Inner wall blind hole machining device for small workpiece

Abstract

The utility model discloses an inner wall blind hole processing device for small workpieces, which comprises a driving component, the driving component is mounted on a fixing plate, a limiting block is arranged on the fixing plate, and an output shaft of the driving component penetrates through the fixing plate; the gear transmission mechanism comprises two gears which are installed on the main transmission shaft and the drill bit respectively and meshed with each other, the main transmission shaft and the drill bit are both installed on two oppositely-arranged supporting plates, the main transmission shaft is connected with an output shaft, and the end of the drill bit penetrates through one supporting plate to be arranged outwards. The top faces of the two supporting plates are arranged at the same height, and the side faces of the two supporting plates are flush to support a cavity of a workpiece to be machined. A to-be-machined workpiece of the device is placed on the supporting plate to be positioned close to the edge and pushed by hands to move to machine a blind hole, the drilling depth of the blind hole is determined by the distance between the limiting block and the supporting plate, operation is easy and rapid, and the device is suitable for small-batch production of small workpieces.

Description

TECHNICAL FIELD

[0001] The utility model relates to the partial improvement design technical field of drilling device, especially a kind of inner wall blind hole processing device for small workpiece. BACKGROUND

[0002] Traditional three-axis numerical control processing equipment (CNC) main shaft is vertically arranged above workbench, drill is vertically installed in the lower part of main shaft Drill Chuck, only horizontal movement and vertical drilling can be carried out, for the operation of needing to process blind hole in the inner cavity of workpiece, main shaft is blocked by the wall of workpiece, main shaft and drill cannot enter the inner cavity of workpiece, blind hole cannot be directly processed in the inner cavity of workpiece, must use four-axis, five-axis or higher axis number numerical control processing equipment to directly process blind hole in the inner cavity of workpiece, but, this kind of numerical control processing equipment has the problems of complex linkage structure, high requirement of control system, large programming difficulty and high equipment cost, not suitable for inner wall blind hole processing of small workpiece.

[0003] Existing inner cavity punching device generally relies on milling machine or machining center, when processing blind hole, the blind hole needs to be located on the outer surface of part, and a certain space is needed above the part to prevent main shaft interference, to ensure normal rotation of machine tool main shaft, to realize blind hole processing of part inner wall, it is necessary to drill through hole on the outer surface of part first, then carry out welding plugging through hole and subsequent plugging surface processing process, the overall processing steps are numerous, and the manufacturing cost is high.

[0004] In the prior art, the patent with publication number CN212857856U discloses a structure for processing inner cavity blind hole, which comprises a main shaft seat, the main shaft seat is provided with a main rotating shaft, the lower part of the main shaft seat is fixedly connected with an extension bracket, the outer end of the extension bracket extends transversely to one side of the main rotating shaft, the extension bracket is provided with a transmission mechanism and a drill chucking mechanism for mounting a drill, the drill chucking mechanism is arranged on the outer side of the extension bracket, and the transmission mechanism is respectively connected with the main rotating shaft and the drill chucking mechanism. Compared with the prior art, the structure for processing inner cavity blind hole can realize that the drill tool extends into the to-be-processed position from the opening of the shell workpiece, directly processes the blind hole in the shell inner cavity, has high blind hole processing precision, is simple to operate, and improves production efficiency.

[0005] The patent with the publication number CN115338450A discloses an inner cavity punching device based on a gear set transmission structure and a mounting method thereof. The inner cavity punching device comprises a driving shaft, a transmission shaft, a driven gear shaft, a base, a pressing plate, a support column, a locking device, a tool clamping mechanism, etc. The transmission shaft, a transmission shaft left bearing and a transmission shaft right bearing form a transmission shaft system. The driven gear shaft, a driven gear shaft upper bearing and a driven gear shaft lower bearing form a driven gear shaft system, which ensures the rotation accuracy of the shaft system and adopts high-precision gears to ensure the stability of rotation. The gear set transmission technology is adopted to convert the driving force of the machine tool spindle into the driving force of the driven gear shaft through twice reversing. The inner cavity punching device has the following advantages: 1. stable transmission and high machining precision; 2. the driven gear shaft can be inserted into the workpiece to be machined for machining due to its small size, which solves the difficulty of machining the blind hole in the inner cavity of the workpiece to be machined; and 3. different tools can be replaced according to different machining sizes, and the operation is flexible.

