Vertical composite clamp for besides-star wheel and machining method

Abstract

The invention discloses a vertical composite clamp for a besides-star wheel and a machining method.The vertical composite clamp for the besides-star wheel comprises a driving unit, a clamp body and a positioning assembly connected with the clamp body. The fixture body is matched with the positioning assembly to position a besides-star wheel blank, the positioning reference part on the besides-star wheel is used for machining a first-order end face and a center positioning hole according to the positioning reference, the positioning assembly is withdrawn in the machining process of a second-order outer circle face, and the probe and the center positioning hole are matched to position the besides-star wheel in the axial direction. The common sphere center of the positioning abutting part and the positioning reference part serves as the positioning reference, the overall positioning deviation caused by machining errors of the inner spherical surface and the positioning reference part in the besides-star wheel is eliminated, the overall structural precision of the besides-star wheel is guaranteed, meanwhile, only one clamp mechanism is adopted in the machining process, a clamp does not need to be replaced, and the overall machining efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of brake booster system manufacturing, and in particular to a vertical composite fixture for an outer star wheel and a processing method thereof. Background Art

[0002] After the inner cavity of the outer star wheel is processed, it is necessary to further process the outer surface, such as end face cutting and outer cylindrical surface cutting. At this time, the inner cavity of the outer star wheel needs to be used for fixture positioning.

[0003] The traditional positioning method for processing outer planet wheels is to directly perform internal tension positioning based on the spherical surface on the internal cavity of the outer planet wheel blank. However, due to the processing error of the spherical surface on the internal cavity of the outer planet wheel blank, the central axis of the internal cavity of the outer planet wheel deviates after the fixture is positioned, thereby affecting the accuracy of subsequent processing of the outer planet wheel. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a vertical composite fixture and a processing method for an outer planetary wheel with high processing accuracy and high production efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions.

[0006] The present application provides a vertical composite fixture for an outer planetary wheel, comprising a drive unit, a fixture body, and a positioning assembly connected to the fixture body;

[0007] The fixture body comprises:

[0008] Card head;

[0009] A plurality of claws are elastically slidably arranged in a circular array on the chuck along the central axis of the chuck, and an outer surface away from the driving rod is provided with an outer arc portion that matches the inner spherical shape of the outer star wheel;

[0010] The driving rod is slidably disposed in the chuck and is coaxial with the chuck;

[0011] The positioning component comprises:

[0012] A positioning cylinder is sleeved on the clamping head and is located on the side of the clamping claw close to the ground, and a positioning abutment portion is provided on the end surface close to the clamping claw and can abut against the positioning reference portion on the outer star wheel;

[0013] The driving unit can drive the positioning cylinder to move axially along the chuck, and can also drive the driving rod to move axially along the chuck. When the driving rod moves axially relative to the chuck, it can drive multiple claws to synchronously extend and retract radially along the chuck.

[0014] It is further defined that the above-mentioned vertical composite clamp for the outer planetary wheel is provided with a guiding bevel toward the ground at one end of the clamping claw close to the driving rod, and a driving bevel toward the side away from the ground at one end of the driving rod away from the ground, which can be fitted with the guiding bevel on the clamping claw at the corresponding position.

[0015] It is further defined that, in the above-mentioned vertical composite clamp for the outer planetary wheel, the clamp body further comprises a top buckle fixedly arranged at an end of the clamp head away from the ground.

[0016] It is further defined that the vertical composite fixture for the outer star wheel, wherein the driving unit comprises a positioning cylinder and a clamping cylinder fixedly arranged on the mounting frame, the positioning cylinder is dynamically connected to a positioning telescopic shaft, and the clamping cylinder is dynamically connected to a clamping telescopic shaft;

[0017] Wherein, the positioning cylinder is fixedly connected to the positioning telescopic shaft, and the driving rod is fixedly connected to the clamping telescopic shaft.

[0018] It is further defined that the vertical composite clamp for the outer star wheel is provided with a fixing seat fixed between the end of the clamping cylinder away from the ground and the end of the positioning cylinder close to the ground.

[0019] The clamping telescopic shaft is coaxial with the positioning telescopic shaft and penetrates the positioning telescopic shaft along the axial direction.

[0020] It is further defined that in the vertical composite clamp for the outer star wheel, the positioning cylinder is fixedly connected to one end away from the clamping cylinder and is provided with a mounting cylinder, and a sliding cavity is provided inside the mounting cylinder;

[0021] The positioning assembly also includes a stopper fixedly arranged at one end of the positioning telescopic shaft away from the clamping oil cylinder, the stopper is slidably arranged in the sliding cavity and a sliding pin is fixedly arranged on the end surface of the side away from the clamping oil cylinder;

[0022] Wherein, the sliding pin extends from one end of the limiting member to a side of the mounting tube away from the positioning cylinder and is fixedly connected to the positioning tube.

