Fixing clamp for machining inner hole of planetary gear

Abstract

The utility model discloses a stationary fixture for machining an inner hole of a planetary gear, which comprises a working base station, a clamping mechanism is arranged on the surface of the upper end of the working base station, a leak hole is formed in the center of the working base station, a gear to be machined is arranged above the leak hole, and a positioning hole is formed in the surface of the upper end of the working base station. According to the fixing clamp for machining the inner hole of the planetary gear, before machining, a measuring bar is plugged into a hole formed in the upper surface of the second retainer, then the gear is placed into a concave part formed in the second retainer, and then the first retainer is placed on the upper surface of the gear and attached to the second retainer; the second retainer body and the first retainer body are tightly connected together through the round head screw and then placed on the surface of the working base table, the pit in the lower end of the second retainer body is clamped with the end face positioning block, and due to the preliminary positioning effect of the end face positioning block, the measuring bar can be rapidly clamped with the positioning hole, so that rapid positioning is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear processing, in particular to a fixing fixture for machining the inner hole of a planetary gear. Background Technique

[0002] As early as 300 BC, Aristotle expounded on the problem of gear transmission of rotational motion. The famous Greek inventor Ktesibios evenly inserted pins on the edge of a circular plate workbench to make it mesh with a pinion. He applied this mechanism to a water clock, which is the initial origin of gears.

[0003] At the end of the 19th century, with the use and popularization of special machine tools and tools for gear cutting, after gear processing had a relatively complete technical foundation, the involute tooth profile gradually showed great advantages. When cutting gears, as long as the gear cutting tool is slightly moved from the normal meshing position, corresponding modified gears can be cut on the machine tool with standard tools.

[0004] However, during the process of machining the inner hole of a gear, the outer circle runout and the tooth circle runout are not concentric, resulting in an out-of-tolerance tooth circle Fr in the machined gear, directly causing the machining accuracy to not be further improved. This is a problem existing in some existing fixtures. Content of the Utility Model

[0005] The purpose of the utility model is to provide a fixing fixture for machining the inner hole of a planetary gear, so as to solve the problem of out-of-tolerance tooth circle Fr caused by the non-concentricity of the outer circle runout and the tooth circle runout mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A clamping mechanism is provided on the upper surface of the working base. A leakage hole is opened at the center of the working base. A gear to be machined is provided above the leakage hole. A positioning hole is provided on the upper surface of the working base.

[0007] Preferably, the clamping mechanism includes: A slide rail is provided inside the working base. A slider is provided inside the slide rail. A hydraulic rod is fixedly installed on one side surface of the slider. A hydraulic clamping chuck is fixedly installed at the upper end of the slider through a first nut. A shockproof pad is fixedly installed on the outer surface of the hydraulic clamping chuck.

[0008] By adopting the above technical solution, the position of the positioning mechanism is fixed by using hydraulic pressure, improving the machining accuracy of the gear. The shockproof pad prevents the tool from scratching due to excessive vibration during gear machining.

[0009] Preferably, a positioning mechanism is provided at the upper end of the positioning hole. The positioning mechanism includes: an end face positioning block is provided on the upper surface of the working base; a measuring rod is slidably arranged in the hole of the positioning hole; a cage two is provided at the upper end of the measuring rod; a cage one is provided on the upper surface of the cage two; and the cage one and the cage two are connected by a round head screw.

[0010] With the above technical solution, the end face positioning block realizes preliminary and rapid positioning, and the measuring rod and the positioning hole are for secondary positioning, thus realizing rapid and accurate positioning as a whole and indirectly improving the working efficiency.

[0011] Preferably, the aperture of the leakage hole is larger than the inner hole aperture of the gear to be machined.

[0012] With the above technical solution, it is convenient for the waste chips generated during machining to be discharged from the leakage hole, avoiding the influence of waste chips on the next machining.

[0013] Preferably, the slide rail and the slider are slidably connected, and a threaded hole is provided on the upper surface of the slider. An opening is provided at the upper end of the slide rail, and the distance between the openings of the slide rail is smaller than the maximum distance between the two ends of the slider. The maximum distance between the two ends of the hydraulic clamping chuck is greater than the distance between the openings of the slide rail. The bottom diameter of the nut one is smaller than the distance between the openings of the slide rail. The shape of the side surface contour of the hydraulic clamping chuck is the same as the shape of the outer surface of one side of the cage two. One side surface of the shockproof pad is wavy.

