A gear backlash tester for differential axle gears and planetary gears

Abstract

The invention discloses a gear tooth backlash gauge for a differential half-axle gear and a planetary gear, comprising a gauge seat, a digital display gauge, the digital display gauge is plugged on the top of the gauge seat, and the probe of the digital display gauge extends inwardly to the inside of the gauge seat; a half-axle gear fixing rod, the half-axle gear fixing rod is slidably connected to the inside of the gauge seat, and the top of the half-axle gear fixing rod abuts against the probe; wherein, a boss adapted to the half-axle gear is provided at the bottom of the half-axle gear fixing rod; at least one notch is provided at the bottom of the half-axle gear fixing rod; the half-axle gear fixing rod is in the shape of a driving block with an integral top and a non-interfering bottom; at least one of the driving blocks is provided with a bolt hole and connected with a tightening bolt; a notch adapted to the tightening bolt is provided at the bottom of the gauge seat. Through the coordinated use of the positionable gauge seat and the half-axle gear fixing rod in the gauge seat, the measurement is accurate, the structure is simple, the service life is long, and the cost is low.

Description

Technical Field

[0001] The invention relates to a measuring tool, in particular to a gear tooth backlash measuring tool for a differential half-axle gear and a planetary gear. Background Art

[0002] In the front and rear axles of all-terrain four-wheel drive vehicles, one of the assembly requirements for the half-shaft gears and planetary gears is the gear tooth backlash requirement after assembly; in this context, a gauge is needed.

[0003] The inspection fixtures in the prior art have inaccurate inspection data and are inconvenient to operate.

[0004] For example, a "cross-axle differential half-axle gear clearance gauge" disclosed in Chinese patent documents has a publication number of CN207379414U. The patent discloses a cross-axle differential half-axle gear clearance gauge, including a gauge body and a dial indicator, and its characteristics are: the upper end of the gauge body is connected to the gauge seat by interference fit, and the dial indicator is fixed to the gauge seat by screws; the lower end of the gauge body is provided with a journal, and the journal is provided with 4-6 circumferentially evenly distributed notches; the end of the gauge body is provided with an inner tapered hole; the middle of the gauge body is threadedly connected to a clamping rod, the upper end of the clamping rod is pressed into a handle, and a tapered sleeve is fixedly installed on the lower end, and the tapered sleeve is inserted into the inner tapered hole at the end of the gauge body; a positioning shoulder is provided on the upper part of the journal to contact with the half-axle gear. In this patent, when the tapered sleeve is lifted by the clamping rod, the inner tapered hole expands outward and the shaft neck also becomes tapered. Under the action of the tapered sleeve, the clamped gear will slide up, thus affecting the measurement quality; at the same time, when the shaft neck is extended downward, there is no positioning, which is not conducive to measurement, and it is easy to cause damage to internal parts, which is not conducive to the use of the product; the setting of the shaft neck is prone to irreversible deformation, which is not conducive to extension during detection, nor is it conducive to removal, and it will fit too tightly with the inner wall of the gear. Summary of the invention

[0005] In order to solve the above problems in the prior art, the present invention provides a positioning meter base and a half-shaft gear fixing rod in the meter base, which can achieve accurate measurement, simple structure, long service life and low cost.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] A gear tooth backlash gauge for a differential axle gear and a planetary gear, comprising a gauge seat; a positioning end face for positioning with a differential case is provided at the bottom of the gauge seat; a digital display is provided on the gauge seat, the digital display is plugged into the top of the gauge seat, and a probe of the digital display extends inwardly into the interior of the gauge seat; a half-axle gear fixing rod, the half-axle gear fixing rod is slidably connected to the interior of the gauge seat, and the top of the half-axle gear fixing rod abuts against the probe; wherein a boss is provided at the bottom of the half-axle gear fixing rod and is matched with the half-axle gear; at least one notch is provided at the bottom of the half-axle gear fixing rod; the half-axle gear fixing rod is in the shape of a driving block with an integral top and a non-interfering bottom; at least one of the driving blocks is provided with a bolt hole and is connected with a tension bolt; a notch is provided at the bottom of the gauge seat and is matched with the tension bolt. A positioning end face is provided at the bottom of the meter base to ensure that the gauge is placed in place without causing damage to the internal parts, thus ensuring the quality of the product and the accuracy of the measured data. The digital display on the meter base is stable and will not produce data errors; the half-axle gear fixing rod is slidably connected to the inside of the meter base, and the suitable half-axle gear fixing rod can be replaced according to the size of the differential being measured, which is flexible and versatile; the expansion bolt drives the drive block, which is tightly matched with the gear for easy measurement and operation.