[0023] It is further defined that the vertical composite fixture for the outer star wheel is provided with a first abutment fixedly disposed on the inner wall of the sliding cavity close to the ground, and a second abutment fixedly disposed on the inner wall of the sliding cavity away from the ground;

[0024] Wherein, when the positioning tube is in a retracted state, the end of the limiting member close to the ground abuts against the first abutment member, and when the positioning tube is in an extended state, the end of the limiting member away from the ground abuts against the second abutment member.

[0025] It is further defined that the above-mentioned vertical composite clamp for the outer planetary wheel, wherein the clamp body also includes a transition shaft fixedly connected to the end of the clamping telescopic shaft away from the ground and slidably connected to the limit member, and the drive rod is fixedly arranged at the end of the transition shaft away from the ground.

[0026] It is further defined that in the vertical composite fixture for the outer planetary wheel, a sleeve is fixedly provided on the transition shaft, and a limiting ring located in the sliding cavity is fixedly provided on the driving rod;

[0027] Wherein, when the clamp body is in a contracted state, the end of the sleeve close to the ground abuts against the limiting member, and when the clamp body is in a tensioned state, the end face of the limiting ring away from the ground abuts against the inner wall of the corresponding side of the sliding cavity.

[0028] The present application also provides a processing method for an outer planet wheel, which is applicable to any of the vertical composite fixtures for an outer planet wheel described above, comprising:

[0029] The clamping claw is adjusted to a retracted state, the inner cavity of the outer star wheel is facing the ground and is sleeved on the clamping head, so that the clamping claw is located inside the inner cavity;

[0030] The positioning cylinder is driven to move toward a side away from the ground until the positioning abutment part abuts against the positioning reference part of the outer star wheel;

[0031] The driving claw is switched to a tensioned state, so that the outer arc portion abuts against the inner spherical surface of the outer star wheel;

[0032] Using the positioning reference part as the positioning reference, perform end face turning of the outer star wheel, and drill a center positioning hole on the end face of the outer star wheel away from the ground;

[0033] The driving probe is inserted into the central positioning hole on the outer star wheel, and the positioning tube is reset to release the abutment between the positioning abutment part and the positioning reference part;

[0034] The outer cylindrical surface of the outer star wheel is turned by taking the spherical center of the positioning abutment and the positioning reference part as the positioning reference.

[0035] The present invention has at least the following beneficial effects:

[0036] During the machining of the outer star wheel blank, the outer star wheel is positioned through the cooperation of the fixture body and the positioning assembly, and the positioning reference part on the outer star wheel is used as the positioning reference to realize the machining of the first-order end face and the center positioning hole. During the machining of the second-order outer cylindrical surface, the positioning assembly is withdrawn, and the axial direction of the outer star wheel is positioned through the cooperation of the probe and the center positioning hole. The common spherical center of the positioning butt part and the positioning reference part is used as the positioning reference to eliminate the overall positioning deviation caused by the machining errors of the inner spherical surface and the positioning reference part of the outer star wheel, thereby ensuring the overall structural accuracy of the outer star wheel. At the same time, only one set of fixture mechanism is used in the machining process of the outer star wheel, and there is no need to replace the fixture, which greatly improves the machining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of a vertical composite fixture for an outer planetary wheel according to an embodiment of the present application;

[0038] Figure 2 This is a structural cross-sectional view of a vertical composite fixture for an outer planetary wheel according to an embodiment of the present application;

[0039] Figure 3 This is a schematic structural diagram of the "clamp body" part of the vertical composite clamp used for the outer planetary wheel in the embodiment of the present application;

[0040] Figure 4 This is a structural cross-sectional view of the "clamp body" part of the vertical composite clamp used for the outer planetary wheel in the embodiment of the present application;

[0041] Figure 5 This is a schematic diagram of the cooperation between the vertical composite fixture for the outer planet wheel and the “external planet wheel 400” in the embodiment of the present application;

[0042] Figure 6 This is a schematic diagram of the arrangement of the "claws 320" in the vertical composite fixture for the outer planetary wheel according to an embodiment of the present application;

[0043] Figure 7 It is a schematic diagram of the arrangement of the "claw 320" in the prior art;

[0044] Figure 8 This is a schematic diagram of the structure of the “external star wheel 400” in the embodiment of the present application;

[0045] Fig. 9 It is a structural cross-sectional view of the “external star wheel 400” in the embodiment of the present application.

