Flatness detection tool for gearbox shell

Abstract

The utility model relates to the technical field of gearbox shell detection, in particular to a gearbox shell flatness detection tool, which comprises a workbench, a first outer sleeve, a first inner rod, a rubber plate and a compression spring, one end of the first inner rod is vertically and slidably arranged on the inner side of the first outer sleeve, and the other end of the first inner rod is detachably connected with the rubber plate. The rubber plate is used for supporting the gearbox shell; the compression spring is arranged on the outer side of the first outer sleeve in a sleeving mode and used for buffering the force generated when the first inner rod moves downwards. According to the flatness detection tool for the gearbox shell, the first outer sleeve, the first inner rod, the rubber plate and the compression spring are arranged, so that a buffer structure can be conveniently formed at the top of the workbench and is used for buffering the force when the gearbox shell is placed; the contact force between the bottom end face of the gearbox shell and the top face of the workbench is small, collision is not prone to occurring, and protection of the planeness of the bottom end face of the gearbox shell is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox housing detection technical field especially relates to a flatness detection frock of gearbox housing. BACKGROUND

[0002] The flatness of the shaft hole end face on the gearbox housing is a very important quality index, which directly affects the assembly accuracy and the overall performance of the transmission system. If the flatness of the shaft hole end face is not good, it may cause the oil seal or gasket to be unable to tightly fit, thereby causing oil leakage or other forms of leakage. Therefore, after the shaft hole end face of the gearbox housing is milled, the flatness of the shaft end face needs to be detected with the aid of a detection frock.

[0003] Publication (announcement) No. CN210346579U discloses a flatness detection device for gearbox housing, which belongs to the technical field of gearbox housing detection. It comprises a workbench and a dial gauge. The flatness detection device can effectively position the gearbox housing to prevent it from shaking and yawing, thereby facilitating multi-point measurement by the dial gauge.

[0004] When the above technical solution is used to detect the flatness of the shaft hole end face of the gearbox housing, the gearbox housing needs to be placed flat on the workbench, and then the dial gauge is used to detect the shaft hole at the top of the housing. However, during the placement of the gearbox housing, the force when the end face at the bottom of the gearbox housing contacts the top surface of the workbench is relatively large, which can easily damage the flatness of the end face at the bottom of the gearbox housing. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a flatness detection frock for gearbox housing, which is provided with a first outer sleeve, a first inner rod, a rubber plate and a compression spring. The buffer structure is formed on the top of the workbench to buffer the force when the gearbox housing is placed, so that the force when the end face at the bottom of the gearbox housing contacts the top surface of the workbench is relatively small, and it is not easy to cause bumps, which is beneficial to the protection of the flatness of the end face at the bottom of the gearbox housing.

[0006] The technical solution of the utility model is implemented as follows:

[0007] The utility model provides a flatness detection frock for gearbox housing, which comprises a workbench and a first outer sleeve, a first inner rod, a rubber plate and a compression spring.

[0008] One end of the first outer sleeve is fixed to the top of the workbench, and the other end extends upward;

[0009] One end of the first inner rod is vertically slidably arranged on the inner side of the first outer sleeve, and the other end is detachably connected to the rubber plate. The top of the rubber plate is used to support the gearbox housing.

[0010] The compression spring is sleeved outside the first outer sleeve tube, one end of the compression spring abuts against the top of the workbench, and the other end abuts against the bottom of the rubber plate, and the compression spring is used for buffering the force when the first inner rod moves downward.

[0011] On the basis of the above technical scheme, preferably, the first inner rod is detachably connected with the first outer sleeve tube, and the length of the compression spring is greater than the length of the first outer sleeve tube.

[0012] On the basis of the above technical scheme, preferably, a first threaded hole is vertically and throughly arranged on the rubber plate, and the upper end of the first inner rod is screwed in the first threaded hole.

[0013] On the basis of the above technical scheme, preferably, a first unloading buckle groove is arranged on the top end of the first inner rod.

[0014] On the basis of the above technical scheme, preferably, the table further comprises a second outer sleeve tube and a second inner rod, wherein,

[0015] The second outer sleeve tube is parallel to the first outer sleeve tube, and a plurality of second outer sleeve tubes are arranged in a circumferential annular array along the first outer sleeve tube, and one second inner rod is slidably arranged in each second outer sleeve tube, and the upper end of the second inner rod is detachably arranged on the rubber plate.

