Telescopic rocker arm device of portable boring machine

Abstract

The utility model relates to a telescopic rocker arm device of a portable boring machine, which comprises an outer sleeve and a telescopic cylinder which are matched and connected through a feather key structure, a supporting pipe is arranged on a rear end cover of the outer sleeve, the outer sleeve and the supporting pipe form a whole, and a telescopic nut is coaxial with the supporting pipe and is welded on the end face of the supporting pipe. The outer wall of the supporting pipe and the outer wall of the telescopic nut are sleeved with a tool rest supporting cylinder, the tool rest supporting cylinder is connected with the front end cover, the telescopic lead screw is meshed with the telescopic nut and is arranged in the supporting pipe, the telescopic lead screw is connected with the tool rest supporting cylinder, and the telescopic lead screw, the tool rest supporting cylinder, the front end cover and the telescopic cylinder form a whole. The tool rest moving part is supported on the sleeve, the transmission lead screw is meshed with the transmission nut, the front end of the transmission lead screw is installed on the front end cover, the touch star is installed at the end of the front end of the transmission lead screw, and when the transmission lead screw rotates, the tool rest moving part moves on the support sleeve. According to the telescopic rocker arm, the stroke of a cutter is increased, and the telescopic rocker arm is suitable for machining planes with large ring diameters.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical plane processing, in particular to a telescopic rocker arm device of a portable boring machine. Background Art

[0002] The on-site construction of large-scale annular plane processing requires the installation and erection of large boring bars on site corresponding to the center of the annular plane. Fig. 9 A schematic diagram of a conventional rocker arm for machining an annular plane is shown, wherein a rocker arm 901 is installed on a boring bar 900, and a plane machining tool is installed on the execution end of the rocker arm 901. The rocker arm 901 drives the tool 902 to machine the annular plane with the boring bar 900 as the axis. For plane machining with a large ring diameter, when the machining stroke of the tool 902 reaches the maximum, a gasket 904 needs to be installed between the sleeve 903 on the boring bar 900 and the rocker arm 901, and the defect of insufficient tool stroke on the rocker arm is compensated by the thickness of the gasket 904. This method is complicated to install and adjust, requires a lot of manual operation, and is very inconvenient for on-site construction handling and transportation. Utility Model Content

[0003] In view of the above problems, the utility model proposes a portable boring machine telescopic rocker arm device, in which the rocker arm is designed to be telescopic, thereby increasing the stroke of the tool and being suitable for plane processing with a larger ring diameter.

[0004] In order to achieve the above purpose, the following technical scheme is adopted: a portable boring machine telescopic rocker device, including an outer sleeve, a telescopic sleeve, a tool holder support sleeve, a support tube, a telescopic screw rod, a telescopic nut, a tool holder moving part, a transmission screw rod and a collision star, wherein the tool holder moving part includes a tool holder, a center sleeve and a transmission nut, and the outer sleeve and the telescopic sleeve are respectively provided with a tool holder limiting slide groove for the tool holder to slide along the axial direction, and a nut limiting slide groove for the transmission nut to slide along the axial direction.

[0005] The outer sleeve is sleeved on the outer wall of the telescopic sleeve, a rear end cover is arranged on the end face of the outer sleeve, a front end cover is arranged on the front end face of the telescopic sleeve, a support tube is installed on the center hole of the rear end cover, a telescopic nut is coaxial with the support tube and is welded to the end face of the support tube, a tool holder support tube is sleeved on the outer wall of the support tube and the telescopic nut, a front end face of the tool holder support tube is connected with the front end cover, a telescopic screw rod is meshed with the telescopic nut and is partially located in the support tube, a front end part of the telescopic screw rod is connected with the inner wall of the tool holder support tube, so that the telescopic screw rod rotates with the cooperation of the telescopic nut to generate axial displacement, driving the tool holder support tube to move, and the front end of the telescopic screw rod is located in the center hole of the front end cover.

[0006] The center sleeve of the tool holder moving part is sleeved on the tool holder supporting tube, and the tool holder is located in the tool holder limiting slide groove, the transmission nut is located in the nut limiting slide groove, the transmission screw is engaged with the transmission nut and the front end is installed on the front end cover, and a collision star is installed on the front end end of the transmission screw, and when the collision type hits the touching object and rotates, it drives the transmission screw to rotate.

