A clamp for intermediate shaft and two-axis milling key

Abstract

The utility model relates to a fixture, in particular to a fixture for intermediate shafts and two-axis milling keys, which solves the problem that when performing intermediate shaft and two-axis processing conversion, the corresponding fixture needs to be replaced as a whole, which wastes production time and makes the processing efficiency relatively low. The utility model comprises a base plate and a fixed center and a movable center which are relatively arranged on the base plate and are used to cooperate with the center holes at both ends of the intermediate shaft or the two shafts to achieve axial positioning. An intermediate shaft angular positioning piece is arranged on the base plate, and the intermediate shaft angular positioning piece cooperates with the gear tooth groove on the intermediate shaft through the intermediate shaft tooth piece in its first guide hole to complete the rotation limit of the intermediate shaft; a two-axis angular positioning piece is also arranged on the base plate, and the two-axis angular positioning piece cooperates with the spline groove on the two shafts through the two-axis tooth piece in its second guide hole to complete the rotation limit of the two shafts.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a clamp for an intermediate shaft and a two-axis milling key. Background Art

[0002] The gearbox is one of the important parts of a car. The power of the car engine is input through one shaft of the gearbox, and different gears are obtained through the meshing of the gear sets on the intermediate shaft and finally output through the second shaft. Therefore, the intermediate shaft is provided with gears for meshing transmission, and the second shaft is provided with splines for connecting with other transmission components. When milling keys on the intermediate shaft or the second shaft, it is necessary to limit the rotational freedom of the two. The commonly used method is to limit the rotational freedom of the intermediate shaft by limiting the rotation of the gears of the intermediate shaft, and limiting the rotational freedom of the second shaft is achieved by limiting the rotation of its splines. Because the structures of gears and splines are different, when limiting the rotational freedom, the corresponding limiter structures of the two are also different. Therefore, two types of fixtures need to be made to meet the clamping requirements of the intermediate shaft and the second shaft respectively. When processing machine tools are in short supply, one machine tool will be responsible for the milling key processing of both the intermediate shaft and the second shaft. Usually, after processing one shaft system, the corresponding fixture of the other shaft needs to be replaced. These fixtures are large in size and heavy in weight, and it is difficult to replace them by manpower alone. Usually, the lifting equipment in the workshop is needed to replace the whole part, and the assistance of two people is required, resulting in low processing efficiency.

[0003] A Chinese invention patent with application publication number CN113579807A discloses a clamping fixture for milling keyways at both ends of a crankshaft, comprising a horizontal base plate, a support structure being provided on the base plate, the support structure having two V-shaped support surfaces spaced apart along the longitudinal direction of the base plate, and the two ends of the crankshaft to be processed can be overlapped and placed on the two V-shaped support surfaces respectively; a positioning center device and a clamping center device are respectively provided on the outer sides of the two ends of the crankshaft to be inspected on the base plate; the positioning center device comprises a horizontal positioning center, the tip of which can abut against the center hole at one end of the crankshaft to limit the axial position of the crankshaft; the clamping center device comprises a clamping center, a longitudinal movement control structure is provided between the clamping center and the base plate so that the clamping center can move toward the end face of the crankshaft and the tip of which abuts against the center hole of the end face of the crankshaft; a push plate is provided on the base plate and corresponding to the crankshaft crank. The above invention has the advantages of high clamping quality and the ability to improve the keyway position accuracy, but it can still only clamp one type of shaft system. When switching between the intermediate shaft and the second shaft, the fixture still needs to be replaced as a whole, and the processing efficiency is relatively low. Utility Model Content

[0004] The utility model aims to solve the problem that when performing intermediate shaft and second axis processing conversion, the corresponding fixture needs to be replaced as a whole, which wastes production time and makes the processing efficiency relatively low, and provides a fixture for intermediate shaft and second axis milling key.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A clamp for an intermediate shaft and a two-axis milling key, which is special in that it comprises a base plate, a top, a two-axis angular positioning piece and an intermediate shaft angular positioning piece;

[0007] The top comprises a fixed top and a movable top which are relatively arranged on the bottom plate, the fixed top and the movable top are used to abut against the center holes at both ends of the intermediate shaft or the two shafts to limit the axial position of the intermediate shaft or the two shafts, and a horizontal motion mechanism is arranged at the bottom of the movable top, the horizontal motion mechanism is used to drive the movable top to move in the horizontal direction;