[0046] Reference numerals

[0047] Positioning cylinder 110, positioning telescopic shaft 111, clamping cylinder 120, clamping telescopic shaft 121, fixing seat 130, connecting ring 210, mounting cylinder 220, sliding cavity 221, positioning cylinder 230, positioning abutment 231, clamping head 310, clamping claw 320, outer arc portion 321, guiding inclined portion 322, top buckle 330, driving rod 340, driving inclined portion 341, transition shaft 350, limiting member 360, sleeve 370, first abutment 380, second abutment 390, outer star wheel 400, inner cavity 410, inner spherical surface 420, positioning reference portion 430. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0049] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0050] In the following, in conjunction with the accompanying drawings, the vertical composite fixture and processing method for the outer planet wheel provided in the embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0051] Example 1

[0052] like Figures 1 to 9 As shown, an embodiment of the present application provides a vertical composite fixture for an outer planetary wheel, including a drive unit, a fixture body, and a positioning assembly connected to the fixture body.

[0053] The clamp body includes a chuck 310, a plurality of claws 320 arranged in a circular array along the central axis of the chuck 310 and elastically slidingly arranged on the chuck 310, a driving rod 340 slidingly arranged in the chuck 310 and coaxial with the chuck 310, and the positioning assembly includes a positioning cylinder 230 which is sleeved on the chuck 310 and located on the side of the claws 320 close to the ground.

[0054] like Figure 8 , Fig. 9 As shown, an inner cavity 410 is provided at one end of the outer planet wheel 400 along the axial direction, and a plurality of inner spherical surfaces 420 are arranged in an axial ring array on the inner wall of the inner cavity 410, and a positioning reference portion 430 coaxial with the outer planet wheel 400 is provided on the edge of one side of the opening of the inner cavity 410.

[0055] Among them, the driving unit can drive the positioning cylinder 230 to move axially along the chuck 310, and can also drive the driving rod 340 to move axially along the chuck 310. When the driving rod 340 moves axially along the chuck 310 relative to the chuck 310, it can drive multiple claws 320 to synchronously extend and retract radially along the chuck 310. The outer surface of the claw 320 away from the driving rod 340 is provided with an outer arc portion 321 that matches the shape of the inner spherical surface 420 on the outer star wheel 400, and the end face of the positioning cylinder 230 close to the claw 320 is provided with a positioning abutment 231 that can abut the positioning reference portion 430 on the outer star wheel 400.

[0056] It can be understood that the vertical composite fixture in this embodiment is mainly used for processing the outer surface of the outer star wheel 400 and is suitable for a vertical processing lathe. At this time, the outer cylindrical surface and the end surface of the blank of the outer star wheel 400 have not been processed. Most of the existing technical means use secondary clamping for the blank of the outer star wheel 400 according to different processing procedures. The method of using the vertical composite fixture in this embodiment is as follows:

[0057] First, the clamp body faces the side away from the ground, the claw 320 is in a retracted state, the positioning cylinder 230 is in a retracted state and keeps a long distance from the claw 320. At this time, the inner cavity 410 of the outer star wheel 400 faces the ground and is sleeved on the clamp head 310. The claw 320 is located inside the inner cavity 410. When the outer star wheel 400 is placed, the positioning cylinder 230 is driven by the driving unit to move to the side away from the ground until the positioning abutment 231 abuts against the positioning reference part 430 of the outer star wheel 400. When the positioning cylinder 230 is positioned, the driving unit drives the driving rod 3 40 moves to the side away from the ground, so that the multiple claws 320 are synchronously opened along the radial direction of the chuck head 310, and the outer arc portion 321 of the claw 320 abuts against the inner spherical surface 420 of the outer star wheel 400. When the claw 320 is positioned, the outer star wheel 400 will be automatically aligned with the chuck head 310 under the action of the multiple claws 320, and the positioning abutment portion 231 is completely fitted with the positioning reference portion 430. At this time, the positioning reference portion 430 is used as the positioning reference, and the end surface of the outer star wheel 400 away from the ground is turned, and a center positioning hole is drilled on the end surface of the side away from the ground;

[0058] In the second step, the lathe drives the probe coaxial with the center positioning hole on the outer planet wheel 400 toward the ground side until the probe is inserted into the center positioning hole on the outer planet wheel 400, the positioning cylinder 230 is reset, and the positioning abutment 231 and the positioning reference part 430 are released from abutment. Since the probe has positioned the axial direction of the outer planet wheel 400, the center axis of the outer planet wheel 400 coincides with the center axis of the chuck 310, and the outer planet wheel 400 will not rotate relative to the chuck 310 under the joint action of the positioning cylinder 230 and the probe. At this time, the center of the positioning abutment 231 coincides with the center of the positioning reference part 430, and the outer cylindrical surface of the outer planet wheel 400 is turned with the center of the positioning abutment 231 and the positioning reference part 430 as the positioning reference.

