A multi-station rotary table

Abstract

The present invention relates to a multi-station rotary workbench, comprising a frame and a turntable; further comprising a rotary drive unit, which is arranged on the frame and drives the rotation of the turntable; a rotary positioning unit, which comprises a dividing plate, which is coaxially fixed with the turntable; a positioning wheel, which is circumferentially spaced with a plurality of positioning wheels, and the axis of the positioning wheel is parallel to the axis of the dividing plate; a rotary shaft, which is rotatably installed in the frame around its axis, and the axis of the rotary shaft is perpendicular to the axis of the dividing plate; a positioning component, which is fixed on the rotary shaft, and is provided with a positioning groove, which is embedded and matched with a positioning wheel; a positioning drive unit, which is arranged on the frame and drives the rotation of the rotary shaft; wherein the positioning groove is embedded and matched with the positioning wheel to adjust the rotation angle of the turntable, and the positioning wheels can be replaced separately, which is convenient for replacement and reduces maintenance costs, and the manufacturing difficulty of the positioning wheel is low.

Description

Technical Field

[0001] The invention relates to the technical field of rotary worktables, in particular to a multi-station rotary worktable. Background Art

[0002] The rotary table is the core component of the rotary multi-station machine tool. It is used to complete multiple processing steps of parts with one clamping. Currently, there are two types of such tables used in mechanical processing:

[0003] 1. The motor rotates to drive the rotating shaft to make the workbench rotate. When the workbench is in place, the switch sends a signal to the motor to stop, and then the latch is embedded in the rotating shaft to complete the positioning and fixing of the workbench;

[0004] Second, a toothed disc 1 and a toothed disc 2 are coaxially arranged on the rotating shaft and slide along the axis of the rotating shaft. The toothed disc 1 is relatively fixed to the rotating shaft. When the workbench is in place, the toothed disc 2 moves to engage with the toothed disc 1 to complete the positioning and fixation of the workbench.

[0005] The above-mentioned prior art solutions have the following defects:

[0006] In the actual working process, the latch is prone to deformation and damage, which affects the positioning accuracy; although the positioning method of the gear disc one and the gear disc two is accurate, it has high manufacturing requirements, and the above two situations are more complicated problems during maintenance. Summary of the invention

[0007] In view of the shortcomings of the prior art, one of the objects of the present invention is to provide a multi-station rotary workbench, in which the positioning grooves formed between the wedge blocks cooperate with the positioning wheels to accurately position the turntable, and the wedge blocks or the positioning wheels can be replaced separately, reducing the complexity and cost of maintenance.

[0008] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0009] A multi-station rotary workbench, comprising a frame and a turntable;

[0010] Rotation drive unit: set on the frame and drive the rotation of the turntable;

[0011] Rotary positioning unit: included

[0012] Indexing plate: the indexing plate is coaxially fixed with the rotating plate;

[0013] Positioning wheel: A plurality of positioning wheels are arranged at intervals on the dividing plate in the circumferential direction, and the axis of the positioning wheel is parallel to the axis of the dividing plate;

[0014] Rotary shaft: The rotary shaft is installed in the frame to rotate around its axis, and the axis of the rotary shaft is perpendicular to the axis of the indexing plate;

[0015] Positioning assembly: the positioning assembly is fixed on the rotary shaft, and a positioning groove is provided on the positioning assembly, and the positioning groove is embedded and matched with a positioning wheel;

[0016] Positioning drive unit: It is installed on the frame and drives the rotation of the rotary shaft.

[0017] By adopting the above technical solution, when the rotating drive unit stops, the positioning drive unit controls the rotation of the rotating shaft, the positioning assembly rotates synchronously, the positioning groove and the positioning wheel are embedded and matched to adjust the rotation angle of the turntable, while achieving the purpose of locking the rotation of the turntable, and the positioning wheels can be replaced separately, which is convenient for replacement and reduces maintenance costs, and the manufacturing difficulty of the positioning wheels is low.

[0018] In a preferred example, the present invention can be further configured as follows:

[0019] The positioning component includes

[0020] Positioning seat: the positioning seat is coaxially sleeved on the rotating shaft, and a pair of mounting parts extend outwardly from the positioning seat;

[0021] Wedge blocks: The wedge blocks are detachably provided on one side opposite to the mounting portion, and the positioning grooves are formed between the wedge blocks;

[0022] Limiting ring: A pair of limiting rings are coaxially arranged on the rotating shaft, and the limiting rings are respectively abutted against the two ends of the axial direction of the positioning seat;

[0023] A maintenance opening is provided on one side of the frame close to the positioning assembly.

