Saddle length measuring device

Abstract

The utility model relates to the technical field of measuring instruments, in particular to a saddle length measuring device, and the device comprises a main body member which is provided with a first installation part and a second installation part; the first measuring scale is telescopically arranged on the first mounting part; the second measuring scale is telescopically arranged on the second mounting part; a preset angle is formed between the first measuring scale and the second measuring scale; and the gradienter is arranged on the main body component. The saddle length measuring device serves as a saddle measuring appliance, can measure or detect the length of the saddle of a bicycle, a two-wheeled electric vehicle and a three-wheeled electric vehicle, is simple in structure, convenient to operate and easy to store, does not need to repeatedly determine the angle in the measuring process, reduces the tedious degree of the measuring process, reduces time consumption, and improves the measuring efficiency. And meanwhile, the measurement precision is improved to a certain extent.

Description

Technical Field

[0001] The present application relates to the technical field of measuring instruments, and in particular to a saddle length measuring device. Background Art

[0002] At present, when measuring the saddle length of two-wheeled vehicles and three-wheeled vehicles, the traditional method usually requires the use of digital inclinometers, angle measuring instruments, high-precision levels, etc., to find the angles in front and behind the saddle and find the 30° saddle focus, as recorded in the measurement method specified in GB 17761-2018 (such as Figure 1 ): For the horizontal position of the saddle, the front and rear wheels of the test vehicle are on the ground, and the vehicle body is perpendicular to the support surface; on the longitudinal center plane of the test vehicle, select the intersection of the front edge of the saddle and the horizontal plane at 30° as the front end of the saddle, draw a vertical line to the ground along the front end of the saddle and the center line of the middle axis, and visually observe the horizontal position relationship between the front end of the saddle and the center line of the middle axis. If the saddle tube can be adjusted, the saddle tube should be adjusted to the minimum insertion depth for measurement. The traditional saddle length detection method requires repeated searching and confirmation of angles in the process of finding the intersection of the saddle, which is not only time-consuming, but also has large errors. Utility Model Content

[0003] The purpose of this application is to provide a saddle length measuring device to solve the technical problem that the existing saddle length detection method in the prior art needs to repeatedly search and confirm the angle in the process of finding the saddle focus, which is not only time-consuming but also has large errors.

[0004] The present application provides a saddle length measuring device, comprising: a main body component, wherein the main body component is provided with a first mounting portion and a second mounting portion;

[0005] a first measuring ruler, wherein the first measuring ruler is telescopically disposed on the first mounting portion;

[0006] a second measuring ruler, the second measuring ruler being telescopically disposed on the second mounting portion;

[0007] A predetermined angle is formed between the first measuring ruler and the second measuring ruler;

[0008] A level is arranged on the main component.

[0009] In the above technical solution, further, the main body component includes a first side wall, a second side wall and a third side wall connected end to end in sequence, and the first side wall, the second side wall and the third side wall are distributed in a triangular shape;

[0010] One end of the first side wall abuts against one end of the second side wall, and an angle formed between the first side wall and the second side wall is the same as the predetermined angle.

[0011] In any of the above technical solutions, further, the first mounting portion is arranged on the first side wall; the first mounting portion includes a first slide rail and a second slide rail, the first slide rail and the second slide rail are parallel to each other and symmetrically arranged, and the first slide rail and the second slide rail both extend along the length direction of the first side wall;

[0012] The second mounting portion is arranged on the second side wall; the second mounting portion includes a third slide rail and a fourth slide rail, the third slide rail and the fourth slide rail are parallel to each other and symmetrically arranged, and the third slide rail and the fourth slide rail both extend along the length direction of the second side wall.

[0013] In any of the above technical solutions, further, the first measuring ruler is in the shape of a long strip, and the first measuring ruler is provided with a first sliding portion and a second sliding portion, the first sliding portion is slidably connected to the first slide rail, and the second sliding portion is slidably connected to the second slide rail;

[0014] The second measuring ruler is in the shape of a long strip, and is provided with a third sliding connection portion and a fourth sliding connection portion. The third sliding connection portion is slidably connected to the third slide rail, and the fourth sliding connection portion is slidably connected to the fourth slide rail.