[0016] The lower end of the second outer sleeve tube is fixed on the top of the workbench, and the top end of the second outer sleeve tube is horizontally aligned with the top end of the first outer sleeve tube.

[0017] On the basis of the above technical scheme, preferably, the second inner rod is detachably connected with the second outer sleeve tube, the length of the second inner rod is equal to the length of the first inner rod, and the top end of the second inner rod is provided with a second unloading buckle groove.

[0018] On the basis of the above technical scheme, preferably, a second threaded hole is vertically and throughly arranged on the rubber plate and corresponds to the position of the second inner rod, wherein,

[0019] The upper end of the second inner rod is screwed in the corresponding second threaded hole.

[0020] On the basis of the above technical scheme, preferably, the table further comprises a clamp, wherein,

[0021] A plurality of clamps are detachably arranged on the top of the workbench.

[0022] On the basis of the above technical scheme, preferably, the table further comprises a meter placing table, wherein,

[0023] The table placing table is detachably arranged on the top of the workbench.

[0024] The top surface of the table placing table is parallel to the top surface of the workbench.

[0025] On the basis of the above technical scheme, preferably, a plurality of deslagging holes are arranged vertically through the workbench.

[0026] The planeness detection tool for the gearbox shell of the utility model has the following advantages over the prior art

[0027] Advantages:

[0028] (1) By setting the first outer sleeve, the first inner rod, the rubber plate and the compression spring, a buffering structure is formed on the top of the workbench, which is used to buffer the force when the gearbox shell is placed, so that the force when the end surface of the bottom of the gearbox shell contacts the top surface of the workbench is smaller, and it is not easy to knock, which is beneficial to the protection of the planeness of the bottom end surface of the gearbox shell.

[0029] (2) By setting the detachable connection between the first inner rod and the first outer sleeve, the length of the compression spring is greater than the length of the first outer sleeve, and the upper end of the first inner rod is screwed in the first threaded hole, which facilitates the disassembly of the first inner rod, so as to facilitate the installation of the first inner rod with different lengths on the first outer sleeve to change the supporting height of the rubber plate and adapt to the detection of gearbox shells with different heights.

[0030] (3) By setting the second inner rod and the second outer sleeve to guide the rubber plate, the stability of the rubber plate is better when it is lowered, and it is not easy to be tilted.

[0031] (4) By detachably arranging a plurality of clamps on the top of the workbench, the gearbox shell can be clamped and fixed, and the precision during detection is improved.

[0032] (5) By setting the detachable connection between the table placing table and the workbench, and the detachable connection between the clamp and the workbench, different height clamps and table placing tables can be replaced, and the use position of the clamp and the table placing table can be changed to adapt to the detection of gearbox shells with different sizes.

[0033] (6) By setting a plurality of inner threaded holes for installing the clamp and the table placing table at different positions of the workbench, the use position of the clamp and the table placing table can be changed to adapt to the detection of gearbox shells with different sizes. BRIEF DESCRIPTION OF DRAWINGS

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a perspective view of a flatness testing fixture for a gearbox housing according to the present invention.

[0036] Figure 2 This is a top view of a flatness testing fixture for a gearbox housing according to the present invention;

[0037] Figure 3 This is a side view of a flatness testing fixture for a gearbox housing according to the present invention.

[0038] Figure 4 This is a sectional view of the present invention along line AA;

[0039] In the diagram: 1. Workbench; 2. First outer sleeve; 3. First inner rod; 4. Rubber plate; 5. Compression spring; 6. Second outer sleeve; 7. Second inner rod; 8. Fixture; 9. Fixture placement platform; 101. Slag discharge hole; 301. First shackle groove; 401. First threaded hole; 402. Second threaded hole; 701. Second shackle groove. Detailed Implementation

[0040] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] like Figures 1-4 As shown, the present invention provides a flatness testing fixture for a gearbox housing, comprising a worktable 1, a first outer sleeve 2, a first inner rod 3, a rubber plate 4, and a compression spring 5.

[0042] The workbench 1 is a rectangular plate that is fixed to the testing platform by bolts. The top surface of the workbench 1 is hardened to increase its hardness and prevent bumps and scratches. The hardening method is one of carburizing, electroplating, or sandblasting.

