Flange cutting device with burr removing function

Abstract

The invention discloses a flange cutting device with a burr removing function, and relates to the technical field of flange machining, the flange cutting device comprises a flange cutting device main body, a machining base is arranged at the bottom of the flange cutting device main body, and a flange blank conveying and clamping mechanism is arranged above the machining base; a cutting and polishing combined mechanism is arranged at the front end of the flange blank conveying and clamping mechanism; the flange blank conveying and clamping mechanism comprises a flange blank conveying unit and a cutting and bearing unit. The water tank is arranged on the upper surface of the cutting water tank, the V-shaped bearing long support and the V-shaped bearing short support play a role in bearing a flange blank at a cutting position, and a gap formed between the V-shaped bearing long support and the V-shaped bearing short support is a cutting groove; the flange blank stabilizing baffle has continuous pressing force on the extrusion folding pad, so that the pressing ring hoops the flange blank, shaking is avoided during cutting, meanwhile, the cut flange blank is fixed, and burr grinding of a cut surface is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of flange processing, and in particular to a flange cutting device with a burr removal function. Background Art

[0002] Flange is also called flange flange or flange. Flange is a part that connects shafts to each other and is used for connecting pipe ends. It is also used as flange on equipment inlet and outlet for connecting two equipments. Flange blank is a long cylindrical blank before processing. Before processing, the cylindrical blank needs to be cut on a sawing machine. Since the blank is long and large, the cutting process is inconvenient and prone to warping, which seriously affects the cutting accuracy of the sawing machine. In addition, burrs are easily generated on the cut surface after cutting, and grinding is required in the later processing process, which reduces the efficiency of flange processing. Therefore, the present invention proposes a flange cutting device with burr removal function.

[0003] In the prior art, a Chinese patent document with publication number CN116079148A and publication date May 9, 2023 is proposed to solve the above-mentioned technical problems. The technical solution disclosed in the patent document is as follows: A blank cutting device for flange processing, relating to the field of blank cutting technology, comprises a frame, a blank collection box is fixedly installed on one end of the bottom plate of the frame, and also comprises a lower support mechanism, the lower support mechanism is fixedly installed on the top plate of the frame, and is used to support and convey the long flange blank, the lower support mechanism comprises a fixed-length movable part, the fixed-length movable part is installed on the lower support frame, the clamping and rotating mechanism is fixedly installed on the top plate of the frame, and is located on the front side of the lower support mechanism, the clamping and rotating mechanism comprises a clamping and rotating part and a clamping and fixing part, which are used to clamp and fix the long flange blank and make the long flange blank rotate stably.

[0004] In order to solve the problem that the blank is too long and large, which makes the cutting process inconvenient and easy to warp, seriously affecting the cutting accuracy of the sawing machine, the existing technology adopts the arrangement of a lower support mechanism and an upper support mechanism, and uses a screw drive to change the position of the conveying roller and the support roller, and supports the conveying flange long blank in the upper and lower positions. The material can be processed in a horizontal and stable manner to ensure the long flange blank, but the burrs after cutting cannot be processed, which will lead to inconvenience in flange processing in the later stage. Summary of the invention

[0005] The present invention provides a flange cutting device with a burr removal function to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A flange cutting device with a burr removal function comprises a flange cutting device body, a processing base is arranged at the bottom of the flange cutting device body, a flange blank conveying and clamping mechanism is arranged above the processing base, and a cutting and grinding combination mechanism is arranged at the front end of the flange blank conveying and clamping mechanism; the flange blank conveying and clamping mechanism comprises a flange blank conveying unit and a cutting support unit, the flange blank conveying unit is arranged at the rear end of the processing base, and the cutting support unit is arranged at the front end of the processing base; the cutting and grinding combination mechanism comprises a movable gantry unit and a cutting and grinding unit, the movable gantry unit is arranged on both sides of the cutting support unit, and the cutting and grinding unit is arranged above the movable gantry unit.

[0007] A further improvement of the technical solution of the present invention is that the flange blank conveying unit includes a threaded rod rotatably mounted on one side of the processing base, a limiting rod is provided on one side of the threaded rod, and both ends of the limiting rod are fixedly connected to the other side of the processing base.