[0008] Furthermore, a meter jacket is screwed on the top of the meter base, and the digital display meter is fixed on the meter jacket through a meter chuck. It is easy to disassemble and replace, and the stable structure ensures the accuracy of the measurement data.

[0009] Furthermore, there is one notch and one driving block with a bolt hole, so the device can be operated with one hand and is easy to operate.

[0010] Furthermore, there is one notch and two drive blocks with bolt holes, which are symmetrically arranged on both sides, so that the fit is more reliable and the balance of the gear is ensured, and there will be no tilt to cause measurement errors.

[0011] Furthermore, the notch is located on the axis of the half-axle gear fixing rod, and the symmetrical arrangement ensures the balance of the gear, and does not cause measurement errors due to tilt.

[0012] Furthermore, the digital display, the meter base and the half-axle gear fixing rod are located on the same axis, so there will be no unbalanced state, which will cause the gear to tilt and thus cause inaccuracy in the measurement data.

[0013] Compared with the prior art, the invention has the advantages of accurate measurement, simple structure, long service life, low cost and flexible use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the use state of the present invention.

[0016] Figure 3 It is a three-dimensional cross-sectional view of the present invention.

[0017] Figure 4 for Figure 3 A is an enlarged view of the figure.

[0018] Figure 5 A schematic diagram of an embodiment of the present invention.

[0019] In the figure:

[0020] 1. Meter base; 2. Positioning end face; 3. Digital display; 4. Axle gear fixing rod; 5. Probe; 6. Boss; 7. Notch; 8. Drive block; 9. Expansion bolt; 10. Notch; 11. Meter sleeve; 12. Meter chuck; 13. Differential assembly; 14. Axle gear; 15. Differential housing. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1-4 The present invention is an embodiment of a gear backlash gauge for a differential axle gear and a planetary gear. In the embodiment, the gauge comprises a base 1. A positioning end face 2 for positioning with a differential housing 15 is provided at the bottom of the base 1, which can ensure that the gauge is placed in place without causing damage to internal parts, thereby ensuring the quality of the product and the accuracy of the measurement data. The digital display 3 arranged on the base 1 is in a stable position and will not generate data errors. The digital display 3 is plugged into the top of the base 1, and a probe 5 of the digital display 3 extends inwardly to the inside of the base 1. A half-axle gear fixing rod 4 is also provided on the base 1. The half-axle gear fixing rod 4 is slidably connected to the inside of the base 1, and its top abuts against the probe 5. The gauge can be adjusted according to the size of the differential to be measured. , replace the suitable half-axle gear fixing rod 4, which is flexible and versatile; wherein, the half-axle gear fixing rod 4 is provided with a boss 6 matched with the half-axle gear 14, which ensures the stable fixation of the half-axle gear 14, and the diameter of the boss 6 is smaller than the main part of the half-axle gear fixing rod 4, and when the part is inserted into the interior for measurement, no damage is caused to the interior of the part; in this embodiment, a notch 7 is provided at the bottom of the half-axle gear fixing rod 4, and the two driving blocks 8 formed are both provided with tensioning bolts 9. In other embodiments, two notches 7 can also be provided to form four driving blocks 8, and a notch 10 matched with the above-mentioned tensioning bolt 9 is also provided at the bottom of the table base 1. The tensioning bolt 9 drives the driving block 8 to closely match the half-axle gear 14, which is convenient for measurement and operation. When in use, place the differential assembly 13 to be inspected on the workbench, with the opening of the side gear 14 to be inspected facing upward; extend the inspection fixture into the hole corresponding to the side gear 14 in the differential assembly 13, and let the positioning end face 2 at the bottom of the meter base 1 fall on the differential case 15. During the first inspection, check whether the upper end face of the side gear fixing rod 4 is in contact with the probe 5; tighten the two tension bolts 9, and use the notch 7, the drive block 8 and the boss 6 to lock the side gear 14; clear the digital display 3, press the meter base 1 by hand, lift the tension bolt 9, and drive the side gear fixing rod 4 to rise; when the back of the gear of the side gear 14 contacts the differential case 15, stop moving upward; read the data.

