A gearbox front housing machining fixture

Abstract

This utility model discloses a gearbox front housing machining fixture, relating to the field of machining equipment technology. The gearbox front housing machining fixture includes a frame, a machining base, multiple sets of fixing mechanisms, and hydraulic pipelines. Two uprights are spaced apart on the frame, and a turntable is rotatably mounted on each upright. The machining base is used to hold the front housing. The fixing mechanisms include hydraulic actuators connected to fixing components. The hydraulic pipelines include a first pipeline and a second pipeline connected in series. The first pipeline is formed inside the turntable, and the second pipeline is formed inside the machining base and connected to each hydraulic actuator. The uprights also have pipeline inlets and outlets connected to the first pipeline. By placing the hydraulic pipelines inside the turntable and machining base, hydraulic oil is supplied and output to the hydraulic actuators, providing power, reducing the complexity of external pipelines, and solving the problem of mutual interference in the hydraulic pipelines of existing machining fixtures, which affects machining.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, and in particular to a machining fixture for the front housing of a gearbox. Background Technology

[0002] In the field of machining, the gearbox front housing is a key component in the transmission systems of automobiles and other mechanical systems, and its machining accuracy and efficiency have a crucial impact on the performance of the entire transmission system. Traditional gearbox front housing machining fixtures mostly use hydraulic drive to achieve fixed connection. Hydraulic drive fixtures use the pressure of hydraulic oil to provide clamping force, and the clamping and releasing of the housing is achieved by the extension and retraction of hydraulic cylinders.

[0003] For example, patent CN205201122U discloses a positioning fixture for machining a gearbox housing. It uses two first hydraulic cylinders to fix both ends of the upper housing, and then uses a first hydraulic cylinder at the smaller diameter end of the lower housing to fix the smaller diameter end, ensuring a good positioning effect. The use of hydraulic cylinders ensures uniform and stable clamping force, which helps guarantee machining accuracy. However, the hydraulic lines of the hydraulic cylinders are usually located outside the fixture. The numerous hydraulic lines increase the difficulty of installation and adjustment, and can easily lead to interference between the hydraulic lines. During machining, the hydraulic lines may collide with other parts of the machine tool or the machining tools, affecting the normal progress of machining and potentially causing safety accidents. Utility Model Content

[0004] In view of this, this utility model proposes a gearbox front housing machining fixture, which can solve the problem that the hydraulic lines of existing machining fixtures are prone to mutual interference, affecting the machining process.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a machining fixture for the front housing of a gearbox, comprising:

[0007] A frame, on which two uprights are spaced apart, and a turntable is rotatably mounted on each upright;

[0008] A processing base, with its two ends connected to the two turntables respectively, is used to place the front housing;

[0009] Multiple sets of fixing mechanisms are spaced apart on the machining base. Each fixing mechanism includes a hydraulic actuator mounted on the machining base, and a fixing member connected to the hydraulic actuator for fixing the front housing.

[0010] The hydraulic pipeline includes a first pipeline and a second pipeline that are connected to each other. The first pipeline is formed inside the turntable, and the second pipeline is formed inside the processing base and is connected to each of the hydraulic actuators. The stand is also provided with a pipeline inlet and a pipeline outlet that are connected to the first pipeline.

[0011] Based on the above technical solutions, preferably, the processing base includes a base, the fixing mechanism is disposed on the base, and each end of the base is provided with a stand, the two stands are respectively connected to the two turntables; the second pipeline includes a first branch formed on the stand and a second branch formed on the base, the first branch and the second branch are connected.

[0012] More preferably, the turntable and the stand are detachably connected by multiple sets of connecting mechanisms. The connecting mechanism includes a first positioning groove, a second positioning groove, a positioning member, and a locking member. The first positioning groove is formed on the turntable, and the second positioning groove is formed on the stand and corresponds to the first positioning groove. The first end of the positioning member is inserted into the first positioning groove along the radial direction of the turntable, and the second end of the positioning member is inserted into the second positioning groove. The locking member passes through the stand along the axial direction of the turntable for detachable connection with the positioning member.