[0008] By adopting the above technical solution, a driving motor is arranged at one end of the threaded rod.

[0009] A further improvement of the technical solution of the present invention is that the flange blank conveying unit also includes a flange blank tail fixing block, connecting rods are fixedly installed on both sides of the flange blank tail fixing block, an inner wall on one side of the connecting rod is threadedly connected to the outer surface of threaded rod one, and an inner wall on the other side of the connecting rod is slidably connected to the outer surface of the limit rod.

[0010] By adopting the above technical solution, the connecting rod plays the role of connecting the flange blank tail fixing block so that the flange blank tail fixing block slides on the threaded rod 1 and the flange blank tail fixing block.

[0011] A further improvement of the technical solution of the present invention is that a clamping tripod is symmetrically and slidably mounted on the inner side wall of the flange blank tail fixing block, and a limit spring is fixedly mounted between the inner surface of the clamping tripod and the outer surface of the flange blank tail fixing block.

[0012] By adopting the above technical solution, the clamping tripod is a triangular block, and the clamping tripod is pressed against the surface of the flange blank under the elastic action of the limit spring, thereby minimizing the contact area and increasing the pressure between the clamping tripod and the flange blank to fix the flange blank.

[0013] A further improvement of the technical solution of the present invention is that the cutting support unit includes a cutting water trough fixedly installed on the upper surface of the processing base, and a V-shaped long bearing support and a V-shaped short bearing support are fixedly installed on the upper surface of the cutting water trough.

[0014] By adopting the above technical solution, a water trough is arranged on the upper surface of the cutting water trough, and a drainage pipe is installed at the front end of the cutting water trough.

[0015] A further improvement of the technical solution of the present invention is that a cutting groove is arranged between the V-shaped long load-bearing support and the V-shaped short load-bearing support, a flange blank stabilizing baffle is fixedly installed on the upper surface of the V-shaped long load-bearing support and the V-shaped short load-bearing support, a pressing ring is hingedly installed on the inner side wall of the flange blank stabilizing baffle, and an extrusion folding pad is fixedly installed between the outer surface of the pressing ring and the inner surface of the flange blank stabilizing baffle.

[0016] By adopting the above technical scheme, the basic structure of the V-shaped long support and the V-shaped short support is the same to support the flange blank, and the flange blank stabilizing baffle has a continuous pressing force on the extrusion folding pad so that the pressing ring tightens the flange blank.

[0017] A further improvement of the technical solution of the present invention is that the mobile gantry unit includes a gantry slidably mounted on the front upper surface of the processing base, a rack is arranged below the gantry, and the lower surface of the rack is fixedly connected to the front upper surface of the processing base.

[0018] By adopting the above technical solution, the rack has a limiting effect on the movement of the gantry, and a sliding rod for limiting the bottom of the gantry is provided on one side of the processing base.

[0019] A further improvement of the technical solution of the present invention is that a driving gear and a driven gear are rotatably mounted on the bottom outer surface of the gantry, the driven gear and the driving gear are meshed with each other, and the lower surface of the driven gear and the upper surface of the rack are meshed with each other.

[0020] By adopting the above technical solution, the driving gear is driven by a motor installed on the side wall of the gantry, and the rotation of the driving gear drives the driven gear to rotate.

[0021] A further improvement of the technical solution of the present invention is that the cutting and grinding unit includes two threaded rods fixedly installed between the inner side walls above the gantry, a movable slide rail is arranged in the middle of the two threaded rods, and both ends of the movable slide rail are respectively rotatably connected to the side walls of the gantry.

[0022] By adopting the above technical solution, the second threaded rod is driven to rotate by a motor installed above the side wall of the gantry, and the second threaded rod serves to limit the movement of the mobile platform.

[0023] A further improvement of the technical solution of the present invention is that the cutting and grinding unit also includes a mobile platform slidably installed between two threaded rods, the inner wall of the mobile platform is threadedly connected to the outer surface of the movable slide rail, a high-pressure water jet cutting equipment assembly is fixedly installed on the front surface of the mobile platform, a grinding equipment mounting frame is fixedly installed on the rear surface of the mobile platform, a telescopic rod is fixedly installed above the grinding equipment mounting frame, and a grinding equipment assembly is fixedly installed on the output end of the telescopic rod.

