along the electric pole to a specified position. The pressing mechanism sucks the electric number plate and fits it to the surface of the electric pole. The card pressing mechanism includes a slide, a second electric cylinder, a screw, a mounting block, side claws, a third spring and a magnet block. A slide groove is opened inside the mounting plate, and the slide is slidably clamped on the inner wall of the slide groove. The second electric cylinder is fixedly connected to the other side of the slide, and the side claw is fixedly connected to the movable end of the second electric cylinder. The screw is threadedly connected to the middle of the slide, and one end of the screw is rotatably connected to the middle of the mounting block. Multiple groups of the third springs are clamped between two groups of the side claws in a parallel manner, and multiple groups of the magnet blocks are respectively fixedly connected to the middle of multiple groups of the third springs.

[0006] Preferably, the mounting block is fixedly connected to one side of the mounting plate, and the mounting block and the slide seat are located at the same height.

[0007] Preferably, the side clamping mechanism comprises a first mounting seat, a first side rod, a cross rod, a second side rod, a second mounting seat and a first electric cylinder, and the first mounting seat and the second mounting seat are both fixedly connected to the same side of the mounting plate.

[0008] Preferably, the first side rod is fixedly connected to the second side rod through the cross rod, and the first side rod is rotatably connected to the first mounting seat.

[0009] Preferably, the second side rod is rotatably connected to the second mounting seat, and the end of the second side rod is rotatably connected to the end of the movable rod of the first electric cylinder.

[0010] Preferably, the first electric cylinder is rotatably connected to the inside of the second mounting seat.

[0011] Preferably, the moving mechanism includes a connecting plate, a first cam, a first wheel frame, a connecting rod, a center frame, a motor, a second wheel frame, a second cam, a first spring, a second spring, a driven pulley, a synchronous belt and a driving pulley, and the connecting plate is fixedly connected to the cross bar.

[0012] Preferably, the first wheel frame and the middle frame are rotatably connected to two ends of a protrusion on one side of the connecting plate, respectively, and the first wheel frame and the middle frame are rotatably connected to the connecting rod, respectively.

[0013] Preferably, the first cam wheel is rotatably mounted in the middle of the first wheel frame, one end of the first wheel frame is connected to the other end of the center frame through the second spring, one end of the second wheel frame is rotatably connected to the middle of one end of the center frame, and the other end of the center frame is connected to the middle of the second wheel frame through the first spring.

[0014] Preferably, the second cam is rotatably mounted on the other end of the second wheel frame, the driven pulley is fixedly mounted on one end of the shaft of the second cam, the driven pulley is transmission-connected to the driving pulley via the synchronous belt, the driving pulley is fixedly mounted on the rotating shaft of the motor, and the motor is fixedly mounted in the middle of the second wheel frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, multiple groups of magnet blocks are used to suck the middle position of the front side of the power license plate, and two groups of side claws are forced to clamp the power license plate. Within a certain range, the clamping of power license plates of different lengths is realized. After the side clamping mechanism and the moving mechanism work, the tool carries the power license plate and moves on the outer surface of the pole. When the power license plate moves to the installation position of the pole, the movable rods of the two groups of second electric cylinders are controlled to extend at the same time, and the corresponding side claws are pushed at the same time. The two groups of side claws press the two ends of the power license plate to fit the surface of the pole, and the magnet block is installed on the third spring of bending deformation, so that the magnet block always sucks the middle part of the power license plate to ensure that the power license plate does not fall off. After the power license plate is completely attached to the pole, the operator does not need to hold the power license plate with his hands, and can fix the screws with both hands. At this time, the operation is more convenient and the installation efficiency is improved.

[0016] 2. In the present invention, by placing the tool on the surface of the pole and controlling the first electric cylinder to start, the movable rod of the first electric cylinder is extended, pushing one end of the second side rod outward, so that the second side rod moves in a fan shape around the connection point with the second mounting seat, and the V-shaped frame composed of the first side rod, the cross rod and the second side rod drives the moving mechanism to fit the side of the pole, thereby the two groups of moving mechanisms fit the pole, and when the V-shaped frame is continuously subjected to force and exerts force on the moving mechanism, the tool remains stationary on the outer surface of the pole.

