Milling clamp for automobile part planet support window
By using the technical means of vertical fixture mounting in the milling and processing of automobile parts, combined with the center and angular positioning mechanism, the problems of inconsistent height of the planetary bracket and the risk of clamping hands are solved, and higher processing accuracy and efficiency are achieved.
Patent Information
- Application Number
- CN202420757695.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-12
AI Technical Summary
During the milling and processing of automotive parts, the three windows of the planetary bracket are inconsistent in height, and traditional horizontal fixtures have problems such as clamping risks and uneven stress, which affects the processing accuracy and efficiency.
Vertical clamping is adopted, through the combination of the central positioning mechanism and the angular positioning mechanism, the structures of the oil cylinder, output shaft, clamping block and limiting plate are used to realize vertical clamping and angular positioning of the workpiece to ensure the consistency of the window height and Processing accuracy.
The fixing quality of the workpiece is improved, the consistency of the three windows is ensured, the risk of clamping is avoided, and the accuracy and efficiency of milling processing is improved.
Smart Images
Figure CN222289396U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile component milling processing, in particular to a planetary bracket window milling fixture for automobile components. Background Art
[0002] Planetary gears refer to a gear system that, in addition to being able to rotate around its own axis like a fixed-axis gear, also has its axis rotate around the axis of other gears along with the planetary carrier. A planetary carrier is a device used to support and fix a planetary gear system. At present, the precision requirements for planetary carriers in automotive transmissions are relatively high, and the workpiece is prone to movement during milling, and the height consistency of the three windows on the workpiece surface is difficult to ensure.
[0003] The patent document with patent publication number: CN218904353U discloses a milling tool for the window of a planetary bracket in an automobile transmission, including a placement base plate, a milling fixture assembly is arranged on the upper surface of the placement base plate, and a collecting assembly is arranged inside the placement base plate. The utility model obtains the product center by clamping the outer diameter of the planetary gear bracket body with a rear-pull chuck, and then uses the internal control reinforcement ribs of the blank as angular positioning to determine the circumferential position of the window. Finally, the sequence valve is used to adjust the clamping sequence of the angular coarse positioning assembly and the rear-pull chuck to realize the action of angular positioning first and then clamping. The telescopic mechanism links the internal angular coarse positioning assembly to effectively ensure the position accuracy of the planetary bracket window milling.
[0004] The above solution adopts horizontal clamping, and manual straightening is required when positioning the workpiece, which poses a risk of pinching the hand during clamping. In addition, due to the influence of the horizontal clamping direction, if the processing base surface is uneven or the force is uneven when the fixture contacts the workpiece horizontally, the height consistency of the three windows of the workpiece is difficult to ensure. Utility Model Content
[0005] In order to overcome the above technical problems, the purpose of the utility model is to provide a planetary bracket window milling fixture for automotive parts, which solves the problem of inconsistent heights of three windows on the workpiece surface during milling of the current planetary bracket.
[0006] The purpose of the utility model can be achieved through the following technical solutions: a milling fixture for a planetary bracket window of an automobile component, used for clamping and limiting a workpiece, comprising a base plate, on which a center positioning mechanism and an angular positioning mechanism are coaxially mounted, the workpiece is sleeved on the outside of the angular positioning mechanism, the angular positioning mechanism comprises a limit plate movably engaged with the inner cavity of the workpiece, the center positioning mechanism comprises a plurality of clamping blocks movably arranged on the outside of the workpiece at circumferential intervals, and the clamping blocks can move along an inclined direction toward the axis of the workpiece.
[0007] Furthermore, a through hole is formed in the middle of the workpiece, which passes through the upper and lower parts, and a plurality of windows connected to the through hole are opened on the surface of the workpiece. The windows extend radially toward the axis of the workpiece to form petal ends, and a step groove is formed on the outer wall of the workpiece corresponding to the intersection of its diameter change.
