A handheld electric concentric reaming device

Abstract

The present invention provides a handheld electric concentric reaming device, comprising an outer sleeve body, an axial feed mechanism, a guide rod mechanism and a reamer mechanism; the axial feed mechanism is connected to the reamer mechanism, the axial feed mechanism is assembled in the outer sleeve body, and the axial feed mechanism can move axially along the outer sleeve body, and at the same time drive the reamer mechanism to rotate to realize the reaming operation; the guide rod mechanism is assembled at one end of the outer sleeve body away from the reamer mechanism, and the guide rod mechanism is coaxially arranged with the reamer mechanism. The handheld electric concentric reaming device provided by the present invention can ream the bearing holes on both sides of the box body and realize the concentricity of the bearing holes, and can obtain good joint processing quality, and has the advantages of high processing accuracy and high efficiency, and can also shorten the processing time and reduce the labor intensity.

Description

Technical Field

[0001] The invention belongs to the technical field of box bearing hole processing, and in particular relates to a handheld electric concentric reaming device. Background Art

[0002] In the field of mechanical manufacturing equipment, there is a demand for processing the bearing holes on both sides of the box, and the reaming process can only be performed from the inside of the box. At the same time, there are requirements for the concentricity, hole diameter and inner surface roughness of the holes on both sides. At present, the reaming process of the holes on both sides of the box in China is still done by manual reaming. Manual reaming mainly has two problems: uneven tool cutting speed and difficult to control tool feed rate. Uneven reaming speed may cause chips to be squeezed between the reamer and the hole wall, squeezing the hole wall; uneven tool feed force will cause uneven knife marks on the hole wall. The above two factors directly make it difficult to control the inner surface roughness of the hole, and the processing quality of the hole depends on the technical level of the workers; and manual reaming is inefficient and labor-intensive. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a device for reaming the bearing holes on both sides of a box body and requiring them to be concentric.

[0004] The present invention is specifically implemented through the following technical solutions:

[0005] Provided is a handheld electric concentric reaming device, comprising: an outer sleeve body, an axial feeding mechanism, a guide rod mechanism and a reamer mechanism;

[0006] The axial feeding mechanism is connected to the reamer mechanism, the axial feeding mechanism is assembled in the outer sleeve body, and the axial feeding mechanism can move axially along the outer sleeve body, and at the same time drive the reamer mechanism to rotate to realize the reaming operation;

[0007] The guide rod mechanism is assembled on one end of the outer sleeve body away from the reamer mechanism, and the guide rod mechanism is coaxially arranged with the reamer mechanism.

[0008] As a further description of the present invention, the outer sleeve body includes a sleeve, a lead screw nut is fixedly connected inside the sleeve, and the lead screw nut and the axial feed mechanism form a transmission pair.

[0009] As a further explanation of the present invention, the axial feed mechanism includes a trapezoidal screw, bearings are installed at both ends of the trapezoidal screw, the bearings are installed in a bearing seat, the bearing seat can slide axially along the sleeve, and the shaft head of the trapezoidal screw head is connected to the reamer mechanism.

[0010] As a further description of the present invention, the axial feed mechanism also includes a reducer and a servo motor; the tail shaft head of the trapezoidal screw is connected to the reducer output shaft through a coupling, and the reducer input shaft is connected to the servo motor output shaft.

[0011] As a further explanation of the present invention, the bearing and the bearing seat are connected to two first guide flat keys at the top and bottom, and a slide groove is provided at the top and bottom of the inner cylindrical surface of the sleeve. The first guide flat key is installed in the corresponding slide groove and can move axially.

[0012] As a further description of the present invention, the screw nut is connected to two second guide flat keys at the top and bottom, and the second guide flat keys are installed in the corresponding sliding grooves and can move axially.

[0013] As a further explanation of the present invention, the bearing seat away from one end of the reamer mechanism is connected to the reducer through a connecting sleeve, and the connecting sleeve is connected to two third guide keys at the top and bottom. The third guide keys are installed in the corresponding slide grooves and can move axially.

[0014] As a further explanation of the present invention, a step surface is radially arranged in an inner cross section of the sleeve to divide the cross-sectional area of ​​the sleeve into two parts, and the end face of the lead screw nut rests on the step surface.

