Adjustable flat key shaft

Abstract

The utility model discloses an adjustable flat key shaft which comprises a flat key shaft body, an installation groove is formed in the top of the flat key shaft body, a replacement part is arranged in the installation groove, a key groove is formed in the top of the replacement part, and clamping grooves are formed in the two sides of the replacement part. The rotary knob drives the screw rod to rotate, the screw rod drives the threaded sleeve to move upwards, the threaded sleeve drives the second inclined block to move upwards, the first inclined block loses limiting, the movable plate drives the clamping pin to move towards the side away from the clamping groove, the clamping pin is separated from the clamping groove, the clamping groove and the replacement part are not fixed, the replacement part is moved upwards, and the replacement part retreats from the interior of the installation groove. The operation mode of selecting the replacement part with the appropriate surface key groove size, placing the replacement part into the mounting groove and fixing the replacement part is reverse operation of the dismounting steps, the beneficial effect of replaceable adjustment is achieved, the key groove in the surface of the flat key shaft can be replaced and adjusted, the key groove can be connected with different matching parts, and the use efficiency of the flat key shaft is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flat key shafts, in particular to an adjustable flat key shaft. Background Art

[0002] A flat key shaft is usually used to connect a shaft and a hub so that they can rotate together and transmit torque. The characteristic of an adjustable flat key shaft is its adjustability.

[0003] When mechanical equipment transmits torque, a flat key shaft is required. The size of the keyway on the surface of a traditional flat key shaft is fixed. When encountering mating parts of other sizes, the keyway cannot be connected to the mating part, resulting in the flat key shaft being unable to be used normally. It is necessary to produce a flat key shaft with a corresponding keyway separately, resulting in the flat key shaft having a single compatibility and being unable to be installed with mating parts of various models, reducing the efficiency of the flat key shaft.

[0004] Therefore, it is necessary to redesign the flat key shaft to effectively prevent the phenomenon that the size of its keyway is fixed. Utility Model Content

[0005] In order to solve the problems raised in the above-mentioned background technology, the purpose of the utility model is to provide an adjustable flat key shaft, which has the advantage of replaceable adjustment, and solves the problem that the size of the keyway on the surface of the flat key shaft is fixed. When encountering mating parts of other sizes, the keyway cannot be connected with the mating part, resulting in the flat key shaft being unable to be used normally. It is necessary to produce a flat key shaft with a corresponding keyway separately, resulting in the flat key shaft having a single compatibility and being unable to be installed with mating parts of various models, thereby reducing the efficiency of the use of the flat key shaft.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable flat key shaft, comprising a flat key shaft body, a mounting groove is provided on the top of the flat key shaft body, a replacement part is arranged inside the mounting groove, a key groove is provided on the top of the replacement part, a clamping groove is provided on both sides of the replacement part, a bayonet is provided inside the clamping groove, the side of the bayonet away from the replacement part passes through the interior of the flat key shaft body, and the outer side of the bayonet is fixedly connected to a mounting mechanism.

[0007] As a preferred embodiment of the utility model, the mounting mechanism includes a movable plate, the movable plate is fixedly connected to the outer side of the bayonet, the side of the movable plate away from the bayonet is fixedly connected with an inclined block 1, the top of the inclined block 1 is provided with an inclined block 2, the side of the inclined block 2 away from the inclined block 1 is fixedly connected with a screw sleeve, the internal thread of the screw sleeve is connected with a screw rod, the top of the screw rod passes through the top of the flat key shaft body, and the top of the screw rod is fixedly connected with a knob.

[0008] As a preferred embodiment of the utility model, a stabilizing sleeve is provided on the surface of the bayonet, and the surface of the stabilizing sleeve is fixedly connected to the inner wall of the flat key shaft.

[0009] As a preferred embodiment of the present invention, the front side and the rear side of the top of the movable plate are both slidably connected with a sliding rod, and the surface of the sliding rod is fixedly connected to the inner wall of the flat key shaft body.

[0010] As a preferred embodiment of the utility model, a tension spring is sleeved on the surface of the sliding rod, the inner side of the tension spring is fixedly connected to the surface of the moving plate, and the outer side of the tension spring is fixedly connected to the inner wall of the flat key shaft.

[0011] As a preferred embodiment of the present invention, a limiting ring is fixedly connected to the top of the screw surface, and the surface of the limiting ring is in contact with the inner wall of the flat key shaft.

