Curve plate speed change mechanism

Abstract

The purpose of the present invention is to provide a double-sided curve disk speed change mechanism, including a curve disk, a curve disk fixed shaft, and a speed indicating disk connected to the shaft of the curve disk fixed shaft outside the tool feeding box. The present invention drives a curve disk by a handle. Since curve grooves are arranged on both sides of the curve disk, the curve grooves are arranged in a manner of two curve grooves on one side and one curve groove on the other side. A plurality of lift groove segments are arranged corresponding to a circle of the curve groove adapted by each swing arm. In this way, the basic group of the feed box can easily achieve a speed ratio of 10 speed ratios, maximize the expansion of the metric, imperial, module, diametral pitch thread range and the longitudinal and lateral tool feeding range, and is easy to operate.

Description

Technical Field

[0001] The invention relates to a circulating speed change mechanism with centralized control of a lathe feed box (or tool feeding box), and more specifically to a curve plate multi-stage speed change mechanism for a machine tool gearbox. Background Art

[0002] The speed change mechanism of the lathe feed box needs to meet two requirements, namely, the output speed of the cutting thread, and the output speed of the longitudinal automatic feed and the lateral automatic feed. In ordinary metal cutting machine tools, the multi-stage speed change of the mechanical transmission spindle is mostly achieved in the following ways: one way is to use a single handle to control a single fork to achieve the sliding meshing of a set of sliding gears, and multiple handles are used to achieve the sliding meshing of multiple sets of sliding gears to achieve the purpose of multi-stage speed change of the spindle; another way is to use a handle to drive a single-sided curve disk to control two forks to achieve the sliding displacement of two sets of double gears to obtain four meshing combinations, and then combine with multiple single handles to control a single fork to achieve the purpose of multi-stage speed change of the spindle; another way is to use a handle to drive a single-sided curve disk to control two forks to achieve the sliding displacement of two sets of double gears to obtain four meshing combinations, and then combine with multiple single handles to control a single fork to achieve the purpose of multi-stage speed change of the spindle.

[0003] In view of the defects of ordinary lathes such as few speed change levels, many operating handles and easy operation errors, the applicant's invention patent named "Single-sided curve disk eight-speed change machine" (ZL201310751674.0) provides a single-sided curve disk eight-speed change mechanism that can achieve eight-speed change with only one handle.

[0004] Although the above-mentioned prior patent of the applicant has made significant contributions to the improvement of the prior art, its speed level is still difficult to meet the actual requirements for a wide range of speed levels of machine tools. Summary of the invention

[0005] The object of the present invention is to provide a curve disk speed change mechanism, which can operate a machine tool gearbox with only one handle to realize at least ten levels of speed ratio of a basic group of a feed box.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] One is a curve disk speed change mechanism, including a middle part of a curve disk connected to one end of a curve disk fixed shaft and the disk surface of the curve disk is perpendicular to the axis core of the curve disk fixed shaft, the middle section of the curve disk fixed shaft passes through the wall of the tool box body and the two form a rotational fit, and a speed indicating disk is connected to the axis of the curve disk fixed shaft outside the tool box, characterized in that: two curve grooves are provided on the disk surface of one side of the curve disk, and 1 to 2 curve grooves are provided on the disk surface of the other side, a swing arm and the tool box body are rotationally connected by a pin shaft, a roller on the swing arm cooperates with the curve groove, and a clamping part on the swing arm is clamped with the clamping part on the sliding gear on the rotating shaft to form a fork fit, and the axis cores of the rollers on the curve disk fixed shaft, the pin shaft and the swing arm are arranged in parallel.

[0008] The second is a curve disk speed change mechanism, including a middle part of a curve disk connected to one end of a curve disk fixed shaft and the disk surface of the curve disk is perpendicular to the axis core of the curve disk fixed shaft, the middle section of the curve disk fixed shaft passes through the wall of the tool box body and the two form a rotational fit, and a speed indicating disk is connected to the axis of the curve disk fixed shaft outside the tool box, characterized in that: two curve grooves are provided on the disk surface of one side of the curve disk, the circumferential surface contour of the disk edge of the curve disk is a cam curve, the swing arm and the tool box body are rotationally connected by a pin shaft, the swing arm has a roller that cooperates with the curve groove and the edge of the cam curve, and the swing arm has a clamping part that is clamped with the clamping part on the sliding gear on the rotating shaft to form a fork fit, and the axis cores of the curve disk fixed shaft, the pin shaft and the roller on the swing arm are arranged in parallel.