[0015] As a further description of the present invention, the guide rod mechanism includes a guide rod and a expansion sleeve, the shaft head of the guide rod cooperates with the expansion sleeve, and the other connecting end of the guide rod is connected to the outer sleeve body.

[0016] As a further description of the present invention, an end of the outer sleeve body away from the reamer mechanism is provided with an inner conical surface, and a connecting end of the guide rod mechanism is provided with an outer conical surface, and the inner conical surface and the outer conical surface are assembled together.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The handheld electric concentric reaming device provided by the present invention can ream the bearing holes on both sides of the box body and achieve the concentricity of the bearing holes. While obtaining good joint processing quality, the device has the advantages of high processing accuracy and high efficiency, and can also shorten the processing time and reduce manual labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the handheld electric concentric reaming device provided by the present invention.

[0020] Figure 2 The utility model is a cross-sectional view of the overall structure of the handheld electric concentric reaming device provided by the present invention.

[0021] Figure 3 The present invention is a schematic diagram of the outer sleeve structure of the handheld electric concentric reaming device provided by the present invention.

[0022] Figure 4 The present invention provides a schematic diagram of the structure of the axial feed mechanism of the handheld electric concentric reaming device.

[0023] Figure 5 The present invention is a schematic diagram of the guide rod mechanism structure of the handheld electric concentric reaming device provided by the present invention.

[0024] Reference numerals:

[0025] Outer sleeve body 1, sleeve 101, lead screw nut 102, slide groove 103, wire guide groove 104, step surface 105;

[0026] Axial feeding mechanism 2, trapezoidal screw 201, bearing seat 202, first guide flat key 203, coupling 204, reducer 205, connecting sleeve 206, connecting shaft 207, connecting flange 208, servo motor 209;

[0027] Guide rod mechanism 3, guide rod 301, expansion sleeve 302;

[0028] Reamer mechanism 4, tool rod 401, reamer 402. Implementation

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0030] The technical solution of the present invention will be explained below in conjunction with specific embodiments.

[0031] like Figure 1 and 2 As shown, a handheld electric concentric reaming device is provided, comprising: an outer sleeve body 1, an axial feeding mechanism 2, a guide rod mechanism 3 and a reamer mechanism 4;

[0032] The axial feed mechanism 2 is connected to the reamer mechanism 4. The axial feed mechanism 2 is assembled in the outer sleeve body 1. The axial feed mechanism 2 can move axially along the outer sleeve body 1 and drive the reamer mechanism 4 to rotate to realize the reaming operation.

[0033] The guide rod mechanism 3 is assembled on one end of the outer sleeve body 1 away from the reamer mechanism 4 , and the guide rod mechanism 3 and the reamer mechanism 4 are coaxially arranged.

[0034] The handheld electric concentric reaming device provided by the present invention can ream the bearing holes on both sides of the box body and achieve the concentricity of the bearing holes. While obtaining good joint processing quality, the device has the advantages of high processing accuracy and high efficiency, and can also shorten the processing time and reduce manual labor intensity.

[0035] In one achievable manner, Figure 2 and 3 As shown, the outer sleeve body 1 includes a sleeve 101 , in which a lead screw nut 102 is fixedly connected, and the lead screw nut 102 and the axial feeding mechanism 2 form a transmission pair.

[0036] like Figure 2 and 4 As shown, the axial feed mechanism 2 includes a trapezoidal screw 201, bearings are installed at both ends of the trapezoidal screw 201, and the bearings are installed in the bearing seat 202. Specifically, the head bearing of the trapezoidal screw 201 uses a round nut and a shoulder to fix the inner ring of the bearing, and the bearing seat 202 and a bearing cover are used to fix the outer ring of the bearing. The tail bearing of the trapezoidal screw 201 uses a round nut and a shoulder to fix the inner ring of the bearing, and the bearing seat 202 and a connecting sleeve 206 are used to fix the outer ring of the bearing.

