Positioning drilling device

Abstract

The utility model relates to a positioning drilling device. Comprising a mounting rack with an operation top plate mounted at the top, an electric sliding table is mounted on the operation top plate, and a drilling assembly is mounted on the electric sliding table; a shifting installation bottom plate is installed on the operation top plate, a movable operation table is movably installed on the shifting installation bottom plate, a drilling operation area is arranged on the movable operation table, and the plate positioning assembly is arranged on the movable operation table and used for positioning and clamping parts. A displacement assembly is installed between the displacement installation bottom plate and the movable operation table and used for changing the position of the movable operation table in the plane where the movable operation table is located. The feeding assembly is mounted on the displacement mounting bottom plate and is used for carrying out feeding operation in the drilling operation area; the feeding assembly comprises a stock bin structure, a discharging opening right facing the drilling operation area is formed in the lower portion of the stock bin structure, and the feeding assembly further comprises a pushing mechanism used for pushing parts located on the bottom layer into the drilling operation area. According to the multi-point drilling device, automatic feeding operation and clamping operation of the plate-shaped parts can be achieved, multi-point drilling operation is conducted on the clamped plate parts, the operation process is simple, and the working efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal processing, and particularly relates to a positioning drilling device. Background Art

[0002] Among various industrial raw materials, metal materials are widely used. A metal plate is a thin and flat sheet formed from metal by industrial methods. In industrial production, in order to achieve the fitting and connection of various parts, it is often necessary to drill holes in the parts, and plate-shaped workpieces are raw materials often used in the industrial production process.

[0003] During the drilling operation of metal parts, the drilling device plays a crucial role. A drilling device refers to a device used to process holes in solid materials. Common drilling devices include electric drills, drill presses, etc. With the further development of processing technology, the efficiency of drilling devices has also been greatly improved.

[0004] Although the traditional drilling device can perform efficient drilling operations on metal parts, the above-mentioned drilling device only has a lifting function and does not have a left-right moving device, and can only drill a single point on the material. When multi-point drilling is required, the staff needs to repeatedly disassemble and position and install the parts, and the operation process is cumbersome, time-consuming and laborious; in addition, the existing drilling device is not convenient for automatically loading plate-shaped parts, and the staff needs to manually push and load them, which greatly improves the labor intensity of the staff and has low work efficiency. Therefore, it is urgent to design a positioning drilling device to solve the above problems. Summary of the Utility Model

[0005] The utility model provides a positioning drilling device with reasonable structural design to solve the technical problems existing in the known technology. The utility model can realize the automatic loading and clamping operations of plate-shaped parts, and perform multi-point drilling operations on the clamped plate parts. The operation process is simple and the work efficiency is high, which greatly reduces the labor intensity of the staff.

[0006] The technical solution adopted by the present utility model to solve the technical problems existing in the known technology is as follows: A positioning drilling device includes an installation frame with an operation top plate installed at the top. An electric slide table is vertically installed on the operation top plate, and a drilling assembly is installed on the electric slide table. A displacement installation bottom plate located below the drilling assembly is installed on the operation top plate. A movable operation table is movably installed on the displacement installation bottom plate. A drilling operation area is provided on the movable operation table. The device further includes a plate positioning assembly provided on the movable operation table for positioning and clamping the parts in the drilling operation area. A displacement assembly is installed between the displacement installation bottom plate and the movable operation table for changing the position of the movable operation table in its plane. It also includes a feeding assembly installed on the displacement installation bottom plate for feeding parts into the drilling operation area. The feeding assembly includes a bin structure for placing a stack of several parts. An outlet is provided at the lower part of the bin structure facing the drilling operation area. The feeding assembly also includes a pushing mechanism for pushing the parts at the bottom layer into the drilling operation area.

[0007] The advantages and positive effects of the present utility model are as follows: The present utility model provides a positioning drilling device. By setting a movable operation table, a drilling operation table can be provided for the parts. By setting a plate positioning assembly, the parts on the drilling operation area of the movable operation table can be clamped and positioned. By setting an electric slide table and a drilling assembly, the parts clamped and positioned by the plate positioning assembly can be drilled. By setting a feeding assembly, parts can be pushed into the drilling operation area to achieve automatic feeding operation, without manual feeding by staff, which is time-saving and labor-saving and has high work efficiency. By setting a displacement assembly, the position of the movable operation table in its plane can be changed according to the set parameters, and then the parts clamped and positioned by the plate positioning assembly can be moved, so that multiple drilling points on the parts are sequentially moved to the directly below of the drilling assembly for drilling operation, realizing multi-point drilling of the parts, without the need for staff to repeatedly disassemble and position and install the parts. The operation process is simple and further improves the work efficiency.