[0009] The present invention drives a curve disk through a handle. Since the double-sided or single-sided plus disk circumferential surface of the curve disk are utilized to form a cam curve, the curve grooves are arranged in a manner of two curve grooves on one side and one curve groove on the other side, or two disk edge cam curves are arranged on one side. The curve grooves or disk edge cams adapted by each swing arm are arranged with four lift sections in one circle. The basic group of the feed box can thus achieve a speed ratio of 12 speed ratios. Therefore, without adding a pulley, the metric, imperial, module, diametral pitch thread range and the longitudinal and lateral cutting range are expanded to the maximum extent, the operation is convenient, etc., and the gear sets on the input shaft and the output shaft are automatically interlocked without the need for other interlocking mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0011] Figure 2 It is a cross-sectional structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0012] A curve disk speed change mechanism includes a curve disk 10, the middle part of which is connected to one end of a curve disk fixed shaft 20, and the disk surface of the curve disk 10 is perpendicular to the axis core of the curve disk fixed shaft 20. The middle section of the curve disk fixed shaft 20 passes through the wall of a tool feeding box 30 and the two are rotatably matched. A speed indicating disk 21 is connected to the axis of the curve disk fixed shaft 20 outside the tool feeding box 30. Two curve grooves are arranged on the disk surface of one side of the curve disk 10, and 1 to 2 curve grooves are arranged on the disk surface of the other side. A swing arm and the tool feeding box 30 are rotatably connected by a pin shaft 31. A roller on the swing arm cooperates with the curve groove, and a clamping portion on the swing arm is clamped with the end face side clamping portion of the sliding gear on the rotating shaft to form a shift fork match. The axis cores of the curve disk fixed shaft 20, the pin shaft 31 and the roller on the swing arm are arranged in parallel.

[0013] It can be seen from the above scheme that the above scheme is to set curved grooves on both sides of the curve disk 10, so that two inner and outer annular curved grooves are set in the radial direction of one side of the disk surface, and at least one annular curved groove can be set on the other side. Therefore, at least three curved grooves can be set on the curve disk, which easily solves the significant increase in the speed stages of the speed change mechanism. The user only needs to use one handle, and the speed adjustment selection has a convenient and easy practical experience.

[0014] Another independent solution corresponding to the above-mentioned technical aspect is a solution that uses a curved groove on one side of the disk surface and a cam on the circumferential surface of the disk edge. The specific solution is that two curved grooves are provided on one side of the disk surface of the curve disk 10, and the circumferential surface contour of the disk edge of the curve disk 10 is a cam curve. The swing arm and the tool feeding box 30 are rotatably connected by a pin shaft 31. The swing arm has a roller that cooperates with the curved groove and the edge of the cam curve, and the swing arm has a clamping part that is engaged with the clamping part on the sliding gear on the rotating shaft to form a fork. The axis cores of the curve disk fixed shaft 20, the pin shaft 31 and the roller on the swing arm are arranged in parallel.

[0015] The core of the above two basic solutions is to set at least three swing arms, which cooperate with at least two sides of the curve plate to achieve at least 12 speed change functions. In view of the fact that at least 15 speed changes can be provided when curve grooves are set on both sides of the curve plate, the double-sided four-slot solution is emphasized below.

[0016] In view of the complex relationship of spatial positions, in order to facilitate the understanding of the technical solution of the present invention, relevant directions are now defined. The outer side and inner side described below are based on the wall of the tool box 30 as a reference. For example, one side of the curve disk 10 close to the wall of the tool box 30 is the outer side, and the other side is the inner side. Naturally, the curved groove on the inner disk surface of the curve disk 10 is the inner curved groove 11, and vice versa, it is the outer curved groove 12; correspondingly, the inner groove swing arm 40 cooperates with the inner curved groove 11; the outer arm rod 41, the inner arm rod 42 and the inner and outer sides of the inner groove swing arm 40 are also understood according to the above-mentioned directions.

