Drill bit conversion assembly for benchtop drilling machine

Abstract

The utility model discloses a drill bit conversion assembly for a benchtop drilling machine, which belongs to the technical field of drilling machines; it comprises: a clamp seat 1, a clamp seat 2, a drill bit fixing rod, a drill bit, a bolt rod, and an elastic member; the bolt rod is movably inserted into a bolt rod channel, and one end of the bolt rod located in the channel is set as an inner end, and the inner end is detachably embedded in the side wall of the bolt rod; an elastic member is sleeved on the outer side of the bolt rod located outside the clamp seat; one end of the elastic member is set on the side wall of the clamp seat, and the other end is set on the side wall of the bolt rod; except for the end of the elastic member connected to the side wall of the bolt rod, the rest of the elastic member has no connection relationship with the bolt rod. The structure of the utility model is faster in the installation and removal of the drill bit. The utility model solves the problem that on the current benchtop drilling machine, when installing or removing the drill bit, a special screwdriver is needed to tighten or loosen the screws, and the operation process is cumbersome.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling machines, and in particular relates to a drill bit conversion component for a table type drilling machine. Background Art

[0002] A benchtop drilling machine refers to a small drilling machine that can be placed on a workbench with a vertically arranged spindle. The drilling capacity of a benchtop drilling machine is generally 13 to 25 mm. The benchtop drilling machine is mainly used for drilling, reaming, boring, tapping, and scraping surfaces for small and medium-sized parts. It is used in machining workshops and mold repair workshops. Compared with similar machine tools at home and abroad, it has the characteristics of low horsepower, high rigidity, high precision, good rigidity, easy operation, and easy maintenance.

[0003] The drill bit on the benchtop drilling machine is inserted into the drill bit fixing seat and fastened by screws. In order to meet the drilling work of different hole diameters, the drill bit of the benchtop drilling machine can be replaced. Each time the drill bit is replaced, a special screwdriver is needed to loosen the screws in the fixing seat so that the drill bit can move, and then the drill bit can be removed and replaced with a new one. Similarly, the installation of a new drill bit also requires the use of a screwdriver to re-fix and lock the drill bit. And when installing the drill bit in the fixing seat, it is also necessary to find the installation direction and insert the drill bit into the fixing seat so that the screws can tighten the drill bit. Utility Model Content

[0004] The utility model provides a drill bit conversion assembly for a benchtop drilling machine, in which the structure of fixing the drill bit with a traditional screw is improved to be fixed with a bolt rod; the bolt rod is inserted from the drill bit clamp seat and fixed in the bolt hole of the drill bit fixing rod; an elastic member is arranged on the bolt rod; the end of the bolt rod can automatically enter the bolt hole under the action of the elastic member and keep the bolt rod fixed; under the limiting action of the bolt rod, the drill bit is fixed in the clamp seat and can rotate with the clamp seat to achieve the drilling operation. To remove the drill bit, it is only necessary to pull the bolt rod outward so that the end of the bolt rod leaves the bolt hole and the drill bit can be taken out; compared with screw-tightening the drill bit, the structure of the utility model is faster in the installation and removal of the drill bit. The utility model solves the problem that on the current benchtop drilling machine, when installing or removing the drill bit, a special screwdriver is required to tighten or loosen the screw, and the operation process is cumbersome.

[0005] In order to achieve the above technical objectives, the utility model is implemented through the following technical solutions:

[0006] A drill bit conversion assembly for a benchtop drilling machine includes: a clamping seat 1, a clamping seat 2, a drill bit fixing rod, a drill bit, a bolt rod, and an elastic member;

[0007] A second clamping seat is arranged at a central position below the first clamping seat;

[0008] A drill bit is arranged below the drill bit fixing rod;

[0009] A drill bit fixing rod channel is vertically provided in the center of the clamp seat 1 and the clamp seat 2, and the lower end of the drill bit fixing rod channel is open;

