A gear drilling jig

Abstract

The utility model discloses a gear drilling clamp, characterized in that: including clamp base, support plate, clamp base plate, wherein the clamp base plate is set up on the clamp base through the support plate, the middle part of clamp base plate is provided with the vertical positioning shaft of elevating, be provided with the locating block on the clamp base plate, the one side of locating block is provided with the drill jig seat, the drill jig seat upper portion is provided with the drill jig board that extends to the above of locating block horizontally, be provided with the drill bushing on the drill jig board, be provided with the horizontal sliding tooth groove locating block on the drill jig seat, the front end of tooth groove locating block has with the gear tooth groove structure to the adaptation of fixed tooth taper, be provided with the pressure cylinder of pressing the gear upper end face on the clamp base plate. The utility model has the beneficial effects including: the clamp structure is simple, and workpiece clamping is convenient, and the positioning accuracy is high, and the processing error is little, and the gear drilling processing efficiency and product qualification rate have been improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of machining fixtures, specifically to a gear drilling fixture. Background Technology

[0002] High-precision machining of gear locating pin holes is a crucial process for ensuring the proper alignment and assembly of gear sets. The core requirement is to ensure that the center axis of the pin hole strictly coincides with the center line of the gear tooth groove. If the alignment deviation exceeds [a certain value]...

[0003] An error of ±0.05mm will cause gear meshing phase misalignment, leading to abnormal transmission noise, uneven tooth surface wear, or even system failure. Traditional fixtures use the outer diameter or end face of the gear as the positioning reference and achieve indexing drilling by rotating the indexing plate. However, gear tooth groove machining itself has a cumulative pitch error (typically ±0.03-0.05mm). Indexing machining based on the outer diameter cannot compensate for the uneven distribution of tooth grooves, causing the pin hole center to deviate from the theoretical center of the tooth groove.

[0004] Some fixtures require manual visual judgment to align the machining pin holes with the gear tooth grooves. After clamping, the drill bit is prone to shifting, causing slight slippage of the gears, resulting in poor consistency in batch production. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this utility model provides a gear drilling fixture that is easy to clamp, has high positioning accuracy, and high processing efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A gear drilling fixture, characterized in that it comprises a fixture base, a support plate, and a fixture bottom plate, wherein the fixture bottom plate is horizontally mounted on the fixture base via the support plate, a vertically lifting positioning shaft is provided in the middle of the fixture bottom plate, a positioning block is provided on the fixture bottom plate, a drill jig seat is provided on one side of the positioning block, a drill template extending laterally above the positioning block is provided on the upper part of the drill jig seat, a drill sleeve is provided on the drill template, a horizontally sliding tooth groove positioning block is provided on the drill jig seat, the front end of the tooth groove positioning block has a fixed tooth cone adapted to the gear tooth groove structure, and a clamping cylinder for clamping the upper end face of the gear is provided on the fixture bottom plate.

[0008] Furthermore, a lifting cylinder is provided at the bottom of the fixture base plate, and the piston rod of the lifting cylinder is connected to the positioning shaft. The positioning shaft passes through the central hole of the positioning block, and the positioning shaft slides in conjunction with the central hole of the positioning block.

[0009] Furthermore, the upper end of the positioning shaft has a tapered portion.

[0010] Furthermore, an adjustment pad is provided between the positioning block and the fixture base plate.

[0011] Furthermore, there are two clamping cylinders, which are arranged symmetrically on the clamping base plate on the side away from the drill jig.

[0012] Furthermore, the drill jig base has a groove in the middle that is aligned with the direction of the drill template, the toothed positioning block is slidably disposed in the groove, and a handle is provided at the rear end of the toothed positioning block.

[0013] Furthermore, two pre-positioning posts are provided on the top surface of the positioning block near the drill jig base.

[0014] The advantages of this utility model include: simple fixture structure, convenient workpiece clamping, high positioning accuracy, small processing error, and significantly improved gear drilling efficiency and product qualification rate. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural schematic diagram of the present invention;

[0016] Figure 2 This is a top view of the present invention (the drill template is not visible). Detailed Implementation

[0017] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] One such Figure 1-2 The gear drilling fixture shown includes a fixture base 1, a support plate 2, and a fixture bottom plate 3, wherein the fixture bottom plate 3 is horizontally mounted on the fixture base 1 via the support plate 2. A vertically lifting positioning shaft 4 is provided in the middle of the fixture bottom plate 3 for positioning the center hole of the gear to be drilled. A positioning block 5 is provided on the fixture bottom plate 1 for supporting and positioning the end face of the gear to be drilled. A drill jig 6 is provided on one side of the positioning block 5. A drill template 7 extending laterally above the positioning block 5 is provided on the upper part of the drill jig 6. A drill sleeve 8 is provided on the drill template 7. The distance from the center of the drill sleeve 8 to the center hole of the gear determines the radial position of the positioning pin hole on the end face of the gear. A horizontally sliding tooth groove positioning block 9 is provided on the drill jig 6. The front end of the tooth groove positioning block 9 has a fixed tooth cone 91 adapted to the gear tooth groove structure. The tooth groove positioning block 9 is used to position the direction of the gear tooth groove to be drilled, so that its tooth groove axis of symmetry is on the same straight line as the pin hole to be machined. A clamping cylinder 12 is provided on the base plate 3 of the fixture to clamp the upper end face of the gear, so that the gear will not move axially during drilling. Two pre-positioning posts 14 are provided on the top surface of the positioning block 5 near the drill jig base 6.