[0015] In any of the above technical solutions, further, the length of the first measuring ruler is not greater than the length of the first side wall; the length of the second measuring ruler is not greater than the length of the second side wall.

[0016] In any of the above technical solutions, further, a portion of the main component is hollowed out to form a gripping portion.

[0017] In any of the above technical solutions, further, the saddle length measuring device also includes a clamping piece, which is arranged on the main component; the clamping piece is in the shape of an elongated strip, one end of the clamping piece extends toward the first side wall, and the other end of the clamping piece extends toward the second side wall, and the clamping piece has an elastic deformation portion, which is arranged in the holding portion.

[0018] In any of the above technical solutions, further, the first side wall is provided with a first through hole, the second side wall is provided with a second through hole, one end of the clamping member can pass through the first through hole and abut against the first measuring scale, and the other end of the clamping member can pass through the second through hole and abut against the second measuring scale.

[0019] In any of the above technical solutions, further, the main component is provided with a third mounting portion, and the level is provided on the third mounting portion;

[0020] The length direction of the level is parallel to the length direction of the third side wall.

[0021] In any of the above technical solutions, further, the predetermined angle is 120°; and the length of the first side wall is the same as that of the second side wall.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] The saddle length measuring device provided in the present application includes: a main component, the main component is provided with a first mounting portion and a second mounting portion; a first measuring ruler, the first measuring ruler is telescopically arranged on the first mounting portion; a second measuring ruler, the second measuring ruler is telescopically arranged on the second mounting portion; a predetermined angle is formed between the first measuring ruler and the second measuring ruler; and a level, the level is arranged on the main component.

[0024] The saddle length measuring device provided in the present application, as an instrument for saddle measurement, can measure or detect the length of the saddle of a bicycle, a two-wheeled electric vehicle, and a three-wheeled electric vehicle. It has a simple structure, is easy to operate, and is easy to store. During the measurement process, there is no need to repeatedly determine the angle, which reduces the complexity of the measurement process, reduces time consumption, and also improves the measurement accuracy to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a schematic diagram of the front end and rear end of a saddle in the background technology;

[0027] Figure 2 A schematic diagram of the structure of a saddle length measuring device provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of the main components of the saddle length measuring device provided in an embodiment of the present application;

[0029] Figure 4 Another structural schematic diagram of the saddle length measuring device provided in an embodiment of the present application;

[0030] Figure 5 for Figure 3 An enlarged schematic diagram of the saddle length measuring device at position A is provided;

[0031] Figure 6A partial structural schematic diagram of a saddle length measuring device provided in an embodiment of the present application.

[0032] Reference numerals:

[0033] 1-main component, 101-first side wall, 1011-first penetration hole, 102-second side wall, 1021-second penetration hole, 103-third side wall, 104-front wall, 105-first mounting portion, 1051-first slide rail, 10511-support portion, 10512-limiting portion, 1052-second slide rail, 106-second mounting portion, 1061-third slide rail, 1062-fourth slide rail, 107-gripping portion, 2-level meter, 3-first measuring ruler, 301-first sliding portion, 4-second measuring ruler, 5-pressing member, 501-elastic deformation portion. DETAILED DESCRIPTION

[0034] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0035] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0036] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Refer to the following Figures 2 to 6 A saddle length measuring device according to an embodiment of the present application is described.

[0040] See also Figures 2 to 6 As shown, an embodiment of the present application provides a saddle length measuring device, which includes a main component 1, a first measuring ruler 3, a second measuring ruler 4 and a spirit level 2, wherein the spirit level 2 is arranged on the main component 1, and the main component 1 is provided with a first mounting portion 105 and a second mounting portion 106, the first measuring ruler 3 is telescopically arranged on the first mounting portion 105, and the second measuring ruler 4 is telescopically arranged on the second mounting portion 106, one end of the first measuring ruler 3 and one end of the second measuring ruler 4 can abut or approach each other, and the other end of the first measuring ruler 3 and the other end of the second measuring ruler 4 are away from each other, so that the first measuring ruler 3 and the second measuring ruler 4 are arranged at an angle, and a predetermined angle is formed between the two, and due to the restriction of the first mounting portion 105 and the second mounting portion 106 on the telescopic direction of the first measuring ruler 3 and the second measuring ruler 4, the angle between the first measuring ruler 3 and the second measuring ruler 4 will not change.