[0008] Preferably: The bin structure includes a feeding installation seat fixedly connected to the displacement installation bottom plate. Two sets of stacking limiting plates are fixedly connected to the feeding installation seat and are arranged oppositely. Each stacking limiting plate is of a U-shaped structure. An outlet groove is provided at the bottom surface of each stacking limiting plate. The two outlet grooves form the outlet of the bin structure.

[0009] Preferably: The pushing mechanism includes a pushing cylinder fixedly connected to the feeding installation seat. The pushing cylinder is horizontally arranged and its extending end points between the two sets of stacking limiting plates. The pushing mechanism also includes a pushing plate member installed at the extending end of the pushing cylinder. The pushing plate member is of a U-shaped structure and can move between the two sets of stacking limiting plates.

[0010] Preferably, the shifting assembly includes two groups of X-direction guiding shafts that are horizontally arranged and distributed side by side and fixedly connected to the shifting mounting base plate. On each X-direction guiding shaft, two groups of X-direction sliding blocks are slidably connected through linear bearings. It also includes two groups of Y-direction guiding shafts that are slidably connected to the X-direction sliding blocks through linear bearings, and the moving operation table is fixedly connected to the two groups of Y-direction guiding shafts. It further includes a Y-direction cylinder base, which is installed on two groups of X-direction sliding blocks that are slidably inserted through one group of X-direction guiding shafts. A Y-direction shifting cylinder for pushing the moving operation table to move in the Y direction is installed on the Y-direction cylinder base. It also includes an X-direction driving connecting plate, which is installed on two groups of X-direction sliding blocks that are slidably inserted through one group of Y-direction guiding shafts. An X-direction shifting cylinder is installed on the shifting mounting base plate, and the extending end of the X-direction shifting cylinder is connected to the X-direction driving connecting plate.

[0011] Preferably, the plate positioning assembly includes multiple groups of positioning screws installed on the moving operation table and arranged around the drilling operation area for limiting the parts pushed into the drilling operation area. It also includes a linear clamping mechanism and a swinging clamping mechanism installed on the moving operation table, and the linear clamping mechanism and the swinging clamping mechanism are arranged opposite to each other with respect to the drilling operation area.

[0012] Preferably, the linear clamping mechanism includes a cylinder base installed on the moving operation table, a horizontally arranged clamping cylinder installed on the cylinder base, and a clamping positioning block installed on the extending end of the clamping cylinder. The swinging clamping mechanism includes a swinging cylinder base installed on the moving operation table. A swinging positioning block is pivotally connected to the end of the swinging cylinder base adjacent to the moving operation table through a pin shaft. A convex head for clamping the part is provided at the end of the swinging positioning block far from the pivot point. It also includes a swinging cylinder that is horizontally arranged and pivotally connected between the swinging cylinder base and the swinging positioning block.

[0013] Preferably, the drilling assembly includes a drilling lifting seat installed on the slide of the electric slide table, a drilling motor with its output shaft facing downward fixedly connected to the drilling lifting seat. It also includes a rotating shaft seat installed on the drilling lifting seat, a longitudinally arranged drill bit rotating shaft rotatably connected to the rotating shaft seat, a drill bit installed on the drill bit rotating shaft, and a drill bit driving pair installed between the drill bit rotating shaft and the output shaft of the drilling motor. Description of the Drawings

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is a three-dimensional structural schematic diagram of the feeding assembly in the present utility model;

[0016] Figure 3 is a three-dimensional structural schematic diagram of the plate positioning assembly in the present utility model;

[0017] Figure 4 is a three-dimensional structural schematic diagram of the shifting assembly in the present utility model;