[0013] More preferably, the stand has a positioning hole extending through the turntable along the axial direction, the positioning hole communicating with the second positioning groove, and the locking member cooperating with the positioning member through the positioning hole.

[0014] Based on the above technical solution, preferably, it further includes two sets of rotating mechanisms, which are respectively connected to the two uprights. Each rotating mechanism includes:

[0015] An outer casing, mounted on the support frame, has a cavity formed within it. The pipe inlet and outlet are both located on the outer casing and communicate with the cavity.

[0016] A rotating shaft is located inside the cavity and rotates with the outer shell. A conveying channel communicating with the cavity is formed inside the rotating shaft. The rotating shaft passes through the upright and is connected to the turntable. The conveying channel is connected to the first pipeline.

[0017] More preferably, a connecting hole is provided through the center of the turntable, a sealing element is embedded in the connecting hole, the first pipeline is formed in the sealing element, one end of the first pipeline is connected to the conveying channel, and the other end of the first pipeline is connected to the first branch.

[0018] Based on the above technical solutions, preferably, the base is provided with a plurality of limiting posts at intervals, and each limiting post encloses a limiting interval, and the front box is disposed within the limiting interval.

[0019] Based on the above technical solutions, preferably, at least two positioning posts are provided at intervals on the base, and at least two positioning holes are provided on the front box, with the two positioning posts correspondingly inserted into the two positioning holes.

[0020] More preferably, the top of the positioning post has a guide structure, and the periphery of the positioning post includes two positioning side surfaces arranged opposite each other. The two positioning side surfaces are connected by two clearance side surfaces. The positioning side surfaces fit against the inner wall surface of the corresponding positioning hole, and a clearance gap is formed between the clearance side surfaces and the inner wall surface of the corresponding positioning hole.

[0021] Based on the above technical solutions, preferably, the part of the fastener used to cooperate with the front housing is a fixing part, and the fixing part is provided with a flexible component.

[0022] The gearbox front housing machining fixture of this utility model has the following advantages over the prior art:

[0023] (1) The front housing is fixed on the machining base by moving the fixed part through the hydraulic drive. The rotation of the turntable drives the synchronous rotation of the machining base. The posture of the front housing is adjusted during the machining process, which improves the flexibility and adaptability of the machining. The pipeline inlet and pipeline outlet are used to connect to the external hydraulic system to provide power to the hydraulic drive. By setting the hydraulic pipeline inside the fixture, hydraulic oil is delivered and output to the hydraulic drive, which reduces the complexity of the external pipeline, improves the integrity and aesthetics of the fixture, and facilitates maintenance and repair. It also solves the problem that the hydraulic pipelines of the existing machining fixture are prone to mutual interference, which affects the machining.

[0024] (2) The guide structure facilitates the insertion of the positioning pins into the positioning holes, improving the accuracy and convenience of positioning. The fit between the positioning side and the inner wall of the positioning hole enables precise positioning, while the clearance between the clearance side and the inner wall of the positioning hole provides for assembly error, ensuring that each positioning pin can be stably inserted into the corresponding positioning hole and avoiding interference between the positioning pin and the positioning hole. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the gearbox front housing machining fixture of this utility model;

[0027] Figure 2 This is a perspective view of the gearbox front housing machining fixture of this utility model;

[0028] Figure 3 An exploded view of the gearbox front housing machining fixture of this utility model, used to illustrate the connecting mechanism;

[0029] Figure 4 An exploded view of the gearbox front housing machining fixture of this utility model, used to illustrate the connection holes;

[0030] Figure 5 This is a perspective view of the central support of the gearbox front housing machining fixture of this utility model;

[0031] Figure 6 This is a side view of the central support of the gearbox front housing machining fixture of this utility model;

[0032] Figure 7 for Figure 6 A cross-sectional view along the AA direction;

[0033] Figure 8 This is a perspective view of the rotating shaft in the gearbox front housing machining fixture of this utility model;

[0034] Figure 9 This is a perspective view of the machining seat in the gearbox front housing machining fixture of this utility model;

[0035] Figure 10 This is a side view of the base in the gearbox front housing machining fixture of this utility model;

[0036] Figure 11 for Figure 10 Cross-sectional view along the BB direction;

[0037] Figure 12 This is a perspective view of the positioning pin in the gearbox front housing machining fixture of this utility model;

[0038] Figure 13 This is a schematic diagram of the structure of the gearbox front housing machining fixture of this utility model, in which the positioning pin is inserted into the positioning hole.