[0014] With the above technical solution, the nut one plays a role in connecting the hydraulic clamping chuck and the slider, and ensures that the hydraulic clamping chuck and the slider move along the openings of the slide rail. The wavy shockproof pad ensures the stability of the hydraulic clamping chuck during clamping.

[0015] Preferably, a depression with the same shape as the end face positioning block is provided on the lower surface of the cage two. A hole for the measuring rod to pass through is provided on the upper surface of the cage two. A threaded hole is provided on the upper surface of the cage two. Depressions that fit the outer contour of the gear are provided inside both the cage two and the cage one.

[0016] With the above technical solution, the position of the gear is quickly fixed by the engagement of the cage two, the cage one and the gear, and a structural basis for rapid positioning is provided.

[0017] Compared with the prior art, the beneficial effects of the present utility model are: the fixed fixture for machining the inner hole of the planetary gear:

[0018] 1. Before processing, first insert the gauge rod into the hole on the upper surface of the second cage. Then place the gear into the recess provided in the second cage. Subsequently, place the first cage on the upper surface of the gear and fit it with the second cage. Use round head screws to tightly connect the second cage and the first cage together. Then place them on the surface of the working base, and make the recess at the lower end of the second cage engage with the end face positioning block. Due to the preliminary positioning function of the end face positioning block, the gauge rod can be quickly engaged with the positioning hole, thus achieving rapid positioning;

[0019] 2. After positioning is completed, start the hydraulic system to drive the hydraulic rod to move. The hydraulic rod drives the slider to move on the slide rail, causing the hydraulic clamping chuck to move, thereby tightly fixing the second cage and the first cage, ensuring the stability of the gear during processing, avoiding the out-of-roundness of the outer circle and the non-concentricity of the tooth ring runout, resulting in the out-of-tolerance of the processed tooth ring Fr, and improving the machining accuracy of the gear. Brief Description of the Drawings

[0020] Figure 1 It is a schematic top view structure diagram of the whole utility model;

[0021] Figure 2 It is a schematic top view connection structure diagram of the working base and the end face positioning block of the utility model;

[0022] Figure 3 It is a schematic front sectional view connection structure diagram of the first cage and the second cage of the utility model;

[0023] Figure 4 It is a schematic bottom view structure diagram of the second cage of the utility model;

[0024] Figure 5 It is a schematic top view structure diagram of the first cage of the utility model

[0025] Figure 6 It is a schematic front sectional view connection structure diagram of the slide rail and the slider of the utility model.

[0026] In the figure: 1, working base; 2, slide rail; 3, hydraulic clamping chuck; 4, nut one; 5, shock pad; 6, first cage; 7, second cage; 8, round head screw; 9, gauge rod; 10, gear; 11, end face positioning block; 12, leakage hole; 13, slider; 14, hydraulic rod; 15, positioning hole. Detailed Embodiment

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figure 1-6 , the present utility model provides a technical solution: a fixing fixture for machining the inner hole of a planetary gear.

[0029] Embodiment 1

[0030] Disclosed in this embodiment: It includes a working base 1. A clamping mechanism is provided on the upper surface of the working base 1. A leakage hole 12 is opened at the center of the working base 1. A gear 10 to be machined is provided above the leakage hole 12. A positioning hole 15 is provided on the upper surface of the working base 1. The clamping mechanism includes: A slide rail 2 is provided inside the working base 1. A slider 13 is provided inside the slide rail 2. A hydraulic rod 14 is fixedly installed on one side surface of the slider 13. A hydraulic clamping chuck 3 is fixedly installed on the upper end of the slider 13 through a first nut 4. A shockproof pad 5 is fixedly installed on the outer surface of the hydraulic clamping chuck 3. The slide rail 2 and the slider 13 are slidably connected. And a threaded hole is provided on the upper surface of the slider 13. An opening is provided at the upper end of the slide rail 2. And the distance between the openings of the slide rail 2 is smaller than the maximum distance between the two ends of the slider 13. The maximum distance between the two ends of the hydraulic clamping chuck 3 is greater than the distance between the openings of the slide rail 2. The bottom diameter of the first nut 4 is smaller than the distance between the openings of the slide rail 2. The shape of one side surface contour of the hydraulic clamping chuck 3 is the same as the shape of the outer surface of one side of the cage two 7. One side surface of the shockproof pad 5 is wavy.