[0024] By adopting the above technical solution, rollers matching the threaded rods are respectively installed at the upper and lower ends of the mobile platform, and the grinding equipment assembly includes a mounting frame, a driving motor, a rotating shaft, a grinding roller and other accessories.

[0025] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art: 1. The present invention provides a flange cutting device with a burr removal function. The threaded rod is driven to rotate by a motor installed on the side of a processing base. The limit rod has a limiting effect on the movement of a fixing block at the tail of the flange blank. The tail end of the flange blank is passed through the center clamping tripod of the fixing block at the tail of the flange blank. The clamping tripod is pressed against the surface of the flange blank under the elastic action of a limiting spring. The clamping tripod is a triangular block, which minimizes the contact area and increases the pressure between the clamping tripod and the flange blank to fix the flange blank. The threaded rod is rotated so that the connecting rod can move the fixing block at the tail of the flange blank while clamping the flange blank under the limiting cooperation of the limit rod, thereby realizing automatic cutting and loading.

[0026] 2. The present invention provides a flange cutting device with a burr removal function. A water trough is arranged on the upper surface of the cutting trough. The V-shaped long load-bearing support and the V-shaped short load-bearing support serve to support the flange blank at the cutting position. The gap arranged between the V-shaped long load-bearing support and the V-shaped short load-bearing support is a cutting groove. The flange blank stabilizing baffle has a continuous pressing force on the extrusion folding pad so that the pressing ring tightens the flange blank to avoid shaking during cutting. At the same time, the cut flange blank is fixed to facilitate the grinding of burrs on the cut surface.

[0027] 3. The present invention provides a flange cutting device with a burr removal function. The driving gear is driven to rotate by a motor installed on the side wall of the gantry, and meshes with the driven gear to drive the driven gear to rotate. The driven gear moves the gantry forward and backward with the cooperation of the rack, and switches between the cutting and grinding processing procedures, thereby improving the practicability of the device.

[0028] 4. The present invention provides a flange cutting device with a burr removal function. The movable slide rail is driven by a motor installed above the side wall of the gantry. The movable platform moves left and right under the limit cooperation of the threaded rod 2 to meet the processing requirements of cutting and grinding. The pulleys arranged at the upper and lower ends of the movable platform reduce the sliding friction with the threaded rod 2. The high-pressure water jet cutting equipment assembly installed on the front side of the movable platform uses a high-pressure water jet to cut the flange blank. The telescopic rod on the grinding equipment mounting frame installed on the rear side of the movable platform descends so that the motor installed on the grinding equipment assembly and the grinding roller can grind the burrs on the cut section, thereby improving the efficiency of flange processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure side of the present invention; Figure 3 It is a schematic diagram of the front structure of the present invention; Figure 4 It is a top view schematic diagram of the structural processing base of the present invention; Figure 5 It is a schematic diagram of a fixing block at the tail of a structural flange blank of the present invention; Figure 6 It is a schematic diagram of a V-shaped load-bearing short bracket of the present invention; Figure 7 It is a side schematic diagram of the structural gantry of the present invention; Figure 8 It is a schematic diagram of the installation of the structural mobile platform of the present invention.

[0030] In the figure: 1. Flange cutting device body; 11. Processing base; 2. Flange blank conveying and clamping mechanism; 21. Threaded rod one; 211. Limit rod; 22. Flange blank tail fixing block; 221. Clamping tripod; 222. Limit spring; 223. Connecting rod; 23. Cutting water tank; 24. V-shaped load-bearing long support; 25. V-shaped load-bearing short support; 26. Flange blank body stabilizing baffle; 261. Extrusion folding pad; 262. Pressing ring; 3. Cutting and grinding combination mechanism; 31. Gantry; 32. Rack; 33. Driving gear; 331. Driven gear; 34. Threaded rod two; 35. Moving slide rail; 36. Moving platform; 37. High-pressure water jet cutting equipment assembly; 38. Grinding equipment mounting frame; 39. Telescopic rod; 391. Grinding equipment assembly. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with embodiments: Example