[0006] The present application provides an inner wall blind hole machining device for small workpieces to solve one of the above problems. Utility model content

[0007] The utility model discloses a kind of inner wall blind hole machining devices for small workpieces to solve the problems existing in prior art, and the workpiece to be processed is positioned on support plate and is processed blind hole by hand pushing movement, the spacing between limiting block and support plate determines blind hole drilling depth, it is simple and quick to operate, and it is applicable to small workpiece small batch production.

[0008] To achieve the above object, the utility model adopts the following technical scheme: an inner wall blind hole machining device for small workpieces, comprising a driving assembly, the driving assembly is installed on a fixed plate, a limiting block is provided on the fixed plate, and the output shaft of the driving assembly penetrates the fixed plate.

[0009] A gear transmission mechanism, the gear transmission mechanism includes two gears installed on the main transmission shaft and the drill bit respectively and meshed with each other, the main transmission shaft and the drill bit are both installed on two oppositely arranged support plates, the main transmission shaft is connected to the output shaft, the end of the drill bit penetrates one of the support plates and is arranged outward, the other support plate is arranged opposite to the limiting block, and the top surfaces of the two support plates are arranged at the same height respectively and the side surfaces are arranged flush respectively to support the cavity of the workpiece to be processed.

[0010] Further, the driving assembly includes a motor and a speed reducer, and the motor drives the gear transmission mechanism to work after speed reduction by the speed reducer.

[0011] Further, the motor and the speed reducer are assembled together and installed on the fixed plate, and the output shaft of the speed reducer is connected to the main transmission shaft through a shaft coupling.

[0012] Further, the driving assembly as described above further comprises a control box, and the control box is electrically connected with the motor.

[0013] Further, the main transmission shaft and the drill bit as described above are rotatably installed on the first support plate and the second support plate, the first support plate and the limiting block are oppositely arranged, and the end of the drill bit is arranged outside the second support plate.

[0014] Further, the first gear is installed on the main transmission shaft, and the gear chuck is installed on the drill bit, and the first gear engages with the gear chuck.

[0015] Further, the first support plate and the second support plate as described above are further rotatably installed with the driven transmission shaft, the second gear is installed on the driven transmission shaft, and the second gear simultaneously engages with the first gear and the gear chuck.

[0016] Further, the first support plate and the second support plate as described above are connected with the fixed seat, and the second gear, the first gear and the gear chuck are located between the first support plate and the second support plate.

[0017] Further, the first support plate and the second support plate as described above are processed with the step positions with the same position and size, and the top surface and the side surface of the fixed seat have a size not more than the top surface and the step position of the support plate.

[0018] Further, the fixed plate and the support plate as described above are installed on the bottom plate.

[0019] Compared with the prior art, the beneficial effects of the utility model are that: the blind hole is processed by positioning the workpiece to be processed on the two support plates and moving by hand, the cavity inner wall of the workpiece to be processed is attached to the top surface and the side surface of the support plate, the processing position is determined by the edge positioning, the operation is simple and fast, the spacing between the limiting block and the support plate determines the blind hole drilling depth, and the utility model is suitable for small batch production of small workpieces. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of the utility model;

[0021] Figure 2 It is a top view of the utility model;

[0022] Figure 3 It is Figure 2 It is a schematic view of the workpiece to be processed after being placed in the utility model;

[0023] Figure 4 It is Figure 3 It is an exploded schematic view of the utility model;

[0024] Figure 5 It is a schematic view of the workpiece to be processed after the blind hole is processed in the utility model.

