CN216801828U - Adjustable drill bushing - Google Patents

Abstract

The utility model discloses an adjustable drill sleeve, which comprises a drill sleeve body and an adjustment support assembly, wherein a plurality of the adjustment support assemblies are arranged, and the plurality of adjustment support assemblies are evenly arranged at the bottom end of the drill sleeve body. The adjustment support assembly includes an extension sleeve, a rack, a planetary gear self-locking transmission device and a support base; the extension sleeve is arranged on the outer side of the bottom end of the drill sleeve body, and there is a chute along the vertical direction on the extension sleeve. The rack is slid into the chute along the vertical direction; when drilling, just insert and lock it into the corresponding hole on the drilling template, and the rack and pinion mechanism configured on the drill sleeve can freely adjust the extension length of the support feet , and the applied planetary gear self-locking transmission device can make the rack and pinion mechanism realize self-locking at any position, so as to achieve stable placement on the workpiece to be processed, and the drill sleeve can guide the drill bit to complete the porous surface on the uneven surface. Drilling.

Description

An adjustable drill sleeve

technical field

The utility model relates to the field of mechanical processing, in particular to an adjustable drill sleeve.

Background technique

Drilling holes on the surface of rough parts such as large casting shells is not conducive to scribing and other operations due to the rough surface, and the structure of the porous drill mold is complex. When using traditional drill sleeves for drilling operations, due to the uneven bottom of the workpiece, It is difficult to stably support and fix it on the surface of the workpiece, thereby affecting the smooth progress of the drilling operation.

Therefore, how to solve the above-mentioned deficiencies in the prior art is the research subject of the present utility model.

SUMMARY OF THE INVENTION

In order to solve the above problems, the utility model discloses an adjustable drill sleeve.

In order to achieve the above purpose, the present utility model provides the following technical solutions: an adjustable drill sleeve, comprising a drill sleeve body and an adjustment support assembly, the adjustment support assemblies are provided with multiple, and the multiple adjustment support assemblies are evenly arranged on the drill sleeve the bottom end of the body, the adjustment support assembly includes an extension sleeve, a rack, a planetary gear self-locking transmission device and a support base;

The extension sleeve is arranged on the outer side of the bottom end of the drill sleeve body, the extension sleeve is provided with a chute along the vertical direction, the rack is slidably inserted into the chute, and the planetary gear self-locking transmission device is installed on the extension sleeve. The outer side of the sleeve, and the output shaft end of the planetary gear self-locking transmission device is drivingly connected with a driving gear that meshes with the rack, and the bottom end of the rack extends downward from the extension sleeve and is connected with the support base, so An elastic body is disposed between the drill sleeve body and the support base, and both ends of the elastic body act on the bottom surface of the drill sleeve body 100 and the top surface of the support base respectively.

In the above solution, a pawl damping plate corresponding to the teeth of the rack is slidably arranged in the extension sleeve, and the pawl damping plate is formed with a plurality of positions opposite to the teeth of the rack along the vertical direction. The matching blocking strip, the outer end of the pawl damping plate is rotatably connected with a screw rod, the extension sleeve is provided with a side plate corresponding to the outer side of the pawl damping plate, and the outer end of the screw rod passes through the side plate and passes through the thread with it. Cooperate.

In the above solution, the elastic body includes a sliding column and a spring sleeved on the sliding column. The two ends act on the bottom surface of the drill sleeve body and the top surface of the support base respectively.

In the above solution, three adjustment support assemblies are provided, and the three adjustment support assemblies are arranged in a ring shape at the bottom end of the drill sleeve body.

In the above solution, the extension sleeve is slidably connected to an annular slide rail fixed on the outer side of the bottom end of the drill sleeve body, and the extension sleeve and the annular slide rail are locked and fixed by screws.

Compared with the prior art, the present invention has the following advantages: the drill sleeve of the present invention includes a drill sleeve body and an adjustment support assembly, and a plurality of adjustment support assemblies are provided. When drilling, it only needs to be inserted and locked on the drill template. In the corresponding holes on the drill sleeve, the rack and pinion mechanism configured on the drill sleeve can adjust the extension length of the support feet at will, and the applied planetary gear self-locking transmission device can make the rack and pinion mechanism self-lock at any position, so as to realize the Stable placement on the workpiece to be machined, the drill sleeve can guide the drill bit to complete the porous drilling process on the uneven surface.

Description of drawings

Fig. 1 is the top view of the utility model;

Figure 2 is a cross-sectional view of a drill sleeve body and one of the adjustment support assemblies;

FIG. 3 is a partial enlarged view of part A in FIG. 2 .

Detailed ways

The present invention will be further clarified below in conjunction with the specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" ” refer to directions towards or away from the geometric center of a particular part, respectively.

Example: Referring to Figures 1-3, an adjustable drill sleeve can be used in conjunction with a drill template. The drill template corresponding to the workpiece to be drilled is provided with an opening for matching with it, and it includes a drill sleeve body. 100 and an adjustment support assembly 200, the adjustment support assembly 200 is provided with a plurality of, the multiple adjustment support assemblies 200 are evenly arranged at the bottom end of the drill sleeve body 100, the adjustment support assembly 200 comprises an extension sleeve 201, a rack 202. The planetary gear self-locking transmission device 203 and the support base 204; wherein the planetary gear self-locking transmission device 203 is an existing device in the field, which has self-locking characteristics, and the planetary wheel self-locking transmission device 203 is provided with a power output shaft and a power input In the working state, the power input shaft of the planetary gear self-locking transmission device 203 can be connected with the motor in a transmission phase;