[0039] Figure label:

[0040] 1. Frame; 2. Stand; 3. Turntable; 31. Connecting hole; 4. Machining base; 41. Base; 42. Stand; 5. Front housing; 51. Positioning hole; 6. Fixing mechanism; 61. Hydraulic actuator; 62. Fixing component; 63. Flexible component; 7. Hydraulic pipeline; 71. First pipeline; 72. Second pipeline; 721. First branch; 722. Second branch; 73. Pipeline inlet; 74. Pipeline outlet; 8. Connecting mechanism ; 81. First positioning groove; 82. Second positioning groove; 83. Positioning component; 84. Positioning hole; 9. Rotating mechanism; 91. Outer shell; 911. Cavity; 92. Rotating shaft; 921. Conveying channel; 93. Retaining ring; 94. Enclosure space; 10. Sealing component; 11. Limiting post; 12. Limiting interval; 13. Positioning post; 131. Guide structure; 132. Positioning side; 133. Avoidance side; 14. Avoidance gap. Detailed Implementation

[0041] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0042] like Figures 1 to 13 As shown, this utility model provides a machining fixture for a gearbox front housing 5, including a frame 1, a machining base 4, multiple sets of fixing mechanisms 6, and hydraulic lines 7. Two uprights 2 are spaced apart on the frame 1, and a turntable 3 is rotatably mounted on the uprights 2. The machining base 4 is connected to the two turntables 3 at both ends and is used to place the front housing 5. Multiple sets of fixing mechanisms 6 are spaced apart on the machining base 4. Each fixing mechanism 6 includes a hydraulic actuator 61 mounted on the machining base 4, and a fixing member 62 is connected to the hydraulic actuator 61 for fixing the front housing 5. The hydraulic lines 7 include a first line 71 and a second line 72 that are connected to each other. The first line 71 is formed inside the turntable 3, and the second line 72 is formed inside the machining base 4 and is connected to each hydraulic actuator 61. The uprights 2 are also provided with a line inlet 73 and a line outlet 74 that are connected to the first line 71.

[0043] The front housing 5 is placed on the machining base 4. The hydraulic actuator 61 drives the movement of the fixing member 62, which acts on the front housing 5, thereby fixing the front housing 5 on the machining base 4. The rotation of the turntable 3 drives the synchronous rotation of the machining base 4. During the machining process, the posture of the front housing 5 can be adjusted, improving the flexibility and adaptability of the machining process. The pipe inlet 73 and pipe outlet 74 set on the stand 2 are used to connect to the external hydraulic system to provide power to the hydraulic actuator 61. By setting the hydraulic pipe 7 inside the fixture, hydraulic oil is delivered and output to the hydraulic actuator 61, reducing the complexity of the external pipeline, improving the overall integrity and aesthetics of the fixture, and also facilitating maintenance and repair. This solves the problem of mutual interference of the hydraulic pipes 7 in existing machining fixtures, which affects the machining process.

[0044] In some embodiments, the portion of the fastener 62 that mates with the front housing 5 is a fixing part, and a flexible element 63 is provided on the fixing part. The flexible element 63 can be made of materials such as sponge, rubber, or silicone. The flexible element 63 can improve the contact stability between the fastener 62 and the front housing 5, reducing the loosening of the front housing 5 caused by vibration or impact during processing. At the same time, the flexible element 63 can also play a certain buffering role, protecting the surface of the front housing 5 from damage and improving the processing quality and service life of the front housing 5.

[0045] The fixing member 62 is moved by the hydraulic actuator 61, thereby acting on the front housing 5 to fix the front housing 5. The fixing member 62 can be moved or rotated on the machining base 4. When the fixing member 62 is moved on the machining base 4, the hydraulic actuator 61 drives the fixing member 62 to move towards or away from the periphery of the front housing 5. When the fixing member 62 is rotated on the machining base 4, the hydraulic actuator 61 drives the fixing member 62 to reciprocate, thereby clamping the front housing 5.