[0037] The bearing seat 202 can slide axially along the sleeve 101. Specifically, the bearing and the bearing seat 202 are connected with two first guide flat keys 203 at the top and bottom, and a slide groove 103 is provided at the top and bottom of the inner cylindrical surface of the sleeve 101. The first guide flat key 203 is installed in the corresponding slide groove 103 and can move axially. More specifically, key grooves can be cut at the top and bottom of the bearing seat 202, the first guide flat key 203 is fixedly connected, and the protruding part of the first guide flat key 203 is placed in the slide groove 103 to achieve a sliding fit connection.

[0038] Further, such as Figure 2 and 4 As shown, the axial feed mechanism 2 also includes a reducer 205 and a servo motor 209; the tail shaft head of the trapezoidal lead screw 201 is connected to the output shaft of the reducer 205 through a coupling 204. Specifically, the bearing seat 202 at one end away from the reamer mechanism 4 is connected to the reducer 205 through a connecting sleeve 206. The connecting sleeve 206 is connected to two third guide flat keys at the top and bottom, and the third guide flat keys are installed in the corresponding slide groove 103 and can move axially. More specifically, key grooves can be cut at the top and bottom of the connecting sleeve 206, and the third guide flat keys are fixedly connected, and the protruding part of the third guide flat key is placed in the slide groove 103 to achieve a sliding fit connection.

[0039] The input shaft of the reducer 205 is connected to the output shaft of the servo motor 209, and the servo motor 209 provides rotational power for the trapezoidal screw 201. Specifically, the reducer 205 and the servo motor 209 are connected via a connecting shaft 207, and power is transmitted via the connecting shaft 207. At the same time, the servo motor 209 is connected to the end face of the reducer 205 via a connecting flange 208.

[0040] In one feasible manner, the screw nut 102 is connected to two second guide flat keys at the top and bottom, and the second guide flat keys are installed in the corresponding slide grooves 103 and can move axially. Specifically, key grooves can be cut at the top and bottom of the screw nut 102, and the second guide flat keys can be fixedly connected, and the protruding parts of the second guide flat keys are placed in the slide grooves to achieve a sliding fit connection. A step surface 105 is radially arranged at a cross section at a suitable size position inside the sleeve 101, and the cross-sectional area of ​​the sleeve is divided into two parts. The end face of the screw nut 102 rests on the step surface 105, so that the screw nut 102 is better stressed during reaming. Four threaded holes are evenly drilled in the circumference of the screw nut 102 at the corresponding positions of the sleeve 101, and the screw nut 102 and the sleeve 101 are fixed together by screws.

[0041] In one achievable manner, Figure 1 As shown, the sleeve 101 has two lead-in grooves 104 cut out at positions corresponding to the internal servo motor 209 to lead out the motor wires and achieve a weight-reducing effect.

[0042] like Figure 2 and 4 As shown, the head shaft head of the trapezoidal screw 201 is connected to the reamer mechanism 4. Specifically, the head shaft head of the trapezoidal screw 201 is connected to the tool rod 401, and the reamer 402 is assembled on the tool rod 401 through a pin connection.

[0043] In one achievable manner, Figure 2 and 5 As shown, the guide rod mechanism 3 includes a guide rod 301 and a tightening sleeve 302, the shaft head of the guide rod 301 cooperates with the tightening sleeve 302, and the other connecting end of the guide rod is connected to the outer sleeve body 1. The outer sleeve body 1 is provided with an inner conical surface at one end away from the reamer mechanism 4, and the connecting end of the guide rod mechanism 3 is provided with an outer conical surface, and the inner conical surface and the outer conical surface are assembled together. In this way, the guide rod mechanism 3 at the rear of the device can be placed in an unprocessed hole for fixing, and the entire device can be more stable when the reamer at the head of the device processes the hole.

[0044] The use principle and method of the present invention are:

[0045] In a reaming process, the holes to be processed and the guide rod mounting holes are symmetrically distributed. After one process is completed, the holes to be processed in the previous process become the current guide rod mounting holes, and the guide rod mounting holes in the previous process become the current holes to be processed. This cycle continues until both holes are processed to the required accuracy.