[0059] In the embodiment of the present application, the above-mentioned vertical composite fixture for the outer planetary wheel is adopted. During the processing of the outer planetary wheel 400 blank, the outer planetary wheel 400 is positioned by cooperating with the fixture body and the positioning assembly. The positioning reference portion 430 on the outer planetary wheel 400 is used as the positioning reference to realize the processing of the first-order end face and the center positioning hole. During the processing of the second-order outer cylindrical surface, the positioning assembly is withdrawn, and the axial direction of the outer planetary wheel 400 is positioned by cooperating with the probe and the center positioning hole. The common center of the positioning abutment 231 and the positioning reference portion 430 is used as the positioning reference to eliminate the overall positioning deviation caused by the processing errors of the inner spherical surface 420 and the positioning reference portion 430 of the outer planetary wheel 400, thereby ensuring the overall structural accuracy of the outer planetary wheel 400. At the same time, only one set of fixture mechanism is used in the processing of the outer planetary wheel 400, and there is no need to replace the fixture, which greatly improves the processing efficiency.

[0060] In a preferred embodiment, Figure 2 , Figure 3 , Figure 5 As shown, the end of the claw 320 close to the driving rod 340 is provided with a guiding inclined portion 322 facing the ground, and the end of the driving rod 340 away from the ground is provided with a driving inclined portion 341 facing away from the ground and capable of fitting with the guiding inclined portion 322 on the corresponding position of the claw 320.

[0061] It can be understood that when the driving rod 340 moves relative to the chuck 310 to the side away from the ground, the driving bevel 341 abuts against the guiding bevel 322. Under the guiding action of the driving bevel 341 and the guiding bevel 322, the claw 320 will move radially along the chuck 310 to the side away from the central axis of the chuck 310, and at this time, the claw 320 is subjected to a reset elastic force; when the driving rod 340 moves to the side close to the ground to reset, the claw 320 will automatically reset under the action of the elastic force.

[0062] In a preferred embodiment, Figures 1 to 5 As shown, the clamp body also includes a top buckle 330 fixedly disposed at an end of the clamp head 310 away from the ground.

[0063] It can be understood that when the outer star wheel 400 is placed on the clamping head 310 , the top buckle 330 can abut against the bottom wall of the inner cavity 410 , thereby achieving support and positioning of the outer star wheel 400 .

[0064] In a preferred embodiment, Figure 1 , Figure 2 As shown, the driving unit includes a positioning cylinder 110 and a clamping cylinder 120 fixedly mounted on a mounting frame. The positioning cylinder 110 is power-connected with a retractable positioning telescopic shaft 111, and the clamping cylinder 120 is power-connected with a retractable clamping telescopic shaft 121.

[0065] The positioning tube 230 is fixedly connected to the positioning telescopic shaft 111 , and the driving rod 340 is fixedly connected to the clamping telescopic shaft 121 .

[0066] In a preferred embodiment, Figure 1 , Figure 2 As shown, the clamping cylinder 120 is located on the side of the positioning cylinder 110 close to the ground, and a fixing seat 130 is fixed between the end of the clamping cylinder 120 away from the ground and the end of the positioning cylinder 110 close to the ground.

[0067] The clamping telescopic shaft 121 is coaxial with the positioning telescopic shaft 111 and penetrates the positioning telescopic shaft 111 along the axial direction.

[0068] In a preferred embodiment, Figures 1 to 4 As shown, a mounting cylinder 220 is fixedly connected to one end of the positioning cylinder 110 away from the clamping cylinder 120 , and a sliding cavity 221 is provided inside the mounting cylinder 220 .

[0069] The positioning assembly also includes a limit member 360 fixedly arranged at one end of the positioning telescopic shaft 111 away from the clamping cylinder 120. The limit member 360 is slidably arranged in the sliding cavity 221 and a sliding pin is fixedly arranged on the end surface of the side away from the clamping cylinder 120. The sliding pin extends from one end of the limit member 360 to the side of the mounting tube 220 away from the positioning cylinder 110 and is fixedly connected to the positioning tube 230.

[0070] In a preferred embodiment, Figure 2 , Figure 4 As shown, a first abutment 380 is fixedly disposed on the inner wall of the sliding cavity 221 close to the ground, and a second abutment 390 is fixedly disposed on the inner wall of the sliding cavity 221 away from the ground.

