Drill bit fracture protection device of numerical control drilling machine

Abstract

The utility model relates to the technical field of drill bit fracture protection, and discloses a drill bit fracture protection device of a numerical control drilling machine, which comprises a machine tool, a working box is fixedly connected to the top of the machine tool, a drill bit fixing seat is fixedly connected to the bottom of the working box close to the front side, and a pressing mechanism is arranged at the bottom of the working box. And a replacing mechanism is arranged at the bottom of the pressing mechanism. Through a replacement mechanism, one end of a fixing block is pulled, the other end of the fixing block is driven away from a fixing groove of a third connecting block, the third connecting block is taken out of an inserting groove in the bottom of a second connecting block, a damaged protective cover is replaced, a new protective cover is inserted into the inserting groove through the third connecting block, and one end of the fixing block is sent away; the other end of a fixing block slides into a fixing groove in a third connecting block through the elastic force of a second spring until the other end of the fixing block is driven into the fixing groove, then the protection cover can be fixed, the damaged protection cover can be replaced through the operation, and the safety guarantee of workers is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bit fracture protection, in particular to a drill bit fracture protection device for a numerically controlled drilling machine. Background Art

[0002] CNC drilling machines are mainly used for drilling, reaming, boring, tapping and other processing. It is a digitally controlled hole processing machine tool mainly for drilling. Due to the development of machining centers, most CNC drilling machines have been replaced by machining centers. Servo motors refer to engines that control the operation of mechanical components in servo systems. They are auxiliary motor indirect speed change devices. Servo motors can control speed and position accuracy very accurately. They can convert voltage signals into torque and speed to drive the control object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In automatic control systems, they are used as actuators and have the characteristics of small electromechanical time constant, high linearity, and starting voltage.

[0003] According to the patent, a drill bit breakage protection device for an efficiency-controlled drilling machine includes a base, the upper surface of the base is fixedly connected to a drilling platform, one side of the upper surface of the base is fixedly connected to a support seat, the top of the support seat is fixedly connected to a top seat, a hydraulic rod is fixedly installed on the lower surface of the top seat just above the drilling platform, the bottom of the hydraulic rod is fixedly connected to a fixing plate, a drilling rig is fixedly installed in the middle of the lower surface of the fixing plate, and a protection mechanism is arranged on the outside of the drilling rig.

[0004] This patent sets a protective mechanism. When the fixed plate drives the drill rig to press down to drill a hole, the second cylinder will shrink upward, so that the first cylinder and the second cylinder are always protected on the outside of the drill rod, thereby preventing fragments from splashing randomly after the drill rod breaks, thereby ensuring the safety of the workers. At the same time, the pressure plate will press the workpiece downward under the action of the spring, thereby further improving the tightness and safety of the protective cover. However, the protective cover in this patent will be damaged after long-term use. If it is not replaced in time, it will pose a hidden danger to the safety of the workers. This patent does not provide for replacement of the protective cover. Utility Model Content

[0005] The utility model aims to provide a drill bit breakage protection device for a numerically controlled drilling machine to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drill bit breakage protection device for a CNC drilling machine, comprising a machine tool, a working box is fixedly connected to the top of the machine tool, a drill bit fixing seat is fixedly connected to the bottom of the working box near the front, a pressing mechanism is arranged at the bottom of the working box, and a replacement mechanism is arranged at the bottom of the pressing mechanism.

[0007] Preferably, the pressing mechanism includes a first connecting block, which is symmetrically and fixedly connected to the left and right sides of the bottom of the working box, and a first sliding groove is symmetrically opened on the left side of the first connecting block, a rectangular ring is slidably connected in the first sliding groove, a connecting hole is opened on the top of the rectangular ring, a connecting rod is fixedly connected on the upper and lower sides of the first sliding groove, and a first spring is sleeved on the surface of the connecting rod between the top of the first sliding groove and the top of the rectangular ring.

[0008] Preferably, the rectangular ring is slidably connected to the surface of the connecting rod through a connecting hole, the top end of the first spring is fixedly connected to the top of the first slide groove, and the bottom end of the first spring is fixedly connected to the top of the rectangular ring. The connecting rod can make the rectangular ring slide more stably in the first slide groove.

[0009] Preferably, the replacement mechanism includes a second connecting block, the second connecting block is fixedly connected to the bottom of the rectangular ring, a slot is provided at the bottom of the second connecting block, a third connecting block is inserted in the slot, a protective cover is fixedly connected to the bottom of the third connecting block, a second slide groove is provided on the left side of the second connecting block, a fixed groove is provided on the left side of the third connecting block corresponding to the second slide groove, a fixed block is slidably connected in the second slide groove, a limiting ring is fixedly connected to the surface of the fixed block, a connecting frame is fixedly connected to the left side of the second connecting block, a third slide groove is provided on the left side of the connecting frame corresponding to the second slide groove, and a second spring is symmetrically fixedly connected to the right side of the connecting frame.