[0008] Furthermore, the center positioning mechanism includes an oil cylinder 1 installed above the base plate, the oil cylinder 1 is connected to a plurality of output shafts 1 arranged at equal intervals in the circumferential direction, the top of the output shaft 1 is connected to the clamping block, the output shaft 1 is in an inclined state relative to the horizontally arranged oil cylinder 1, the inclination direction of the output shaft 1 intersects with the axial direction of the oil cylinder 1, and the top end of the output shaft 1 is relatively far away from the axis of the oil cylinder 1, and the bottom end of the output shaft 1 is relatively close to the axis of the oil cylinder 1.
[0009] Furthermore, a guide portion is arranged above the oil cylinder 1, and a guide groove is formed on the guide portion corresponding to the motion trajectory of the output shaft 1, and the guide groove is used to guide and support the extension and retraction of the output shaft 1.
[0010] Furthermore, a clamping plate is provided at a position where the clamping block contacts the surface of the workpiece, and a surface of the clamping plate in contact with the workpiece is an arc-shaped surface.
[0011] Furthermore, a support plate is coaxially mounted on the lower end of the angular positioning mechanism, and a top surface of the support plate is formed with fixed feet for supporting and limiting the position of the workpiece.
[0012] Furthermore, the angular positioning mechanism includes a fixed rod and a second cylinder installed on the top of the support plate, the upper end of the fixed rod is rotatably connected to a rotating part through an axle pin, a limit plate is connected above the rotating part, the second cylinder is located below the rotation trajectory of the rotating part, the second cylinder is upwardly connected to a second output shaft, after the second output shaft is extended, it abuts against the rotating part and drives the rotating part to rotate about the axle pin, and the limit plate abuts against the petal end of the inner cavity of the workpiece to limit the position after rotating a certain angle.
[0013] Furthermore, a vertical positioning mechanism is also arranged outside the center positioning mechanism, and the vertical positioning mechanism includes a plurality of oil cylinders three circumferentially spaced outside the workpiece, an output shaft three and a fixed block are connected above the oil cylinder three, the top of the output shaft three is rotatably connected to one end of a rotating rod, the fixed block and the middle part of the rotating rod are movably connected by a connecting rod, and the rotating rod abuts against the step groove to limit the position after rotating a certain angle.
[0014] Furthermore, it also includes a sequence valve, and the sequence valve is used to control the action sequence between the plurality of output shafts three.
[0015] Furthermore, it also includes a pressure gauge, which is used to measure the pressure of the oil cylinder three.
[0016] The beneficial effects of the utility model are as follows: compared with the traditional method, the technical solution changes the horizontal clamping into vertical clamping, thereby improving the fixing quality of the workpiece, more effectively ensuring the consistency of the height of the three windows, which is conducive to the smooth progress of the milling process, and the reasonable structure arrangement improves the processing accuracy and processing efficiency, and completely avoids the risk of pinching the hand when clamping the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The utility model is further described below in conjunction with the accompanying drawings.
[0018] Figure 1 This is a three-dimensional view of the utility model when clamping a workpiece;
[0019] Figure 2 It is a three-dimensional view of the workpiece in the utility model;
[0020] Figure 3 This is a three-dimensional view of the utility model after the guide part is hidden;
[0021] Figure 4 It is a three-dimensional view of the local structure of the center positioning mechanism in the utility model;
[0022] Figure 5 It is a three-dimensional view of the angular positioning mechanism in the utility model;
[0023] Figure 6 This is a three-dimensional view of the angular positioning mechanism of the utility model after the housing is hidden;
[0024] Figure 7 It is a three-dimensional view of the vertical positioning mechanism in the utility model.