[0007] Furthermore, the outer sleeve and the telescopic sleeve are connected by a sliding key structure, and a locking key structure for locking the sliding is arranged on the wall of the outer sleeve.

[0008] Furthermore, the key locking structure includes a key pressing cover and a locking bolt. The key pressing cover is installed at the key slot of the outer sleeve. The locking bolt is installed on the key pressing cover and acts on the first sliding key in the key slot.

[0009] Furthermore, the center sleeve of the tool holder moving part is connected to the tool holder supporting cylinder through a sliding key structure.

[0010] Furthermore, a lap boss is provided along the circumference of the rod at the front end portion of the telescopic screw rod, and a sunken step corresponding to the lap boss is processed on the inner edge of the end surface of the tool holder support tube. The sunken step and the front end cover form a lap boss mounting groove. The lap boss of the telescopic screw rod is installed in the boss mounting groove through a nylon gasket, so that the front end portion of the telescopic screw rod is connected to the inner wall of the tool holder support tube.

[0011] Furthermore, the end of the front end of the telescopic screw rod is processed into a hexagonal shape.

[0012] Beneficial effects of the utility model: the outer sleeve and the telescopic sleeve are connected by a sliding key structure, and the telescopic screw rod rotates in a fixed telescopic screw nut to generate displacement to drive the tool holder support sleeve and the telescopic sleeve to achieve telescopic purpose in the outer sleeve, thereby increasing the processing stroke of the tool holder moving part installed on the movable tool holder support sleeve, and is suitable for plane processing with a large ring diameter. It is only necessary to adjust the telescopic length of the telescopic sleeve and lock it according to the ring diameter of the processed annular plane, which is convenient to operate, and the small size is convenient for transportation and on-site handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a structural schematic diagram of another perspective of the utility model;

[0015] Figure 3 for Figure 1 A cross-sectional view of

[0016] Figure 4 It is the front view of the utility model;

[0017] Figure 5 for Figure 4 CC direction view;

[0018] Figure 6 for Figure 5 AA direction view;

[0019] Figure 7 for Figure 5 BB direction view;

[0020] Figure 8 It is a top view of the utility model;

[0021] Fig. 9 It is a schematic diagram of a traditional rocker arm processing annular plane.

[0022] As shown in the figure: 1. Outer sleeve; 2. Telescopic cylinder; 3. Tool holder support cylinder; 4. Support tube; 5. Telescopic screw rod; 6. Telescopic nut; 7. Transmission screw rod; 8. Contact star; 9. Tool holder; 10. Center sleeve; 11. Transmission nut; 12. Key cover; 13. Locking bolt; 14. First sliding key; 15. Rear end cover; 16. Front end cover; 17. Nylon gasket; 500, Overlap boss; 900, Boring bar; 901, Rocker arm; 902, Tool; 903, Bushing; 904, Gasket. DETAILED DESCRIPTION

[0023] Example 1

[0024] The following is further described with reference to the accompanying drawings: Figure 1-8 To provide a portable boring machine telescopic rocker device, including an outer sleeve 1, a telescopic sleeve 2, a tool holder support sleeve 3, a support tube 4, a telescopic screw rod 5, a telescopic nut 6, a tool holder moving part, a transmission screw rod 7 and a collision star 8, the tool holder moving part includes a tool holder 9, a center sleeve 10 and a transmission nut 11, wherein,

[0025] The tool holder 9 and the center sleeve 10 are integrally formed, and the transmission nut 11 is connected to the center sleeve 10 as a whole by bolts. The outer sleeve 1 and the telescopic sleeve 2 are respectively provided with a tool holder limiting slide groove for the tool holder 9 to slide along the axial direction, and a nut limiting slide groove for the transmission nut 11 to slide along the axial direction.