[0008] The intermediate shaft angular positioning member is used to limit the rotation of the intermediate shaft, including a base arranged on the bottom plate, the base is provided with a first guide hole in the horizontal direction, an intermediate shaft gear piece is slidably mounted in the first guide hole, the intermediate shaft gear piece includes an intermediate shaft gear head for matching with the gear tooth groove on the intermediate shaft and a translation rod slidably mounted in the first guide hole, a threaded hole is provided on the top surface of the base corresponding to the position of the first guide hole, a first eccentric shaft is screwed in the threaded hole, the first eccentric shaft includes a first threaded section screwed in the threaded hole and a first eccentric section mounted in the long hole of the translation rod, and the first eccentric section can drive the intermediate shaft gear piece to move in the horizontal direction when rotating in the long hole;

[0009] The two-axis angular positioning member is used to limit the rotation of the two axes, including an L-shaped bracket arranged on the base plate, the horizontal plate of the L-shaped bracket is connected to the base plate, the outer side surface of the vertical plate of the L-shaped bracket is connected to the installation box, the top of the installation box is provided with a second guide hole, and a two-axis gear member is slidably assembled in the second guide hole. The two-axis gear member includes a two-axis gear head for matching with the spline grooves on the two axes and a lifting rod slidably assembled in the second guide hole, a long hole is provided on the lifting rod, and a threaded hole is provided on the outer side surface of the installation box, a second eccentric shaft is screwed in the threaded hole, the second eccentric shaft includes a second threaded section screwed in the threaded hole and a second eccentric section installed in the long hole, and the second eccentric section can drive the two-axis gear member to move in the vertical direction when rotating in the long hole.

[0010] Furthermore, it also includes a hydraulic clamping mechanism, which includes a hydraulic base installed on the bottom plate, a hydraulic lifting rod is arranged in the hydraulic base along the vertical direction, the top end of the hydraulic lifting rod is connected to a pressing plate, and the pressing plate is arranged perpendicular to the hydraulic lifting rod.

[0011] Furthermore, it also includes a support frame, which is at least one and corresponds to the pressure plate. It includes a support set on the bottom plate and a V-shaped bracket installed on the support. The V-shaped bracket is used to abut against the bottom of the intermediate shaft or the second shaft to support it.

[0012] Furthermore, two installation boxes are provided, including a first installation box and a second installation box. The two-axis tooth head of the two-axis tooth part installed in the first installation box is an A-type structure, which is used to cooperate with the spline groove with an even number of teeth; the two-axis tooth head of the two-axis tooth part installed in the second installation box is a V-type structure, which is used to cooperate with the spline groove with an odd number of teeth.

[0013] Furthermore, the horizontal motion mechanism includes a linear guide rail installed on the base plate and extending in the horizontal direction, and a linear slider arranged at the bottom of the moving top for cooperating with the linear guide rail. The moving top is also connected to a hydraulic drive device, which is used to drive the moving top to move in the horizontal direction.

[0014] Furthermore, the base includes a cover plate arranged on the top, the cover plate is fixed to the base by bolts, the threaded holes are arranged on the cover plate, and the threaded holes will be worn out due to frequent use. Arranging them on the cover plate facilitates replacement after damage.

[0015] Furthermore, the first installation box and the second installation box are both fixed to the outer side of the vertical plate of the L-shaped bracket by bolts, and the outer sides of the first installation box and the second installation box are both connected with a gland by bolts, and the threaded hole is set on the gland.

[0016] Furthermore, the outer end surfaces of the first thread segment and the second thread segment are both provided with hexagonal grooves for cooperating with an inner hexagonal wrench, so as to facilitate rotation by an operator.

[0017] Furthermore, the outer end surface of the first eccentric segment is provided with a first process segment, and the first process segment is coaxial with the first thread segment; the outer end surface of the second eccentric segment is provided with a second process segment, and the second process segment is coaxial with the second thread segment.