[0017] 3. In the present invention, by controlling the motor to start, the motor drives the active pulley to rotate, and after being driven by the synchronous belt, drives the driven pulley to rotate, thereby driving the second concave wheel to rotate in the second wheel frame. At this time, the second concave wheel drives the first concave wheel to roll on the outer surface of the pole, so that the tool carries the power license plate and moves on the outer surface of the pole. In the process of narrowing the three-dimensional frame, the second spring inside it is stretched and deformed, and the first spring between the three-dimensional frame and the second wheel frame is also stretched and deformed. The elastic force generated by the deformation of the two ensures that the first concave wheel and the second concave wheel can roll smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a tool for quickly installing an electric power license plate according to the present invention; Figure 2 A front view of a tool for quickly installing an electric power plate according to the present invention; Figure 3 A side view of a tool for quickly installing an electric power plate according to the present invention; Figure 4 It is a three-dimensional structural schematic diagram of a side clamping mechanism in a tool for quickly installing a power license plate of the present invention; Figure 5 It is a schematic diagram of a first three-dimensional structure of a moving mechanism in a tool for quickly installing an electric number plate of the present invention; Figure 6 It is a second three-dimensional structural schematic diagram of a moving mechanism in a tool for quickly installing an electric number plate of the present invention; Figure 7 It is a first three-dimensional structural schematic diagram of a plate pressing mechanism in a tool for quickly installing a power plate according to the present invention; Figure 8 This is a second three-dimensional structural schematic diagram of a plate pressing mechanism in a tool for quickly installing a power plate according to the present invention.

[0019] In the figure: 1. mounting plate; 2. side clamping mechanism; 21. first mounting seat; 22. first side rod; 23. cross rod; 24. second side rod; 25. second mounting seat; 26. first electric cylinder; 3. moving mechanism; 31. connecting plate; 32. first concave wheel; 33. first wheel frame; 34. connecting rod; 35. middle frame; 36. motor; 37. second wheel frame; 38. second concave wheel; 39. first spring; 310. second spring; 311. driven pulley; 312. synchronous belt; 313. driving pulley; 4. card pressing mechanism; 41. slide groove; 42. slide seat; 43. second electric cylinder; 44. screw; 45. mounting block; 46. side claw; 47. third spring; 48. magnet block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Reference Figure 1 - Figure 8As shown: a tool for quickly installing a power plate, comprising a mounting plate 1, both sides of the mounting plate 1 are fixedly connected with side clamping mechanisms 2, the other end of each set of side clamping mechanisms 2 is fixedly connected with a moving mechanism 3, a plate pressing mechanism 4 is arranged on one side of the mounting plate 1, the plate pressing mechanism 4 is located above the side clamping mechanism 2, the side clamping mechanism 2 and the moving mechanism 3 form a single-sided clamping mechanism, the two sets of single-sided clamping mechanisms are used to clamp the electric pole, the moving mechanism 3 is used to drive the power plate to move to a specified position along the electric pole, the plate pressing mechanism 4 sucks the power plate and fits it to the surface of the electric pole, the plate pressing mechanism 4 comprises a slide seat 42, a second electric cylinder 43, a screw 44, a mounting block 45, and a side claw 46 , a third spring 47 and a magnet block 48, a slide groove 41 is opened inside the mounting plate 1, a slide seat 42 is slidably engaged with the inner wall of the slide groove 41, a second electric cylinder 43 is fixedly connected to the other side of the slide seat 42, a side claw 46 is fixedly connected to the movable end of the second electric cylinder 43, a screw rod 44 is threadedly connected to the middle part of the slide seat 42, one end of the screw rod 44 is rotatably connected to the middle part of the mounting block 45, multiple groups of third springs 47 are buckled between the two groups of side claws 46 in a parallel manner, multiple groups of magnet blocks 48 are respectively fixedly connected to the middle parts of multiple groups of third springs 47, and the mounting block 45 is fixedly connected to one side of the mounting plate 1, and the mounting block 45 and the slide seat 42 are located at the same height.