[0025] In the figure: 1. bottom plate; 2. center positioning mechanism; 21. oil cylinder one; 22. output shaft one; 23. guide part; 24. clamping block; 25. clamping plate; 3. support plate; 4. angular positioning mechanism; 41. fixing rod; 42. oil cylinder two; 43. output shaft two; 44. shaft pin; 45. rotating part; 46. limit plate; 47. housing; 5. sequence valve; 6. vertical positioning mechanism; 61. oil cylinder three; 62. output shaft three; 63. fixing block; 64. rotating rod; 65. connecting rod; 7. pressure gauge; 8. workpiece; 81. window; 82. petal end; 83. step groove. DETAILED DESCRIPTION
[0026] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example
[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a milling fixture for a planetary bracket window of an automobile component is used to clamp and limit a workpiece 8. The fixture includes a base plate 1, on which a center positioning mechanism 2 and an angular positioning mechanism 4 are coaxially mounted. The angular positioning mechanism 4 is located above the center positioning mechanism 2, and the workpiece 8 is sleeved on the outside of the angular positioning mechanism 4.
[0028] like Figure 2 As shown, the workpiece 8 processed by this scheme has a through hole penetrating upward and downward formed in the middle, and three windows 81 connected to the through hole are opened on the surface of the workpiece 8. The window 81 extends radially toward the axis of the workpiece 8 to form a petal end 82. Since the outer diameter of the workpiece 8 is different from top to bottom, a step groove 83 is formed at the intersection of the change of large and small diameters of the workpiece 8.
[0029] like Figure 1 , Figure 3 , Figure 4 As shown, the center positioning mechanism 2 includes a cylinder 21 installed above the base plate 1, and the cylinder 21 is connected to three output shafts 22 that are circumferentially evenly spaced about its axis. The top of the output shaft 22 is connected to a clamping block 24, and the output shaft 22 is in an inclined state relative to the horizontally arranged cylinder 21 and the base plate 1. The inclined direction of the output shaft 22 intersects with the axial direction of the cylinder 21, and the top end of the output shaft 22 is relatively far away from the axis of the cylinder 21, and the bottom end of the output shaft 22 is relatively close to the axis of the cylinder 21. This design enables the three clamping blocks 24 to gradually move toward the axis center of the cylinder 21 when the output shaft 22 moves from top to bottom. Since the workpiece 8 is also located on the axis center of the cylinder 21, the three clamping blocks 24 can simultaneously clamp and limit the workpiece 8 from different directions.
[0030] like Figure 1 , Figure 3 As shown, a guide portion 23 is provided above the oil cylinder 21 , and a guide groove is formed on the guide portion 23 corresponding to the motion trajectory of the output shaft 22 , and the guide groove is used to guide and support the contraction of the output shaft 22 .
[0031] like Figure 4 As shown, a clamping plate 25 is provided at the position where the clamping block 24 contacts the surface of the workpiece 8. The surface of the clamping plate 25 in contact with the workpiece 8 is an arc surface, and the clamping plate 25 is made of elastic material, so that the limit is more stable after the clamping plate 25 contacts the workpiece 8.
[0032] like Figure 1 , Figure 3 , Figure 5 , Figure 6 As shown, a support plate 3 is coaxially mounted on the lower end of the angular positioning mechanism 4, and a fixed foot for supporting and limiting the position of the workpiece 8 is formed on the top surface of the support plate 3, and the fixed foot protrudes upward to support and position the workpiece 8, and the angular positioning mechanism 4 includes a fixed rod 41 and a second cylinder 42 installed on the top of the support plate 3, and the upper end of the fixed rod 41 is rotatably connected to a rotating member 45 through an axle pin 44, and a limiting plate 46 is connected above the rotating member 45, and the second cylinder 42 is located below the rotating trajectory of the rotating member 45, and the second cylinder 42 is upwardly connected to an output shaft 43, and after the output shaft 43 is extended, it abuts against the rotating member 45 and drives the rotating member 45 to rotate about the axle pin 44.
[0033] In this solution, the angular positioning mechanism 4 also includes a shell 47, which is sleeved on the outside of the fixing rod 41 and the cylinder 42, and the outline of the shell 47 is smaller than the hole of the workpiece 8, so that the workpiece 8 can be sleeved on the outside of the shell 47.