[0025] In the figure: 1, motor; 2, fixed plate; 3, limit block; 4, first support plate; 5, fixed seat; 6, second support plate; 7, bottom plate; 8, drill bit; 9, gear transmission mechanism; 90, gear chuck; 91, second gear; 92, first gear; 10, control box; 11, workpiece to be processed; 111, blind hole. DETAILED DESCRIPTION

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "fixed", "mounted", "connected", "provided" and the like should be understood broadly, for example, when an element is referred to as "fixed to" another element, it can be directly on another element or there can be a middle element. When an element is considered "mounted on" another element, it can be directly mounted on another element or there can be a middle element. When an element is considered "connected" to another element, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two elements.

[0028] For those skilled in the art, the specific meanings of the above terms in the present application can be understood in specific circumstances.

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] Embodiment one

[0031] Reference Figures 1-4As shown, the utility model discloses a kind of inner wall blind hole processing device for small workpiece, including drive assembly, provide the power of drilling processing, the drive assembly is installed on fixed plate 2, fixed plate 2 is installed on bottom plate 7, limiting block 3 is provided on fixed plate 2, the output shaft of drive assembly penetrates fixed plate 2, to provide power to gear transmission mechanism 9;

[0032] Gear transmission mechanism 9, the gear transmission mechanism 9 including two respectively installed on main drive shaft and drill bit 8 and mutually meshing gears, utilize gear engagement to drive drill bit 8 rotation work and reduce the rotating speed when working, main drive shaft and drill bit 8 are rotatably installed on two oppositely arranged support plates, ensure installation position and rotation work stability, main drive shaft is connected output shaft, the end of drill bit 8 penetrates one support plate and is outwardly arranged, to process blind hole 111 at the cavity inner wall of the workpiece 11 to be processed, another support plate and limiting block 3 are oppositely arranged, and the spacing of two is determined the depth of blind hole 111 drilling, the top surface of two support plates is respectively set to be equal height and side is respectively set to be flush to support the cavity of workpiece 11 to be processed, i.e. the cavity bottom of workpiece 11 to be processed and the top surface of two support plates are contacted, the cavity sidewall of workpiece 11 to be processed and the side of two support plates are contacted, so that workpiece 11 to be processed can be positioned on the support plate by edge, drilling feed is realized by hand pushing, limiting block 3 blocks workpiece 11 to be processed, and the function of limiting and determining drilling depth is played.

[0033] Embodiment two

[0034] Refer to Figures 1-4 As shown, on the basis of the technical scheme of embodiment one, a kind of inner wall blind hole processing device for small workpiece, for the specific structural design of drive assembly, as Figure 1 And Figure 2 It is known that the drive assembly includes motor 1 and speed reducer, motor 1 drives gear transmission mechanism 9 to work after speed reduction by speed reducer, usually, motor 1 and speed reducer are assembled together and installed on fixed plate 2, the output shaft of speed reducer is connected main drive shaft by coupling.In addition, the drive assembly also includes control box 10, control box 10 is electrically connected motor 1, control box 10 is installed on bottom plate 7, to start and stop motor 1.

[0035] For the specific structural design of gear transmission mechanism 9, as Figure 1 And Figure 2It can be seen that the main transmission shaft and the drill bit 8 are rotatably mounted on the first support plate 4 and the second support plate 6, that is, the main transmission shaft and the drill bit 8 are connected with the two support plates through bearing assembly respectively, the selection and installation of the bearing are existing mature technology, which will not be repeated here. The first support plate 4 and the limiting block 3 are oppositely arranged, the limiting block 3 plays a limiting blocking role, the end of the drill bit 8 is arranged outside the second support plate 6, and the installation position and direction of the drill bit 8 are determined. In addition, the first gear 92 is mounted on the main transmission shaft, and the gear chuck 90 is mounted on the drill bit 8, the first gear 92 engages with the gear chuck 90, and the main transmission shaft can directly transmit power to the drill bit 8, so that the drill bit 8 rotates to work and drill.