[0024] In a preferred example, the present invention can be further configured as follows:

[0025] The positioning seat includes

[0026] A pair of ring bodies: the ring bodies are sleeved on the rotary shaft, and each of the ring bodies is provided with a mounting portion;

[0027] Fixed half ring: the fixed half ring is integrally and coaxially fixed between the ring bodies;

[0028] Elastic half ring: the elastic half ring comprises a fixed end and a movable end, the fixed end is fixedly connected to one end of the fixed half ring;

[0029] When the movable end of the elastic half ring approaches the fixed half ring, the elastic half ring presses the rotary shaft.

[0030] In a preferred example, the present invention can be further configured as follows: a key block is provided on the rotating shaft, a key groove is provided on the inner side of the positioning seat, and the key groove penetrates the ring body and the fixed half ring along the axial direction of the positioning seat.

[0031] In a preferred example, the present invention can be further configured as follows: the opposite sides of the wedge blocks are set at an acute angle, the positioning groove forms a large notch and a small notch, the large notch is larger than the diameter of the positioning wheel and is set toward the positioning wheel, and the small notch is smaller than the diameter of the positioning wheel and is set away from the positioning wheel.

[0032] In a preferred example, the present invention can be further configured as follows: a limiting portion is provided on the side of the mounting portion facing the wedge block, a limiting groove is provided on the side of the wedge block facing the mounting portion and is slidably embedded with the limiting portion, and a fixing bolt is passed between the mounting portion and the wedge block.

[0033] In a preferred example, the present invention can be further configured as follows: a mounting groove is provided at one end of the mounting portion away from the rotating shaft, a limiting strip is embedded in the mounting groove, and one end of the limiting strip forms the limiting portion.

[0034] In a preferred example, the present invention can be further configured as follows:

[0035] The positioning drive unit comprises:

[0036] Mounting seat: The mounting seat is fixed on the frame on one side of the axis direction of the rotary shaft;

[0037] Positioning cylinder: the cylinder body of the positioning cylinder is hinged to the mounting seat, and the hinge axis of the positioning cylinder is parallel to the axis of the rotary shaft;

[0038] Articulated head: coaxially fixed on the rotary shaft, and the articulated head is articulated with the piston end of the positioning cylinder.

[0039] In a preferred example, the present invention can be further configured as follows:

[0040] Also includes:

[0041] Locking cylinder: fixed on the frame, and the piston end of the locking cylinder is extended and retracted along the radial direction of the vertical turntable;

[0042] Friction component: used for squeezing the arc surface of the turntable, the friction component is arranged at the piston end of the locking cylinder.

[0043] In a preferred example, the present invention can be further configured as follows:

[0044] The rotary drive unit comprises:

[0045] Rotating motor: installed on the frame to output torque;

[0046] Reduction gear set: set in the frame, used to transmit the torque of the rotating motor to the turntable.

[0047] In summary, the present invention includes at least one of the following beneficial technical effects:

[0048] 1. The rotary shaft drives the positioning assembly to rotate, and the positioning groove cooperates with the positioning wheel to achieve stable and accurate positioning of the turntable;

[0049] 2. The wedge block and the positioning wheel can be replaced separately, which is convenient for maintenance and reduces maintenance costs;

[0050] 3. The cooperation between the limit strip and the wedge block can adjust the positioning groove and improve the positioning accuracy of the turntable;

[0051] 4. The setting of the locking cylinder and the friction part reduces the rotation angle of the turntable caused by inertia and ensures the matching positioning of the turntable between the positioning groove and the positioning wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the general assembly of a multi-station rotary workbench;

[0053] Figure 2 It is a schematic diagram used to reflect the location of the maintenance port and the rotation positioning unit;

[0054] Figure 3 is a schematic diagram for reflecting the structure of the rotary drive unit;

[0055] Figure 4 It is a schematic diagram of the general assembly structure of the linear rotation positioning unit;

[0056] Figure 5 It is a schematic diagram used to reflect the structure of the rotary axis;

[0057] Figure 6 It is a schematic diagram used to reflect the structure of the positioning seat.