[0022] In this embodiment, multiple groups of magnet blocks 48 are used to attract the middle position of the front side of the power plate, and the screw 44 is rotated with the help of a tool. One end of the screw 44 rotates in the mounting block 45, and the other end rotates in the slide 42 to generate a meshing force. The component of the meshing force is applied to the slide 42, so that the protrusion of the slide 42 slides along the groove portion of the slide 41, thereby driving the second electric cylinder 43 to move horizontally, thereby driving the side claw 46 to move close to one side of the power plate, and the other side claw 46 also approaches the other side of the power plate in the same way, thereby the two groups of side claws 46 clamp the power plate, and within a certain range, the clamping of power plates of different lengths is achieved. The side clamping mechanism 2 enables the tool to clamp on the outer surface of the pole, and after the moving mechanism 3 works, the tool carries the power plate on the pole. The outer surface of the pole moves. When the power plate moves to the installation position of the pole, the movable rods of the two groups of second electric cylinders 43 are controlled to extend at the same time, and the corresponding side claws 46 are pushed at the same time. Under the clamping of the two groups of side claws 46 and the suction of multiple groups of magnet blocks 48, the middle part of the power plate is driven to fit the pole. The second electric cylinder 43 continues to extend and push the side claws 46. The side claws 46 are in a right-angle shape. The two groups of side claws 46 press the two ends of the power plate to fit the surface of the pole, and the magnet block 48 is installed on the bent and deformed third spring 47, so that the magnet block 48 always attracts the middle part of the power plate to ensure that the power plate does not fall off. After the power plate is completely fitted to the pole, the operator does not need to hold the power plate with his hands, and can fix the screws with both hands. At this time, the operation is more convenient and the installation efficiency is improved.

[0023] Embodiment 2: According to Figure 1 - Figure 4 As shown, the side clamping mechanism 2 includes a first mounting seat 21, a first side rod 22, a cross rod 23, a second side rod 24, a second mounting seat 25 and a first electric cylinder 26. The first mounting seat 21 and the second mounting seat 25 are both fixedly connected on the same side of the mounting plate 1. The first side rod 22 is fixedly connected to the second side rod 24 through the cross rod 23. The first side rod 22 is rotatably connected to the first mounting seat 21. The second side rod 24 is rotatably connected to the second mounting seat 25. The end of the second side rod 24 is rotatably connected to the end of the movable rod of the first electric cylinder 26. The first electric cylinder 26 is rotatably connected to the inside of the second mounting seat 25.

[0024] In this embodiment, by placing the tool on the surface of the pole and controlling the first electric cylinder 26 to start, the movable rod of the first electric cylinder 26 is extended, pushing one end of the second side rod 24 outward, so that the second side rod 24 moves in a fan shape around the connection point with the second mounting seat 25, and the V-shaped frame composed of the first side rod 22, the cross rod 23 and the second side rod 24 drives the moving mechanism 3 to fit the side of the pole, thereby the two groups of moving mechanisms 3 fit the pole, and when the V-shaped frame continues to be subjected to force and exerts force on the moving mechanism 3, the tool remains stationary on the outer surface of the pole.

[0025] Embodiment 3: According to Figure 1 - Figure 6 As shown, the moving mechanism 3 includes a connecting plate 31, a first concave wheel 32, a first wheel frame 33, a connecting rod 34, a middle frame 35, a motor 36, a second wheel frame 37, a second concave wheel 38, a first spring 39, a second spring 310, a driven pulley 311, a synchronous belt 312 and a driving pulley 313. The connecting plate 31 is fixedly connected to the cross bar 23, the first wheel frame 33 and the middle frame 35 are rotatably connected to the two ends of the protrusion on one side of the connecting plate 31, the first wheel frame 33 and the middle frame 35 are rotatably connected to the connecting rod 34, the first concave wheel 32 is rotatably installed in the middle of the first wheel frame 33, and the first wheel frame 3 One end of the second wheel frame 37 is connected to the other end of the center frame 35 through the second spring 310, one end of the second wheel frame 37 is rotatably connected to the middle of one end of the center frame 35, the other end of the center frame 35 is connected to the middle of the second wheel frame 37 through the first spring 39, the second concave wheel 38 is rotatably mounted on the other end of the second wheel frame 37, the driven pulley 311 is fixedly mounted on one end of the shaft of the second concave wheel 38, the driven pulley 311 is transmission-connected to the driving pulley 313 through the synchronous belt 312, the driving pulley 313 is fixedly mounted on the rotating shaft of the motor 36, and the motor 36 is fixedly mounted in the middle of the second wheel frame 37.