[0031] After positioning is completed, start the hydraulic system to drive the hydraulic rod 14 to move. The hydraulic rod 14 drives the slider 13 to move on the slide rail 2, so that the hydraulic clamping chuck 3 fixed on the slider 13 through the first nut 4 moves, thereby tightly fixing the cage two 7 and the cage one 6, ensuring the stability of the gear 10 during machining. The shockproof pad 5 prevents the tool from scratching due to excessive vibration when machining the gear 10. The waste chips generated during machining are discharged from the leakage hole 12.

[0032] Embodiment 2

[0033] This example is disclosed on the basis of Embodiment 1:

[0034] A positioning mechanism is provided at the upper end of the positioning hole 15. The positioning mechanism includes: an end face positioning block 11 is provided on the upper surface of the working base 1. A measuring rod 9 is slidably arranged in the hole of the positioning hole 15. A cage two 7 is provided at the upper end of the measuring rod 9. A cage one 6 is provided on the upper surface of the cage two 7. The cage one 6 and the cage two 7 are connected by a round head screw 8. A depression having the same shape as the end face positioning block 11 is provided on the lower surface of the cage two 7. A hole for the measuring rod 9 to pass through is provided on the upper surface of the cage two 7. A threaded hole is provided on the upper surface of the cage two 7. Depressions that fit the outer contour of the gear 10 are provided inside both the cage two 7 and the cage one 6.

[0035] Before machining, first insert the measuring rod 9 into the hole provided on the upper surface of the cage two 7. Then place the gear 10 into the depression provided in the cage two 7. Subsequently, place the cage one 6 on the upper surface of the gear 10 and fit it with the cage two 7. Use the round head screw 8 to tightly connect the cage two 7 and the cage one 6 together. Then place it on the surface of the working base 1 and make the depression at the lower end of the cage two 7 engage with the end face positioning block 11. Due to the preliminary positioning effect of the end face positioning block 11, the measuring rod 9 can be quickly engaged with the positioning hole 15, thus achieving rapid positioning.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixed fixture for machining the inner hole of a planetary gear type, comprising: Working base table (1), characterized in that: a clamping mechanism is provided on the upper surface of the working base table (1), a leakage hole (12) is opened at the center of the working base table (1), a gear to be processed (10) is provided above the leakage hole (12), and a positioning hole (15) is provided on the upper surface of the working base table (1).

2. The fixed fixture for machining the inner hole of a planetary gear according to claim 1, characterized in that: The clamping mechanism includes: a slide rail (2) is provided inside the working base table (1), a slider (13) is provided inside the slide rail (2), a hydraulic rod (14) is fixedly installed on one side surface of the slider (13), a hydraulic clamping chuck (3) is fixedly installed at the upper end of the slider (13) through a first nut (4), and a shockproof pad (5) is fixedly installed on the outer surface of the hydraulic clamping chuck (3).

3. A fixed fixture for machining the inner hole of a planetary gear as claimed in claim 1, characterized in that: A positioning mechanism is provided above the positioning hole (15). The positioning mechanism includes: an end face positioning block (11) is provided on the upper surface of the working base table (1), a measuring rod (9) is slidably arranged in the hole of the positioning hole (15), a second cage (7) is provided at the upper end of the measuring rod (9), a first cage (6) is provided on the upper surface of the second cage (7), and the first cage (6) and the second cage (7) are connected by a round head screw (8).

4. A fixing jig for machining the inner hole of a planetary gear according to claim 1, characterized in that: The aperture of the leakage hole (12) is larger than the aperture of the inner hole to be processed of the gear (10).

5. A fixing jig for machining the inner hole of a planetary gear according to claim 2, characterized in that: The slide rail (2) is slidably connected to the slider (13), and a threaded hole is provided on the upper surface of the slider (13). An opening is provided at the upper end of the slide rail (2), and the distance between the openings of the slide rail (2) is smaller than the maximum distance between the two ends of the slider (13). The maximum distance between the two ends of the hydraulic clamping chuck (3) is larger than the distance between the openings of the slide rail (2). The bottom diameter of the first nut (4) is smaller than the distance between the openings of the slide rail (2). The shape of the one side surface contour of the hydraulic clamping chuck (3) is the same as the shape of the one side outer surface of the second cage (7). One side surface of the shockproof pad (5) is wavy.

6. A fixing fixture for machining the inner hole of a planetary gear as claimed in claim 3, characterized in that: A depression having the same shape as the end face positioning block (11) is provided on the lower surface of the second cage (7). A hole for the measuring rod (9) to pass through is provided on the upper surface of the second cage (7). A threaded hole is provided on the upper surface of the second cage (7). Depressions that fit the outer contour of the gear (10) are provided inside both the first cage (6) and the second cage (7).

Images