[0071] When the positioning tube 230 is retracted, the end of the limiting member 360 close to the ground abuts against the first abutment member 380 ; when the positioning tube 230 is extended, the end of the limiting member 360 away from the ground abuts against the second abutment member 390 .

[0072] It is understandable that the first abutment 380 and the second abutment 390 can limit the movement stroke of the positioning tube 230, thereby ensuring the stability of the state switching of the positioning component.

[0073] It can be understood that the limiting structure of the moving stroke of the positioning cylinder 230 is not limited to the above-mentioned one. For example, the limiting member 360 can be set to directly abut against the inner wall of the corresponding side of the sliding cavity 221 when the positioning cylinder 230 is in the retracted state or the extended state, or the telescopic stroke of the positioning cylinder 110 can be directly limited from the control system level. As long as the stability of the state switching of the positioning component can be guaranteed, it will not be elaborated here.

[0074] In a preferred embodiment, Figures 1 to 4 As shown, the positioning assembly also includes a connection ring 210 fixedly arranged at one end of the positioning cylinder 110 away from the clamping cylinder 120 , and the mounting tube 220 is fixedly arranged on the end surface of the connection ring 210 away from the positioning cylinder 110 .

[0075] In a preferred embodiment, Figure 2 , Figure 4 As shown, the clamp body also includes a transition shaft 350 fixedly connected to the end of the clamping telescopic shaft 121 away from the ground and slidably connected to the limiter 360, and the driving rod 340 is fixedly arranged at the end of the transition shaft 350 away from the ground.

[0076] In a preferred embodiment, Figure 2 , Figure 4 As shown, a sleeve 370 is fixedly provided on the transition shaft 350 , and a limiting ring located in the sliding cavity 221 is fixedly provided on the driving rod 340 .

[0077] When the clamp body is in a contracted state, the end of the sleeve 370 close to the ground abuts against the limiter 360 ; when the clamp body is in a tensioned state, the end surface of the limit ring away from the ground abuts against the inner wall of the corresponding side of the sliding cavity 221 .

[0078] It is understandable that the limit ring and the sleeve 370 provided on the driving rod 340 can limit the moving stroke of the driving rod 340, thereby ensuring the stability of the state switching of the clamp body.

[0079] It is understandable that the limiting structure of the moving stroke of the driving rod 340 is not limited to the above-mentioned one. For example, it can be directly set so that the end of the sleeve 370 away from the ground abuts against the inner wall of the corresponding side of the sliding cavity 221 when the clamp body is in a tensioned state, or the telescopic stroke of the clamping cylinder 120 can be directly limited from the control system level. As long as the stability of the clamp body state switching can be guaranteed, it will not be elaborated here.

[0080] Example 2

[0081] like Figures 1 to 9 As shown, an embodiment of the present application provides a vertical composite clamp for an outer planetary wheel, including a clamp body and a positioning assembly connected to the clamp body.

[0082] The clamp body includes a chuck 310, a plurality of claws 320 arranged in a circular array along the central axis of the chuck 310 and elastically slidingly arranged on the chuck 310, and a driving rod 340 arranged in the chuck 310 and coaxial with the chuck 310, the driving rod 340 is connected to the driving unit and can move axially along the chuck 310, and the positioning assembly includes a positioning cylinder 230 coaxial with the chuck 310 and located on the side of the claws 320 close to the ground.

[0083] like Figure 8 , Fig. 9 As shown, an inner cavity 410 is provided at one end of the outer planet wheel 400 along the axial direction, and a plurality of inner spherical surfaces 420 are arranged in an axial ring array on the inner wall of the inner cavity 410, and a positioning reference portion 430 coaxial with the outer planet wheel 400 is provided on the edge of one side of the opening of the inner cavity 410.

[0084] Among them, when the driving rod 340 moves axially relative to the chuck 310 along the chuck 310, it can drive multiple claws 320 to synchronously extend and retract radially along the chuck 310. The outer surface of the claw 320 away from the driving rod 340 is provided with an outer arc portion 321 that matches the shape of the inner spherical surface 420 on the outer star wheel 400, and the end surface of the positioning cylinder 230 close to the claw 320 is provided with a positioning abutment 231 that can abut against the positioning reference portion 430 on the outer star wheel 400.

[0085] When the clamp body is clamped, the positioning abutment 231 abuts the positioning reference portion 430, the claw 320 abuts the inner spherical surface 420, the center of the outer arc portion 321 and the center of the inner spherical surface 420 are located on the central axis of the clamp head 310, and the distance between the center of the outer arc portion 321 and the plane where the positioning abutment 231 is located is smaller than the distance between the center of the inner spherical surface 420 and the plane where the positioning abutment 231 is located.