[0010] The drill bit fixing rod is detachably arranged in the drill bit fixing rod channel;

[0011] A bolt rod channel is horizontally provided in the center of the clamp seat 1 and the clamp seat 2, the bolt rod channel passes through the drill bit fixing rod channel, and both ends of the bolt rod channel are open structures;

[0012] The bolt rod is movably inserted into the bolt rod channel, one end of the bolt rod located in the channel is set as an inner end, and the inner end is detachably embedded in the side wall of the bolt rod;

[0013] An elastic member is sleeved on the outer side of the bolt rod outside the clamp seat; one end of the elastic member is arranged on the side wall of the clamp seat, and the other end is arranged on the side wall of the bolt rod; except for the end of the elastic member connected to the side wall of the bolt rod, the rest of the elastic member has no connection relationship with the bolt rod.

[0014] Preferably, a bolt hole is provided on the side wall of the drill bit fixing rod; the drill bit fixing rod is located in the drill bit fixing rod channel, and the inner end of the bolt rod is embedded in the bolt hole.

[0015] Preferably, when the elastic member does not undergo elastic deformation, the bolt rod is located at a position such that its inner end portion is embedded in the bolt hole.

[0016] Preferably, an automatic reset limit structure is symmetrically arranged inside the bolt rod;

[0017] The automatic reset limiting structure is used to pull the bolt rod outwards to keep the bolt rod fixed in position after the bolt rod end is separated from the bolt hole, so that the end of the bolt rod cannot be embedded in the bolt hole under the action of the elastic member.

[0018] Preferably, the automatic reset limit structure comprises: a limit pin and a pin reset elastic member;

[0019] The bolt rod is symmetrically provided with nail grooves;

[0020] A limiting nail is movably arranged in the nail groove;

[0021] A nail resetting elastic member is arranged between the limiting nail and the bottom of the nail groove;

[0022] The upper end of the nail resetting elastic member is arranged on the bottom surface of the limiting nail, and the lower end is arranged on the bottom of the nail groove.

[0023] Preferably, an embedded fixing structure is provided between the inner end of the bolt rod and the bolt hole; the embedded fixing structure is used to form a temporary connection structure between the inner end of the bolt rod and the bolt hole after the inner end of the bolt rod is embedded in the bolt hole, so as to prevent the inner end of the bolt rod from being separated from the bolt hole due to centrifugal action during the rotation of the clamp seat.

[0024] Preferably, the embedded fixing structure comprises: an electromagnet, a magnetic attraction sheet and an electromagnet wire;

[0025] The electromagnet is arranged on the inner end of the bolt rod; the magnetic attraction sheet is arranged on the inner bottom surface of the bolt hole;

[0026] The electromagnet lead is connected to the electromagnet and is led out from the inside of the bolt rod.

[0027] Preferably, a pressure sensor is provided at the top of the drill bit fixing rod channel, the pressure sensor is communicatively connected to a microprocessor, and the microprocessor is communicatively connected to a warning light.

[0028] Preferably, an indicator mark is provided on the side wall of the second clamping seat near the lower end; an indicator mark is also provided on the side wall of the drill bit fixing rod near the upper end;

[0029] Before installing the drill bit fixing rod in the drill bit fixing rod passage in the clamp seat, align the two indicator marks; in this way, when the drill bit fixing rod is installed in the drill bit fixing rod passage, the inner end of the bolt rod can be aligned with the bolt hole.

[0030] Preferably, a motor rotor docking end is centrally disposed at an upper end of the clamping seat; the motor rotor docking end is used to be connected to a motor, and the motor drives the clamping seat and the drill bit to rotate.

