A translation mechanism for driving a workholding fixture to perform a translation motion

Abstract

The present invention discloses a translation mechanism for driving a tool fixture to perform translational motion, comprising a cylinder body and a translation plate, the translation plate being arranged on the cylinder body so as to be movably disposed left and right. The invention is characterized in that a driving structure comprises a piston, the piston being arranged in the cylinder body so as to be movably disposed left and right, the piston and the translation block being connected by a toggle block, the toggle block having opposite ends comprising a first toggle portion and a second toggle portion, a rotating mounting portion being rotatably disposed in the cylinder body, a first rotating shaft being rotatably disposed at the bottom of the translation plate, a first clamping groove being recessed at the end of the first toggle portion, the first rotating shaft being disposed in the first clamping groove, a second rotating shaft being rotatably disposed on the piston, a second clamping groove being recessed at the end of the second toggle portion, the second rotating shaft being disposed in the second clamping groove. The invention has the advantages of a simple structure, and achieving a large stroke and smooth translation of the translation plate while maintaining a controllable volume.

Description

Technical Field

[0001] The present invention relates to the field of workpiece processing, and in particular to a translation mechanism for driving a tool fixture to perform translational motion. Background Art

[0002] In the field of workpiece machining, in order to improve workpiece machining efficiency, for example, to achieve machining of two different center positions while simultaneously clamping the workpiece, a translation mechanism is required to drive the workpiece fixture (such as a chuck) to perform translational motion, thereby driving the workpiece to translate. Currently, the most common translation mechanisms for driving the workpiece to translate are structures that use a combination of gears and racks. This type of translation mechanism has multiple structures, low transmission efficiency, and a small translation distance. It cannot meet the requirements of long translation strokes. If a long translation stroke is to be achieved, the rack must be very long, resulting in a large space occupied by the entire mechanism. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a translation mechanism for driving a tool fixture to perform translational motion, which has a simple structure, can realize large-stroke translation, and occupies a small space.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] The cam is connected to the drive means for rotating the said sliding plate so as to move the said sliding plate downwards so as to move the said sliding plate downwards, so that the said sliding plate can move relative to the said cylinder body.

[0006] The two inner end surfaces opposite to each other in the first clamping groove are first clamping end surfaces, and the two first clamping end surfaces are parallel flat end surfaces to each other. The first rotating shaft has a first clamping portion that matches the first clamping groove, and the first clamping portion is arranged in the first clamping groove. The two opposite end surfaces of the first clamping portion are respectively recessed with first recessed portions, and the bottom end surfaces of the first recessed portions are flat end surfaces that match the first clamping end surfaces, and one first clamping end surface is in contact with the bottom end surface of one first recessed portion.

[0007] The two opposing inner end faces of the second clamping groove are second clamping end faces, and the two second clamping end faces are parallel flat end faces. The second rotating shaft has a second clamping portion that matches the second clamping groove, and the second clamping portion is disposed in the second clamping groove. The two opposing end faces of the second clamping portion are respectively recessed with second recessed portions, and the bottom end faces of the second recessed portions are flat end faces that match the second clamping end faces. One second clamping end face fits the bottom end face of one second recessed portion. Surface contact is formed by the flat end face in the clamping groove matching the flat end face of the recessed portion on the rotating shaft, making the contact more stable. Furthermore, due to the large contact area of the surface contact during the entire movement process, the wear between the toggle block and the rotating shaft is greatly reduced, thereby effectively extending the service life of each component.

[0008] A mounting shaft is arranged in the cylinder body from front to back, and the rotating mounting portion is rotatably arranged on the mounting shaft, thereby realizing a stable rotatable mounting of the toggle block in the cylinder body.

[0009] There are two pistons, spaced apart and arranged in parallel front and back. The two pistons are connected by the second rotating shaft, with both ends of the second rotating shaft rotatably mounted on the two pistons. The second toggle portion extends between the two pistons. The two pistons jointly drive the toggle block, ensuring sufficient force to drive the translation plate to translate within the cylinder. This also provides a balancing effect, ensuring stable rotation of the toggle block and thus stable translation of the translation plate, effectively preventing blade vibration.

[0010] The cylinder body is provided with a guide cavity for guiding the left and right movement of the piston. The piston divides the guide cavity into two independent chambers, each of which has an oil port connected thereto. An oil circuit converter is provided at the bottom of the cylinder body. The oil circuit converter has oil supply channels connected to the oil ports for supplying oil to the corresponding chambers. Oil is supplied to the corresponding chambers through the corresponding oil supply channels within the oil circuit converter, providing power for the left and right movement of the piston. The guide cavity provides stable mounting and positioning for the piston and also guides its left and right movement.