[0041] In one embodiment of the present application, preferably, Figure 3 As shown, the main body component 1 includes a first side wall 101, a second side wall 102 and a third side wall 103 connected end to end in sequence, and the first side wall 101, the second side wall 102 and the third side wall 103 are distributed in a triangular shape;

[0042] One end of the first side wall 101 abuts against one end of the second side wall 102 , and an angle formed between the first side wall 101 and the second side wall 102 is the same as the predetermined angle.

[0043] In this embodiment, the main body component 1 has a triangular prism structure. Figure 2 and Figure 3In the state shown, that is, the state in which the saddle length measuring device is in use, the main component 1 includes three side walls connected end to end, namely a first side wall 101, a second side wall 102 and a third side wall 103. The three side walls are distributed in a triangular shape, and the upper end of the first side wall 101 abuts against the upper end of the second side wall 102. The third side wall 103 serves as a bottom wall, and one end of the third side wall 103 is connected to the lower end of the first side wall 101, and the other end of the third side wall 103 is connected to the lower end of the second side wall 102.

[0044] In addition, the main body component 1 also includes a front wall surface 104 and a rear wall surface, both of which have a triangular flat plate structure. The front wall surface 104 and the rear wall surface have the same shape and structure, and the two are arranged opposite to each other. The first side wall 101, the second side wall 102 and the third side wall 103 are connected to the front wall surface 104 and the rear wall surface at the same time, thereby jointly forming a triangular prism structure of the main body component 1.

[0045] Preferably, the interior of the main component 1 is a solid structure. It should be noted that the main component 1 has an integrated structure, and the above description of the first side wall 101, the second side wall 102, the third side wall 103, the front wall surface 104 and the rear wall surface is intended to clearly describe the structure of the main component 1, and does not mean that each part can be disassembled.

[0046] In one embodiment of the present application, preferably, the predetermined angle is 120°; the length of the first side wall 101 is the same as that of the second side wall 102 .

[0047] In this embodiment, the length of the first side wall 101 is the same as that of the second side wall 102, so that the triangle formed by the first side wall 101, the second side wall 102 and the third side wall 103 is an isosceles triangle. The angle between the first side wall 101 and the second side wall 102 corresponds to the predetermined angle between the first measuring ruler 3 and the second measuring ruler 4, both of which are 120°, so that the internal angle between the first side wall 101 and the third side wall 103 is 30°, and the internal angle between the second side wall 102 and the third side wall 103 is 30°, so as to ensure that when the first measuring ruler 3 and the second measuring ruler 4 measure the front and rear ends of the saddle, the posture of the saddle length measuring device is adjusted by the level 2, so that the first measuring ruler 3 and the front end of the saddle can form an angle of 30° between the first measuring ruler 3 and the horizontal plane after the intersection exists, and similarly, the second measuring ruler 4 and the rear end of the saddle can form an angle of 30° between the second measuring ruler 4 and the horizontal plane after the intersection exists, so as to meet the measurement specification.

[0048] In one embodiment of the present application, preferably, Figure 3As shown, the first mounting portion 105 is disposed on the first side wall 101; the first mounting portion 105 includes a first slide rail 1051 and a second slide rail 1052, the first slide rail 1051 and the second slide rail 1052 are parallel to each other and symmetrically arranged, and the first slide rail 1051 and the second slide rail 1052 both extend along the length direction of the first side wall 101;

[0049] The second mounting portion 106 is disposed on the second side wall 102 ; the second mounting portion 106 includes a third slide rail 1061 and a fourth slide rail 1062 , the third slide rail 1061 and the fourth slide rail 1062 are parallel and symmetrically arranged to each other, and the third slide rail 1061 and the fourth slide rail 1062 both extend along the length direction of the second side wall 102 .

[0050] In this embodiment, the first side wall 101 is in the shape of a long flat plate, the first slide rail 1051 and the second slide rail 1052 are arranged along the width direction of the first side wall 101, the length of the first slide rail 1051 and the length of the second slide rail 1052 both extend along the length direction of the first side wall 101, the first slide rail 1051 is arranged on one side of the first side wall 101, and the second slide rail 1052 is arranged on the other side of the second side wall 102.

