A small modulus gear strength testing device

Abstract

The present invention discloses a small modulus gear strength detection device, which includes a lower die, an upper die, a middle plate, and a test shaft. The upper die is located at the upper end side of the lower die, and the gap between the upper die and the lower die is a detection placement gap; the lower end of the test shaft is installed on the lower die through a lower end bearing, and the upper end of the test shaft is installed on the upper die through an upper end bearing, and the upper end of the test shaft extends to the upper end side of the upper die, and the test shaft is fitted with a standard test gear; the middle plate is located between the upper die and the lower die and is located at the right end side of the detection placement gap, a movable slider is embedded in the movable chamber between the middle plate and the lower die, a displacement rack is arranged at the left end of the movable slider, and the movable slider is pushed by a displacement top screw; an upper T-shaped hole is provided on the upper die plate, an upper T-shaped slider is embedded in the upper T-shaped hole, and a gear positioning shaft is embedded in the upper slider through hole of the upper T-shaped slider. Through the above structural design, the present invention has the advantages of novel structural design and simple and convenient testing, and is particularly suitable for small modulus gear strength detection.

Description

Technical Field

[0001] The invention relates to the technical field of gear strength detection devices, and in particular to a small-module gear strength detection device. Background Art

[0002] For plastic gears, gear strength testing is an important means to determine the strength of plastic gears; however, the industry currently has no effective gear strength testing solution for plastic gears with a module below 0.25 because the gear module is too small, and the single tooth strength of small-module gears has always been a blind spot. Summary of the invention

[0003] The purpose of the present invention is to provide a small-module gear strength detection device, which has a novel structural design, is simple and convenient to test, and is particularly suitable for small-module gear strength detection.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions.

[0005] A small-module gear strength detection device comprises a lower die and an upper die which are arranged horizontally and laterally, the upper die is located at the upper end side of the lower die and the upper die and the lower die are arranged at a distance, and the gap between the upper die and the lower die is a detection placement gap;

[0006] The small-module gear strength detection device also includes a test shaft arranged vertically and located in the detection placement gap, the lower end of the test shaft is installed on the lower mold through a lower end bearing, the upper end of the test shaft is installed on the upper mold through an upper end bearing, and the upper end of the test shaft extends to the upper end side of the upper mold; the test shaft is equipped with a standard test gear that rotates synchronously with the test shaft and is located in the detection placement gap, and the standard test gear is arranged horizontally;

[0007] A middle plate located at the right end side of the detection placement gap is installed between the upper die and the lower die, and an active chamber opening toward the left side is formed between the middle plate and the lower die, and an active slider whose shape matches the shape of the active chamber is embedded in the active chamber, and a displacement rack is arranged at the left end of the active slider; an internal threaded hole opening toward the right side and connected to the active chamber is opened at the right end of the middle plate, and a displacement top screw extending horizontally along the left and right directions is screwed into the internal threaded hole, and the left end of the displacement top screw extends into the active chamber and the left end of the displacement top screw abuts against the right end of the active slider, and the right end of the displacement top screw extends to the right end side of the middle plate;

[0008] The upper template is provided with an upper T-shaped hole which completely penetrates from top to bottom and extends in the left-right direction, and an upper T-shaped slider is embedded in the upper T-shaped hole. The upper T-shaped slider is provided with an upper slider through hole which completely penetrates from top to bottom, and a gear locating shaft which is vertically arranged and used to fit the gear to be tested is embedded in the upper slider through hole. The lower end of the gear locating shaft extends into the detection placement gap and the gear locating shaft is located between the standard test gear and the displacement rack.

[0009] The movable slider is provided with a slider protrusion extending downwardly, the lower mold is provided with a spring mounting hole opening upwardly and extending in the left-right direction, and the slider protrusion of the movable slider is embedded in the spring mounting hole of the lower mold;

[0010] A return spring is embedded in the spring installation hole of the lower die, which is arranged horizontally and located on the left end side of the slider protrusion. The right end of the return spring abuts against the slider protrusion of the movable slider, and the left end of the return spring abuts against the lower die.