[0046] In this embodiment, the hydraulic actuator 61 is used to drive the fixing member 62 to swing. The output end of the hydraulic actuator 61 extends and retracts along the height direction of the processing base 4. The fixing member 62 is rotatably mounted on the processing base 4. One end of the fixing member 62 is connected to the output end of the hydraulic actuator 61, and the other end of the fixing frame is used to fix the front housing 5.

[0047] In some embodiments, the processing base 4 includes a base 41, the fixing mechanism 6 is disposed on the base 41, and each end of the base 41 is provided with a stand 42, the two stands 42 being respectively connected to the two turntables 3; the second pipeline 72 includes a first branch 721 formed on the stand 42 and a second branch 722 formed on the base 41, the first branch 721 and the second branch 722 being connected. The segmented pipeline structure makes the layout of the hydraulic pipeline 7 inside the processing base 4 more flexible, facilitating reasonable arrangement according to the structure of the processing base 4, and also facilitating installation and maintenance.

[0048] like Figures 1 to 13 As shown, in some embodiments, the turntable 3 and the stand 42 are detachably connected by multiple sets of connecting mechanisms 8. Each connecting mechanism 8 includes a first positioning groove 81, a second positioning groove 82, a positioning element 83, and a locking element. The first positioning groove 81 is formed on the turntable 3, and the second positioning groove 82 is formed on the stand 42 and corresponds to the first positioning groove 81. The first end of the positioning element 83 is inserted radially into the first positioning groove 81 along the turntable 3, and the second end of the positioning element 83 is inserted into the second positioning groove 82. The locking element passes through the stand 42 axially along the turntable 3 for detachable connection with the positioning element 83. This achieves a detachable connection between the turntable 3 and the stand 42, ensuring the stability of the connection while facilitating disassembly for replacement or maintenance when needed, thus improving the maintenance convenience and service life of the fixture.

[0049] In this configuration, the first end of the positioning member 83 is inserted into the turntable 3 radially, ensuring a stable connection between the positioning member 83 and the turntable 3 axially. The second end of the positioning member 83 is inserted into the second positioning groove 82 axially. The stand 42 can move axially along the turntable 3 until it covers the turntable 3, at which point the second end of the positioning member 83 is inserted into the second positioning groove 82, thus initially positioning and connecting the stand 42. A locking member then passes through the stand 42 and connects to the positioning member 83, thereby connecting the stand 42 to the turntable 3. This improves the structural strength of the stand 42 on the turntable 3 and ensures the reliability and stability of the stand 42 connection.

[0050] The cross-sectional shape of the positioning element 83 can be L-shaped or T-shaped. In this embodiment, the cross-sectional shape of the positioning element 83 is T-shaped, and correspondingly, the cross-sectional shape of the first positioning groove 81 is also T-shaped.

[0051] In some embodiments, the support 42 has a positioning hole 84 extending through the turntable 3 along its axial direction. The positioning hole 84 communicates with the second positioning groove 82, and the locking member engages with the positioning member 83 through the positioning hole 84. This allows the locking member to accurately engage with the positioning member 83, achieving a secure connection between the turntable 3 and the support 42. Simultaneously, the positioning hole 84 facilitates the installation and removal of the locking member, further improving the maintainability of the fixture. The locking member includes bolts or screws, etc. In this embodiment, a bolt is used. The locking member can penetrate the positioning hole 84. The inner wall of the positioning hole 84 can also have internal threads for screwing into the bolt. The positioning member 83 has a threaded hole corresponding to the positioning hole 84, which is threaded to connect with the locking member. Thus, the locking member sequentially engages with the positioning hole 84 and the threaded hole, thereby securely connecting the support 42 and the turntable 3 together. This ensures that the rotation of the turntable 3 drives the stable rotation of the support 42, thereby guaranteeing the reliability of the front housing 5 processing.