[0058] In the figure, A1, rack; A11, maintenance port; A2, turntable;

[0059] B1, rotary drive unit; B2, rotary motor; B3, driving gear; B4, reduction gear 1; B5, reduction gear 2; B6, driven gear;

[0060] C1, rotary positioning unit; C2, indexing plate; C3, positioning wheel; C4, rotary shaft; C41, key block; C5, positioning seat; C51, ring body; C52, fixed half ring; C53, elastic half ring; C56, mounting part; C54, limit strip; C55, keyway; C6, wedge block; C61, limit slot; C7, positioning slot; C8, limit ring;

[0061] D1, positioning drive unit; D2, mounting seat; D3, positioning cylinder; D4, hinged joint;

[0062] E1, locking rotation unit; E2, locking cylinder; E3, friction part. DETAILED DESCRIPTION

[0063] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0064] like Figure 1 and Figure 2 As shown, a multi-station rotary workbench includes a frame A1 and a turntable A2, in which a rotation drive unit B1, a rotation positioning unit C1 and a positioning drive unit D1 are also arranged, wherein the rotation drive unit B1 provides the power required for the turntable A2 to rotate, the rotation positioning unit C1 is used to adjust the position of the turntable A2 when it stops and to fix the turntable A2, and the positioning drive unit D1 is used to provide power for the rotation positioning unit C1.

[0065] like Figure 1 As shown, the frame A1 is hollow, the turntable A2 is a rotating body structure, and the rotation axis of the turntable A2 extends in the vertical direction. Bearings for cooperating with the turntable A2 are respectively provided at the top and bottom of the frame A1, thereby ensuring the rotation center of the turntable A2.

[0066] like Figure 3 As shown, the rotary drive unit B1 includes a rotary motor B2, a driving gear B3 is coaxially fixed at the rotating end of the rotary motor B2, a driven gear B6 is coaxially fixed on the outer side of the turntable A2, and a coaxially connected reduction gear 1 B4 and a reduction gear 2 B5 are also rotatably arranged in the frame A1, wherein the driving gear B3 has a smaller diameter than the reduction gear 1 B4, and the reduction gear 2 B5 has a smaller diameter than the driven gear B6. The driving gear B3, the reduction gear 1 B4, the reduction gear 2 B5 and the driven gear B6 constitute a reduction gear group, and the torque output by the rotary motor B2 is transmitted to the turntable A2 through the reduction gear group to realize the rotation of the turntable A2.

[0067] like Figure 4-6 As shown, the rotary positioning unit C1 includes a dividing plate C2 coaxially fixed to the outside of the turntable A2, a plurality of rotating columns are embedded on the dividing plate C2 at equal intervals in the circumferential direction, a positioning wheel C3 is coaxially fixed to the lower end of the rotating column, a baffle is provided on the upper end of the rotating column, the baffle and the rotating column are fixed by screws, and the baffle and the dividing plate C2 are in sliding contact, so that the positioning wheel C3 and the dividing plate C2 are relatively fixed, and a rotary shaft C4 is also installed in the frame A1, and the axis of the rotary shaft C4 is extended in the horizontal direction, and the two ends of the rotary shaft C4 are coaxially fixed to the frame A1, and a positioning component is fixed on the rotary shaft C4, and the positioning component and the rotary shaft C4 are both located below the dividing plate C2, and a positioning groove C7 is formed on the positioning component;

[0068] When the turntable A2 stops rotating, the rotary shaft C4 is controlled to rotate in the direction of the positioning wheel C3, and the positioning wheel C3 is embedded in the positioning groove C7, thereby correcting the position of the turntable A2 and limiting the rotation of the turntable A2, thereby realizing the positioning and fixation of the turntable A2.

[0069] The positioning assembly includes a positioning seat C5 and a wedge block C6. The positioning seat C5 is coaxially fixedly sleeved on the rotating shaft C4, and a pair of limiting rings are sleeved and fixed on the rotating shaft C4. The limiting rings respectively abut and block the two ends of the positioning seat C5 in the axial direction. A pair of mounting parts C56 are also extended on the positioning seat C5. The wedge blocks C6 are arranged on the opposite side of the mounting parts C56. The positioning grooves C7 are formed between the wedge blocks C6, and the opposite sides of the wedge blocks C6 are arranged at an acute angle, so that the positioning grooves C7 are V-shaped and form a large notch and a small notch. The large notch is larger than the diameter of the positioning wheel C3, and the small notch is smaller than the diameter of the positioning wheel C3, and the large notch faces the positioning wheel C3.

[0070] When the rotary shaft C4 rotates, the large notch enables the positioning wheel C3 to stably enter the positioning groove C7, and in the process of sliding contact between the wedge block C6 and the positioning wheel C3, the rotation angle of the turntable A2 is adjusted to achieve positioning and fixing of the turntable A2.