[0031] The beneficial effects of the utility model are:

[0032] The utility model provides a drill bit conversion assembly for a bench drilling machine, wherein a bolt rod channel is arranged in a clamp seat for clamping and fixing the drill bit fixing rod on the conversion assembly; a bolt rod can be movably inserted into the bolt rod channel, and the inner end of the bolt rod can be inserted into the bolt hole on the drill bit fixing rod; the purpose of fixing the drill bit fixing rod and the drill bit by the bolt rod is achieved through the cooperation between the inner end of the bolt rod and the bolt hole; an elastic member is arranged on the bolt rod located outside, and the elastic member keeps the inner end of the bolt rod in the bolt hole, and also prevents the bolt rod from escaping from the bolt rod channel; in this way, each time the drill bit is replaced, it is only necessary to pull the bolt rod outwards to separate the inner end of the bolt rod from the bolt hole, and the bolt rod can be removed; similarly, when the drill bit needs to be installed, it is only necessary to insert the drill bit fixing rod into the drill bit fixing rod channel, so that the inner end of the bolt rod is embedded in the bolt hole; based on the above structure, there is no need to use complicated screws to fix the drill bit, and the installation and removal of the drill bit are simpler and faster than the existing bench drilling machine.

[0033] The bolt rod of the utility model is provided with a limiting pin, and the bolt rod is pulled outward to make the inner end portion of the bolt rod disengage from the bolt hole. At this time, the limiting pin will move out of the bolt rod channel along with the bolt rod, and automatically pop out from the bolt rod and abut against the outer wall of the clamp seat, so that the bolt rod can maintain the current position unchanged even under the action of the elastic member; such a structure makes it convenient for the operator to disengage the inner end portions of the bolt rods from the bolt holes one by one, and keep the bolt rods in a position separated from the bolt holes unchanged, until the inner end portions of all the bolt rods are disengaged from the bolt holes, and then the drill bit can be disassembled.

[0034] The utility model provides an electromagnet at the inner end of the bolt rod, and a magnetic attraction sheet is provided at the inner bottom of the bolt hole. When the inner end of the bolt rod is embedded in the bolt hole, the attraction effect of the electromagnet and the magnetic attraction sheet is utilized to strengthen the embedding connection stability between the inner end of the bolt rod and the bolt hole. This prevents the clamp seat from rotating at high speed during the drilling process, and the inner end of the bolt rod from being separated from the bolt hole under the action of high-speed centrifugation, thereby affecting the installation stability of the drill bit.

[0035] The utility model arranges indicator marks on the outer wall of the clamp seat 2 and the outer wall of the drill fixing rod. It is only necessary to align the two indicator marks and then insert the drill fixing rod into the drill fixing rod channel along the direction. At this time, the inner end of the bolt rod is just aligned with the bolt hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0038] Figure 2 It is a schematic diagram of the structure in which the inner end of the bolt rod of the utility model is embedded in the bolt hole;

[0039] Figure 3 It is a schematic diagram of the positions of the bolt rod and the limit top when the elastic member on the bolt rod of the utility model has not undergone elastic deformation;

[0040] Figure 4 It is a structural schematic diagram of a bolt rod channel and a drill bit fixing rod channel provided in the clamp seat 1 and the clamp seat 2 of the utility model;

[0041] Figure 5 This is a schematic diagram of the bolt hole structure on the drill bit fixing rod of the utility model;

[0042] Figure 6 This is a schematic diagram of the indicator mark on the drill bit fixing rod of the utility model;

[0043] Figure 7 It is a schematic diagram of the structure of the bolt hole on the bolt rod and the magnetic attraction sheet arranged at the bottom of the bolt hole of the utility model;

[0044] Figure 8 It is a schematic diagram of the structure of the electromagnet arranged at the inner end of the bolt rod and the limit top arranged in the bolt rod in the pop-up state;

[0045] In the accompanying drawings, the structural names represented by the reference numerals are:

[0046] 1-clamp seat one, 101-pressure sensor, 2-clamp seat two, 201-indicator, 3-motor rotor docking end, 4-bolt rod, 401-bolt rod channel, 402-electromagnet, 403-electromagnet wire, 404-limiting nail, 405-nail reset elastic part, 5-elastic part, 6-drill bit fixing rod, 601-bolt hole, 6011-magnetic suction sheet, 602-drill bit fixing rod channel, 7-drill bit. DETAILED DESCRIPTION

[0047] 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 of 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.