[0051] The first slide rail 1051 has an L-shaped structure, including a supporting portion 10511 and a limiting portion 10512 arranged at an angle, the supporting portion 10511 is connected to the first side wall 101, the limiting portion 10512 is arranged on the supporting portion 10511, and the limiting portion 10512 is bent toward the second slide rail 1052, the structure of the second slide rail 1052 is the same as that of the first slide rail 1051, the second slide rail 1052 and the first slide rail 1051 are arranged in mirror symmetry, so that the limiting portion 10512 of the first slide rail 1051 and the limiting portion of the second slide rail 1052 are close to each other, so that the first measuring ruler 3 can be limited in the first mounting portion 105, so that the first measuring ruler 3 can only be extended and retracted along the length direction of the first mounting portion 105, and will not be displaced in the width direction of the first mounting portion 105.

[0052] The second mounting portion 106 is similar, and the structures and arrangements of the third slide rail 1061 and the fourth slide rail 1062 can refer to the above descriptions of the first slide rail 1051 and the second slide rail 1052 , which can be fully understood by those skilled in the art, and similar contents will not be repeated here.

[0053] In one embodiment of the present application, preferably, the first measuring ruler 3 is in the shape of a long strip, and the first measuring ruler 3 is provided with a first sliding portion 301 and a second sliding portion, the first sliding portion 301 is slidably connected to the first slide rail 1051, and the second sliding portion is slidably connected to the second slide rail 1052;

[0054] The second measuring ruler 4 is in the shape of a long strip and is provided with a third sliding portion and a fourth sliding portion. The third sliding portion is slidably connected to the third slide rail 1061 , and the fourth sliding portion is slidably connected to the fourth slide rail 1062 .

[0055] In this embodiment, the first measuring ruler 3 is arranged in the first mounting portion 105, and the two side edges of the first measuring ruler 3 along the width distribution are thinned, so that one of the two side edges forms a first sliding portion 301, the first sliding portion 301 is arranged in the first slide rail 1051, and the other side edge of the two side edges forms a second sliding portion, and the second sliding portion is arranged in the second slide rail 1052, so that the first measuring ruler 3 is slidably connected to the first mounting portion 105. When measuring, the first mounting portion 105 is slid out to contact with the front end of the mounting and form an intersection. As the extension length of the first measuring ruler 3 is different, the saddle length measuring device can meet the length measurement of saddles of different sizes.

[0056] The second measuring ruler 4 is formed with a third sliding portion and a fourth sliding portion. The specific manner of the sliding connection between the second measuring ruler 4 and the second mounting portion 106 can refer to the above description of the sliding connection between the first measuring ruler 3 and the first mounting portion 105. Those skilled in the art can fully understand it and will not be repeated here.

[0057] In one embodiment of the present application, preferably, the length of the first measuring ruler 3 is not greater than the length of the first side wall 101 ; and the length of the second measuring ruler 4 is not greater than the length of the second side wall 102 .

[0058] In this embodiment, preferably, the length of the first measuring ruler 3 is slightly smaller than the length of the first mounting portion 105, and the length of the second measuring ruler 4 is slightly smaller than the length of the second mounting portion 106, so that the first measuring ruler 3 can be completely received in the first mounting portion 105, the second measuring ruler 4 can be completely received in the second mounting portion 106, and the first measuring ruler 3 and the second measuring ruler 4 will not interfere with each other, and when measuring the length of the saddle, the first measuring ruler 3 and the second measuring ruler 4 can be slid out.

[0059] In one embodiment of the present application, preferably, Figures 2 to 4 As shown, part of the main component 1 is hollowed out to form a gripping portion 107 .

[0060] In this embodiment, the main component 1 is partially hollowed out to form a holding portion 107, which passes through the front wall 104 and the rear wall of the main component 1. The holding portion 107 is a runway-shaped hole. The length of the holding portion 107 extends along the length direction of the third side wall 103. The holding portion 107 is used for a staff member to hold the main component 1 to measure the saddle when the saddle length measuring device is used.

