Low altitude security spectrum drone detector

Abstract

The utility model provides a kind of low altitude security spectrum unmanned aerial vehicle detector, including substrate, the top of the substrate is fixedly installed with box, the bottom of the box is fixedly installed with positioning mechanism, the moving end top of the positioning mechanism is fixedly installed with buffer clamp group, the top of the positioning mechanism is fixedly installed with detector body by buffer clamp group clamping installation, the back upper end of the box is fixedly installed with hinged part, the main buffer spring of the buffer clamp group, side buffer spring and damper of the device adopt synergistic effect, can effectively absorb and slow down the vibration generated in the jolt of transportation or use, avoid detector body damage, make up the deficiency of prior art without buffer structure, ball on side clamping plate and bearing plate, not only reduce clamping friction damage, also auxiliary adjustment detector position, enhance clamping stability, provide reliable protection for detector body, satisfy the demand of actual application to stable protection.

Description

Technical Field

[0001] This utility model relates to the field of detector technology, and in particular to a low-altitude security spectrum drone detector. Background Technology

[0002] Unmanned aerial vehicles (UAVs), or drones, are operated by radio remote control equipment and onboard program control devices, or autonomously by onboard computers. Compared to manned aircraft, UAVs can undertake "dull, dirty, or dangerous" tasks, and their applications are wide-ranging and constantly expanding. In the military field, UAVs serve as reconnaissance aircraft and target drones, performing tasks such as reconnaissance, intelligence gathering, and simulating enemy targets. In the civilian field, UAVs are used in aerial photography, agricultural plant protection, express delivery, disaster relief, power line inspection, and many other industries, greatly extending their value and driving the continuous development of UAV technology.

[0003] With the widespread application of drones, the demand for drone monitoring and control is becoming increasingly urgent, and drone detectors have become important equipment. However, existing drone detectors have the problem of simple installation structure, which makes installation and operation inconvenient, increases the difficulty of use for staff, and cannot meet the needs of efficient installation and rapid deployment.

[0004] In the existing technology, the low-altitude security spectrum drone detector disclosed in Chinese patent "CN212829107U" has achieved a certain degree of fixation and protection through various structural designs, but it still has obvious defects. First, it lacks a buffer protection structure as a whole. During transportation, it cannot effectively reduce the impact of vibration on the detector when faced with bumps and swaying, which can easily cause damage to internal components. Second, when clamping and installing, it is difficult to clamp the front and back sides of the detector quickly and stably, and it is impossible to achieve rapid centering and positioning, which affects the installation efficiency and stability. It can be seen that the existing drone detector still needs to be optimized and improved in terms of structural design to meet the higher requirements of convenient installation and reliable protection in practical applications. Utility Model Content

[0005] To address the aforementioned problems, this invention proposes a low-altitude security spectrum drone detector to more accurately resolve the problems described above.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model proposes a low-altitude security spectrum drone detector, including a base plate, a housing fixedly installed on the top of the base plate, a positioning mechanism fixedly installed on the bottom of the housing, a buffer clamp group fixedly installed on the top of the moving end of the positioning mechanism, a detector body clamped and installed on the top of the positioning mechanism through the buffer clamp group, a hinge member fixedly installed on the upper back of the housing, and a top cover connected to the upper back of the housing through the hinge member;

[0008] The positioning mechanism includes a cross rail frame, an adjustment component at the rear end of the cross rail frame, a transmission component fixedly installed in the middle of the cross rail frame, and lead screws rotatably connected to each end of the interior of the cross rail frame. The inner end of the lead screw is connected to the outer side of the transmission component. The front side of the adjustment component is fixedly connected to the rear end of a lead screw. A slider is threadedly connected to the outer surface of the lead screw, and a buffer clamp is fixedly installed on the top of the slider.

[0009] Furthermore, a fixing plate is hinged to the middle of the front end of the top cover, and a mounting screw is threaded to the lower end of the fixing plate.

[0010] Furthermore, the mounting screw is a hand-tightening screw, and a mounting hole is provided at the upper front end of the housing, with the end of the mounting screw inserted into the mounting hole.