[0086] Initially, the clamp body is facing the side away from the ground, and the claws 320 are in a retracted state; when clamping, the inner cavity 410 of the outer planet wheel 400 is facing the ground and is sleeved on the clamping head 310, and the claws 320 are located inside the inner cavity 410. When the outer planet wheel 400 is placed, the driving unit drives the driving rod 340 to move to the side away from the ground, so that multiple claws 320 are synchronously opened along the radial direction of the clamping head 310, and the outer arc portion 321 of the claws 320 abuts against the inner spherical surface 420 of the outer planet wheel 400. In this process, the outer planet wheel 400 will be automatically aligned with the clamping head 310 under the action of multiple claws 320, and at the same time, the positioning reference portion 430 is completely in contact with the positioning abutment 231.

[0087] In the embodiment of the present application, the above-mentioned vertical composite clamp for the outer star wheel is used, the positioning butt portion 231 is matched with the shape of the inner spherical surface 420, and the center of the positioning butt portion 231 is located on the side of the center of the inner spherical surface 420 close to the ground in the clamped state, so that when the positioning butt portion 231 squeezes the inner spherical surface 420, it generates a component force toward the ground side, so that the positioning reference portion 430 can be completely close to the positioning butt portion 231, ensuring the axial positioning accuracy of the positioning reference portion 430 and the positioning butt portion 231, so as to improve the subsequent processing accuracy and stability of the outer star wheel 400.

[0088] In a preferred embodiment, the number of the claws 320 on the chuck head 310 is set to an odd number.

[0089] It is understandable that if Figure 7 As shown, the inner spherical surface 420 on the outer planet wheel 400 is generally an even number (usually 6 / 8), so the number of clamp jaws in the prior art is generally set to an even number (6 / 8) (corresponding to the number of product lanes). Since the inner spherical surface 420 of the outer planet wheel 400 is a rough surface, the size will fluctuate to a certain extent, and the circle appears as an ellipse, resulting in two jaws on the same plane of the clamp first contacting the two highest points of the inner spherical surface 420 of the outer planet wheel 400 until the jaws are fully expanded. At this time, only two jaws are in contact with the outer planet wheel 400, and the remaining jaws are in empty contact, resulting in unstable centering accuracy. After processing, the outer circle size of the outer planet wheel 400 appears as an ellipse (at least 3 jaws are in contact for stable centering).

[0090] In the embodiment of the present application, the above-mentioned vertical composite clamp for the outer planet wheel is adopted, and the number of claws 320 is set to an odd number. When the size of the inner spherical surface 420 of the outer planet wheel 400 is unstable, the clamping forces of the two claws 320 that come into contact first will not be in the same straight line. The outer planet wheel 400 will move under the component force of the two claws 320 that come into contact first until it comes into contact with the other claws 320, thereby ensuring the positioning reliability of the outer planet wheel 400.

[0091] In a preferred embodiment, Figure 6 As shown, the number of the claws 320 on the clamping head 310 is specifically set to five.

[0092] In a preferred embodiment, Figure 2 , Figure 3 , Figure 5 As shown, the end of the claw 320 close to the driving rod 340 is provided with a guiding inclined portion 322 facing the ground, and the end of the driving rod 340 away from the ground is provided with a driving inclined portion 341 facing away from the ground and capable of fitting with the guiding inclined portion 322 on the corresponding position of the claw 320.

[0093] It can be understood that when the driving rod 340 moves relative to the chuck 310 to the side away from the ground, the driving bevel 341 abuts against the guiding bevel 322. Under the guiding action of the driving bevel 341 and the guiding bevel 322, the claw 320 will move radially along the chuck 310 to the side away from the central axis of the chuck 310, and at this time, the claw 320 is subjected to a reset elastic force; when the driving rod 340 moves to the side close to the ground to reset, the claw 320 will automatically reset under the action of the elastic force.

[0094] In a preferred embodiment, Figures 1 to 5 As shown, the clamp body also includes a top buckle 330 fixedly disposed at an end of the clamp head 310 away from the ground.

[0095] It can be understood that when the outer star wheel 400 is placed on the clamping head 310 , the top buckle 330 can abut against the bottom wall of the inner cavity 410 , thereby achieving support and positioning of the outer star wheel 400 .

[0096] In a preferred embodiment, Figure 1 , Figure 2 As shown, the driving unit includes a clamping cylinder 120 fixedly arranged on a mounting frame. The clamping cylinder 120 is power-connected with a retractable clamping retractable shaft 121 , and the driving rod 340 is fixedly connected to the clamping retractable shaft 121 .