[0018] Furthermore, an auxiliary support is provided on the bottom plate, the support head of the auxiliary support is connected to the pressing plate, and the support head is located in the middle of the pressing plate, and the hydraulic lifting rod is connected to the outer end of the pressing plate. The auxiliary support plays a supporting role on the pressing plate, and cooperates with the hydraulic lifting rod to better realize the clamping function.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] (1) The utility model provides a fixture for intermediate shaft and two-axis milling key, including an intermediate shaft angular positioning member and a two-axis angular positioning member arranged on a base plate, wherein the intermediate shaft angular positioning member is used to cooperate with the gear tooth groove on the intermediate shaft to achieve the purpose of limiting the rotation of the intermediate shaft, and the two-axis angular positioning member is used to cooperate with the spline groove on the two shafts to achieve the purpose of limiting the rotation of the two shafts. Because the axial positioning mechanism of the intermediate shaft and the two shafts is the same, both of which realize axial positioning by cooperating with the fixed center and the movable center with the center holes at both ends of the intermediate shaft or the two shafts, the intermediate shaft angular positioning member and the two-axis angular positioning member are integrated into a base plate. When milling the key of the intermediate shaft, the two-axis angular positioning member can be removed to prevent it from interfering with the intermediate shaft. When milling the key of the two shafts, the intermediate shaft angular positioning member is removed instead of replacing a whole set of fixtures as before. The two angular positioning members are small in size and light in weight, and can be replaced by one operator. When replacing, there is no need to rely on lifting equipment and the help of other personnel, which saves manpower and material resources and improves production efficiency.

[0021] (2) The utility model provides a clamp for an intermediate shaft and a second axis milling key, in which a hydraulic clamping mechanism and a support frame are also provided. The pressure plate of the hydraulic clamping mechanism can clamp the intermediate shaft or the second axis under the drive of the hydraulic lifting rod. The support frame is arranged at the bottom of the intermediate shaft or the second axis, and its V-shaped bracket is used to abut against the bottom of the intermediate shaft or the second axis to support it, thereby ensuring the stability of the clamping.

[0022] (3) The utility model provides a two-axis angular positioning member of a clamp for an intermediate shaft and a two-axis milling key, which has two-axis gear parts of two different shapes, wherein the two-axis gear head of the two-axis gear part located in the first installation box is an A-type structure for cooperating with the spline groove of the even-numbered teeth, and the two-axis gear head of the two-axis gear part located in the second installation box is a V-type structure for cooperating with the spline groove of the odd-numbered teeth. The A-type two-axis gear head and the V-type two-axis gear head can be flexibly selected according to the actual situation of the spline grooves on the two shafts, thereby increasing applicability and ensuring the limiting effect.

[0023] (4) The utility model provides a clamp for an intermediate shaft and a two-axis milling key, wherein the outer end face of the first eccentric section is provided with a first process section, and the first process section is coaxial with the first thread section; the outer end face of the second eccentric section is provided with a second process section, and the second process section is coaxial with the second thread section. Because it is difficult to directly process the eccentric section on a machine tool, the first process section and the second process section are provided to facilitate clamping the eccentric shaft on the machine tool for processing, thereby reducing the processing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the intermediate shaft and the two-axis milling key clamp embodiment of the utility model when the intermediate shaft is clamped (the linear guide rail and the hydraulic drive device are not shown in the figure);

[0025] Figure 2 This is a top view of the clamp for the intermediate shaft and two-axis milling key of the utility model in a two-axis clamping state (the linear slide, linear guide rail and hydraulic drive device are not shown in the figure);

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the intermediate shaft angular positioning member in the embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the cooperation between the first eccentric shaft and the intermediate shaft with the gear member in the embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the first eccentric shaft in the embodiment of the utility model;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the two-axis angular positioning member in the embodiment of the utility model;

[0030] Figure 7 It is a three-dimensional structural schematic diagram of a two-axis gear member of an A-type structure in an embodiment of the utility model;

[0031] Figure 8 It is a three-dimensional structural schematic diagram of a two-axis gear member of a V-shaped structure in an embodiment of the utility model;

[0032] Fig. 9 This is a schematic diagram of the three-dimensional structure of the second eccentric shaft in the embodiment of the utility model;

[0033] Fig.10 It is a front view of the intermediate shaft in the embodiment of the utility model;

[0034] Fig.11 for Fig.10 MM-direction local cross-section;

[0035] Fig.12 for Fig.10 NN-direction local cross-section diagram;

[0036] Fig.13 It is a front view of the second shaft in the embodiment of the utility model;

[0037] Fig.14 for Fig.13 MM section view;

[0038] Fig.15 for Fig.13 NN section view.

