Mounting structure for lead screw transmission cooling

Abstract

The utility model discloses a lead screw transmission cooling installation structure, which comprises a lead screw, a bearing, a motor installation seat, a bearing gland, a locking nut, a coupler and a servo motor, the lead screw, the coupler and the servo motor are sequentially connected and fixed on the motor installation seat, the bearing is arranged between the lead screw and the motor installation seat, and the bearing gland is arranged on the motor installation seat. The bearing is tightly pressed on the motor mounting base through a bearing gland, the other end of the bearing gland is fixed through a locking nut, and the fan blade assembly is arranged on the lead screw in a sleeving mode and located between the bearing gland and the locking nut. The device is simple in structure and convenient to install; the fan blade assembly is additionally arranged and used along with the lead screw, the lead screw transmission can achieve the cooling effect, and the problem that the transmission precision of a machine tool is affected due to expansion and thermal deformation of the lead screw end is solved. The fan blade assembly is low in cost, a manufacturer can prepare the fan blade assemblies in batches, and the fan blade assemblies are designed and installed in all machine tool transmission structures.

Description

Technical Field

[0001] The utility model relates to an installation structure for screw rod transmission cooling. Background Art

[0002] Currently, machine tools on the market generally use direct-connected servo motors to drive the screw to rotate, thereby achieving the transmission function.

[0003] As the screw rod rotates at high speed, a large amount of heat will be generated at the transmission end of the screw rod. The heat will cause the screw rod end to expand and thermally deform, thereby affecting the transmission accuracy of the machine tool. Therefore, a machine tool with a direct-connected motor and a screw rod needs to be designed with a cooling and heat dissipation structure at the transmission end.

[0004] The technical solutions designed by machine tool manufacturers on the market are as follows: Figure 1 As shown: it includes the following parts: 1. screw rod; 2. bearing; 3. coupling; 4. servo motor; 5. oil pipe joint (oil inlet); 6. oil pipe joint (oil return port); 7. motor mounting seat; 8. O-ring; 9. bearing seat; 10. oil circuit block A; 11. oil circuit block B; 12. locking nut.

[0005] The servo motor is fixed on the motor mounting seat. The servo motor and the lead screw are connected by a coupling, so the servo motor shaft end can directly drive the lead screw to rotate at high speed. The large amount of heat generated by high-speed rotation is mainly generated by the bearings and the servo motor. In particular, when the bearing heats up to an extreme level, it is very easy to be damaged or its service life will be reduced.

[0006] This screw transmission cooling mechanism uses bearings for upper and lower fixation at the screw end. The bearings are installed inside the bearing seat, and the bearing seat is installed inside the oil circuit block A. At the motor end, the oil circuit block B is installed inside the motor mounting seat. Oil holes are opened in the oil circuit block A and the motor mounting seat, and oil pipe joints are installed. The external cooling oil can enter the internal mechanism from the external cooling device through the oil pipe joint at the (oil inlet), and then flow back to the external cooling device from the oil pipe joint at the (oil outlet). In this process, the heat transfer effect is used to achieve the cooling effect on the transmission structure. At the same time, the screw transmission cooling mechanism also installs O-rings before and after the bearing seat and the oil circuit block B to prevent the cooling oil from flowing out of the installation gap of the parts.

[0007] Disadvantages of this structure:

[0008] 1. This structure requires many parts and is complex, which places high demands on the actual machine tool installer. At the same time, many parts are designed in this structure, and the parts need to be matched and installed with each other. The precision and error of the processing size of each part need to be controlled, which indirectly increases the manufacturing and installation costs of the machine tool.

[0009] 2. This structure requires external cooling equipment and cooling oil, and the cooling oil may leak in the event of damage to the O-ring, the end of the O-ring life, or poor installation of parts, which will affect the difficulty of later maintenance of the machine tool;

[0010] 3. When the screw stops and the machine tool stops using, additional control is required to shut down the external cooling equipment. Otherwise, the parts will be over-cooled and the surface below normal temperature will condense to form water droplets, thereby accelerating the oxidation and rusting of the parts surface.

[0011] Based on the above three points, machine tool manufacturers cannot apply the screw cooling structure to machine tool equipment in large quantities. Utility Model Content

[0012] The technical problem mainly solved by the utility model is to provide an installation structure for cooling a screw drive, which has a simple structure and is easy to install. It only requires adding a fan blade assembly, and there is no need to purchase additional external cooling equipment or perform other controls. When used with the screw, the screw drive can bring a cooling effect, and the problem of expansion and thermal deformation at the screw end, which affects the transmission accuracy of the machine tool, can be solved. The cost of the fan blade assembly is low, and the manufacturer can prepare the fan blade assembly in batches, and design and install it in the transmission structure of each machine tool.

[0013] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide an installation structure for screw transmission cooling, including a screw, a bearing, a motor mounting seat, a bearing cover, a locking nut, a coupling and a servo motor, the screw, the coupling and the servo motor are sequentially connected and fixed on the motor mounting seat, a bearing is arranged between the screw and the motor mounting seat, the bearing is pressed on the motor mounting seat by a bearing cover, and the other end of the bearing cover is fixed by a locking nut, and also includes a fan blade assembly, which is sleeved on the screw and located between the bearing cover and the locking nut.