[0018] Figure 5 Yes Figure 1 Schematic enlarged view of area A in

[0019] In the figure: 1. Installation rack; 2. Operation top plate; 3. Plate positioning assembly; 3-1. Swing cylinder; 3-2. Swing cylinder seat; 3-3. Swing positioning block; 3-4. Positioning screw; 3-5. Clamping cylinder; 3-6. Clamping positioning block; 4. Loading assembly; 4-1. Loading mounting seat; 4-2. Pushing cylinder; 4-3. Pushing plate; 4-4. Stacking limit plate; 4-5. Discharge chute; 5. Shifting assembly; 5-1. X-direction shifting cylinder; 5-2. X-direction driving connecting plate; 5-3. X-direction sliding block; 5-4. Y-direction guiding shaft; 5-5. Y-direction shifting cylinder; 5-6. X-direction guiding shaft; 5-7. Y-direction cylinder seat; 5-8. Y-direction driving block; 6. Shifting mounting bottom plate; 7. Moving operation table; 8. Electric slide; 9. Drilling assembly; 9-1. Drill bit; 9-2. Drill bit driving pair; 9-3. Drill bit rotating shaft; 9-4. Rotating shaft seat; 9-5. Drilling motor; 9-6. Drilling lifting seat; 10. Protective plate. Specific implementation manner

[0020] To further understand the invention content, features and effects of the present utility model, the following embodiments are given for detailed description as follows:

[0021] Please refer to Figure 1 , the positioning and drilling device of the present utility model includes an installation rack 1 with an operation top plate 2 installed on the top, and a plurality of support feet and a plurality of universal casters are installed at the bottom of the installation rack 1. An upright electric slide 8 is installed on the operation top plate 2, and a drilling assembly 9 is installed on the electric slide 8.

[0022] As Figure 5 shown, the above-mentioned drilling assembly 9 includes a drilling lifting seat 9-6 installed on the slide of the electric slide 8, a drilling motor 9-5 with an output shaft facing downwards is fixedly connected to the drilling lifting seat 9-6, and further includes a rotating shaft seat 9-4 installed on the drilling lifting seat 9-6, a longitudinally arranged drill bit rotating shaft 9-3 is rotatably connected to the rotating shaft seat 9-4, a drill bit 9-1 is installed on the drill bit rotating shaft 9-3, and further includes a drill bit driving pair 9-2 installed between the output shaft of the drill bit rotating shaft 9-3 and the output shaft of the drilling motor 9-5.

[0023] The above-mentioned drill bit driving pair 9-2 adopts a belt pulley transmission pair, including a driving belt pulley key-connected to the output shaft of the drilling motor 9-5, and also including a driven belt pulley key-connected to the drill bit rotating shaft 9-3. A belt is drivingly connected between the driving belt pulley and the driven belt pulley. The drilling assembly 9 further includes a protective cover installed on the drilling lifting seat 9-6 and covering the outside of the rotating shaft seat 9-4 and the drill bit driving pair 9-2. This embodiment further includes two groups of protective plates 10 installed on the operation top plate 2 and arranged oppositely. The two groups of protective plates 10 are respectively located on both sides of the drilling assembly 9 to prevent the slag generated during drilling from splashing to both sides.

[0024] A displacement mounting base plate 6 is installed on the operation top plate 2 and located below the drilling assembly 9. A movable operation table 7 is movably installed on the displacement mounting base plate 6. A drilling operation area is provided on the movable operation table 7. It also includes a plate positioning assembly 3 provided on the movable operation table 7 for positioning and clamping the parts in the drilling operation area.

[0025] As Figure 3 shown, the above-mentioned plate positioning assembly 3 includes multiple groups of positioning screws 3-4 installed on the movable operation table 7 and arranged around the drilling operation area for limiting the parts pushed into the drilling operation area; it also includes a linear clamping mechanism and a swing clamping mechanism installed on the movable operation table 7. The linear clamping mechanism and the swing clamping mechanism are arranged oppositely with respect to the drilling operation area; in addition, the above-mentioned linear clamping mechanism and swing clamping mechanism are respectively located on both sides of the discharge port of the bin structure. Multiple groups of positioning screws 3-4 are provided between the linear clamping mechanism and the swing clamping mechanism and are aligned with the discharge port of the bin structure.