[0032] like Figure 1-8As shown, the present invention provides a flange cutting device with a burr removal function, including a flange cutting device body 1, a processing base 11 is arranged at the bottom of the flange cutting device body 1, a flange blank conveying and clamping mechanism 2 is arranged above the processing base 11, and a cutting and grinding combination mechanism 3 is arranged at the front end of the flange blank conveying and clamping mechanism 2; the flange blank conveying and clamping mechanism 2 includes a flange blank conveying unit and a cutting support unit, the flange blank conveying unit is arranged at the rear end of the processing base 11, and the cutting support unit is arranged at the front end of the processing base 11; the cutting and grinding combination mechanism 3 includes a moving gantry unit and a cutting and grinding unit, the moving gantry units are arranged on both sides of the cutting support unit, and the cutting and grinding unit is arranged above the moving gantry unit, and the flange blank conveying unit includes a threaded rod 2 rotatably installed on one side of the processing base 11 1. A limiting rod 211 is provided on one side of the threaded rod 21, and both ends of the limiting rod 211 are fixedly connected to the other side of the processing base 11. The threaded rod 21 is driven to rotate by a motor installed on the side of the processing base 11. The limiting rod 211 has a limiting effect on the movement of the flange blank tail fixing block 22. The flange blank conveying unit also includes a flange blank tail fixing block 22, and connecting rods 223 are fixedly installed on both sides of the flange blank tail fixing block 22. The inner wall of one side of the connecting rod 223 is threadedly connected to the outer surface of the threaded rod 21, and the inner wall of the other side of the connecting rod 223 is slidably connected to the outer surface of the limiting rod 211. The tail end of the flange blank is passed through the center of the flange blank tail fixing block 22 between the clamping tripod 221, and the clamping tripod 221 is pressed against the surface of the flange blank under the elastic action of the limiting spring 222.

[0033] Furthermore, the clamping tripod 221 is a triangular block, which minimizes the contact area and increases the pressure between the clamping tripod 221 and the flange blank to fix the flange blank. The threaded rod 21 rotates so that the connecting rod 223 can move the flange blank by clamping the flange blank under the limited cooperation of the limiting rod 211. Example

[0034] like Figure 1-8As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, a clamping tripod 221 is symmetrically and slidably installed on the inner wall of the flange blank tail fixing block 22, and a limit spring 222 is fixedly installed between the inner surface of the clamping tripod 221 and the outer surface of the flange blank tail fixing block 22, a water trough is arranged on the upper surface of the cutting trough 23, and a V-shaped long support 24 and a V-shaped short support 25 play a role in supporting the flange blank at the cutting position, and the cutting support unit includes a cutting trough 23 fixedly installed on the upper surface of the processing base 11, and a V-shaped long support 24 and a V-shaped short support 25 are fixedly installed on the upper surface of the cutting trough 23, and the V-shaped long support 24 and the V-shaped short support 25 are fixedly installed on the upper surface of the cutting trough 23. A cutting groove is arranged between the V-shaped bearing short bracket 25, and a flange blank stabilizing baffle 26 is fixedly installed on the upper surface of the V-shaped bearing long bracket 24 and the V-shaped bearing short bracket 25. A pressing ring 262 is hingedly installed on the inner wall of the flange blank stabilizing baffle 26, and an extrusion folding pad 261 is fixedly installed between the outer surface of the pressing ring 262 and the inner surface of the flange blank stabilizing baffle 26. The gap arranged between the V-shaped bearing long bracket 24 and the V-shaped bearing short bracket 25 is a cutting groove. The flange blank stabilizing baffle 26 has a continuous pressing force on the extrusion folding pad 261, so that the pressing ring 262 tightens the flange blank to avoid shaking during cutting, and at the same time fixes the cut flange blank to facilitate the grinding of burrs on the cut surface. Example