[0052] like Figures 1 to 13 As shown, in some embodiments, the gearbox front housing 5 machining fixture further includes two sets of rotating mechanisms 9. The two sets of rotating mechanisms 9 are respectively connected to the two uprights 2. Each rotating mechanism 9 includes a housing 91 and a rotating shaft 92. The housing 91 is disposed on the upright 2, and a cavity 911 is formed inside the housing 91. The pipe inlet 73 and the pipe outlet 74 are both opened on the housing 91 and communicate with the cavity 911. The rotating shaft 92 is located inside the cavity 911 and rotatably engages with the housing 91. A conveying channel 921 communicating with the cavity 911 is formed inside the rotating shaft 92. The rotating shaft 92 passes through the upright 2 and is connected to the turntable 3. The conveying channel 921 communicates with the first pipe 71. Hydraulic oil can enter the conveying channel 921 through the pipe inlet 73 on the housing 91, and then be conveyed to the hydraulic actuator 61 in the machining base 4 through the first pipe 71, providing stable power to the hydraulic actuator 61. It is understood that the rotating mechanism 9 includes a rotating driver, which can be a motor or similar device. The rotating driver is connected to the rotating shaft 92 to drive the rotation of the rotating shaft 92. Driving the rotation of the turntable 3 via the rotating shaft 92 improves the reliability of the rotation. Furthermore, by rotatably positioning the rotating shaft 92 within the housing 91, it is ensured that the rotation of the rotating shaft 92 does not cause the housing 91 to rotate synchronously. This, in turn, ensures the proper positioning of the pipe inlet 73 and pipe outlet 74 on the housing 91, preventing the rotation of the rotating shaft 92 from driving the movement of the pipe inlet 73 and pipe outlet 74. This further enhances the stability of the hydraulic pipeline 7 in supplying hydraulic oil and also prevents interference between other components in the fixture and the hydraulic pipeline 7.

[0053] In some embodiments, a connecting hole 31 is provided through the center of the turntable 3, and a sealing element 10 is embedded in the connecting hole 31. The first pipeline 71 is formed within the sealing element 10, with one end of the first pipeline 71 communicating with the conveying channel 921 and the other end communicating with the first branch 721. The sealing element 10 seals the connection between the support 42 and the rotating shaft 92, effectively preventing hydraulic oil leakage during conveying and ensuring sealing and reliability. The first pipeline 71 allows hydraulic oil to smoothly enter the first branch 721 from the conveying channel 921, providing stable power to the hydraulic actuator 61 and further improving the machining performance of the fixture.

[0054] It is understood that the description of the hydraulic pipeline 7 in this embodiment is merely an exemplary illustration for ease of understanding. In actual use, each component should have at least two hydraulic pipelines 7. The two hydraulic pipelines 7 are used to supply hydraulic oil to the hydraulic actuator 61 and to output hydraulic oil from the hydraulic actuator 61, respectively. Therefore, at least two first pipelines 71 and second pipelines 72 are provided. One end of one first pipeline 71 is connected to the pipeline inlet 73, and the other end is connected to the hydraulic actuator 61 through one of the second pipelines 72. Then, the other second pipeline 72 is connected to the hydraulic actuator 61, and the other end is connected to the pipeline outlet 74 through another first pipeline 71. This achieves stable oil supply.

[0055] Of course, the second pipeline 72 for supplying hydraulic oil to the hydraulic actuator 61 can have multiple output ends, each output end being connected to each hydraulic actuator 61, thereby realizing simultaneous oil supply to each hydraulic actuator 61; in addition, the second pipeline 72 for outputting hydraulic oil can also have multiple input ends, each input end being connected to each hydraulic actuator 61, and the hydraulic oil output from each hydraulic actuator 61 can be collected and discharged into the second pipeline 72.

[0056] In other words, at least two conveying channels 921 are provided, one for conveying hydraulic oil to the hydraulic actuator 61 and the other for discharging hydraulic oil; at least two first pipelines 71 are provided, one for conveying hydraulic oil to the hydraulic actuator 61 and the other for discharging hydraulic oil. It can be understood that, to ensure a stable delivery of hydraulic oil, the channels for conveying hydraulic oil to the hydraulic actuator 61 are sequentially connected to each other, and the channels for discharging hydraulic oil from the hydraulic actuator 61 are sequentially connected.