[0026] Among them, the above-mentioned linear clamping mechanism includes a cylinder seat installed on the movable operation table 7. The cylinder seat is made of channel steel. A horizontally arranged clamping cylinder 3-5 is installed on the cylinder seat. A clamping positioning block 3-6 is installed at the extending end of the clamping cylinder 3-5. The lower end of the clamping positioning block 3-6 is in clearance fit with the top surface of the movable operation table 7. Multiple groups of positioning screws 3-4 are provided on both sides of the linear clamping mechanism.

[0027] As Figure 3 shown, the above-mentioned swing clamping mechanism includes a swing cylinder seat 3-2 installed on the movable operation table 7. A swing positioning block 3-3 is pivotally connected to the end of the swing cylinder seat 3-2 adjacent to the movable operation table 7 through a pin shaft. Among them, a convex head for clamping the part is provided at the end of the swing positioning block 3-3 away from the pivot point. The swing clamping mechanism also includes a swing cylinder 3-1 arranged horizontally and pivotally connected between the swing cylinder seat 3-2 and the swing positioning block 3-3. Among them, the cylinder barrel of the swing cylinder 3-1 is pivotally connected to the end of the swing cylinder seat 3-2 away from the movable operation table 7. A fish-eye joint is installed at the extending end of the swing cylinder 3-1 and is pivotally connected to the middle of the swing positioning block 3-3 through the fish-eye joint and the pin shaft.

[0028] As Figure 1 shown, in order to achieve automatic feeding operation, this embodiment further includes a feeding assembly 4 installed on the shifting mounting base plate 6 for pushing and feeding parts into the drilling operation area. Among them, the feeding assembly 4 includes a bin structure for placing a plurality of stacked parts, and a discharge port facing the drilling operation area is opened at the lower part of the bin structure. It also includes a pushing mechanism for pushing the parts at the bottom layer into the drilling operation area.

[0029] As Figure 2 shown, the above-mentioned bin structure includes a feeding mounting seat 4-1 fixedly connected to the shifting mounting base plate 6, and two sets of stacking limiting plates 4-4 arranged oppositely and fixedly connected to the feeding mounting seat 4-1. Each stacking limiting plate 4-4 is of a U-shaped structure, and a discharge slot 4-5 is opened at the bottom surface of each stacking limiting plate 4-4. The two discharge slots 4-5 form the discharge port of the bin structure.

[0030] The pushing mechanism includes a pushing cylinder 4-2 fixedly connected to the feeding mounting seat 4-1. The pushing cylinder 4-2 is horizontally arranged and located on the median line of the bin structure. The extending end of the pushing cylinder 4-2 points between the two sets of stacking limiting plates 4-4. The pushing mechanism also includes a pushing plate member 4-3 installed at the extending end of the pushing cylinder 4-2. The pushing plate member 4-3 is of a U-shaped structure and can move between the two sets of stacking limiting plates 4-4. In order to facilitate the movement of the pushing plate member 4-3 and avoid collision between the pushing plate member 4-3 and the stacking limiting plates 4-4, chamfers are provided at the corners of the pushing plate member 4-3. In addition, the above-mentioned discharge slot 4-5 is in clearance fit with the pushing plate member 4-3 to facilitate the pushing plate member 4-3 to penetrate through the discharge slot 4-5.

[0031] In addition, as Figure 1 shown, in order to perform multi-point drilling, a shifting assembly 5 is installed between the shifting mounting base plate 6 and the moving operation table 7 for changing the position of the moving operation table 7 in its plane; in addition, the above-mentioned moving operation table 7 is in clearance fit with the bin structure in the feeding assembly 4, so as to ensure that the moving operation table 7 can move horizontally driven by the shifting assembly 5.

[0032] As Figure 4 shown, the above-mentioned shifting assembly 5 includes two sets of X-direction guiding shafts 5-6 which are horizontally arranged and distributed in parallel and fixedly connected to the shifting mounting base plate 6. Two sets of X-direction sliders 5-3 are slidably connected to each X-direction guiding shaft 5-6 through linear bearings. It also includes two sets of Y-direction guiding shafts 5-4 which are slidably connected to the X-direction sliders 5-3 through linear bearings. Each Y-direction guiding shaft 5-4 is respectively installed on two X-direction sliders 5-3 which are located on the same side and installed on two 5-6s. The moving operation table 7 is fixedly connected to the two sets of Y-direction guiding shafts 5-4.