[0097] In a preferred embodiment, Figure 2 , Figure 4 As shown, the clamp body further includes a transition shaft 350 fixedly connected to the end of the clamping telescopic shaft 121 away from the ground, and the driving rod 340 is fixedly arranged at the end of the transition shaft 350 away from the ground.

[0098] In a preferred embodiment, Figure 2 , Figure 4 As shown, a sleeve 370 is fixedly provided on the transition shaft 350 , and a limiting ring located in the sliding cavity 221 is fixedly provided on the driving rod 340 .

[0099] When the clamp body is in a contracted state, the end of the sleeve 370 close to the ground abuts against the inner wall of the corresponding side of the sliding cavity 221; when the clamp body is in a tensioned state, the end face of the limit ring away from the ground abuts against the inner wall of the corresponding side of the sliding cavity 221.

[0100] It is understandable that the limit ring and the sleeve 370 provided on the driving rod 340 can limit the moving stroke of the driving rod 340, thereby ensuring the stability of the state switching of the clamp body.

[0101] It is understandable that the limiting structure of the moving stroke of the driving rod 340 is not limited to the above-mentioned one. For example, it can be directly set so that the end of the sleeve 370 away from the ground abuts against the inner wall of the corresponding side of the sliding cavity 221 when the clamp body is in a tensioned state, or the telescopic stroke of the clamping cylinder 120 can be directly limited from the control system level. As long as the stability of the clamp body state switching can be guaranteed, it will not be elaborated here.

[0102] Example 3

[0103] The embodiment of the present application provides a processing method for an outer planet wheel, which is applicable to the vertical composite fixture for the outer planet wheel in the above-mentioned embodiment 1, comprising:

[0104] Step S1, the claw 320 is adjusted to a retracted state, the inner cavity 410 of the outer star wheel 400 is directed toward the ground and sleeved on the clamping head 310, and the claw 320 is located inside the inner cavity 410;

[0105] Step S2, driving the positioning cylinder 230 to move away from the ground until the positioning abutment portion 231 abuts against the positioning reference portion 430 of the outer star wheel 400;

[0106] Step S3, the driving claw 320 is switched to a tensioned state, so that the outer arc portion 321 abuts against the inner spherical surface 420 of the outer planetary wheel 400;

[0107] Step S4, using the positioning reference portion 430 as a positioning reference, performing end surface turning of the outer planet wheel 400, and drilling a center positioning hole on the end surface of the outer planet wheel 400 away from the ground;

[0108] Step S5, the driving probe is inserted into the central positioning hole on the outer star wheel 400, and the positioning cylinder 230 is reset to release the abutment between the positioning abutment portion 231 and the positioning reference portion 430;

[0109] Step S6, using the spherical center of the positioning abutment portion 231 and the positioning reference portion 430 as the positioning reference, performing turning of the outer cylindrical surface of the outer planet wheel 400.

[0110] In the embodiment of the present application, the above-mentioned processing method for the outer planet wheel is adopted. During the processing of the outer planet wheel 400, the positioning of the outer planet wheel 400 is achieved through the cooperation of the positioning cylinder 230 and the clamping claw 320, and different positioning references are respectively used in the end face and outer cylindrical surface processing steps of the outer planet wheel 400, which not only reduces the cost investment of equipment and fixtures, but also greatly reduces the total processing cycle, thereby improving the overall production efficiency of the outer planet wheel 400.

[0111] It is understandable that the order of step S2 and step S1 can be swapped, that is, the positioning cylinder 230 can be moved to the predetermined position before the outer star wheel 400 is placed on the chuck 310 , which will not affect the placement of the outer star wheel 400 and the positioning of the positioning cylinder 230 .

[0112] In a preferred embodiment, step S6 further includes:

[0113] Step S7: After the processing of the outer planet wheel 400 is completed, the probe and the clamping claw 320 are reset, and the outer planet wheel 400 is removed from the clamping head 310 to perform the next processing cycle.

[0114] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0115] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A vertical composite fixture for an outer planetary wheel, characterized in that: It includes a driving unit, a fixture body and a positioning component connected to the fixture body; The fixture body comprises: Card head; A plurality of claws are elastically slidably arranged in a circular array on the chuck along the central axis of the chuck, and an outer surface away from the driving rod is provided with an outer arc portion that matches the inner spherical shape of the outer star wheel; The driving rod is slidably disposed in the chuck and is coaxial with the chuck; The positioning component comprises: A positioning cylinder is sleeved on the clamping head and is located on the side of the clamping claw close to the ground, and a positioning abutment portion is provided on the end surface close to the clamping claw and can abut against the positioning reference portion on the outer star wheel; The driving unit can drive the positioning cylinder to move axially along the chuck, and can also drive the driving rod to move axially along the chuck. When the driving rod moves axially relative to the chuck, it can drive multiple claws to synchronously extend and retract radially along the chuck.