The extension sleeve 201 is arranged on the outer side of the bottom end of the drill sleeve body 100 , the extension sleeve 201 is provided with a chute along the vertical direction, the rack 202 is slidably inserted into the chute, and the planetary gear is self-locking for transmission The device 203 is installed on the outside of the extension sleeve 201, and the output shaft end of the planetary wheel self-locking transmission device 203 is drivingly connected with a drive gear 231 that meshes with the rack 202, and is driven by the rotation of the output shaft end of the planetary wheel self-locking transmission device 203. The rack 202 rotates to realize the lifting and lowering of the rack 202;

The bottom end of the rack 202 protrudes downward from the extension sleeve 201 and is connected to the support base 204 . An elastic body 205 is disposed between the drill sleeve body 100 and the support base 204 , and two ends of the elastic body 205 are provided. respectively act on the bottom surface of the drill sleeve body 100 and the top surface of the support base 204; specifically, the elastic body 205 includes a sliding column and a spring sleeved on the sliding column, and the two ends of the sliding column are respectively slidably inserted In the bottom end of the drill sleeve body 100 and the top end of the support base 204, both ends of the spring act on the bottom surface of the drill sleeve body 100 and the top surface of the support base 204 respectively; the elastic body 205 can play an elastic supporting role, buffer the force between the drill sleeve body 100 and the support base 204;

When drilling, the drill sleeve body 100 is aligned and placed under the drill template, and the adjustment support assembly 200 of the drill sleeve body 100 is placed on the workpiece to be processed. The rotation of the shaft end drives the rack 202 to rotate, so that the rack 202 drives the support base 204 to lift up and down against the surface of the workpiece to form support for it. The applied planetary gear self-locking transmission device 203 can make the rack and pinion mechanism realize automatic The lock is used to achieve stable placement on the workpiece to be processed, and the drill sleeve can guide the drill bit to complete the porous drilling process on the uneven surface.

In order to further improve the support stability of the rack 202, a pawl damping plate 206 is slidably arranged in the extension sleeve 201 corresponding to the teeth of the rack 202, and the pawl damping plate 206 is formed along the vertical direction. There are a plurality of blocking bars which are matched with the teeth of the rack 202 in opposite positions, the outer end of the pawl damping plate 206 is rotatably connected with a screw 207, and the extension sleeve 201 is provided with a side corresponding to the outer side of the pawl damping plate 206 plate 208, the outer end of the screw rod 207 passes through the side plate 208 and is threaded with it. By rotating the screw rod 207, the pawl damping plate 206 is pressed against the rack 202, and the blocking bar on the pawl damping plate 206 Further blocking and limiting can be formed on the tooth portion of the rack 202 to make it more reliable.

There are three adjusting support assemblies 200 , and the three adjusting support assemblies 200 are arranged in a ring shape at the bottom end of the drill sleeve body 100 , and can form a stable support for the drill sleeve body 100 .

The extension sleeve 201 is slidably connected to an annular slide rail fixed on the outer side of the bottom end of the drill sleeve body 100. The extension sleeve 201 and the annular slide rail are locked and fixed by screws, and the extension sleeve 201 can be slidably adjusted on the annular slide rail. position to adjust its support installation position.

The technical means disclosed by the solution of the present invention are not limited to the technical means disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims (5)

1. An adjustable drill sleeve, characterized in that it comprises a drill sleeve body (100) and an adjustment support assembly (200), wherein the adjustment support assembly (200) is provided with a plurality of adjustment support assemblies (200) Evenly arranged on the bottom end of the drill sleeve body (100), the adjustment support assembly (200) includes an extension sleeve (201), a rack (202), a planetary self-locking transmission device (203) and a support base (204) ; The extension sleeve (201) is arranged on the outer side of the bottom end of the drill sleeve body (100), the extension sleeve (201) is provided with a chute along the vertical direction, and the rack (202) is slidably inserted into the chute , the planetary wheel self-locking transmission device (203) is installed on the outside of the extension sleeve (201), and the output shaft end of the planetary wheel self-locking transmission device (203) is drivingly connected with a drive gear that meshes with the rack (202). (231), the bottom end of the rack (202) protrudes downward from the extension sleeve (201) and is connected with the support base (204), the drill sleeve body (100) and the support base (204) are connected. An elastic body (205) is arranged therebetween, and both ends of the elastic body (205) act on the bottom surface of the drill sleeve body (100) and the top surface of the support base (204) respectively. 2. An adjustable drill sleeve according to claim 1, characterized in that: a pawl damping plate ( 206), the pawl damping plate (206) is vertically formed with a plurality of blocking bars which are matched with the teeth of the rack (202) in relative position, and the outer end of the pawl damping plate (206) is rotatably connected There is a screw (207), a side plate (208) is provided on the outer side of the extension sleeve (201) corresponding to the pawl damping plate (206), and the outer end of the screw (207) passes through the side plate (208) and is connected with the side plate (208). Fitted by thread. 3 . The adjustable drill bush according to claim 1 , wherein the elastic body ( 205 ) comprises a sliding column and a spring sleeved on the sliding column, and two ends of the sliding column slide respectively. 4 . Inserted into the bottom end of the drill sleeve body (100) and the top end of the support base (204), the two ends of the spring act respectively on the bottom surface of the drill sleeve body (100) and the top surface of the support base (204). 4. An adjustable drill sleeve according to claim 1, characterized in that: three adjustment support assemblies (200) are provided, and the three adjustment support assemblies (200) are arranged in a ring shape on the drill sleeve body (200). 100) at the bottom end. 5. An adjustable drill sleeve according to claim 1, characterized in that: the extension sleeve (201) is slidably connected to an annular slide rail fixed on the outer side of the bottom end of the drill sleeve body (100), and the extension sleeve (201) and the annular slide rail are locked and fixed by screws.

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