[0017] In order to cooperate with the inner curved groove 11, the present invention provides the following preferred scheme for the structure of the swing arm: the swing arm includes an inner groove swing arm 40, which is a U-shaped rod as a whole, and the inner groove swing arm outer arm rod 41 of the inner groove swing arm 40 is hingedly connected to the box wall of the tool feeding box 30 by a pin shaft 31, and the outer side of the inner groove swing arm inner arm rod 42 of the inner groove swing arm 40 is provided with an inner groove swing arm inner groove swing arm roller 44 to form a rolling cooperation with the inner curved groove 11, and the inner side of the inner groove swing arm inner arm rod 42 of the inner groove swing arm 40 is provided with a fork 45 to be engaged with the clamping part on the gear on the rotating shaft, and the clamping part can be a flange or a groove part arranged on the end face side of the gear, and the inner groove swing arm bottom 43 of the inner groove swing arm 40 is close to the outside of the disk edge across the curve disk 10.

[0018] The inner groove swing arm 40 adopts the above-mentioned U-shaped rod structure, which not only ensures that the inner groove swing arm 40 is still hingedly connected to the box wall of the tool feeding box 30 by the pin shaft 31, but also ensures that the inner groove swing arm inner groove swing arm roller 44 on the inner groove swing arm 40 can easily achieve rolling cooperation with the inner curved groove 11; in this way, the shift fork 45 can also be arranged on the inner groove swing arm inner arm rod 42, as shown in the figure, the above-mentioned scheme can be used to determine that the diameter of the curve disk 10 can be selected to a reasonable size, so as to arrange the curved groove and optimize its various lift sections. A diameter that is too small is not conducive to the design and processing of each lift section of the curved groove; at the same time, the spacing between the rotating shafts can also be arranged appropriately close, reducing the housing space of the chassis, and the radial size of the gear can also be appropriately reduced.

[0019] Similarly, the outer groove swing arm 50 can also refer to the above scheme, that is, the swing arm includes the outer groove swing arm 50, the outer groove swing arm 50 is a U-shaped rod as a whole, the outer groove swing arm outer arm rod 51 of the outer groove swing arm 50 is hingedly connected to the box wall of the tool feeding box 30 by the pin shaft 31, the inner side of the outer groove swing arm outer arm rod 51 of the outer groove swing arm 50 is provided with an outer groove swing arm roller 54 which forms a rolling fit with the outer curved groove 12, the inner side of the outer groove swing arm inner arm rod 52 of the outer groove swing arm 50 is provided with a fork 45 which is engaged with the clamping part on the gear on the rotating shaft, the clamping part can be a flange or a groove part arranged on the end face side of the gear, and the outer groove swing arm bottom 53 of the outer groove swing arm 50 is close to the outside of the disk edge that spans the curved disk 10.

[0020] Combination Figure 1 , 2 As shown, the distance between the rotating shafts is reduced significantly, almost matching the diameter of the curve 10.

[0021] In order to maximize the utilization rate of the surface area of ​​the curve disk 10, a total of four swing arms are provided, including two inner groove swing arms 40 and two outer groove swing arms 50. The two inner groove swing arms 40 are respectively matched with the two curved grooves provided on the inner surface of the curve disk 10, and the two outer groove swing arms 50 are respectively matched with the two curved grooves provided on the outer surface of the curve disk 10. With the above solution, without the need to add other accessories or bump blocks, the double-sided four-slot solution provided by the present invention can provide 16 speed ratios, which is sufficient to meet the conventional speed ratio requirements, and even has surplus, which provides reserved space for function expansion.

[0022] As shown in the figure, the rotating shaft includes the first, second and third transmission shafts 1, 2, 3 arranged in parallel from top to bottom. The first, second and third transmission shafts 1, 2, 3 are arranged on the inner disk surface of the curve disk 10 and are perpendicular to the curve disk fixed axis 20.

[0023] The gear on the rotating shaft that cooperates with the shift fork on the swing arm is a sliding gear, and the sliding gear is arranged on the first and third transmission shafts 1 and 3.

[0024] By adopting the above scheme, the two inner groove swing arms 40 and the two outer groove swing arms 50 can be arranged at the upper and lower parts of the circumferential range of the curve plate 10, and the two located at the upper part have an objective and appropriate spacing, and the lower part is also separated. This is not only conducive to the layout of each lift section of the curve groove, but also ensures the reasonable arrangement of each gear on the first, second and third transmission shafts 1, 2, 3 and the reserved space for axial sliding.