[0026] See also Figure 1-5This is an embodiment of a gear side clearance gauge for a differential half-axle gear and a planetary gear of the present invention. In this embodiment, the basic part is consistent with the above-mentioned embodiment and will not be described in detail here. In this embodiment, a gauge sleeve 11 is screwed on the top of the gauge base 1; the digital display 3 is fixed to the gauge sleeve 11 by a gauge chuck 12, which is easy to disassemble and replace, and the stable structure ensures the accuracy of the measurement data; there is one notch 7 and one drive block 8 with a bolt hole, which can be operated with one hand and is easy to operate; at the same time, the notch 7 is located on the axis of the half-axle gear fixing rod 4, and the digital display 3, the gauge base 1 and the half-axle gear fixing rod 4 are located on the same axis and are symmetrically arranged, which ensures the balance of the locked half-axle gear 14 and will not tilt to cause measurement errors. The method of use is consistent with the above-mentioned embodiment and will not be described in detail here.

[0027] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A gear backlash gauge for a differential axle gear and a planetary gear, comprising a gauge seat; characterized in that: The bottom of the meter base is provided with a positioning end surface for positioning with the differential housing; A digital display meter, the digital display meter is plugged on the top of the meter base, and the probe of the digital display meter extends inwardly into the inside of the meter base; A half-axle gear fixing rod, wherein the half-axle gear fixing rod is slidably connected to the inside of the meter base, and the top of the half-axle gear fixing rod abuts against the measuring head; Among them, a boss adapted to the half-shaft gear is provided at the bottom of the half-shaft gear fixing rod; at least one slot is provided at the bottom of the half-shaft gear fixing rod; the half-shaft gear fixing rod is integrated at the top and has driving blocks at the bottom that do not interfere with each other; at least one of the driving blocks is provided with a bolt hole and is connected with a tightening bolt; a notch adapted to the tightening bolt is provided at the bottom of the table base.

2. The side clearance gauge according to claim 1, characterized in that: A meter clamp sleeve is screwed on the top of the meter seat; the digital display meter is fixed on the meter clamp sleeve through a meter clamp.

3. The side clearance gauge according to claim 1 or 2, characterized in that: There is one notch and one driving block with a bolt hole.

4. The side clearance gauge according to claim 1 or 2, characterized in that: There is one notch and two driving blocks with bolt holes.

5. The side clearance gauge according to claim 1 or 2, characterized in that: The notch is located on the axis of the side gear fixing rod.

6. The side clearance gauge according to claim 3, characterized in that: The notch is located on the axis of the side gear fixing rod.

7. The side clearance gauge according to claim 4, characterized in that: The notch is located on the axis of the side gear fixing rod.

8. The side clearance gauge according to claim 1 or 2, characterized in that: The digital display, the meter base and the half-axle gear fixing rod are located on the same axis.

9. The side clearance gauge according to claim 3, characterized in that: The digital display, the meter base and the half-axle gear fixing rod are located on the same axis.

10. The side clearance gauge according to claim 4, characterized in that: The digital display, the meter base and the half-axle gear fixing rod are located on the same axis.

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