[0043] One end of the first outer sleeve 2 is fixed on the top of the workbench 1 through a flange, and the other end extends upward, which is made of hard alloy and has a smooth inner hole surface; one end of the first inner rod 3 is vertically and slidably arranged on the inner side of the first outer sleeve 2, and the other end is connected to the rubber plate 4, the top of the rubber plate 4 is used to support the gearbox housing; the compression spring 5 is sleeved on the outer side of the first outer sleeve 2, one end of the compression spring 5 abuts against the top of the workbench 1, specifically the top surface of the flange at the lower end of the first outer sleeve 2, and the other end abuts against the bottom of the rubber plate 4, which is used to buffer the force when the first inner rod 3 moves downward, in order to prevent the bottom surface of the rubber plate 4 from being damaged, a circular metal plate is fixedly attached to the bottom surface of the rubber plate 4, and the top end of the compression spring 5 abuts against the bottom surface of the circular metal plate.

[0044] The gearbox housing is a box-shaped structure with an open lower end, and an axial hole is vertically and throughly arranged on the top thereof, the top end of the axial hole protrudes upward from the top of the gearbox housing, and the gearbox housing is not shown in the drawing, when the rubber plate 4 is placed on the top of the rubber plate 4, the rubber plate 4 is pressed downward by the gearbox housing, at this time, the rubber plate 4 slowly descends under the action of the compression spring 5, buffering is realized, and the end surface at the bottom of the gearbox housing can be slowly placed on the top surface of the workbench 1, which is not easy to knock against each other, which is beneficial to the protection of the end surface, at the same time, the gearbox housing is generally made of metal, therefore, the hardness of the rubber plate 4 is less than that of the gearbox housing, and the rubber plate 4 is not easy to cause damage to the gearbox housing during the placement of the gearbox housing.

[0045] In order to ensure that the rubber plate 4 has an effective buffering distance, as shown in Figure 4 the length of the compression spring 5 is greater than the length of the first outer sleeve 2, when the rubber plate 4 is under load, the rubber plate 4 drives the first inner rod 3 to slide downward, the compression spring 5 is compressed, and the force of the compression spring 5 is used to buffer the force of the downward sliding of the first inner rod 3.

[0046] Due to the difference in size of different gearbox models, in order to adapt to the detection of gearbox housings of different models, the lower end of the first inner rod 3 is detachably connected to the first outer sleeve 2, and the upper end is detachably connected to the rubber plate 4, by detaching, different lengths of the first inner rod 3 can be replaced, and correspondingly, when the first inner rod 3 is replaced, a compression spring 5 with an appropriate length is replaced, by installing the first inner rod 3 with different lengths to change the support height of the rubber plate 4, the detection of gearbox housings with different heights is adapted.

[0047] In the above detachable structure, as shown in Figure 4As shown, a first threaded hole 401 is vertically through the rubber plate 4, and the first threaded hole 401 is concentric with the annular metal plate. The upper end of the first inner rod 3 is screwed into the first threaded hole 401. At the same time, a first shackle groove 301 is provided on the top end of the first inner rod 3. When disassembling the first inner rod 3, the lower end of the first inner rod 3 is pulled out from the first outer sleeve 2, and then the first inner rod 3 is screwed to remove it from the first threaded hole 401. In this embodiment, multiple first inner rods 3 are prefabricated, and the multiple first inner rods 3 are of different lengths. The length of one of the first inner rods 3 is adapted to a certain type of gearbox housing. Figure 4 The image shows one of the lengths of the first inner rod 3.

[0048] To enhance the connection strength between the first inner rod 3 and the rubber plate 4, the first threaded hole 401 is obtained by using a metal internal threaded sleeve. The internal threaded sleeve and the rubber plate 4 are combined using a rubber-coating molding process. After the combination, the internal threaded sleeve is located in the middle of the rubber plate 4. The inner hole of the internal threaded sleeve is the first threaded hole 401. When installing the first inner rod 3, the upper end of the first inner rod 3 is screwed onto the inner side of the internal threaded sleeve.

[0049] like Figure 1 As shown, the flatness inspection fixture for the gearbox housing also includes a second outer sleeve 6 and a second inner rod 7. The second outer sleeve 6 is parallel to the first outer sleeve 2, and several second outer sleeves 6 are arranged in a circumferential ring around the first outer sleeve 2. A second inner rod 7 is slidably disposed in each second outer sleeve 6, and the upper end of the second inner rod 7 is disposed on the rubber plate 4. The lower end of the second outer sleeve 6 is fixed to the top of the worktable 1, and the top end of the second outer sleeve 6 is horizontally aligned with the top end of the first outer sleeve 2. When the rubber plate 4 descends, the second inner rod 7 slides along the second outer sleeve 6 to guide it and effectively prevent the rubber plate 4 from tilting.