[0033] The shifting component 5 further includes a Y-direction cylinder seat 5-7. The Y-direction cylinder seat 5-7 is mounted on two sets of X-direction sliders 5-3 that are slidably sleeved on a set of X-direction guide shafts 5-6. A Y-direction shifting cylinder 5-5 is mounted on the Y-direction cylinder seat 5-7 and is used to push the movable operation table 7 to move in the Y direction. At the end of the bottom surface of the movable operation table 7, a Y-direction driving block 5-8 is mounted. The extending end of the Y-direction shifting cylinder 5-5 is connected to the Y-direction driving block 5-8.

[0034] The shifting component 5 further includes an X-direction driving connecting plate 5-2. The X-direction driving connecting plate 5-2 is mounted on two sets of X-direction sliders 5-3 that are slidably sleeved on a set of Y-direction guide shafts 5-4. An X-direction shifting cylinder 5-1 is mounted on the shifting installation base plate 6. The extending end of the X-direction shifting cylinder 5-1 is connected to the X-direction driving connecting plate 5-2.

[0035] Working principle:

[0036] Before the drilling operation, stack the parts to be drilled between the two sets of stacking limit plates 4-4, and then set the sequential telescoping parameters of the piston rod of the X-direction shifting cylinder 5-1 and the piston rod of the Y-direction shifting cylinder 5-5 in the shifting component 5 according to the spacing between the holes to be processed.

[0037] Under the action of the shifting component 5, the movable operation table 7 moves to the initial position. At this time, the drilling operation area on the movable operation table 7 is directly opposite to the discharge port of the bin structure in the feeding component 4. The pushing cylinder 4-2 is activated, and its piston rod extends to drive the pushing plate member 4-3 to move forward, pushing the bottommost part into the drilling operation area. Then, the piston rods of the swinging cylinder 3-1 and the clamping cylinder 3-5 extend to perform the clamping and positioning operation on the part.

[0038] According to the position of the hole to be drilled, the X-direction shifting cylinder 5-1 and the Y-direction shifting cylinder 5-5 are activated, so that the first drilling point on the part moves to directly below the drill bit 9-1 in the drilling component 9. The electric slide table 8 is activated to drive the drilling component 9 to descend to the preset position, and the rotating drill bit 9-1 drills at the first drilling point on the part. After completing the above drilling operation, the electric slide table 8 is activated again to drive the drilling component 9 to move upward to the waiting position. Then, according to the set parameters, the X-direction shifting cylinder 5-1 and the Y-direction shifting cylinder 5-5 are activated again, so that the next drilling point on the part moves to directly below the drill bit 9-1 in the drilling component 9. The electric slide table 8 is activated again to drive the drilling component 9 to descend, so that the rotating drill bit 9-1 drills at the next drilling point on the part.

[0039] Repeat the above operations until all drilling operations are completed. Then, use the shifting component 5 to move the parts on the movable operating table 7 to a position convenient for blanking outside the drilling component 9. The piston rods of the swing cylinder 3-1 and the clamping cylinder 3-5 retract to release the clamping and positioning of the parts, and then the parts that have completed the drilling operation can be removed. Then, the movable operating table 7 moves back to its original position to perform subsequent loading and drilling operations.

Claims

1. A positioning drilling device, characterized in that: It includes an installation rack (1) with an operation top plate (2) installed on the top. An electric slide table (8) vertically arranged is installed on the operation top plate (2), and a drilling assembly (9) is installed on the electric slide table (8); a displacement installation bottom plate (6) located below the drilling assembly (9) is installed on the operation top plate (2), a mobile operation table (7) is movably installed on the displacement installation bottom plate (6), a drilling operation area is arranged on the mobile operation table (7), and it also includes a plate positioning assembly (3) arranged on the mobile operation table (7) for positioning and clamping parts in the drilling operation area; a displacement assembly (5) is installed between the displacement installation bottom plate (6) and the mobile operation table (7) for changing the position of the mobile operation table (7) in its plane; it also includes a feeding assembly (4) installed on the displacement installation bottom plate (6) for feeding operations into the drilling operation area; the feeding assembly (4) includes a bin structure for placing a number of stacked parts, a discharge port facing the drilling operation area is opened at the lower part of the bin structure, and it also includes a pushing mechanism for pushing the parts at the bottom layer into the drilling operation area.