[0057] Optionally, the pipeline inlet 73 and the pipeline outlet 74 are spaced apart on the housing 91 along the axial direction of the rotating shaft 92. The rotating shaft 92 is provided with four retaining rings 93 spaced apart along its own axial direction. A retaining space 94 is formed between two adjacent retaining rings 93. The retaining rings 93 are fixedly disposed inside the housing 91. The rotating shaft 92 is rotatably disposed on the retaining rings 93. The pipeline inlet 73 is connected to the conveying channel 921 for conveying hydraulic oil through one of the retaining spaces 94. The pipeline outlet 74 is connected to the conveying channel 921 for outputting hydraulic oil through one of the retaining spaces 94.

[0058] In some embodiments, a plurality of limiting posts 11 are spaced apart on the base 41, and each limiting post 11 encloses a limiting interval 12, within which the front housing 5 is disposed. The limiting interval 12 formed by the plurality of limiting posts 11 defines the approximate position of the front housing 5 on the base 41 and also provides preliminary limiting of the periphery of the front housing 5, thus providing a good foundation for the fixation of the fixing mechanism 6.

[0059] In some embodiments, at least two positioning posts 13 are spaced apart on the base 41, and at least two limiting holes 51 are provided on the front housing 5. The two positioning posts 13 are correspondingly inserted into the two limiting holes 51. The cooperation between the positioning posts 13 and the limiting holes 51 enables the front housing 5 to be quickly positioned on the machining base 4, improving clamping efficiency.

[0060] Optionally, a guide structure 131 is formed at the top of the positioning post 13. The periphery of the positioning post 13 includes two opposing positioning side surfaces 132, which are connected by two clearance side surfaces 133. The positioning side surfaces 132 are fitted against the inner wall surface of the corresponding limiting hole 51, and a clearance gap 14 is formed between the clearance side surfaces 133 and the inner wall surface of the corresponding limiting hole 51. The guide structure 131 facilitates the insertion of the positioning post 13 into the limiting hole 51, improving the accuracy and convenience of positioning. The fitting of the positioning side surface 132 with the inner wall surface of the limiting hole 51 enables precise positioning, while the clearance gap 14 between the clearance side surface 133 and the inner wall surface of the limiting hole 51 provides for assembly error, ensuring that each positioning post 13 can be stably inserted into the corresponding limiting hole 51, and avoiding interference between the positioning post 13 and the limiting hole 51.

[0061] like Figures 1 to 13As shown above, the gearbox front housing 5 machining fixture provided in this application places the front housing 5 within the limiting range 12 of the base 41 and initially fixes it by inserting the positioning pin 13 into the limiting hole 51. Then, the hydraulic actuator 61 drives the movement of the fixing member 62, which acts on the front housing 5, thereby limiting and fixing the front housing 5 on the machining seat 4. The rotation of the rotating shaft 92 drives the turntable 3 to rotate synchronously, which in turn drives the rotation of the machining seat 4. During the machining of the front housing 5, the posture of the front housing 5 can be adjusted, improving the flexibility and adaptability of the machining process. Pipe inlet 73 and pipe outlet 74 are used to connect to the external hydraulic system to provide power to the hydraulic actuator 61. By setting the hydraulic pipe 7 inside the rotating shaft 92, turntable 3, stand 42 and base 41, the hydraulic actuator 61 is connected, thereby realizing the delivery and output of hydraulic oil to the hydraulic actuator 61 inside the fixture. This reduces the complexity of the external pipeline, improves the overall integrity and aesthetics of the fixture, and also facilitates maintenance and repair. It solves the problem that the hydraulic pipes 7 of the existing machining fixture are prone to mutual interference, which affects the machining process.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A machining fixture for the front housing of a gearbox, characterized in that, include: A frame (1) is provided with two uprights (2) spaced apart on the frame (1), and a turntable (3) is rotatably provided on the uprights (2). The processing base (4) is connected to the two turntables (3) at both ends, and the front box (5) is placed on the processing base (4). Multiple sets of fixing mechanisms (6) are spaced apart on the machining base (4). Each fixing mechanism (6) includes a hydraulic actuator (61) mounted on the machining base (4), and a fixing member (62) is connected to the hydraulic actuator (61). The fixing member (62) is used to fix the front housing (5). The hydraulic pipeline (7) includes a first pipeline (71) and a second pipeline (72) connected to each other. The first pipeline (71) is formed inside the turntable (3), and the second pipeline (72) is formed inside the processing seat (4) and connected to each of the hydraulic actuators (61). The stand (2) is also provided with a pipeline inlet (73) and a pipeline outlet (74) connected to the first pipeline (71).