[0011] Furthermore, the transmission assembly includes a square groove, which is opened in the middle of the inner side of the cross rail frame. A driven bevel gear is rotatably connected to the bottom of the square groove, and a driving bevel gear is rotatably connected to each surface of the square groove. The driven bevel gear and the driving bevel gear are meshed together, and the outer side of the driving bevel gear is connected to the inner end of the lead screw.

[0012] Furthermore, the adjustment assembly includes a fixed plate, which is fixedly installed on the lower back of the housing. An adjustment plate is rotatably connected to the back of the fixed plate. A locking screw is threadedly connected to one side of the adjustment plate. The end of the locking screw passes through the adjustment plate. The inner side of the adjustment plate is fixedly connected to the outer end of a lead screw. Limiting holes are evenly spaced and arranged in a ring on the back of the fixed plate. The end of the locking screw is inserted into the limiting holes.

[0013] Furthermore, the locking screw is a hand-tightening screw, and an adjusting handle is fixedly connected to the outer side of the adjusting plate.

[0014] Furthermore, the buffer clamp assembly includes a receiving plate, which is fixedly installed on the top of the slider. A side frame is fixedly installed on the outer side of the top of the receiving plate. Side buffer springs are fixedly installed on the inner side of the side frame in a linear arrangement at equal intervals. A main buffer spring is fixedly installed at the four corners of the top of the receiving plate. A side clamp is fixedly installed on the inner side of the side buffer spring. A bearing plate is fixedly connected to the top of the main buffer spring. Ball bearings are rotatably connected at equal intervals on the top of the bearing plate and the inner side of the side clamp. A damper is fixedly connected to the bottom of the bearing plate and the outer side of the side clamp. The main buffer spring and the side buffer spring are both sleeved on the outer side of the damper.

[0015] The beneficial effects of this utility model are:

[0016] 1. This device uses the adjustment component of the positioning mechanism and the transmission component to adjust the position of multiple buffer clamps simultaneously by rotating the adjustment plate, so as to realize the rapid centering and clamping positioning of detector bodies of different sizes. This changes the complicated multi-face clamping operation method of the existing technology and greatly improves the installation efficiency. At the same time, the design of the hand-tightening locking screw and the installation screw simplifies the installation and disassembly process, reduces the operation difficulty of the staff, and makes the equipment installation more convenient and efficient.

[0017] 2. In terms of protection, the main buffer spring, side buffer spring and damper of the buffer clamp group work together to effectively absorb and reduce the vibration caused by bumps and swaying during transportation or use, avoid damage to the detector body, make up for the lack of buffer structure in the existing technology. The ball bearings on the side clamp and the bearing plate not only reduce clamping friction damage, but also help adjust the position of the detector, enhance clamping stability, provide reliable protection for the detector body, and meet the needs of practical applications for stable protection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0020] Figure 3 This is a top view of the structure of the top cover of this utility model in the open state;

[0021] Figure 4 This is a schematic diagram of the internal structure of the box body of this utility model;

[0022] Figure 5 This is a schematic diagram of the positioning mechanism and buffer clamp assembly of this utility model;

[0023] Figure 6 This is a schematic diagram of the buffer clip assembly structure of this utility model.

[0024] In the diagram: 1. Base plate; 2. Housing; 3. Positioning mechanism; 31. Cross rail frame; 32. Adjustment assembly; 321. Fixed plate; 322. Adjustment plate; 323. Locking screw; 324. Limiting hole; 325. Adjustment handle; 33. Transmission assembly; 331. Square groove; 332. Driven bevel gear; 333. Driving bevel gear; 34. Lead screw; 35. Slider; 4. Detector body; 5. Hinge; 6. Buffer clamp assembly; 61. Support plate; 62. Side frame; 63. Side buffer spring; 64. Main buffer spring; 65. Side clamp plate; 66. Bearing plate; 67. Ball bearing; 68. Damper; 7. Top cover; 8. Fixed plate; 9. Mounting screw; 10. Mounting hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] A low-altitude security spectrum drone detector includes a base plate 1. A housing 2 is fixedly installed on the top of the base plate 1. A positioning mechanism 3 is fixedly installed on the bottom of the housing 2. A buffer clamp group 6 is fixedly installed on the top of the moving end of the positioning mechanism 3. A detector body 4 is clamped and installed on the top of the positioning mechanism 3 through the buffer clamp group 6. A hinge 5 is fixedly installed on the upper back of the housing 2. A top cover 7 is connected and installed on the upper back of the housing 2 through the hinge 5.