[0025] Combination Figure 2 A process through hole 46 is provided on the swing arm rod on the opposite side of the U-shaped swing arm where the roller is provided. The process through hole 46 is arranged coaxially with the roller on the same swing arm. There is a through hole 13 on the curve disk 10, and the process through hole 46 can be moved to a position coaxial with the through hole 13.

[0026] When the process through hole 46 and the through hole 13 cooperate, the roller or the roller shaft can be squeezed or punched out from the connecting hole on the swing arm by a tool, so as to achieve the purpose of removing the roller, so as to replace the roller in time or separate the curve plate 10 from the swing arm to replace other parts. It should be noted that when the outer groove swing arm 50 can use the aforementioned U-shaped rod solution, the operation of removing the roller can be implemented by using the solution of the process through hole 46 and the through hole 13.

[0027] The above describes the scheme of the swing arm being a U-shaped rod and the corresponding shift fork setting scheme. The swing arm of the present invention can also be set according to the following scheme, that is, the inner groove swing arm 40 is in an H shape as a whole, and the inner arm rod 42 of the inner groove swing arm is a long rod. The adoption of the H-shaped swing arm scheme provides at least two arrangements for arranging the shift fork 45, one of which is to arrange it on the outer section of the inner arm rod 42 of the inner groove swing arm, and the other is to arrange one on each of the inner and outer sections of the inner arm rod 42 of the inner groove swing arm. If the former is selected, the shift fork is arranged farther from the fixed axis 20 of the curve plate, that is, arranged outside the edge of the curve plate 10, so as to adapt to the gear shifting on the transmission shaft with a larger spacing; if the latter is selected, two shift forks are set, and of course, the sliding gears on the transmission shafts of both can be driven.

[0028] In the above scheme, the inner groove swing arm roller 44 can also adopt a sliding sleeve structure. When the inner groove swing arm roller 44 uses a rolling bearing, noise and friction can be reduced. In addition, the cooperation between the curved groove 11 on the curve disk 10 and the swing arm is actually the specific implementation of the cam mechanism, wherein the inner curved groove 11 is the active part, and the inner groove swing arm roller 44 and the inner curved groove 11 can be rolling or sliding. The former is the preferred scheme. When the curve disk 10 rotates, the shift fork 45 moves forward-stop-forward-stop. The shift fork assembly is not limited to directly driving the gear, but can also drive the shaft or motion mechanism of the next level gear installation. This patent realizes clockwise and counterclockwise cyclic motion. The operation is further simplified. The four swing arm groups move according to the design requirements; each time the handle plate rotates an angle, a set of data is output.

[0029] During specific assembly, a support seat 32 is installed in a mounting hole on the front cover of the tool feeding box 30. The support seat 32 is a tubular body with an external flange at the outer end. The curve disk fixed shaft 20 and the support seat 32 form an axially limited rotation fit; the speed indicating disk 21, the curve disk fixed shaft 20 and the curve disk 10 are coaxially connected in a circumferentially synchronous manner. The working process of the present invention is briefly described below:

[0030] In the embodiment of the present invention, four swing arms are provided. Figure 1 Take the inner groove swing arm 40 in the upper right part of the figure as an example: turn the handle plate 9, the curve plate 7 rotates an angle accordingly, the inner groove swing arm roller 44 rolls on the groove wall of the inner curve groove 11, and generates a driving force to drive the inner groove swing arm 40 to rotate around the pin 31; the shift fork 45 on the inner groove swing arm 40 is horizontally axially displaced or stopped, and the shift fork 45 cooperates with the corresponding gear and drives it to synchronously displace or stop. There is a handle 22 on the speed indicating plate 21 connected to the fixed shaft (20) of the curve plate. Turning the handle 22 and rotating it an angle will cause the corresponding shift fork to drive the corresponding mechanism or gear to achieve a propulsion and stop, and the cycle is repeated.