[0011] Wherein, the displacement rack and the movable slider are an integrated structure.

[0012] Wherein, the displacement rack is screwed and fastened to the left end portion of the movable sliding block.

[0013] The upper end of the test shaft is flat, and the center hole of the standard test gear is also flat.

[0014] Among them, the lower template is provided with a lower T-shaped hole which is completely penetrated from top to bottom and extends along the left-right direction, the lower T-shaped hole is aligned with the upper T-shaped hole, a lower T-shaped slider is embedded in the lower T-shaped hole, the lower T-shaped slider is provided with a lower slider through hole which is completely penetrated from top to bottom and aligned with the upper slider through hole, and the lower end of the gear positioning shaft is embedded in the lower slider through hole of the lower T-shaped slider.

[0015] Wherein, at least two upwardly protruding fixing columns are arranged at the left end portion of the upper surface of the lower die, and the upper die is screwed and fastened to the fixing columns of the lower die by means of locking screws.

[0016] Wherein, the middle plate is screwed and fastened to the lower mold by locking screws.

[0017] Wherein, a gap for avoiding air is opened at the front end of the upper mold.

[0018] The beneficial effects of the present invention are as follows: the small-module gear strength detection device described in the present invention comprises a lower die and an upper die which are respectively arranged horizontally and laterally, the upper die is located at the upper end side of the lower die and the upper die is arranged at an interval with the lower die, and the gap between the upper die and the lower die is a detection placement gap; the small-module gear strength detection device also comprises a test shaft which is arranged vertically and located in the detection placement gap, the lower end of the test shaft is mounted on the lower die through a lower end bearing, the upper end of the test shaft is mounted on the upper die through an upper end bearing, and the upper end of the test shaft extends to the upper end side of the upper die; the test shaft is provided with a standard test gear which rotates synchronously with the test shaft and is located in the detection placement gap, and the standard test gear is arranged horizontally and laterally; a middle plate which is located at the right end side of the detection placement gap is installed between the upper die and the lower die, and an active chamber which opens to the left side is formed between the middle plate and the lower die, and a gear is embedded in the active chamber. There is a movable slider whose shape matches the shape of the movable chamber, and a displacement rack is arranged at the left end of the movable slider; the right end of the middle plate is provided with an internal threaded hole which opens to the right side and is connected to the movable chamber, and a displacement top screw extending horizontally along the left and right directions is screwed into the internal threaded hole, and the left end of the displacement top screw extends into the movable chamber and the left end of the displacement top screw abuts against the right end of the movable slider, and the right end of the displacement top screw extends to the right end side of the middle plate; the upper template is provided with an upper end T-shaped hole which is completely penetrated from top to bottom and extends along the left and right directions, and an upper end T-shaped slider is embedded in the upper end T-shaped hole, and an upper end slider through hole which is completely penetrated from top to bottom is provided in the upper end T-shaped slider, and a gear positioning shaft which is arranged vertically and used to fit the gear to be tested is embedded in the upper end slider through hole, and the lower end of the gear positioning shaft extends into the detection placement gap and the gear positioning shaft is located between the standard test gear and the displacement rack. Through the above structural design, the present invention has the advantages of novel structural design and simple and convenient testing, and is particularly suitable for strength testing of small modulus gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below with the aid of the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the decomposition of the present invention.

[0022] Figure 3 It is a cross-sectional schematic diagram of the present invention.

[0023] Figure 4 It is a cross-sectional schematic diagram of another position of the present invention.

[0024] exist Figures 1 to 4 Included are:

[0025] 1——Lower die 11——Spring mounting hole

[0026] 12——T-shaped hole at the lower end 13——Fixed column

[0027] 2——Upper die 21——T-shaped hole at the upper end

[0028] 22——avoid gap 3——detect placement gap

[0029] 41——Test shaft 42——Lower end bearing

[0030] 43 - Upper bearing 5 - Standard test gear

[0031] 6——Middle plate 61——Internal threaded hole

[0032] 7——Active chamber 81——Active slider

[0033] 811——Slider protrusion 82——Displacement rack

[0034] 83——Displacement screw 84——Reset spring

[0035] 91——Upper T-shaped slider 911——Upper slider through hole

[0036] 92——Gear positioning shaft 93——T-shaped slider at the lower end

[0037] 931——through hole of the lower end slider 100——gear to be tested. DETAILED DESCRIPTION

[0038] The present invention is described below in conjunction with specific implementation methods.