[0012] As a preferred embodiment of the present invention, a positioning sleeve is provided on the bottom of the screw surface, and the bottom of the positioning sleeve is fixedly connected to the bottom of the inner wall of the flat key shaft.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model drives the screw to rotate by turning the knob, and the screw drives the screw sleeve to move upward, and the screw sleeve drives the inclined block 2 to move upward, and the inclined block 1 loses its limit, and the movable plate drives the latch pin to move to the side away from the slot, and the latch pin is separated from the slot, and the slot and the replacement part lose their fixation, and the replacement part is moved upward, and the replacement part exits the interior of the installation slot, and a replacement part with a suitable surface keyway size is selected, and the replacement part is placed in the interior of the installation slot, and the operation method of fixing the replacement part is the reverse operation of the above-mentioned disassembly steps, and has the advantage of replaceable adjustment, the keyway on the surface of the flat key shaft is replaceable and adjustable, and the keyway can be connected with different mating parts, thereby improving the use efficiency of the flat key shaft.

[0015] 2. The utility model can control the bayonet pin by providing an installation mechanism to prevent the bayonet pin from being unable to move, resulting in the bayonet pin being unable to open and close freely with the slot, thereby improving the efficiency of replacing the key slot with the flat key shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a three-dimensional cross-sectional view of the replacement part of the utility model;

[0018] Figure 3 It is a three-dimensional diagram of the installation mechanism of the utility model.

[0019] In the figure: 1. flat key shaft; 2. mounting groove; 3. replacement part; 4. key groove; 5. slot; 6. bayonet pin; 7. mounting mechanism; 71. movable plate; 72. inclined block 1; 73. inclined block 2; 74. screw sleeve; 75. screw rod; 76. knob; 8. stabilizing sleeve; 9. sliding rod; 10. tension spring; 11. limit ring; 12. positioning sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figures 1 to 3 As shown, the utility model provides an adjustable flat key shaft, including a flat key shaft body 1, a mounting groove 2 is provided on the top of the flat key shaft body 1, a replacement part 3 is arranged inside the mounting groove 2, a key groove 4 is provided on the top of the replacement part 3, a clamping groove 5 is provided on both sides of the replacement part 3, a bayonet 6 is arranged inside the clamping groove 5, the side of the bayonet 6 away from the replacement part 3 passes through the interior of the flat key shaft body 1, and the outer side of the bayonet 6 is fixedly connected with a mounting mechanism 7.

[0022] refer to Figure 3 The mounting mechanism 7 includes a movable plate 71, which is fixedly connected to the outer side of the bayonet 6. The side of the movable plate 71 away from the bayonet 6 is fixedly connected to an inclined block 1 72, and an inclined block 2 73 is provided on the top of the inclined block 1 72. The side of the inclined block 2 73 away from the inclined block 1 72 is fixedly connected to a screw sleeve 74, and the internal thread of the screw sleeve 74 is connected to a screw rod 75. The top of the screw rod 75 penetrates to the top of the flat key shaft body 1, and the top of the screw rod 75 is fixedly connected to a knob 76.

[0023] As a technical optimization solution of the utility model, by setting the installation mechanism 7, the pin 6 can be controlled to avoid the pin 6 being unable to move, resulting in the pin 6 being unable to open and close freely with the slot 5, thereby improving the efficiency of the flat key shaft 1 replacing the key slot 4.

[0024] refer to Figure 3 The surface of the bayonet pin 6 is sleeved with a stabilizing sleeve 8 , and the surface of the stabilizing sleeve 8 is fixedly connected to the inner wall of the flat key shaft body 1 .

[0025] As a technical optimization solution of the utility model, by providing a stabilizing sleeve 8, the bayonet pin 6 can be stabilized to avoid the bayonet pin 6 from being skewed during use, thereby improving the stability of the bayonet pin 6 in use.

[0026] refer to Figure 3 The front side and the rear side of the top of the moving plate 71 are both slidably connected with a slide rod 9, and the surface of the slide rod 9 is fixedly connected to the inner wall of the flat key shaft body 1.

[0027] As a technical optimization solution of the utility model, by setting the slide rod 9, the sliding of the moving plate 71 can be stabilized to avoid shaking of the moving plate 71 during sliding movement, which may cause the moving plate 71 to loosen, thereby improving the sliding stability of the moving plate 71.

[0028] refer to Figure 3 A tension spring 10 is sleeved on the surface of the slide rod 9 , the inner side of the tension spring 10 is fixedly connected to the surface of the moving plate 71 , and the outer side of the tension spring 10 is fixedly connected to the inner wall of the flat key shaft body 1 .

[0029] As a technical optimization solution of the utility model, by setting a tension spring 10, the movable plate 71 can be pulled to automatically reset and move, avoiding the movable plate 71 being unable to automatically return to its original position after being pushed and requiring manual reset, thereby improving the convenience of using the movable plate 71.

[0030] refer to Figure 3 The top of the surface of the screw rod 75 is fixedly connected to a limiting ring 11 , and the surface of the limiting ring 11 contacts the inner wall of the flat key shaft body 1 .

[0031] As a technical optimization solution of the utility model, by setting a limit ring 11, the screw 75 can be limited to prevent the screw 75 from moving upward, causing the screw 75 to separate from the flat key shaft 1, thereby improving the working stability of the screw 75.