[0061] In one embodiment of the present application, preferably, Figure 2 and Figure 6 As shown, the saddle length measuring device also includes a clamping piece 5, which is arranged on the main component 1; the clamping piece 5 is in the shape of an elongated strip, one end of the clamping piece 5 extends toward the first side wall 101, and the other end of the clamping piece 5 extends toward the second side wall 102, and the clamping piece 5 has an elastic deformation portion 501, which is arranged in the gripping portion 107.

[0062] In one embodiment of the present application, preferably, Figure 3 As shown, the first side wall 101 is provided with a first through hole 1011, and the second side wall 102 is provided with a second through hole 1021. One end of the clamping member 5 can pass through the first through hole 1011 and abut against the first measuring scale 3, and the other end of the clamping member 5 can pass through the second through hole 1021 and abut against the second measuring scale 4.

[0063] In this embodiment, the clamping piece 5 is in the shape of a long strip, and along the length direction of the holding portion 107, a first penetration channel is provided at one end of the holding portion 107, and a second penetration channel is provided at the other end of the holding portion 107, and both the first penetration channel and the second penetration channel extend to the interior of the main body component 1, and part of the clamping piece 5 is located in the holding portion 107, one end of the clamping piece 5 is penetrated in the first penetration channel, and the other end of the clamping piece 5 is penetrated in the second penetration channel.

[0064] The first side wall 101 is provided with a first penetration hole 1011, which is arranged opposite to the first penetration channel and is communicated with the first penetration channel. The second side wall 102 is provided with a second penetration hole 1021, which is arranged opposite to the second penetration channel and is communicated with the second penetration channel.

[0065] The middle position of the pressing member 5 is formed with an elastic deformation portion 501. Figure 6 In the state shown, the pressing piece 5 is arranged on the lower surface of the hollow part, and the elastic deformation part 501 is arched upward. Preferably, the pressing piece 5 is made of metal material as a whole, so that the pressing piece 5 has elasticity as a whole. When the elastic deformation part 501 is pressed downward, the pressing piece 5 can extend to the left and right ends along its length, and one end of the pressing piece 5 can pass through the first penetration hole 1011 and abut against the first measuring ruler 3, so that the first measuring ruler 3 is limited in the current position in the first mounting part 105, and the other end of the pressing piece 5 can pass through the second penetration hole 1021 and abut against the second measuring ruler 4, so that the second measuring ruler 4 is limited in the current position in the second mounting part 106, so as to measure the length of the saddle.

[0066] In one embodiment of the present application, preferably, the main component 1 is provided with a third mounting portion, and the level 2 is provided on the third mounting portion;

[0067] In this embodiment, the third mounting portion is a groove formed by partially recessing the front wall surface 104 of the main component 1. The shape of the third mounting portion is compatible with the shape of the level 2, so that the level 2 can be embedded in the third mounting portion.

[0068] Preferably, the length direction of the spirit level 2 is parallel to the length direction of the third side wall 103. When the saddle length measuring device is in use, the posture of the saddle length measuring device is adjusted by observing the spirit level 2 so that the third side wall 103 can remain level with the horizontal plane. At this time, the intersection of the first measuring scale 3 and the front end of the saddle and the intersection of the second measuring scale 4 and the rear end of the saddle meet the measurement requirements. Then, the span between the first measuring scale 3 and the second measuring scale 4 can be measured to measure the length of the saddle.

[0069] When the saddle length measuring device is in use, observe the level meter 2 to keep it level at all times, pull out the first measuring ruler 3, make the end of the first measuring ruler 3 contact the end surface position of the front end of the saddle, and the first measuring ruler 3 and the front end surface of the saddle generate a first measuring intersection, pull out the second measuring ruler 4, make the end of the second measuring ruler 4 contact the end surface position of the rear end of the saddle, and the second measuring ruler 4 and the rear end surface of the saddle generate a second measuring intersection. During this process, the inspection staff can squat in front of the vehicle to be tested so as to intuitively determine the first measuring intersection and the second measuring intersection. After the two measuring intersections are determined, manually pinch the clamping piece 5 so that the end of the clamping piece 5 can contact the first measuring ruler 3 and the second measuring ruler 4 to limit the first measuring ruler 3 and the second measuring ruler 4, and then measure the distance between the end of the first measuring ruler 3 and the end of the second measuring ruler 4 by other rulers, which can correspond to the distance between the first measuring intersection and the second measuring intersection, thereby measuring the length of the saddle.