[0048] Example 1

[0049] A drill bit conversion assembly for a benchtop drilling machine, comprising: a clamping seat 1, a clamping seat 2, a drill bit fixing rod 6, a drill bit 7, a bolt rod 4, and an elastic member 5;

[0050] like Figure 1 As shown, a motor rotor docking end 3 is arranged in the center of the upper end of the clamp seat 1; the motor rotor docking end 3 is used to connect to the motor, and the motor drives the clamp seat and the drill bit to rotate; a clamp seat 2 is arranged in the center below the clamp seat 1, and the centers of the clamp seat 1 and the clamp seat 2 are located on the same axis; Figure 4 As shown, a drill bit fixing rod channel 602 is vertically opened in the clamp seat 1 and the clamp seat 2, and the drill bit fixing rod channel 602 is set as a cylindrical structure, and the center axis of the drill bit fixing rod channel 602 coincides with the center axis of the clamp seat 1 and the clamp seat 2;

[0051] A drill bit 7 is arranged below the drill bit fixing rod 6, and the model of the drill bit 7 can be set to various types, but the model of the drill bit fixing rod 6 above remains unchanged regardless of how the model of the drill bit 7 changes; the outer diameter of the drill bit fixing rod 6 should be slightly smaller than the inner diameter of the drill bit fixing rod channel 602, that is, when the drill bit fixing rod 6 is inserted into the drill bit fixing rod channel 602, the outer wall of the drill bit fixing rod 6 can fit the inner wall of the drill bit fixing rod channel 602; in this way, the gap between the drill bit fixing rod 6 and the drill bit fixing rod channel 602 can be minimized.

[0052] like Figure 4 As shown, a bolt rod channel 401 is provided in the clamp seat 1 and the clamp seat 2, and the bolt rod channel 401 is arranged horizontally in the center relative to the clamp seat 1 and the clamp seat 2; the bolt rod channel 401 passes through the vertical drill bit fixing rod channel 602; both ends of the bolt rod channel 401 are arranged as opening structures, and the openings are arranged on the side walls of the clamp seat 1 and the clamp seat 2;

[0053] The bolt rod passages 401 on the clamp seat 1 and the clamp seat 2 are mirror-symmetrical with the drill bit fixing rod passage 602 as the axis;

[0054] A bolt rod 4 is inserted into each bolt rod channel 401, and one end of the bolt rod 4 located in the bolt rod channel 401 is set as the inner end; when the inner end of the bolt rod 4 reaches the drill bit fixing rod 6, a bolt hole 601 is opened at the position of the drill bit fixing rod 6 opposite to the inner end, and the bolt hole 601 is set as a cylindrical structure hole, and the inner diameter of the bolt hole 601 is slightly larger than the outer diameter of the bolt rod 4; in this way, the inner end of the bolt rod 4 is embedded in the bolt hole 601, and the bolt rod 4 and the drill bit fixing rod 6 are temporarily connected by utilizing the embedded connection relationship between the bolt hole 601 and the inner end; it is also because of this connection relationship that the drill bit fixing rod 6 and the drill bit 7 below are installed and fixed, and can rotate together with the clamping seat 1 and the clamping seat 2.