[0032] refer to Figure 3 A positioning sleeve 12 is sleeved on the bottom of the surface of the screw rod 75 , and the bottom of the positioning sleeve 12 is fixedly connected to the bottom of the inner wall of the flat key shaft body 1 .

[0033] As a technical optimization solution of the present invention, by providing a positioning sleeve 12, the screw rod 75 can be stabilized to avoid the screw rod 75 from tilting during rotation, thereby improving the use stability of the screw rod 75.

[0034] The working principle and usage process of the utility model are as follows: when in use, when the key slot 4 needs to be replaced, the knob 76 is rotated, and the knob 76 drives the screw rod 75 to rotate, and the screw rod 75 drives the screw sleeve 74 to move upward, and the screw sleeve 74 drives the inclined block 2 73 to move upward, and the inclined block 1 72 loses its limit, and the tension of the tension spring 10 drives the movable plate 71 and the inclined block 1 72 to move toward the side close to the screw rod 75, and the movable plate 71 drives the latch 6 to move toward the side away from the slot 5, and the latch 6 separates from the slot 5, and the slot 5 and the replacement part 3 lose their fixation, and the replacement part 3 is moved upward, and the replacement part 3 withdraws from the interior of the installation slot 2, and a replacement part 3 with a suitable size of the surface key slot 4 is selected, and the replacement part 3 is placed in the interior of the installation slot 2, and the operation mode of fixing the replacement part 3 is the reverse operation of the above-mentioned disassembly steps, thereby having the advantage of replaceable adjustment.

[0035] To sum up: the adjustable flat key shaft, through the coordinated use of the flat key shaft body 1, the mounting groove 2, the replacement part 3, the key groove 4, the locking groove 5, the locking pin 6 and the mounting mechanism 7, solves the problem that the size of the key groove on the surface of the flat key shaft is fixed. When encountering mating parts of other sizes, the key groove cannot be connected with the mating part, resulting in the flat key shaft being unable to be used normally. It is necessary to produce a flat key shaft with a corresponding key groove separately, resulting in the flat key shaft having a single compatibility and being unable to be installed with mating parts of various models, thereby reducing the efficiency of the use of the flat key shaft.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable flat key shaft, comprising a flat key shaft body (1), characterized in that: The flat key shaft body (1) is provided with a mounting groove (2) at the top, a replacement part (3) is arranged inside the mounting groove (2), a key groove (4) is provided at the top of the replacement part (3), a clamping groove (5) is provided on both sides of the replacement part (3), a clamping pin (6) is arranged inside the clamping groove (5), a side of the clamping pin (6) away from the replacement part (3) penetrates into the interior of the flat key shaft body (1), and a mounting mechanism (7) is fixedly connected to the outer side of the clamping pin (6).

2. The adjustable flat key shaft according to claim 1, characterized in that: The mounting mechanism (7) comprises a movable plate (71), wherein the movable plate (71) is fixedly connected to the outer side of the bayonet (6), a side of the movable plate (71) away from the bayonet (6) is fixedly connected to an inclined block 1 (72), a top of the inclined block 1 (72) is provided with an inclined block 2 (73), a side of the inclined block 2 (73) away from the inclined block 1 (72) is fixedly connected to a screw sleeve (74), an internal thread of the screw sleeve (74) is connected to a screw rod (75), a top of the screw rod (75) penetrates to the top of the flat key shaft (1), and a knob (76) is fixedly connected to the top of the screw rod (75).

3. The adjustable flat key shaft according to claim 1, characterized in that: The surface of the bayonet (6) is sleeved with a stabilizing sleeve (8), and the surface of the stabilizing sleeve (8) is fixedly connected to the inner wall of the flat key shaft body (1).

4. The adjustable flat key shaft according to claim 2, characterized in that: The front side and the rear side of the top of the movable plate (71) are both slidably connected to a sliding rod (9), and the surface of the sliding rod (9) is fixedly connected to the inner wall of the flat key shaft body (1).

5. The adjustable flat key shaft according to claim 4, characterized in that: A tension spring (10) is sleeved on the surface of the slide rod (9), the inner side of the tension spring (10) is fixedly connected to the surface of the moving plate (71), and the outer side of the tension spring (10) is fixedly connected to the inner wall of the flat key shaft (1).

6. The adjustable flat key shaft according to claim 2, characterized in that: The top of the surface of the screw rod (75) is fixedly connected to a limit ring (11), and the surface of the limit ring (11) is in contact with the inner wall of the flat key shaft (1).

7. The adjustable flat key shaft according to claim 2, characterized in that: A positioning sleeve (12) is sleeved on the bottom of the surface of the screw rod (75), and the bottom of the positioning sleeve (12) is fixedly connected to the bottom of the inner wall of the flat key shaft body (1).

Images