[0070] It should be noted that the first measurement intersection is preferably at the front end face of the saddle, and the second measurement intersection is preferably at the rear end face of the saddle. The first measuring ruler 3 and the second measuring ruler 4 measure the length of the saddle by correspondingly measuring the front end face and the rear end face of the saddle.

[0071] To sum up, the saddle length measuring device provided in the present application, as an instrument for saddle measurement, can measure or detect the length of the saddles of bicycles, two-wheeled electric vehicles, and three-wheeled electric vehicles. It has a simple structure, is easy to operate, and is easy to store. During the measurement process, there is no need to repeatedly determine the angle, which reduces the complexity of the measurement process, reduces time consumption, and also improves the measurement accuracy to a certain extent.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A saddle length measuring device, characterized in that: include: A main body component, wherein the main body component is provided with a first mounting portion and a second mounting portion; a first measuring ruler, wherein the first measuring ruler is telescopically disposed on the first mounting portion; a second measuring ruler, the second measuring ruler being telescopically disposed on the second mounting portion; A predetermined angle is formed between the first measuring ruler and the second measuring ruler; A level is arranged on the main component.

2. The saddle length measuring device according to claim 1, characterized in that: The main body component comprises a first side wall, a second side wall and a third side wall connected end to end in sequence, and the first side wall, the second side wall and the third side wall are distributed in a triangular shape; One end of the first side wall abuts against one end of the second side wall, and an angle formed between the first side wall and the second side wall is the same as the predetermined angle.

3. The saddle length measuring device according to claim 2, characterized in that: The first mounting portion is disposed on the first side wall; the first mounting portion comprises a first slide rail and a second slide rail, the first slide rail and the second slide rail are parallel to each other and symmetrically disposed, and the first slide rail and the second slide rail both extend along the length direction of the first side wall; The second mounting portion is arranged on the second side wall; the second mounting portion includes a third slide rail and a fourth slide rail, the third slide rail and the fourth slide rail are parallel to each other and symmetrically arranged, and the third slide rail and the fourth slide rail both extend along the length direction of the second side wall.

4. The saddle length measuring device according to claim 3, characterized in that: The first measuring ruler is in the shape of a long strip, and is provided with a first sliding connection portion and a second sliding connection portion, wherein the first sliding connection portion is slidably connected to the first slide rail, and the second sliding connection portion is slidably connected to the second slide rail; The second measuring ruler is in the shape of a long strip, and is provided with a third sliding connection portion and a fourth sliding connection portion. The third sliding connection portion is slidably connected to the third slide rail, and the fourth sliding connection portion is slidably connected to the fourth slide rail.

5. The saddle length measuring device according to claim 2, characterized in that: The length of the first measuring ruler is not greater than the length of the first side wall; the length of the second measuring ruler is not greater than the length of the second side wall.

6. The saddle length measuring device according to claim 2, characterized in that: Part of the main body component is hollowed out to form a gripping portion.

7. The saddle length measuring device according to claim 6, characterized in that: The saddle length measuring device also includes a clamping piece, which is arranged on the main component; the clamping piece is in the shape of an elongated strip, one end of the clamping piece extends toward the first side wall, and the other end of the clamping piece extends toward the second side wall, and the clamping piece has an elastic deformation portion, which is arranged in the gripping portion.

8. The saddle length measuring device according to claim 7, characterized in that: The first side wall is provided with a first through hole, the second side wall is provided with a second through hole, one end of the clamping member can pass through the first through hole and abut against the first measuring scale, and the other end of the clamping member can pass through the second through hole and abut against the second measuring scale.

9. The saddle length measuring device according to any one of claims 2 to 8, characterized in that: The main body component is provided with a third mounting portion, and the level is arranged on the third mounting portion; The length direction of the level is parallel to the length direction of the third side wall.

10. The saddle length measuring device according to any one of claims 2 to 8, characterized in that: The predetermined angle is 120°; the first side wall and the second side wall have the same length.

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