[0055] Although the inner end of the bolt rod 4 is embedded in the bolt hole 601, there is no connection or limit structure between the bolt rod 4 and the clamp seat; when the external force is too large, it may be separated from the bolt rod channel 401;

[0056] like Figure 2As shown, an elastic member 5 is sleeved on the outer side of the bolt rod 4 and at the part of the bolt rod 4 located outside the clamp seat. The elastic member 5 here is a spring that meets the elastic coefficient requirements; one end of the elastic member 5 is fixedly connected to the side wall of the clamp seat, and the other end is fixedly connected to the outer wall of the bolt rod 4; when the elastic member 5 does not undergo any elastic deformation, the inner end portion of the bolt rod 4 is just embedded in the bolt hole 601, and the inner end portion of the bolt rod 4 is tightly attached to the bottom of the bolt hole 601; and it is precisely because of the existence of the elastic member 5 that the bolt rod 4 will not move easily, and the inner end portion of the bolt rod 4 will not easily detach from the bolt hole 601; during the rotation of the clamp seat and the drill bit 7, the bolt rod 4 will not move under the action of rotational centrifugal force or external force, and even cause the inner end portion to detach from the bolt hole 601; and in order to meet the above situation, it is necessary to select an elastic member with an elastic coefficient that meets the requirements.

[0057] When installing the drill bit 7, it is necessary to insert the drill bit fixing rod 6 into the drill bit fixing rod channel 602. During the insertion process, it is necessary to pull the bolt rod 4 outwards one by one. When the bolt rod 4 is pulled outwards, the elastic member 5 is deformed. When the inner end of the bolt rod 4 is aligned with the bolt hole 601, the bolt rod 4 is released. At this time, the inner end of the bolt rod 4 will automatically embed into the bolt hole 601 under the action of the deformation restoring force of the elastic member 5; when all the inner ends of the bolt rods are embedded in the corresponding bolt holes 601, the drill bit fixing rod 6 and the drill bit 7 are installed. When the drill bit 7 needs to be removed, the bolt rod 4 is pulled outwards accordingly to make the inner end of the bolt rod disengage from the bolt hole 601. After the inner ends of all the bolt rods are disengaged from the bolt holes 601, the drill bit 7 can be removed.

[0058] Example 2

[0059] Based on Example 1, in Example 1, when installing the drill bit 7 or removing the drill bit 7, it is necessary to pull the bolt rod 4 outward so that the drill fixing rod 6 can be smoothly inserted into the drill fixing rod channel 602; or the inner end of the bolt rod 4 is disengaged from the bolt hole 601, and the drill fixing rod 6 can be smoothly taken out of the drill fixing rod channel 602, that is, the four bolt rods 4 must be pulled outward at the same time to achieve the above situation; this may require the cooperation of at least two people.

[0060] As a preferred embodiment, Figure 8 As shown, in this embodiment, an automatic reset limit structure is symmetrically arranged in the bolt rod 4; the automatic reset limit structure is used to pull the bolt rod 4 outward so that the end of the bolt rod is disengaged from the bolt hole 601, and then keep the position of the bolt rod 4 fixed so that the end of the bolt rod cannot be embedded in the bolt hole 601 under the elastic deformation recovery force of the elastic member 5.

[0061] In this way, only one person is needed to pull out the bolt rods 4 one by one, so that the inner ends are separated from the bolt holes 601 and the current positions of the bolt rods 4 are kept unchanged; after the inner end of the last bolt rod is separated from the bolt hole 601, the drill fixing rod 6 can be taken out; or the bolt rods 4 can be pulled out one by one and the positions of all the bolt rods 4 are limited and maintained, so that the drill fixing rod 6 can be inserted into the drill fixing rod channel 602.

[0062] The above-mentioned automatic reset limit structure includes: a limit pin 404 and a nail reset elastic member 405; a nail groove is symmetrically provided on the bolt rod 4; the limit pin 404 is movably arranged in the nail groove; a nail reset elastic member 405 is arranged between the limit pin 404 and the bottom of the nail groove; the upper end of the nail reset elastic member 405 is arranged on the bottom surface of the limit pin 404, and the lower end is arranged at the bottom of the nail groove.

