A mounting bracket for machining planetary gearbox housing

Abstract

This utility model relates to the field of planetary reducer technology, specifically disclosing a fixing frame for processing planetary reducer housings, including: a base, a clamping mechanism on the top surface of the base, a top frame connected to the clamping mechanism via a support rod, and a pressing mechanism between the top frame and a pressing plate; the clamping mechanism drives the clamping plate to move via an adjustable bidirectional lead screw and sprocket chain transmission, and the pressing mechanism presses down on the pressing plate via a displacement bidirectional lead screw. Furthermore, the clamping plate is equipped with a rubber buffer pad, which, together with the auxiliary positioning mechanism's double-headed motor, unidirectional lead screw, and guide structure, achieves multi-directional coordinated fixing and adaptive positioning of the housing. This utility model solves the problems of insufficient positioning constraints and clamping deformation in traditional fixing frames, improves the stability and precision of housing processing, and enhances the applicability to housings of different specifications.

Description

Technical Field

[0001] This utility model belongs to the field of planetary gear reducer technology, specifically relating to a fixing bracket for processing planetary gear reducer housing. Background Technology

[0002] As the key housing housing the planetary gear set and support for the transmission components, the machining accuracy of the planetary gearbox directly affects the torque transmission accuracy and operational stability of the reducer. During milling and boring processes, the core function of the mounting bracket is to accurately position and reliably clamp the gearbox, ensuring that the dimensional and positional accuracy of each machined surface (such as bearing holes and mounting surfaces) meets design requirements. Because the gearbox often has a thin-walled structure, multiple hole systems, and complex shapes, the mounting bracket must employ a reasonable constraint design to counteract the displacement and deformation caused by cutting and clamping forces. Therefore, the positioning and clamping performance of the mounting bracket is a crucial factor determining the machining quality of the gearbox.

[0003] However, existing planetary gearbox housing mounting frames generally adopt a "single-sided positioning + unidirectional clamping" structure, for example, using only the bottom surface of the housing as the main positioning surface and applying clamping force through a single-sided pressure plate. The fundamental flaw of this design is that it fails to effectively constrain the three-dimensional spatial degrees of freedom (movement and rotation in the X / Y / Z axis directions) of the housing: on the one hand, the housing is prone to complex movements such as pitching and swaying during machining, resulting in bearing hole axis misalignment and mounting plane tilting, causing coaxiality and perpendicularity errors during gear assembly; on the other hand, the single-point or single-sided force mode results in insufficient rigid support of the housing, increased cutting vibration, and deterioration of the surface roughness of the hole wall and abnormal machining texture. Utility Model Content

[0004] The purpose of this utility model is to provide a fixing bracket for machining planetary gearbox housings, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A mounting bracket for machining a planetary gearbox housing includes:

[0007] The base has a clamping mechanism on its top surface. Multiple support rods are evenly arranged around the outer periphery of the clamping mechanism. The bottom ends of the multiple support rods are fixedly mounted on the base, and the top ends are all fixedly mounted on a top frame. The top frame is U-shaped and consists of a frame and two horizontal frames. A pressing plate is provided directly below each of the two horizontal frames. The distance between the horizontal frames and the pressing plates is adjusted by a pressing mechanism.

[0008] The clamping mechanism includes a fixed frame fixedly disposed at the center of the top surface of the base. The fixed frame has symmetrical movable slots on both sides of its top surface. An adjustable bidirectional lead screw is rotatably installed in each of the two movable slots. One end of each of the two adjustable bidirectional lead screws passes through the fixed frame and is driven synchronously by the meshing of a sprocket and a ring chain. A first power source is fixedly disposed on the side wall of the fixed frame. The output shaft of the first power source is connected to one of the adjustable bidirectional lead screws. The outer wall of the adjustable bidirectional lead screw is threaded with two moving blocks that fit into the movable slots. The tops of the two moving blocks located in the same direction perpendicular to the axis of the adjustable bidirectional lead screw are fixed together with a clamping plate.

[0009] Preferably, the fixing frame further includes an auxiliary positioning mechanism, which includes a double-headed motor fixedly disposed in the center of the clamping plate. Two adjustment holes are opened on one side of the clamping plate. A one-way lead screw is fixed to the output end of the double-headed motor. An adjustment block is threadedly connected to the outer wall of the one-way lead screw. A connecting block is fixed to the bottom of the adjustment block. An auxiliary positioning rod is slidably inserted into the inside of the connecting block.