[0034] When the present clamp is clamping the workpiece 8, since the output shaft 2 43 is not in contact with the rotating member 45, the rotating member 45 is in an inclined state and the limit plate 46 is also in an inclined state. At this time, the workpiece 8 is mounted on the support plate 3 from top to bottom. At this time, the angular positioning mechanism 4 is located inside the workpiece 8 and begins to limit the workpiece 8. The oil cylinder 2 42 is started, the output shaft 2 43 is lifted and in contact with the rotating member 45, driving the rotating member 45 and the limit plate 46 to rotate about the axle pin 44 until the limit plate 46 is in contact with the petal end 82, angularly positioning the workpiece 8 to ensure the accurate angular position of the workpiece 8 during the machining process, thereby ensuring the accuracy and consistency of the machining. Subsequently, the oil cylinder 1 21 is started, and the three output shafts 1 22 move from top to bottom, and the three clamping blocks 24 gradually move toward the axis center of the oil cylinder 1 21 until the three clamping plates 25 are in contact with the outer wall of the workpiece 8, determining the center of the workpiece 8, and preventing the workpiece 8 from shaking during the machining process.
[0035] This solution changes the horizontal clamping into vertical clamping, and uses the angular positioning mechanism 4 to angularly position the workpiece 8 to determine the circumferential position of the window 81, and then uses the center positioning mechanism 2 to clamp the outer diameter of the workpiece 8 to obtain the product center, thereby improving the fixing quality of the workpiece 8 and facilitating the smooth progress of the milling process. The reasonable structural setting improves the processing accuracy and efficiency, and completely avoids the risk of pinching the hand when clamping the workpiece 8. Example
[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, a milling fixture for a planetary bracket window of an automobile component is used to clamp and limit a workpiece 8, including a base plate 1, on which a center positioning mechanism 2 and an angular positioning mechanism 4 are coaxially mounted, the workpiece 8 is sleeved outside the angular positioning mechanism 4, the angular positioning mechanism 4 includes a limit plate 46 movably engaged with the inner cavity of the workpiece 8, the center positioning mechanism 2 includes a plurality of clamping blocks 24 movably arranged outside the workpiece 8 at circumferential intervals, and the clamping blocks 24 can move toward the axis of the workpiece 8 along an inclined direction. Compared with the first embodiment, the difference of this embodiment is that: Figure 1 , Figure 7 As shown, a vertical positioning mechanism 6 is also provided outside the center positioning mechanism 2. The vertical positioning mechanism 6 includes three cylinders 61 circumferentially spaced apart and arranged outside the workpiece 8. An output shaft 62 and a fixed block 63 are connected above the cylinder 61. The top of the output shaft 62 is rotatably connected to one end of a rotating rod 64. The fixed block 63 and the middle part of the rotating rod 64 are movably connected by a connecting rod 65. After the rotating rod 64 rotates a certain angle, the tail end of the rotating rod 64 abuts against the step groove 83 to limit the position.
[0037] After the angular positioning mechanism 4 and the center positioning mechanism 2 limit the workpiece 8, the cylinder three 61 is started, and the output shaft three 62 is lifted upward. Under the limitation of the output shaft three 62 and the connecting rod 65, the tail end of the rotating rod 64 moves from top to bottom toward the workpiece 8 until the step groove 83 at the tail end of the rotating rod 64 abuts, applying pressure to the workpiece 8 from top to bottom to prevent the workpiece 8 from moving up and down during processing, thereby effectively ensuring the height consistency of the three windows 81 of the workpiece 8.
[0038] The present solution also includes a sequence valve 5, which is used to control the action sequence between the multiple output shafts three 62, so that the clamping is more stable and reliable. The present solution also includes a pressure gauge 7, which is used to measure the pressure of the oil cylinder three 61 to ensure that the oil pressure is within a safe applicable range.
[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0040] The above contents are merely examples and explanations of the present utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present utility model.