2. The vertical composite fixture for the outer planetary wheel according to claim 1, characterized in that: The end of the clamping claw close to the driving rod is provided with a guiding inclined portion facing the ground, and the end of the driving rod away from the ground is provided with a driving inclined portion facing the side away from the ground and capable of fitting with the guiding inclined portion on the clamping claw at the corresponding position.

3. The vertical composite fixture for the outer planetary wheel according to claim 1, characterized in that: The clamp body also includes a top buckle fixedly arranged at an end of the clamp head away from the ground.

4. The vertical composite fixture for an outer planetary wheel according to claim 1, characterized in that: The driving unit comprises a positioning oil cylinder and a clamping oil cylinder fixedly arranged on the mounting frame, the positioning oil cylinder is dynamically connected with a positioning telescopic shaft, and the clamping oil cylinder is dynamically connected with a clamping telescopic shaft; Wherein, the positioning cylinder is fixedly connected to the positioning telescopic shaft, and the driving rod is fixedly connected to the clamping telescopic shaft.

5. The vertical composite fixture for the outer planetary wheel according to claim 4, characterized in that: The clamping cylinder is located on the side of the positioning cylinder close to the ground, and a fixing seat is fixed between the end of the clamping cylinder away from the ground and the end of the positioning cylinder close to the ground; The clamping telescopic shaft is coaxial with the positioning telescopic shaft and penetrates the positioning telescopic shaft along the axial direction.

6. The vertical composite fixture for the outer planetary wheel according to claim 5, characterized in that: The positioning cylinder is fixedly connected to one end away from the clamping cylinder with a mounting cylinder, and a sliding cavity is provided inside the mounting cylinder; The positioning assembly also includes a stopper fixedly arranged at one end of the positioning telescopic shaft away from the clamping oil cylinder, the stopper is slidably arranged in the sliding cavity and a sliding pin is fixedly arranged on the end surface of the side away from the clamping oil cylinder; Wherein, the sliding pin extends from one end of the limiting member to a side of the mounting tube away from the positioning cylinder and is fixedly connected to the positioning tube.

7. The vertical composite fixture for the outer planetary wheel according to claim 6, characterized in that: A first abutment is fixedly disposed on the inner wall of the sliding cavity on the side close to the ground, and a second abutment is fixedly disposed on the inner wall on the side away from the ground; Wherein, when the positioning tube is in a retracted state, the end of the limiting member close to the ground abuts against the first abutment member, and when the positioning tube is in an extended state, the end of the limiting member away from the ground abuts against the second abutment member.

8. The vertical composite fixture for an outer planetary wheel according to any one of claims 1 to 7, characterized in that: The clamp body also includes a transition shaft fixedly connected to the end of the clamping telescopic shaft away from the ground and slidably connected to the limiter, and the driving rod is fixedly arranged at the end of the transition shaft away from the ground.

9. The vertical composite fixture for the outer planetary wheel according to claim 8, characterized in that: A sleeve is fixedly provided on the transition shaft, and a limiting ring located in the sliding cavity is fixedly provided on the driving rod; Wherein, when the clamp body is in a contracted state, the end of the sleeve close to the ground abuts against the limiting member, and when the clamp body is in a tensioned state, the end face of the limiting ring away from the ground abuts against the inner wall of the corresponding side of the sliding cavity.

10. A processing method for an outer planet wheel, characterized in that: A vertical composite fixture for an outer planetary wheel according to any one of claims 1 to 9, comprising: The clamping claw is adjusted to a retracted state, the inner cavity of the outer star wheel is facing the ground and is sleeved on the clamping head, so that the clamping claw is located inside the inner cavity; The positioning cylinder is driven to move toward a side away from the ground until the positioning abutment part abuts against the positioning reference part of the outer star wheel; The driving claw is switched to a tensioned state, so that the outer arc portion abuts against the inner spherical surface of the outer star wheel; Using the positioning reference part as the positioning reference, perform end face turning of the outer star wheel, and drill a center positioning hole on the end face of the outer star wheel away from the ground; The driving probe is inserted into the central positioning hole on the outer star wheel, and the positioning tube is reset to release the abutment between the positioning abutment part and the positioning reference part; The outer cylindrical surface of the outer star wheel is turned by taking the spherical center of the positioning abutment and the positioning reference part as the positioning reference.

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