[0026] The outer sleeve 1 is sleeved on the 2 outer walls of the telescopic cylinder. The outer sleeve 1 and the 2 telescopic cylinders are connected by a sliding key structure to ensure that the tool holder limit slots of the two overlap in a normal state, and the nut limit slots also overlap; when stretched, the tool holder limit slots of the two form a connected and complete tool holder limit slot, and the nut limit slot also forms a connected and complete tool holder limit slot. A key pressure cover 12 is installed at the key slot of the outer sleeve 1, and a locking bolt 13 is installed on the key pressure cover 12 and acts on the first sliding key 14 in the key slot. A rear end cover 15 is provided on the end surface of the outer sleeve 1, and the support tube 4 is installed on the center hole of the rear end cover 15. The outer sleeve 1, the rear end cover 15 and the support tube 4 form a whole.

[0027] The telescopic nut 6 is coaxial with the support tube 4 and welded to the end face of the support tube 4. The tool holder support tube 3 is mounted on the outer walls of the support tube 4 and the telescopic nut 6, and there is a gap between the tool holder support tube 3 and the two. The front end face of the telescopic tube 2 is provided with a front end cover 16, and the front end cover 16 is connected to the front end face of the telescopic tube 2 by bolts. The end face of the tool holder support tube 3 is located in the same plane as the front end face of the telescopic tube 2, and is connected to the front end cover 16 by bolts.

[0028] The telescopic screw rod 5 is screwed into the thread hole of the telescopic nut 6, and the tail end part is placed at the bottom of the support tube 4. The front end part of the telescopic screw rod 5 is connected to the inner wall of the tool holder support tube 3, so that the telescopic screw rod 5 can drive the tool holder support tube 3 to move when it rotates and produces axial displacement under the cooperation of the telescopic nut 6. The specific structure is that a circle of overlapping bosses 500 are processed along the circumference of the rod at the front end part of the telescopic screw rod 5, and a sinking step corresponding to the overlapping boss 500 is processed on the inner edge of the end face of the tool holder support tube 3. The sinking step and the front end cover 16 form an overlapping boss mounting groove. The overlapping boss 500 of the telescopic screw rod 5 is installed in the boss mounting groove through a nylon gasket 17, so that the front end of the telescopic screw rod 5, the tool holder support tube 3, the front end cover 16 and the telescopic tube 2 are integrated. The front end of the telescopic screw rod 5 is located in the center hole of the front end cover 16. The end head of the front end of the telescopic screw rod 5 is processed into a hexagonal shape for an external crank wrench.

[0029] The center sleeve 10 of the tool holder moving part is sleeved on the tool holder support tube 3, and the two are connected by a sliding key structure, and the tool holder 9 is located in the tool holder limit slide groove, the transmission screw 11 is located in the screw nut limit slide groove, the transmission screw 7 is screwed into the thread hole of the transmission screw 11, and the front end is installed on the front cover 16, and the front end of the transmission screw 7 is installed with a collision star 8. When the collision star 8 knocks down the contact object and rotates, it drives the transmission screw 7 to rotate. When the collision object described in this embodiment is a processing plane, a striker is set above the processing plane.

[0030] The working principle of this embodiment is to adjust the extension length of the telescopic cylinder 2 according to the ring diameter of the annular plane processed on site. The specific operation is to twist the front end of the telescopic screw rod 5 by using an external crank wrench. Since the telescopic nut 6 is welded to the support tube 4 as a whole and is considered to be fixed, the telescopic screw rod 5 produces axial displacement, driving the tool holder support cylinder 3, the front end cover 16 and the telescopic cylinder 2 to extend at the same time. At the same time, the tool holder moving part located on the tool holder support cylinder 3 increases its stroke at the same time. When the extension length required to be adjusted is reached, the locking bolt 13 of the key cover 12 is adjusted to act on the first sliding key 14 to lock it, that is, the extension length of the telescopic cylinder 2 is locked. The telescopic rocker arm device of the embodiment is installed on the sleeve on the boring bar, and the processing tool is installed on the tool holder 9 of the tool holder moving part. As the boring bar rotates, the telescopic rocker arm device of this embodiment is driven to process the annular plane. When the tool on the tool holder 9 completes one circle of processing and the touch star 8 touches the external touch object, the rotation of the touch star 8 drives the transmission screw rod 7 to rotate. Since the tool holder moving part is mounted on the tool holder support tube 3, the rotation of the transmission screw rod 7 drives the transmission nut 11 to generate displacement, and the tool holder 9 also generates displacement to complete the diameter change processing of the processing tool. As the boring bar rotates continuously, the touch star 8 continuously touches the external touch object, and the tool continuously changes its diameter with the number of rotations to complete the processing of the annular diameter plane.