[0011] The linear distance between the end of the first toggle member and the central axis of the second rotating shaft is smaller than the linear distance between the end of the second toggle member and the central axis of the second rotating shaft. This design is based on the principle of leverage, ensuring that the toggle block has sufficient force to drive the translation plate to perform translational motion.

[0012] Two connecting seats are provided at intervals on the bottom of the translation plate. The connecting seats extend into the cylinder body, and the first rotating shaft is rotatably mounted between the two connecting seats. The two connecting seats provide stable mounting and positioning for the rotatable mounting of the first rotating shaft.

[0013] The cylinder body is provided with an adjustment mechanism for adjusting the translation distance of the translation plate;

[0014] The adjustment mechanism includes two positioning blocks fixedly mounted on the cylinder body, the two positioning blocks are arranged in parallel and spaced apart on the left and right sides of the translation plate, the translation plate can be arranged between the two positioning blocks so as to be translated left and right, and an adjustment block is detachably mounted on each positioning block, the adjustment block includes a horizontally mounted mounting portion and a vertically mounted adjustment portion, the upper end of the adjustment portion is connected to the inner end of the mounting portion so that the adjustment block has an inverted L-shaped structure, the mounting portion is detachably connected to the positioning block, and the adjustment portion is fitted on the inner end face of the positioning block. The precise adjustment of the translation distance of the translation plate is achieved through the cooperation of the positioning block and the adjustment block, so that the position accuracy of the translation of the translation plate is high, thereby effectively ensuring the processing accuracy of the workpiece. During specific adjustments, it is only necessary to select an adjustment block with an adjustment portion having a corresponding adjustment thickness, which is simple to operate.

[0015] The mounting portion is provided with a mounting hole extending vertically therethrough, and the positioning block is provided with a mounting screw hole coaxial with the mounting hole. Screws or bolts that match the mounting screw holes are threaded through the mounting holes and screwed into the mounting screw holes to achieve detachable mounting of the adjusting block on the positioning block. The above-described structure for detachably mounting the adjusting block and the positioning block is simple, low-cost, and easy to assemble and disassemble.

[0016] The fixture and the translation plate are detachably connected, which makes the entire translation mechanism more versatile.

[0017] The cylinder body is provided with two elongated guide blocks, which are arranged side by side and spaced apart. The translation plate is disposed between the two guide blocks. Guide grooves are recessed on the opposing end surfaces of the two guide blocks. The front and rear surfaces of the translation plate are respectively provided with raised guide protrusions that cooperate with the guide grooves. The guide protrusions are movably embedded in the corresponding guide grooves. The cooperation between the guide grooves and the guide protrusions guides the movement of the translation plate, ensuring stable left and right translation of the translation plate on the cylinder body.

[0018] Compared with the existing technology, the advantages of the present invention are: a shift fork mechanism is formed by cooperating the shift block, the first rotating shaft and the second rotating shaft, and the structure is simple. The shift block rotates under the drive of the left and right movement of the piston, driving the translation plate to move left and right on the cylinder body. Under the premise of controllable volume, a large stroke and smooth translation of the translation plate are achieved; the piston not only drives the shift block, but also serves as a counterweight in the cylinder body, playing a role in overall dynamic balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention with a hydraulic chuck installed;

[0020] Figure 2 Schematic diagram of the structure of the cylinder body in the present invention;

[0021] Figure 3 This is a front view structural diagram of the present invention with the cylinder body removed;

[0022] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure;

[0023] Figure 5 for Figure 3 Schematic diagram of the decomposition structure;

[0024] Figure 6 It is a schematic diagram of a first cross-sectional structure of the present invention with a hydraulic chuck installed;