[0036] Embodiment three

[0037] Referring to Figures 1-4 On the basis of the technical scheme of the above-mentioned embodiment two, a gear transmission mechanism 9 for the inner wall blind hole machining device of a small workpiece can further increase a driven transmission shaft, that is, the first support plate 4 and the second support plate 6 can further rotatably mount the driven transmission shaft, the second gear 91 is mounted on the driven transmission shaft, and the second gear 91 simultaneously engages with the first gear 92 and the gear chuck 90. In this way, the main transmission shaft can indirectly transmit power to the drill bit 8 through the driven transmission shaft, so that the drill bit 8 meets the requirements of drilling machining. The gear transmission mechanism 9 has two functions, one is to partially replace the speed reducer to provide the function of reducing speed, and the other is that the installation position of the drill bit 8 is flexible and the length of the drill bit 8 will not hinder the placement and movement operation of the workpiece 11 on the support plate, which can meet the requirements of the position and size of the blind hole 111.

[0038] Further, the first support plate 4 and the second support plate 6 are connected with the fixed seat 5, the fixed seat 5 is mounted on the bottom plate 7, the side parts of the two support plates are connected with the fixed seat 5, which is equivalent to that the first support plate 4 and the second support plate 6 are indirectly mounted on the bottom plate 7. Generally, the second gear 91, the first gear 92 and the gear chuck 90 are located between the first support plate 4 and the second support plate 6, and the spacing between the two support plates can meet the size requirements of the cavity of the workpiece 11. In actual production process, if the size of the cavity of the workpiece 11 and the spacing between the two support plates cannot be matched, the second gear 91, the first gear 92 and the gear chuck 90 can also be arranged outside the two support plates. In addition, the first support plate 4 and the second support plate 6 are machined with steps of the same position and size, the design of the step is to determine the coplanar side size of the two support plates, and the spacing parameters of the two support plates are combined to match the size of the cavity of the workpiece 11. The top surface and the side surface size of the fixed seat 5 do not exceed the top surface and the step size of the support plate, so as to avoid the interference and obstruction of the fixed seat 5.

[0039] AsFigure 5 As shown, the cavity of the workpiece 11 to be processed is in the shape of an open slot, and the processing position of the blind hole 111 is on the long side of the inner wall of the cavity. The conventional processing method is generally to clamp and fix the workpiece 11 to be processed, and then to insert the drill bit 8 into the cavity to process the blind hole 111. However, due to size limitations, conventional drilling devices cannot be placed in the cavity for work, and purchasing special micro drilling equipment is relatively expensive, which is not cost-effective for small batch production and processing.

[0040] For the small batch production of the above-mentioned small workpiece 11 to be processed, the improvement idea of the processing device is that the position of the drill bit 8 is fixed, the workpiece 11 to be processed is placed on the support plate on which the drill bit 8 is installed, and is moved in the axial direction of the drill bit 8, which is equivalent to the feed processing of the drill bit 8. Specifically, the transmission mode of the drill bit 8 is changed, the top and side of the support plate are processed into positioning reference surfaces, the cavity of the workpiece 11 to be processed is on the top and side of the support plate, the top of the support plate is used as a horizontal positioning reference surface, and one of the sides is used as a side positioning reference surface. The workpiece 11 to be processed is placed on the support plate and positioned horizontally and on the side. After the workpiece 11 to be processed is placed in position (the inner wall of the cavity does not touch the drill bit), the motor 1 is started, the workpiece 11 to be processed is moved along the side of the support plate by hand to realize the drilling operation of the drill bit, until the limit block 3 stops moving, and then the drill bit 8 stops working. The workpiece 11 to be processed is reset and taken to complete the processing of the blind hole 111.