[0028] The positioning mechanism 3 includes a cross rail frame 31, an adjustment component 32 at the rear end of the cross rail frame 31, a transmission component 33 fixedly installed in the middle of the cross rail frame 31, and lead screws 34 rotatably connected to each end of the interior of the cross rail frame 31. The inner end of the lead screw 34 is connected to the outer side of the transmission component 33. The front side of the adjustment component 32 is fixedly connected to the rear end of a lead screw 34. A slider 35 is threadedly connected to the outer surface of the lead screw 34, and a buffer clamp 6 is fixedly installed on the top of the slider 35.

[0029] Combination Figures 1-6As shown, a fixing plate 8 is hinged to the middle of the front end of the top cover 7. The lower end of the fixing plate 8 is threaded with a mounting screw 9, which is a hand-tightening screw. A mounting hole 10 is provided at the upper end of the front of the housing 2. The end of the mounting screw 9 is inserted into the mounting hole 10. The transmission component 33 includes a square groove 331, which is located in the middle of the inner side of the cross rail frame 31. A driven bevel gear 332 is rotatably connected to the bottom of the square groove 331. A driving bevel gear 333 is rotatably connected to each surface of the square groove 331. The driven bevel gear 332 and the driving bevel gear 333 are meshed. The outer side of the driving bevel gear 333 is connected to the inner end of the lead screw 34.

[0030] In the technical solution described in the above-described embodiments of this application, during the operation of the low-altitude security spectrum UAV detector, the detector is first fixed to the target position via the base plate 1. When the detector body 4 needs to be installed, the adjustment assembly 32 is operated, and the components in the adjustment assembly 32 are rotated, causing the lead screw 34 connected to it to rotate. Since the lead screw 34 and the slider 35 are threadedly engaged, the rotation of the lead screw 34 drives the slider 35 to move axially along the lead screw 34 within the track of the cross rail frame 31. Simultaneously, the driving bevel gear 333 connected to the inner end of the lead screw 34 rotates accordingly. Through the meshing transmission between the driving bevel gear 333 and the driven bevel gear 332, the remaining lead screws 34 within the cross rail frame 31 rotate synchronously, so that the sliders 35 at each end can move synchronously. To adjust the position of the buffer clamp 6, after the slider 35 moves to the appropriate position, the adjusting component 32 is fixed by the locking component in the adjusting component 32, thereby locking the position of the lead screw 34 and the slider 35. Then, the detector body 4 is placed on the support plate 66 of the buffer clamp 6. The weight of the detector body 4 causes the spring in the buffer clamp 6 to compress. The side clamp 65 moves towards the side of the detector body 4 under the action of the spring, thereby clamping the side of the detector body 4. Finally, the top cover 7 is rotated by the hinge 5 so that the top cover 7 covers the box 2. The hand-tightening mounting screw 9 at the lower end of the fixing plate 8 is inserted into the mounting hole 10 at the upper end of the front of the box 2 and tightened to achieve a fixed connection between the top cover 7 and the box 2, thus completing the installation of the detector body 4.

[0031] Example 2

[0032] Combination Figures 2-6As shown, the adjustment assembly 32 includes a fixed plate 321, which is fixedly installed on the lower back of the housing 2. An adjustment plate 322 is rotatably connected to the back of the fixed plate 321. A locking screw 323 is threadedly connected to one side of the adjustment plate 322, and the end of the locking screw 323 passes through the adjustment plate 322. The inner side of the adjustment plate 322 is fixedly connected to the outer end of a lead screw 34. Limiting holes 324 are evenly spaced and arranged in a ring on the back of the fixed plate 321. The end of the locking screw 323 is inserted into the limiting hole 324. The locking screw 323 is a hand-tightening screw. An adjustment handle 325 is fixedly connected to the outer side of the adjustment plate 322. The buffer clamp 6 includes a receiving... Plate 61, the receiving plate 61 is fixedly installed on the top of slider 35, a side frame 62 is fixedly installed on the outer side of the top of the receiving plate 61, side buffer springs 63 are fixedly installed on the inner side of the side frame 62 in a linear arrangement at equal intervals, a main buffer spring 64 is fixedly installed at the four corners of the top of the receiving plate 61, a side clamping plate 65 is fixedly installed on the inner side of the side buffer spring 63, a bearing plate 66 is fixedly connected to the top of the main buffer spring 64, a ball bearing 67 is rotatably connected at equal intervals on the top of the bearing plate 66 and the inner side of the side clamping plate 65, a damper 68 is fixedly connected to the bottom of the bearing plate 66 and the outer side of the side clamping plate 65, and the main buffer spring 64 and the side buffer spring 63 are both sleeved on the outer side of the damper 68.