[0039] like Figures 1 to 4 As shown, a small-module gear strength detection device includes a lower die 1 and an upper die 2 which are arranged horizontally and laterally, the upper die 2 is located on the upper end side of the lower die 1 and the upper die 2 and the lower die 1 are arranged at intervals, and the gap between the upper die 2 and the lower die 1 is a detection placement gap 3; wherein, the lower die 1 and the upper die 2 of the present invention can be assembled and connected in the following manner, specifically: at least two upwardly protruding fixing columns 13 are provided at the left end portion of the upper surface of the lower die 1, and the upper die 2 is screwed and fastened to the fixing column 13 of the lower die 1 by locking screws.

[0040] Furthermore, the small-module gear strength detection device also includes a test shaft 41 arranged vertically and located in the detection placement gap 3, the lower end of the test shaft 41 is installed on the lower mold 1 through a lower end bearing 42, the upper end of the test shaft 41 is installed on the upper mold 2 through an upper end bearing 43, and the upper end of the test shaft 41 extends to the upper end side of the upper mold 2; the test shaft 41 is equipped with a standard test gear 5 that rotates synchronously with the test shaft 41 and is located in the detection placement gap 3, and the standard test gear 5 is arranged horizontally;

[0041] Furthermore, a middle plate 6 is installed between the upper die 2 and the lower die 1 and is located at the right end of the detection placement gap 3. An active chamber 7 opening toward the left is formed between the middle plate 6 and the lower die 1. An active slider 81 whose shape matches that of the active chamber 7 is embedded in the active chamber 7. A displacement rack 82 is provided at the left end of the active slider 81. An internal threaded hole 61 opening toward the right and connected to the active chamber 7 is provided at the right end of the middle plate 6. A displacement top screw 83 extending horizontally along the left and right directions is screwed into the internal threaded hole 61. The left end of the displacement top screw 83 extends into the active chamber 7 and the left end of the displacement top screw 83 abuts against the right end of the active slider 81. The right end of the displacement top screw 83 extends to the right end side of the middle plate 6. The middle plate 6 is screwed and fastened to the lower die 1 by a locking screw.

[0042] In addition, the upper mold plate 2 is provided with an upper T-shaped hole 21 which is completely penetrated from top to bottom and extends along the left-right direction. An upper T-shaped slider 91 is embedded in the upper T-shaped hole 21. The upper T-shaped slider 91 is provided with an upper slider through hole 911 which is completely penetrated from top to bottom. A gear positioning shaft 92 which is vertically arranged and used to fit the gear 100 to be tested is embedded in the upper slider through hole 911. The lower end of the gear positioning shaft 92 extends into the detection placement gap 3 and the gear positioning shaft 92 is located between the standard test gear 5 and the displacement rack 82.

[0043] It should be pointed out that the movable slider 81 is provided with a slider protrusion 811 protruding and extending downward, and the lower mold 1 is provided with a spring mounting hole 11 which opens upward and extends along the left and right directions. The slider protrusion 811 of the movable slider 81 is embedded in the spring mounting hole 11 of the lower mold 1; the spring mounting hole 11 of the lower mold 1 is embedded with a return spring 84 which is horizontally arranged and located on the left end side of the slider protrusion 811, and the right end of the return spring 84 abuts against the slider protrusion 811 of the movable slider 81, and the left end of the return spring 84 abuts against the lower mold 1.

[0044] For the movable slider 81 and the displacement rack of the present invention, both can adopt an integrated structural design or a split structural design, that is, the displacement rack 82 and the movable slider 81 are an integrated structure; or, the displacement rack 82 is screwed and fastened to the left end of the movable slider 81.