[0041] In the device of the utility model, the assembly and cooperation relationship of each component are involved, each gear, bearing, motor 1, speed reducer and control box 10 and its control software are prior art or materials, and the skilled in the art can directly purchase or customize them according to the required product model and specification.

[0042] The electrical elements appearing in the text are all connected with the main controller and 220V mains or industrial power supply, and the main controller can be a conventional known device such as a computer that can control.

[0043] The above is only a preferred specific embodiment of the utility model, and the specific structure and characteristics known in the scheme are not described in detail. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered within the protection range of the utility model.

Claims

1. An apparatus for processing a blind hole in an inner wall of a small workpiece, characterized by, The driving assembly is installed on the fixed plate (2), and the fixed plate (2) is provided with a limiting block (3); the output shaft of the driving assembly penetrates the fixed plate (2); The gear transmission mechanism (9) comprises two gears which are installed on the main transmission shaft and the drill bit (8) respectively and are engaged with each other, the main transmission shaft and the drill bit (8) are both installed on two oppositely arranged supporting plates, the main transmission shaft is connected with the output shaft, the end of the drill bit (8) penetrates a supporting plate and is arranged outward, the other supporting plate is arranged opposite to the limiting block (3), the top surfaces of the two supporting plates are arranged at the same height respectively and the side surfaces are arranged flush respectively to support the cavity of the workpiece (11) to be machined.

2. The apparatus for processing a blind hole of an inner wall of a small workpiece according to claim 1, wherein The driving assembly comprises a motor (1) and a speed reducer, the motor (1) drives the gear transmission mechanism (9) to work after speed reduction through the speed reducer.

3. A device for processing blind holes in the inner wall of small workpieces according to claim 2, characterized in that, The motor (1) and the speed reducer are assembled together and installed on the fixed plate (2), and the output shaft of the speed reducer is connected with the main transmission shaft through a shaft coupling.

4. The apparatus for processing a blind hole of an inner wall of a small workpiece according to claim 3, wherein The driving assembly further comprises a control box (10), and the control box (10) is electrically connected with the motor (1).

5. The apparatus for processing internal wall blind holes of small workpieces according to claim 1, characterized in that, The main transmission shaft and the drill bit (8) are both rotatably installed on the first supporting plate (4) and the second supporting plate (6), the first supporting plate (4) is arranged opposite to the limiting block (3), and the end of the drill bit (8) penetrates the second supporting plate (6) and is arranged outside.

6. A device for processing blind holes in the inner wall of small workpieces according to claim 5, characterized in that, The first gear (92) is installed on the main transmission shaft, and the gear chuck (90) is installed on the drill bit (8), and the first gear (92) is engaged with the gear chuck (90).

7. A device for processing blind holes in the inner wall of small workpieces according to claim 6, characterized in that, The first supporting plate (4) and the second supporting plate (6) are further rotatably installed with a driven transmission shaft, the second gear (91) is installed on the driven transmission shaft, and the second gear (91) is engaged with the first gear (92) and the gear chuck (90) at the same time.

8. The apparatus for processing a blind hole of an inner wall of a small workpiece according to claim 7, wherein The first supporting plate (4) and the second supporting plate (6) are both connected with the fixed seat (5), and the second gear (91), the first gear (92) and the gear chuck (90) are all located between the first supporting plate (4) and the second supporting plate (6).

9. A device for processing blind holes in the inner wall of small workpieces according to claim 8, characterized in that, The first supporting plate (4) and the second supporting plate (6) are both machined with step positions which are the same in position and size, and the top surface and the side surface of the fixed seat (5) have sizes which do not exceed the top surface and the step position of the supporting plate.

10. A device for processing blind holes in the inner wall of small workpieces according to any one of claims 1 to 9, characterized in that, The fixed plate (2) and the supporting plate are both installed on the bottom plate (7).

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