[0031] The present invention is not limited to this embodiment, and any equivalent concepts or changes within the technical scope disclosed in the present invention are included in the protection scope of the present invention.

Claims

1. A portable boring machine telescopic rocker arm device, characterized in that: The tool holder comprises an outer sleeve (1), a telescopic sleeve (2), a tool holder support sleeve (3), a support tube (4), a telescopic screw rod (5), a telescopic nut (6), a tool holder moving part, a transmission screw rod (7) and a contact star (8), wherein the tool holder moving part comprises a tool holder (9), a center sleeve (10) and a transmission nut (11), and the outer sleeve (1) and the telescopic sleeve (2) are respectively provided with a tool holder limiting slide groove for the tool holder (9) to slide along the axial direction, and a nut limiting slide groove for the transmission nut (11) to slide along the axial direction. The outer sleeve (1) is sleeved on the outer wall of the telescopic tube (2); a rear end cover (15) is arranged on the end face of the outer sleeve (1); a front end cover (16) is arranged on the front end face of the telescopic tube (2); the support tube (4) is mounted on the center hole of the rear end cover (15); the telescopic nut (6) is coaxial with the support tube (4) and welded to the end face of the support tube (4); a tool holder support tube (3) is sleeved on the outer wall of the support tube (4) and the telescopic nut (6); the front end face of the tool holder support tube (3) is connected to the front end cover (16); the telescopic screw rod (5) is meshed with the telescopic nut (6) and is partially located in the support tube (4); the front end part of the telescopic screw rod (5) is connected to the inner wall of the tool holder support tube (3) so that when the telescopic screw rod (5) rotates to generate axial displacement under the cooperation of the telescopic nut (6), the tool holder support tube (3) is displaced; the front end of the telescopic screw rod (5) is located in the center hole of the front end cover (16). The center sleeve (10) of the tool holder moving part is sleeved on the tool holder supporting tube (3), and the tool holder (9) is located in the tool holder limiting slide groove, the transmission nut (11) is located in the nut limiting slide groove, the transmission screw rod (7) is meshed with the transmission nut (11) and the front end is installed on the front end cover (16), and the front end end of the transmission screw rod (7) is installed with a collision star (8), when the collision star (8) hits the contact object and rotates, it drives the transmission screw rod (7) to rotate.

2. The portable boring machine telescopic rocker arm device according to claim 1, characterized in that: The outer sleeve (1) and the telescopic sleeve (2) are connected by means of a sliding key structure, and a locking key structure for locking the sliding movement is arranged on the wall of the outer sleeve (1).

3. The portable boring machine telescopic rocker arm device according to claim 2, characterized in that: The key locking structure comprises a key pressing cover (12) and a locking bolt (13); the key pressing cover (12) is installed at the key slot of the outer sleeve (1); the locking bolt (13) is installed on the key pressing cover (12) and acts on the first sliding key (14) in the key slot.

4. The portable boring machine telescopic rocker arm device according to claim 3, characterized in that: The center sleeve (10) of the tool holder moving part is connected to the tool holder supporting tube (3) through a sliding key structure.

5. The portable boring machine telescopic rocker arm device according to claim 4, characterized in that: The front end portion of the telescopic screw rod (5) is provided with a lap boss (500) along the circumference of the rod, and the inner edge of the end surface of the tool holder support tube (3) is processed with a sunken step corresponding to the lap boss (500), and the sunken step and the front end cover (16) form a lap boss mounting groove, and the lap boss (500) of the telescopic screw rod (5) is installed in the boss mounting groove through a nylon gasket (17), so that the front end portion of the telescopic screw rod (5) is connected to the inner wall of the tool holder support tube (3).

6. The portable boring machine telescopic rocker arm device according to claim 5, characterized in that: The front end of the telescopic screw rod (5) is processed into a hexagonal shape.

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