[0050] In the above structure, such as Figure 4 As shown, the second inner rod 7 is detachably connected to the second outer sleeve 6, and the second inner rod 7 is detachably connected to the rubber plate 4. Specifically, the lower end of the second outer sleeve 6 is fixed to the top of the workbench 1 by a flange. A second threaded hole 402 is provided vertically through the rubber plate 4 at the position corresponding to the second inner rod 7. The upper end of the second inner rod 7 is screwed into the corresponding second threaded hole 402. At the same time, the length of the second inner rod 7 is equal to the length of the first inner rod 3. A second shackle groove 701 is provided at the top of the second inner rod 7. That is, for the same product, the length of the second inner rod 7 is equal to the length of the first inner rod 3, and the length of the second outer sleeve 6 is equal to the length of the first outer sleeve 2.

[0051] The structure design of the second threaded hole 402 is the same as that of the first threaded hole 401, and the process of glue encapsulation is adopted to improve the connection strength between the second inner rod 7 and the rubber plate 4, that is, a metal inner threaded sleeve with a suitable hole diameter is embedded in the rubber plate 4, the inner hole of the inner threaded sleeve is the second threaded hole 402, and when the second inner rod 7 is installed, the upper end of the second inner rod 7 is screwed in the metal inner threaded sleeve.

[0052] When the rubber plate 4 is disassembled, the rubber plate 4 is moved upward, the second inner rod 7 is separated from the second outer sleeve 6, and the first inner rod 3 is separated from the first outer sleeve 2. After being separated, the second inner rod 7 is disassembled from the rubber plate 4 by screwing.

[0053] Due to many uncontrollable factors in the workshop, the transmission case placed on the tooling is prone to displacement when the detection platform vibrates under the action of external force (such as platform vibration caused by vehicles passing near the detection platform). In this case, the lower end surface of the transmission case is prone to damage due to mutual friction with the top surface of the workbench 1. To avoid this situation, the flatness detection tooling of the transmission case further comprises clamps 8, wherein a plurality of clamps 8 are detachably arranged on the top of the workbench 1. The clamps 8 are used to clamp and fix the placed transmission case to prevent displacement and improve detection accuracy.

[0054] The above-mentioned clamps 8 can be pneumatic clamps or manual clamps, Figure 1 The clamps 8 shown in the figure are manual clamps, which comprise a support seat, a threaded rod, a nut, a pressing plate and a pad. The pad is not shown in the figure. The support seat is fixed on the workbench 1 by bolts. The threaded rod is screwed on the top of the support seat. The nut is screwed on the threaded rod. The pressing plate is provided with a waist-shaped hole. The threaded rod passes through the waist-shaped hole. When fixed, one end of the pressing plate is placed on the transmission case. A pad with appropriate thickness is placed on the top of the support seat. Then the other end of the pressing plate is placed on the pad, so that the pressing plate is in a horizontal state. After the nut is tightened, the pressing plate is tightly fixed on the transmission case.

[0055] At the same time, the position of the end part of the shaft hole of the transmission case is generally high. Therefore, in order to facilitate measurement, the flatness detection tooling of the transmission case further comprises a gauge placing table 9, wherein a plurality of gauge placing tables 9 are detachably arranged on the top of the workbench 1. The top surface of the gauge placing table 9 is parallel to the top surface of the workbench 1. When measuring, the measuring instrument (such as a dial indicator, a height gauge, etc.) is placed on the gauge placing table 9, and the gauge placing table 9 is used to measure the flatness, height and other parameters of the end surface of the shaft hole on the top of the transmission case.

[0056] In addition, a plurality of inner threaded holes for installing the clamps 8 and the gauge placing tables 9 are arranged at different positions of the workbench 1. Selecting the inner threaded holes at different positions can change the use positions of the clamps 8 and the gauge placing tables 9, so as to adapt to the detection of transmission cases with different sizes.