[0010] Preferably, the right end of the fixing block is slidably connected in the fixing groove, and the other end of the second spring is fixedly connected to the left side of the limiting ring.

[0011] Preferably, there are two groups of replacement mechanisms, which are symmetrically arranged at the bottom of a left-right symmetrical rectangular ring at the bottom of the working box.

[0012] Compared with the prior art, the utility model provides a drill bit breakage protection device for a CNC drilling machine, which has the following beneficial effects:

[0013] 1. The drill bit breakage protection device of the CNC drilling machine uses a downward pressing mechanism. When the device is in operation, the working box drives the drill bit fixing seat to move downward, so that the drill bit moves downward to drill the workpiece. During the drilling process, the protective cover will protect the drill bit so that when the drill bit breaks, the broken drill bit will not splash and cause work-related injuries to the staff. The protective cover can be extended and retracted up and down to meet the requirements of drilling holes of different depths.

[0014] 2. The drill bit breakage protection device of the CNC drilling machine pulls one end of the fixed block through the replacement mechanism to make the other end of the fixed block move out of the fixed groove of the third connecting block, take out the third connecting block from the slot at the bottom of the second connecting block, replace the damaged protective cover, insert the new protective cover into the slot through the third connecting block, and release one end of the fixed block. The other end of the fixed block will slide into the fixed groove in the third connecting block through the elastic force of the second spring until the other end of the fixed block moves into the fixed groove, thereby completing the fixing of the protective cover. This operation can replace the damaged protective cover, thereby ensuring the safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0016] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the pressing mechanism of the utility model structure;

[0018] Figure 3 This is a schematic diagram of the disassembly of the pressing mechanism of the utility model structure;

[0019] Figure 4 This is a schematic diagram of the structure replacement mechanism of the utility model;

[0020] Figure 5 This is a schematic diagram of the disassembly of the structure replacement mechanism of the utility model.

[0021] In the figure: 1. machine tool; 2. work box; 3. drill bit fixing seat; 4. pressing mechanism; 41. first connecting block; 42. first slide groove; 43. rectangular ring; 44. connecting hole; 45. connecting rod; 46. first spring; 5. replacement mechanism; 51. second connecting block; 52. slot; 53. third connecting block; 54. protective cover; 55. second slide groove; 56. fixed groove; 57. fixed block; 58. limiting ring; 59. connecting frame; 511. third slide groove; 513. second spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The utility model provides the following technical solutions:

[0025] Embodiment 1

[0026] See also Figure 1-3 A drill bit breakage protection device for a CNC drilling machine includes a machine tool 1, a working box 2 is fixedly connected to the top of the machine tool 1, a drill bit fixing seat 3 is fixedly connected to the bottom of the working box 2 near the front, a pressing mechanism 4 is arranged at the bottom of the working box 2, and a replacement mechanism 5 is arranged at the bottom of the pressing mechanism 4.

[0027] The pressing mechanism 4 includes a first connecting block 41, which is symmetrically fixedly connected to the left and right sides of the bottom of the working box 2. A first sliding groove 42 is symmetrically opened on the left side of the first connecting block 41. A rectangular ring 43 is slidably connected in the first sliding groove 42. A connecting hole 44 is opened at the top of the rectangular ring 43. A connecting rod 45 is fixedly connected to the upper and lower sides of the first sliding groove 42. A first spring 46 is sleeved on the surface of the connecting rod 45 between the top of the first sliding groove 42 and the top of the rectangular ring 43.

[0028] The rectangular ring 43 is slidably connected to the surface of the connecting rod 45 through the connecting hole 44, the top end of the first spring 46 is fixedly connected to the top of the first slide groove 42, and the bottom end of the first spring 46 is fixedly connected to the top of the rectangular ring 43. The connecting rod 45 can make the rectangular ring 43 slide more stably in the first slide groove 42.

[0029] Embodiment 2

[0030] See also Figure 4-5 , and on the basis of the first embodiment, a replacement mechanism 5 is further obtained.

[0031] The replacement mechanism 5 includes a second connecting block 51, which is fixedly connected to the bottom of the rectangular ring 43. A slot 52 is provided at the bottom of the second connecting block 51, in which a third connecting block 53 is inserted, and a protective cover 54 is fixedly connected to the bottom of the third connecting block 53. A second slide groove 55 is provided on the left side of the second connecting block 51, and a fixed groove 56 is provided on the left side of the third connecting block 53 corresponding to the second slide groove 55. A fixed block 57 is slidably connected in the second slide groove 55, and a limiting ring 58 is fixedly connected to the surface of the fixed block 57. A connecting frame 59 is fixedly connected to the left side of the second connecting block 51, and a third slide groove 511 is provided on the left side of the connecting frame 59 corresponding to the second slide groove 55. A second spring 513 is fixedly connected to the right side of the connecting frame 59 symmetrically front and back.