[0039] The following are the descriptions of the reference numerals:

[0040] 1-bottom plate, 2-fixed top, 3-movable top, 4-intermediate shaft angular positioning member, 41-base, 42-intermediate shaft gear member, 43-first eccentric shaft, 431-first threaded section, 432-first eccentric section, 433-first process section; 44-cover plate; 5-two-axis angular positioning member, 51-L-shaped bracket, 52-installation box, 521-first installation box, 522-second installation box, 53-two-axis gear member, 54-second eccentric shaft, 541-second threaded section, 542-second eccentric section, 543-second process section; 55-pressure cover; 6-intermediate shaft, 7-two shafts, 8-hydraulic clamping mechanism, 81-hydraulic base, 82-hydraulic lifting rod, 83-pressing plate; 9-support frame, 91-support, 92-V-shaped bracket; 10-linear slider, 11-auxiliary support member. DETAILED DESCRIPTION

[0041] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0042] like Figure 1-Figure 15 As shown, the clamp for intermediate shaft and two-axis milling key of the utility model includes a base plate 1, and a fixed top 2 and a movable top 3 relatively arranged on the base plate 1, the fixed top 2 and the movable top 3 are used to abut against the center holes at both ends of the intermediate shaft 6 or the second shaft 7 to axially limit the intermediate shaft 6 or the second shaft 7, wherein the fixed top 2 is fixed to the base plate 1 by bolts, because the lengths of the intermediate shaft 6 and the second shaft 7 are long and short, in order to adapt to different lengths, a horizontal movement mechanism for driving the movable top 3 to move horizontally is also provided at the bottom of the movable top 3, which includes a linear guide rail installed on the base plate 1 and extending in the horizontal direction, and a linear slider 10 arranged at the bottom of the movable top 3, the linear guide rail cooperates with the linear slider 10, and can guide the movable top 3 to move in the horizontal direction, a hydraulic drive device is connected to the movable top 3, and starting the hydraulic drive device can drive the movable top 3 to move in the horizontal direction, and the hydraulic drive device can be a hydraulic cylinder, etc.

[0043] In order to clamp the intermediate shaft 6 or the second shaft 7, a hydraulic clamping mechanism 8 is arranged on the bottom plate 1, including a hydraulic base 81 installed on the bottom plate 1 by bolts, a hydraulic lifting rod 82 is arranged in the hydraulic base 81 along the vertical direction, and a pressing plate 83 is connected to the top of the hydraulic lifting rod 82. The pressing plate 83 is arranged perpendicular to the hydraulic lifting rod 82. The pressing plate 83 can move in the vertical direction under the drive of the hydraulic lifting rod 82. When it is necessary to clamp the intermediate shaft 6 or the second shaft 7, the hydraulic lifting rod 82 drives the pressing plate 83 to move downward, and the pressing plate 83 It abuts against the outer circumferential surface of the intermediate shaft 6 or the second shaft 7 to achieve clamping, and an auxiliary support member 11 is also arranged on the base plate 1, and the support head of the auxiliary support member 11 is connected to the pressure plate 83, and the support head is located in the middle position of the pressure plate 83, and the hydraulic lifting rod 82 is connected to the outer end of the pressure plate 83, so that during the up and down movement of the pressure plate 83, the auxiliary support member 11 supports it, and the hydraulic lifting rod 82 cooperates with the auxiliary support member 11 to better clamp the intermediate shaft 6 or the second shaft 7, thereby reducing the shaking during the milling key processing.

[0044] When the pressure plate 83 is tightened, the intermediate shaft 6 or the second shaft 7 will be subjected to a vertical downward force, causing the shaft system to bend slightly. In order to balance this vertical downward pressure, a support frame 9 is arranged at a position corresponding to the pressure plate 83. There are two support frames 9, each of which includes a support 91 fixed to the base plate 1 by bolts and a V-shaped bracket 92 installed on the support 91. When the V-shaped bracket 92 is undergoing key milling processing, it can abut against the bottom of the intermediate shaft 6 or the second shaft 7 to support it, so that the entire shaft system is subjected to balanced force.