[0063] like Figure 2 and Figure 3 As shown, when the inner end of the bolt rod 4 is embedded in the bolt hole 601 or the elastic member 5 does not undergo elastic deformation, the limiting pin 404 is pressed into the pin groove by the bolt rod channel 401; when the bolt rod 4 is pulled outward, at the moment when the inner end of the bolt rod is separated from the bolt hole 601, the limiting pin 404 is not restricted by the bolt rod channel 401, pops out from the pin groove, and abuts against the outer wall of the clamp seat; in this way, with the limiting effect of the limiting pin 404, the bolt rod 4 will no longer move in the direction of the drill fixing rod channel 602.

[0064] Example 3

[0065] Based on the first embodiment, the inner end of the bolt rod 4 is embedded in the bolt hole 601, and there is no connection structure with the bolt hole 601; although the elastic member 5 can prevent the bolt rod 4 from shifting during the rotation of the clamping seat; however, in order to further ensure that during the rotation of the clamping seat, there will be no significant position shift between the bolt rod 5 and the drill fixing rod 6;

[0066] like Figure 3 As shown, an electromagnet 402 is provided on the inner end of the bolt rod 4, and a magnetic attraction sheet 6011 is provided on the inner bottom surface of the bolt hole 601 correspondingly; an electromagnet wire 403 is connected to the electromagnet 402, and the electromagnet wire 403 is led out from the inside of the bolt rod 4; in this way, when the inner end of the bolt rod 4 is embedded in the bolt hole 601, and the inner end is close to the inner bottom surface of the bolt hole 601, the electromagnet 402 is energized to cause magnetic attraction with the magnetic attraction sheet 6011; this is equivalent to a secondary fixed connection between the bolt rod 4 and the drill bit fixing rod 6; it can further ensure that during the rotation of the clamp seat, the bolt rod 4 will not be displaced under the action of high-speed rotation centrifugal force.

[0067] Example 4

[0068] Based on the first embodiment, since the inner end of the bolt rod 4 has a bolt hole 601 corresponding thereto, when inserting the drill fixing rod 6 into the drill fixing rod channel 602, it is necessary to find the correct position so that the inner end of the bolt rod can be aligned with the bolt hole 601;

[0069] In order to quickly find the correct insertion direction, such as Figure 1 and Figure 6 As shown, an indicator mark 201 is provided on the side wall of the clamp seat 2 near the lower end; an indicator mark 201 is also provided on the side wall of the drill bit fixing rod 6 near the upper end;

[0070] Before installing the drill fixing rod 6 in the drill fixing rod channel 602 in the clamp, align the two indicators 201; in this way, when the drill fixing rod 6 is installed in the drill fixing rod channel 602, the inner end of the bolt rod 4 can be aligned with the bolt hole 601.

[0071] Example 5

[0072] Based on Example 1, when the drill bit fixing rod 6 is installed in the correct position, the upper end surface of the drill bit fixing rod 6 should be against the top surface of the drill bit fixing rod channel 602; however, the drill bit fixing rod 6 is located inside the drill bit fixing rod channel 602 and cannot be observed;