[0025] Figure 7 This is a second cross-sectional structural schematic diagram of the present invention with a hydraulic chuck installed. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0027] As shown in the figure, a translation mechanism for driving a fixture to perform translational motion comprises a cylinder body 1 and a translation plate 2 for mounting a fixture A. The translation plate 2 is arranged on the cylinder body 1 so as to be movably moved left and right. A driving structure for driving the translation plate 2 to perform translational motion left and right on the cylinder body 1 is arranged between the cylinder body 1 and the translation plate 2. The driving structure comprises a piston 3, which is arranged in the cylinder body 1 so as to be movably moved left and right. The piston 3 is connected to the translation plate 2 via a toggle block 4, and the opposite ends of the toggle block 4 are respectively a first toggle portion 41 and a second toggle portion 42. A rotating mounting portion 43 is provided between the first toggle portion 41 and the second toggle portion 42. The rotating mounting portion 43 is rotatably arranged in the cylinder body 1. A first rotating shaft 5 is rotatably arranged at the bottom of the translation plate 2 from front to rear. A first clamping groove 411 is recessed at the end of the first toggle portion 41. The first rotating shaft 5 is arranged in the first clamping groove 411. A second rotating shaft 6 is rotatably arranged on the piston 3 from front to rear. A second clamping groove 421 is recessed at the end of the second toggle portion 42. The second rotating shaft 6 is arranged in the second clamping groove 421.

[0028] In this specific embodiment, the two opposite inner end surfaces of the first clamping groove 411 are first clamping end surfaces 4111. The two first clamping end surfaces 4111 are parallel flat end surfaces. The first rotating shaft 5 has a first clamping portion 51 that cooperates with the first clamping groove 411. The first clamping portion 51 is disposed in the first clamping groove 411. First recessed portions 511 are respectively recessed on the two opposite end surfaces of the first clamping portion 51. The bottom end surfaces 5111 of the first recessed portions 511 are flat end surfaces that cooperate with the first clamping end surfaces 4111. One first clamping end surface 4111 is in contact with the bottom end surface 5111 of one first recessed portion 511.

[0029] The two inner end faces opposite to each other in the second clamping groove 421 are second clamping end faces 4211. The two second clamping end faces 4211 are parallel flat end faces. The second rotating shaft 6 has a second clamping portion 61 that cooperates with the second clamping groove 421. The second clamping portion 61 is disposed within the second clamping groove 421. Two opposing end faces of the second clamping portion 61 are respectively recessed with second recessed portions 611. The bottom end faces 6111 of the second recessed portions 611 are flat end faces that cooperate with the second clamping end faces 4211. One second clamping end face 4211 is in contact with the bottom end face 6111 of one second recessed portion 611. The flat end faces within the clamping groove cooperate with the flat end faces of the recessed portions on the rotating shaft to form surface contact, making the contact more stable. Furthermore, during the entire movement process, due to the large contact area of the surface contact, the wear between the toggle block 4 and the rotating shaft is greatly reduced, thereby effectively extending the service life of each component.

[0030] In this embodiment, a mounting shaft 11 is provided in the cylinder body 1 from front to back, and the rotatable mounting portion 43 is rotatably provided on the mounting shaft 11, so as to achieve a stable rotatable installation of the toggle block 4 in the cylinder body 1.

[0031] In this embodiment, there are two pistons 3, spaced apart and arranged in parallel in front and back. The two pistons 3 are connected by a second rotating shaft 6, the ends of which are rotatably mounted on the two pistons 3. The second toggle portion 42 extends between the two pistons 3. The two pistons 3 jointly drive the toggle block 4 to ensure sufficient force to drive the translation plate 2 to translate within the cylinder 1. At the same time, it acts as a balance, ensuring that the toggle block 4 can rotate stably, thereby driving the translation plate 2 to translate stably, effectively preventing tool vibration.

[0032] In this specific embodiment, a guide cavity is provided within cylinder body 1 to guide the left-right movement of piston 3. Piston 3 divides the guide cavity into two independent chambers 10, each of which has an oil port (not shown) connected thereto. An oil circuit switch 9 is provided at the bottom of cylinder body 1. Oil circuit switch 9 has oil supply channels (not shown) connected to the oil ports for supplying oil to the corresponding chambers 10. Oil is supplied to the corresponding chambers 10 through the corresponding oil supply channels within oil circuit switch 9, providing power for the left-right movement of piston 3. The guide cavity provides stable mounting and positioning for piston 3 and guides its left-right movement.

[0033] In this embodiment, the linear distance between the end of the first toggle portion 41 and the central axis of the second rotating shaft 6 is smaller than the linear distance between the end of the second toggle portion 42 and the central axis of the second rotating shaft 6. This design, based on the principle of leverage, ensures that the toggle block 4 has sufficient force to drive the translation plate 2 to perform translational motion.