[0045] In order to limit the rotation of the intermediate shaft 6, an intermediate shaft angular positioning member 4 is provided on the bottom plate 1, and its structure is as follows: Figure 3-Figure 5As shown, it includes a base 41 arranged on the bottom plate 1, the base 41 is provided with a first guide hole in the horizontal direction, an intermediate shaft gear member 42 is slidably mounted in the first guide hole, the intermediate shaft gear member 42 includes an intermediate shaft gear head and a translation rod slidably mounted in the first guide hole, a cover plate 44 is arranged on the top of the base 41, the cover plate 44 is connected to the base 41 by bolts, and a threaded hole is arranged on the cover plate 44 corresponding to the position of the first guide hole, a first eccentric shaft 43 is screwed in the threaded hole, the first eccentric shaft 43 includes a first threaded section 431 screwed in the threaded hole and a first eccentric shaft 43 is installed in the long hole of the translation rod. The first eccentric section 432 rotates in the long hole of the translation rod when the first threaded section 431 is rotated, thereby driving the intermediate shaft gear 42 to move along the extension direction of the first guide hole. When the intermediate shaft gear head moves to the gear tooth groove of the intermediate shaft 6, it will be stuck in the tooth groove to limit the rotation of the intermediate shaft 6. In this way, the clamping of the intermediate shaft 6 is completed. In order to facilitate the rotation of the first eccentric shaft 43, a hexagonal groove for cooperating with an inner hexagonal wrench is provided on the outer end surface of the first threaded section 431. The first eccentric shaft 43 can be rotated by an inner hexagonal wrench, which has a simple structure and is convenient and labor-saving. The structure of the first eccentric shaft 43 is as follows Figure 5 As shown, in addition to the first threaded segment 431 and the first eccentric segment 432, it also includes a first process segment 433 arranged on the outer end face of the first eccentric segment 432. The first process segment 433 is coaxial with the first threaded segment 431. Because it is difficult to directly process the first eccentric segment 432 on a machine tool, with the first process segment 433, it is convenient to clamp the entire first eccentric shaft 43 on the machine tool for processing, which can simplify the processing difficulty of the first eccentric shaft 43.

[0046] In order to realize the rotation limit of the two shafts 7, a two-axis angular positioning member 5 is provided on the bottom plate 1, which includes an L-shaped bracket 51 arranged on the bottom plate 1, and the L-shaped bracket 51 includes a horizontal plate and a vertical plate vertically arranged at one end of the horizontal plate. The horizontal plate is connected to the bottom plate 1 by bolts, and an installation box 52 is connected to the outer surface of the vertical plate. There are two installation boxes 52, including a first installation box 521 and a second installation box 522. The two installation boxes have the same general structure, but the two-axis tooth heads of the two-axis toothed parts 53 installed thereon are different in shape. A second guide hole is provided on the top of each installation box 52, and a two-axis gear member 53 is slidably mounted in the second guide hole. The two-axis gear member 53 includes a two-axis gear head for matching with the spline groove on the two shafts 7 and a lifting rod slidably mounted in the second guide hole. The lifting rod is provided with a long hole. A pressure cover 55 is provided on the outer side of the installation box 52. The pressure cover 55 is connected to the outer side of the installation box 52 by bolts. A threaded hole is provided on the pressure cover 55. A second eccentric shaft 54 ​​is screwed into the threaded hole. The structure of the second eccentric shaft 54 ​​is as follows: Fig. 9As shown, it includes a second threaded segment 541 screwed into the threaded hole and a second eccentric segment 542 installed in the elongated hole of the lifting rod. When the second eccentric segment 542 rotates in the elongated hole, it can drive the second-axis gear member 53 to move in the vertical direction. When the second-axis gear head moves into the spline groove of the second shaft 7 in the vertical direction, the rotation of the second shaft 7 can be limited. In order to facilitate the rotation of the second eccentric shaft 54, a hexagonal groove is provided on the outer end face of the second threaded segment 541, which is used to cooperate with an inner hexagonal wrench, and a second process segment 543 is provided on the outer end face of the second eccentric segment 542. The second process segment 543 is coaxial with the second threaded segment 541. The second process segment 543 has the same function as the first process segment 433, both of which are for convenient processing.

[0047] There are generally two groups of spline grooves on the two shafts 7 to be clamped, and the number of teeth on the spline grooves is odd and even. In this embodiment, the two-shaft tooth head of the two-shaft tooth part 53 located in the first installation box 521 is an A-type structure, which is used to cooperate with the spline grooves with an even number of teeth; the two-shaft tooth head of the two-shaft tooth part 53 installed in the second installation box 522 is a V-type structure, which is used to cooperate with the spline grooves with an odd number of teeth. Of course, the two-shaft tooth head with an A-type structure and the two-shaft tooth head with a V-type structure can be flexibly selected according to the actual situation of the number of teeth on the spline grooves on the two shafts 7 to be clamped, which improves the applicability of the clamp and ensures the limiting effect.