[0032] The right end of the fixing block 57 is slidably connected in the fixing groove 56 , and the other end of the second spring 513 is fixedly connected to the left side of the limiting ring 58 .

[0033] There are two groups of replacement mechanisms 5 , which are symmetrically arranged at the bottom of a rectangular ring 43 that is symmetrical on the left and right sides of the bottom of the working box 2 .

[0034] In actual operation, when the device is used, the working box 2 drives the drill bit fixing seat 3 to move downward, so that the drill bit moves downward to drill the workpiece. During the drilling process, the protective cover 54 protects the drill bit, so that when the drill bit breaks, the broken drill bit will not splash and cause work injuries to the staff. The protective cover 54 can be extended up and down to meet the requirements of drilling holes of different depths.

[0035] Pull one end of the fixing block 57 to make the other end of the fixing block 57 move out of the fixing groove 56 of the third connecting block 53, take out the third connecting block 53 from the slot 52 at the bottom of the second connecting block 51, replace the damaged protective cover 54, insert the new protective cover 54 into the slot 52 through the third connecting block 53, and move one end of the fixing block 57 away. The other end of the fixing block 57 will slide into the fixing groove 56 in the third connecting block 53 through the elastic force of the second spring 513 until the other end of the fixing block 57 enters the fixing groove 56, and the fixing of the protective cover 54 is completed. This operation can replace the damaged protective cover 54, ensuring the safety of the staff.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A drill bit breakage protection device for a numerically controlled drilling machine, comprising a machine tool (1), characterized in that: The top of the machine tool (1) is fixedly connected to a working box (2); the bottom of the working box (2) is fixedly connected to a drill fixing seat (3) near the front; a pressing mechanism (4) is provided at the bottom of the working box (2); and a replacement mechanism (5) is provided at the bottom of the pressing mechanism (4); The replacement mechanism (5) comprises a second connection block (51), the second connection block (51) is fixedly connected to the bottom of the rectangular ring (43), a slot (52) is provided at the bottom of the second connection block (51), a third connection block (53) is inserted into the slot (52), a protective cover (54) is fixedly connected to the bottom of the third connection block (53), a second slide groove (55) is provided on the left side of the second connection block (51), a fixed groove (56) is provided on the left side of the third connection block (53) corresponding to the second slide groove (55), a fixed block (57) is slidably connected in the second slide groove (55), a limit ring (58) is fixedly connected to the surface of the fixed block (57), a connection frame (59) is fixedly connected to the left side of the second connection block (51), a third slide groove (511) is provided on the left side of the connection frame (59) corresponding to the second slide groove (55), and a second spring (513) is fixedly connected to the right side of the connection frame (59) symmetrically front and rear.

2. The drill bit breakage protection device for a CNC drilling machine according to claim 1, characterized in that: The pressing mechanism (4) comprises a first connecting block (41), the first connecting block (41) being symmetrically fixedly connected to the left and right sides of the bottom of the working box (2), a first sliding groove (42) being symmetrically opened on the left side of the first connecting block (41) in front and back, a rectangular ring (43) being slidably connected in the first sliding groove (42), a connecting hole (44) being opened on the top of the rectangular ring (43), a connecting rod (45) being fixedly connected at the upper and lower sides in the first sliding groove (42), and a first spring (46) being sleeved on the surface of the connecting rod (45) between the top of the first sliding groove (42) and the top of the rectangular ring (43).

3. The drill bit breakage protection device for a CNC drilling machine according to claim 2, characterized in that: The rectangular ring (43) is slidably connected to the surface of the connecting rod (45) through the connecting hole (44); the top end of the first spring (46) is fixedly connected to the top of the first slide groove (42); and the bottom end of the first spring (46) is fixedly connected to the top of the rectangular ring (43).

4. The drill bit breakage protection device for a CNC drilling machine according to claim 1, characterized in that: The right end of the fixing block (57) is slidably connected in the fixing groove (56), and the other end of the second spring (513) is fixedly connected to the left side of the limiting ring (58).

5. The drill bit breakage protection device for a CNC drilling machine according to claim 1, characterized in that: The replacement mechanism (5) has two groups and is symmetrically arranged at the bottom of a rectangular ring (43) that is symmetrical on the left and right sides of the bottom of the working box (2).

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