[0034] In this embodiment, two connecting seats 21 are provided at a distance from each other at the bottom of the translation plate 2. The connecting seats 21 extend into the cylinder body 1, and the first rotating shaft 5 is rotatably mounted between the two connecting seats 21. The two connecting seats 21 provide a stable mounting position for the rotatable mounting of the first rotating shaft 5.

[0035] In this specific embodiment, the cylinder body 1 is provided with an adjustment mechanism for adjusting the translation distance of the translation plate 2;

[0036] The adjustment mechanism includes two positioning blocks 8 fixedly mounted on the cylinder body 1. The two positioning blocks 8 are arranged in parallel and spaced apart on the left and right sides of the translation plate 2. The translation plate 2 can be arranged between the two positioning blocks 8 so as to be translated left and right. An adjustment block 7 is detachably provided on each positioning block 8. The adjustment block 7 includes a horizontally arranged mounting portion 71 and a vertically arranged adjustment portion 72. The upper end of the adjustment portion 72 is connected to the inner end of the mounting portion 71 so that the adjustment block 7 is in an inverted L-shaped structure. The mounting portion 71 is detachably connected to the positioning block 8, and the adjustment portion 72 is fitted on the inner end surface of the positioning block 8. The cooperation between the positioning block 8 and the adjustment block 7 enables precise adjustment of the translation distance of the translation plate 2, thereby making the position accuracy of the translation of the translation plate 2 higher, thereby effectively ensuring the processing accuracy of the workpiece. In the specific adjustment, it is only necessary to select an adjustment block 7 with an adjustment portion 72 of corresponding adjustment thickness, which is simple to operate.

[0037] In this specific embodiment, the positioning block 8 and the adjusting block 7 are both long strip structures.

[0038] In this specific embodiment, the mounting portion 71 is provided with a vertically extending mounting hole 711, and the positioning block 8 is provided with a mounting screw hole 81 coaxial with the mounting hole 711. A screw or bolt (not shown) that matches the mounting screw hole 81 passes through the mounting hole 711 and is threaded into the mounting screw hole 81, thereby achieving detachable mounting of the adjustment block 7 on the positioning block 8. This structure for achieving detachable mounting of the adjustment block 7 and the positioning block 8 is simple, low-cost, and convenient for assembly and disassembly.

[0039] In this specific embodiment, the fixture A and the translation plate 2 are detachably connected, so that the entire translation mechanism has good versatility.

[0040] In this specific embodiment, the cylinder body 1 is provided with two elongated guide blocks 101, which are arranged side by side and spaced apart from each other. The translation plate 2 is disposed between the two guide blocks 101. The opposing end surfaces of the two guide blocks 101 are recessed with guide grooves 1011. The front and rear surfaces of the translation plate 2 are respectively provided with raised guide protrusions 201 that mate with the guide grooves 1011. The guide protrusions 201 are movably embedded in the corresponding guide grooves 1011. The cooperation between the guide grooves 1011 and the guide protrusions 201 guides the movement of the translation plate 2, ensuring stable left and right translation of the translation plate 2 on the cylinder body 1.

[0041] In this embodiment, a mounting base 22 for a hydraulic chuck A is removably mounted on the translation plate 2. Fixture A is a hydraulic chuck. A corresponding hydraulic oil circuit (not shown) is provided within the cylinder 1, and a corresponding conversion oil circuit (not shown) is provided within the positioning block 8. Oil flows through an oil circuit converter 9 into the corresponding hydraulic oil circuit and then through the corresponding conversion oil circuit into the hydraulic chuck, thereby controlling the hydraulic chuck's operation. The hydraulic chuck achieves automated clamping, improving workpiece machining efficiency. The internal oil circuit makes the overall structure compact and small.

Claims

1. A translation mechanism for driving a fixture to perform translational motion, comprising a cylinder body and a translation plate for mounting the fixture, wherein the translation plate is arranged on the cylinder body so as to be translatable left and right, and a driving structure is provided between the cylinder body and the translation plate for driving the translation plate to perform translational motion left and right on the cylinder body, characterized in that The driving structure includes a piston, and the piston is movably arranged in the cylinder body. The piston is connected to the translation plate by a toggle block. The opposite ends of the toggle block are respectively a first toggle part and a second toggle part. A rotating mounting part is provided between the first toggle part and the second toggle part. The rotating mounting part is rotatably arranged in the cylinder body. The bottom of the translation plate is rotatably provided with a first rotating shaft from front to back. The end head of the first toggle part is recessed with a first clamping groove, and the first rotating shaft is arranged in the first clamping groove. The second rotating shaft is rotatably provided on the piston from front to back. The end head of the second toggle part is recessed with a second clamping groove, and the second rotating shaft is arranged in the second clamping groove. A mounting shaft is provided in the cylinder body from front to back, and the rotating mounting portion is rotatably provided on the mounting shaft; The cylinder body is provided with a guide cavity for guiding the left and right movement of the piston. The piston divides the guide cavity into two independent chambers. Each chamber has an oil port connected thereto. The bottom of the cylinder body is provided with an oil circuit converter. The oil circuit converter has an oil supply channel connected to the oil port for supplying oil to the corresponding chamber.