[0033] In the technical solution described in the above-described embodiments of this application, when the detector body 4 is installed in the low-altitude security spectrum UAV detector, the adjustment component 32 and the buffer clamp group 6 work together. The operator holds the adjustment handle 325 on the outside of the adjustment plate 322 and rotates the adjustment plate 322. The inner side of the adjustment plate 322 is fixed to the outer end of the lead screw 34, causing the lead screw 34 to rotate. Because the lead screw 34 is threadedly connected to the slider 35, the slider 35 moves along the axial direction of the lead screw 34 in the track of the cross rail frame 31. At the same time, the driving bevel gear 333 connected to the inner end of the lead screw 34 rotates, and through the driven bevel gear 332, the other lead screws 34 in the cross rail frame 31 rotate synchronously, realizing the linkage of multiple sliders 35, adjusting the position of the buffer clamp group 6. When the buffer clamp group 6 moves to the appropriate position... After positioning, tighten the hand-tightening locking screw 323 on one side of the adjusting plate 322, so that its end is inserted into the annularly arranged limiting holes 324 on the back of the fixing plate 321 to fix the adjusting plate 322, thereby locking the position of the lead screw 34 and the slider 35. Then, place the detector body 4. Its weight compresses the main buffer spring 64 at the four corners of the top of the supporting plate 61 and the side buffer spring 63 on the inner side of the side frame 62. The side clamping plate 65 clamps the side of the detector under the action of the side buffer spring 63. The bearing plate 66 and the ball bearing 67 on the inner side of the side clamping plate 65 reduce friction and assist in adjusting the position. The dampers 68 at the bottom of the bearing plate 66 and the outer side of the side clamping plate 65 suppress the vibration of the main and side buffer springs 63, reduce the impact of vibration on the detector body 4, and complete the installation and protection.

[0034] During the application of this device, the size of its base plate 1 can be customized according to actual installation requirements, with a thickness typically of 5-8mm, and high-strength aluminum alloy material is used to enhance stability; the length, width, and height of the housing 2 can be set to 400-600mm × 300-500mm × 200-400mm, with a wall thickness of 3-5mm, and stainless steel material is used to improve protection; the cross rail frame 31 has a rail width of 15-25mm, the lead screw 34 has a diameter of 8-12mm, and a pitch of 3-5mm; the adjusting plate 322 has a diameter of 100-150mm, the fixing plate 321 has a diameter of 120-180mm, and the limiting hole 324 has a diameter of 5-8mm and a spacing of 15-25mm; the elastic coefficients of the main buffer spring 64 and the side buffer spring 63 in the buffer clamp assembly 6 are set according to the weight of the detector, the free length of the main buffer spring 64 is 50-80mm, and the free length of the side buffer spring 63 is... The damper has a travel of 10-20mm and a height of 30-50mm. During the application of this device, a controller can be installed inside the enclosure 2. The controller can be an STM32F407ZGT6 microcontroller, which can be installed on a dedicated circuit board on the back of the inner side of enclosure 2 and fixed with a bracket. The wireless transmission module uses SIM800C, supporting GSM network communication for easy data transmission. The power supply module uses LM2596S-ADJ, converting the input voltage to the voltage required by each electronic component. The power supply method for the electronic components is as follows: external 220V AC power is converted to 12V DC power via a power adapter, and then step-down modules such as LM2596S-ADJ are used to power the controller, wireless transmission module, etc. Electrical connections between components are achieved through wires and ribbon cables. The modular connection method facilitates maintenance and repair.