[0026] In this embodiment, when the two sets of moving mechanisms 3 are forced to fit against the electric pole, the concave areas of both the first cam 32 and the second cam 38 are simultaneously in contact with the arc surface of the electric pole. Under the continuous force on the C-shaped frame, the first cam 32 is subjected to an outward thrust from the electric pole, causing one side of the connecting plate 31 to bulge, and the three-dimensional frame composed of the first wheel frame 33, the connecting rod 34, and the middle frame 35 to become narrower. At the same time, the second cam 38 is also subjected to an outward thrust from the electric pole. When the frictional force between both the first cam 32 and the second cam 38 and the electric pole is greater than the gravity of the tool, the tool remains stationary on the outer surface of the electric pole. Then, the control motor 36 is started, and the motor 36 drives the driving pulley 313 to rotate. After being transmitted by the synchronous belt 312, it drives the driven pulley 311 to rotate, thereby driving the second cam 38 to rotate in the second wheel frame 37. At this time, the second cam 38 drives the first cam 32 to roll on the outer surface of the electric pole. Thus, the tool moves on the outer surface of the electric pole while carrying the electric power number plate. During the process of the three-dimensional frame becoming narrower, the second spring 310 inside it is stretched and deformed, and the first spring 39 between the three-dimensional frame and the second wheel frame 37 is also stretched and deformed. The elastic forces generated after the deformation of both exist, ensuring that the first cam 32 and the second cam 38 can roll smoothly.

[0027] Usage method and working principle of this device: When using the tool for quickly installing electric power number plates, multiple magnet blocks 48 attract the middle position on the front side of the electric power number plate. By turning the screw rod 44 of the tool, one end of the screw rod 44 rotates in the mounting block 45, and the other end rotates in the sliding seat 42 and generates a meshing force. The component force of this meshing force is applied to the sliding seat 42, causing the protrusion of the sliding seat 42 to slide along the groove of the sliding groove 41. Thereby, it drives the second electric cylinder 43 to move horizontally, and then drives the side claw 46 to move closer to one side of the electric power number plate. The other side claw 46 also approaches the other side of the electric power number plate in the same way. Thus, the two sets of side claws 46 clamp the electric power number plate. Next, place the tool on the surface of the electric pole, and at the same time, control the first electric cylinder 26 to start. The movable rod of the first electric cylinder 26 extends, pushing one end of the second side rod 24 outward, causing the second side rod 24 to perform a sector motion around the connection point with the second mounting seat 25. The C-shaped frame composed of the first side rod 22, the cross bar 23, and the second side rod 24 drives the moving mechanism 3 to fit against the side of the electric pole. Thus, the two sets of moving mechanisms 3 fit against the electric pole. At this time, the concave areas of both the first cam 32 and the second cam 38 are simultaneously in contact with the arc surface of the electric pole. Under the continuous force on the C-shaped frame, the first cam 32 is subjected to an outward thrust from the electric pole, causing one side of the connecting plate 31 to bulge, and the three-dimensional frame composed of the first wheel frame 33, the connecting rod 34, and the middle frame 35 to become narrower. At the same time, the second cam 38 is also subjected to an outward thrust from the electric pole. When the frictional force between both the first cam 32 and the second cam 38 and the electric pole is greater than the gravity of the tool, the tool remains stationary on the outer surface of the electric pole. The control motor 36 is started, and the motor 36 drives the driving pulley 313 to rotate, and after being transmitted by the synchronous belt 312, drives the driven pulley 311 to rotate, thereby driving the second concave wheel 38 to rotate in the second wheel frame 37. At this time, the second concave wheel 38 drives the first concave wheel 32 to roll on the outer surface of the pole, so that the tool carries the power number plate and moves on the outer surface of the pole; When the power plate is moved to the pole installation position, the movable rods of the two groups of second electric cylinders 43 are controlled to extend at the same time, and the corresponding side claws 46 are pushed at the same time. Under the clamping of the two groups of side claws 46 and the suction of multiple groups of magnet blocks 48, the middle part of the power plate is driven to fit the pole, and the second electric cylinder 43 continues to extend and push the side claws 46. The side claws 46 are in a right-angle shape. The two groups of side claws 46 press the two ends of the power plate to fit the surface of the pole, and the magnet block 48 is installed on the bent and deformed third spring 47, so that the magnet block 48 always attracts the middle part of the power plate to ensure that the power plate does not fall off. After the power plate is completely fitted to the pole, the operator does not need to hold the power plate with his hands, and can fix the screws with both hands, which is easy to operate.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tool for quickly installing a power plate, comprising a mounting plate (1), characterized in that: Both sides of the mounting plate (1) are fixedly connected to side clamping mechanisms (2), the other end of each set of side clamping mechanisms (2) is fixedly connected to a moving mechanism (3), and a card pressing mechanism (4) is provided on one side of the mounting plate (1), and the card pressing mechanism (4) is located above the side clamping mechanism (2); The side clamping mechanism (2) and the moving mechanism (3) form a single-sided clamping mechanism. The two sets of single-sided clamping mechanisms are used to clamp the electric pole. The moving mechanism (3) is used to drive the electric number plate to move along the electric pole to a specified position. The pressing mechanism (4) absorbs the electric number plate and makes it fit the surface of the electric pole. The card pressing mechanism (4) comprises a slide seat (42), a second electric cylinder (43), a screw rod (44), a mounting block (45), a side claw (46), a third spring (47) and a magnet block (48). A slide groove (41) is provided inside the mounting plate (1). The slide seat (42) is slidably engaged with the inner wall of the slide groove (41). The second electric cylinder (43) is fixedly connected to the other side of the slide seat (42). The side claw (46) is fixedly connected to the movable end of the second electric cylinder (43). The screw rod (44) is threadedly connected to the middle part of the slide seat (42). One end of the screw rod (44) is rotatably connected to the middle part of the mounting block (45). Multiple groups of the third springs (47) are buckled between two groups of the side claws (46) in a mutually parallel manner. Multiple groups of the magnet blocks (48) are respectively fixedly connected to the middle parts of multiple groups of the third springs (47).