[0019] like Figure 1As shown, a lifting cylinder 10 is provided at the bottom of the fixture base plate 3. The piston rod of the lifting cylinder 10 is connected to the positioning shaft 4. The positioning shaft 4 passes through the center hole of the positioning block 5 and slides with the center hole of the positioning block 5. The upper end of the positioning shaft 4 has a tapered part, which facilitates upward guidance and insertion into the center hole of the gear to be processed to complete the center positioning.

[0020] To ensure that the positioning surface of the positioning block 5 is at a suitable height, an adjustment pad 11 is provided between the positioning block 5 and the fixture base plate 3 in this embodiment.

[0021] To ensure a good gear clamping effect, this embodiment uses two clamping cylinders 12, which are symmetrically arranged on the clamping base plate 3 on the side away from the drill jig 6. The clamping cylinder 12 is a spinning cylinder, and its clamping force can act on the gear end face simultaneously with the drilling pressure of the drill bit, resulting in a better clamping effect.

[0022] like Figure 1 The drill jig base 6 shown has a groove in the middle that is aligned with the direction of the drill template 7. The toothed positioning block 9 is slidably disposed in the groove, and a handle 13 is provided at the rear end of the toothed positioning block 9.

[0023] In this embodiment, the clamping and positioning process is as follows: the clamping cylinder 12 is in the open state, and the worker first places the gear to be drilled on the positioning block 5. At this time, the lifting cylinder 10 retracts, and the positioning shaft 4 is in the retracted state and completely hidden under the positioning surface of the positioning block 5. First, the gear is brought into contact with the prepositioning post 14, and then the lifting cylinder 10 is raised so that the positioning shaft 4 extends into the center hole of the gear to complete the center positioning. The worker pushes the tooth groove positioning block 9 forward so that its fixed tooth cone 91 is fully inserted into one tooth groove of the gear and ensures good fit. The clamping cylinder 12 is activated to clamp the upper end face of the gear. Finally, the drilling machine is started and the drill bit is guided by the drill sleeve 8 to drill the positioning pin hole on the end face of the gear.

[0024] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A gear drilling fixture, characterized in that: The fixture includes a fixture base (1), a support plate (2), and a fixture bottom plate (3). The fixture bottom plate (3) is horizontally mounted on the fixture base (1) via the support plate (2). A vertically lifting positioning shaft (4) is provided in the middle of the fixture bottom plate (3). A positioning block (5) is provided on the fixture bottom plate (3). A drill jig seat (6) is provided on one side of the positioning block (5). A drill template (7) extending laterally to the top of the positioning block (5) is provided on the upper part of the drill jig seat (6). A drill sleeve (8) is provided on the drill template (7). A horizontally sliding toothed positioning block (9) is provided on the drill jig seat (6). The front end of the toothed positioning block (9) has a fixed tooth cone (91) adapted to the toothed structure of the gear. A clamping cylinder (12) for clamping the upper end face of the gear is provided on the fixture bottom plate (3).

2. The gear drilling fixture according to claim 1, characterized in that: The bottom of the fixture base plate (3) is provided with a lifting cylinder (10). The piston rod of the lifting cylinder (10) is connected to the positioning shaft (4). The positioning shaft (4) passes through the center hole of the positioning block (5), and the positioning shaft (4) slides with the center hole of the positioning block (5).

3. The gear drilling fixture according to claim 1, characterized in that: The upper end of the positioning shaft (4) has a tapered part.

4. A gear drilling fixture according to claim 1, characterized in that: An adjusting pad (11) is provided between the positioning block (5) and the fixture base plate (3).

5. A gear drilling fixture according to claim 1, characterized in that: The number of clamping cylinders (12) is two, and they are arranged symmetrically on the clamping base plate (3) on the side away from the drill jig (6).

6. A gear drilling fixture according to claim 1, characterized in that: The drill jig base (6) has a groove in the middle that is aligned with the direction of the drill template (7), the toothed positioning block (9) is slidably disposed in the groove, and a handle (13) is provided at the rear end of the toothed positioning block (9).

7. A gear drilling fixture according to claim 1, characterized in that: Two pre-positioning posts (14) are provided on the top surface of the positioning block (5) near the drill jig (6).

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