[0014] In a preferred embodiment of the present invention, the fan blade assembly includes a spacer ring and a fan blade part.

[0015] In a preferred embodiment of the present invention, the spacer ring and the fan blade part are both sleeved on the screw rod, and the spacer ring and the fan blade part are sequentially arranged between the bearing cover and the locking nut.

[0016] In a preferred embodiment of the utility model, a hollow structure is provided on the top of the motor mounting seat and an upper cover plate is locked and fixed thereto.

[0017] In a preferred embodiment of the present invention, a heat dissipation cavity is provided at the lower portion of the motor mounting seat.

[0018] The beneficial effects of the utility model are as follows: the utility model points out an installation structure for cooling a screw drive, which has a simple structure and is easy to install; only by adding a fan blade assembly, there is no need to purchase additional external cooling equipment, and no other controls are required. When used with the screw, the screw drive can bring a cooling effect, solving the problem of expansion and thermal deformation at the screw end, thereby affecting the transmission accuracy of the machine tool; the cost of this fan blade assembly is low, and manufacturers can prepare fan blade assemblies in batches, and design and install them in the transmission structures of various machine tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0020] Figure 1 It is a schematic diagram of an existing cooling structure of the background technology;

[0021] Figure 2 The utility model is a structural schematic diagram of a preferred embodiment of a screw drive cooling installation structure. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 2 , the utility model embodiment includes:

[0024] A screw drive cooling installation structure comprises a screw 1, a bearing 2, a motor mounting seat 3, a bearing gland 4, a locking nut 7, a coupling 8, a servo motor 9 and a fan blade assembly.

[0025] The screw rod 1 , the coupling 8 and the servo motor 9 are sequentially connected and fixed on the motor mounting seat 3 , and the screw rod 1 is driven to rotate on the motor mounting seat 3 by the servo motor 9 .

[0026] A bearing 2 is arranged between the screw rod 1 and the motor mounting seat 3 to ensure the stable support and positioning of the screw rod 1. The bearing 2 is pressed on the motor mounting seat 3 through a bearing pressure cover 4 to ensure that the bearing 2 is fixed and stable.

[0027] The other end of the bearing gland 4 is fixed by a locking nut 7 to ensure the stability of the bearing 2 assembly.

[0028] The fan blade assembly is sleeved on the screw rod 1 and is located between the bearing cover 4 and the locking nut 7 to ensure the stability of the fan blade assembly.

[0029] The fan blade assembly includes a spacer ring 5 and a fan blade part 6.

[0030] The spacer ring 5 and the fan blade part 6 are both sleeved on the screw rod 1, and the spacer ring 5 and the fan blade part 6 are sequentially arranged between the bearing cover 4 and the locking nut 7. The spacer ring 5 is used to separate the bearing cover 4 and the fan blade part 6 to increase the use space of the fan blade part 6. The fan blade part 6 rotates synchronously with the screw rod 1 to generate wind force and quickly take away the heat.

[0031] The top of the motor mounting seat 3 is provided with a hollow structure and is locked and fixed with an upper cover plate 10, so that the entire transmission mechanism is in a semi-enclosed space, so that the chips of the machine tool will not enter the transmission mechanism during the processing.

[0032] A heat dissipation cavity 11 is provided at the lower portion of the motor mounting seat 3 to facilitate the wind force generated during the rotation of the fan blade part 6 to remove the heat.

[0033] In summary, the utility model points out an installation structure for screw drive cooling, which has a simple structure and is easy to install; it only needs to add a fan blade assembly, and there is no need to purchase additional external cooling equipment, and there is no need to do other controls. When used with the screw, the screw drive can bring a cooling effect, and solve the problem of expansion and thermal deformation at the screw end, thereby affecting the transmission accuracy of the machine tool; the cost of this fan blade assembly is low, and the manufacturer can prepare the fan blade assembly in batches, and design and install it in the transmission structure of each machine tool.

[0034] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A screw drive cooling installation structure, comprising a screw, a bearing, a motor mounting seat, a bearing gland, a locking nut, a coupling and a servo motor, wherein the screw, the coupling and the servo motor are sequentially connected and fixed on the motor mounting seat, a bearing is arranged between the screw and the motor mounting seat, the bearing is pressed on the motor mounting seat by a bearing gland, and the other end of the bearing gland is fixed by a locking nut, characterized in that: It also includes a fan blade assembly, which is sleeved on the screw rod and located between the bearing cover and the locking nut.

2. The screw drive cooling installation structure according to claim 1, characterized in that: The fan blade assembly includes a spacer ring and a fan blade part.

3. The screw drive cooling installation structure according to claim 2, characterized in that: The spacer ring and the fan blade parts are both sleeved on the screw rod, and the spacer ring and the fan blade parts are sequentially arranged between the bearing cover and the locking nut.

4. The screw drive cooling installation structure according to claim 1, characterized in that: The top of the motor mounting seat is provided with a hollow structure and is locked and fixed with an upper cover plate.

5. The screw drive cooling installation structure according to claim 1, characterized in that: A heat dissipation cavity is arranged at the lower part of the motor mounting seat.

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