[0031] In view of the particularity or personalized requirements of the arrangement of each rotating shaft in the tool feeding box, the present invention can also adopt the following technical solution, that is, two curved grooves are arranged on one side of the disk surface of the curve disk 10, and one curved groove is arranged on the other side of the disk surface, the peripheral surface contour of the disk edge of the curve disk 10 is a cam curve, and the rollers correspondingly arranged on the four swing arms are respectively matched with the curved grooves and the edges of the cam curves. The above solution is suitable for the occasion where the spacing between the rotating shafts is large. The length of the swing arm that matches the peripheral surface contour of the disk edge of the curve disk 10 is a cam curve does not need to be too long to reach the sliding gear to be pushed. The above solution also provides a new selection path for the specific arrangement of the double-sided curved grooves, that is, it can reduce the difficulty of designing the double-sided curved grooves and optimize the coordinated arrangement of each other.

Claims

1. A curve plate speed change mechanism, comprising a curve plate (10) whose middle part is connected to one end of a curve plate fixed shaft (20), and the plate surface of the curve plate (10) is perpendicular to the axis of the curve plate fixed shaft (20), the middle section of the curve plate fixed shaft (20) passes through the wall of a tool feeding box (30) and the two are rotatably matched, and a speed indicating plate (21) is connected to the axis of the curve plate fixed shaft (20) outside the tool feeding box (30), characterized in that: The curve disk (10) has two curve grooves on one side of the disk, and one to two curve grooves on the other side of the disk. The swing arm and the tool feeding box (30) are connected in rotation by a pin shaft (31). The swing arm has a roller that cooperates with the curve groove, and the swing arm has a clamping part that is engaged with the clamping part of the sliding gear on the rotating shaft to form a shift fork. The axis cores of the curve disk fixed shaft (20), the pin shaft (31) and the roller on the swing arm are arranged in parallel. The swing arm comprises an inner groove swing arm (40), the inner groove swing arm (40) is in a U-shaped rod shape as a whole, the inner groove swing arm outer arm rod (41) of the inner groove swing arm (40) is hingedly connected to the box wall of the tool feeding box (30) by a pin shaft (31), the outer side of the inner groove swing arm inner arm rod (42) of the inner groove swing arm (40) is provided with an inner groove swing arm roller (44) which forms a rolling fit with the inner curved groove (11), the inner side of the inner groove swing arm inner arm rod (42) of the inner groove swing arm (40) is provided with a shift fork (45) which is engaged with a clamping part on the gear on the rotating shaft, and the inner groove swing arm bottom (43) of the inner groove swing arm (40) is adjacent to and spans the outer side of the plate edge of the curved plate (10); The swing arm comprises an outer groove swing arm (50), the outer groove swing arm (50) is in a U-shaped rod shape as a whole, the outer groove swing arm outer arm rod (51) of the outer groove swing arm (50) is hingedly connected to the box wall of the tool feeding box (30) by a pin shaft (31), the inner side of the outer groove swing arm outer arm rod (51) of the outer groove swing arm (50) is provided with an outer groove swing arm roller (54) which forms a rolling fit with the outer curved groove (12), the inner side of the outer groove swing arm inner arm rod (52) of the outer groove swing arm (50) is provided with a shift fork (45) which is engaged with the clamping part on the gear end face side of the rotating shaft, and the outer groove swing arm bottom (53) of the outer groove swing arm (50) is adjacent to and spans the outer edge of the curved plate (10); A total of four swing arms are provided, including two inner groove swing arms (40) and two outer groove swing arms (50). The two inner groove swing arms (40) respectively cooperate with two curved grooves provided on the inner disk surface of the curved disk (10), and the two outer groove swing arms (50) respectively cooperate with two curved grooves provided on the outer disk surface of the curved disk (10).

2. The curve plate speed change mechanism according to claim 1, characterized in that: The rotating shaft comprises a first, a second and a third transmission shaft (1, 2, 3) arranged in parallel from top to bottom. The first, the second and the third transmission shaft (1, 2, 3) are arranged on the inner disk surface of the curve disk (10) and are perpendicular to the curve disk fixed shaft (20).

3. The curve plate speed change mechanism according to claim 2, characterized in that: The gear on the rotating shaft matched with the shift fork on the swing arm is a sliding gear, and the sliding gear is arranged on the first and third transmission shafts (1, 3).