Claims
1. A milling fixture for a planetary bracket window of an automobile component, used for clamping and limiting a workpiece, comprising a bottom plate, characterized in that: A center positioning mechanism and an angular positioning mechanism are coaxially mounted on the base plate, the workpiece is sleeved outside the angular positioning mechanism, the angular positioning mechanism includes a limit plate movably engaged with the inner cavity of the workpiece, and the center positioning mechanism includes a plurality of clamping blocks movably arranged outside the workpiece at circumferential intervals, and the clamping blocks can move toward the axis of the workpiece along an inclined direction.
2. The milling fixture for the planetary bracket window of an automobile component according to claim 1 is characterized in that: A through hole is formed in the middle of the workpiece, and a plurality of windows connected to the through hole are opened on the surface of the workpiece. The windows extend radially toward the axis of the workpiece to form petal ends. A step groove is also formed on the outer wall of the workpiece at the intersection where its diameter changes.
3. The milling fixture for the planetary bracket window of an automobile component according to claim 2 is characterized in that: The center positioning mechanism includes an oil cylinder 1 installed above the base plate, the oil cylinder 1 is connected to a plurality of output shafts 1 arranged at equal intervals in the circumferential direction, the top of the output shaft 1 is connected to the clamping block, the output shaft 1 is in an inclined state relative to the horizontally arranged oil cylinder 1, the inclination direction of the output shaft 1 intersects with the axial direction of the oil cylinder 1, and the top end of the output shaft 1 is relatively far away from the axis of the oil cylinder 1, and the bottom end of the output shaft 1 is relatively close to the axis of the oil cylinder 1.
4. The milling fixture for the planetary bracket window of an automobile component according to claim 3 is characterized in that: A guide portion is arranged above the oil cylinder 1, and a guide groove is formed on the guide portion corresponding to the motion track of the output shaft 1, and the guide groove is used to guide and support the extension and retraction of the output shaft 1.
5. The milling fixture for the planetary bracket window of an automobile component according to claim 3 is characterized in that: A clamping plate is provided at the position where the clamping block contacts the surface of the workpiece, and the surface of the clamping plate in contact with the workpiece is an arc-shaped surface.
6. The milling fixture for the planetary bracket window of an automobile component according to claim 2, characterized in that: A support plate is coaxially mounted on the lower end of the angular positioning mechanism, and a top surface of the support plate is formed with fixed feet for supporting and limiting the position of the workpiece.
7. The milling fixture for the planetary bracket window of an automobile component according to claim 6, characterized in that: The angular positioning mechanism includes a fixed rod and a second cylinder installed on the top of the support plate. The upper end of the fixed rod is rotatably connected to a rotating part through an axle pin. A limit plate is connected above the rotating part. The second cylinder is located below the rotating trajectory of the rotating part. The second cylinder is upwardly connected to a second output shaft. After extending, the second output shaft abuts against the rotating part and drives the rotating part to rotate about the axle pin. After rotating a certain angle, the limit plate abuts against the petal end of the inner cavity of the workpiece to limit the position.
8. The milling fixture for the planetary bracket window of an automobile component according to claim 2, characterized in that: A vertical positioning mechanism is also provided outside the center positioning mechanism, and the vertical positioning mechanism includes a plurality of oil cylinders three circumferentially spaced outside the workpiece, an output shaft three and a fixed block are connected above the oil cylinder three, the top of the output shaft three is rotatably connected to one end of a rotating rod, the fixed block and the middle part of the rotating rod are movably connected by a connecting rod, and the rotating rod abuts against the step groove to limit the position after rotating a certain angle.
9. The milling fixture for the planetary bracket window of an automobile component according to claim 8, characterized in that: It also includes a sequence valve, which is used to control the action sequence between the plurality of output shafts three.
10. The milling fixture for the planetary bracket window of an automobile component according to claim 8, characterized in that: It also includes a pressure gauge, which is used to measure the pressure of the oil cylinder three.