[0045] In order to ensure that the standard test gear 5 and the test shaft 41 rotate synchronously, the present invention adopts the following structural design. Specifically, the upper end of the test shaft 41 is flat, and the center hole of the standard test gear 5 is also flat.

[0046] In order to facilitate the staff to take and place the gear 100 to be tested, the present invention adopts the following structural design, specifically: a gap 22 is opened at the front end of the upper mold 2 to avoid air.

[0047] In addition, the lower mold 1 plate is provided with a lower T-shaped hole 12 which completely penetrates from top to bottom and extends in the left-right direction. The lower T-shaped hole 12 is aligned with the upper T-shaped hole 21. A lower T-shaped slider 93 is embedded in the lower T-shaped hole 12. The lower T-shaped slider 93 is provided with a lower slider through hole 931 which completely penetrates from top to bottom and is aligned with the upper slider through hole 911. The lower end of the gear positioning shaft 92 is embedded in the lower slider through hole 931 of the lower T-shaped slider 93.

[0048] In the process of using the present invention to perform strength testing on small module gears, the testing steps are as follows, specifically:

[0049] Step 1, lift the gear positioning shaft 92 upward or lift the gear positioning shaft 92 together with the upper T-shaped slider 91 upward, so that the lower end of the gear positioning shaft 92 is withdrawn from the lower slider through hole 931 of the lower T-shaped slider 93;

[0050] Step 2: After the gear positioning shaft 92 exits the lower end slider through hole 931 of the lower end T-shaped slider 93, the gear 100 to be tested is mounted on the gear positioning shaft 92, and then the gear positioning shaft 92 is reset so that the lower end of the gear positioning shaft 92 is reinserted into the lower end slider through hole 931 of the lower end T-shaped slider 93;

[0051] Step 3, after the gear 100 to be tested is installed, the displacement screw 83 is rotated and the movable slider 81 is pushed toward the left side by the displacement screw 83. The movable slider 81 moves toward the left side under the pushing action of the displacement screw 83. The movable slider 81 moving toward the left side drives the displacement rack 82 to move toward the left side synchronously. During this process, the displacement rack 82 will mesh with the gear 100 to be tested, and the movable slider 81 pushes the gear 100 to be tested to move toward the left side, and finally the gear 100 to be tested is meshed with the standard test gear 5, and the gear 100 to be tested and the standard test gear 5 are meshed without backlash;

[0052] Step 4: After the gear 100 to be tested is meshed with the standard test gear 5, a torque meter is installed on the upper end of the test shaft 41, and the test shaft 41 is rotated by the torque meter. During this process, the standard test gear 5 rotates synchronously with the test shaft 41, and force is continuously applied until the gear 100 to be tested fails. The single tooth strength of the gear 100 to be tested can be obtained by reading the maximum value of the torque meter;

[0053] Step 5. After the gear 100 to be tested has been tested, rotate the displacement screw 83 in the opposite direction. During this process, the reset spring 84 pushes the slider protrusion 811 of the movable slider 81 and causes the movable slider 81 to move left and reset. After the movable slider 81 moves left and resets, lift the gear positioning shaft 92 upward or lift the gear positioning shaft 92 together with the upper T-shaped slider 91 upward to disengage the tested gear from the gear positioning shaft 92.

[0054] It should be emphasized that when the movable slider 81 pushes the gear to be tested 100 to move to the left, the upper T-shaped slider 91 moves along the upper T-shaped hole 21 and the lower T-shaped slider 93 moves along the lower T-shaped hole 12, thereby guiding the gear positioning shaft 92.

[0055] In summary, it can be seen that, through the above structural design, the present invention has the advantages of novel structural design and simple and convenient testing, and is particularly suitable for strength testing of small-module gears.