4. The curve plate speed change mechanism according to claim 1, characterized in that: A process through hole (46) is arranged on the swing arm rod on the opposite side of the U-shaped swing arm to which the roller is arranged, and the process through hole (46) is arranged coaxially with the roller on the same swing arm. A through hole (13) is arranged on the curve disk (10), and the process through hole (46) can be moved to a position coaxial with the through hole (13).

5. The curve plate speed change mechanism according to claim 1, characterized in that: The inner groove swing arm (40) is in an H-shape as a whole, and the inner arm rod (42) of the inner groove swing arm is a long rod.

6. The curve plate speed change mechanism according to claim 1, characterized in that: A support seat (32) is installed in a mounting hole on the front cover plate of the tool feeding box (30). The support seat (32) is a tubular body with an external flange at the outer end. The curve disk fixed shaft (20) and the support seat (32) form an axially limited rotational fit; the speed indicating disk (21), the curve disk fixed shaft (20) and the curve disk (10) are coaxially connected in a circumferentially synchronous manner.

7. The curve plate speed change mechanism according to claim 1, characterized in that: The curved disk (10) has two curved grooves on one side of the disk surface and one curved groove on the other side of the disk surface. The peripheral surface profile of the disk edge of the curved disk (10) is a cam curve. The rollers correspondingly arranged on the four swing arms cooperate with the curved grooves and the edges of the cam curve respectively.

8. A curve plate speed change mechanism, comprising a circular curve plate (10) whose middle part is connected to one end of a curve plate fixed shaft (20), and the plate surface of the curve plate (10) is perpendicular to the axis of the curve plate fixed shaft (20), the middle section of the curve plate fixed shaft (20) passes through the wall of a tool box (30) and the two are rotatably matched, and a speed indicating plate (21) is connected to the axis of the curve plate fixed shaft (20) outside the tool box (30), characterized in that: Two curved grooves are arranged on one side of the curved disk (10); the peripheral surface of the curved disk (10) is a cam curve; the swing arm and the body of the tool feeding box (30) are connected in rotation by a pin shaft (31); a roller on the swing arm cooperates with the curved groove and the edge of the cam curve; and a clamping part on the swing arm is clamped with a clamping part on the sliding gear on the rotating shaft to form a shift fork cooperation; the axis cores of the curved disk fixed shaft (20), the pin shaft (31) and the roller on the swing arm are arranged in parallel; The swing arm comprises an inner groove swing arm (40), the inner groove swing arm (40) is in a U-shaped rod shape as a whole, the inner groove swing arm outer arm rod (41) of the inner groove swing arm (40) is hingedly connected to the box wall of the tool feeding box (30) by a pin shaft (31), the outer side of the inner groove swing arm inner arm rod (42) of the inner groove swing arm (40) is provided with an inner groove swing arm roller (44) which forms a rolling fit with the inner curved groove (11), the inner side of the inner groove swing arm inner arm rod (42) of the inner groove swing arm (40) is provided with a shift fork (45) which is engaged with a clamping part on the gear on the rotating shaft, and the inner groove swing arm bottom (43) of the inner groove swing arm (40) is adjacent to and spans the outer side of the plate edge of the curved plate (10); The swing arm comprises an outer groove swing arm (50), the outer groove swing arm (50) is in a U-shaped rod shape as a whole, the outer groove swing arm outer arm rod (51) of the outer groove swing arm (50) is hingedly connected to the box wall of the tool feeding box (30) by a pin shaft (31), the inner side of the outer groove swing arm outer arm rod (51) of the outer groove swing arm (50) is provided with an outer groove swing arm roller (54) which forms a rolling fit with the outer curved groove (12), the inner side of the outer groove swing arm inner arm rod (52) of the outer groove swing arm (50) is provided with a shift fork (45) which is engaged with the clamping part on the gear end face side of the rotating shaft, and the outer groove swing arm bottom (53) of the outer groove swing arm (50) is adjacent to and spans the outer edge of the curved plate (10); A total of four swing arms are provided, including two inner groove swing arms (40) and two outer groove swing arms (50). The two inner groove swing arms (40) respectively cooperate with two curved grooves provided on the inner disk surface of the curved disk (10), and the two outer groove swing arms (50) respectively cooperate with two curved grooves provided on the outer disk surface of the curved disk (10).

Images