2. A tool for quickly installing a power plate according to claim 1, characterized in that: The mounting block (45) is fixedly connected to one side of the mounting plate (1), and the mounting block (45) and the slide seat (42) are located at the same height.

3. A tool for quickly installing a power plate according to claim 2, characterized in that: The side clamping mechanism (2) comprises a first mounting seat (21), a first side rod (22), a cross rod (23), a second side rod (24), a second mounting seat (25) and a first electric cylinder (26); the first mounting seat (21) and the second mounting seat (25) are both fixedly connected to the same side of the mounting plate (1).

4. A tool for quickly installing a power plate according to claim 3, characterized in that: The first side rod (22) is fixedly connected to the second side rod (24) via the cross rod (23), and the first side rod (22) is rotatably connected to the first mounting seat (21).

5. A tool for quickly installing a power plate according to claim 4, characterized in that: The second side rod (24) is rotatably connected to the second mounting seat (25), and the end of the second side rod (24) is rotatably connected to the end of the movable rod of the first electric cylinder (26).

6. A tool for quickly installing a power plate according to claim 5, characterized in that: The first electric cylinder (26) is rotatably connected to the interior of the second mounting seat (25).

7. A tool for quickly installing a power plate according to claim 6, characterized in that: The moving mechanism (3) comprises a connecting plate (31), a first cam wheel (32), a first wheel frame (33), a connecting rod (34), a center frame (35), a motor (36), a second wheel frame (37), a second cam wheel (38), a first spring (39), a second spring (310), a driven pulley (311), a synchronous belt (312) and a driving pulley (313); the connecting plate (31) is fixedly connected to the cross bar (23).

8. A tool for quickly installing a power number plate according to claim 7, characterized in that: The first wheel frame (33) and the middle frame (35) are respectively rotatably connected to two ends of a protrusion on one side of the connecting plate (31), and the first wheel frame (33) and the middle frame (35) are respectively rotatably connected to the connecting rod (34).

9. A tool for quickly installing a power number plate according to claim 8, characterized in that: The first concave wheel (32) is rotatably mounted in the middle of the first wheel frame (33); one end of the first wheel frame (33) is connected to the other end of the middle frame (35) via the second spring (310); one end of the second wheel frame (37) is rotatably connected to the middle of one end of the middle frame (35); and the other end of the middle frame (35) is connected to the middle of the second wheel frame (37) via the first spring (39).

10. A tool for quickly installing a power number plate according to claim 9, characterized in that: The second cam (38) is rotatably mounted on the other end of the second wheel frame (37), the driven pulley (311) is fixedly mounted on one end of the shaft of the second cam (38), the driven pulley (311) is transmission-connected to the driving pulley (313) via the synchronous belt (312), the driving pulley (313) is fixedly mounted on the rotating shaft of the motor (36), and the motor (36) is fixedly mounted in the middle of the second wheel frame (37).

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