[0010] Preferably, the pressing mechanism includes a movable groove formed on the bottom surface of the horizontal frame, in which a displacement bidirectional lead screw is rotatably disposed. A mounting groove is provided on one side of the frame, and a chain drive assembly is provided in the mounting groove. One end of the displacement bidirectional lead screw passes through the horizontal frame into the mounting groove, and at its end, it rotates synchronously with another displacement bidirectional lead screw via the chain drive assembly. A second power source is fixedly disposed on the outer wall of the frame. The output shaft of the second power source passes through the mounting groove and is connected to one of the displacement bidirectional lead screws. Two sliding blocks are threadedly connected to the outer wall of the displacement bidirectional lead screw. The two sliding blocks are slidably embedded in the movable groove, and an upper connecting frame is hinged to its bottom end. A lower connecting frame is hinged to the bottom end of the upper connecting frame, and the bottom end of the lower connecting frame is fixedly disposed on the lower pressing plate.

[0011] Preferably, a limiting groove is formed on one side of the inner wall of the adjusting hole, and a limiting block is slidably installed inside the limiting groove. The top of the limiting block is fixedly connected to the bottom of the connecting block.

[0012] Preferably, guide grooves are provided on both sides of the inner wall of the connecting block, and two guide plates are fixed on the outer wall of the auxiliary positioning rod, with the guide plates slidably connected to the inside of the guide grooves.

[0013] Preferably, a buffer pad is fixed to one side of the clamping plate, and the buffer pad is made of rubber.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The clamping mechanism uses a bidirectional lead screw with adjustable pitch and a chain to mesh and drive the clamping plates on both sides to move synchronously in opposite directions. This, combined with the downward pressing mechanism, uses a bidirectional lead screw to drive the pressing plate to press down in a coordinated manner. This forms a multi-directional coordinated fixation of the front, back and top surfaces of the housing, effectively solving the problem of complex movements such as pitch and sway during housing processing caused by the single-sided positioning of traditional fixing frames. It also reduces the coaxiality error of the bearing holes and improves the positioning accuracy and processing stability. Attached Figure Description

[0016] Figure 1 This is a top perspective view of the present invention;

[0017] Figure 2 This is a bottom-view perspective view of the present invention;

[0018] Figure 3 This is a perspective view of the clamping mechanism of this utility model;

[0019] Figure 4 This is a cross-sectional view of the auxiliary positioning mechanism of this utility model;

[0020] In the diagram: 1. Base; 2. Top frame; 3. Clamping mechanism; 4. Pressing mechanism; 5. Auxiliary positioning mechanism; 6. Support rod; 7. Limiting groove; 8. Limiting block; 9. Guide groove; 10. Guide plate; 11. Buffer pad.

[0021] 21. Frame; 22. Horizontal frame; 23. Lower pressure plate; 31. Fixed frame; 32. First power source; 33. Adjustable bidirectional lead screw; 34. Moving block; 35. Clamping plate; 41. Displacement bidirectional lead screw; 42. Sliding block; 43. Second power source; 44. Upper connecting frame; 45. Lower connecting frame; 51. Dual-head motor; 52. Adjustment hole; 53. One-way lead screw; 54. Adjustment block; 55. Connecting block; 56. Auxiliary positioning rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0024] Embodiment 1:

[0025] Please refer to Figures 1-4 As shown, a fixing frame for machining a planetary reducer housing includes:

[0026] A base 1, on the top surface of the base 1, a clamping mechanism 3 is provided. A plurality of support rods 6 are evenly arranged on the outer periphery of the clamping mechanism 3. The bottom ends of the plurality of support rods 6 are fixedly arranged on the base 1, and the top ends are commonly fixedly provided with a top frame 2. The top frame 2 is in a square shape with a frame 21 and two cross frames 22. Below each of the two cross frames 22, a pressing plate 23 is provided. The distance between the cross frame 22 and the pressing plate 23 is adjusted by a downward pressing mechanism 4.

[0027] The clamping mechanism 3 includes a fixed frame 31 fixedly arranged at the center of the top surface of the base 1. On both sides of the top surface of the fixed frame 31, movable grooves are symmetrically opened. In each of the two movable grooves, an adjustable-distance bidirectional screw rod 33 is rotatably installed. One end of each of the two adjustable-distance bidirectional screw rods 33 penetrates through the fixed frame 31 and is synchronously rotated through the meshing transmission of the sprockets fixedly connected to each other and an endless chain. A first power source 32 is fixedly arranged on the side wall of the fixed frame 31. The output shaft of the first power source 32 is connected to one of the adjustable-distance bidirectional screw rods 33. Two moving blocks 34 that fit the movable grooves are threadedly connected to the outer wall of the adjustable-distance bidirectional screw rod 33. The tops of the two moving blocks 34 located in the same direction perpendicular to the axis of the adjustable-distance bidirectional screw rod 33 are commonly fixed with a clamping plate 35.