[0048] When in use, if the intermediate shaft 6 is processed first, the two-axis angular positioning member 5 is removed first, and only the intermediate shaft angular positioning member 4 is retained to prevent it from interfering with the intermediate shaft 6. When processing the intermediate shaft 6, the middle hole at one end of the intermediate shaft 6 is first aligned with the fixed top 2, and the hydraulic drive device is started to move the movable top 3 toward the fixed top 2, so that the fixed top 2 and the movable top 3 respectively abut against the center holes at both ends of the intermediate shaft 6, completing the axial positioning of the intermediate shaft 6. Then, the first eccentric shaft 43 in the intermediate shaft angular positioning member 4 is rotated by the hexagonal wrench. When the first eccentric shaft 43 rotates, it will drive the intermediate shaft gear member 42 to move until the intermediate shaft gear head is stuck in the gear tooth groove on the intermediate shaft 6, limiting the rotation of the intermediate shaft 6. Then, the hydraulic lifting rod 82 drives the pressing plate 83 to press the intermediate shaft 6, completing the clamping of the intermediate shaft 6 before the milling key processing.

[0049] If the second shaft 7 is to be processed, it is necessary to remove the intermediate shaft angular positioning member 4 and only retain the second shaft angular positioning member 5. The axial positioning of the second shaft 7 is the same as that of the intermediate shaft 6. When performing rotation limiting, it is necessary to select a second shaft gear member 53 with an A-type structure for the second shaft gear head or a second shaft gear member 53 with a V-type structure for the second shaft gear head according to the actual situation of the spline groove on the second shaft 7. After selecting the corresponding second shaft gear member 53, rotate the second eccentric shaft 54 ​​with an Allen wrench. When the second eccentric shaft 54 ​​rotates, it will drive the second shaft gear member 53 to move in the vertical direction until the second shaft gear head is stuck in the spline groove on the second shaft 7, limiting the rotation of the second shaft 7. Then the hydraulic lifting rod 82 drives the pressure plate 83 to press the second shaft 7, completing the clamping of the second shaft 7 before the key milling processing.

[0050] The utility model combines two clamps into one. When performing processing switching between the intermediate shaft 6 and the second shaft 7, only the corresponding angular positioning parts need to be replaced. The angular positioning parts are small in size and light in weight, and can be replaced by one person without using the lifting equipment in the workshop or the cooperation of other people. The time and manpower and material resources wasted in replacing the overall clamp are saved, and the production efficiency is improved.

[0051] The embodiments described above are merely descriptions of the specific implementation methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A clamp for intermediate shaft and two-axis milling key, characterized in that: It comprises a bottom plate (1), a top, a two-axis angular positioning member (5) and an intermediate axis angular positioning member (4); The top point comprises a fixed top point (2) and a movable top point (3) which are arranged relatively on the bottom plate (1); the fixed top point (2) and the movable top point (3) are used to abut against the center holes at both ends of the intermediate shaft (6) or the second shaft (7) so as to limit the axial position of the intermediate shaft (6) or the second shaft (7); a horizontal movement mechanism is arranged at the bottom of the movable top point (3); the horizontal movement mechanism is used to drive the movable top point (3) to move in the horizontal direction; The intermediate shaft angular positioning member (4) is used to limit the rotation of the intermediate shaft (6), and includes a base (41) arranged on the bottom plate (1), the base (41) is provided with a first guide hole in the horizontal direction, an intermediate shaft gear member (42) is slidably mounted in the first guide hole, the intermediate shaft gear member (42) includes an intermediate shaft gear head for matching with the gear tooth groove on the intermediate shaft (6) and a translation rod slidably mounted in the first guide hole, a threaded hole is provided on the top surface of the base (41) corresponding to the position of the first guide hole, a first eccentric shaft (43) is screwed in the threaded hole, the first eccentric shaft (43) includes a first threaded section (431) screwed in the threaded hole and a first eccentric section (432) mounted in the long hole of the translation rod, and the first eccentric section (432) can drive the intermediate shaft gear member (42) to move in the horizontal direction when rotating in the long hole; The two-axis angular positioning member (5) is used to limit the rotation of the two axes (7), and comprises an L-shaped bracket (51) arranged on the bottom plate (1), the horizontal plate of the L-shaped bracket (51) is connected to the bottom plate (1), the outer side surface of the vertical plate of the L-shaped bracket (51) is connected to the installation box (52), the top of the installation box (52) is provided with a second guide hole, and a two-axis toothed member (53) is slidably mounted in the second guide hole, and the two-axis toothed member (53) comprises a spline groove for cooperating with the two axes (7). The two-axis toothed head and the lifting rod are slidably assembled in the second guide hole. The lifting rod is provided with a long hole. A threaded hole is provided on the outer surface of the installation box (52). A second eccentric shaft (54) is screwed into the threaded hole. The second eccentric shaft (54) includes a second threaded section (541) screwed into the threaded hole and a second eccentric section (542) installed in the long hole. When the second eccentric section (542) rotates in the long hole, it can drive the two-axis toothed member (53) to move in the vertical direction.