[0071] Combination Figure 6 The positioning seat C5 is composed of a pair of ring bodies C51, a fixed half ring C52 and an elastic half ring C53, wherein the ring body C51 is coaxially sleeved outside the rotating shaft C4, the fixed half ring C52 is coaxially fixed between the ring bodies C51, and the elastic half ring C53 includes a fixed end connected to one end of the fixed half ring C52 and an automatically movable end. Bolts are used to connect the movable end of the elastic half ring C53 and the fixed half ring C52. When the movable end of the elastic half ring C53 is close to the fixed half ring C52, the elastic half ring C53 squeezes the rotating shaft C4 to lock the positioning seat C5 to rotate, so that the positioning component can stably abut against the limiting positioning wheel C3 to achieve stable positioning and lock the rotation of the turntable A2.

[0072] A key block C41 is embedded on the rotating shaft C4, and a key groove C55 is opened on the inner side of the positioning seat C5. The key groove C55 extends along the axial direction of the positioning seat C5, and the key groove C55 penetrates the fixed half ring C52 and the ring body C51. When the positioning seat C5 is sleeved on the rotating shaft C4, the key block C41 and the key groove C55 are embedded and matched, thereby limiting the installation angle of the positioning seat C5 on the rotating shaft C4, ensuring the stable fit between the positioning groove C7 and the positioning wheel C3.

[0073] Combination Figure 6The wedge block C6 and the mounting portion C56 are detachably connected by bolts, and a maintenance port A11 is provided on the frame A1, through which the wedge block C6 can be conveniently replaced. A mounting groove is provided at one end of the mounting seat D2 away from the rotary shaft C4, and a limiting strip C54 is embedded in the mounting groove. The limiting strip C54 extends and slides along the axial direction of the rotary shaft C4, and one end of the limiting strip C54 is inserted between the mounting portion C56 to form a limiting portion. A limiting groove C61 is provided on the side of the wedge block C6 facing the mounting portion C56, and the limiting portion is slidably embedded in the limiting groove C61, so that the mounting portion C56 and the wedge block C6 are conveniently fixed by bolts, and the size of the positioning groove C7 can be changed by adjusting the length of the limiting portion, so as to ensure the coordination stability between the positioning groove C7 and the positioning wheel C3.

[0074] like Figure 1 As shown, the positioning drive unit D1 includes a mounting seat D2 fixed on the frame A1 and a hinge joint D4 fixed to one end of the rotating shaft C4, a positioning cylinder D3 is installed between the mounting seat D2 and the hinge joint D4, the cylinder body of the positioning cylinder D3 is hinged on the mounting seat D2, the piston end of the positioning cylinder D3 is hinged on the hinge joint D4, and the hinge axis of the positioning cylinder D3 is parallel to the axis of the rotating shaft C4; when the piston end of the positioning cylinder D3 extends, the rotating shaft C4 rotates, and the positioning wheel C3 is separated from the positioning groove C7; when the piston end of the positioning cylinder D3 contracts, the rotating shaft C4 rotates, and the positioning wheel C3 is embedded and matched with the positioning groove C7, so as to achieve stable positioning and limit the position and rotation of the turntable A2.

[0075] like Figure 1 As shown, a locking rotation unit E1 is also provided on the frame A1, and the locking rotation unit E1 includes a pair of locking cylinders E2, and the locking cylinders E2 are respectively located at opposite ends of the radial direction of the turntable A2, and a friction member is fixed at the piston end of the locking cylinder E2, and the friction member is in the shape of an arc-shaped sheet; when the rotating motor B2 stops working, the piston end of the locking cylinder E2 is controlled to extend, so that the friction member is squeezed with the outer side of the turntable A2, thereby effectively reducing the further rotation distance of the turntable A2 due to inertia, and then cooperate with the rotation positioning unit C1 to achieve the purpose of stably fixing the turntable A2, and ensure that the processing on the turntable A2 can be carried out.

[0076] The implementation principle of this embodiment is:

[0077] When switching the processing station, the rotary motor B2 is started, and the turntable A2 is rotated through the reduction gear to complete the switching of the processing station;

[0078] When the rotating motor B2 stops, the piston end of the locking cylinder E2 extends, and the friction member is pressed against the turntable A2 to prevent the turntable A2 from continuing to rotate. At the same time, the piston end of the positioning cylinder D3 contracts, so that the rotary shaft C4 rotates, the positioning assembly rotates synchronously, and the wedge C6 slides and abuts against the positioning wheel C3, thereby adjusting the rotation angle of the turntable A2 and locking the rotation of the turntable A2.

[0079] When the positioning wheel C3 or the wedge block C6 is damaged, it is only necessary to replace the damaged positioning wheel C3 and the wedge block C6 separately.