[0035] like Figure 1-8 As shown, on the basis of Embodiment 1-2, the present invention provides a technical solution: preferably, the mobile gantry unit includes a gantry 31 slidably mounted on the front upper surface of the processing base 11, a rack 32 is arranged below the gantry 31, the lower surface of the rack 32 is fixedly connected to the front upper surface of the processing base 11, the driving gear 33 is driven to rotate by a motor installed on the side wall of the gantry 31, and the bottom outer surface of the gantry 31 is respectively rotatably mounted with a driving gear 33 and a driven gear 331, the driven gear 331 is meshed with the driving gear 33, the lower surface of the driven gear 331 is meshed with the upper surface of the rack 32, the driving gear 33 is meshed with the driven gear 331 to drive the driven gear 331 to rotate, and the driven gear 331 moves the gantry 31 forward and backward with the cooperation of the rack 32, and the two processing programs of cutting and grinding are switched, thereby improving the practicality of the device. Example

[0036] like Figure 1-8As shown, on the basis of embodiments 1-3, the present invention provides a technical solution: preferably, the cutting and grinding unit includes a threaded rod 2 34 fixedly installed between the inner side walls above the gantry 31, and a movable slide rail 35 is arranged in the middle of the threaded rod 2 34. The two ends of the movable slide rail 35 are respectively rotatably connected to the side walls of the gantry 31, and the movable slide rail 35 is driven by a motor installed above the side wall of the gantry 31. The movable platform 36 moves left and right under the limit cooperation of the threaded rod 2 34 to meet the processing requirements of cutting and grinding. The cutting and grinding unit also includes a movable platform 36 slidably installed between the threaded rods 34. The inner wall of the movable platform 36 is threadedly connected to the outer surface of the movable slide rail 35. A high-pressure water jet cutting equipment assembly 37 is fixedly installed on the front surface of the mobile platform 36, a grinding equipment mounting frame 38 is fixedly installed on the rear surface of the mobile platform 36, a telescopic rod 39 is fixedly installed above the grinding equipment mounting frame 38, and a grinding equipment assembly 391 is fixedly installed on the output end of the telescopic rod 39. Pulleys arranged at the upper and lower ends of the mobile platform 36 reduce the sliding friction with the threaded rod 34. The high-pressure water jet cutting equipment assembly 37 installed on the front side of the mobile platform 36 uses a high-pressure water jet to cut the flange blank, and the telescopic rod 39 on the grinding equipment mounting frame 38 installed on the rear side of the mobile platform 36 descends to allow the motor installed on the grinding equipment assembly 391 and the grinding roller to grind the burrs on the cut section.

[0037] The working principle of the flange cutting device with burr removal function is described in detail below.

[0038] like Figure 1-8 As shown, first, the tail end of the flange blank is passed through the center clamping tripod 221 of the flange blank tail fixing block 22, and the clamping tripod 221 is squeezed toward the surface of the flange blank under the elastic action of the limit spring 222, so that the flange blank is fixed, and the motor drives the threaded rod 21 to rotate so that the connecting rod 223, under the limited cooperation of the limit rod 211, makes the flange blank clamped by the flange blank tail fixing block 22 to move and cut and feed, and then, the V-shaped long support 24 and the V-shaped short support 25 play the role of supporting the flange blank at the cutting position, and the flange blank body stabilizing baffle 26 has a continuous pressing force on the extrusion folding pad 261 so that the pressing ring 262 is pressed against the method The flange blank is tightened, and the motor drives the active gear 33 to rotate so that the driven gear 331 rotates. With the cooperation of the rack 32, the gantry 31 moves forward, and the high-pressure water jet cutting equipment assembly 37 moves to the cutting groove between the V-shaped long support 24 and the V-shaped short support 25, and the flange blank is cut by the high-pressure water jet. Finally, the motor drives the active gear 33 to rotate in the opposite direction so that the driven gear 331 rotates. With the cooperation of the rack 32, the gantry 31 moves backward, and the telescopic rod 39 moves to the cutting groove between the V-shaped long support 24 and the V-shaped short support 25. The telescopic rod 39 descends so that the motor and the grinding roller installed in the grinding equipment assembly 391 can grind the burrs on the cut section.