[0057] In actual processing, the surface of the gearbox shell may carry debris due to the influence of the processing environment, and these debris may fall on the top surface of the workbench 1 during measurement. In order to facilitate the cleaning of these debris, as shown in the drawings, a plurality of slag holes 101 are provided vertically through the workbench 1, and these slag holes 101 can quickly clean these debris away from the workbench 1. Figure 1

[0058] The use method of the flatness detection tool for the gearbox shell of the utility model is as follows:

[0059] Firstly, the workbench 1 is fixed on the detection platform by bolts, then the gearbox shell is hoisted to the upper side of the workbench 1 by the lifting tool, the gearbox shell is slowly lowered, the gearbox shell is inverted on the workbench 1, during the process, the top of the inner cavity of the gearbox shell first contacts the rubber plate 4, with the lowering process, the gearbox shell forces the rubber plate 4 to move downward, during the process, the compression spring 5 is compressed and deformed to buffer the intensity of the gearbox shell lowering, so that the gearbox shell slowly lands on the workbench 1, after landing, the clamp 8 is used to clamp and fix the gearbox shell, then the measuring instrument is placed on the instrument placing table 9, and the instrument placing table 9 is used to measure the flatness, height and other parameters of the top shaft hole end surface of the gearbox shell.

[0060] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.​

Claims

1. A flatness detection tool for a gearbox housing, comprising a worktable (1), characterized in that: It further includes a first outer sleeve (2), a first inner rod (3), a rubber plate (4) and a compression spring (5), wherein, One end of the first outer sleeve (2) is fixed on the top of the workbench (1), and the other end extends upward; One end of the first inner rod (3) is vertically slidably arranged inside the first outer sleeve (2), and the other end is detachably connected to the rubber plate (4), and the top of the rubber plate (4) is used to support the gearbox shell; The compression spring (5) is sleeved outside the first outer sleeve (2), one end of the compression spring (5) abuts against the top of the workbench (1), and the other end abuts against the bottom of the rubber plate (4), and the compression spring (5) is used to buffer the force when the first inner rod (3) moves downward.

2. The flatness detection tool of the gearbox housing according to claim 1, characterized in that: The first inner rod (3) is detachably connected to the first outer sleeve (2), and the length of the compression spring (5) is greater than the length of the first outer sleeve (2).

3. The flatness detection tool of a gearbox housing according to claim 2, characterized in that: A first threaded hole (401) is vertically arranged through the rubber plate (4), and the upper end of the first inner rod (3) is screwed into the first threaded hole (401).

4. The flatness detection tool of the gearbox housing according to claim 3, characterized in that: A first buckle slot (301) is arranged on the top end of the first inner rod (3).

5. The flatness detection tool of a gearbox housing according to claim 1, characterized in that: It further includes a second outer sleeve (6) and a second inner rod (7), wherein, The second outer sleeve (6) is parallel to the first outer sleeve (2), and a plurality of second outer sleeves (6) are arranged in a circumferential annular array along the first outer sleeve (2), and one second inner rod (7) is slidably arranged in each second outer sleeve (6), and the upper end of the second inner rod (7) is detachably arranged on the rubber plate (4); The lower end of the second outer sleeve (6) is fixed on the top of the workbench (1), and the top end of the second outer sleeve (6) is horizontally aligned with the top end of the first outer sleeve (2).

6. The flatness detection tool of a gearbox housing according to claim 5, characterized in that: The second inner rod (7) is detachably connected to the second outer sleeve (6), the length of the second inner rod (7) is equal to the length of the first inner rod (3), and the top end of the second inner rod (7) is provided with a second buckle slot (701).

7. The flatness detection tool of a gearbox housing according to claim 6, characterized in that: A second threaded hole (402) is vertically arranged through the rubber plate (4) at a position corresponding to the second inner rod (7), wherein, The upper end of the second inner rod (7) is screwed into the corresponding second threaded hole (402).

8. The flatness detection tool of a gearbox housing according to claim 1, characterized in that: It further includes a clamp (8), wherein, A plurality of clamps (8) are detachably arranged on the top of the workbench (1).

9. The flatness detection tool of a gearbox housing according to claim 8, characterized in that: It further includes a gauge placing table (9), wherein, A plurality of gauge placing tables (9) are detachably arranged on the top of the workbench (1). The top surface of the gauge placing table (9) is parallel to the top surface of the workbench (1).

10. The flatness detection tool of a gearbox housing according to claim 1, characterized in that: A plurality of slag holes (101) are vertically arranged through the workbench (1).

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