[0035] The working principle and advantages of this utility model are as follows: When installing and using the low-altitude security spectrum drone detector, the detector is first fixed to the target position by the base plate 1. When it is necessary to install the detector body 4, the adjustment component 32 is operated, and the adjustment plate 322 is adjusted by adjusting the handle 325. The adjustment plate 322 drives the lead screw 34 connected to it to rotate. Since the lead screw 34 is threadedly connected to the slider 35, the rotation of the lead screw 34 causes the slider 35 to move axially along the lead screw 34 in the track of the cross rail frame 31. At the same time, the driving bevel gear 333 connected to the inner end of the lead screw 34 rotates, and the driven bevel gear meshes with it. 332 drives the remaining lead screws 34 in the cross rail frame 31 to rotate synchronously, so that the sliders 35 at each end can move synchronously, realizing the adjustment of the position of the buffer clamp 6. During this period, the detector body 4 is placed on the support plate 66. The weight of the detector body 4 compresses the main buffer spring 64 and the side buffer spring 63. The side clamp 65 moves towards the side of the detector body 4 under the action of the side buffer spring 63. Through the elastic force of the side buffer spring 63 and the assistance of the ball bearings 67 on the side clamp 65, the side of the detector body 4 is clamped. The ball bearings 67 can reduce friction when receiving impact, and promote the side buffer The buffering force of spring 63 and main buffer spring 64 can better act on the detector body 4. The main buffer spring 64 and side buffer spring 63 together can improve the buffering protection effect. At the same time, the damper 68 at the bottom of the bearing plate 66 suppresses the vibration of the main buffer spring 64, and the damper 68 on the outside of the side clamp plate 65 suppresses the vibration of the side buffer spring 63, reducing the impact of vibration on the detector body 4 and further improving its overall buffering effect. When it is necessary to close the box 2, the top cover 7 is rotated through the hinge 5 to cover the box 2, and the hand-tightening mounting screw 9 at the lower end of the fixing plate 8 is inserted into the box 2. Tighten the mounting screw 9 in the mounting hole 10 at the top of the face to fix the top cover 7 to the housing 2, thus completing the installation and protection of the detector body 4. When the slider 35 moves to the appropriate position, it can maintain the buffer protection effect while quickly clamping and positioning the front and back sides of the detector body 4, so that the device can be quickly clamped and installed. After clamping and installation, simply tighten the locking screw 323 so that its end is inserted into the limiting hole 324 on the back of the fixing plate 321 to fix the adjusting plate 322, thereby locking the position of the screw 34 and the slider 35 for stable installation and fixation.

[0036] Compared to existing technologies, this technical solution offers significant improvements in installation convenience and protective performance. In terms of installation, the adjusting component 32 and transmission component 33 of the positioning mechanism 3 work together to simultaneously adjust the positions of multiple buffer clamps 6 by rotating the adjusting plate 322, achieving rapid centering and clamping positioning of detector bodies 4 of different sizes. This eliminates the need for complex clamping operations on each surface of the detector as required by existing technologies, greatly improving installation efficiency. The hand-tightening locking screw 323 and mounting screw 9 facilitate quick installation and disassembly by operators, reducing operational difficulty. Regarding protective performance, the main buffer spring 64 and side buffer spring 63 in the buffer clamp 6, in conjunction with the damper 68, effectively absorb and mitigate vibrations during transportation or use, preventing damage to the detector body 4 due to vibration and overcoming the lack of buffer protection in existing technologies. To address structural defects, the design of the ball bearings 67 on the side clamping plate 65 and the bearing plate 66 reduces frictional damage to the surface of the detector body 4 during clamping. Furthermore, the ball bearings 67 assist in adjusting the position of the detector body 4, maximizing the use of the main buffer spring 64 and the side buffer spring 63 for cushioning, thus improving the cushioning effect. Through the coordinated work of all components, the overall structure provides reliable installation and protection for the detector body 4, meeting the practical application requirements for convenient installation and stable protection of UAV detectors. This application does not involve improvements to the electronic components of the device; therefore, the working principles of each electronic component are not described in detail here. The electronic components used in this application are all conventional electronic components used in the prior art, and they all belong to conventional technical means in the prior art, which are very mature in application; therefore, they will not be elaborated upon here.