[0039] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A flange cutting device with a burr removal function, comprising a flange cutting device body (1), wherein a processing base (11) is provided at the bottom of the flange cutting device body (1), characterized in that: A flange blank conveying and clamping mechanism (2) is arranged above the processing base (11), and a cutting and grinding combination mechanism (3) is arranged at the front end of the flange blank conveying and clamping mechanism (2); The flange blank conveying and clamping mechanism (2) comprises a flange blank conveying unit and a cutting support unit, wherein the flange blank conveying unit is arranged at the rear end of the processing base (11), and the cutting support unit is arranged at the front end of the processing base (11); The cutting and grinding combined mechanism (3) comprises a movable gantry unit and a cutting and grinding unit, wherein the movable gantry unit is arranged on both sides of the cutting support unit, and the cutting and grinding unit is arranged above the movable gantry unit.

2. A flange cutting device with burr removal function according to claim 1, characterized in that: The flange blank conveying unit comprises a threaded rod (21) rotatably mounted on one side of a processing base (11), a limiting rod (211) is provided on one side of the threaded rod (21), and two ends of the limiting rod (211) are fixedly connected to the other side of the processing base (11).

3. A flange cutting device with burr removal function according to claim 2, characterized in that: The flange blank conveying unit also includes a flange blank tail fixing block (22), and connecting rods (223) are fixedly installed on both sides of the flange blank tail fixing block (22), an inner wall on one side of the connecting rod (223) is threadedly connected to the outer surface of the threaded rod 1 (21), and an inner wall on the other side of the connecting rod (223) is slidably connected to the outer surface of the limit rod (211).

4. A flange cutting device with burr removal function according to claim 3, characterized in that: A clamping tripod (221) is symmetrically and slidably mounted on the inner side wall of the flange blank tail fixing block (22), and a limit spring (222) is fixedly mounted between the inner side surface of the clamping tripod (221) and the outer side surface of the flange blank tail fixing block (22).

5. The flange cutting device with burr removal function according to claim 1, characterized in that: The cutting support unit comprises a cutting water trough (23) fixedly mounted on the upper surface of the processing base (11), and a V-shaped long bearing support (24) and a V-shaped short bearing support (25) are fixedly mounted on the upper surface of the cutting water trough (23).

6. A flange cutting device with burr removal function according to claim 5, characterized in that: A cutting groove is provided between the V-shaped long load-bearing bracket (24) and the V-shaped short load-bearing bracket (25); a flange blank stabilizing baffle (26) is fixedly mounted on the upper surface of the V-shaped long load-bearing bracket (24) and the V-shaped short load-bearing bracket (25); a pressing ring (262) is hingedly mounted on the inner side wall of the flange blank stabilizing baffle (26); and an extrusion folding pad (261) is fixedly mounted between the outer side surface of the pressing ring (262) and the inner side surface of the flange blank stabilizing baffle (26).

7. The flange cutting device with burr removal function according to claim 1, characterized in that: The movable gantry unit comprises a gantry (31) slidably mounted on the front upper surface of the processing base (11), a rack (32) is arranged below the gantry (31), and the lower surface of the rack (32) is fixedly connected to the front upper surface of the processing base (11).

8. The flange cutting device with burr removal function according to claim 7, characterized in that: A driving gear (33) and a driven gear (331) are rotatably mounted on the outer surface of the bottom of the gantry (31); the driven gear (331) and the driving gear (33) are meshed with each other, and the lower surface of the driven gear (331) and the upper surface of the rack (32) are meshed with each other.

9. The flange cutting device with burr removal function according to claim 1, characterized in that: The cutting and grinding unit comprises a second threaded rod (34) fixedly mounted between the inner side walls above the gantry (31), a movable slide rail (35) being arranged in the middle of the second threaded rod (34), and two ends of the movable slide rail (35) being rotatably connected to the side walls of the gantry (31) respectively.

10. The flange cutting device with burr removal function according to claim 1, characterized in that: The cutting and grinding unit also includes a moving platform (36) slidably mounted between the two threaded rods (34); the inner wall of the moving platform (36) is threadedly connected to the outer surface of the moving slide rail (35); a high-pressure water jet cutting device assembly (37) is fixedly mounted on the front surface of the moving platform (36); a grinding device mounting frame (38) is fixedly mounted on the rear surface of the moving platform (36); a telescopic rod (39) is fixedly mounted above the grinding device mounting frame (38); and a grinding device assembly (391) is fixedly mounted on the output end of the telescopic rod (39).

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