2. The fixture for intermediate shaft and two-axis milling key according to claim 1, characterized in that: It also includes a hydraulic clamping mechanism (8), which includes a hydraulic base (81) installed on the base plate (1), a hydraulic lifting rod (82) is arranged in the hydraulic base (81) along the vertical direction, and a pressing plate (83) is connected to the top end of the hydraulic lifting rod (82), and the pressing plate (83) is arranged perpendicular to the hydraulic lifting rod (82).

3. The fixture for intermediate shaft and two-axis milling key according to claim 2, characterized in that: It also includes a support frame (9), at least one of which is provided and corresponds to the pressure plate (83), and includes a support (91) provided on the bottom plate (1) and a V-shaped support (92) installed on the support (91), the V-shaped support (92) being used to abut against the bottom of the intermediate shaft (6) or the second shaft (7) to support it.

4. The fixture for intermediate shaft and two-axis milling key according to claim 3, characterized in that: The installation boxes (52) are provided with two, including a first installation box (521) and a second installation box (522). The two-axis tooth head of the two-axis tooth member (53) installed in the first installation box (521) is an A-type structure, which is used to cooperate with a spline groove with an even number of teeth; the two-axis tooth head of the two-axis tooth member (53) installed in the second installation box (522) is a V-type structure, which is used to cooperate with a spline groove with an odd number of teeth.

5. The clamp for intermediate shaft and two-axis milling key according to claim 4, characterized in that: The horizontal movement mechanism comprises a linear guide rail installed on a base plate (1) and extending in a horizontal direction, and a linear slider (10) arranged at the bottom of a moving top (3) and used to cooperate with the linear guide rail. The moving top (3) is also connected to a hydraulic drive device, and the hydraulic drive device is used to drive the moving top (3) to move in a horizontal direction.

6. The fixture for intermediate shaft and two-axis milling key according to claim 5, characterized in that: The base (41) comprises a cover plate (44) arranged on the top, the cover plate (44) is fixed on the base (41) by bolts, and the threaded hole is arranged on the cover plate (44).

7. The fixture for intermediate shaft and two-axis milling key according to claim 4, characterized in that: The first installation box (521) and the second installation box (522) are both fixed to the outer side surface of the vertical plate of the L-shaped bracket (51) by means of bolts, and the outer side surfaces of the first installation box (521) and the second installation box (522) are both connected to a pressure cover (55) by means of bolts, and the threaded hole is provided on the pressure cover (55).

8. The fixture for intermediate shaft and two-axis milling key according to claim 7, characterized in that: The outer end surfaces of the first thread segment (431) and the second thread segment (541) are both provided with a hexagonal groove for matching with a hexagonal wrench.

9. The clamp for intermediate shaft and two-axis milling key according to claim 8, characterized in that: The outer end surface of the first eccentric section (432) is provided with a first process section (433), and the first process section (433) is coaxial with the first thread section (431); the outer end surface of the second eccentric section (542) is provided with a second process section (543), and the second process section (543) is coaxial with the second thread section (541).

10. The clamp for intermediate shaft and two-axis milling key according to claim 9, characterized in that: An auxiliary support member (11) is arranged on the bottom plate (1), a support head of the auxiliary support member (11) is connected to the pressing plate (83), and the support head is located in the middle of the pressing plate (83), and the hydraulic lifting rod (82) is connected to the outer end of the pressing plate (83).

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