[0037] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A low-altitude security spectrum drone detector, characterized in that, Includes a base plate (1), a housing (2) is fixedly installed on the top of the base plate (1), a positioning mechanism (3) is fixedly installed on the bottom of the housing (2), a buffer clamp group (6) is fixedly installed on the top of the moving end of the positioning mechanism (3), a detector body (4) is clamped and installed on the top of the positioning mechanism (3) through the buffer clamp group (6), a hinge (5) is fixedly installed on the upper back of the housing (2), and a top cover (7) is connected and installed on the upper back of the housing (2) through the hinge (5); The positioning mechanism (3) includes a cross rail frame (31), an adjustment component (32) is provided at the rear end of the cross rail frame (31), a transmission component (33) is fixedly installed in the middle of the cross rail frame (31), and each end of the cross rail frame (31) is rotatably connected to a lead screw (34). The inner end of the lead screw (34) is connected to the outer side of the transmission component (33). The front side of the adjustment component (32) is fixedly connected to the rear end of a lead screw (34). A slider (35) is threadedly connected to the outer surface of the lead screw (34), and a buffer clamp (6) is fixedly installed on the top of the slider (35).

2. The low-altitude security spectrum drone detector according to claim 1, characterized in that, A fixing plate (8) is hinged to the middle of the front end of the top cover (7), and a mounting screw (9) is threaded to the lower end of the fixing plate (8).

3. A low-altitude security spectrum drone detector according to claim 2, characterized in that, The mounting screw (9) is a hand-tightening screw. The upper front end of the housing (2) is provided with a mounting hole (10). The end of the mounting screw (9) is inserted into the mounting hole (10).

4. A low-altitude security spectrum drone detector according to claim 1, characterized in that, The transmission assembly (33) includes a square groove (331) which is located in the middle of the inner side of the cross rail frame (31). A driven bevel gear (332) is rotatably connected to the bottom of the square groove (331). A driving bevel gear (333) is rotatably connected to each surface of the square groove (331). The driven bevel gear (332) and the driving bevel gear (333) are meshed. The outer side of the driving bevel gear (333) is connected to the inner end of the lead screw (34).

5. A low-altitude security spectrum drone detector according to claim 1, characterized in that, The adjustment assembly (32) includes a fixed plate (321), which is fixedly installed on the lower back of the housing (2). An adjustment plate (322) is rotatably connected to the back of the fixed plate (321). A locking screw (323) is threadedly connected to one side of the adjustment plate (322). The end of the locking screw (323) passes through the adjustment plate (322). The inner side of the adjustment plate (322) is fixedly connected to the outer end of a lead screw (34). Limiting holes (324) are arranged in a ring at equal intervals on the back of the fixed plate (321). The end of the locking screw (323) is inserted into the limiting hole (324).

6. A low-altitude security spectrum drone detector according to claim 5, characterized in that, The locking screw (323) is a hand-tight screw, and an adjusting handle (325) is fixedly connected to the outside of the adjusting plate (322).

7. A low-altitude security spectrum drone detector according to claim 1, characterized in that, The buffer clamp assembly (6) includes a receiving plate (61), which is fixedly installed on the top of the slider (35). A side frame (62) is fixedly installed on the outer side of the top of the receiving plate (61). Side buffer springs (63) are fixedly installed on the inner side of the side frame (62) in a linear arrangement at equal intervals. A main buffer spring (64) is fixedly installed at the four corners of the top of the receiving plate (61). A side clamp plate (65) is fixedly installed on the inner side of the side buffer spring (63). A bearing plate (66) is fixedly connected to the top of the main buffer spring (64). Ball bearings (67) are rotatably connected at equal intervals on the top of the bearing plate (66) and the inner side of the side clamp plate (65). A damper (68) is fixedly connected to the bottom of the bearing plate (66) and the outer side of the side clamp plate (65). The main buffer spring (64) and the side buffer spring (63) are both sleeved on the outer side of the damper (68).

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