[0080] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-station rotary workbench, comprising a frame (A1) and a turntable (A2); characterized in that: Also includes Rotation drive unit (B1): is set on the frame (A1) and drives the rotation of the turntable (A2); Rotary positioning unit (C1): included Indexing plate (C2): the indexing plate (C2) is coaxially fixedly arranged with the rotating plate (A2); Positioning wheels (C3): a plurality of positioning wheels (C3) are arranged at intervals in the circumferential direction on the indexing plate (C2), and the axes of the positioning wheels (C3) are parallel to the axis of the indexing plate (C2); Rotating shaft (C4): the rotating shaft (C4) is installed in the frame (A1) so as to rotate around its axis, and the axis of the rotating shaft (C4) is perpendicular to the axis of the indexing plate (C2); Positioning component: the positioning component is fixed on the rotary shaft (C4), and a positioning groove (C7) is provided on the positioning component, and the positioning groove (C7) is embedded and matched with a positioning wheel (C3); Positioning drive unit (D1): is arranged on the frame (A1) and drives the rotation of the rotary shaft (C4); The positioning component includes Positioning seat (C5): the positioning seat (C5) is coaxially sleeved on the rotary shaft (C4), and a pair of mounting portions (C56) extend from the outer side of the positioning seat (C5); Wedge blocks (C6): the wedge blocks (C6) are detachably provided on opposite sides of the mounting portion (C56), and the positioning grooves (C7) are formed between the wedge blocks (C6); Limiting rings: A pair of limiting rings are coaxially arranged on the rotating shaft (C4), and the limiting rings are respectively abutted against two ends of the axial direction of the positioning seat (C5); A maintenance opening (A11) is provided on one side of the frame (A1) close to the positioning assembly; The positioning seat (C5) includes A pair of ring bodies (C51): the ring bodies (C51) are sleeved on the rotary shaft (C4), and each of the ring bodies (C51) is provided with a mounting portion (C56); Fixed half ring (C52): the fixed half ring (C52) is integrally and coaxially fixed between the ring bodies (C51); Elastic half ring (C53): the elastic half ring (C53) comprises a fixed end and a movable end, the fixed end being fixedly connected to one end of the fixed half ring (C52); When the movable end of the elastic half ring (C53) approaches the fixed half ring (C52), the elastic half ring (C53) presses the rotary shaft (C4); The positioning drive unit (D1) comprises: Mounting seat (D2): the mounting seat (D2) is fixed on the frame (A1) on one side of the axis direction of the rotary shaft (C4); Positioning cylinder (D3): the cylinder body of the positioning cylinder (D3) is hinged to the mounting seat (D2), and the hinge axis of the positioning cylinder (D3) is parallel to the axis of the rotary shaft (C4); An articulated head (D4): coaxially fixed on the rotary shaft (C4), and the articulated head is hingedly connected to the piston end of the positioning cylinder (D3); Also includes: Locking cylinder (E2): fixed on the frame (A1), and the piston end of the locking cylinder (E2) is radially extended and retracted along the vertical turntable (A2); Friction piece: used for squeezing the arc surface of the rotating disk (A2), the friction piece is arranged at the piston end of the locking cylinder (E2).

2. The multi-station rotary table according to claim 1, characterized in that: A key block (C41) is arranged on the rotary shaft (C4), a key groove (C55) is arranged inside the positioning seat (C5), and the key groove (C55) penetrates the ring body (C51) and the fixed half ring (C52) along the axial direction of the positioning seat (C5).

3. The multi-station rotary table according to claim 1, characterized in that: The opposite sides of the wedge blocks (C6) are arranged at an acute angle, and the positioning groove (C7) forms a large notch and a small notch, the large notch is larger than the diameter of the positioning wheel (C3) and is arranged toward the positioning wheel (C3), and the small notch is smaller than the diameter of the positioning wheel (C3) and is arranged away from the positioning wheel (C3).

4. A multi-station rotary workbench according to claim 1 or 3, characterized in that: A limiting portion is arranged on one side of the mounting portion (C56) facing the wedge block (C6), a limiting groove (C61) is provided on one side of the wedge block (C6) facing the mounting portion (C56) and is slidably embedded with the limiting portion, and a fixing bolt is passed between the mounting portion (C56) and the wedge block (C6).

5. The multi-station rotary table according to claim 4, characterized in that: An installation groove is provided at one end of the installation portion (C56) away from the rotating shaft (C4), a limiting strip (C54) is embedded in the installation groove, and one end of the limiting strip (C54) forms the limiting portion.

6. The multi-station rotary table according to claim 1, characterized in that: The rotary drive unit (B1) comprises: Rotating motor (B2): installed on the frame (A1) to output torque; Reduction gear set: set in the frame (A1) and used to transmit the torque of the rotating motor (B2) to the turntable (A2).

Images