[0073] So, if Figure 3 As shown, a pressure sensor 101 is arranged at the top of the drill bit fixing rod channel 602, and the pressure sensor 101 is connected to the microprocessor in communication, and the microprocessor is connected to the warning light (not shown in the figure). When the drill bit fixing rod 6 is installed in place, and the top of the drill bit fixing rod 6 abuts against the top surface of the drill bit fixing rod channel 602, a pressure effect is generated on the pressure sensor 101, and the pressure sensor 101 feeds the sensing signal to the microprocessor. After receiving the sensing signal, the microprocessor sends a control instruction to the warning light, causing the warning light to flash, proving that the drill bit fixing rod 6 is installed in place.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A drill bit conversion assembly for a benchtop drilling machine, characterized in that: include: Clamp seat 1, clamp seat 2, drill bit fixing rod, drill bit, bolt rod, elastic part; A second clamping seat is arranged at a central position below the first clamping seat; A drill bit is arranged below the drill bit fixing rod; A drill bit fixing rod channel is vertically provided in the center of the clamp seat 1 and the clamp seat 2, and the lower end of the drill bit fixing rod channel is open; The drill bit fixing rod is detachably arranged in the drill bit fixing rod channel; A bolt rod channel is horizontally provided in the center of the clamp seat 1 and the clamp seat 2, the bolt rod channel passes through the drill bit fixing rod channel, and both ends of the bolt rod channel are open structures; The bolt rod is movably inserted into the bolt rod channel, one end of the bolt rod located in the channel is set as an inner end, and the inner end is detachably embedded in the side wall of the bolt rod; An elastic member is sleeved on the outer side of the bolt rod outside the clamp seat; one end of the elastic member is arranged on the side wall of the clamp seat, and the other end is arranged on the side wall of the bolt rod; except for the end of the elastic member connected to the side wall of the bolt rod, the rest of the elastic member has no connection relationship with the bolt rod.

2. The drill bit conversion assembly for a benchtop drilling machine according to claim 1, characterized in that: A bolt hole is arranged on the side wall of the drill bit fixing rod; the drill bit fixing rod is located in the drill bit fixing rod channel, and the inner end of the bolt rod is embedded in the bolt hole.

3. The drill bit conversion assembly for a benchtop drilling machine according to claim 1, characterized in that: When the elastic member does not undergo elastic deformation, the bolt rod is located at a position such that its inner end portion is embedded in the bolt hole.

4. The drill bit conversion assembly for a benchtop drilling machine according to claim 1, characterized in that: An automatic reset limit structure is symmetrically arranged inside the bolt rod; The automatic reset limiting structure is used to pull the bolt rod outwards to keep the bolt rod fixed in position after the bolt rod end is separated from the bolt hole, so that the end of the bolt rod cannot be embedded in the bolt hole under the action of the elastic member.

5. A drill bit conversion assembly for a benchtop drilling machine according to claim 4, characterized in that: The automatic reset limit structure comprises: a limit pin and a pin reset elastic member; The bolt rod is symmetrically provided with nail grooves; A limiting nail is movably arranged in the nail groove; A nail resetting elastic member is arranged between the limiting nail and the bottom of the nail groove; The upper end of the nail resetting elastic member is arranged on the bottom surface of the limiting nail, and the lower end is arranged on the bottom of the nail groove.

6. The drill bit conversion assembly for a benchtop drilling machine according to claim 2, characterized in that: An embedded fixing structure is arranged between the inner end of the bolt rod and the bolt hole; the embedded fixing structure is used to form a temporary connection structure between the inner end of the bolt rod and the bolt hole after the inner end of the bolt rod is embedded in the bolt hole.

7. A drill bit conversion assembly for a benchtop drilling machine according to claim 6, characterized in that: The embedded fixed structure includes: an electromagnet, a magnetic attraction sheet and an electromagnet wire; The electromagnet is arranged on the inner end of the bolt rod; the magnetic attraction sheet is arranged on the inner bottom surface of the bolt hole; The electromagnet lead is connected to the electromagnet and is led out from the inside of the bolt rod.

8. The drill bit conversion assembly for a benchtop drilling machine according to claim 1, characterized in that: A pressure sensor is arranged at the top of the drill bit fixing rod channel, the pressure sensor is communicatively connected to a microprocessor, and the microprocessor is communicatively connected to a warning light.

9. The drill bit conversion assembly for a benchtop drilling machine according to claim 1, characterized in that: An indicator mark is arranged on the side wall of the second clamp seat close to the lower end; an indicator mark is also arranged on the side wall of the drill bit fixing rod close to the upper end.

10. The drill bit conversion assembly for a benchtop drilling machine according to claim 1, characterized in that: A motor rotor docking end is centrally disposed at an upper end of the clamp seat; the motor rotor docking end is used to be connected to the motor.

Images