[0028] By Figures 1-3It is known that the pressing mechanism includes a moving groove on the bottom surface of the horizontal frame 22, in which a displacement bidirectional lead screw 41 is rotatably installed. A mounting groove is provided on one side of the frame 21, and a chain drive assembly is provided in the mounting groove. One end of the displacement bidirectional lead screw 41 passes through the horizontal frame 22 into the mounting groove, and at the end, it rotates synchronously with another displacement bidirectional lead screw 41 through the chain drive assembly. A second power source 43 is fixedly installed on the outer wall of the frame 21. The output shaft of the second power source 43 passes through the mounting groove and is connected to one of the displacement bidirectional lead screws 41. Two sliding blocks 42 are threadedly connected to the outer wall of the displacement bidirectional lead screw 41. The two sliding blocks 42 are slidably embedded in the moving groove. An upper connecting frame 44 is hinged to the bottom end of the upper connecting frame 44, and a lower connecting frame 45 is hinged to the bottom end of the upper connecting frame 44. The bottom end of the lower connecting frame 45 is fixedly installed on the lower pressure plate 23.

[0029] As can be seen from the above, the base 1 serves as a basic support component, and the clamping mechanism 3 on its top surface is positioned by the fixed frame 31. When the first power source 32 is started, it drives the adjustable bidirectional lead screw 33 to rotate. Through the meshing transmission of the sprocket and the ring chain, the adjustable bidirectional lead screw 33 on both sides rotates synchronously, thereby causing the moving block 34 connected to the outer wall thread to move towards or away from each other in the movable groove, driving the clamping plate 35 to clamp the box body in the front and back directions. At the same time, the support rod 6 fixes the top frame 2 to the outer periphery of the clamping mechanism 3. The horizontal frame 22 of the top frame 2 is connected to the lower pressure plate 23 through the lower pressing mechanism 4. The second power source 43 drives the displacement bidirectional lead screw 41 to rotate. Through the chain transmission component in the mounting groove, the displacement bidirectional lead screw 41 on both sides is operated synchronously, causing the sliding block 42 to slide in the movable groove. Through the hinge transmission of the upper connecting frame 44 and the lower connecting frame 45, the lower pressure plate 23 is driven to press down on the top surface of the box body, thereby forming a multi-directional coordinated fixation of the front, back and top surfaces of the box body. This structure achieves symmetrical movement of the double-sided clamping plates 35 through synchronous transmission of sprockets and chains. Combined with the linkage pressing of the pressing mechanism 4, it solves the problems of box vibration and inaccurate positioning caused by the single-sided positioning of the traditional fixed frame. The stability and accuracy of the box processing are improved through multi-directional constraints.

[0030] Specifically, regarding the above, please refer to... Figure 3 As shown, a buffer pad 11 is fixed to one side of the clamping plate 35. The buffer pad 11 is made of rubber.

[0031] As can be seen from the above, when the clamping mechanism 3 drives the moving block 34 to clamp the clamping plate 35 to clamp the box through the adjustable bidirectional screw 33, the buffer pad 11 can form a flexible contact between the clamping plate 35 and the box surface due to the elastic deformation characteristics of the rubber material. On the one hand, it can avoid the metal clamping plate 35 directly squeezing the box, causing surface scratches or indentations. On the other hand, the clamping force is evenly distributed through the buffering effect of the rubber, effectively reducing the risk of deformation of the box due to excessive local force. At the same time, it absorbs cutting vibration during the processing and improves the stability of the box when it is fixed.

[0032] Example 2:

[0033] refer to Figure 3 and Figure 4 As shown, the fixing frame also includes an auxiliary positioning mechanism 5. The auxiliary positioning mechanism 5 includes a double-headed motor 51 fixedly installed in the center of the clamping plate 35. Two adjustment holes 52 are opened on one side of the clamping plate 35. A one-way screw 53 is fixed to the output end of the double-headed motor 51. An adjustment block 54 is threadedly connected to the outer wall of the one-way screw 53. A connecting block 55 is fixed to the bottom of the adjustment block 54. An auxiliary positioning rod 56 is slidably inserted inside the connecting block 55.

[0034] A limiting groove 7 is provided on one side of the inner wall of the adjusting hole 52. A limiting block 8 is slidably installed inside the limiting groove 7. The top of the limiting block 8 is fixedly connected to the bottom of the connecting block 55.

[0035] Guide grooves 9 are provided on both sides of the inner wall of the connecting block 55. Two guide plates 10 are fixed on the outer wall of the auxiliary positioning rod. The guide plates 10 are slidably connected to the inside of the guide grooves 9.