2. A translation mechanism for driving a fixture to perform translational motion as claimed in claim 1, characterized in that The two inner end surfaces opposite to each other in the first clamping groove are first clamping end surfaces, and the two first clamping end surfaces are parallel flat end surfaces to each other. The first rotating shaft has a first clamping portion that matches the first clamping groove, and the first clamping portion is arranged in the first clamping groove. The two opposite end surfaces of the first clamping portion are respectively recessed with first recessed portions, and the bottom end surfaces of the first recessed portions are flat end surfaces that match the first clamping end surfaces, and one first clamping end surface is in contact with the bottom end surface of one first recessed portion. The two opposite inner end faces of the second clamping groove are second clamping end faces, and the two second clamping end faces are flat end faces parallel to each other. The second rotating shaft has a second clamping portion that matches the second clamping groove, and the second clamping portion is arranged in the second clamping groove. The two opposite end faces of the second clamping portion are respectively recessed with second recessed portions, and the bottom end face of the second recessed portion is a flat end face that matches the second clamping end face, and one second clamping end face is in contact with the bottom end face of one second recessed portion.

3. A translation mechanism for driving a fixture to perform translational motion as claimed in claim 1, characterized in that There are two pistons, which are arranged in parallel and spaced apart in front and back. The two pistons are connected by the second rotating shaft. The two ends of the second rotating shaft are rotatably mounted on the two pistons respectively, and the second shifting part extends into and is arranged between the two pistons.

4. A translation mechanism for driving a fixture to perform translational motion as claimed in claim 1, characterized in that The straight-line distance from the end of the first toggle part to the central axis of the second rotating shaft is smaller than the straight-line distance from the end of the second toggle part to the central axis of the second rotating shaft.

5. A translation mechanism for driving a fixture to perform translational motion as claimed in claim 1, characterized in that Two connecting seats are arranged at intervals at the front and rear ends of the bottom of the translation plate. The connecting seats extend into the cylinder body, and the first rotating shaft is rotatably mounted between the two connecting seats.

6. A translation mechanism for driving a fixture to perform translational motion as claimed in claim 1, characterized in that The cylinder body is provided with an adjustment mechanism for adjusting the translation distance of the translation plate; The adjustment mechanism includes two positioning blocks fixedly arranged on the cylinder body, the two positioning blocks are arranged in parallel and spaced apart on the left and right sides of the translation plate, the translation plate can be arranged between the two positioning blocks so as to be translated left and right, and an adjustment block is detachably provided on each of the positioning blocks, the adjustment block includes a horizontally arranged mounting portion and a vertically arranged adjustment portion, the upper end of the adjustment portion is connected to the inner end of the mounting portion so that the adjustment block has an inverted L-shaped structure, the mounting portion is detachably connected to the positioning block, and the adjustment portion is fitted on the inner end surface of the positioning block.

7. A translation mechanism for driving a fixture to perform translational motion as claimed in claim 6, characterized in that The mounting portion is provided with a mounting hole that passes through from top to bottom, and the positioning block is provided with a mounting screw hole coaxial with the mounting hole. The adjusting block is detachably mounted on the positioning block by passing a screw or bolt that matches the mounting screw hole through the mounting hole and screwing it into the mounting screw hole.

8. The translation mechanism for driving a fixture to perform translational motion according to claim 1, characterized in that Two long strip-shaped guide blocks are provided on the cylinder body, and the two guide blocks are arranged side by side and at intervals in front and back. The translation plate is arranged between the two guide blocks, and the opposite end faces of the two guide blocks are recessed with guide grooves. The front end face and the rear end face of the translation plate are respectively convex with guide protrusions that cooperate with the guide grooves, and the guide protrusions can be movably embedded in the corresponding guide grooves.

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