[0056] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A small modulus gear strength detection device, characterized in that: It comprises a lower die (1) and an upper die (2) which are arranged horizontally and laterally, the upper die (2) is located on the upper end side of the lower die (1) and the upper die (2) and the lower die (1) are arranged at a distance, and the gap between the upper die (2) and the lower die (1) is a detection placement gap (3); The small-module gear strength testing device further comprises a test shaft (41) arranged vertically and located in a testing placement gap (3); the lower end of the test shaft (41) is mounted on the lower die (1) via a lower end bearing (42); the upper end of the test shaft (41) is mounted on the upper die (2) via an upper end bearing (43); and the upper end of the test shaft (41) extends to the upper end side of the upper die (2); the test shaft (41) is sleeved with a standard test gear (5) which rotates synchronously with the test shaft (41) and is located in the testing placement gap (3); the standard test gear (5) is arranged horizontally; A middle plate (6) located at the right end of the detection placement gap (3) is installed between the upper die (2) and the lower die (1); an active chamber (7) opening toward the left is formed between the middle plate (6) and the lower die (1); an active slider (81) having a shape matching that of the active chamber (7) is embedded in the active chamber (7); a displacement rack (82) is provided at the left end of the active slider (81); an internal threaded hole (61) opening toward the right and communicating with the active chamber (7) is provided at the right end of the middle plate (6); a displacement top screw (83) extending horizontally in the left-right direction is threadedly installed in the internal threaded hole (61); the left end of the displacement top screw (83) extends into the active chamber (7) and the left end of the displacement top screw (83) abuts against the right end of the active slider (81); and the right end of the displacement top screw (83) extends to the right end side of the middle plate (6); The upper mold (2) plate is provided with an upper T-shaped hole (21) which is completely penetrated from top to bottom and extends in the left-right direction; an upper T-shaped slider (91) is embedded in the upper T-shaped hole (21); an upper slider through hole (911) which is completely penetrated from top to bottom is provided in the upper T-shaped slider (91); a gear positioning shaft (92) which is arranged vertically and is used to fit the gear (100) to be tested is embedded in the upper slider through hole (911); the lower end of the gear positioning shaft (92) extends into the detection placement gap (3) and the gear positioning shaft (92) is located between the standard test gear (5) and the displacement rack (82).

2. A small modulus gear strength detection device according to claim 1, characterized in that: The movable slider (81) is provided with a slider protrusion (811) protruding and extending downward, the lower mold (1) is provided with a spring mounting hole (11) opening upward and extending in the left-right direction, and the slider protrusion (811) of the movable slider (81) is embedded in the spring mounting hole (11) of the lower mold (1); A return spring (84) is embedded in the spring mounting hole (11) of the lower die (1) and is arranged horizontally and laterally and is located on the left end side of the slider protrusion (811). The right end of the return spring (84) abuts against the slider protrusion (811) of the movable slider (81), and the left end of the return spring (84) abuts against the lower die (1).

3. A small modulus gear strength detection device according to claim 1, characterized in that: The displacement rack (82) and the movable slider (81) are an integral structure.

4. A small modulus gear strength detection device according to claim 1, characterized in that: The displacement rack (82) is screwed and fastened to the left end of the movable sliding block (81).

5. The small modulus gear strength detection device according to claim 1, characterized in that: The upper end portion of the test shaft (41) is flat, and the center hole of the standard test gear (5) is also flat.

6. A small modulus gear strength detection device according to claim 1, characterized in that: The lower mold plate (1) is provided with a lower T-shaped hole (12) which completely penetrates the upper mold plate and extends in the left-right direction. The lower T-shaped hole (12) is aligned with the upper T-shaped hole (21). A lower T-shaped slider (93) is embedded in the lower T-shaped hole (12). The lower T-shaped slider (93) is provided with a lower slider through hole (931) which completely penetrates the upper mold plate and is aligned with the upper slider through hole (911). The lower end of the gear positioning shaft (92) is inserted into the lower slider through hole (931) of the lower T-shaped slider (93).

7. A small-module gear strength detection device according to claim 1, characterized in that: At least two upwardly protruding fixing columns (13) are provided at the left end portion of the upper surface of the lower die (1), and the upper die (2) is screwed and fastened to the fixing columns (13) of the lower die (1) by means of locking screws.

8. The small-module gear strength detection device according to claim 1, characterized in that: The middle plate (6) is screwed to the lower die (1) by means of locking screws.

9. A small modulus gear strength detection device according to claim 1, characterized in that: A gap (22) is provided at the front end of the upper die (2).

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