2. The transmission front case machining jig according to claim 1, characterized by: The processing base (4) includes a base (41), the fixing mechanism (6) is disposed on the base (41), and both ends of the base (41) are provided with uprights (42), and the two uprights (42) are respectively connected to the two turntables (3); the second pipeline (72) includes a first branch (721) formed on the upright (42) and a second branch (722) formed on the base (41), and the first branch (721) and the second branch (722) are connected.

3. The transmission front case machining jig according to claim 2, characterized by: The turntable (3) and the stand (42) are detachably connected by multiple sets of connecting mechanisms (8). The connecting mechanism (8) includes a first positioning groove (81), a second positioning groove (82), a positioning member (83), and a locking member. The first positioning groove (81) is opened on the turntable (3), and the second positioning groove (82) is opened on the stand (42) and corresponds to the first positioning groove (81). The first end of the positioning member (83) is inserted into the first positioning groove (81) along the radial direction of the turntable (3), and the second end of the positioning member (83) is inserted into the second positioning groove (82). The locking member passes through the stand (42) along the axial direction of the turntable (3) and is used to detachably connect with the positioning member (83).

4. The transmission front case machining jig according to claim 3, characterized by: The stand (42) has a positioning hole (84) extending through the turntable (3) along the axial direction. The positioning hole (84) is connected to the second positioning groove (82). The locking member cooperates with the positioning member (83) through the positioning hole (84).

5. The transmission front case machining jig according to claim 2, characterized by: It also includes two sets of rotating mechanisms (9), which are respectively connected to the two uprights (2). The rotating mechanisms (9) include: A housing (91) is disposed on the support frame (2), and a cavity (911) is formed inside the housing (91). The pipe inlet (73) and the pipe outlet (74) are both opened on the housing (91) and communicate with the cavity (911); and The rotating shaft (92) is located inside the cavity (911) and rotates in conjunction with the outer shell (91). A conveying channel (921) communicating with the cavity (911) is formed inside the rotating shaft (92). The rotating shaft (92) passes through the stand (2) and is connected to the turntable (3). The conveying channel (921) is connected to the first pipeline (71).

6. The gearbox front housing machining fixture as described in claim 5, characterized in that: A connecting hole (31) is provided through the middle of the turntable (3), and a sealing element (10) is embedded in the connecting hole (31). The first pipeline (71) is formed in the sealing element (10). One end of the first pipeline (71) is connected to the conveying channel (921), and the other end of the first pipeline (71) is connected to the first branch (721).

7. The transmission front case machining jig according to claim 2, characterized by: The base (41) is provided with a plurality of limiting posts (11) spaced apart, and each limiting post (11) encloses a limiting interval (12), and the front box (5) is located within the limiting interval (12).

8. The transmission front case machining jig according to claim 2, characterized by: At least two positioning posts (13) are spaced apart on the base (41), and at least two limiting holes (51) are opened on the front box (5). The two positioning posts (13) are inserted into the two limiting holes (51) respectively.

9. The transmission front case machining jig according to claim 8, characterized by: The top of the positioning post (13) has a guide structure (131). The periphery of the positioning post (13) includes two positioning side surfaces (132) arranged opposite to each other. The two positioning side surfaces (132) are connected by two clearance side surfaces (133). The positioning side surface (132) fits against the inner wall surface of the corresponding limiting hole (51). A clearance gap (14) is formed between the clearance side surface (133) and the inner wall surface of the corresponding limiting hole (51).

10. The gearbox front housing machining fixture as described in claim 1, characterized in that: The part of the fastener (62) that is used to cooperate with the front box (5) is a fixing part, and a flexible part (63) is provided on the fixing part.

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