[0036] As shown above, when the dual-head motor 51 starts, it drives the unidirectional lead screw 53 to rotate. The adjusting block 54, which is threadedly connected to the unidirectional lead screw 53, moves along the axis of the lead screw, causing the bottom connecting block 55 to slide up and down in the adjusting hole 52. The connecting block 55 achieves vertical guidance through the cooperation of the limiting block 8 and the limiting groove 7. At the same time, the guide plate 10 on the outer wall of the auxiliary positioning rod 56 slides in the guide groove 9 of the connecting block 55, ensuring that the auxiliary positioning rod 56 extends or retracts in a straight line, thereby pressing against or disengaging from the side of the box. This structure achieves precise extension and retraction adjustment of the auxiliary positioning rod by driving the unidirectional lead screw with a dual-head motor. With the double limiting of the limiting groove and the guide groove, the auxiliary positioning rod can stably press against the box. The adjustable auxiliary positioning rod achieves adaptive positioning for boxes of different specifications, improving the positioning accuracy and applicability of the fixing frame.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixing bracket for machining a planetary gearbox housing, characterized in that, Comprising: A base (1), on the top surface of the base (1) there is a clamping mechanism (3), around the outer periphery of the clamping mechanism (3) there are evenly arranged a plurality of support rods (6), the bottom ends of the plurality of support rods (6) are fixedly arranged on the base (1), and the top ends are jointly fixedly arranged with a top frame (2), the top frame (2) is in the shape of a Chinese character 'Mu', composed of a frame (21) and two cross frames (22), directly below the two cross frames (22) there are arranged pressing plates (23), and the distance between the cross frame (22) and the pressing plate (23) is adjusted through a pressing-down mechanism (4); The clamping mechanism (3) includes a fixed frame (31) fixedly arranged at the center of the top surface of the base (1), on both sides of the top surface of the fixed frame (31) there are symmetrically opened movable grooves, in both of the movable grooves there are rotationally installed distance-adjusting double-headed screws (33), one end of each of the two distance-adjusting double-headed screws (33) penetrates through the fixed frame (31), and through the meshing transmission of the sprockets fixedly connected thereto and an endless chain, they are synchronously rotated, on the side wall of the fixed frame (31) there is fixedly arranged a first power source (32), the output shaft of the first power source (32) is connected to one of the distance-adjusting double-headed screws (33), on the outer wall of the distance-adjusting double-headed screw (33) there are threadedly connected two moving blocks (34) that fit into the movable grooves, and at the top of the two moving blocks (34) located in the same axial direction perpendicular to the axis of the distance-adjusting double-headed screw (33) there is jointly fixed a clamping plate (35).

2. The fixing bracket for machining a planetary reducer housing according to claim 1, characterized in that: It further includes an auxiliary positioning mechanism (5), the auxiliary positioning mechanism (5) includes a double-headed motor (51) fixedly arranged at the center inside the clamping plate (35), on one side of the clamping plate (35) there are opened two adjusting holes (52), the output end of the double-headed motor (51) is fixed with a single-headed screw (53), on the outer wall of the single-headed screw (53) there is threadedly connected an adjusting block (54), the bottom of the adjusting block (54) is fixed with a connecting block (55), and inside the connecting block (55) there is slidably inserted an auxiliary positioning rod (56).

3. The fixing bracket for machining a planetary reducer housing according to claim 1, characterized in that: The pressing-down mechanism includes a moving groove opened on the bottom surface of the cross frame (22), inside the moving groove there is rotationally arranged a displacement double-headed screw (41), on one side of the frame (21) there is an installation groove, inside the installation groove there is a chain transmission component, one end of the displacement double-headed screw (41) penetrates through the cross frame (22) into the installation groove, and at the end through the chain transmission component, it realizes synchronous rotation with the other displacement double-headed screw (41), on the outer side wall of the frame (21) there is fixedly arranged a second power source (43), the output shaft of the second power source (43) penetrates into the installation groove and is connected to one of the displacement double-headed screws (41), on the outer wall of the displacement double-headed screw (41) there are threadedly connected two sliding blocks (42), the two sliding blocks (42) are slidably embedded in the moving groove, the bottom ends thereof are hinged with an upper connecting frame (44), the bottom end of the upper connecting frame (44) is hinged with a lower connecting frame (45), and the bottom end of the lower connecting frame (45) is fixedly arranged on the pressing plate (23).

4. The fixing bracket for machining a planetary reducer housing according to claim 2, characterized in that: A limiting groove (7) is provided on one side of the inner wall of the adjusting hole (52), and a limiting block (8) is slidably installed inside the limiting groove (7). The top of the limiting block (8) is fixedly connected to the bottom of the connecting block (55).

5. A fixing bracket for machining a planetary gearbox housing according to claim 2, characterized in that: The inner walls of the connecting block (55) are respectively provided with guide grooves (9), and the outer walls of the auxiliary positioning rod are fixed with two guide plates (10), which are slidably connected to the guide grooves (9).

6. The fixing bracket for machining a planetary gearbox housing according to claim 1, characterized in that: A buffer pad (11) is fixed to one side of the clamping plate (35), and the buffer pad (11) is made of rubber.

Images