2. The positioning and drilling device according to claim 1, wherein: The bin structure includes a feeding installation seat (4-1) fixedly connected to the displacement installation bottom plate (6). Two sets of stacking limiting plates (4-4) arranged oppositely are fixedly connected to the feeding installation seat (4-1). Each stacking limiting plate (4-4) is of a U-shaped structure, and a discharge slot (4-5) is opened at the bottom surface of each stacking limiting plate (4-4). The two discharge slots (4-5) form the discharge port of the bin structure.

3. The positioning and drilling device according to claim 2, characterized in that: The pushing mechanism includes a pushing cylinder (4-2) fixedly connected to the feeding installation seat (4-1). The pushing cylinder (4-2) is horizontally arranged and its extending end points between the two sets of stacking limiting plates (4-4). It also includes a pushing plate member (4-3) installed at the extending end of the pushing cylinder (4-2). The pushing plate member (4-3) is of a U-shaped structure and can move between the two sets of stacking limiting plates (4-4).

4. The positioning and drilling device according to claim 1, wherein: The displacement assembly (5) includes two sets of X-direction guiding shafts (5-6) which are horizontally arranged and distributed side by side and fixedly connected to the displacement installation bottom plate (6). Two sets of X-direction sliders (5-3) are slidably connected to each X-direction guiding shaft (5-6) through linear bearings. It also includes two sets of Y-direction guiding shafts (5-4) which are slidably connected to the X-direction sliders (5-3) through linear bearings. The mobile operation table (7) is fixedly connected to the two sets of Y-direction guiding shafts (5-4); it also includes a Y-direction cylinder seat (5-7). The Y-direction cylinder seat (5-7) is installed on the two sets of X-direction sliders (5-3) which are slidably sleeved on a set of X-direction guiding shafts (5-6). A Y-direction displacement cylinder (5-5) for pushing the mobile operation table (7) to move in the Y direction is installed on the Y-direction cylinder seat (5-7); it also includes an X-direction driving connecting plate (5-2). The X-direction driving connecting plate (5-2) is installed on the two sets of X-direction sliders (5-3) which are slidably sleeved on a set of Y-direction guiding shafts (5-4). An X-direction displacement cylinder (5-1) is installed on the displacement installation bottom plate (6), and the extending end of the X-direction displacement cylinder (5-1) is connected to the X-direction driving connecting plate (5-2).

5. The positioning and drilling device according to claim 1, characterized in that: The plate positioning assembly (3) includes multiple groups of positioning screws (3-4) installed on the mobile operation table (7) and arranged around the drilling operation area for limiting the parts pushed into the drilling operation area; it also includes a linear clamping mechanism and a swing clamping mechanism installed on the mobile operation table (7), and the linear clamping mechanism and the swing clamping mechanism are arranged oppositely with respect to the drilling operation area.

6. The positioning and drilling device according to claim 5, characterized in that: The linear clamping mechanism includes a cylinder seat installed on the mobile operation table (7), a horizontally arranged clamping cylinder (3-5) installed on the cylinder seat, and a clamping positioning block (3-6) installed on the extending end of the clamping cylinder (3-5); the swing clamping mechanism includes a swing cylinder seat (3-2) installed on the mobile operation table (7), a swing positioning block (3-3) pivotally connected to the end of the swing cylinder seat (3-2) adjacent to the mobile operation table (7) through a pin shaft, a convex head for clamping the part is arranged at the end of the swing positioning block (3-3) far from the pivot point; it also includes a swing cylinder (3-1) arranged horizontally and pivotally connected between the swing cylinder seat (3-2) and the swing positioning block (3-3).

7. The positioning and drilling device according to claim 1, wherein: The drilling assembly (9) includes a drilling lifting seat (9-6) installed on the slide of the electric slide table (8), a drilling motor (9-5) with the output shaft facing downwards is fixedly connected to the drilling lifting seat (9-6), it also includes a rotating shaft seat (9-4) installed on the drilling lifting seat (9-6), a longitudinally arranged drill bit rotating shaft (9-3) is rotatably connected to the rotating shaft seat (9-4), a drill bit (9-1) is installed on the drill bit rotating shaft (9-3), it also includes a drill bit driving pair (9-2) installed between the drill bit rotating shaft (9-3) and the output shaft of the drilling motor (9-5).

Images