[0046] In a reaming process, the equipment is first assembled, and the expansion sleeve 302 on the tail guide rod 301 is installed in the guide rod installation hole. The outer diameter of the expansion sleeve 302 has a certain range of variation. When the nut or screw is tightened, under the action of the axial force, the inner and outer sleeves are wedged against each other, the inner sleeve shrinks to clamp the shaft, and the outer sleeve expands to tighten the hole. In this way, the diameter of the guide rod installation hole that has undergone different processing can be handled, avoiding multiple assembly of guide rods with different diameters. The reamer 402 is aligned with the hole to be processed.

[0047] During operation, the servo motor 209 will have two speeds after being powered on. It will enter the processed hole at a low speed and then work at a high speed after entering. The trapezoidal screw 201 is driven to rotate by the reducer 205. Since the screw nut 102 is fixed, the bearing seat 202 can only move axially and cannot rotate. Then the trapezoidal screw 201 will rotate and move. At this time, the bearing seat 202 connected to the screw, the connecting sleeve 206 connecting the bearing seat 202 and the reducer 205, the reducer 205 and the servo motor 209 will all move forward axially, so the reamer 402 at the front end rotates and feeds forward to process the hole to be processed of the bearing shell part. After processing, the motor is controlled to reverse and the reamer 402 is retracted to complete a reaming. Remove the device, change the front and rear end directions of the device, and the remaining reaming work is carried out according to the same steps above.

[0048] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A handheld electric concentric reaming device, characterized in that: include: Outer sleeve body, axial feed mechanism, guide rod mechanism and reamer mechanism; The axial feeding mechanism is connected to the reamer mechanism, the axial feeding mechanism is assembled in the outer sleeve body, and the axial feeding mechanism can move axially along the outer sleeve body, and at the same time drive the reamer mechanism to rotate to realize the reaming operation; The guide rod mechanism is assembled on one end of the outer sleeve body away from the reamer mechanism, and the guide rod mechanism is coaxially arranged with the reamer mechanism; The guide rod mechanism comprises a guide rod and a expansion sleeve, the shaft head of the guide rod cooperates with the expansion sleeve, and the other connecting end of the guide rod is connected to the outer sleeve body.

2. The handheld electric concentric reaming device according to claim 1, characterized in that: The outer sleeve body comprises a sleeve, a lead screw nut is fixedly connected inside the sleeve, and the lead screw nut and the axial feeding mechanism form a transmission pair.

3. The handheld electric concentric reaming device according to claim 2, characterized in that: The axial feeding mechanism comprises a trapezoidal screw, bearings are installed at both ends of the trapezoidal screw, the bearings are installed in a bearing seat, the bearing seat can slide axially along the sleeve, and the shaft head of the trapezoidal screw head is connected to the reamer mechanism.

4. The handheld electric concentric reaming device according to claim 3, characterized in that: The axial feeding mechanism also includes a reducer and a servo motor; the tail shaft head of the trapezoidal screw is connected to the reducer output shaft through a coupling, and the reducer input shaft is connected to the servo motor output shaft.

5. The handheld electric concentric reaming device according to claim 4, characterized in that: The bearing and the bearing seat are connected with two first guide flat keys at the top and bottom, and a slide groove is provided at the top and bottom of the inner cylindrical surface of the sleeve. The first guide flat key is installed in the corresponding slide groove and can move axially.

6. The handheld electric concentric reaming device according to claim 5, characterized in that: The screw nut is connected to two second guide flat keys at the top and bottom, respectively. The second guide flat keys are installed in the corresponding sliding grooves and can move axially.

7. The handheld electric concentric reaming device according to claim 5, characterized in that: The bearing seat away from one end of the reamer mechanism is connected to the reducer through a connecting sleeve, and the connecting sleeve is connected to two third guide keys at the top and bottom, and the third guide keys are installed in the corresponding slide grooves and can move axially.

8. The handheld electric concentric reaming device according to claim 2, characterized in that: The sleeve is provided with a step surface in the radial direction of an inner cross section, dividing the cross-sectional area of ​​the sleeve into two parts, and the end face of the lead screw nut is against the step surface.

9. The handheld electric concentric reaming device according to claim 1, characterized in that: An end of the outer sleeve body away from the reamer mechanism is provided with an inner conical surface, and a connecting end of the guide rod mechanism is provided with an outer conical surface, and the inner conical surface and the outer conical surface are assembled together.

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